JP2010185206A - Foundation construction machine, attachment attached thereto, and foundation construction method - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a foundation construction machine capable of performing a plurality of types of construction by one type of a machine by only replacing attachments. <P>SOLUTION: The foundation construction machine 1 includes a long leader 11, a slider 2 moving along the leader, and a rotating drive device 3 attached to the slider. A top end connection port 31 and a bottom end connection port 32 for mounting the attachments 4, 5 are formed in the rotating part 30 of the rotating drive device. The top end connection port and the bottom end connection port communicate with each other through a fluid path through which fluid passes. <P>COPYRIGHT: (C)2010,JPO&amp;INPIT

Description

  The present invention relates to a foundation construction machine used for foundation work such as pile driving, ground excavation, and removal of existing piles, various attachments attached thereto, and a foundation construction method using them. .

  Conventionally, as disclosed in Patent Document 1, a pile driving device for driving an H-shaped steel material as a pile is known.

  Patent Document 2 discloses a method for constructing a cast-in-place concrete pile by forming a drilling hole with a reverse excavator and putting a reinforcing bar and concrete into the drilling hole.

  Furthermore, Patent Document 2 discloses a method of pushing a casing pipe or steel pipe connected to a drive shaft of an earth drill excavator into the ground while rotating.

JP 7-331655 A JP 2004-263561 A

  However, the pile driving device disclosed in Patent Document 1 is a dedicated machine for placing an H-shaped steel material.

  On the other hand, when implementing the reverse construction method and the method of burying the casing disclosed in Patent Document 2, dedicated construction machines such as a reverse excavator and an earth drill excavator are used.

  There are various construction machines that are used for foundation work depending on the construction type or construction method to be carried out in this way, and when implementing a plurality of construction types at one site, different construction machines must be prepared for each construction type. In particular, in a place adjacent to a railway or a narrow place, a plurality of construction machines cannot be arranged at a time, and a setup change is required for each work type, which causes a long construction period.

  In addition, there is a problem that a contractor who wants to perform various types of work needs to prepare a dedicated construction machine for each work type, which increases machine costs.

  Therefore, the present invention provides a foundation construction machine capable of carrying out a plurality of types of construction with one type of machine by simply replacing the attachment, various attachments attached thereto, and a foundation construction method using them. The purpose is that.

  In order to achieve the above object, a foundation construction machine according to the present invention includes a long leader, a slider portion that moves along the leader, and a rotary drive device attached to the slider portion. And the upper end connection port and lower end connection port for attaching an attachment are formed in the rotation part of the rotation drive device, and the passage of fluid is possible between the upper end connection port and the lower end connection port It is characterized by being connected by a simple fluid path.

  Further, the attachment of the present invention is an attachment to be attached to the foundation construction machine, and is provided on a lid part to be attached to the upper end connection port, a rotatable swivel part provided on the lid part, and an upper part of the swivel part. And a joint port portion, wherein the lid portion, the swivel portion, and the joint port portion communicate with each other in the interior. Here, the joint opening can be formed so that a fluid pressure hose can be connected. The joint opening may be formed at the end of a curved tube having an inner diameter capable of transporting fluid mixed with earth and sand.

  Furthermore, an attachment to be attached to the foundation construction machine, a receiving part to be attached to the lower end connection port, a core material attaching part that is provided below the receiving part and attaches an upper end of a core material, the receiving part, and the And a pipe part serving as a fluid path between the core member attaching part and the core member attaching part. Here, the receiving portion and the core member attaching portion are connected via a rotation mechanism, and the pipe portion is formed with a variable portion that can be deformed in accordance with the operation of the rotation mechanism. You can also

  Further, the attachment is attached to the foundation construction machine, and is provided with a receiving cover part to be attached to the lower end connection port, a hollow connecting rod part provided below the receiving cover part, and below the connecting rod part. And a tube material attaching portion for attaching the upper end of the tube material.

  Furthermore, an attachment to be attached to the foundation construction machine, a casing attachment portion for attaching an upper portion to be attached to the lower end connection port, and an upper end of a casing having a pipe provided below the upper portion and extending in the longitudinal direction. And a connecting pipe portion serving as a fluid path between the upper portion and the pipe. Here, the upper part and the casing mounting part are connected via a rotating mechanism, and the connecting pipe part is formed with a variable part that can be deformed by the operation of the rotating mechanism. You can also

  Further, the foundation construction method of the present invention is a foundation construction method performed by attaching an attachment to the foundation construction machine, and an attachment capable of supplying a fluid is attached to the upper end connection port, and includes a core attachment part. An attachment is attached to a lower end connection port, an upper end of the core member is attached to the core member attachment portion, and the core member is embedded in the ground.

  Furthermore, the upper end of the said pipe material can be attached to the said pipe material attachment part, and the ground can be excavated, conveying excavated earth and sand toward the said curved pipe from the said pipe material.

  Moreover, the upper end of the said casing can be attached to the said casing attaching part, and the method of embedding the said casing in the ground can be implemented, ejecting the high pressure fluid conveyed by the said piping. Here, the casing is provided with a pair of protrusions and cuts at the upper end and the lower end for positioning when another casing is connected, and the protrusion of one casing. It can also be set as the structure by which piping is connected if the cut | notch part of the other casing and the other casing engage.

  The foundation construction machine of this invention comprised in this way becomes a structure which attaches an attachment to an upper end connection port and a lower end connection port, respectively.

  For this reason, by changing the type of attachment to be attached, it is possible to construct various types of work with one type of foundation construction machine.

  For example, by attaching an attachment that connects the inner space of the lid, swivel, and joint port to the upper end connection port, fluid can be supplied to the rotary drive device, or fluid can be discharged through the rotary drive device. can do. That is, if the joint opening is formed so as to enable connection of a fluid pressure hose, a hose for supplying water or a stable liquid to the excavation hole can be easily connected. Further, muddy water mixed with excavated soil generated in the excavation hole can be easily discharged to the outside through a curved pipe having a large inner diameter.

  Moreover, the foundation construction machine of this invention can be used also when embed | buried in the ground as cores, such as a H-shaped steel material, by attaching the attachment provided with the core material attachment part in the lower end connection port.

  In addition, by interposing a rotation mechanism at the top of the core material mounting part, the core material can be installed sideways and installed at a height that can be reached by workers on the ground. Can be eliminated.

  In addition, by attaching an attachment with a hollow connecting rod part and a pipe attachment part to the lower end connection port, and connecting a pipe material that becomes a rod to the pipe attachment part, fluid such as mud mixed with excavated soil is removed from the excavation hole. The ground can be excavated while discharging.

  Furthermore, by attaching the attachment provided with the casing attachment portion to the lower end connection port, the casing can be embedded in the ground while rotating. Moreover, if this casing attachment part is connected via the rotation mechanism, it can be easily attached by operating the rotation mechanism so that the casing is turned sideways.

  In addition, by attaching an attachment that can supply a fluid such as a stabilizing liquid to the upper end connection port, and attaching an attachment with a core material attachment part to the lower end connection port, the core material that will become the pile is discharged while stabilizing liquid is discharged. The construction method of piles to be buried in can be implemented. Further, after the core material is inserted, a solidifying material such as cement milk is conveyed as a fluid, so that a process of covering and solidifying the periphery of the core material with the solidifying material can be performed quickly.

  In addition, the pipe material which becomes a rod is attached to the pipe material mounting part, the excavated soil is taken into the pipe material while excavating the ground with the bit at the tip of the pipe material, and the excavated soil is discharged through the curved pipe of the attachment connected to the upper end connection port By doing so, the excavation hole can be constructed by the reverse method.

  Furthermore, by attaching an attachment capable of supplying a fluid such as high-pressure water to the upper end connection port and attaching an attachment provided with a casing attachment portion to the lower end connection port, the casing can be pushed into the ground while jetting high-pressure water. If the casing is pushed into the ground in this way, the existing piles inside the casing can be removed or a drilling hole can be constructed.

  In addition, even if the pipes are extended along the inner peripheral surface of the casing, the casings can be connected in a short time if the pipes can be connected by engaging the protrusions and the cut portions. it can.

It is a side view explaining the structure of the foundation construction machine of embodiment of this invention. It is explanatory drawing explaining the structure of the attachment of Example 1. FIG. It is a figure explaining the structure of the attachment of Example 1, Comprising: (a) is a front view, (b) is a top view. It is explanatory drawing explaining the process of attaching a core material to the attachment of Example 1. FIG. It is a side view explaining the construction method of the pile of Example 1. FIG. It is explanatory drawing explaining the structure of the attachment of Example 2. FIG. It is a side view explaining the ground excavation method of Example 2. It is explanatory drawing explaining the structure of the attachment of Example 3. FIG. It is a front view explaining the embedding method of the casing of Example 3. It is a side view explaining the embedding method of the casing of Example 3. It is explanatory drawing explaining the connection method of the casing of Example 3. FIG.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings.

  FIG. 1 is a side view illustrating the configuration of a foundation construction machine 1 according to the present embodiment.

  The foundation construction machine 1 is mainly composed of a main body portion 12 provided with an engine and a driver's cab, an endless track 13 as a moving means, and a undulating leader 11 provided on the front surface of the main body portion 12.

  One end of a hydraulic cylinder 15 is attached to the back surface of the elongated reader 11, and the other end of the hydraulic cylinder 15 is attached to the main body 12. Then, by extending and contracting the hydraulic cylinder 15, the direction of the reader 11 can be made vertical (up and down direction) or sideways.

  In addition, outriggers 14 and 14 are provided in front of and behind the endless track 13 so that a necessary reaction force can be secured during construction. Further, a rocking portion 16 having a through hole (not shown) is provided in front of the endless track 13 and in the vicinity of the lower end of the reader 11 to suppress the lower end of the member whose upper end is supported by the reader 11 from swinging. It is done.

  The reader 11 is attached with a slider portion 2 that moves along the longitudinal direction thereof. The slider portion 2 moves using a rail 21 extending along the longitudinal direction on the side surface of the reader 11 as a guide.

  That is, a chain 22 is connected to the upper side of the slider portion 2, and the chain 22 laid upward is folded downward by a sprocket 23 at the upper end of the leader 11, and is sprinkled by a sprocket 23 at the lower end of the leader 11. It is folded again and connected to the lower side of the slider portion 2. When the chain 22 is turned by rotating the sprockets 23, 23, the slider portion 2 moves along the leader 11.

  Further, on the side of the slider portion 2 opposite to the reader 11, a rotation driving device 3 is projected. The rotation driving device 3 is provided at a rotating portion 30 that rotates about a rotation axis that is substantially parallel to the longitudinal direction of the reader 11, a hydraulic motor 33 that is a driving source of the rotating portion 30, and an upper end of the rotating portion 30. The upper end connection port 31 and the lower end connection port 32 provided at the lower end of the rotating unit 30 are mainly configured.

  The upper end connection port 31 and the lower end connection port 32 are formed in a form that allows attachment of a plurality of types of attachments described later. Further, it is preferable that the upper end connection port 31 and the lower end connection port 32 and the attachment are joined by means such as bolts that can be easily attached and detached.

  A fluid path (not shown) through which fluid can pass is formed between the upper end connection port 31 and the lower end connection port 32. That is, when a fluid such as water or a stabilizing liquid is supplied from the upper end connection port 31 side, it is discharged from the lower end connection port 32 side through the fluid path, and conversely, muddy water mixed with excavated soil from the lower end connection port 32 side. When fluid such as is supplied, the fluid is discharged from the upper end connection port 31 side through the fluid path.

  The details of the slider unit 2 and the rotary drive device 3 will be described in the following embodiments.

  The foundation construction machine 1 of the present embodiment configured as described above is configured to attach attachments to the upper end connection port 31 and the lower end connection port 32, respectively.

  For this reason, by changing the type of attachment to be attached, it is possible to construct various types of works with one type of foundation construction machine 1.

  Hereinafter, an attachment attached to the foundation construction machine 1 of the above-described embodiment will be described as Example 1. The description of the same or equivalent parts as those described in the above embodiment will be given the same reference numerals or names.

  In Example 1, the attachments (4, 5) used when placing the H-shaped steel material 50 as the core material on the ground G as a pile will be described with reference to FIGS. 2-5.

  FIG. 2 is a diagram illustrating a process of attaching the water supply attachment 4 to the upper end connection port 31 and attaching the core material attachment 5 to the lower end connection port 32 of the rotation driving device 3.

  First, details of the slider unit 2 and the rotary drive device 3 that have been outlined in the above embodiment will be described.

  As shown in FIGS. 2 and 3 (b), the slider portion 2 is an engagement portion formed in a substantially U shape in plan view so as to hold a square cylindrical rail 21 attached to the side surface of the reader 11. 24. A roller having a small resistance during movement is attached to a contact portion of the engagement portion 24 with respect to the rail 21.

  Further, a connecting portion 22a is provided on the upper surface of the slider portion 2, and one end of the chain 22 is connected to the connecting portion 22a. Further, a connecting portion 22b is also provided on the lower surface of the slider portion 2, and the other end of the chain 22 is connected to the connecting portion 22b.

  Further, the slider portion 2 is formed with an attachment surface 25 substantially parallel to the front surface of the reader 11, and the rotary drive device 3 is attached to the attachment surface 25.

  As shown in the side view of FIG. 2, the front view of FIG. 3 (a), and the plan view of FIG. 3 (b), the rotary drive device 3 is provided with a rotating portion 30 at the center and rotates on both sides thereof. Hydraulic motors 33, 33 serving as drive sources for the unit 30 are attached.

  The upper end of the rotating unit 30 is configured to allow attachment of various attachments as the upper end connection port 31. In addition, the lower end of the rotating unit 30 has a configuration in which various attachments can be attached as the lower end connection port 32.

  In the first embodiment, a water supply attachment 4 for supplying a stabilizing liquid to the upper end connection port 31 is attached. The water supply attachment 4 includes a lid part 41 to be attached to the upper end connection port 31, a swivel part 42 provided on the lid part 41, and a joint mouth part 43 provided on the upper part of the swivel part 42.

  The lid portion 41 is a disc-like lid having substantially the same size as the upper end connection port 31, and is fixed to the upper end connection port 31 by a plurality of bolts 41a,.

  Further, the swivel part 42 has a rotatable structure in which an upper part and a lower part are connected by a rotation shaft. For example, even if a rotational force acts on the lower part, the rotational force is not transmitted to the upper part and the upper part does not rotate. It has a configuration.

  Furthermore, a thread groove (not shown) is formed in the joint opening 43 so as to enable a highly watertight connection with a fluid pressure-feeding hose 44 that conveys a high-pressure fluid. And the stable liquid sent out by the pressure feed pump (not shown) from the stable liquid plant (not shown) is conveyed by the hose 44, and the stable liquid that has entered the water supply attachment 4 from the joint port 43 is the swivel part 42. It is supplied to the rotating part 30 through the lid part 41. For this reason, even if the rotation part 30 rotates, only the lower part of the swivel part 42 rotates with it, and the joint port part 43 and the hose 44 do not rotate.

  On the other hand, the core attachment 5 to which the H-shaped steel material 50 can be attached is attached to the lower end connection port 32. The core material attachment 5 is provided below the receiving portion 51, a receiving portion 51 to be attached to the lower end connection port 32, a pipe portion 52 serving as a fluid path for conveying the fluid flowing into the receiving portion 51 downward. And the core material attaching part 54 which attaches the upper end of the H-shaped steel material 50 is provided.

  The receiving portion 51 is formed in a box shape having an upper opening, and is fixed to the lower end connection port 32 by bolts 51a,.

  Further, the stabilizing liquid that has flowed into the receiving portion 51 flows into the variable portion 521 through the upper connecting portion 522 of the pipe portion 52. The variable portion 521 is formed of a stretchable or flexible material such as a rubber tube or a bellows tube.

  Furthermore, the stabilizing liquid that has passed through the variable portion 521 flows into the built-in tube 524 through the lower connecting portion 523 and the connecting tube 526 as shown in FIG. The built-in pipe 524 is piped in an upper space of a box-shaped core material mounting portion 54 having an open lower surface having a square shape in plan view. Then, the stabilizing liquid that has passed through the built-in pipe 524 is sent to the joint pipes 525 and 525 attached to the side surface of the core material attaching portion 54.

  Further, a rectangular parallelepiped housing portion 541 as shown in FIG. 2 is formed in the lower portion of the core mounting portion 54, and the upper end of the H-shaped steel material 50 is formed in the housing portion 541 as shown in FIG. The H-shaped steel material 50 is fixed to the core material mounting portion 54 by the fixing pin 542 inserted and inserted through the web 50 a of the H-shaped steel material 50.

  Here, the core member attaching portion 54 and the receiving portion 51 are connected via a hinge portion 53 as a rotation mechanism. That is, as shown in FIG. 3A, the attachment piece 533 protruding from the upper surface of the core member attachment portion 54 is inserted between the attachment pieces 532 and 532 suspended in parallel from the receiving portion 51, and the attachment piece 532 is inserted. , 533, 532 are connected by a rotating shaft 531 to form a hinge portion 53.

  As shown in FIG. 4, the hinge part 53 can orient the core member attaching part 54 at a substantially right angle with respect to the receiving part 51. In addition, when the hinge part 53 is rotated in this way, the variable part 521 is deformed, so that the pipe part 52 is not damaged.

  In addition, an end portion of a water supply pipe 55 is connected to the joint pipe 525 of the core member attaching portion 54, and the water supply pipe 55 extends along the web 50 a of the H-shaped steel material 50.

  Next, the method for placing the pile according to the first embodiment will be described, and the operation of the foundation construction machine 1, the water supply attachment 4, and the core attachment 5 will be described.

  First, the foundation construction machine 1 is moved to the construction position, the outriggers 14 and 14 are extended and fixed, and the hydraulic cylinder 15 is operated to erect the reader 11.

  Thus, since the foundation construction machine 1 can be self-propelled by the endless track 13, it can be quickly installed in a predetermined place. In particular, when construction is performed adjacent to the railway, the construction time is short, so the construction period can be greatly shortened by shortening the preparation time and securing a continuous long actual work time. .

  Then, the chain 22 is circulated to lower the slider portion 2 to near the lower end of the reader 11, and as shown in FIG. 2, the water supply attachment 4 is attached to the upper end connection port 31 of the rotation driving device 3 and the lower end connection port 32 is attached. A core attachment 5 is attached. A hose 44 is connected to the joint opening 43 of the water supply attachment 4.

  If the water supply attachment 4 and the core material attachment 5 are mounted in a state of being lowered to the lower end of the reader 11 in this way, it is safe and easy because it is at a height position that can be easily reached by workers on the ground. Can be installed.

  Subsequently, as shown in FIG. 4, the hinge portion 53 is rotated, and the upper end of the H-shaped steel material 50 that is also horizontally oriented is inserted into the core material attaching portion 54 that is horizontally oriented, and both are connected by the fixing pin 542. If the H-shaped steel member 50 can be attached in the horizontal direction in this way, the work at a high place does not occur, and the long H-shaped steel member 50 can be attached safely and easily.

  Further, the ends of the water supply pipes 55 and 55 are attached to the joint pipes 525 and 525 of the core attachment 5, respectively, and the water supply pipes 55 and 55 are extended toward the lower end of the H-shaped steel material 50.

  After the H-shaped steel material 50 and the water pipe 55 are attached in this way, when the slider portion 2 is moved upward, the hinge portion 53 is rotated clockwise as viewed in FIG. The steel material 50 will stand up. Here, FIG. 5 is a view showing a state in which the H-shaped steel material 50 is erected.

  The lower part of the standing H-shaped steel material 50 is inserted into the anti-vibration part 16 and a bit 501 for excavation is attached to the tip. Further, the water pipes 55 and 55 are extended to the vicinity of the bit 501.

  And when excavating the excavation hole G1 in the ground G, the rotating part 30 of the rotation drive device 3 is rotated to rotate the H-shaped steel material 50 connected thereto, and the bit 501 that rotates in association with the H-shaped steel material 50 is rotated. Ground G is cut.

  In this excavation, the stabilizing liquid sent from the hose 44 passes through the water supply attachment 4, the rotation drive device 3, and the core attachment 5 and is sent to the water supply pipes 55 and 55. It discharges toward the ground G from the lower end.

  And the collapse of the hole wall of the excavation hole G1 is prevented by the stable liquid discharged in this way. Further, since the stabilizing liquid overflowing from the excavation hole G1 contains earth and sand generated during excavation, the excavation earth and sand are also discharged.

  When the H-shaped steel member 50 is pushed into the ground G while rotating in this way and the desired pile length is not reached even if it is buried in the excavation hole G1 to the vicinity of the upper end, the attachment for the core material from the upper end of the H-shaped steel member 50 5 is cut off, and the hinge part 53 is actuated so that the core attachment 5 is turned sideways.

  Then, a new H-shaped steel material 50 is mounted on the core material attachment 5, the slider part 2 is raised to raise the H-shaped steel material 50, and a new H-shaped steel material 50 is buried at the upper end of the H-shaped steel material 50 embedded in the excavation hole G1. The lower end of the H-shaped steel material 50 is joined by welding or the like. At that time, the water pipes 55 and 55 are also connected to each other.

  After burying the H-shaped steel material 50 to the desired length in this way, the cement milk as the cement-based solidified material is fed from the hose 44 instead of the stabilizing liquid, and the gap between the excavation hole G1 and the H-shaped steel material 50 Fill with cement milk.

  The filling of the cement milk can be performed only as a solidified portion near the tip of the pile formed by the H-shaped steel material 50 or can be filled over the entire length of the H-shaped steel material 50.

  By laying the water supply pipe 55 along the H-shaped steel material 50 in this way, a stable liquid can be supplied during excavation, and the water supply pipe 55 can also be used for filling cement milk. The time required for switching is short, and a steel-concrete pile having the tip solidified pile or the H-shaped steel material 50 as a core can be quickly constructed.

  Other configurations and functions and effects are substantially the same as those in the above-described embodiment, and thus description thereof is omitted.

  Hereinafter, the attachment attached to the foundation construction machine 1 of the above-described embodiment will be described as Example 2. The description of the same or equivalent parts as those described in the embodiment or Example 1 will be given with the same reference numerals or names.

  In Example 2, the attachments (61, 62) used when the excavation hole G1 is constructed in the ground G by the reverse method will be described with reference to FIGS.

  FIG. 6 is a diagram illustrating a process of attaching the mud attachment 61 to the upper end connection port 31 of the rotation drive device 3 and attaching the rod attachment 62 to the lower end connection port 32.

  The mud attachment 61 includes a lid portion 611 to be attached to the upper end connection port 31, a rotatable swivel portion 612 provided on the lid portion 611, a curved tube 614 attached to an upper portion of the swivel portion 612, and And a joint opening 613 provided at the end of the bending tube 614.

  The lid portion 611 is a disc-shaped lid having substantially the same size as the upper end connection port 31, and is fixed to the upper end connection port 31 by a plurality of bolts 611a,. The swivel portion 612 and the bending tube 614 have an inner diameter that is approximately the same as or slightly smaller than that of the upper end connection port 31, and are formed as fluid paths capable of transporting muddy water mixed with excavated earth and sand.

  A mud pipe 615 connected to a suction pump (not shown) is connected to the joint port 613. That is, the muddy water sent to the swivel part 612 through the lid part 611 is sent out to the mud pipe 615 via the curved pipe 614 having a large inner diameter, and passed to the sediment removal plant (not shown) through the suction pump. Sent. Under the present circumstances, even if the rotation part 30 rotates, only the lower part of the swivel part 612 rotates in connection with it, and the bending pipe 614, the joint port part 613, and the mud feed pipe 615 do not rotate.

  On the other hand, a rod attachment 62 to which a hollow rod 63 as a pipe can be attached is attached to the lower end connection port 32. The rod attachment 62 includes a receiving lid portion 621 to be attached to the lower end connection port 32, a hollow connecting rod portion 622 provided below the receiving lid portion 621, and a hollow rod 63 provided below the connecting rod portion 622. And a tube attachment portion 623 for attaching the upper end of the tube.

  The receiving lid 621 is a disc-shaped lid that is substantially the same size as the lower end connection port 32, and is fixed to the lower end connection port 32 by a plurality of bolts 621a,.

  Moreover, the connecting rod part 622 is formed in the cylindrical tubular shape, and can convey fluids, such as mud water which excavated earth and sand mixed in the inner space. Further, the rod attachment 62 has rigidity capable of transmitting the rotation of the rotating unit 30 to the lower hollow rod 63.

  Next, the construction method of the excavation hole G1 by the reverse construction method of the second embodiment will be described, and the actions of the mud attachment 61 and the rod attachment 62 will be described.

  First, the slider portion 2 of the foundation construction machine 1 placed at a predetermined position is lowered by the same procedure as described in the first embodiment, and the upper end connection port 31 of the rotary drive device 3 is lowered as shown in FIG. The mud attachment 61 is attached to the lower end connection port 32 and the rod attachment 62 is attached to the lower end connection port 32. A mud pipe 615 such as a bellows hose is connected to the joint port 613 of the mud attachment 61.

  Subsequently, the upper end surface of the hollow rod 63 is brought into contact with the tube material attaching portion 623 of the rod attachment 62 and joined by a bolt (not shown).

  Here, the hollow rod 63 may be added in accordance with the progress of excavation as shown in FIG. Further, the hollow rods 63,... Are inserted into the anti-vibration part 16, and a reverse bit 64 is attached to the tip of the lowermost hollow rod 63.

  Further, the reverse bit 64 is formed with an intake port (not shown) communicating with the inner space of the hollow rod 63, and the muddy water G2 mixed with excavated soil in the excavation hole G1 is taken in from the intake port. It is.

  That is, by rotating the rotary unit 30 of the rotary drive device 3, the hollow rods 63, ... connected thereto are rotated, and excavation is performed by cutting the ground G with the reverse bit 64 that rotates in accordance therewith. It is carried out.

  Further, mud water G2 for stabilizing the hole wall is supplied from the upper end of the excavation hole G1, and the earth and sand excavated by the reverse bit 64 is sucked from the intake port of the reverse bit 64 together with the mud water G2, and the hollow rod 63 , ... will rise inside.

  Then, the muddy water G2 that has flowed into the rod attachment 62 from the uppermost hollow rod 63 flows into the mud attachment 61 through the rotation driving device 3, and is conveyed to the earth removal plant (not shown) by the mud pipe 615. .

  By using the foundation construction machine 1 by attaching the rod attachment 62 having the connecting rod portion 622 capable of transporting the muddy water G2 to the lower end connection port 32 and attaching the mud discharge attachment 61 to the upper end connection port 31. The excavation hole G1 by the reverse method can be constructed.

  That is, by connecting the hollow rod 63 to the pipe attachment portion 623 of the rod attachment 62, fluid such as mud G2 mixed with excavated earth and sand can be sucked up and discharged from the excavation hole G1. Moreover, if it is the curved pipe 614 with a large pipe diameter, even if it is the muddy water G2 which excavated earth and sand mixed, it can be passed through without trouble.

  And a cast-in-place concrete pile can be constructed | assembled by building a reinforcing bar rod and placing concrete in the excavation hole G1 excavated by the reverse construction method in this way.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  Hereinafter, the attachment attached to the foundation construction machine 1 of the above-described embodiment will be described as Example 3. The description of the same or equivalent parts as those described in the embodiment or Examples 1 and 2 will be given with the same reference numerals or names.

  In Example 3, an attachment (4, 7) used when the excavation hole G1 is constructed in the ground G using the casing 8 will be described with reference to FIGS.

  FIG. 8 is a diagram illustrating a process of attaching the water supply attachment 4 described in the first embodiment to the upper end connection port 31 of the rotation driving device 3 and attaching the casing attachment 7 to the lower end connection port 32.

  The casing attachment 7 is provided below the upper portion 71, the upper portion 71 to be attached to the lower end connection port 32, the connecting pipe portion 73 as a fluid path for conveying the fluid flowing into the upper portion 71 downward, and the casing 8. And a casing mounting portion 72 for mounting the upper end of the casing.

  A circular flange having substantially the same size as the lower end connection port 32 is formed on the upper edge of the upper portion 71, and is fixed to the lower end connection port 32 by bolts 71a,... Inserted through the flange.

  In addition, a connecting pipe portion 73 is extended from the side surface of the upper portion 71 toward the casing mounting portion 72, and the fluid that has flowed into the upper portion 71 is conveyed by the connecting pipe portion 73.

  Further, as shown in FIG. 9, the casing mounting portion 72 is formed in a cylindrical shape having a size capable of accommodating the upper end of the casing 8, and the casing 8 is fixed by operating the locking tools 721 and 721. And can be separated.

  Further, as shown in FIGS. 9-11, a water supply pipe 82 is provided along the inner peripheral surface of the casing 8, and the upper end of the water supply pipe 82 is connected to the connecting pipe portion 73.

  Here, FIG. 11 is a diagram showing details of the casing 8, and shows a configuration of a casing 8A attached to the lowermost part and a casing 8B added by a necessary number above the casing 8A.

  The casing 8A attached to the lowermost part has excavation tip bits 81,. Further, the upper end of the casing 8A is formed to have an outer diameter that is slightly smaller than the lower end. And the convex surface part 84 is provided in the surrounding surface of the upper end.

  A discharge port 82c is formed at the lower end of the water supply pipe 82 extending along the inner peripheral surface in the longitudinal direction of the casing 8A, and the outer diameter and the inner diameter of the main pipe are substantially the same at the upper end. A mouth 82b is formed.

  On the other hand, the casing 8B used for addition has a lower end formed with an inner diameter that is substantially the same as the outer diameter of the upper end of the casing 8A. Further, an inverted U-shaped cut portion 85 is formed in accordance with the position of the protruding portion 84 of the casing 8A.

  Further, a water supply pipe 82 is extended also on the inner peripheral surface of the casing 8B, and an insertion port 82a at the lower end thereof is formed to have an outer diameter that is substantially the same as the inner diameter of the receiving port 82b.

  Further, the positional relationship between the cut portion 85 of the casing 8B and the water supply pipe 82 is substantially the same as the positional relationship between the projection 84 of the casing 8A and the water supply pipe 82. That is, when the projection part 84 and the notch part 85 which become a pair mesh, the insertion port 82a of the water supply pipe 82 is inserted into the reception port 82b, and the upper and lower water supply pipes 82 and 82 are connected to each other.

  Furthermore, the upper end of the casing 8B is formed in the same form as the upper end of the casing 8A, and the casings 8B and 8B are successively formed by engaging the projections 84 and the notches 85 that form pairs with the casings 8B and 8B. In addition, the water pipes 82 and 82 can be connected.

  In addition, the structure which provides the notch part 85 in the upper end of casing 8A, 8B, and provides the projection part 84 in a lower end may be sufficient.

  Next, the construction method of the excavation hole G1 using the casing 8 of the third embodiment will be described, and the operation of the casing attachment 7 will be described.

  First, the slider portion 2 of the foundation construction machine 1 placed at the construction position by the same procedure as described in the first embodiment is lowered, and as shown in FIG. While attaching the water supply attachment 4, the casing attachment 7 is attached to the lower end connection port 32. A hose 44 for conveying high-pressure water is connected to the joint opening 43 of the water supply attachment 4.

  Subsequently, the upper end of the casing 8 is inserted into the casing attachment portion 72 of the casing attachment 7, and the lock members 721 and 721 are tightened and fixed. At this time, although not shown, the connecting pipe portion 73 and the water supply pipe 82 are connected.

  Here, the casing 8 is added as the excavation progresses, as shown in FIGS. Further, the lower part of the casing 8 is inserted into the anti-vibration part 16.

  Drilling by the casing 8 thus mounted is performed, for example, in order to remove the existing pile 83 placed on the ground G. That is, the casing 8 is pushed into the ground G so as to cover the outer periphery of the existing pile 83 as shown in FIG.

  Further, when the casing 8 is pushed in, the ground portion G is rotated by the tip bits 81,... Rotating around the casing 8 connected thereto by rotating the rotating portion 30 of the rotation driving device 3 and rotating around the casing 8. Is cut.

  Further, during this excavation, high-pressure water is jetted from the discharge port 82c of the water supply pipe 82, and cutting resistance is reduced. That is, the high-pressure water sent to the water supply attachment 4 through the hose 44 is sent to the casing attachment 7 through the rotation drive device 3, passes through the connecting pipe portion 73, and is sent to the water supply pipe 82. Then, high-pressure water is jetted toward the ground G from the discharge port 82 c at the tip of the water supply pipe 82.

  And the full length of the existing pile 82 can be removed by pushing in the casing 8 from the lower end of the existing pile 82 to the deep part. A cast-in-place concrete pile can be newly constructed in the excavation hole G1 excavated by the casing 8.

  The water supply attachment 4 capable of supplying a fluid such as high-pressure water is attached to the upper end connection port 31 and the casing attachment 7 including the casing attachment portion 72 is attached to the lower end connection port 32, thereby jetting high-pressure water. The casing 8 can be pushed into the ground G.

  Moreover, if the casing 8 is pushed into the ground G, the existing pile 83 accommodated in the casing 8 is removed, the excavation hole G1 is constructed, or a cast-in-place concrete pile is constructed following the excavation hole G1. Can be easily done.

  Furthermore, if the water supply pipe 82 is piped along the inner peripheral surface of the casing 8, even if the casing 8 is pushed into the ground G, the water supply pipe 82 does not come into contact with the hard original ground before excavation, so that the water supply pipe 82 is not damaged.

  Moreover, even if the water supply pipe 82 is extended along the inner peripheral surface of the casing 8, the protrusion 84 provided at the end of one casing 8B and the notch provided at the end of the other casing 8B. By engaging the portion 85, the water pipes 82 and 82 can be easily connected to each other. And if the water pipes 82 and 82 can be easily connected, the casings 8A, 8B and 8B can also be easily connected.

  Other configurations and functions and effects are substantially the same as those of the above-described embodiment or other examples, and thus description thereof is omitted.

  The embodiments and examples of the present invention have been described in detail with reference to the drawings. However, the specific configuration is not limited to the embodiments and examples, and the gist of the present invention is not deviated. Design changes are included in the present invention.

  For example, in Embodiment 1-3, the five types of attachments (4, 5, 61, 62, and 7) have been described. However, the present invention is not limited to this. For example, an auger screw or a metal fitting to which the auger screw is attached is used as the attachment. You can also Further, the combination of the attachment attached to the upper end connection port 31 and the attachment attached to the lower end connection port 32 is not limited to the above embodiment.

  Moreover, in the said embodiment and the said Example, although the foundation construction machine 1 was equipped with the endless track 13, it is not limited to this, Even if a moving means is a wheel etc. which drive | works a rubber tire or a rail. Good. Furthermore, the foundation construction machine which is not provided with a moving means may be sufficient.

  In the third embodiment, the casing attachment 7 in which the casing mounting portion 72 is fixed below the upper portion 71 has been described. However, the present invention is not limited to this, and the upper portion 71 and the casing are similar to the first embodiment. The attachment portion 72 can also be connected via a rotation mechanism.

  Furthermore, in the said embodiment and Example, although the slider part 2 was moved with the chain 22, it is not limited to this, The structure using a wire or a hydraulic cylinder may be sufficient.

DESCRIPTION OF SYMBOLS 1 Base construction machine 11 Reader 2 Slider part 3 Rotation drive device 30 Rotation part 31 Upper end connection port 32 Lower end connection port 4 Water supply attachment (attachment)
41 Lid part 42 Swivel part 43 Joint port part 44 Hose 5 Attachment for core material (attachment)
50 H-shaped steel (core material)
51 receiving part 52 pipe part 521 variable part 53 hinge part (rotating mechanism)
54 Core material mounting part 55 Water supply pipe 61 Waste mud attachment (attachment)
611 Lid part 612 Swivel part 613 Joint port part 614 Curved pipe 62 Rod attachment (attachment)
621 Receiving cover portion 622 Connecting rod portion 623 Tube material mounting portion 63 Hollow rod (tube material)
7 Casing attachment (attachment)
71 Upper part 72 Casing attachment part 73 Connection pipe part 8, 8A, 8B Casing 82 Water supply pipe (pipe)
84 Protruding part 85 Cutting part G Ground G1 Drilling hole G2 Muddy water (fluid)

Claims (13)

A foundation construction machine comprising a long leader, a slider portion that moves along the leader, and a rotary drive device attached to the slider portion,
An upper end connection port and a lower end connection port for attaching an attachment are formed in the rotating portion of the rotation drive device, and a fluid path that allows fluid to pass between the upper end connection port and the lower end connection port. A foundation construction machine characterized by being in communication. An attachment attached to the foundation construction machine according to claim 1,
A lid portion attached to the upper end connection port; a rotatable swivel portion provided on the lid portion; and a joint mouth portion provided on an upper portion of the swivel portion, the lid portion, the swivel portion, and the joint An attachment characterized in that the inside air communicates with the mouth.   The attachment according to claim 2, wherein the joint port portion is formed so that a fluid pressure-feeding hose can be connected thereto.   The attachment according to claim 2, wherein the joint opening is formed at an end of a curved pipe having an inner diameter capable of transporting fluid mixed with earth and sand. An attachment attached to the foundation construction machine according to claim 1,
A receiving part to be attached to the lower end connection port, a core material attaching part which is provided below the receiving part and attaches an upper end of the core material, and a pipe which becomes a fluid path between the receiving part and the core material attaching part An attachment characterized by comprising a part.   The receiving part and the core member attaching part are connected via a rotating mechanism, and the pipe part is formed with a variable part that can be deformed by the operation of the rotating mechanism. The attachment according to claim 5. An attachment attached to the foundation construction machine according to claim 1,
A receiving lid portion to be attached to the lower end connection port, a hollow connecting rod portion provided below the receiving lid portion, and a tube attachment portion provided below the connecting rod portion and attaching the upper end of the tube material. An attachment characterized by that. An attachment attached to the foundation construction machine according to claim 1,
An upper part to be attached to the lower end connection port; a casing attachment part for attaching an upper end of a casing having a pipe provided below the upper part and extending in the longitudinal direction; a fluid path between the upper part and the pipe; An attachment characterized by comprising a connecting pipe section.   The upper part and the casing attaching part are connected via a rotating mechanism, and the connecting pipe part is formed with a variable part that can be deformed by the operation of the rotating mechanism. Item 9. The attachment according to item 8. A foundation construction method that is performed by attaching an attachment to the foundation construction machine according to claim 1,
Attaching the attachment according to claim 2 or 3 to the upper end connection port,
Attaching the attachment according to claim 5 or 6 to the lower end connection port,
A foundation construction method, wherein an upper end of the core material is attached to the core material attaching portion, and the core material is embedded in the ground. A foundation construction method that is performed by attaching an attachment to the foundation construction machine according to claim 1,
Attaching the attachment according to claim 4 to the upper end connection port,
Attaching the attachment according to claim 7 to the lower end connection port,
A foundation construction method characterized in that an upper end of the pipe material is attached to the pipe material attachment portion, and the ground is excavated while transporting excavated soil from the pipe material toward the curved pipe. A foundation construction method that is performed by attaching an attachment to the foundation construction machine according to claim 1,
Attaching the attachment according to claim 3 to the upper end connection port,
Attaching the attachment according to claim 8 or 9 to the lower end connection port,
A foundation construction method, wherein an upper end of the casing is attached to the casing attaching portion, and the casing is embedded in the ground while ejecting a high-pressure fluid conveyed by the pipe.   The casing is provided with a pair of protrusions and cuts at the upper end and the lower end for positioning when another casing is connected, and the protrusions of one casing and the other The foundation construction method according to claim 12, wherein the pipes are connected when the cut portion of the casing is engaged.

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