CN109723085B - Deep foundation pit division construction rib wall support replacing structure and construction method thereof - Google Patents
Deep foundation pit division construction rib wall support replacing structure and construction method thereof Download PDFInfo
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Abstract
The invention discloses a deep foundation pit-dividing construction rib wall support-changing structure and a construction method thereof, wherein a reinforced concrete support-changing shear wall with the thickness of 300mm is arranged from a basement bottom plate to a basement top plate elevation, the horizontal space and the positioning distance of the support-changing shear wall are determined according to foundation pit concrete support beams in a region II, the support-changing shear wall is constructed along with a basement structure and is connected with a diaphragm wall mid-partition wall by using embedded bars. After the rib wall is adopted to replace the support, after the floor slab in the basement of the first area is constructed, two layers of earthwork of the adjacent second area can be excavated, the earthwork of the adjacent area is excavated in advance, and then the two pits are simultaneously constructed. The construction process is the same as that of a permanent structure shear wall, and the force transmission of the rib wall is reliable. The invention is suitable for foundation pit engineering of foundation pit excavation and reclamation.
Description
Technical Field
The invention relates to the field of construction, in particular to a deep foundation pit-dividing construction rib wall support-replacing structure and a construction method thereof.
Background
Along with the urbanization process of China, the foundation pit engineering scale is larger and larger, the excavation depth is deeper and deeper, and the surrounding environment is more and more complex. The excavation depth of the foundation pit commonly reaches 20-30 m, and the excavation area reaches 2-6 ten thousand m2The subway, pipeline and other units require to separate the foundation pit, perform excavation and basement structure construction in different areas based on the strict requirement of foundation pit deformation control, and provide higher requirements for foundation pit enclosure design and construction; the surrounding environment of the foundation pit tends to be more complex, and urban underground pipelines, subway facilities and surrounding shallow foundation buildings are more sensitive to deformation influence caused by deep foundation pit construction; in addition, the construction process also involves the problems of short construction period, labor rush and the like, such as: foundation pit earth excavation strides over spring festival, exhibitions etc. influence factor that stops work, if do not form the structure bottom plate during the time of stopping work, the pressure-bearing water drop during the time of stopping workThe water construction and the accumulated deformation of the foundation pit can cause serious influence on the surrounding environment. The method is particularly important for solving the problems, and therefore, a rib wall support changing construction method is summarized in similar engineering practices, a rib wall support changing construction method is arranged in a foundation pit, two layers of earthwork of adjacent areas can be excavated after a floor slab in a basement is constructed, and the requirements of shortening construction period, protecting surrounding environment and the like are met.
Disclosure of Invention
The invention aims to solve the technical problem of providing a deep foundation pit division construction rib wall support changing structure and a construction method thereof, wherein a conventional foundation pit division construction project is broken, after a basement in a first area is positive and negative zero, a foundation pit in a second area can be excavated, and the supporting force of the foundation pit in the second area needs to be provided by a basement floor in the first area on one side of a partition wall. After the rib wall is adopted for support replacement, after a floor slab (such as a B2 floor slab) in a basement of the first area is constructed, two layers of earthwork of the adjacent second area can be excavated, the earthwork of the adjacent area is excavated in advance, then the two pits are simultaneously constructed, the total construction time of the foundation pit is shortened, the space-time effect of foundation pit engineering is reduced, surrounding buildings (structures) are protected, and the problems that the construction period is long, the foundation pit is deformed greatly, the influence on the surrounding environment is large and the like when the conventional construction method is adopted for the partitioned construction foundation pit are solved.
The technical problem to be solved by the invention is realized by the following technical scheme:
the utility model provides a deep basal pit divides hole construction rib wall to trade and props structure, the 300mm thick reinforced concrete who sets up from basement bottom plate to basement roof elevation place trades and props the shear force wall, trades to prop between the level of shear force wall and the location apart from confirming according to the foundation ditch concrete supporting beam in II district, trades to prop the shear force wall and constructs along with basement structure is together, adopts the bar planting to connect with diaphragm wall mid-board.
Preferably, in the above technical scheme, the support-replacing shear wall is arranged from the bottom plate to the top plate of the basement, and the support-replacing shear wall is over against the foundation pit concrete support beam in the area ii.
Preferably, in the above technical solution, the width of the support-changing shear wall is 300mm, the length is 10m, and the height is the same as the height of the basement structure layer.
A construction method for replacing supports of rib walls in pit-by-pit construction of a deep foundation pit comprises the steps of excavating two layers of earthwork of adjacent areas II after the support of the rib walls is replaced and a floor slab in a basement of the area I is constructed, excavating the earthwork of the adjacent areas in advance, and then simultaneously carrying out construction operation on the two pits.
Preferably, in the above technical scheme, the construction method is to reserve the support-replacing shear wall dowel bars in the reserved stage during the construction of the bottom plate, and to simultaneously construct the reinforcement bars, the templates and the concrete pouring of the support-replacing shear wall in the range in the construction stage of the underground four-layer structure, and reserve the support-shearing wall dowel bars in the previous layer, and so on.
Preferably, in the above technical solution, the construction method specifically includes:
(1) dismantling the fourth support in the I area and constructing an underground four-layer structure:
the construction of the support-replacing rib wall and the structure is carried out synchronously, the joint position of the rib wall and the bottom plate is reserved with inserted bars, and the joint position of the rib wall and the partition wall is subjected to bar planting treatment to ensure that the rib wall and the structure are connected firmly;
(2) dismantling a third support in the I area and constructing an underground three-layer structure:
the construction of the support rib-changing wall and the structure is carried out synchronously, and the reinforcing steel bars of the floor slab are reinforced in the range of two sides of the wall body and the wall end;
the civil air defense opening, the wall column and the lattice column are avoided in the plane arrangement, so that the construction is convenient and fast, and the damage to the permanent structure in the later dismantling process of the rib wall is avoided;
(3) i area second support dismantling and underground two-layer structure construction
After the board B2 in the area I is finished, continuing the construction of the B1-layer structure in the area I, and excavating and supporting the second-layer soil in the starting area II; in order to ensure the effective transmission of the supporting axial force of the area II, the ribbed wall structure in the support changing range of the area I is constructed preferentially, and the B1 plate in the ribbed wall range is formed no later than the second support of the area II.
(4) And (3) replacing and supporting the underground rib wall in the I area:
the support change construction of the underground rib wall of the area I is carried out, after the area of the B1 plate of the area I exceeds 50 percent and the concrete strength of the B1 plate of the main body structure in the range reaches 80 percent of the design strength, the 3 rd layer of earthwork can be excavated and the 3 rd support can be constructed in the area II;
(5) dismantling the first support in the I area and constructing an underground layer structure:
the supporting rib-changing wall in the range of the underground layer reaches the design strength, after the B1 boards are completely finished and reach the design strength, the 1 st support and the B0 board can be dismantled in the area I, and the area II is in the process of excavating the 3 rd layer earthwork and constructing the 3 rd support;
(6) removal of rib wall
The rib wall is removed after the basement structure in the area I is +/-0.00, and the rib wall is removed from top to bottom by adopting a cutting mode in consideration of the protection of the permanent structure; the rib wall is formed by following the principle of layering and partitioning when the support replacing structure is dismantled; after the connecting position of the rib wall and the structural slab is removed and the rib wall and the structural slab are manually chiseled and leveled, epoxy resin cement mortar is adopted for repairing.
The technical scheme of the invention has the following beneficial effects:
(1) the pit division can be carried out synchronously, so that the construction period is greatly shortened: the conventional method for dividing the foundation pit is to excavate the foundation pit of the second area after the basement of the first area is positive or negative, and the supporting force of the foundation pit of the second area is provided by the basement floor of the first area on one side of the partition wall. After the rib wall is adopted for support replacement, after the floor slab (such as B2 floor slabs) in the basement of the area I is constructed, two layers of earthwork of the adjacent area II can be excavated, the earthwork of the adjacent area is excavated in advance, and then the two pits are simultaneously constructed.
(2) The rib wall and the structure are constructed synchronously, and the construction period of a key line is not occupied: the rib wall and the structure are carried out synchronously, the inserted bars are reserved on the bottom plate at the position of the rib wall, the middle partition wall is planted with the bars, and construction is carried out layer by layer along with the structure, so that the construction period of a key line is not occupied.
(3) Rib wall passes power reliable and stable, construction is convenient: the rib wall is from the bottom plate to the underground layer, the whole stress is transmitted to the rib wall by the adjacent region support, the rib wall is transmitted to each layer of beam slab and bottom plate, and each layer of structure is stressed together, so that the stress of the support is more stable. The construction process adopts a mature reinforced concrete construction process, and is simple and convenient to operate, safe and reliable.
(4) And reducing the deformation of the foundation pit: the total construction time of the foundation pit is shortened, the space-time effect of the foundation pit engineering is reduced, and surrounding buildings (structures) are protected.
Drawings
FIG. 1 is a construction flow chart of rib wall support replacement in deep foundation pit-dividing construction according to the invention.
Fig. 2 is a schematic plan view of a rib wall support replacing structure for deep foundation pit-dividing construction of the invention.
Detailed Description
The following detailed description of specific embodiments of the invention is provided to facilitate a further understanding of the invention.
The 300mm thick reinforced concrete that sets up from basement bottom plate to basement roof elevation changes and props shear force wall 1, and it is confirmed (with just to the foundation ditch concrete supporting beam in II districts as the standard) according to the foundation ditch concrete supporting beam in II districts to trade between the level and the location distance of propping the shear force wall, changes to prop the shear force wall and construct along with basement structure together, adopts the bar planting to connect with diaphragm wall mid-board. After the rib wall is adopted for support replacement, after the floor slab (such as B2 floor slabs) in the basement of the area I is constructed, two layers of earthwork of the adjacent area II can be excavated, the earthwork of the adjacent area is excavated in advance, and then the two pits are simultaneously constructed. The construction process is the same as that of a permanent structure shear wall, and the force transmission of the rib wall is reliable.
And determining the horizontal spacing and the positioning distance of the support-changing shear wall 1 according to the foundation pit concrete support beam in the area II of the foundation pit in the area II, and taking the foundation pit concrete support beam 2 which is just opposite to the area II as a reference, wherein the support-changing shear wall is a reinforced concrete shear wall with the thickness of 300 mm.
The specific construction method comprises the following steps:
(1) i area fourth support dismantling and underground four-layer structure (including ribbed wall) construction
The rib wall and the structure are constructed synchronously, the inserted bars are reserved at the connecting position of the rib wall and the bottom plate, and the bar planting treatment is carried out at the connecting position of the rib wall and the partition wall, so that the rib wall and the structure are firmly connected.
(2) I area third support dismantling and underground three-layer structure (ribbed wall) construction
The construction of the rib wall and the structure is carried out synchronously, and the reinforcing steel bars of the floor slab and the additional reinforcing steel bars of the floor slab are reinforced in the range of two sides of the wall body and the wall end.
The civil air defense mouth part, the wall column and the lattice column are avoided in the plane arrangement, so that the construction is convenient and fast, and the damage to the permanent structure in the later-stage rib wall replacement and removal process is also avoided.
(3) I area second support dismantling and underground two-layer structure (including ribbed wall) construction
And after the board B2 in the area I is finished, continuing the construction of the B1-layer structure in the area I, and excavating and supporting the second-layer soil in the area II. In order to ensure the effective transmission of the supporting axial force of the area II, the ribbed wall structure in the support changing range of the area I is constructed preferentially, and the B1 plate in the ribbed wall range is formed no later than the second support of the area II.
(4) I area underground layer rib wall support replacing construction
And (3) carrying out support change construction on the underground rib wall of the I area, after the area of the B1 board of the I area exceeds 50 percent (the underground structure adjacent to the intermediate wall is constructed in a limited way), and after the concrete strength of the B1 board of the main structure in the range reaches 80 percent of the design strength, excavating the 3 rd layer of earthwork and constructing the 3 rd support in the II area.
(5) I area first support is demolishd and one layer of underground structure construction
The rib wall is changed to prop in the one-storey scope in the underground and reaches design intensity, and after the B1 board is all accomplished and reaches design intensity, the 1 st support, construction B0 board can be demolishd in district I, and II district is in excavation 3 rd layer earthwork and construction 3 rd support in-process.
(6) Removal of rib wall
And (3) after the basement structure in the area I is +/-0.00, the rib wall is removed, and in consideration of the protection of the permanent structure, the rib wall is removed from top to bottom by adopting a cutting mode. The ribbed wall belongs to a support replacing structure, bears the supporting force of a foundation pit, and is removed according to the principle of layering and partitioning. After the connecting position of the rib wall and the structural slab is removed and the rib wall and the structural slab are manually chiseled and leveled, epoxy resin cement mortar is adopted for repairing.
The rib wall setting method is stable and reliable in force transmission and convenient and fast in construction, synchronous construction can be achieved through pit division, construction period is greatly shortened, the rib wall and the structure are synchronously constructed, construction period of a key line is not occupied, and deformation of a foundation pit and the periphery is reduced. The working condition requirement that the foundation pit of the second area can be excavated after the basement of the first area is subjected to positive and negative zero is broken through in the conventional foundation pit partition construction project. After the rib wall is adopted for support replacement, after a floor slab (such as a B2 floor slab) in a basement of the first area is constructed, two layers of earthwork of the adjacent second area can be excavated, the earthwork of the adjacent area is excavated in advance, then the two pits are simultaneously constructed, the total construction time of the foundation pit is shortened, the space-time effect of foundation pit engineering is reduced, surrounding buildings (structures) are protected, and the problems that the construction period is long, the foundation pit is deformed greatly, the influence on the surrounding environment is large and the like when the conventional construction method is adopted for the partitioned construction foundation pit are solved.
Although the present invention has been described with reference to the above embodiments, it should be understood that the present invention is not limited thereto, and various changes and modifications may be made by those skilled in the art without departing from the spirit and scope of the present invention.
Claims (4)
1. A construction method for a deep foundation pit-dividing construction rib wall support-changing structure is characterized in that a reinforced concrete rib wall (1) with the thickness of 300mm is arranged at the elevation position from a basement bottom plate to a basement top plate, the horizontal distance and the positioning distance of the rib wall (1) are determined according to a foundation pit concrete support beam (2) in a region II, the rib wall (1) is constructed along with the basement structure and is connected with a diaphragm wall by using a planting bar (3);
the construction method of the deep foundation pit-divided construction rib wall support-changing structure comprises the steps of constructing a floor slab in a basement of a first area after rib wall support changing, excavating two layers of earthwork of adjacent second areas after construction, excavating earthwork of the adjacent areas in advance, and then simultaneously performing construction operation on two pits; the construction method specifically comprises the following steps:
(1) dismantling the fourth support in the I area and constructing an underground four-layer structure:
the rib wall and the structure are constructed synchronously, the joint position of the rib wall and the bottom plate is reserved with a steel bar, and the joint position of the rib wall and the partition wall is subjected to steel bar planting treatment to ensure that the rib wall and the structure are firmly connected;
(2) dismantling a third support in the I area and constructing an underground three-layer structure:
the rib wall and the structure are constructed synchronously, and floor slab reinforcing steel bars and floor slab additional reinforcing steel bars are carried out on two sides of a rib wall body and in the range of the rib wall end;
the civil air defense opening, the wall column and the lattice column are avoided in the plane arrangement, so that the construction is convenient and fast, and the damage to the permanent structure in the later dismantling process of the rib wall is avoided;
(3) i area second support dismantling and underground two-layer structure construction
After the board B2 in the area I is finished, continuing the construction of the B1 layer structure in the area I, and starting the excavation and supporting construction of the second layer soil in the area II; in order to ensure the effective transmission of the supporting axial force of the area II, the ribbed wall structure in the support changing range of the area I is constructed preferentially, and a B1 plate in the ribbed wall range is formed no later than a second support of the area II;
(4) and (3) replacing and supporting the underground rib wall in the I area:
the support change construction of the underground rib wall of the area I is carried out, after the area of the B1 plate of the area I exceeds 50 percent and the concrete strength of the B1 plate of the main body structure in the range reaches 80 percent of the design strength, the 3 rd layer of earthwork can be excavated and the 3 rd support can be constructed in the area II;
(5) dismantling the first support in the I area and constructing an underground layer structure:
the supporting rib-changing wall in the range of the underground layer reaches the design strength, after the B1 boards are completely finished and reach the design strength, the 1 st support and the B0 board can be dismantled in the area I, and the area II is in the process of excavating the 3 rd layer earthwork and constructing the 3 rd support;
(6) removal of rib wall
The rib wall is removed after the basement structure in the area I is +/-0.00, and the rib wall is removed from top to bottom by adopting a cutting mode in consideration of the protection of the permanent structure; the rib wall is formed by following the principle of layering and partitioning when the support replacing structure is dismantled; after the connecting position of the rib wall and the structural slab is removed and the rib wall and the structural slab are manually chiseled and leveled, epoxy resin cement mortar is adopted for repairing.
2. The construction method of the deep foundation pit-dividing construction rib wall support-changing structure according to claim 1, wherein the support-changing shear wall (1) is arranged from a bottom plate to a top plate of a basement, and the support-changing shear wall (1) is opposite to a foundation pit concrete support beam in a zone II.
3. The construction method of the deep foundation pit branch construction rib wall support replacing structure is characterized in that the width of the rib wall (1) is 300mm, the length of the rib wall is 10m, and the height of the rib wall is the same as the height of a basement structure layer.
4. The construction method of the rib wall support-changing structure for deep foundation pit division construction according to claim 1, characterized in that the construction method is to reserve support-changing shear walls (1) dowel bars in a reserved stage during bottom plate construction, simultaneously construct reinforcement bars, templates and concrete pouring of the support-changing shear walls (1) in the range in an underground four-layer structure construction stage, reserve the support-changing shear walls (1) dowel bars in the previous layer, and so on.
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Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000058238A (en) * | 1999-10-30 | 2000-10-05 | 홍원기 | Underground construction method using permanent reinforced concrete girders as temporary struts |
| CN202247904U (en) * | 2011-10-20 | 2012-05-30 | 中建六局第三建筑工程有限公司 | Quick support changing structure for ultra-deep and oversized foundation pit construction |
| CN103590406A (en) * | 2013-11-29 | 2014-02-19 | 中船第九设计研究院工程有限公司 | Construction method for synchronously excavating ultra-large type deep foundation pits in partitioned mode |
| CN104947681A (en) * | 2015-07-07 | 2015-09-30 | 中建三局第二建设工程有限责任公司 | Super large super deep basement ground pit construction method |
| KR101641293B1 (en) * | 2015-06-29 | 2016-07-20 | (주)대안소일텍 | Double line retaining wall self-reliance composite wall construction method for reinforcement pile wall |
| CN106836238A (en) * | 2017-03-06 | 2017-06-13 | 浙江省建建设集团有限公司 | A kind of construction method and its structure for falling the vertical floor support replacement of grade formula deep basal pit |
-
2019
- 2019-01-17 CN CN201910042852.XA patent/CN109723085B/en active Active
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20000058238A (en) * | 1999-10-30 | 2000-10-05 | 홍원기 | Underground construction method using permanent reinforced concrete girders as temporary struts |
| CN202247904U (en) * | 2011-10-20 | 2012-05-30 | 中建六局第三建筑工程有限公司 | Quick support changing structure for ultra-deep and oversized foundation pit construction |
| CN103590406A (en) * | 2013-11-29 | 2014-02-19 | 中船第九设计研究院工程有限公司 | Construction method for synchronously excavating ultra-large type deep foundation pits in partitioned mode |
| KR101641293B1 (en) * | 2015-06-29 | 2016-07-20 | (주)대안소일텍 | Double line retaining wall self-reliance composite wall construction method for reinforcement pile wall |
| CN104947681A (en) * | 2015-07-07 | 2015-09-30 | 中建三局第二建设工程有限责任公司 | Super large super deep basement ground pit construction method |
| CN106836238A (en) * | 2017-03-06 | 2017-06-13 | 浙江省建建设集团有限公司 | A kind of construction method and its structure for falling the vertical floor support replacement of grade formula deep basal pit |
Non-Patent Citations (1)
| Title |
|---|
| 复杂环境下大型深基坑分区换撑施工技术;唐春燕;《建筑与科技》;20130731;第1-6页 * |
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