CN220080034U - Supporting system capable of actively controlling deformation - Google Patents
Supporting system capable of actively controlling deformation Download PDFInfo
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- CN220080034U CN220080034U CN202321463791.2U CN202321463791U CN220080034U CN 220080034 U CN220080034 U CN 220080034U CN 202321463791 U CN202321463791 U CN 202321463791U CN 220080034 U CN220080034 U CN 220080034U
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- 229910000831 Steel Inorganic materials 0.000 claims abstract description 53
- 239000011150 reinforced concrete Substances 0.000 claims abstract description 53
- 239000010959 steel Substances 0.000 claims abstract description 53
- 230000002093 peripheral effect Effects 0.000 claims abstract description 24
- 238000007789 sealing Methods 0.000 claims description 7
- 230000003014 reinforcing effect Effects 0.000 claims description 3
- 238000010276 construction Methods 0.000 abstract description 15
- 238000009412 basement excavation Methods 0.000 abstract description 6
- 238000005516 engineering process Methods 0.000 abstract description 2
- 239000002689 soil Substances 0.000 description 11
- 230000008901 benefit Effects 0.000 description 7
- 239000004567 concrete Substances 0.000 description 5
- 230000007613 environmental effect Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 3
- 238000005192 partition Methods 0.000 description 3
- OKTJSMMVPCPJKN-UHFFFAOYSA-N Carbon Chemical compound [C] OKTJSMMVPCPJKN-UHFFFAOYSA-N 0.000 description 2
- 229910052799 carbon Inorganic materials 0.000 description 2
- 239000004568 cement Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000012986 modification Methods 0.000 description 2
- 230000004048 modification Effects 0.000 description 2
- 230000009467 reduction Effects 0.000 description 2
- 239000002002 slurry Substances 0.000 description 2
- 238000006467 substitution reaction Methods 0.000 description 2
- 229910001294 Reinforcing steel Inorganic materials 0.000 description 1
- 230000009471 action Effects 0.000 description 1
- 238000005452 bending Methods 0.000 description 1
- 230000005540 biological transmission Effects 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 238000006073 displacement reaction Methods 0.000 description 1
- 238000004134 energy conservation Methods 0.000 description 1
- 230000001788 irregular Effects 0.000 description 1
- 239000000463 material Substances 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000002245 particle Substances 0.000 description 1
- 230000008569 process Effects 0.000 description 1
- 230000002787 reinforcement Effects 0.000 description 1
- 238000004062 sedimentation Methods 0.000 description 1
- 238000000638 solvent extraction Methods 0.000 description 1
- 230000009295 sperm incapacitation Effects 0.000 description 1
- 238000003756 stirring Methods 0.000 description 1
- 239000000126 substance Substances 0.000 description 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 1
Abstract
The utility model belongs to a supporting system capable of actively controlling deformation in the field of building foundation pit supporting and foundation. The technical proposal is as follows: the periphery of the foundation pit is provided with a peripheral enclosure body, and the inner part of the foundation pit is provided with a reinforced concrete supporting area and a steel supporting area; a vertical support pile and a horizontal reinforced concrete support are arranged in the reinforced concrete support area; a transverse servo axial force steel support is arranged in the steel support area; the outer side of the peripheral enclosing body is a high-environment protection area; the steel supporting area is arranged between the high environment protection area and the reinforced concrete supporting area; a peripheral enclosure body is arranged between the steel support area and the high environment protection area; the servo axial force steel support is connected with the peripheral enclosure body and the reinforced concrete support area. The reinforced concrete supporting area is constructed first and then the steel supporting area is constructed. The technology simplifies the construction work content of foundation foundations, and simply, conveniently and effectively solves the problem of foundation pit excavation deformation in high-environment protection areas.
Description
Technical Field
The utility model belongs to the field of building foundation pit support and foundation, and particularly relates to a support system capable of actively controlling deformation of a foundation pit in an excavation stage so as to achieve a sensitive environment protection effect, which can be widely applied to foundation pit engineering with higher protection requirement environments on the periphery.
Background
Since the middle 90 s of the 20 th century, china formally enters the urban underground space development and utilization era, and the construction of high-rise building basements, underground malls, underground parking lots, large subway stations, underground substations and the like caused by large-scale underground space development is accompanied by the generation of a large number of deep foundation pit projects; and the foundation pit is bigger and bigger in scale and deeper in excavation depth. Especially after 21 st century, rail transit facilities have become more popular; further implementation of urban main municipal pipeline ground entering engineering; the history protection building is further issued and defined; important buildings such as hospitals, schools, residences, precision equipment factories and the like are further emphasized; in the foundation pit engineering close to the object, a stricter deformation control index is required to be executed in the implementation process, and the object is strictly forbidden to generate larger sedimentation deformation, even damage and incapacitation due to the earth digging and unloading operation in the foundation pit. According to foundation pit engineering technical standard DG/TJ08-61-2018 of Shanghai city engineering construction specifications, the environmental protection of foundation pit engineering is divided into a first stage, a second stage and a third stage from high to low.
At present, in order to meet deformation control indexes of primary and secondary foundation pit engineering with high environmental protection, the technical measures adopted in the design and construction are as follows: a) The cross section size of the members of the peripheral enclosing body is increased to improve the bending rigidity of the peripheral enclosing body, so that the enclosing body is less deformed under the condition of bearing the same out-of-pit load and action; b) A large-area foundation is arranged in the soil body of the passive area inside the foundation pit for reinforcement, namely: injecting the solidified slurry into soil gaps by utilizing hydraulic, pneumatic or chemical principles, and cementing original loose soil particles or cracks into a whole, or taking cement as a main agent of a solidifying agent, hardening soft soil into a pile body with integrity, water stability and certain strength by a special deep stirring machine, finally improving the bearing capacity of a foundation, and improving the strength and deformation property of the soil body so as to achieve the purpose of reducing the deformation of a foundation pit enclosure; c) When the foundation pit engineering area is large or the shape is irregular, the original foundation pit engineering is divided into a plurality of small partition foundation pits by arranging the internal temporary partition enclosure body, the small partition foundation pits close to the sensitive environment are constructed finally by utilizing the space-time effect principle, and measures such as a servo axial force automatic compensation system steel support are taken, so that the deformation of the enclosure body at the sensitive environment side is controlled. All three measures increase the construction cost of the project due to the fact that a large amount of foundation construction contents are increased to different degrees, and the economic benefit of the construction project is not facilitated; meanwhile, the use of a larger amount of materials such as reinforcing steel bars, cement and the like and the discharge of slurry are contrary to the environment-friendly idea.
Disclosure of Invention
In order to solve the technical problems, the utility model provides the support system capable of actively controlling the deformation, which simplifies the construction work content of foundation foundations and simply and effectively solves the foundation pit excavation deformation of high-environment protection areas.
The technical scheme of the utility model is as follows: the support system capable of actively controlling deformation is characterized in that the periphery of a foundation pit is provided with a peripheral enclosure body, and the inner part of the foundation pit is provided with a reinforced concrete support area and a steel support area; a vertical support pile and a horizontal reinforced concrete support are arranged in the reinforced concrete support area; a transverse servo axial force steel support is arranged in the steel support area; the outer side of the peripheral enclosing body is a high-environment protection area; the steel supporting area is arranged between the high environment protection area and the reinforced concrete supporting area; a peripheral enclosure body is arranged between the steel support area and the high environment protection area; the servo axial force steel support is connected with the peripheral enclosure body and the reinforced concrete support area.
Based on the technical characteristics: and (3) reinforcing the joint of the reinforced concrete support and the servo axial force steel support, wherein a haunching node is adopted at the joint, namely haunching is carried out at the intersection node of the reinforced concrete support, so as to form the splayed brace.
Based on the technical characteristics: a connecting side span in the reinforced concrete supporting area, wherein the connecting side span is adjacent to the steel supporting area; and a reinforced concrete sealing plate is arranged in the connecting side span.
Based on the technical characteristics: the support system is disposed on a non-first layer.
The basic idea of the utility model is: the reinforced concrete support has the advantages of large rigidity in a plane and small limitation on arrangement form. The steel support has the advantage that prestress can be applied to actively control deformation, but the arrangement mode is limited. The utility model can exert the advantages of the two, and is suitable for deep foundation pit engineering with various shapes and areas.
Firstly, basin-type soil excavation is carried out to form a reinforced concrete support, then, the earthwork on the side with higher environmental protection requirements is excavated in a partitioning and blocking mode, namely, the earthwork of a steel support area is excavated along with the arrangement of a servo axial force steel support, so that the problem that the existing axial force servo concrete support is firstly deformed and then the outer top compensation causes soil disturbance outside a pit can be avoided, and the foundation pit deformation can be controlled by exerting the space-time effect more easily. The length of the steel support is controlled to be 10 m-20 m, so that the design without the upright post can be realized, the quick support can be conveniently excavated, and meanwhile, the requirements of basin-type soil retaining and slope releasing can be met. The steel support system can adopt a purlin system with a purlin and a purlin system without the purlin: the enclosing purlin system is suitable for discrete peripheral enclosing bodies, such as filling row piles, occluding piles, SMW construction method piles and the like; the non-enclosing purlin system is suitable for continuous peripheral enclosing bodies such as underground continuous walls and the like. The concrete supports of the corresponding connecting side spans can realize reliable force transmission and balanced stress by arranging sealing plates, haunching splayed struts and the like and improving the transverse support bearing capacity.
Through the targeted design adjustment of the reinforced concrete support system and the control requirement of the basin-type soil excavation Shi Gongbu sequence, the reinforced concrete support system and the servo prestressed steel support system are effectively fused, and the advantages of the reinforced concrete support system and the servo prestressed steel support system are simultaneously exerted. Therefore, the problem that the existing axial force servo concrete support disturbs soil outside a pit is solved, the application range is enlarged, the axial force servo concrete support is applicable to deep foundation pits with different shapes and areas, the displacement of the enclosure body on the environment protection side can be effectively controlled, and the low carbon, energy conservation and emission reduction are further realized due to the reduction of foundation construction content of a foundation.
Drawings
Fig. 1 is a plan view of a support system that actively controls deformation.
Fig. 2 is a cross-sectional view of a support system that actively controls deformation.
The component numbers in the figure are: a peripheral enclosure 1; a reinforced concrete support 2; a haunching node 3; a reinforced concrete sealing plate 4; a vertical support pile 5; a servo axial force steel support 6; a high environmental protection area A; a steel support area B; a reinforced concrete supporting area C; and connecting the side span D.
Description of the embodiments
The following describes the embodiments of the present utility model in further detail with reference to the accompanying drawings. These embodiments are merely illustrative of the present utility model and are not intended to be limiting.
In the description of the present utility model, it should be noted that the terms "center", "longitudinal", "lateral", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", etc. indicate orientations or positional relationships based on the orientations or positional relationships shown in the drawings, are merely for convenience in describing the present utility model and simplifying the description, and do not indicate or imply that the apparatus or elements referred to must have a specific orientation, be configured and operated in a specific orientation, and thus should not be construed as limiting the present utility model. In the description of the present utility model, it should be noted that the terms "mounted," "connected," and "connected," should be construed broadly, unless otherwise explicitly specified and defined, and the specific meaning of the terms in the present utility model will be understood by those of ordinary skill in the art in view of the specific circumstances.
The utility model effectively fuses the reinforced concrete support system and the servo prestressed steel support system, and simultaneously plays the advantages of the reinforced concrete support system and the servo prestressed steel support system. Thereby achieving the aims of reducing soil disturbance, expanding the application range, effectively controlling deformation and saving energy with low carbon. The specific description below refers to the accompanying drawings:
as shown in fig. 1 and 2, the periphery of the foundation pit is a peripheral enclosure 1, and the peripheral enclosure 1 is a concrete wall. The inner part of the peripheral enclosing body 1 is provided with a reinforced concrete supporting area C and a steel supporting area B; a vertical support pile 5 and a reinforced concrete support 2 are arranged in the reinforced concrete support area C; a servo axial force steel support 6 is arranged in the steel support area B; the outer side of the peripheral enclosing body 1 is a high-environment protection area A; the steel supporting area B is arranged between the high-environment protection area A and the reinforced concrete supporting area C; a peripheral enclosure body 1 is arranged between the steel support area B and the high-environment protection area A; one end of a servo axial force steel support 6 is connected with the reinforced concrete support 2, and the other end is connected with the peripheral enclosing body 1.
Further, the joint of the reinforced concrete support 2 and the servo axial force steel support 6 adopts a haunching node 3 at the joint, namely, the joint of the crossed reinforced concrete support 2 is directly haunched to form a splayed support.
Further, a connecting side span D is reinforced, and the connecting side span D is positioned at the side edge of the reinforced concrete supporting area C and is adjacent to the steel supporting area B. The reinforced concrete sealing plate 4 is arranged in the connecting side span, so that the connecting side span is formed into a whole plate.
In addition, according to the regulations of the Shanghai municipal engineering construction Specification (foundation pit engineering technical Standard) DG/TJ08-61-2018, the steel support cannot be set as the first-layer support, so the support system of the patent is limited to the non-first-layer support. However, the technology of this patent may also be used at the top level if there is no relevant mandatory specification or provision locally.
Referring to fig. 1 and 2, the specific construction steps of the present utility model are as follows:
step one: a peripheral enclosure 1 and vertical support piles 5 are constructed.
Step two: and excavating earthwork within the range of the reinforced concrete supporting area C, and reserving the earthwork of the steel supporting area B, so that an excavating area with a basin shape with low middle and high side edges is formed.
Step three: and (5) constructing a reinforced concrete support. According to the arrangement characteristics of the servo axial force steel support 6, the joint of the reinforced concrete support 2 and the servo axial force steel support 6 is reinforced, and if the armpit joint 3 is adopted at the joint. And/or the connection side span D of the reinforced concrete supporting area C is reinforced, and the reinforced concrete sealing plate 4 is arranged in the reinforced concrete supporting side span adjacent to the steel supporting area B.
Step four: and excavating earthwork of the steel support area B after the construction of the reinforced concrete support 2, the haunched node 3 and the reinforced concrete sealing plate 4 is completed.
Step five: and (3) finishing the erection construction and axial force application of the servo axial force steel support 6 in the steel support area B. Finally, the reinforced concrete support system and the servo steel support system are fused, and the advantages of the reinforced concrete support system and the servo steel support system are exerted.
The construction method of the support system can be circularly constructed according to the support elevation, namely, a first patent support system at a first elevation a is constructed according to the first to fifth steps, then a second patent support system at a second elevation b is constructed, and the second to fifth steps are repeated; and (3) constructing from top to bottom, and finally constructing a third patent support system at a third elevation c, and repeating the second to fifth steps.
The foregoing is merely a preferred embodiment of the present utility model, and it should be noted that modifications and substitutions can be made by those skilled in the art without departing from the technical principles of the present utility model, and these modifications and substitutions should also be considered as being within the scope of the present utility model.
Claims (4)
1. An actively controllable deformation support system, characterized by: the periphery of the foundation pit is provided with a peripheral enclosing body (1), and the inner part of the foundation pit is provided with a reinforced concrete supporting area (C) and a steel supporting area (B); a vertical supporting pile (5) and a horizontal reinforced concrete support (2) are arranged in the reinforced concrete support area (C); a transverse servo axial force steel support (6) is arranged in the steel support area (B); the outer side of the peripheral enclosing body (1) is provided with a high-environment protection area (A); the steel support area (B) is arranged between the high-environment protection area (A) and the reinforced concrete support area (C); the peripheral enclosure body (1) is arranged between the steel supporting area (B) and the high-environment protection area (A); the servo axial force steel support (6) is connected with the peripheral enclosing body (1) and the reinforced concrete supporting area (C).
2. An actively controllable deformation support system according to claim 1, wherein: reinforcing the joint of the reinforced concrete support (2) and the servo axial force steel support (6), adopting a haunching node (3) at the joint, and haunching at the intersection node of the reinforced concrete support (2) to form a splayed support.
3. An actively controllable deformation support system according to claim 1 or 2, wherein: reinforcing a connecting span (D) within the reinforced concrete support zone (C), the connecting span (D) being adjacent to the steel support zone (B); and a reinforced concrete sealing plate (4) is arranged in the connecting side span (D).
4. An actively controllable deformation support system according to claim 1, wherein: the support system is disposed on a non-first layer.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321463791.2U CN220080034U (en) | 2023-06-09 | 2023-06-09 | Supporting system capable of actively controlling deformation |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202321463791.2U CN220080034U (en) | 2023-06-09 | 2023-06-09 | Supporting system capable of actively controlling deformation |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN220080034U true CN220080034U (en) | 2023-11-24 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202321463791.2U Active CN220080034U (en) | 2023-06-09 | 2023-06-09 | Supporting system capable of actively controlling deformation |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN220080034U (en) |
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2023
- 2023-06-09 CN CN202321463791.2U patent/CN220080034U/en active Active
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