CN115233694B - Anti-floating flexible combined support for foundation pit and construction method thereof - Google Patents
Anti-floating flexible combined support for foundation pit and construction method thereof Download PDFInfo
- Publication number
- CN115233694B CN115233694B CN202211002128.2A CN202211002128A CN115233694B CN 115233694 B CN115233694 B CN 115233694B CN 202211002128 A CN202211002128 A CN 202211002128A CN 115233694 B CN115233694 B CN 115233694B
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- underground
- wall
- support
- diaphragm wall
- underground diaphragm
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Classifications
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D17/00—Excavations; Bordering of excavations; Making embankments
- E02D17/02—Foundation pits
- E02D17/04—Bordering surfacing or stiffening the sides of foundation pits
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- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D15/00—Handling building or like materials for hydraulic engineering or foundations
- E02D15/08—Sinking workpieces into water or soil inasmuch as not provided for elsewhere
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D31/00—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution
- E02D31/10—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure
- E02D31/12—Protective arrangements for foundations or foundation structures; Ground foundation measures for protecting the soil or the subsoil water, e.g. preventing or counteracting oil pollution against soil pressure or hydraulic pressure against upward hydraulic pressure
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D33/00—Testing foundations or foundation structures
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/18—Bulkheads or similar walls made solely of concrete in situ
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/22—Piles
- E02D5/34—Concrete or concrete-like piles cast in position ; Apparatus for making same
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
-
- E—FIXED CONSTRUCTIONS
- E02—HYDRAULIC ENGINEERING; FOUNDATIONS; SOIL SHIFTING
- E02D—FOUNDATIONS; EXCAVATIONS; EMBANKMENTS; UNDERGROUND OR UNDERWATER STRUCTURES
- E02D2600/00—Miscellaneous
- E02D2600/30—Miscellaneous comprising anchoring details
Abstract
The application relates to an anti-floating flexible combined support for a foundation pit, which comprises a support pile, an underground continuous wall, a wallboard, a bottom plate and a flexible combined device, and is characterized in that: the underground diaphragm wall is characterized in that the supporting piles and the underground diaphragm wall are arranged in the front and the back, the underground diaphragm wall is arranged on the inner side of the foundation pit, the supporting piles are arranged on the rear side of the underground diaphragm wall, the bottom of the underground diaphragm wall faces the foundation pit and is provided with a bottom plate, the vertical faces of the underground diaphragm wall are uniformly distributed with wall plates, the wall plates are perpendicular to the underground diaphragm wall, and the flexible combination device is arranged between the supporting piles and the underground diaphragm wall. Through setting up the form of self-resetting, guaranteed the pressure release and the self-resetting of underground diaphragm wall, when groundwater pressure is too big and the precipitation is not time spent, can realize the initiative come-up of underground diaphragm wall through the cooperation of wind-up roll and elasticity preparation, but does not destroy overall structure.
Description
Technical Field
The application relates to the technical field of foundation pit anti-floating, in particular to a foundation pit anti-floating flexible combined support and a construction method thereof.
Background
The anti-floating form of the underground foundation pit of the building generally adopts anti-floating anchoring or self-weight form of the building, so that the damage cause, mechanism and characteristics of the building caused by floating up are deeply known in the existing soil mechanics research, and the richer anti-floating practical experience is accumulated, and the damage types are found to be approximately divided into two conditions: the light person only slightly deviates the actual elevation from the designed elevation, and the light person can recover by adopting simple measures such as loading, pumping and the like; when severe, the bottom plate of the auxiliary supporting structure is raised, cracked and permeated, local concrete is crushed, the safety and normal use of the structure are directly affected, and the structure can be stabilized or restored by adopting comprehensive methods such as loading, pumping, decompressing, sand washing and the like. In construction, brittle failure of the supporting structure is often caused due to untimely treatment, the time of foundation pit dewatering cannot be strived for, and in the existing engineering, active pressure relief is needed while dewatering is carried out, so that the continuous wall is pressed and simultaneously maintains a certain dynamic stable state.
Disclosure of Invention
In order to solve the problems, the application provides an anti-floating flexible combined support for a foundation pit, which is realized by adopting the following technical scheme:
the foundation pit anti-floating flexible combined support comprises a support pile, underground continuous walls, wall plates, a bottom plate and a flexible combination device, wherein the support pile and the underground continuous walls are arranged front and back, the underground continuous walls are arranged on the inner sides of the foundation pit, the support pile is arranged on the rear side of the underground continuous walls, the bottom of the underground continuous walls faces the bottom plate in the foundation pit, the wall plates are uniformly distributed on the vertical surfaces of the underground continuous walls, the wall plates are vertically arranged with the underground continuous walls, the flexible combination device is arranged between the support pile and the underground continuous walls, and the flexible combination device comprises bottom anchor cables, a middle pre-tightening device and an upper connecting beam; the bottom anchor cable passes through the end face of the wallboard and passes through the support pile; the upper connecting beam is arranged at the tops of the underground diaphragm wall and the supporting piles, one end of the upper connecting beam is fixedly connected with the tops of the underground diaphragm wall, and the other end of the upper connecting beam is connected with the tops of the supporting piles through elastic supports; the middle pre-tightening device comprises a pressure detection device, a winding roller and a steel cable, one end of the steel cable transversely penetrates through the underground continuous wall and is locked on the support pile, the other end of the steel cable is fixed on the underground continuous wall through the winding roller, the pressure detection device is arranged on the steel cable, and the pressure detection device is mounted close to the underground continuous wall.
The wallboard is big end down's trapezium structure, the bottom plate lower part sets up the dogtooth.
And the top parts of the support piles and the underground diaphragm wall are respectively provided with a crown beam, and the upper connecting beams are connected to the underground diaphragm wall and the crown beams of the support piles. The support piles are arranged at equal intervals, and the support piles are connected through flexible pieces.
In addition, the application also comprises a construction method of the foundation pit anti-floating flexible combined support, wherein a support pile is firstly constructed, a steel rope mounting hole and a bottom anchor rope penetrating hole are constructed at the corresponding position of the support pile, then an underground continuous wall is constructed, the underground continuous wall is connected with the support pile through an upper connecting beam, one end of the upper connecting beam is fixedly connected with the top of the underground continuous wall, the other end of the upper connecting beam is connected with the top of the support pile through an elastic support, and the bottom plate and the wall plate of the underground continuous wall are integrally prefabricated; constructing a bottom anchor cable and a middle pre-tightening device, wherein the bottom anchor cable penetrates through the end face of the wallboard and the supporting pile, and penetrates into the foundation pit soil body by no less than 15m; the middle pre-tightening device comprises a pressure detection device, a wind-up roller and a steel cable, wherein the steel cable is anchored on the support pile through a steel cable mounting hole, when the underground water level rises, the pressure detection device firstly detects pressure increase, if the pressure exceeds a preset value, the pressure detection device is loosened through the wind-up roller, the elastic support at the upper connecting beam floats upwards and is finely adjusted when the underground continuous wall floats, when the underground water level falls, the pressure detection device firstly detects pressure decrease, if the pressure reaches a safety value, the pressure is tensioned through the wind-up roller, and at the moment, the elastic support returns under the gravity action of the underground continuous wall.
The beneficial effects of the application are as follows:
1. the foundation pit anti-floating flexible combined support can basically solve the problem that the support strength is guaranteed in a foundation pit with abundant groundwater, and the vertical stability of the foundation pit is guaranteed through a two-layer opposite-pull type.
2. Through setting up flexible anti-floating subassembly, can satisfy the general anti-floating requirement of structure to through the cooperation anchor with supporting construction, further make supporting construction rigid and flexible form more firm.
2. Through setting up the form of self-resetting, guaranteed the pressure release and the self-resetting of underground diaphragm wall, when groundwater pressure is too big and the precipitation is not time spent, can realize the initiative come-up of underground diaphragm wall through the cooperation of wind-up roll and elasticity preparation, but does not destroy overall structure.
Drawings
In order to more clearly illustrate the technical solutions of the embodiments of the present application, the drawings that are needed in the description of the embodiments will be briefly described below, it being obvious that the drawings in the following description are only some embodiments of the present application, and that other drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.
Fig. 1 is a schematic cross-sectional view of a foundation pit anti-floating flexible combined support according to an embodiment of the present application.
Fig. 2 is a schematic front view of a foundation pit anti-floating flexible combined support according to an embodiment of the present application.
Description of the embodiments
The present application will be further understood by the following description of embodiments, but the specific embodiments given by the applicant should not be considered as limiting the technical solution of the present application, and any modification of the definition of components or technical features and/or the form of the whole structure without substantial change should be considered as the protection scope defined by the technical solution of the present application.
The application aims to overcome the defects, and thus provides the anti-floating flexible combined support for the foundation pit.
The application is realized by adopting the following technical scheme:
the foundation pit anti-floating flexible combined support comprises a support pile 1, an underground diaphragm wall 2, wall plates 3, a bottom plate 4 and a flexible combination device, wherein the support pile and the underground diaphragm wall are arranged front and back, the underground diaphragm wall is arranged on the inner side of a foundation pit, the support pile is arranged on the rear side of the underground diaphragm wall, the bottom of the underground diaphragm wall faces towards the interior of the foundation pit, the wall plates 3 are uniformly distributed on the vertical surfaces of the underground diaphragm wall, the wall plates are perpendicular to the underground diaphragm wall, the flexible combination device is arranged between the support pile and the underground diaphragm wall, and the flexible combination device comprises a bottom anchor cable 5, a middle pre-tightening device 6 and an upper connecting beam 7; the bottom anchor cable passes through the end face of the wallboard and passes through the support pile 1; the upper connecting beam is arranged at the tops of the underground diaphragm wall and the supporting piles, one end of the upper connecting beam 7 is fixedly connected with the tops of the underground diaphragm wall, and the other end of the upper connecting beam is connected with the tops of the supporting piles through elastic supports; the middle pre-tightening device comprises a pressure detection device 61, a winding roller 62 and a steel cable 63, one end of the steel cable transversely penetrates through the underground diaphragm wall and is locked on the support pile, the other end of the steel cable is fixed on the underground diaphragm wall through the winding roller 62, the pressure detection device 61 is arranged on the steel cable, and the pressure detection device is mounted close to the underground diaphragm wall.
The wallboard is big end down's trapezium structure, the bottom plate lower part sets up the dogtooth.
And the top parts of the support piles and the underground diaphragm wall are respectively provided with a crown beam, and the upper connecting beams are connected to the underground diaphragm wall and the crown beams of the support piles. The support piles are arranged at equal intervals, and the support piles are connected through flexible pieces.
In addition, the application also comprises a construction method of the foundation pit anti-floating flexible combined support, wherein a support pile is firstly constructed, a steel rope mounting hole and a bottom anchor rope penetrating hole are constructed at the corresponding position of the support pile, then an underground continuous wall is constructed, the underground continuous wall is connected with the support pile through an upper connecting beam, one end of the upper connecting beam is fixedly connected with the top of the underground continuous wall, the other end of the upper connecting beam is connected with the top of the support pile through an elastic support, and the bottom plate and the wall plate of the underground continuous wall are integrally prefabricated; constructing a bottom anchor cable and a middle pre-tightening device, wherein the bottom anchor cable penetrates through the end face of the wallboard and the supporting pile, and penetrates into the foundation pit soil body by no less than 15m; the middle pre-tightening device comprises a pressure detection device, a wind-up roller and a steel cable, wherein the steel cable is anchored on the support pile through a steel cable mounting hole, when the underground water level rises, the pressure detection device firstly detects pressure increase, if the pressure exceeds a preset value, the pressure detection device is loosened through the wind-up roller, the elastic support at the upper connecting beam floats upwards and is finely adjusted when the underground continuous wall floats, when the underground water level falls, the pressure detection device firstly detects pressure decrease, if the pressure reaches a safety value, the pressure is tensioned through the wind-up roller, and at the moment, the elastic support returns under the gravity action of the underground continuous wall.
The above description is only of the preferred embodiments of the present application, and is not intended to limit the structure of the present application in any way. Any simple modification, equivalent variation or modification of the above embodiments according to the technical substance of the present application still falls within the scope of the technical solution of the present application.
Claims (5)
1. The utility model provides a foundation ditch anti flexible combination support that floats, includes support stake, underground diaphragm wall, wallboard, bottom plate and flexible composite set, its characterized in that: the supporting piles and the underground diaphragm wall are arranged front and back, the underground diaphragm wall is arranged on the inner side of the foundation pit, the supporting piles are arranged on the rear side of the underground diaphragm wall, the bottom of the underground diaphragm wall faces towards the interior of the foundation pit, the vertical faces of the underground diaphragm wall are uniformly provided with wall plates, the wall plates are arranged perpendicular to the underground diaphragm wall, the flexible combination device is arranged between the supporting piles and the underground diaphragm wall, and the flexible combination device comprises bottom anchor cables, a middle pre-tightening device and an upper connecting beam; the bottom anchor cable passes through the end face of the wallboard and passes through the support pile; the upper connecting beam is arranged at the tops of the underground diaphragm wall and the supporting piles, one end of the upper connecting beam is fixedly connected with the tops of the underground diaphragm wall, and the other end of the upper connecting beam is connected with the tops of the supporting piles through elastic supports; the middle pre-tightening device comprises a pressure detection device, a winding roller and a steel cable, one end of the steel cable transversely penetrates through the underground continuous wall and is locked on the support pile, the other end of the steel cable is fixed on the underground continuous wall through the winding roller, the pressure detection device is arranged on the steel cable, and the pressure detection device is mounted close to the underground continuous wall.
2. The foundation pit anti-floating flexible composite support according to claim 1, wherein: the wallboard is the trapezoid structure of big end down, the bottom plate lower part sets up the dogtooth.
3. The foundation pit anti-floating flexible composite support according to claim 1, wherein: and the top parts of the support piles and the underground diaphragm wall are respectively provided with a crown beam, and the upper connecting beams are connected to the underground diaphragm wall and the crown beams of the support piles.
4. The foundation pit anti-floating flexible composite support according to claim 1, wherein: the support piles are arranged at equal intervals, and the support piles are connected through flexible pieces.
5. A method of constructing a foundation pit anti-floating flexible composite support according to any one of claims 1-4, wherein: firstly constructing a support pile, constructing a steel cable mounting hole and a bottom anchor cable penetrating hole at the corresponding position of the support pile, then constructing an underground continuous wall, and connecting the underground continuous wall with the support pile through an upper connecting beam, wherein one end of the upper connecting beam is fixedly connected with the top of the underground continuous wall, the other end of the upper connecting beam is connected with the top of the support pile through an elastic support, and the bottom plate and the wall plate of the underground continuous wall are integrally prefabricated; constructing a bottom anchor cable and a middle pre-tightening device, wherein the bottom anchor cable penetrates through the end face of the wallboard and the supporting pile, and penetrates into the foundation pit soil body by no less than 15m; the middle pre-tightening device comprises a pressure detection device, a wind-up roller and a steel cable, wherein the steel cable is anchored on the support pile through a steel cable mounting hole, when the underground water level rises, the pressure detection device firstly detects pressure increase, if the pressure exceeds a preset value, the pressure detection device is loosened through the wind-up roller, the elastic support at the upper connecting beam floats upwards and is finely adjusted when the underground continuous wall floats, when the underground water level falls, the pressure detection device firstly detects pressure decrease, if the pressure reaches a safety value, the pressure is tensioned through the wind-up roller, and at the moment, the elastic support returns under the gravity action of the underground continuous wall.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002128.2A CN115233694B (en) | 2022-08-20 | 2022-08-20 | Anti-floating flexible combined support for foundation pit and construction method thereof |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202211002128.2A CN115233694B (en) | 2022-08-20 | 2022-08-20 | Anti-floating flexible combined support for foundation pit and construction method thereof |
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| Publication Number | Publication Date |
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| CN115233694A CN115233694A (en) | 2022-10-25 |
| CN115233694B true CN115233694B (en) | 2023-10-13 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202211002128.2A Active CN115233694B (en) | 2022-08-20 | 2022-08-20 | Anti-floating flexible combined support for foundation pit and construction method thereof |
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| JPH0657778A (en) * | 1992-05-13 | 1994-03-01 | Shimizu Corp | System for preventing building from becoming buoyant because of groundwater |
| JP2004285678A (en) * | 2003-03-20 | 2004-10-14 | Fujita Corp | Method and structure for suppressing buoyancy of structure |
| JP2013002109A (en) * | 2011-06-15 | 2013-01-07 | Takenaka Komuten Co Ltd | Heave suppressing pile |
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| CN111733894A (en) * | 2020-06-10 | 2020-10-02 | 中国一冶集团有限公司 | Anti-floating system of deep foundation pit underground structure and construction process |
| CN112267474A (en) * | 2020-11-06 | 2021-01-26 | 东莞市建安桩基础工程有限公司 | Foundation pit supporting structure and construction method thereof |
| CN112459078A (en) * | 2020-11-11 | 2021-03-09 | 中国建筑第二工程局有限公司 | Construction method of foundation pit supporting system |
| CN112854235A (en) * | 2020-12-31 | 2021-05-28 | 中铁建设集团基础设施建设有限公司 | Deep foundation pit supporting structure and stability monitoring and early warning system thereof |
| CN113062367A (en) * | 2021-04-06 | 2021-07-02 | 江苏光跃节能科技有限责任公司 | Underground building system with anti-floating monitoring and self-correcting functions and construction method thereof |
| CN113958198A (en) * | 2021-12-02 | 2022-01-21 | 广东中交纵横建设咨询有限公司 | Waterproof fender device that encloses of foundation ditch construction |
| CN114197492A (en) * | 2022-01-12 | 2022-03-18 | 中国建筑土木建设有限公司 | Pile-anchor supporting system capable of being adjusted in stress and construction method thereof |
| CN114892675A (en) * | 2022-05-30 | 2022-08-12 | 浙江文华建设项目管理有限公司 | Foundation pit supporting structure with foundation pit construction parameter measuring function |
-
2022
- 2022-08-20 CN CN202211002128.2A patent/CN115233694B/en active Active
Patent Citations (17)
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| JPS63125731A (en) * | 1986-11-17 | 1988-05-28 | Takenaka Komuten Co Ltd | Supporting structure and construction of building on reclaimed ground |
| JPH0657778A (en) * | 1992-05-13 | 1994-03-01 | Shimizu Corp | System for preventing building from becoming buoyant because of groundwater |
| JP2004285678A (en) * | 2003-03-20 | 2004-10-14 | Fujita Corp | Method and structure for suppressing buoyancy of structure |
| JP2013002109A (en) * | 2011-06-15 | 2013-01-07 | Takenaka Komuten Co Ltd | Heave suppressing pile |
| CN103321231A (en) * | 2013-06-10 | 2013-09-25 | 叶长青 | Construction method of foundation pit support |
| CN104452829A (en) * | 2014-11-18 | 2015-03-25 | 中大建设有限公司 | Piled raft foundation anti-floating structure and construction method |
| CN105178329A (en) * | 2015-08-08 | 2015-12-23 | 广州市设计院 | Wall supporting type supporting structure and construction method of foundation pit underground continuous wall |
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| CN112854235A (en) * | 2020-12-31 | 2021-05-28 | 中铁建设集团基础设施建设有限公司 | Deep foundation pit supporting structure and stability monitoring and early warning system thereof |
| CN113062367A (en) * | 2021-04-06 | 2021-07-02 | 江苏光跃节能科技有限责任公司 | Underground building system with anti-floating monitoring and self-correcting functions and construction method thereof |
| CN113958198A (en) * | 2021-12-02 | 2022-01-21 | 广东中交纵横建设咨询有限公司 | Waterproof fender device that encloses of foundation ditch construction |
| CN114197492A (en) * | 2022-01-12 | 2022-03-18 | 中国建筑土木建设有限公司 | Pile-anchor supporting system capable of being adjusted in stress and construction method thereof |
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|---|---|
| CN115233694A (en) | 2022-10-25 |
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