CN115233694A - 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
- CN115233694A CN115233694A CN202211002128.2A CN202211002128A CN115233694A CN 115233694 A CN115233694 A CN 115233694A CN 202211002128 A CN202211002128 A CN 202211002128A CN 115233694 A CN115233694 A CN 115233694A
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- continuous wall
- underground continuous
- support
- foundation pit
- wall
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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
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- 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
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- 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
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- Engineering & Computer Science (AREA)
- Structural Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Mining & Mineral Resources (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Paleontology (AREA)
- Civil Engineering (AREA)
- Environmental & Geological Engineering (AREA)
- Hydrology & Water Resources (AREA)
- Force Measurement Appropriate To Specific Purposes (AREA)
- Bulkheads Adapted To Foundation Construction (AREA)
Abstract
The invention relates to a foundation pit anti-floating flexible combined support, 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 supporting piles and the underground continuous wall are arranged in the front and back direction, the underground continuous wall is arranged on the inner side of a foundation pit, the supporting piles are arranged on the rear side of the underground continuous wall, a bottom plate is arranged at the bottom of the underground continuous wall towards the foundation pit, wallboards are evenly distributed on the vertical face of the underground continuous wall and are perpendicular to the underground continuous wall, and the flexible combined device is arranged between the supporting piles and the underground continuous wall. Through setting up the form from restoring to the throne, guaranteed underground continuous wall's pressure release and from restoring to the throne, when groundwater pressure is too big and precipitation is untimely, can realize underground continuous wall's initiative come-up through the cooperation of wind-up roll and elasticity preparation, but do not destroy overall structure.
Description
Technical Field
The invention 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 an anti-floating anchoring mode or a self-weight mode of the building, the damage reason, mechanism, characteristics and the like of the building caused by floating are deeply known in the existing soil mechanics research, abundant anti-floating practical experience is accumulated, and the damage types are found to be divided into two cases: the light person only slightly deviates the actual elevation from the designed elevation, and the light person can recover the actual elevation by generally adopting simple measures such as loading, pumping water and the like; in severe cases, the bottom plate of the auxiliary supporting structure bulges, cracks and seeps water, local concrete crushing directly influences the safety and normal use of the structure, and the structure can be stabilized or restored by adopting comprehensive methods such as loading, pumping water, decompressing, sand washing and the like. In the construction, often because handle untimely, lead to supporting construction's fragile destruction, can't strive for the time of foundation ditch precipitation, often need in the current engineering while precipitation, initiatively relieve pressure on one side, make the continuous wall keep certain dynamic stable state simultaneously at the pressurized.
Disclosure of Invention
In order to solve the problems, the invention provides a flexible combined support for resisting floating of a foundation pit, which is realized by adopting the following technical scheme:
a foundation pit anti-floating flexible combined support comprises support piles, an underground continuous wall, wall plates, a bottom plate and a flexible combined device, wherein the support piles and the underground continuous wall are arranged in the front and back direction, the underground continuous wall is arranged on the inner side of a foundation pit, the support piles are arranged on the rear side of the underground continuous wall, the bottom of the underground continuous wall faces the foundation pit and is internally provided with the bottom plate, the wall plates are uniformly distributed on the vertical surface of the underground continuous wall, the wall plates are vertically arranged with the underground continuous wall, the flexible combined device is arranged between the support piles and the underground continuous wall, and the flexible combined device comprises bottom anchor cables, a middle pre-tightening device and an upper connecting beam; the bottom anchor cable penetrates through the end face of the wall plate and penetrates through the support pile; the upper connecting beam is arranged at the tops of the underground continuous wall and the supporting piles, one end of the upper connecting beam is fixedly connected with the top of the underground continuous 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 supporting 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 installed in a mode of being tightly attached to the underground continuous wall.
The wallboard is big-end-up's trapezium structure, bottom plate lower part sets up the dogtooth.
And top beams are arranged at the tops of the supporting piles and the underground continuous wall, and the upper connecting beam is connected to the top beams of the underground continuous wall and the supporting piles. The support piles are arranged at equal intervals, and the support piles are connected through flexible parts.
In addition, the invention also comprises a construction method of the anti-floating flexible combined support of the foundation pit, 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 and 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 a bottom plate and a wall plate of the underground connecting 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 wall plate and penetrates through the support pile and penetrates into the foundation pit soil body to be not less than 15m; the middle pre-tightening device comprises a pressure detection device, a winding roller and a steel cable, the steel cable is arranged on the support pile through the steel cable Kong Maogu, when the underground water level rises, the pressure detection device firstly detects that the pressure is increased, if the pressure exceeds a preset value, the winding roller is loosened, so that the elastic support at the upper connecting beam is enabled to move upwards and finely adjusted when the underground continuous wall floats upwards, when the underground water level falls, the pressure detection device firstly detects that the pressure is reduced, if a safety value is reached, the winding roller is tightened, and at the moment, the elastic support returns under the action of the gravity of the underground continuous wall.
The invention has the following beneficial effects:
1. the anti-floating flexible combined support for the foundation pit can basically ensure the support strength in the foundation pit with abundant underground water, and ensures the vertical stability of the foundation pit through a two-layer opposite-pulling mode.
2. Through setting up flexible anti subassembly that floats, can satisfy the general anti requirement of floating of structure to through the cooperation anchor with supporting construction, further make supporting construction just gentle form more firm.
2. Through setting up the form from restoring to the throne, guaranteed underground continuous wall's pressure release and from restoring to the throne, when groundwater pressure is too big and precipitation is not in time, can realize underground continuous wall's initiative come-up through the cooperation of wind-up roll and elasticity preparation, but do not destroy overall structure.
Drawings
In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the description below are only some embodiments of the present application, and it is obvious for those skilled in the art that other drawings may be obtained according to these drawings without creative efforts.
Fig. 1 is a schematic cross-sectional view of an anti-floating flexible combined support for a foundation pit according to an embodiment of the present application.
Fig. 2 is a schematic front view of an anti-floating flexible combined support for a foundation pit according to an embodiment of the present application.
Detailed Description
The invention will be better understood by the following description of embodiments thereof, but the applicant's specific embodiments are not intended to limit the invention to the particular embodiments shown, and any changes in the definition of parts or features and/or in the overall structure, not essential changes, are intended to define the scope of the invention.
The invention aims to overcome the defects, and provides the anti-floating flexible combined support for the foundation pit.
The invention is realized by adopting the following technical scheme:
a foundation pit anti-floating flexible combined support comprises support piles 1, an underground continuous wall 2, wall plates 3, a bottom plate 4 and a flexible combined device, wherein the support piles and the underground continuous wall are arranged in the front and back direction, the underground continuous wall is arranged on the inner side of a foundation pit, the support piles are arranged on the rear side of the underground continuous wall, the bottom of the underground continuous wall faces the foundation pit and is internally provided with the bottom plate 4, the wall plates 3 are uniformly distributed on the vertical face of the underground continuous wall, the wall plates are vertically arranged with the underground continuous wall, the flexible combined device is arranged between the support piles and the underground continuous wall, and the flexible combined device comprises bottom anchor cables 5, a middle pre-tightening device 6 and an upper connecting beam 7; the bottom anchor cable penetrates through the end face of the wall plate and penetrates through the supporting pile 1; the upper connecting beam is arranged at the tops of the underground continuous wall and the supporting piles, one end of the upper connecting beam 7 is fixedly connected with the top of the underground continuous wall, and the other end of the upper connecting beam is connected with the tops of the supporting piles through an elastic support 71; 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 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 62, the pressure detection device 61 is arranged on the steel cable, and the pressure detection device is installed in a mode of being tightly attached to the underground continuous wall.
The wallboard is big end down's trapezium structure, bottom plate lower part sets up protruding tooth 31.
And the top parts of the supporting piles and the underground continuous wall are provided with crown beams, and the upper connecting beam is connected to the crown beams of the underground continuous wall and the supporting piles. The supporting piles are arranged at equal intervals, and the supporting piles are connected through flexible parts.
In addition, the invention also comprises a construction method of the anti-floating flexible combined support of the foundation pit, 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 and 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 a bottom plate and a wall plate of the underground connecting 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 wall plate and penetrates through the support pile and penetrates into the foundation pit soil body to be not less than 15m; the middle pre-tightening device comprises a pressure detection device, a winding roller and a steel cable, the steel cable is arranged on the support pile through the steel cable Kong Maogu, when the underground water level rises, the pressure detection device firstly detects that the pressure is increased, if the pressure exceeds a preset value, the winding roller is loosened, so that the elastic support at the upper connecting beam is enabled to move upwards and finely adjusted when the underground continuous wall floats upwards, when the underground water level falls, the pressure detection device firstly detects that the pressure is reduced, if a safety value is reached, the winding roller is tightened, and at the moment, the elastic support returns under the action of the gravity of the underground continuous wall.
The above description is only for the preferred embodiment of the present invention, and is not intended to limit the present invention in any way. Any simple modification, equivalent change or modification made to the above embodiments according to the technical spirit of the present invention still falls within the scope of the technical solution of the present invention.
Claims (5)
1. The utility model provides a flexible combination of foundation ditch anti floating is strutted, includes fender pile, underground continuous wall, wallboard, bottom plate and flexible composite set, its characterized in that: the supporting piles and the underground continuous wall are arranged in the front and back direction, the underground continuous wall is arranged on the inner side of the foundation pit, the supporting piles are arranged on the rear side of the underground continuous wall, the bottom of the underground continuous wall faces the foundation pit and is internally provided with a bottom plate, wall plates are uniformly distributed on the vertical surface of the underground continuous wall and are perpendicular to the underground continuous wall, the flexible combination device is arranged between the supporting piles and the underground continuous wall, and the flexible combination device comprises a bottom anchor cable, a middle pre-tightening device and an upper connecting beam; the bottom anchor cable penetrates through the end face of the wall plate and penetrates through the support pile; the upper connecting beam is arranged at the tops of the underground continuous wall and the supporting piles, one end of the upper connecting beam is fixedly connected with the top of the underground continuous 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 supporting 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 installed in a mode of being tightly attached to the underground continuous wall.
2. The anti-floating flexible combined support for the foundation pit according to claim 1, wherein: the wallboard is big-end-up's trapezium structure, bottom plate lower part sets up the dogtooth.
3. The anti-floating flexible combined support for the foundation pit according to claim 1, wherein: and the top parts of the supporting piles and the underground continuous wall are provided with crown beams, and the upper connecting beam is connected to the crown beams of the underground continuous wall and the supporting piles.
4. The anti-floating flexible combined support for the foundation pit according to claim 1, wherein: the support piles are arranged at equal intervals, and the support piles are connected through flexible parts.
5. A construction method of an anti-floating flexible combined support for a foundation pit according to any one of claims 1 to 4, characterized in that: firstly constructing a support pile, constructing a steel cable mounting hole and a bottom anchor cable penetrating hole at a position corresponding to the support pile, then constructing an underground continuous wall, and connecting the underground continuous wall and 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 a bottom plate and a wall plate of the underground connecting 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 wall plate and penetrates through the support pile and penetrates into the foundation pit soil body to be not less than 15m; the middle pre-tightening device comprises a pressure detection device, a winding roller and a steel cable, the steel cable is arranged on the support pile through the steel cable Kong Maogu, when the underground water level rises, the pressure detection device firstly detects that the pressure is increased, if the pressure exceeds a preset value, the winding roller is loosened, so that the elastic support at the upper connecting beam is enabled to move upwards and finely adjusted when the underground continuous wall floats upwards, when the underground water level falls, the pressure detection device firstly detects that the pressure is reduced, if a safety value is reached, the winding roller is tightened, and at the moment, the elastic support returns under the action of the gravity 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 |
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| 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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| CN115233694A true CN115233694A (en) | 2022-10-25 |
| CN115233694B CN115233694B (en) | 2023-10-13 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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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 |
| CN209923941U (en) * | 2019-04-29 | 2020-01-10 | 江啸 | Building foundation pit supporting device |
| CN211498874U (en) * | 2019-12-27 | 2020-09-15 | 西北综合勘察设计研究院 | Foundation pit pile anchor supporting device |
| 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)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| 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 |
| CN209923941U (en) * | 2019-04-29 | 2020-01-10 | 江啸 | Building foundation pit supporting device |
| CN211498874U (en) * | 2019-12-27 | 2020-09-15 | 西北综合勘察设计研究院 | Foundation pit pile anchor supporting device |
| 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 |
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| CN115233694B (en) | 2023-10-13 |
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