CN111910647B - Opposite-pulling type foundation pit supporting device - Google Patents
Opposite-pulling type foundation pit supporting device Download PDFInfo
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- CN111910647B CN111910647B CN202010840953.4A CN202010840953A CN111910647B CN 111910647 B CN111910647 B CN 111910647B CN 202010840953 A CN202010840953 A CN 202010840953A CN 111910647 B CN111910647 B CN 111910647B
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- foundation pit
- supporting device
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- cable
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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
- E02D5/00—Bulkheads, piles, or other structural elements specially adapted to foundation engineering
- E02D5/74—Means for anchoring structural elements or bulkheads
- E02D5/76—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor
- E02D5/765—Anchorings for bulkheads or sections thereof in as much as specially adapted therefor removable
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- Structural Engineering (AREA)
- Mining & Mineral Resources (AREA)
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- Civil Engineering (AREA)
- General Engineering & Computer Science (AREA)
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Abstract
The invention relates to the technical field of foundation pits, in particular to a counter-pull type foundation pit supporting device. The utility model provides a to drawing formula underground structure supporting device, includes envelope, still includes: the anchor cable control integrated device comprises an anchoring device anchored on the inner side of the enclosure structure, a cable connected with the anchoring device, a transverse support supported above the enclosure structure, a central controller arranged on the transverse support and an anchor cable control integrated device formed by a displacement monitoring device arranged on the anchoring device, wherein the central controller is connected with the cables on two sides, receives data sent by the displacement monitoring device, evaluates the deformation condition of a foundation pit and automatically adjusts the axial force of the cable. The enclosure structure is composed of underground continuous walls. The invention can realize intelligent adjustment of the prestress of the supporting structure; the foundation pit construction efficiency is greatly improved; the regional adaptability is good.
Description
Technical Field
The invention relates to the technical field of foundation pits, in particular to a counter-pull type foundation pit supporting device.
Background
With the development of infrastructure construction in China, large, long and deep foundation pits emerge continuously, and in order to keep the foundation pits stable, a supporting structure is usually adopted in the foundation pit construction, so that supporting force is effectively provided for the foundation pits, and unbalanced force of the foundation pits is reduced. Common supporting structures comprise steel supports, anchor pulling type supports and the like, wherein the steel supports have the defects of prestress attenuation, easiness in falling, complexity in mounting and dismounting and the like, and safety accidents such as foundation pit collapse are easily caused; the anchor pulling type support has low adaptability, is difficult to use for soft soil due to insufficient anchoring force and the like, and cannot be applied when underground cables, pipelines, foundations around the pipelines, basements and other obstacles exist.
The above is the deficiency of the prior art.
Disclosure of Invention
Aiming at the defects of the prior art, the invention aims to provide a convenient, quick, accurate and practical counter-pulling type foundation pit supporting device which can realize intelligent adjustment of prestress of a supporting structure.
The technical scheme of the invention is as follows: the utility model provides a to drawing formula underground structure supporting device, includes envelope, characterized by still includes: the anchor cable control integrated device comprises an anchoring device anchored on the inner side of the enclosure structure, a cable connected with the anchoring device, a transverse support supported above the enclosure structure, a central controller arranged on the transverse support and an anchor cable control integrated device formed by a displacement monitoring device arranged on the anchoring device, wherein the central controller is connected with the cables on two sides, receives data sent by the displacement monitoring device, evaluates the deformation condition of the foundation pit and automatically adjusts the axial force of the cable.
The enclosure structure is composed of underground continuous walls.
The concrete cross brace is used for guaranteeing the integral stability of the envelope structure.
The underground continuous wall is formed by alternately arranging rectangular underground continuous walls and T-shaped underground continuous walls, vertical pipelines are arranged on the outer convex parts of the T-shaped underground continuous walls and communicated with a plurality of transverse pipelines, pulleys are arranged at the joint of the vertical pipelines and the transverse pipelines, and the stay cable passes through the transverse support, the vertical pipelines, the pulleys and the transverse pipelines and is connected with the anchoring device.
The pipe is a PVC pipe.
The displacement monitoring device is composed of a high-precision displacement sensor.
The transverse bracket is made of high-strength alloy material.
Due to the adoption of the technical scheme, the invention has the following beneficial effects:
(1) the invention provides a counter-pull type foundation pit supporting system, which is based on a wireless sensor and a modern network communication technology, automatically monitors the foundation pit transverse displacement, transmits data to a central control device, evaluates the foundation pit deformation condition based on the displacement data to be measured by the central control device, and timely adjusts the supporting shaft force; meanwhile, the foundation pit transverse displacement and the supporting shaft force condition are fed back to relevant technicians, so that the technicians can conveniently acquire foundation pit data in real time without watching, the detailed condition of foundation pit support is guaranteed to be mastered in real time, and information-based construction is realized. And when the enclosure structure is seriously deformed, pre-alarming is carried out so that field construction personnel can take reinforcement measures in time and safety accidents caused by overlarge deformation of the foundation pit are avoided.
(2) The invention is based on the counter-pull type foundation pit supporting system, adopts a self-anchoring force transmission mode, can effectively overcome the soil layer limitation of a pull-anchor type supporting structure, and can be used in areas with poor soil property.
(3) The guy cable can be recycled, after the construction of the structure in the foundation pit is completed, the anchoring devices can be sequentially disassembled, and finally the guy cable can be recycled by using the central control device, so that the construction cost is reduced.
(4) And no built-in steel support is arranged. The dependence of the traditional foundation pit on the built-in steel support is eliminated through the stay cable, the construction period is effectively shortened, and the construction cost is reduced.
Drawings
Fig. 1 is a plan view of a supporting device for a foundation pit of the present invention.
Fig. 2 is a right side view of the supporting device of the foundation pit of the present invention.
In the figure: the method comprises the following steps of 1-concrete cross brace, 2-rectangular underground diaphragm wall, 3-T-shaped underground diaphragm wall, 4-guy cable, 5-anchoring device, 6-PVC pipeline, 7-pulley, 8-anchor cable control integrated device, 9-central control device, 10-transverse support, 11-displacement monitoring device and 12-pit bottom.
Detailed Description
The present invention will now be described in further detail with reference to the accompanying drawings and examples. The supporting device of the foundation pit is obtained by a construction method, so the supporting device can be obtained by describing the construction method.
First, a building enclosure is constructed, and although the building enclosure of the foundation pit is exemplified by an underground continuous wall, the building enclosure is not limited to the underground continuous wall.
As shown in fig. 1 and 2, the rectangular underground diaphragm wall 2 may be constructed as a normal underground diaphragm wall. The T-shaped underground continuous wall 3 is a conventional underground continuous wall structure with the middle part protruding outwards and two ends protruding outwards, and meanwhile, the T-shaped enclosure structure can improve the deformation resistance of a foundation pit. And a PVC pipeline 6, a pulley block 7 and a pull cable 4 are arranged in the convex part. The pulley block is firmly connected to the corner of the PVC pipeline through a steel pulley with good wear resistance and is used for changing the direction of the inhaul cable. The inhaul cable is composed of a plurality of strands of steel strands, has the characteristics of high strength and strong deformation resistance, is used for transmitting prestress to the anchoring device, and can be recycled after all structural constructions are completed.
Then, the rectangular underground continuous walls 2 and the T-shaped underground continuous walls 3 are arranged in an equally spaced and staggered manner, and the concrete wales 1 are constructed at certain intervals.
Secondly, the enclosure structure is connected with an anchor cable control integrated device 8, the anchor cable control integrated device 8 comprises a central control device 9, a transverse support 10 and a displacement monitoring device 11, and the central control device 9 is used for stretching the stay cable 4 and providing prestress for the stay cable 4; the transverse bracket 10 is used for guiding the inhaul cable 4 and transmitting axial force; the displacement monitoring device 11 is used for measuring the transverse displacement of the underground continuous wall and sending displacement data to the central control device 9.
As shown in fig. 1 and 2, an anchoring device 5 is installed, the tail end of the guy cable can be anchored during foundation pit construction, the guy cable can be released after the foundation pit construction is completed so as to be recycled, and the tail end of the guy cable is anchored on the inner side of the underground continuous wall; the anchoring device comprises the following functions: 1) anchoring the inhaul cable; 2) providing a supporting force for the foundation pit support structure; 3) and loosening the guy cable after the construction of the structure in the foundation pit is completed so as to withdraw the guy cable.
And installing a transverse bracket 10, wherein the transverse bracket is supported above the underground diaphragm wall, is made of high-strength alloy materials, has good pressure resistance, is used for forming a main body structure of the anchor cable control integrated device and guiding the inhaul cables on two sides to the central control device. As shown in fig. 1 and 2, the transverse bracket 10 guides the cable 4 in the PVC pipe 6 and connects the cables on both sides through the central control device 9.
And the central control device 9 is used for receiving the data of the displacement monitoring device 1, automatically adjusting the axial force value of the stay cable 4 according to the deformation condition of the foundation pit, and recovering the stay cable after the construction is finished. An initial prestress can be applied by the central control 9.
The displacement monitoring device 1 consists of high-precision displacement sensors, is arranged at a certain distance above each anchoring device, is used for monitoring the transverse deformation of the underground diaphragm wall in real time, and sends displacement data to the central control device.
And then, excavating the foundation pit. As shown in fig. 1 and 2, excavating layer by layer, and acquiring displacement data in real time through displacement monitoring devices 11 above each anchoring device 5 and feeding the displacement data back to a central control device 9; the central control device 9 automatically adjusts the axial force on the cable 4 based on the displacement data.
And finally, constructing the structure. As shown in fig. 1 and 2, after a foundation pit is excavated to a pit bottom 12, the construction of the structure in the pit is performed, after the construction reaches a specified height, the anchoring device 5 is loosened, the guy cable 4 is recovered, and finally, the anchor cable control integrated device 8 is removed after the construction is completed.
The previous description of the disclosed embodiments is provided to enable any person skilled in the art to make or use the present invention. It will be readily apparent to those skilled in the art that various modifications to these embodiments may be made, and the generic principles described herein may be applied to other embodiments without the use of the inventive faculty. Therefore, the present invention is not limited to the embodiments described herein, and those skilled in the art should make improvements and modifications within the scope of the present invention based on the disclosure of the present invention.
Claims (7)
1. The utility model provides a to drawing formula underground structure supporting device, includes envelope, characterized by still includes: the anchor cable control integrated device comprises an anchoring device anchored on the inner side of the enclosure structure, a cable connected with the anchoring device, a transverse support supported above the enclosure structure, a central controller arranged on the transverse support and an anchor cable control integrated device formed by a displacement monitoring device arranged on the anchoring device, wherein the central controller is connected with the cables on two sides, receives data sent by the displacement monitoring device, evaluates the deformation condition of a foundation pit and automatically adjusts the axial force of the cable.
2. The counter-pulling type foundation pit supporting device according to claim 1, wherein: the enclosure structure is composed of underground continuous walls.
3. The counter-pulling type foundation pit supporting device according to claim 2, wherein: the concrete cross brace is used for guaranteeing the integral stability of the envelope structure.
4. A counter-pulling excavation supporting device as claimed in claim 3, wherein: the underground continuous wall is formed by alternately arranging rectangular underground continuous walls and T-shaped underground continuous walls, vertical pipelines are distributed on the outer convex parts of the T-shaped underground continuous walls and communicated with a plurality of transverse pipelines, pulleys are arranged at the joint of the vertical pipelines and the transverse pipelines, and the stay cable is connected with the anchoring device through the transverse support, the vertical pipelines, the pulleys and the transverse pipelines.
5. The counter-pulling type foundation pit supporting device according to claim 4, wherein: the pipe is a PVC pipe.
6. The counter-pulling type foundation pit supporting device according to any one of claims 1 to 5, wherein: the displacement monitoring device is composed of a high-precision displacement sensor.
7. The counter-pulling type foundation pit supporting device according to any one of claims 1 to 5, wherein: the transverse bracket is made of high-strength alloy material.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010840953.4A CN111910647B (en) | 2020-08-20 | 2020-08-20 | Opposite-pulling type foundation pit supporting device |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010840953.4A CN111910647B (en) | 2020-08-20 | 2020-08-20 | Opposite-pulling type foundation pit supporting device |
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| Publication Number | Publication Date |
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| CN111910647A CN111910647A (en) | 2020-11-10 |
| CN111910647B true CN111910647B (en) | 2021-06-01 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN114280061B (en) * | 2021-12-27 | 2022-10-14 | 交通运输部公路科学研究所 | Observation method for technical conditions of cable-stayed bridge cable beam anchoring area and monitoring window |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN105155548B (en) * | 2015-06-02 | 2018-05-22 | 谢纯 | A kind of drag-line double-row pile (wall) supporting construction |
| CN204780938U (en) * | 2015-06-12 | 2015-11-18 | 唐孟雄 | Novel recoverable anchor formula double row pile supporting construction that draws |
| CN107524152A (en) * | 2017-10-13 | 2017-12-29 | 中建八局第三建设有限公司 | A kind of foundation pit enclosure structure stress bringing device and its construction method |
| CN107882041A (en) * | 2017-12-14 | 2018-04-06 | 上海天演建筑物移位工程股份有限公司 | Pattern foundation pit supporting structure intelligence support meanss and method |
| CN108088410A (en) * | 2017-12-26 | 2018-05-29 | 上海建工集团股份有限公司 | Underground enclosure wall integration deformation monitoring system and monitoring method |
| CN108385695A (en) * | 2018-05-02 | 2018-08-10 | 张家港江苏科技大学产业技术研究院 | Foundation pit supporting construction and its construction method |
| KR101993609B1 (en) * | 2018-05-30 | 2019-07-19 | 주식회사 에스앤아이코퍼레이션 | Earth retaining structure using concrete block for the anchorage of anchor pc-strands and construction method thereof |
| CN110578329A (en) * | 2019-08-26 | 2019-12-17 | 天津大学 | device and method for controlling tunnel deformation by using cable anchors and ground anchoring beams |
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