A foundation pit support repair structure and its construction method

A technology for foundation pit support and repair structure, which is applied in foundation structure engineering, foundation structure repair, excavation, etc., can solve the problem of pile body displacement inclination, loss of foundation pit support row pile support effect, foundation pit support row Pile repair work is not easy and other problems, to achieve the effect of improving convenience

Active Publication Date: 2020-09-29
广东建基基础工程有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The above foundation pit support row piles are hollow cast-in-place concrete thin-walled pipe piles with built-in reinforcement cages. The length of the foundation pit support row piles is relatively long. When the pile body of the foundation pit support row piles cracks, although There is a steel cage in the pile body for support so that the pile body will not break, but it is easy to cause the pile body of the foundation pit support row pile to be displaced and tilted at the crack, and then lose the support effect of the foundation pit support row pile. Concrete filling and repairing at the cracks, because the outer wall of the pile is in contact with the wall of the foundation pit, so that it is very difficult to repair the foundation pit supporting and rowing piles from the outside, so there are certain improvements

Method used

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  • A foundation pit support repair structure and its construction method
  • A foundation pit support repair structure and its construction method
  • A foundation pit support repair structure and its construction method

Examples

Experimental program
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Effect test

Embodiment 1

[0040] The foundation pit support repair structure includes a repair expansion ring 2 , a repair frame 3 , an air bag body 4 and a grouting pipe 5 .

[0041] Specifically, combined with figure 2 and Image 6 As shown, the repair expansion ring 2 is used to be inserted into the foundation pit support row pile 1. The repair expansion ring 2 is made of curled stainless steel sheets. The flange 21 has certain elasticity so that the anti-loosening flange 21 can be compressed. Wherein the repair expansion ring 2 has two coiled ends 22, the repair expansion ring 2 is expanded or retracted, the two coiled ends 22 of the repair expansion ring 2 can move relative to each other, and the two coiled ends 22 of the repair expansion ring 2 At least two one-way locking mechanisms 6 are arranged between the ends 22. After the expansion ring 2 is expanded, the one-way locking mechanisms 6 are used to limit the retraction of the two rolled ends 22 of the expansion ring 2. Wherein, the outer ...

Embodiment 2

[0054] A construction method for applying the foundation pit support repair structure described in the above technical scheme, comprising the steps of:

[0055] S1, excavating the soil body in the foundation pit support row pile 1 to the position of the foundation pit support row pile 1 crack;

[0056] S2, install the repair frame 3 outside the repair expansion ring 2, put the repair expansion ring 2 into the pile row 1 of the foundation pit support, so as to align the cracks of the pile row 1 of the foundation pit support with the repair frame 3;

[0057] S3, put the airbag body 4 into the repair expansion ring 2 and inflate it, the expansion of the air bag body 4 drives the inner diameter of the repair expansion ring 2 to expand, so that the repair frame 3 is closely attached to the inner wall of the foundation pit support row pile 1 and surrounds the foundation Remove the airbag body 4 for the crack of the pit support row pile 1;

[0058] S4, through the grouting pipe 5, t...

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PUM

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Abstract

The invention discloses a foundation pit supporting and repairing structure. A repairing expansion ring is provided with two coiling ends, the two coiling ends of the repairing expansion ring can moverelative to each other, and at least two one-way locking mechanisms are arranged between the two coiling ends of the repairing expansion ring; the one-way locking mechanisms are used for limiting theretraction motions of the two coiling ends of the repairing expansion ring. A repairing frame comprises two mounting rubber rings which sleeve the repairing expansion ring and are arranged up and down, and a plurality of reinforcing steel bars are circumferentially arranged between the two mounting rubber rings at equal intervals; after an air bag body is inflated, the inner diameter of the repairing expansion ring can be driven to expand so that the mounting rubber rings can be tightly attached to the inner wall of a foundation pit support row pile, and the two mounting rubber rings, the outer wall of the repairing expansion ring and the inner wall of the foundation pit support row pile define a grouting space. A grouting pipe is used for introducing concrete slurry into the grouting space. The structure has the advantage of being high in foundation pit support row pile repairing convenience.

Description

technical field [0001] The invention relates to the technical field of building construction infrastructure equipment, in particular to a foundation pit support repair structure and a construction method thereof. Background technique [0002] With the rapid development of high-rise buildings, the foundation pit will become larger and deeper, and the construction of the support structure of the foundation pit will become more and more difficult. During the construction process, in order to ensure the construction of the underground structure and the deep foundation pit For the safety of the surrounding environment and the convenience of construction, it is necessary to take support and reinforcement measures for the side wall of the deep foundation pit and the surrounding environment. [0003] The notification number is CN103469798B Chinese patent discloses a foundation pit support structure, including foundation pit support row piles, water and soil stop curtain, and anti-si...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): E02D17/04E02D37/00
Inventor 陈刚崔裕忠王正军鲁松郭越黎沛辉
Owner 广东建基基础工程有限公司
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