Leaking stoppage method for waterproof curtain

A technology of water-stop curtain and leak-stopping method, which is applied in construction, infrastructure engineering, sheet pile wall and other directions, can solve the problems of not being able to catch up with the speed of water scouring, unable to form solidified piles, and the effect is not ideal, and achieve low cost, Good effect, strength-enhancing effect

Inactive Publication Date: 2014-04-16
CHINA JINGYE ENG
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0002] In the prior art, the defect plugging method of the water-stop curtain of the foundation pit generally adopts mechanical geotechnical excavation to expose the leak point, and then plugs the leak. Construction is more difficult
In the prior art, high-pressure jet spraying is also used to repair the defects of water-stop curtains. However, due to the flow of groundwater, conventional high-pressure jet jetting piles are easily washed away by the water flow at the defects and cannot form solidified piles. The agent can't keep up with the speed of water scouring, and the effect is not ideal.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Foundation Pit Enclosure Project of Xiamen Yujing Center

[0027] The water-stop curtain is cast-in-situ piles plus rotary jetting piles between piles. Due to the partial lack of jetting piles, water and sand gushing occur in the foundation pit. The treatment method is: backfill the earthwork at the water leakage in the foundation pit, lead the hole to the defect, use the drill pipe on the machine, insert fiber cotton, fill the hole, and perform high-pressure rotary spraying on the defect through the high-pressure rotary nozzle to make the cement slurry and the defect The fiber cotton at the place is solidified in situ to form a reinforced swirl body to repair the defect. The water pressure of the high-pressure rotary spraying is ≥38MPa, the wind pressure is 0.7MPa, the slurry pressure is 2-3MPa, the rotation speed is 10r / min, the slurry flow rate is 100-150L / min, and the water-cement ratio of the cement slurry is 1.0 , the specific gravity is 1.5-1.6.

Embodiment 2

[0029] Quanzhou Seaview Garden Foundation Pit Enclosure Project

[0030] The water-stop curtain is cast-in-situ piles plus jet-spray piles between piles. Due to the vertical deviation of the jet-spout piles, the jet-spray piles cannot overlap with the cast-in-place piles, forming a vertical gap of 10cm to 40cm, and water gushes and sand gushes out of the foundation pit. The treatment method is: backfill the earthwork at the water leakage in the foundation pit, lead the hole to the defect, use the drill pipe on the machine, insert fiber cotton, fill the hole, and perform high-pressure rotary spraying on the defect through the high-pressure rotary nozzle to make the cement slurry and the defect The fiber cotton at the place is solidified in situ to form a reinforced swirl body to repair the defect. The water pressure of the high-pressure rotary spraying is ≥38MPa, the wind pressure is 0.7MPa, the slurry pressure is 2-3MPa, the rotation speed is 10r / min, the slurry flow rate is 1...

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PUM

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Abstract

The invention discloses a leaking stoppage method for a waterproof curtain. The method comprises the following steps of (1) drilling a hole in the upper portion of a defect of the waterproof curtain until reaching the defect, (2) stuffing soft ribs into the defect from the drilled hole in the upper portion of the defect until the soft ribs can not be stuffed any more, (3) placing a high-pressure rotary spraying pipe into the drilled hole until reaching the defect, (4) conducting high-pressure rotary spraying on the defect through the high-pressure rotary spraying pipe, and enabling cement paste and the soft ribs at the defect to be solidified in situ to form a reinforced rotary spraying body so as to repair the defect. The soft ribs used in the method play a role in reinforcing, the influence of water flows on forming and solidifying of a pile body can be effectively removed, and the pile body can be kept complete.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to a leak-stopping method for a water-stop curtain. Background technique [0002] In the prior art, the defect plugging method of the water-stop curtain of the foundation pit generally adopts mechanical geotechnical excavation to expose the leak point, and then plugs the leak. Construction is more difficult. In the prior art, high-pressure jet spraying is also used to repair the defects of water-stop curtains. However, due to the flow of groundwater, conventional high-pressure jet jetting piles are easily washed away by the water flow at the defects and cannot form solidified piles. The agent can't catch up with the speed of water scour, and the effect is not very satisfactory. Contents of the invention [0003] The purpose of the present invention is to overcome the defects of the prior art and provide a method for plugging water-tight curtains. [0004] ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E02D5/18E02D19/18
Inventor 马德强陈云彬
Owner CHINA JINGYE ENG
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