The sealing method of the water leakage point in the water cut-off curtain of the foundation pit

Abstract

The invention relates to a water leakage point blockage method in a foundation pit water stop curtain. The method comprises the following steps: back-pressure sand bags are stacked in a water leakage point in a foundation pit near the water stop curtain, and are used for blocking the water leakage point; a first grouting pipe is drilled in soil near the water stop curtain, and first grouting slurry is filled to block a recess area in the soil corresponding to the water leakage point until the first grouting slurry cannot be filled; a second grouting pipe is drilled near the first grouting pipe, and second grouting slurry is filled in a gap formed by the first grouting slurry; and the back-pressure sand bags are removed, and steel plate piles are driven in the foundation pit near the water leakage point of the water stop curtain, are bonded on the surface of the water stop curtain, and are fixedly connected with the water stop curtain. The combination of construction measures preferably solves the blockage problem of the water leakage point, is short in construction time, and cannot influence the construction progress.

Description

technical field [0001] The invention relates to the technical field of structural engineering, in particular to a method for plugging water leakage points in a water-cutting curtain for foundation pits. Background technique [0002] With the shortage of urban land resources and technological innovation, the development of underground space has received more and more attention and development, and a large number of ultra-deep underground space structures have emerged, and deep foundation pit engineering has emerged as the times require. When the foundation pit project is rich in groundwater and the water level is high, the closed dewatering technology is generally used to solve the construction problems. The water interception curtain used for the closed dewatering usually has an underground diaphragm wall or an occlusal pile. Different geological conditions and other differences will cause various water leakage problems. Larger water leakage will lead to the inability of con...

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Problems solved by technology

[0003] The purpose of the present invention is to overcome the defects of the prior art, provide a method for plugging the leakage point in the water cut-off curtain of the foundation pit, and solve the waste of grout, the difficulty of plugging, and the construction time in the grouting method of the lead hole in the prior art. long and affect the construction progress and other issues

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