Grouting repairing method of water stopping curtain

Abstract

The invention discloses a grouting repairing method of a water stopping curtain, which comprises the following steps of: (1) measuring and labeling grouting holes, wherein the grouting holes are divided into two sequences, namely a sequence I and a sequence II, the holes of the sequence I and the holes of the sequence II are arranged transversely at equal intervals, and the holes of the sequence I and the holes of the sequence II are arranged longitudinally in rows at equal intervals; (2) grouting the holes of the sequence I: firstly drilling the holes of the sequence I, inserting shock tubes to the holes of the sequence I, then closing the holes of the sequence I and grouting by sections, and finally cleaning the tubes for later use; and (3) grouting the holes of the sequence II: firstly drilling the holes of the sequence II, inserting shock tubes to the holes of the sequence II, then closing the holes of the sequence II and grouting, and finally cleaning the tubes for later use. By the method, grouting is conducted by holes of two sequences according to the principle of grouting at intervals and densifying by sequences; the holes of the sequence I are grouted to fill the holes of the soil layer; the holes of the sequence II are grouted to crack the stratum and form a seepage-proofing curtain in the stratum; and the finally repaired curtain can effectively reduce the displacement of a foundation pit, the underground erosion of the stratum around the foundation pit, and settlement of the foundation and buildings.

Description

technical field [0001] The invention relates to a water-stop curtain repair technology. Background technique [0002] The design and construction of deep foundation pit support is a hot and difficult point in the current high-rise building foundation engineering. In the design and construction of foundation pit support, the design and construction of heavy retaining structures and the design and construction of light water-stop curtains are more common. Improper selection of water-stopping scheme, arbitrary modification of the original design scheme during actual construction, insufficient understanding of complex underground conditions, poor consideration, improper construction technology, wrong selection of construction technical parameters, etc., will cause failure of the water-stop curtain and cause accidents. In the slightest, it will cause heavy economic losses and delays in the construction period, and in the worst case, it may cause casualties and adverse social imp...

AI Technical Summary

Problems solved by technology

Improper selection of water-stopping scheme, random modification of the original design scheme during actual construction, insufficient understanding of complex underground conditions, poor consideration, improper construction technology, wrong selection of construction technical parameters, etc., will cause failure of the water-stop curtain and cause accidents. In the slightest, it may cause major economic losses and delays in the construction period, and in severe cases, it may cause casualties and adverse social impacts

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