Targeted plugging construction method suitable for defects in underwater anti-seepage system

Abstract

The invention discloses a targeted leaking stoppage construction method suitable for a defect of an underwater seepage-proofing system. The targeted leaking stoppage construction method comprises thefollowing steps that S1, preparing an oily polyurethane grouting material; S2, determining a leakage area; S3, arranging a grouting pipe; and S4, conducting grouting. The water pressure of the upstream side of the seepage-proofing system is greater than the reaction internal pressure of grouting material polymerization, the polymerization reaction speed is slow, and the grouting material flows toa position of a defect (6) of the seepage-proofing system (5) in a targeted manner along with the water flow of an upstream leakage channel (4), after the grouting material penetrates through the defect (6), the water pressure is instantaneously reduced, the polymerization reaction on the downstream side is intensified, and curing foam generated by rapid foaming blocks the defect of the seepage-proofing system defect. According to the method, the specific position of the defect in the seepage-proofing system does not need to be found, the grouting material can automatically enter the defect along with water flow, curing foam is gradually generated on the downstream side of the defect to complete plugging, and targeted plugging is achieved. The method is particularly suitable for targeted leaking stoppage construction of a seepage-proofing system which is long in seepage path and invisible in defect position.

Description

technical field [0001] The invention relates to a leak-remediation technology for defects in an anti-seepage system, in particular to a targeted leak-stopping construction method suitable for defects in an underwater anti-seepage system. Background technique [0002] With the vigorous advancement of national water conservancy projects, many concrete dams and underground anti-seepage projects have been built in my country. Due to many reasons, when the water level reaches a certain level, water leakage from concrete dams and underground anti-seepage works occurs from time to time, which not only affects normal production, but also seriously threatens the operation safety of dams and underground works. [0003] Chinese patent CN104846784B discloses a treatment method for rapid closure of top water when the expansion joint of a gravity dam fails to stop the water. It adopts auxiliary seepage reduction measures, puts chemical grouting pipes and concrete grouting pipes, and injec...

AI Technical Summary

Problems solved by technology

This method can solve the problem of water leakage in concrete construction joints caused by uneven settlement of the foundation, but it also deals with surface defects, and the construction joints must be positioned first, so it cannot be applied to the plugging construction of hidden anti-seepage systems

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