Vibration disturbance resistant crack leaking stoppage and reinforcement method applied to underground works

Abstract

The invention discloses a vibration disturbance resistant crack leaking stoppage and reinforcement method applied to underground works. The method comprises the steps as follows: the surface of a crack is cleaned, and holes are drilled with a drilling tool crosswise along two sides of the crack and purged and washed clean; grouting nipples are mounted in the drilled holes and screwed tightly, epoxy resin grout is poured into the grouting nipples, and pouring is repeated several times for grout supplement and is stopped until the pouring pressure change is gentle; the exposed grouting nipples are removed when the fact that epoxy resin is completely cured is confirmed after pouring, and the overflow cured grout is cleaned; a V-shaped groove is opened along the crack and is cleaned, coated with an interfacial agent and filled with a sealing adhesive, surfaces of two sides of the crack are cleaned, and then an acrylic acid resin elastic coating is painted. With the adoption of the processing manner, damage to a waterproof layer due to drilling can be restored, the problems of water channeling and damage to the waterproof layer can also be effectively solved, and the problem of crack leakage is effectively solved.

Description

technical field [0001] The invention relates to the technical field of crack plugging, in particular to a plugging and reinforcement method for anti-vibration disturbance cracks in underground engineering. Background technique [0002] At present, in underground projects such as tunnels and subways, some cracks often appear, such as construction joints, construction cold joints, fracture cracks, temperature shrinkage cracks, and structural cracks. These cracks often cause water leakage and other problems in rainy days and special circumstances. The reasons are as follows: [0003] 1) The mud and sand on the longitudinal horizontal construction joint surface of the structural concrete of the underground passage and subway station are not cleaned cleanly; [0004] 2) The longitudinal and horizontal construction joints are not thoroughly chiseled, and the accumulated water has not been drained; [0005] 3) The steel plate waterstop at the construction joint is not centered or...

AI Technical Summary

Problems solved by technology

[0003] 1) The mud and sand on the longitudinal horizontal construction joint surface of the structural concrete of the underground passage and subway station are not cleaned cleanly;

[0004] 2) The longitudinal and horizontal construction joints are not thoroughly chiseled, and the accumulated water has not been drained;

[0005] 3) The steel plate waterstop at the construction joint is not centered or the joint welding is defective;

[0006] 4) The grout leaks or the vibration is not dense during the construction joint concrete pouring;

[0007] 5) Waterstops in construction joints of cast-in-place linings in underground passages and subway stations are not properly installed, and vibrations cause waterstops to shift;

[0008] 6) Concrete defects on the structural surface: ① due to improper tamping method or formwork quality defects, etc., resulting in insufficient concrete pouring; ② large-volume concrete pouring, temperature shrinkage cracks; ③ winter construction, cracks caused by large temperature differences, ④ material grade ⑤Shallow cracks caused by inappropriate timing of surface closure; ⑥Cracks caused by normal settlement during the structural stability period; ⑦Cracks caused by other geological reasons

[0009] At present, there are many ways to deal with cracks, but these ways will also cause structural cracks due to various reasons, such as improper use of materials (poor quality of raw materials, unreasonable ratio), defects in construction quality (early demolition, untimely maintenance) , Concrete segregation), adverse effects of the external environment (temperature, humidity) and other factors may cause concrete cracks

Images