Construction method of a tunnel waterproof system

Abstract

The invention discloses a construction method for a waterproof system of a tunnel, and is characterized by comprising the following steps: a surface treatment step, that is to say, processing an inner wall part of the tunnel, which requires water tightness so as to form a smooth coarse hair surface; a rigid sealing step, that is to say, after the surface treatment step, completely covering a congealable self-repairing water repellent on the coarse hair surface to obtain a complete continuous rigid waterproof membrane; a flexible sealing step, that is to say, after the rigid sealing step, covering a flexible waterproof membrane on the surface of the rigid waterproof membrane; and an outer lining step, that is to say, generating an outer lining layer in the step, wherein the flexible waterproof membrane is shielded by the outer lining layer, and the outer lining layer is located on the surface wall at the innermost layer of the tunnel. According to the invention, a composite waterproof interlayer is formed by a rigid waterproof layer and a flexible waterproof layer, so that the construction method has the advantages of high-intensity leakage-proof function, ability of deformation resistance, no additional installation components, no puncture risk, good protection effect, stability and mechanical intensity, and good reliability.

Description

technical field [0001] The invention relates to a construction method of a waterproof system in tunnel construction. Background technique [0002] The construction environment of the tunnel is often characterized by humidity, dripping water, and poor ventilation, and because the tunnel penetrates a large number of surface structures and destroys the original groundwater leakage path, during the construction process and actual use, the tunnel surrounding rock It can be said that the inner wall leaks nine times out of ten. Waterproof treatment and various waterproof systems installed during tunnel construction are already an inevitable part of this type of product. [0003] Usually, when a leak occurs in a tunnel, the water pressure is relatively high. Most of the existing typical tunnel waterproofing systems to prevent leakage use the form of waterproof boards. During the primary or secondary lining, the waterproof boards are laid on the surrounding rocks to make As a waterp...

AI Technical Summary

Problems solved by technology

The cost of this form is easy to control, and the release method is relatively mature, but it has many defects. First, there are always lap joints in the waterproof board. With the occurrence of construction errors, the possibility of leakage from the lap joints is greater; One is that the waterproof board itself is easy to be punctured. The actual situation that often happens is that the punctured part of the waterproof board cannot resist leakage, so that the self-waterproof function of the two ends of the secondary lining will finally undertake the anti-leakage function. Therefore, the entire waterproof system The aging speed is fast, and the reliability is obviously not high; in particular, the anti-leakage effect must be inspected after the completion of the secondary lining, which does not have the characteristics of instant inspection, and its repair rate is high, and the damage caused by remediation is very large

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