Drainage prevention combined self-adhesion waterproof plate for mining method underground tunnel and construction method of drainage prevention combined self-adhesion waterproof plate

Abstract

The invention discloses a drainage prevention combined self-adhesion waterproof plate for a mining method underground tunnel. The drainage prevention combined self-adhesion waterproof plate comprisesa hook-and-loop fastener band, a drainage layer formed by multiple convex points, an HDPE waterproof plate layer, a macromolecule hot-melt pressure-sensitive adhesive layer and an anti-adhesion coating. The invention further provides a construction method of the drainage prevention combined self-adhesion waterproof plate. The waterproof plate can guide drainage, and unsmooth drainage of surrounding rock water or scouring to anchoring and shotcreting concrete is avoided. In addition, the waterproof plate can sufficiently adhere to secondary lining concrete, water channeling is avoided, the secondary lining concrete is sufficiently protected while the hidden danger of leakage is greatly reduced, the service life of the tunnel is prolonged, and the driving safety is greatly improved; and dueto the fact that the drainage effect is good, circumferential and longitudinal drainage blind pipes in a conventional method can be omitted, the construction period can be shortened, and the manufacturing cost can be reduced.

Description

technical field [0001] The invention relates to the technical field of waterproof materials, in particular to an anti-drainage combined self-adhesive waterproof board for tunnels excavated by mining methods and a construction method thereof. Background technique [0002] my country is a mountainous country, and 2 / 3 of the country's land area is mountainous. With the construction of a large number of highways, railways, subways and other engineering projects, it is inevitable to go through mountains and land. Due to its mature technology and The requirements for construction equipment are simple, the excavation section is large, and the construction precision is high, so it is widely used in engineering at present. At present, the waterproof system of mining tunnels is mainly composed of surrounding rock advanced small conduit grouting, anchor shotcrete primary lining, plastic waterproof board and drainage blind pipe. [0003] The surrounding rock’s advanced small conduit gro...

AI Technical Summary

Problems solved by technology

However, from the actual effect, since the waterproof board cannot play the role of guiding the water in the surrounding rock, if the drainage board is squeezed partly and the anchor shotcrete fits to wrap the water, the water will not drain out, which will easily cause leakage in the tunnel, while If there is a large gap between the waterproof board and the anchor shotcrete, the surrounding rock water will directly drain down and scour the concrete wall, resulting in premature deterioration of the concrete, not only serious leakage, but also a great hazard to the driving safety of the entire tunnel

And if there is sediment in the surrounding rock water, if it is directly vented, the blind drainage pipe will be blocked, the drainage capacity will be lost, and the leakage problem will be aggravated

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