Tunnel lining self waterproof drainage system

Abstract

The invention relates to a tunnel lining self waterproof drainage system, which comprises a surrounding rock bearing arch, a cast-in-place cement main waterproof layer, a pre-cast cement arch sheet layer and longitudinal drainage channels. Arch sheet layer construction gaps and cast-in-place cement main waterproof layer construction gaps are interlaced. The tunnel lining self waterproof drainage system is characterized in that movable drainage grooves are fixedly arranged below the pre-cast cement arch sheet layer of centralized bursting water seepage points of loose surrounding rocks, and form arch sheet drainage spaces with an inwards concave surface of the pre-cast cement arch sheet layer, the parallel drainage spaces distributed along the section of a tunnel form a movable drainage channel, the longitudinal drainage channels are communicated and are arranged on two sides of the movable drainage channel and the pavement of the tunnel, pre-embedded water guiding pipes are arranged at the centralized bursting water seepage points, a water outlet end of each pre-embedded water guiding pipe is arranged on the inwards concave surface of the pre-cast cement arch sheet layer, and pre-embedded grouting pipes are arranged outside the pre-embedded water guiding pipes. The invention completely solves stubborn problems of the tunnel on cracking, seeping, frost heaving, ponding or freezing and the like on the premise of not arranging an interlayer waterproof layer and a hidden seepage water blind pipe drainage system, and the tunnel lining self waterproof drainage system disclosed by the invention has a simple structure and is convenient to construct.

Description

technical field [0001] The invention belongs to the technical field of waterproofing and drainage of tunnels and underground projects, and is suitable for tunnels, roadways, tunnels, tunnels, underground arched workshops, urban subways, basements of high-rise buildings, etc. Engineering waterproof and drainage facilities, specifically a tunnel lining self-waterproof and drainage system. Background technique [0002] At present, composite lining waterproof and drainage systems are widely used at home and abroad. see Figure 8 : In terms of waterproofing; in addition to the primary waterproofing layer 8 of spray anchor support and the main waterproofing layer 2 of cast-in-place concrete, a concealed interlayer waterproofing layer 7 is added, that is, it is generally installed in the whole hole between the primary supporting and the secondary lining Waterproof board, middle waterproof layer of non-woven fabric. In fact, due to the uneven thickness of the shotcrete supported b...

AI Technical Summary

Problems solved by technology

Tunnel cracks, leakage, frost heave, water accumulation or icing will not only affect the lining and driving safety, but the humid environment will cause corrosion or short circuit of the equipment in the tunnel, which will reduce the service life of the equipment and affect the appearance of the tunnel

[0005] The current development trend is limited to improving the original system, such as using high-crack-resistant steel-brazed concrete or flexible fiber concrete to prevent cracks in the secondary lining; using chisels to remove the surface agglomeration of shotcrete, cutting off the base surface steel bars, pipe heads, etc. Methods such as sharp protrusions and mortar plastering the cover to prevent damage to the waterproof layer; measures such as using new materials and new techniques to improve the construction quality of the three joints to prevent leakage, etc. This method is limited to the waterproof and drainage professional to solve the problem of waterproof and drainage. Solve the problem of tunnel leakage

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