Waterproof board, draining board or waterproof and draining board and production method thereof

Abstract

The invention belongs to the technical field of waterproof materials for buildings and discloses a waterproof board, a draining board or a waterproof and draining board used between a primary tunnel support and a secondary lining. According to the technical scheme, the waterproof board, the draining board or the waterproof and draining board comprises a plurality of convex shells and plastic base plates connected between adjacent convex shells, and the convex shells and the plastic base plates are integrated. The waterproof board, the draining board or the waterproof and draining board is characterized in that each convex shell is semispherical, and the joint of each base plate and the corresponding convex shell is arc-shaped or of a chamfer structure; the base plates and the semispherical convex shells are made of linear low-density polyethylene, polyethylene, high-density polyethylene, toughening agent, antioxidant and metal deactivator. By the waterproof board, the draining board or the waterproof and draining board with improved mechanical performance, the problems that stress concentration occurs at the joints of the convex shells and the plastic base plates and concrete arranged in the convex shells is uncompacted are solved, and the problem that consideration cannot be given to both the extension property and the pressure resistance of the draining board is solved.

Description

technical field [0001] The invention relates to railway tunnels, highway tunnels and municipal tunnels, in particular to a waterproof board, drainage board or waterproof board used between the primary support and secondary lining of the tunnel and a preparation method thereof. Background technique [0002] Tunnels, especially railway tunnels with complex geological conditions, are constructed in accordance with the principle of "combining prevention, drainage, interception and blocking, adapting measures to local conditions and comprehensive treatment". On the one hand, in order to meet the waterproof requirements of the tunnel function, waterproof boards are laid between the primary support of the tunnel and the secondary lining; at the same time, to drain the groundwater behind the secondary lining, avoid or reduce the adverse effect of water pressure on the lining structure, generally Drainage boards are laid between the primary support of the tunnel and the secondary lin...

AI Technical Summary

Problems solved by technology

The main problems in the use of the drainage board structure are: first, when the drainage board is pulled, the right-angle joint between the convex shell and the plastic substrate is prone to stress concentration, which leads to the fracture of the joint; second, in the concrete During the pouring process, the right-angle joint is not conducive to the flow of concrete, and the problem of insufficient concrete filling in the convex shell is prone to occur. The convex shell is easily deformed by the extrusion of the initial support, which reduces the cross-sectional size of the drainage channel, which in turn affects the drainage of the drainage board. ability and increase the water pressure behind the secondary lining, increasing the safety risk of the structure

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