A tunnel waterproof board, a welding method between waterproof boards, and a hot-melt welding machine

Abstract

The invention discloses a tunnel waterproof board, a waterproof board welding method and a hot-melt welding machine. In waterproof board interannular overlap joint zones, the front surfaces and / or the back surfaces of the waterproof boards are provided with melt seal welding belts. The distribution direction of the melt seal welding belts is the same as the direction of welding seams of the interannular overlap joint zones. The melting point of a material of the melt seal welding belts is lower than that of a material of the waterproof boards. During welding, a group of extrusion idler wheels are added into the welding machine; at the same time of subjecting the waterproof boards to hot-melt welding or after the hot-melt welding, a heating mechanism of the welding machine heats the melt seal welding belts to melt the melt seal welding belts into a plastic flow state on the waterproof board; the added extrusion idler wheels of the welding machine extrude the melt seal welding belts in the plastic flow state to spread the melt seal welding belts in the plastic flow state to welding seam zones so as to achieve leak repairing and reinforcement of the welding seams and to form continuous and uniform welding seams on the original positions of the melt seal welding belts. Defects of a climb welding technology in tunnel construction are made up, and waterproof construction techniques, equipment levels and waterproof construction quality are improved.

Description

technical field [0001] The invention relates to a waterproof board for railways, highways, water conservancy and other tunnels. The waterproof board can effectively realize welding sealing and ensure welding quality. The present invention also relates to this welding method between flashing panels and the hot-melt welding machine used in this welding method. Background technique [0002] For railway tunnels, highway tunnels, and water conservancy tunnels, most of the waterproof board rings use hot-melt crawling mobile welding machines to weld two adjacent waterproof boards. The waterproof boards are divided according to functional areas. The area where two adjacent waterproof boards overlap is called the ring. The overlapping area or overlapping area, the width of the overlapping area is generally 10-15 cm. In the current welding process, two parallel hot-melt pressure welding seams are formed in the center of the overlapping area, and the width of the welding seams is gene...

AI Technical Summary

Problems solved by technology

Climbing welding machine welding is more reliable in the field of forward plane welding, such as landfills, pool waterproof layers, and drinking water projects. However, when it is applied to reverse welding of tunnel waterproof panels, since the tunnel outline is an arc-shaped structure, in order to maintain waterproof The slab is closely attached to the initial support layer of the tunnel, and sag needs to be reserved, so that the waterproof board is in a loose state. During the heating and welding process of the tunnel waterproof board, due to the inaccurate assembly position, there is still water, dust, and mechanical movement in the tunnel. Influenced by factors such as speed, the heating uniformity of the plate surface in the welding area is difficult to achieve the consistency of the melting temperature simultaneously. Excessive heating will cause excessive melting of the waterproof plate and damage the strength of the material body, making it difficult to effectively form a solid and continuous bridging welding area , the welding effect is limited by the construction conditions, which is one of the main sources of damage to tunnel water leakage

Images