Tunnel lining joint waterproof sealing gasket easy to compress

Abstract

The invention discloses an easy-to-compress tunnel lining joint waterproof sealing gasket which comprises a sealing gasket body arranged in a waterproof groove, and the sealing gasket body is provided with a mounting end capable of being embedded into the waterproof groove of a shield segment and an extrusion end capable of being matched with a sealing gasket body of another shield segment for extrusion. Through holes are formed in the waterproof sealing gasket in a bilateral symmetry mode with the center axis of the cross section as the center axis, and the through holes can be convex-like through holes, inverted convex-like through holes, half convex-like through holes, round through holes and inverted-U-shaped through holes. The waterproof sealing gasket is sequentially provided with an inverted-U-shaped through hole, a circular through hole, a semi-convex-like through hole, a convex-like through hole and an inverted convex-like through hole from bottom to top. The lining segments can be tightly attached after being spliced, the closing deformation direction is controllable, the contact force is uniform, the lining segments have the advantages of being efficient and stable under the long-term load effect, and the assembling force of the waterproof sealing gasket can be remarkably reduced.

Description

technical field [0001] The invention belongs to the technical field of seals, and in particular relates to an easily compressible waterproof sealing gasket for tunnel lining joints. Background technique [0002] With the development of urban tunnel construction, shield tunneling has become the main construction method for subway tunnels, river-crossing tunnels, etc. due to its high efficiency and little disturbance to surrounding rock and soil. Therefore, the waterproof performance of the lining joint is very important to the normal operation of the tunnel, and it is also one of the important indicators to check whether the tunnel quality is qualified. [0003] In the current tunnel construction projects, EPDM gaskets with internal openings are often used as the main waterproof material when lining segment joints are spliced. EPDM elastic rubber is a super-elastic material, and its waterproof mechanism is to set a gasket groove at the end face of the pre-spliced ​​two linin...

AI Technical Summary

Problems solved by technology

[0004] In actual engineering, when EPDM rubber gaskets are used in tunnels with high waterproof requirements such as deep drainage, river crossing, and sea crossing, in order to achieve a certain waterproof ability, EPDM elastic gaskets will use thick And the large design leads to excessive assembly force of the extruded gasket, which may cause damage to the joint ends of the prefabricated segments during the splicing process. Therefore, it is necessary to provide a new type of EPDM rubber gasket section form, And a through hole with a more suitable shape after closing is opened in the gasket to make the closing process easier, and the waterproof effect can be ensured while reducing the assembly force required for segment lining splicing

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