Tunnel lining joint waterproof sealing gasket easy to compress

A waterproof gasket and easy-to-compress technology, which is applied in tunnel lining, tunnel, shaft lining, etc., and can solve the problems of high assembly force of extrusion gasket, reduced assembly force of segment lining, and damage to the end of prefabricated segment joints, etc. , to achieve the effects of stable compression deformation direction, optimized assembly force, and optimized waterproof performance

Pending Publication Date: 2022-05-24
GUANGXI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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

Method used

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  • Tunnel lining joint waterproof sealing gasket easy to compress
  • Tunnel lining joint waterproof sealing gasket easy to compress
  • Tunnel lining joint waterproof sealing gasket easy to compress

Examples

Experimental program
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Effect test

Embodiment 1

[0030] like figure 1 As shown, an example of the easily compressible waterproof sealing gasket for tunnel lining joints according to the present invention includes a gasket body 1 arranged in the waterproof groove 2; The installation end in the waterproof groove 2 and the extrusion end that can be extruded with the gasket body 1 of another shield segment; The opening shapes of the holes are like convex through holes 3, inverted convex through holes 4, half convex through holes 5, circular through holes 6 and inverted U-shaped through holes 7; the gasket body 1 from the bottom Up to the top, an inverted U-shaped through hole 7 , a circular through hole 6 , a semi-convex through hole 5 , a convex-like through hole 3 and an inverted convex-like through hole 4 are arranged in sequence.

[0031] like figure 2 As shown, the specific size of the convex through hole 3 is designed to be the length L of the bottom edge 31 of the convex through hole. 1 Equal to the length L of the to...

Embodiment 2

[0041] Another example of the easily compressible waterproof gasket for tunnel lining joints according to the present invention, the gasket body 1 is sequentially provided with inverted U-shaped through holes 7, circular through holes 6, and semi-convex through holes from the bottom to the top. Hole 5, quasi-convex through hole 3 and inverted quasi-convex through hole 4, and the assembly force can be effectively controlled by reasonably setting the shape, size and position of the through hole to avoid damage to the segment. Extensibility, the tight fit between the waterproof gasket and the waterproof groove 2 and the gasket body 1 after being compressed and closed further ensures the waterproof effect

[0042] The other structures of this embodiment are the same as those of the first embodiment.

Embodiment 3

[0044] Another example of the easily compressible waterproof sealing gasket for tunnel lining joints according to the present invention, the quasi-convex through holes 3, semi-convex through holes 5 and inverted quasi-convex through holes 4 are a group of easily deformable through holes 3 The design of the hole makes the upper and lower two gasket bodies 1 tightly fit after being compressed in the contact area. The overall rigidity of the waterproof gasket in this area is large, and the contact surface is evenly stressed, which is more stable and reliable in long-term use. higher.

[0045] Other structures of this embodiment are the same as those of Embodiment 1 or 2.

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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...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/38
CPCE21D11/385Y02E10/20
Inventor 马少坤何本富周长段智博邵羽刘莹黄震张加兵马敏黄海均李金梅
Owner GUANGXI UNIV
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