Waterproof sealing structure for duct pipe connecting joint of shield tunnel

Abstract

The invention provides a waterproof sealing structure for a duct pipe connecting joint of a shield tunnel. The waterproof sealing structure comprises a waterproof sealing gasket body, wherein one side face of the waterproof sealing gasket body is inserted in a corresponding waterproof sealing gasket groove in a duct pipe, and the other side face of the waterproof sealing gasket body is in butt joint with a waterproof sealing gasket body of an adjacent duct pipe adjacent to the duct pipe. The waterproof sealing structure further comprises a first self-sealing body used for strengthening the waterproof capacity between the duct pipe and the waterproof sealing gasket body and a second self-sealing body used for strengthening the waterproof capacity between the waterproof sealing gasket body and the waterproof sealing gasket body of the adjacent duct pipe. One end of the first self-sealing body is connected with the waterproof sealing gasket body, so that the first self-sealing body is tightly attached to the duct pipe when being pressed. One end of the second self-sealing body is connected with the waterproof sealing gasket body, and the connecting position of the end of the second self-sealing body and the waterproof sealing gasket body is located at the end, close to the adjacent duct pipe, of the waterproof sealing gasket body. The waterproof sealing structure is easy to process, good in self-sealing effect and low in cost. Meanwhile, when the opening amount of the duct piece joint is large, waterproof failure cannot be caused.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and relates to a waterproof sealing structure, in particular to a waterproof sealing structure used at joints of segments. Background technique [0002] Existing shield tunnel segment waterproof gaskets are prone to opening or being broken down by water pressure under high water pressure, resulting in failure of segment waterproofing. figure 1 It is a cross-sectional schematic diagram of two opposing waterproof gaskets in the prior art, figure 2 It is a schematic diagram of the water pressure of the segment waterproof gasket in the prior art, wherein the segment 101 and the segment 102 are adjacent segments, and the arrow 2 indicates the water pressure. When the water pressure is large enough or the segment 101 and the segment 102 When the mutual extrusion force of the tunnel is insufficient, the water outside the tunnel can easily penetrate the waterproof gasket and cause the structur...

AI Technical Summary

Problems solved by technology

[0002] Existing shield tunnel segment waterproof gaskets are prone to opening or being broken down by water pressure under high water pressure, resulting in segment waterproof failure

figure 1 It is a cross-sectional schematic diagram of two opposing waterproof gaskets in the prior art, figure 2 It is a schematic diagram of the water pressure of the segment waterproof gasket in the prior art, wherein the segment 101 and the segment 102 are adjacent segments, and the arrow 2 indicates the water pressure. When the water pressure is large enough or the segment 101 and the segment 102 When the mutual extrusion force of the tunnel is insufficient, the water on the outside of the tunnel can easily penetrate the waterproof gasket and cause the structure to fail in waterproofing

In addition, during the deformation process of the segment structure, the segment joints inevitably open to a certain extent, resulting in a decrease in the mutual extrusion force between the waterproof gaskets, or even zero mutual extrusion force between the waterproof gaskets. Or there is a certain gap between the waterproof gaskets, which will cause the waterproof failure of the segment joint

[0003] It can be seen that there are two main reasons for the waterproof failure of the existing segment joints. One is that when the water pressure is too high, the water pressure causes the waterproof gasket to deform, and finally the water penetrates the waterproof gasket and causes the waterproof failure of the segment joint; the second is The mutual extrusion force between the waterproof gaskets is reduced due to the opening of the segment joints, and even the mutual extrusion force of the waterproof gaskets is zero

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