A support segment for shield tunneling

Abstract

The invention discloses a support segment for shield tunneling. The two support segments are respectively provided with a first protrusion and a second protrusion on the two end faces of the seam on the cross section of the tunnel, wherein the support segment on the left side The end surface of the segment forms an annular step, the sum of the thicknesses of the two protrusions is equal to the thickness of the supporting segment, the second protrusion is inserted into the first protrusion and the end surface of the second protrusion does not touch the step; The sealing gasket includes a cylindrical gasket and an annular gasket, the annular gasket is coaxially arranged on the outer wall of the cylindrical gasket, and the annular gasket is embedded in the sealing gap between the end surface of the second protrusion and the step; the pressing block includes [ The horizontally placed pressing part of the type, the pressing part is pressed across the cylindrical pad, and the connecting parts are respectively tightened and fixed on the inner wall of the supporting segment by bolts. At least one of the bolts on the connecting part is screwed into two convex parts at the same time. up. The invention can effectively prevent the leakage at the seam of the tunnel support pipe on the cross section.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and in particular relates to a support segment for shield tunneling. Background technique [0002] In shield construction, every time a tunnel of a certain depth is excavated in front of the shield machine, the excavated tunnel will be supported. Usually, the segment is supported. However, the current segment has many problems. Leakage often occurs at the junction in the cross-sectional direction of the tunnel, which makes the tunnel supported by the entire segment prone to landslides or even collapse. Due to the arc-shaped splicing structure of the segment in the axial direction, water is not easy to penetrate into the splicing. The inside of the good pipe body, so the most likely place for the spliced ​​pipe body to leak is on the seam on the cross section. SUMMARY OF THE INVENTION [0003] The purpose of the present invention is to provide a support segment for shield, which can ef...

AI Technical Summary

Problems solved by technology

[0002] In shield construction, every time a tunnel of a certain depth is excavated in front of the shield machine, the excavated tunnel will be supported. Segments are usually used for support. However, there are many problems in the current segment. Leakage often occurs at the joints in the cross-sectional direction of the tunnel, causing the tunnel supported by the entire segment to slide or even collapse. However, the joints of the segments in the axial direction are not easy to seep into the joint due to the arc-shaped splicing structure. The inside of a good pipe body, so the most likely place for a spliced ​​pipe body to leak is at the seam on the cross section

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