A wedge-type prefabricated shield segment waterproof structure

Abstract

The invention relates to a wedge-type prefabricated shield segment waterproof structure and belongs to the technical field of shield construction. The waterproof structure includes a prefabricated lining segment unit. An annular groove is provided at the end of the annular seam of the segment. A longitudinal seam groove is provided at the end of the longitudinal seam of the segment. The axially adjacent annular grooves are connected to the longitudinally adjacent ones. The longitudinal seam grooves are connected and assembled by the annular seam sealing strip and the longitudinal seam sealing strip. The cross-sections of the annular seam groove and the longitudinal seam groove are both "V" shaped. The shapes of the seam groove and the longitudinal seam groove match, and sealing patches are attached to the inner walls of the annular seam groove and the longitudinal seam groove. The invention makes the upper and lower sealing patches closely fit each surface of the prefabricated segment groove, and makes full use of the rubber elasticity through bolt reinforcement to make it closely fit with the groove wall everywhere; it is different from the traditional simple parallel fit Compared with the previous method, this connection method makes full use of the extrusion of the wedge-shaped body in the groove to make the entire connection device integrated and more compact.

Description

technical field [0001] The invention belongs to the field of shield construction, and in particular relates to a wedge-type prefabricated shield segment waterproof structure. Background technique [0002] The shield method is a fully mechanized construction method in the underground excavation method. It propels the shield machine in the ground, and supports the surrounding rock through the shield casing and segments to prevent collapse into the tunnel. The interior of the tunnel constructed by the shield method is made of segment lining with a certain radian. There are segment annular seams and segment longitudinal seams between the segments. For straight seams. Although the segment annular seam and the segment longitudinal seam are sealed with sealing strips, they are easily not tightly sealed and local leakage occurs. Groundwater can easily enter the tunnel through the segment annular seam and segment longitudinal seam, which not only increases the Later maintenance co...

AI Technical Summary

Problems solved by technology

[0004] The structure is novel and easy to manufacture, but it also has the following defects: 1. One end of the sealing strip is a circular seam straight head, and the other end is a dovetail head. After the sealing strip between the two segments is completely pressed into the groove of the adjacent segment, it cannot 2. The sealing strip is first pressed to the innermost wall of the segment, and the bolt is strengthened to continue to squeeze to force the sealing strip to fit the upper and lower walls of the segment groove, which requires the material of the sealing strip It has a large Poisson's ratio, but it is bound to have defects such as elasticity, which will eventually lead to hidden dangers of waterproofing

Images