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 comprises a prefabricated lining segment unit; circumferential seam grooves are formed in the tail end of a circumferential seam of the segment, longitudinal seam grooves are formed in the tail end of a longitudinal seam of thesegment, and the axially adjacent circumferential seam grooves and the longitudinally adjacent longitudinal seam grooves are assembled through circumferential seam sealing strips and longitudinal seam sealing strips in a spliced mode; and the cross section of the circumferential seam grooves and the longitudinal seam groove are in a "V" shape, the shapes of the circumferential seam sealing stripsand the longitudinal seam sealing strips are matched with the shapes of the circumferential seam grooves and the longitudinal seam grooves, and sealing pasting strips are pasted on the inner walls ofthe circumferential seam grooves and the longitudinal seam grooves. The wedge-type prefabricated shield segment waterproof structure enables the upper and lower sealing strips to be closely pasted toeach surface of a prefabricated segment groove, the rubber elasticity is fully utilizes through bolt stiffening to enable bolts to be close pasted with positions on the wall of the groove; and compared with a traditional simple parallel pasting method, a connecting method makes full use of the extrusion of a wedge-shaped body in the groove to enable the entire connecting device to be 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

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