Secondary lining structure of underground butt joint section of shield

Abstract

The invention provides a secondary lining structure of an underground butt joint section of a shield. The secondary lining structure comprises a circular ring-shaped special reinforced concrete segment, wherein a plurality of embedded steel plates and embedded bolts are uniformly arranged on the end surface of the special reinforced concrete segment in the circumferential direction; a shield shell is arranged outside the special reinforced concrete segment; the shield shell and the special reinforced concrete segment are coaxially arranged; the secondary lining structure further comprises a triangular steel plate; a first right-angle surface of the triangular steel plate is welded with the embedded steel plates, and a second right-angle surface of the triangular steel plate is welded with the inner wall of the shield shell; the secondary lining structure further comprises a steel groove reinforcing piece; the steel groove reinforcing piece is anchored on the inner wall of the reinforced concrete segment through a splicing head; and the special reinforced concrete segments are connected with each other through steel segments. By applying the technical scheme, the problems of segment looseness, tunnel water leakage, shield machine shell corrosion and the like after a butt joint section jack is unloaded can be solved.

Description

technical field [0001] The invention relates to the field of shield tunneling construction, in particular to a secondary lining structure for the underground butt joint section of a shield tunnel. Background technique [0002] With the vigorous development of my country's rail transit projects, the construction of shield method has become more and more perfect, and the frequency of tunnels crossing rivers, seas and lakes is increasing day by day. 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. At the same time, a cutting device is used to excavate the soil in front of the excavation face, transported out of the hole by excavation machinery, jacked in the rear by a jack, and assembled with prefabricated concrete segments to form a mechanized construction method of the tunne...

AI Technical Summary

Problems solved by technology

[0004] The purpose of the present invention is to provide a secondary lining structure for the underground docking section of shield tunneling, so as to solve the problems of segment loosening, water leakage in the tunnel, and corrosion of the shell of the shield machine after the jack is unloaded in the docking section.

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