A shield tunnel segment longitudinal seam joint

Abstract

The invention provides a longitudinal joint connector for a duct piece of a shield tunnel, and belongs to the technical field of a shield tunnel. The longitudinal joint connector comprises a duct piece body; the duct piece body comprises a duct piece solid part which is a first part and a solid part which is a second part, the first part is located on the longitudinal joint end part of the duct piece and is as thick as the longitudinal joint body, and the second part extends to the inside part of a duct piece ring from at least a part of inside edge of the first part. The duct piece body further comprises a longitudinal joint connecting hole and a longitudinal joint connecting piece, wherein the shape of the longitudinal joint connecting piece is matched with the shape of the longitudinal joint connecting hole, and a distance between the center of the longitudinal joint connecting hole and a stressed stretching side of the duct piece on a connection is less than that of a stressed side. The longitudinal joint connector provided by the invention is simple to process and lower in cost, is applicable to an existing shield tunneling machine without the need of changing the outer diameter of the duct piece, and the influence on the cost of the whole engineering is not high; furthermore, the longitudinal joint connector can be applied to any shield tunnel, including a road shield tunnel, a metro shield tunnel, a Chinese shield tunnel, other shield tunnels for water delivery or pipes and the like.

Description

technical field [0001] The invention belongs to the technical field of shield tunneling, and relates to a segment joint, in particular to a segment longitudinal seam joint. Background technique [0002] The longitudinal seam joints of existing shield tunnel segments have low bending stiffness, and the longitudinal seam joints are easily damaged during deformation. The longitudinal seam joints are the weakest link in the lateral deformation process of the shield tunnel. [0003] At the same time, the bolt positions of the segment inner tension longitudinal seam joint and the segment outer tension longitudinal seam joint of the existing shield tunnel are exactly the same, regardless of the influence of different expansion forms on the joint bending stiffness. In fact, when the longitudinal joints of the segments are stretched internally and externally, the concrete compression zone is the outer side and the inner side respectively. [0004] In addition, in the design of exist...

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Problems solved by technology

[0004] In addition, in the design of existing shield tunnels, in order to improve the overall deformation resistance, the overall thickness of the segment is increased, which increases the cost. In addition, considering the requirements of the use function on the structure limit of the shield tunnel, in the tube When the thickness of the segment increases, the thickness of the segment can only be increased by increasing the outer diameter of the segment ring, which leads to new requirements for the corresponding shield machine model

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