City subway overlapped shield tunnel segment structure adopting special longitudinal connecting pieces

A shield tunnel segment and longitudinal connection technology, which is applied in tunnels, tunnel linings, underground chambers, etc., can solve the problems of unresolved overlapping uplink tunnel downlink tunnel impact, complicated implementation operations, high cost, etc., to reduce technical risks , Simplify reinforcement measures and reduce project cost

Active Publication Date: 2015-07-22
ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD
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  • Summary
  • Abstract
  • Description
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  • Application Information

AI Technical Summary

Problems solved by technology

[0007] Although the above-mentioned technologies can reduce the impact of the uplink tunnel on the downlink tunnel during construction, the implementation operation is relatively complicated and the cost is high, and the impact of overlap

Method used

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  • City subway overlapped shield tunnel segment structure adopting special longitudinal connecting pieces
  • City subway overlapped shield tunnel segment structure adopting special longitudinal connecting pieces
  • City subway overlapped shield tunnel segment structure adopting special longitudinal connecting pieces

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Embodiment Construction

[0032] In order to describe the present invention more specifically, the technical solutions of the present invention will be described in detail below in conjunction with the accompanying drawings and specific embodiments.

[0033] like figure 1 and figure 2 As shown, the urban subway overlapping shield tunnel segment structure of the present invention is composed of multi-ring segments assembled in the longitudinal direction; the adjacent two ring segments are connected by longitudinal reinforcing connectors, and the reinforcing connectors are formed by a flat "mountain" The glyph connecting member is composed of a set of two card slots, and the card slot contains a cavity that can be inserted and a tenon that can be buckled in; it specifically includes a pre-embedded steel card slot placed in the annular seam of the segment, and a snap-in steel connection Components, pre-embedded pin hole tubes, hollow steel pins, backing plates and fastening nuts; hollow steel pins, back...

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Abstract

The invention discloses a city subway overlapped shield tunnel segment structure adopting special longitudinal connecting pieces. The city subway overlapped shield tunnel segment structure is formed by splicing a plurality of annular segments. A plurality of steel clamping grooves are embedded in the two sides of the segments annularly. Every two adjacent segments are longitudinally connected through the multiple steel connecting pieces. The two ends of each steel connecting piece are buckled in the corresponding steel clamping grooves in the two corresponding adjacent annular segments. The connecting pieces adopting the embedding and buckling technology are easy and convenient to manufacture and install. A cavity formed after the connecting pieces are assembled is filled and compacted through embedded holes, so that it is ensured that the connecting pieces are fastened and reliable and meet the requirement for durable using. By the application of the city subway overlapped shield tunnel segment structure, conventional tunnel periphery soil body passive enforcement is changed into tunnel segment active enforcement in the overlapped tunnel design, the longitudinal tension, bending and transverse shear resisting performance of the tunnel is greatly improved, the downward shield tunnel enforcement measure is simplified, the building cost of projects is reduced, and the influences of upward tunnel running train dynamic loads on a downward tunnel are reduced.

Description

technical field [0001] The invention belongs to the technical field of civil engineering, and in particular relates to an urban subway overlapping shield tunnel segment structure using special longitudinal connectors. Background technique [0002] At present, with the development of urban rail transit, due to factors such as geological conditions, surrounding buildings, underground space development and operational requirements, it is sometimes inevitable to produce close-distance overlapping shield tunnels in projects. This type of tunnel can better solve the route layout of limited road sections, but it often causes some problems due to the small clear distance. Usually, the uplink tunnel is built after the downlink tunnel is completed, and the construction of the uplink tunnel will inevitably affect the structure of the downlink tunnel. Under stress, the deformation of the downlink tunnel requires greater stiffness in the longitudinal joint connection of the shield tunnel...

Claims

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Application Information

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IPC IPC(8): E21D11/04
CPCE21D11/08E21D11/083
Inventor 叶建忠丁赛华李永明李伟平胡茜
Owner ZHEJIANG PROVINCIAL INST OF COMM PLANNING DESIGN & RES CO LTD
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