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Connected positioning method for lining-built tunnel piping

A tunnel segment and segment technology, which is applied in the field of tunnels, can solve the problems of low stability of tunnel construction quality, high requirements on the accuracy of the covering position, and unsatisfactory stress state of the segment, so as to reduce unstable factors. , The effect of improving the quality of the construction ring and improving the stress state of the structure

Inactive Publication Date: 2006-08-16
SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, this design not only facilitates the construction and assembly, but also brings adverse effects on the structural design: (1) Since the concave-convex tenon grooves are set on the segment surface, machining on multiple surfaces is required, which makes the steel mold processing difficult. The process is complicated; (2) The block surface of the segment is composed of three planes. When the segment is assembled, the contact flatness of the block surface is poor. It is necessary to paste cushion materials such as cork strips on the inside and outside of the contact surface to prevent corners from Stress concentration produces local fragmentation; (3) After the inside and outside of the segment are affixed with buffer materials, the concave and convex parts in the middle of the segment do not directly contact, and the axial pressure transmission of the segment depends entirely on the force transmission of the buffer pad, the effective contact surface is small, and the segment The stress state is not ideal, and the requirements for the material properties and thickness of the buffer pad, and the accuracy of the pasting position are high; (4) The buffer pad paste process is manually operated on the construction site, which is greatly affected by climate and human factors, and the tunnel construction quality low stability

Method used

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  • Connected positioning method for lining-built tunnel piping
  • Connected positioning method for lining-built tunnel piping
  • Connected positioning method for lining-built tunnel piping

Examples

Experimental program
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Embodiment

[0021] Embodiment: The method for assembling and positioning lining tunnel segments involved in this embodiment:

[0022] A. Segment prefabrication, in which a raised plane 8 with a height of 1-5mm is preset in the middle of the block surface at both ends of the segment 2 and 6, that is, the concrete in the middle of the block surface of the segment 2 and 6 is slightly higher than the surrounding corners Concrete 1-5mm, so that when the segments 2 and 6 are assembled, the surrounding concrete surfaces are not in direct contact, which can effectively prevent the corners of the segments 2 and 6 from being cracked due to stress concentration, replacing the existing technology on the block surface How to stick a cork cushion. Elongated grooves 4 and 7 are preset on the raised plane 8, and the end surfaces of the grooves 4 and 7 are in the shape of a semicircle, and traverse the block surfaces at both ends of the segments 2 and 6, the grooves 4 and the grooves 7 have the same shap...

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Abstract

This invention is about a splicing locating method of liner pipe, that set protruding plane and recess slot which the size of it is smaller then the prior tenon technique, using cushion and spacing for splicing which improve the work efficiency and reduce the insecure factors for work quality, ensure the spacing requirements of splicing, improve the machining accuracy of the die cast and the production quality of the pipe, improve the structure stress as the pipes are at the same plane.

Description

technical field [0001] The invention relates to tunnels, in particular to a method for assembling and positioning lining tunnel segments. Background technique [0002] When the lining tunnel segments are assembled in the shield, if the contact surfaces of the end faces of the segments are in plane contact, the phenomenon of "wrong platform" is prone to occur during assembly, which will affect the construction assembly, structural stress state, and waterproof effect, and seriously endanger the tunnel. construction safety. Therefore, when designing the segment, a concave-convex tongue and groove is often designed on the block surface to help limit the position of the segment when assembling, as shown in Figure 1-2. However, this design not only facilitates the construction and assembly, but also brings adverse effects on the structural design: (1) Since the concave-convex tenon grooves are set on the segment surface, machining on multiple surfaces is required, which makes the...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): E21D11/18
Inventor 申伟强曹文宏乔宗昭曹伟飚杨志豪许熠沈张勇徐薇娜管攀峰
Owner SHANGHAI TUNNEL ENGINEERING RAILWAY TRANSPORTATION DESIGN INSTITUTE
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