Lining-built tunnel piping sheet with concave slot

Abstract

This invention is about a pipe of liner tunnel with recess slot which is strip, and the end face of the pipe is arc, one end of it connect with locating bar, the advantages are: 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 lining tunnel segment with grooves. 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 steel mold processing dif...

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

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