Segment and segment ring used for indoor tunneling test of shield tunneling machine model

Abstract

The invention discloses a segment used for an indoor tunneling test of a shield tunneling machine model. The segment comprises an upper main rib board, a lower main rib board, a back board and two end boards, wherein the upper main rib board and the lower main rib board are parallel, and the upper main rib board, the lower main rib board, the back board and the two end boards form a cavity with one side opened. The upper main rib board and the lower main rib board are opening-type circular boards and meet the following condition that D+E=F+G=180 degrees, wherein D is the angle of the central angle of an outer circular arc of the upper main rib board, E is the angle of the central angle of an inner circular arc of the lower main rib board, F is the angle of the central angle of an outer circular arc of the lower main rib board, and G is the angle of the central angle of an inner circular arc of the upper main rib board. The invention further discloses a segment ring used for the indoor tunneling test of the shield tunneling machine model. The segment ring is a closed circular body formed by four segments in a connecting mode, and every two adjacent segments are arranged in an opposite mode. The segments are all of one structure, manufacturing period is short, material cost is low, and assembly and disassembly are convenient.

Description

technical field [0001] The invention relates to a model segment and a segment ring, in particular to a segment and a segment ring used for tunneling tests in a model shield machine room. Background technique [0002] At present, the segment rings used in actual shield tunneling projects are mostly assembled from three types of segments, namely A, B and K segments. Considering the convenience of transportation and assembly, for medium-diameter tunnels, 5-7 blocks are often used at home and abroad, and for large-section tunnels, 8-11 blocks are often used, and the specific blocks are divided into unequal blocks. method and equal block method. The former is widely used in urban subway tunnels due to its small size, light weight, and ease of assembly; the latter can reduce the number of segments and joints, which is conducive to waterproofing. Huang Tunnel and Wuhan Yangtze River Tunnel, etc. [0003] Unequal block method Each ring segment is composed of 1 K block, 2 B blocks...

AI Technical Summary

Problems solved by technology

If the 3+2+1 block type, which is the most widely used in urban subways in my country, is used, due to the small assembly space in the shield cavity and the heavy workload, it is difficult to guarantee the assembly speed and quality during manual work; if the whole ring is used without block method or 2 equal blocks or 3 equal block types, it will cause the quality of the single segment to be too large, and the assembly cannot be completed manually

Therefore, in the current indoor tunneling test of the model shield machine, there is no segment that can not only ensure the speed of disassembly and assembly, but also complete the segment ring by manual assembly, thus reducing the quality and efficiency of the indoor tunneling test of the entire model shield machine

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