Pre-embedded pin groove structure for connecting shear pins on tunnel segment and its construction method
A tunnel segment and construction method technology, applied in tunnels, tunnel lining, earthwork drilling and mining, etc., can solve the problems of high cost of concrete tenons, failure to meet shear resistance requirements, and inability to apply tunnel segment shear pins, etc., to achieve enhanced Tie force and connection strength, improve shear resistance, and strengthen the effect of structural strength
Active Publication Date: 2020-04-14
SHANGHAI TUNNEL ENG CO LTD +2
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Problems solved by technology
[0004] The purpose of the present invention is to overcome the defects of the prior art, provide a pre-embedded pin groove structure for connecting shear pins on the tunnel segment and its construction method, and solve the problem that the existing flat joint tunnel segment cannot meet the requirements of pipe jacking construction. The shear requirements of the new process, the tunnel segment shear pin cannot be applied to the 350mm thick general segment, and the shear resistance of the concrete tenon needs to re-make the steel form and the cost is high, etc.
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[0028] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.
[0029] see figure 1 , The present invention provides a pre-embedded pin groove structure for connecting shear pins on a tunnel segment and a construction method thereof, which are used to solve the problem that the current popular general-purpose flat joint segments have weak shear resistance and encounter areas that require shear resistance. It is difficult to meet the shear resistance requirements. If the traditional concrete tenon is used for shear resistance, another steel mold needs to be made, and the cost is high. If the shear pin is used for shear resistance, the thickness of the current segment is too thin, and it is difficult to meet the shear resistance requirements with concrete pre-embedded steel bars. Cut requirements, etc. The pre-embedded pin-groove structure provided by the invention can be directly placed on the steel mold when...
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The invention relates to an embedded pin groove structure for connecting a shear pin on a tunnel segment, which comprises a pin groove body, a side plate and a first shear-resisting plate, wherein thepin groove body is embedded in the tunnel segment and is internally provided with a groove adapted to the pin head of the shear pin, and the mouth of the groove is arranged on the corresponding ringsurface of the tunnel segment; the side plate is formed at the end part of the pin groove body and surrounds the edge of the mouth of the groove and is also arranged on the corresponding ring surfaceof the tunnel segment; and the first shear-resisting plate is fixedly arranged at the end part of the pin groove body and is arranged at the bottom of the groove, and is embedded in the tunnel segment. The embedded pin groove structure provided in the invention is used for forming a groove connecting the shear pin on the tunnel segment and can be applied to a general segment with a thickness of 350 mm, the shear-resisting bearing capacity of the embedded pin groove structure is 150 KN, and the shear-resisting requirements of the new technology of jacking pipe disassembly-free construction arecompletely met. A steel mold does not need to be changed, embedding of steel bars is not needed, and the operation is simple and convenient.
Description
technical field [0001] The invention relates to the field of tunnel construction, in particular to a pre-embedded pin groove structure used for connecting shear pins on a tunnel segment and a construction method thereof. Background technique [0002] At present, more and more tunnels such as urban subways, highways and railways are constructed by shield method. At present, only large tunnels in shield tunneling in China use general 120mm diameter shear pins for shear resistance, and the thickness of large tunnel segments is generally more than 600mm. For the general subway segment with a thickness of only 350mm, the reinforcement outside the concrete groove cannot meet the shear resistance requirements, and the general segment with a thinner thickness (350mm) cannot be equipped with steel reinforcement due to the need to reserve the position of the concrete groove. In the construction of the existing shield method, the shield segments are usually connected by flat joints, a...
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IPC IPC(8): E21D11/08
CPCE21D11/08E21D11/083
Inventor 万敏宿文德张衍杨燕赵玉同刘勇黄德中翟一欣朱桔妹陈培新寇晓勇
Owner SHANGHAI TUNNEL ENG CO LTD