Destruction triggering device for simulating local destruction accidents of shield tunnel

Abstract

The invention discloses a destruction triggering device for simulating local destruction accidents of a shield tunnel. The destruction triggering device comprises a horizontal outer shaft, wherein the horizontal outer shaft comprises a first shaft section, a second shaft section and a third shaft section which are sequentially connected from left to right, the outer side of the left end of the first shaft section is fixedly provided with a first fixing disc, the second shaft section is provided with a segment connecting piece which moves in the radial direction, and a second fixing disc is fixed to the outer side of the right end of the third shaft section; a transmission inner shaft coaxial with the horizontal outer shaft is arranged in the horizontal outer shaft, one end of the transmission inner shaft is provided with a gear meshed with the segment connecting piece, the other end of the transmission inner shaft is provided with a rocking handle, the rocking handle drives the transmission inner shaft and the gear to rotate relative to the horizontal outer shaft, and the gear drives the segment connecting piece to move in the radial direction. By means of the destruction triggering device, engineering accidents caused by destruction of local weak positions in the shield tunnel can be simulated; on-site detection of the accidents is difficult, the device expands methods for researching the accidents, and meanwhile, a research idea is provided for further research.

Description

technical field [0001] The invention relates to a model test device in underground engineering, more specifically, to a damage trigger device for simulating local damage accidents of shield tunnels. Background technique [0002] In the past ten years, in the subway tunnels in Shanghai, Nanjing, Tianjin, Taiwan and other places, large-scale continuous damage engineering accidents occurred due to local damage of the tunnel. This has caused serious damage to the property safety of the people and the society, and we should pay enough attention to it. [0003] The shield tunnel is assembled by reinforced concrete segments, and the joints are weak. In the case of local segment damage, it is very easy to cause continuous damage of dominoes along the length of the tunnel. At present, the research on the collapse of tunnels mainly focuses on tunnels constructed by underground excavation method, and mainly focuses on the instability and failure mechanism of the excavation surface, an...

AI Technical Summary

Problems solved by technology

At present, the research on the collapse of tunnels mainly focuses on the tunnels constructed by the underground excavation method, and mainly focuses on the instability and failure mechanism of the excavation surface, and hardly involves the continuous failure and collapse of the tunnels constructed by the shield method along the longitudinal direction.

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