Contractible force transmission connecting device suitable for large-deformation tunnel primary support

Abstract

The invention discloses a contractible force transmission connecting device suitable for a large-deformation tunnel primary support, and relates to the technical field of tunnel primary support devices. The device comprises a transverse plate and a bottom plate, a rotating rod is arranged on the transverse plate in a penetrating mode, and a fixing mechanism used for enhancing the connection firmness between the device and the ground is arranged on the bottom plate. According to the device, the trend of continuous deformation of a tunnel can be weakened, top plates are tightly attached to the top of the tunnel, and positioning cones are inserted into the deep position of the ground, so that the connection firmness between the device and the ground is enhanced, and shaking is not prone to happen; the three top plates make contact with the arc-shaped surface of the top of the tunnel, and multiple first springs are compressed, so that the effect of tight attachment to the surface of the top is achieved, and the supporting effect of the device is improved; and in addition, excessive deformation stress of the tunnel can be properly removed through compression deformation of the device, so that the trend of continuous deformation of the tunnel is weakened, the primary support cannot be damaged due to the fact that the primary support bears large deformation stress, and the primary support of the tunnel is effectively protected.

Description

technical field [0001] The invention relates to the technical field of tunnel primary support devices, in particular to a retractable force-transmitting connection device suitable for large-deformation tunnel primary support. Background technique [0002] A tunnel is an engineering building buried in the ground, and it is a form of human use of underground space. Tunnels can be divided into traffic tunnels, hydraulic tunnels, municipal tunnels, mine tunnels, deep-buried railways and highway tunnels in various weak and broken rock formations, large deformation is common, and the current popular control method for large deformation of tunnels is to Close the primary branch of the tunnel to form a ring and strengthen the primary branch lining to resist the surrounding rock pressure and reduce the deformation of the tunnel. However, this idea has little effect in practical application. Large-deformation tunnels often suffer from distortion of the initial support steel frame, cr...

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Problems solved by technology

[0003] The existing retractable force transmission connecting device is inconvenient to transport, and requires a lot of manpower to assemble before installation, and after the construction section is completed, these devices need to be dismantled after the construction, which still requires a lot of manpower. In addition, the existing It is difficult to make the support plate fit the inner wall of the surrounding rock of the tunnel during installation. Therefore, it is necessary to design a shrinkable force-transmitting connection device suitable for the primary support of large-deformation tunnels to solve the above problems.

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