Temporary support device for fault fracture zone mountain tunnel steel arch

Abstract

The invention provides a temporary support device for a fault fracture zone mountain tunnel steel arch, and belongs to the technical field of tunnel structure safety. The supporting device comprises two end part fixing devices, a flexible supporting rod, and a control box; both ends of the flexible supporting rod are connected with one end part fixing device respectively, and the middle part of the flexible supporting rod is provided with the control box. The flexible supporting rod is used for adjusting the dimension of the whole supporting device, and controlling the distance between two endpart fixing devices, thus the two end part fixing devices are located at left and right sides of the cross section of a tunnel; the control box is used for slightly adjusting the length of the flexible supporting rod. The temporary support device is mainly applicable to a lining supporting device at the fault fracture zone of a mountain tunnel, and slightly adjust according to the stress and deformation feature change of the steel arch, thus the steel arch is reasonable in stress; the connection between the end part fixing devices and the steel arch is convenient and fast for not requiring complex fixing procedures; moreover, the temporary support device is convenient to mount and dismount, and access of the vehicle and other mechanical devices is not influenced.

Description

technical field [0001] The invention belongs to the technical field of tunnel structure safety, and in particular relates to a temporary support device for a steel arch frame, which is suitable for the initial lining steel arch support structure when the mining method tunnel construction passes through the fractured zone. Background technique [0002] In the construction of mountain tunnels, the new Austrian method is generally used as the theoretical basis, that is, based on the maintenance and utilization of the self-supporting capacity of the surrounding rock, anchor rods and shotcrete are used as the main support means to support in time and control the surrounding rock. The deformation and relaxation of the surrounding rock make the surrounding rock an integral part of the support system. However, during the construction process, it was found that due to the complex and changeable geological conditions of the surrounding rock, the self-supporting capacity of the surroun...

AI Technical Summary

Problems solved by technology

Therefore, the primary lining collapse accidents often occur in the project, which seriously affects the construction progress and project safety.

[0004] At present, in order to limit the convergent deformation of the tunnel, a transverse support beam with two ends hinged on the inner wall of the tunnel is generally used. This beam can only limit the extrusion deformation on both sides of the tunnel, and cannot provide upward support for the steel arch.

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