A fast-assembly supporting structure of section steel frame without welding for initial support construction of tunnel

Abstract

The invention discloses a sectional steel frame welding-free fast assembly support structure for tunnel primary support construction. The sectional steel frame welding-free fast assembly support structure comprises a plurality of trusses of grid steel arch frames arranged in the longitudinal direction of a tunnel at intervals; each truss of grid steel arch frame is anchored on the tunnel wall through a lock pin anchor pipe connecting device; and the adjacent grid steel arch frames are mutually connected through a longitudinal connection device. The sectional steel frame welding-free fast assembly support structure has the advantages that the structure is simple; the installation and the use are convenient; through the splicing connection among the grid steel arch frames, the longitudinal connection device and a lock pin device, the welding is avoided; relevant problems of low construction speed, pollution, difficult quality guarantee and the like caused by welding are solved; meanwhile, a steel plate is welded in advance on the grid steel arch frames; holes are reserved in the steel plates; holes can be used for guiding hole drilling; and the construction is convenient.

Description

technical field [0001] The invention relates to a tunnel primary support device, which belongs to the technical field of tunnel construction engineering, and in particular to a weld-free quick-assembly support structure of section steel frame used for tunnel primary support construction. Background technique [0002] At present, composite lining is widely used in tunnel engineering in my country. According to the design concept of the new Austrian method, the primary support is the main load-bearing structure. The initial support of the tunnel is a joint support system composed of shotcrete, anchor rods, and steel frames. The steel frame has greater support strength and stiffness, which can significantly enhance the initial support capacity. In order to increase the overall stability of each steel frame, longitudinal connecting steel bars are often used to connect adjacent steel frames; in order to anchor the steel frame in the deep part of the surrounding rock and give full...

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Problems solved by technology

[0008] Aiming at the defects in the above-mentioned prior art, the purpose of the present invention is to solve the above-mentioned insufficiencies in the background technology, and to provide a steel frame steel frame welding-free rapid assembly support structure for the initial support construction of the tunnel, which is not only simple in structure, but also easy to assemble , and can effectively avoid related problems such as slow construction speed, pollution, and difficult quality assurance caused by tunnel welding construction

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