Closed metal support structure and construction method thereof

Abstract

The invention relates to a closed metal support structure with an I-shaped section member of corrugated steel web plates. The I-shaped section member of the corrugated steel web plates comprises a top flange, a bottom flange and the corrugated steel web plates, wherein the corrugated steel web plates are welded with the top flange and the bottom flange. After each section of member is bent to be of a required shape of the support, the corrugated web plates are welded by an end plate, and the top flange and the lower flange are connected with a perforated cover board by bolts. According to the invention, after the corrugated steel web plates are connected by the end plate, the deformation of an axis of the support is generated; on the other hand, when the flanges bear an axial force, the axial deformation of the supported is adapted through adjusting the position of an adjusting screw in the hole, and the telescopic node connection manner is well adaptive to large deformation of soft rock. The closed metal support structure provided by the invention has the advantages of simple manufacturing and processing of the end plate and the cover board, convenience for installation, economy and reasonability, and capability of remarkably improving the comprehensive benefit. The closed metal support structure and the construction method thereof can be applied to the technical field of soft rock tunnel support.

Description

technical field [0001] The invention relates to a metal support structure applicable to soft rock tunnel support structures and a construction method thereof, belonging to the technical field of tunnel (roadway) structure support. Background technique [0002] Traditional soft rock tunnel (roadway) support structure, such as flat web I-beam support members ( figure 1 As shown), it is composed of upper flange 1, lower flange 2 and flat web 9. Usually, the shear bearing capacity and shear buckling strength of the web are relatively low, and quite a number of rigid supports are not compatible with the deformation of the surrounding rock. . At the same time, traditional U-shaped steel members (such as figure 2 Shown) the support reaction force is limited, sometimes it is difficult to meet the support requirements. Corrugated steel web I-shaped member (such as image 3 (shown) has high shear buckling strength, and the use of thinner corrugated webs can significantly increase...

AI Technical Summary

Problems solved by technology

[0002] Traditional soft rock tunnel (roadway) support structure, such as flat web I-beam support members ( figure 1 As shown), it is composed of upper flange 1, lower flange 2 and flat web 9. Usually, the shear bearing capacity and shear buckling strength of the web are relatively low, and quite a number of rigid supports are not compatible with the deformation of the surrounding rock.

At the same time, traditional U-shaped steel members (such as figure 2 shown) the support reaction force is limited, sometimes it is difficult to meet the support requirements

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