A reinforced U-shaped steel bracket that can be pressed

Abstract

The invention relates to a reinforced yielding U-shaped steel bracket which comprises first support section steel vertically arranged on two sides of a roadway, wherein second support section steel for supporting surrounding rocks at the cambered top of the roadway is arranged at the upper ends of the first support section steel, and is bent into a curved structure; two ends of the second support section steel are movably matched with the upper ends of the first support section steel in the vertical direction respectively; slip limiting yielding mechanisms for stopping the second support section steel moving downwards are arranged at the overlapping parts of the first and second support section steel. Such yielding U-shaped steel brackets can be arranged at intervals in the length direction of the roadway, and the pressure of the surrounding rocks at the top of the roadway is released and transmitted to the second support section steel, so that a sufficient yielding amount is provided for the surrounding rocks at the top of the roadway to avoid the condition that the U-shaped steel brackets reach the yield strength to cause buckling, kicking and collapsing of the U-shaped steel brackets, and further ensure effective support to the surrounding rocks at the cambered top of the roadway, and yielding pressure release and rigid support of the surrounding rocks at the cambered top of the roadway are realized.

Description

technical field [0001] The invention relates to the technical field of roadway construction, in particular to a reinforced U-shaped steel bracket that can be compressed. Background technique [0002] In the process of roadway construction, in order to support the rock wall of the roadway, supporting steel frames are generally arranged in the roadway. The problem of roadway collapse caused by the pressure release of the surrounding rock at the top and waist of the roadway. During the construction of the roadway, the surrounding rock pressure on the arc-shaped top of the roadway is applied to the supporting steel frame, and the surrounding rock pressure on the arc-shaped top of the roadway is released and transmitted. to both sides of the waist of the roadway, thereby exerting compressive stress on the waist of the supporting steel frame; a large number of roadway construction monitoring data show that if the surrounding rock pressure at the arc-shaped top of the roadway is re...

AI Technical Summary

Problems solved by technology

[0002] In the process of roadway construction, in order to support the rock wall of the roadway, supporting steel frames are generally arranged in the roadway, and the supporting steel frames are mostly truss structures to support the top and waist of the roadway rock wall, avoid The problem of roadway collapse caused by the pressure release of the surrounding rock at the top and waist of the roadway. During the construction of the roadway, the surrounding rock pressure on the arc-shaped top of the roadway is applied to the supporting steel frame, and the surrounding rock pressure on the arc-shaped top of the roadway is released and transmitted to both sides of the waist of the roadway, thereby exerting compressive stress on the waist of the supporting steel frame; a large number of roadway construction monitoring data show that if the surrounding rock pressure on the arc-shaped top of the roadway is released too quickly, the rigidity of the supporting steel frame will be damaged, resulting in Buckling, kicking, and collapse of the supporting steel frame, creating a significant safety hazard

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