Construction method of roadway lining structure utilizing quadrangular pyramid steel bar reticulated shell

Abstract

The invention discloses a construction method of a roadway lining structure utilizing a quadrangular pyramid steel bar reticulated shell. The construction method comprises the following specific stepsthat anchor rods are installed in roadway surrounding rock, a reinforcing ring is formed in the roadway surrounding rock, and a proper amount of anchor cables are additionally arranged to expand thereinforcing ring to a deep rock mass; then, quadrangular pyramid steel bar latticed shell supports are fixedly embedded into the roadway surrounding rock in a pairwise spliced mode to form a steel frame for supporting the rock mass, and the steel frame and the surrounding rock reinforcing ring work together to bear pressure loads; and then layer spraying is conducted, specifically, concrete is selected for layer spraying, and a concrete spraying layer and the quadrangular pyramid steel bar reticulated shell supports work together. In the supporting structure, the unique quadrangular pyramid structure can bear large mine pressure by means of the characteristic that the stability of a triangle is extremely good, the pressure is dispersed step by step, and the overall stability is good; and layer spraying concrete is wrapped in the steel bars, so that the good compression characteristic of the concrete is brought into play, in addition, the steel bars wrap the concrete, and degradation phenomena such as concrete slurry peeling in the use process of the roadway are restrained.

Description

technical field [0001] The invention relates to a construction method for a roadway lining structure using a quadrangular pyramid reinforced reticulated shell, and belongs to the technical field of mine bracket fixation. Background technique [0002] In the prior art, for roadways with low surrounding rock pressure, anchor mesh spraying is often used for support, and the role of steel mesh is often limited to restricting rockfall, and it is rarely able to withstand large ground pressure; while for large confining pressure U-shaped steel shrinkable brackets are more widely used in roadways, which have good cross-sectional shape and geometric parameters, and are easy to realize the shrinkage after the overlapping of section steel, but the use of U-shaped steel brackets in China is far from being able to make People are satisfied, mainly manifested in: First, the strength of the U-shaped steel support is low, and the deformation of the soft rock roadway cannot be effectively co...

AI Technical Summary

Problems solved by technology

All of the above are improvement schemes for anchor-mesh spray support, but in the actual construction process, it is usually spliced ​​by several parts, and its force is usually firstly exerted by the steel bars close to the roadway and then transmitted to the grid-like On the sub-grid frame, the form is complex, and the section of the mine roadway is small, and it is often difficult to adjust the preset section form after selection

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