High-strength three-dimensional support system of yielding type restriction concrete lagging jack

Abstract

The invention discloses a high-strength three-dimensional support system of a yielding type restriction concrete lagging jack, which is mainly formed by a restriction concrete lagging jack, a yielding node, a vertical beam, an anchor rod or an anchor cable, wherein the restriction concrete lagging jack is in a closed structure which is the same as the shape of a roadway and is formed by connecting and combining restriction concrete through a sleeve and the yielding node; the restriction concrete is distributed at an interval and is connected through the vertical beam; the anchor rod or the anchor cable passes through the vertical beam to be anchored into a rock layer; pre-stress is applied so as to form extrusion effect on a surrounding rock; and the lagging jack forms an integral structure with the anchor rod or the anchor cable through the vertical beam, and a space three-dimensional support system is formed by combined action. The high-strength three-dimensional support system is applicable to an underground engineering support including a deep soft rock underground roadway and the like, and has the advantages of high supporting strength, good stability, reasonable stress and the like; and the high-strength three-dimensional support system has a yielding function and can effectively control the stability of a roadway surrounding rock.

Description

technical field [0001] The invention belongs to the field of underground engineering support, in particular to a deep underground tunnel support system. Background technique [0002] With the development of society and economy, more and more underground rock mass projects such as coal mine roadways, highway and railway tunnels and large-scale hydropower stations are being built, and the situation of deep roadways and chamber groups with large buried depth and large cross-sections is gradually increasing. The corresponding support problem is also becoming more and more prominent. In view of the characteristics of large deformation and difficult support of deep soft rock caverns, special research has been carried out on the support methods of deep high-stress soft rock large-section caverns at home and abroad. However, the effects of these support forms are not very satisfactory. Most of the support resistance is insufficient and the support strength is not high. In general,...

AI Technical Summary

Problems solved by technology

In view of the characteristics of large deformation and difficult support of deep soft rock caverns, special research has been carried out on the support methods of deep high-stress soft rock large-section caverns at home and abroad. However, the effects of these support forms are not very satisfactory. Most of the support resistance is insufficient and the support strength is not high.

In general, under the conditions of deep high-stress soft rock and broken rock mass, roadways and chamber groups exhibit large deformation and difficult support problems. The existing support technology is difficult to fully meet the needs of deep high-stress roadways and chamber groups. The need for support has seriously affected the production and safety of deep rock mass engineering

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