Fast construction method for controlling extruded type deformation of tunnel

Abstract

Disclosed is a fast construction method for controlling extruded type deformation of a tunnel. The fast construction means that relative to the construction speed or construction efficiency of arranging a common temporary transverse support, a foot locking anchor rod and the like, the speed is increased or the efficiency is improved, the fast construction is suitable for operation spaces of fractional construction of a tunnel bench cut method, primary supporting steel arch frame and arch foot deformation can be effectively controlled, so that the construction efficiency is improved advantageously, and the construction safety is ensured advantageously. The fast construction method for controlling extruded type deformation of the tunnel is characterized in that the fast construction method comprises the following steps that (1), in the fractional construction of the tunnel bench cut method, arch foot basal troughs are dug out from the left side and the right side of a previous step; and (2), arch foot deformation control devices are arranged in the arch foot basal troughs, when the arch foot deformation control devices dig downwards an adjacent next step, and hanging arm supports capable of being disassembled and assembled are formed in the a plurality arch feet longitudinally distributed in same level primary supporting.

Description

technical field [0001] The invention relates to the technical field of tunnel construction, in particular to a rapid construction method for controlling tunnel extrusion deformation. The rapid construction refers to the construction speed or construction efficiency compared with the commonly used temporary horizontal braces, locking foot bolts, etc. It speeds up the speed or improves the efficiency, and is suitable for the step-by-step construction work space of the tunnel step method. It can effectively control the deformation of the arch foot of the initial support steel arch, which is conducive to improving construction efficiency and ensuring construction safety. Background technique [0002] When tunnels are built in expansive surrounding rocks, high ground stress soft rocks and other strata, extrusion deformation will inevitably occur. At present, step method and CRD method are generally used in these strata (CRD construction, full name cross partition wall method, is ...

AI Technical Summary

Problems solved by technology

However, the setting of temporary cross braces affects the slag discharge of the upper steps and the excavation of the lower steps, which reduces the efficiency of tunnel construction and affects the progress of tunnel construction.

On the other hand, during the step-by-step construction of the tunnel, the working space is narrow, and the installation of locking anchor bolts is difficult, and the construction quality is difficult to guarantee. cause serious casualties and property damage

Images