A rapid construction method for mechanical excavation of urban hard rock tunnels

Abstract

The invention discloses a mechanical excavation and rapid construction method for an urban hard rock tunnel. The mechanical excavation and rapid construction method comprises the steps that accordingto the cross section shape of a tunnel, a multi-hole combined water-milling drilling machine is adopted for drilling and coring along the tunnel excavation contour line periphery so as to form a peripheral continuous free face of a tunnel contour line; the multi-hole combined water-milling drilling machine is continuously adopted for face drilling and coring in the sequence from periphery to center so as to make residual rock bodies in the tunnel face in shapes of sifters or multiple islets; an impact hammer device is adopted to impact and break the residual rock bodies in the tunnel face; anexcavating-shoveling work head is adopted to conduct mechanical residue removal and output on broken scattered rock blocks and rock residues. Preferably, the multi-hole combined water-milling drillingmachine and the impact hammer device are integrated on the same self-walking device. The mechanical excavation and rapid construction method has the advantages of achieving multi-hole drilling and coring, hydraulic impact and crushing and mechanical residue removal and output through the combined self-walking device, being high in mechanical degree, high in tunneling speed, high in tunneling efficiency and low in safety risk and needing few construction operators.

Description

technical field [0001] The invention relates to the construction technology of urban hard rock tunnels, in particular to a rapid construction method for mechanical excavation of urban hard rock tunnels used in the rapid construction of non-explosive excavation of urban tunnels. Background technique [0002] With the development of the national economy and infrastructure and the innovation of excavation equipment and construction technology, the rock tunnel boring machine (TBM) has been used due to its friendly construction environment, fast construction progress, small disturbance to surrounding rock, and significant economic benefits for long tunnel construction. Widely used in underground engineering construction in various countries. However, due to its high construction cost, it is only suitable for long tunnel construction. Excavation of tunnels by traditional drilling and blasting methods will cause blasting vibrations in the surrounding rock of the tunnel and adjacen...

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Problems solved by technology

[0003] The purpose of the present invention is to solve the problems of low work efficiency and high safety risks in the excavation methods such as hydraulic impact hammer and artificial core drilling used in hard rock tunnels in the existing tunnel mechanical excavation construction process, and to provide a suitable It is a rapid construction method for mechanical excavation of urban hard rock tunnels where non-explosive excavation is carried out in areas where urban tunnels are shallowly buried, where there are many roof structures, where the seismic level of the ground surface is low, or where blasting excavation is not allowed.

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