Cantilever excavator-based construction method for single-line tunnel close to operation line

Abstract

The invention discloses a cantilever excavator-based construction method for a single-line tunnel close to an operation line. The construction method comprises the following steps that firstly, an upper step of a first unit section is constructed; secondly, an upper step of a second unit section is constructed; thirdly, a lower step of the first unit section is constructed; fourthly, an upper stepof an i unit section is constructed; fifthly, a lower step of an i-1 unit section is constructed; sixthly, the fourth step to the fifth step are repeated till excavation of an upper step of aK unit section and excavation of a lower step of a K-1 unit section are completed; and seventhly, a lower step of the K unit section is constructed. A cantilever tunneling machine is applied to construction of the single-line tunnel close to the operation line, the tunnel is excavated through a non-blasting method, the influence of blasting vibration on the operation line is avoided,multi-cycle excavation supporting construction can be conducted every day, the safety of the operation line can be effectively guaranteed, tunnel overexcavation is effectively controlled, the use amount of primary supporting sprayed concrete is reduced, the construction cost investment is reduced, and the concrete ultra-consumption construction problem which is difficult to solve by a traditionaldrilling and blasting method is solved.

Description

technical field [0001] The invention belongs to the technical field of tunnel excavation construction, and in particular relates to a construction method of a single-track tunnel near an operation line based on a cantilever excavator. Background technique [0002] The 21st century is the century of underground space. In recent decades, with the continuous development of production and the improvement of people's social activities, the level of mechanization needs to be gradually improved to meet the growing needs of production and people's lives. At present, domestic tunnel construction is still often carried out by blasting. During the excavation process of the tunnel, when the excavation section is large and the surrounding rock around the tunnel is weak, if the drilling and blasting method is used for construction, the surrounding area around the tunnel will be damaged. The disturbance of the rock is large, and the stability of the rock mass is often affected by the blast...

AI Technical Summary

Problems solved by technology

At present, domestic tunnel construction is still often carried out by blasting. During the excavation process of the tunnel, when the excavation section is large and the surrounding rock around the tunnel is weak, if the drilling and blasting method is used for construction, the surrounding area around the tunnel will be damaged. The disturbance of the rock is large, and the stability of the rock mass is often affected by the blasting, causing disasters; in addition, it is difficult to control the over- and under-excavation of the blasting construction; in addition, the harmful gas generated by the blasting is not conducive to the improvement of the tunnel construction environment, and the tunnel adjacent to the business line Greater impact

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