Excavation method of arched ground survey leveling tunnel based on small tbm roadheader

Abstract

The invention discloses an arched geological exploration adit tunneling method based on a small TBM. According to the arched geological exploration adit tunneling method based on the small TBM, the requirements of small disturbance to surrounding rock, good adit chamber stability, a level and smooth and round tunneling face, accurate positioning, no back break and the like can be met, and the effects of high efficiency, good quality, technical feasibility, economic rationality, safety and environmental protection and the like are achieved; the small TBM with the diameter of 1.0 m, 1.5 m or 2 mis utilized, the small TBM has the characteristics of light weight, dexterity, easy moving and handling and the like, in addition, the equipment power is relatively small, used auxiliary facilities and the like are relatively less, so that the small TBM is used for alpine and gorge regions and narrow site regions, and the range of application is wide; and compared with an existing square, rectangular or a circular adit, a geological exploration adit obtained by the tunneling method is in an arch shape and has the advantages that the adit chamber stability is good, the adit chamber usage rateis high, and the digging amount is less.

Description

technical field [0001] The invention belongs to the field of geological exploration in the early stage of water conservancy and hydropower projects, and in particular relates to a method for excavating an arched ground leveling hole based on a small TBM roadheader, in particular to an arched leveling hole for ground leveling based on a small TBM roadheader with a diameter of 1.0m, 1.5m or 2m. Excavation method. Background technique [0002] In recent years, with the huge demand for water resource development in the western region, the rational development of water resources such as "transmitting power from west to east" and "transmitting Tibetan power to outside" has become a major issue in ensuring my country's energy security, improving energy structure, and optimizing regional water resource allocation. strategic move. Laxiwa, Jinping, Xiaowan and other 300m-level hydropower stations have been built and put into operation; currently in the Qinghai-Tibet Plateau area, the ...

AI Technical Summary

Problems solved by technology

[0012] The purpose of the present invention is to overcome above-mentioned deficiencies in the prior art, provide the excavation method based on the small-sized TBM roadheader of arched ground survey flat hole, overcome 1 in the prior art: the tunnel construction of narrow space also stays in manual drilling and blasting, every day The excavation speed is only 0.5m ~ 1.5m, the construction cost is high, the risk is high, and the construction accident rate is high; 2: The traditional artificial drilling and blasting method has low efficiency and long exploration time, which cannot meet the needs of planning and design progress nodes, and pyrotechnic materials Difficult supply, soaring labor costs, 3: Due to the large change in lithology of composite formations, it is difficult to control the section shape of the traditional drilling and blasting method, the stability of the cavern is poor, and the shape of the cavern is single, etc.

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