The excavation method of symmetrical wheel-shaped ground survey and leveling tunnel based on miniature tbm roadheader

Abstract

The invention discloses a symmetrical wheel-shaped geological exploration adit tunneling method based on a miniature TBM. By the adoption of the method, the requirements on small disturbance of surrounding rock, good stability of cavities, level and smooth tunneling faces, accurate positioning and no over-excavation can be met, and the effects of high efficiency, high quality and technical feasibility and the economic and reasonable, safe and environment-friendly effects are achieved. According to the symmetrical wheel-shaped geological exploration adit tunneling method, the miniature TBM withthe diameter of 1.0 m is utilized and has the beneficial effects of light weight, dexterity, easy moving and lifting and the like, and the equipment power of the miniature TBM is relatively small, sothat the number of supporting facilities used is relatively small, and the miniature TBM is used in mountain valleys and narrow areas and has a wide range of applications; and a geological exploration adit obtained by the tunneling method is in a symmetrical wheel shape and has the beneficial effects of good stability of the cavity, high utilization rate of the cavity, less excavation and the like compared to existing square or rectangular or circular adits.

Description

technical field [0001] The invention belongs to the field of preliminary geological exploration of water conservancy and hydropower projects, and in particular relates to a method for excavating a symmetrical wheel-shaped geological survey flat tunnel based on a miniature TBM roadheader, in particular to a method for digging a symmetrical wheel-shaped ground survey flat tunnel based on a micro-TBM roadheader with a diameter of 1.0 m. 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-Ti...

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Problems solved by technology

[0012] The purpose of the present invention is to overcome the above-mentioned deficiencies in the prior art, provide a symmetrical wheel-shaped ground survey leveling hole excavation method based on a miniature TBM roadheader, overcome 1 in the prior art: the tunnel construction in a narrow space still stays at 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 manual drilling and blasting method has low efficiency and long exploration time, which cannot meet the needs of planning and design progress nodes, and the pyrotechnic Difficult supply of materials, soaring labor costs, 3: Due to the large changes in the lithology of the composite formation, the traditional drilling and blasting method is difficult to control the shape of the section, the stability of the cavern is poor, and the shape of the cavern is single.

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