Underground large-scale cave depot project sphere-cylinder combination excavation method

Abstract

The invention belongs to the technical field of large-scale cave depot project sphere-cylinder combination excavation, particularly relates to an underground large-scale cave depot project sphere-cylinder combination excavation method, and solves the problems about excavation and muck removal of an underground large-scale cave depot sphere-cylinder combination. The method includes the steps: (1) for passage excavation, excavating an upper passage and a lower passage, and excavating a spherical-crown-shaped loading space in the lower part of a tank chamber; (2) for tank cap excavation, excavating downwards from the center of a tank cap to form a shaft to have the tank chamber vertically communicated, directly pushing muck into the shaft, raking the muck in a matched manner, and conveying the muck to a muck disposal area with a dumper from the lower passage, wherein tank cap excavation is carried out in upper and lower parts; (3) for tank body excavation, adopting a down-hole drill to excavate inner rock mass in the middle of a tank body by a method for excavating from the center to the periphery radially step by step, and adopting an air driving drilling machine to excavate the edge of the tank body. All processes are linked orderly, equilibrium in production is realized, multi-process synchronous construction and parallel operation can be carried out, and time limit for a project is guaranteed.

Description

technical field [0001] The invention belongs to the technical field of excavating a ball-column combination for large-scale cavern engineering, and in particular relates to an excavation method for a ball-column combination for underground large-scale cavern engineering. Background technique [0002] For the excavation construction of the ball-column combination in the large-scale cavern project, the method currently adopted is: the tank cap is excavated from the middle passage to the straight strips on both sides at full height, and the tank body is excavated step by step. The disadvantages of this method are: [0003] 1) The excavation height of the spherical crown-shaped tank cap is 7m, and the one-time excavation height is too large. During the excavation process, a scaffolding construction platform needs to be erected, which is labor-intensive and time-consuming. Net installation and sprayed concrete construction; straight strip excavation from the middle passage to bo...

AI Technical Summary

Problems solved by technology

[0003] 1) The excavation height of the spherical crown-shaped tank cap is 7m, and the one-time excavation height is too large. During the excavation process, a scaffolding construction platform needs to be erected, which is labor-intensive and time-consuming. Net installation and sprayed concrete construction; straight strip excavation from the middle passage to both sides, because the excavation line of the tank roof is a curve, the curvature is always changing, and it is difficult to control the excavation line

[0004] 2) The excavation method of the cylindrical tank body is excavated step by step and layered. During the excavation process, it is easy to cause too much muck accumulation on the layered steps, and it is necessary to manually remove the muck. The construction period is lengthened, labor-consuming and time-consuming

And after the excavation of the first layer is completed, when the second layer is excavated, due to the limitations of the construction platform, the excavation operation is more difficult

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