Deep foundation pit lithosphere blasting protection method

Abstract

The invention relates to the underground construction, in particular to the deep foundation pit lithosphere blasting. A deep foundation pit lithosphere blasting protection method comprises the step of carving a wound surface, exceeding each blasting depth, on at least one edge of the outermost lap of a foundation pit lithosphere required to be blasted by mechanical carving or blasting carving. The method can guarantee no influence on surrounding environment from blasting shock waves in the blasting operation so as to reduce or prevent the potential safety hazard of the surrounding environment caused by the blasting shock waves.

Description

technical field [0001] The invention relates to underground construction, in particular to rock layer blasting of deep foundation pits. Background technique [0002] When the deep foundation pit construction encounters rock layers, blasting construction is required. The vibration waves generated during the blasting in the foundation pit will have an impact on sensitive parts in the surrounding area, especially electrical instruments, deep foundation pits near the excavation, and easily After encountering the impact vibration of blasting shock waves, flammable and explosive facilities and structures will experience abnormal damage, collapse, leakage and falling off of external objects, which will bring great safety hazards to the construction and surrounding environment. [0003] At present, the protection method of deep foundation pit blasting to reduce the blasting shock wave mainly adopts shallow multi-explosion point blasting, which can reduce the impact of deep foundatio...

AI Technical Summary

Problems solved by technology

[0002] When the deep foundation pit construction encounters rock layers, blasting construction is required. The vibration waves generated during the blasting in the foundation pit will have an impact on sensitive parts in the surrounding area, especially electrical instruments, deep foundation pits near the excavation, and easily After encountering the impact vibration of the blasting shock wave, inflammable and explosive facilities and structures will experience abnormal damage, collapse, leakage and falling off of external objects, which will bring great safety hazards to the construction and surrounding environment.

[0003] At present, the protection method of deep foundation pit blasting to reduce the blasting shock wave mainly adopts shallow multi-explosion point blasting, which can reduce the impact of deep foundation pit blasting blast point on the blasting area surrounding the shock wave. Although this technology can effectively reduce the During the blasting process, the energy of the base shock wave in the blasting area, but the depth of each blasting construction is limited, and there are many blasting points, resulting in long blasting construction period, more blasting chemicals, and long blasting construction period around the construction area. Therefore, the design of this blasting Protection method