Deep foundation pit lithosphere blasting protection method

A technology of rock formations and deep foundation pits, applied in the field of underground construction, can solve problems such as long blasting construction period, excessive blasting chemicals, and falling off of external objects, achieve good economic and social benefits, shorten construction period, and avoid potential safety hazards Effect

Inactive Publication Date: 2015-04-15
CHINA MCC20 GRP CORP
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  • Abstract
  • Description
  • Claims
  • Application Information

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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

Method used

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Embodiment Construction

[0008] Below, the present invention will be further described in conjunction with specific methods: a kind of protection method of deep foundation pit rock stratum blasting of the present invention comprises: utilize mechanical creation or blasting to create at least one side of the outermost circle of need blasting foundation pit rock formation A critical surface that exceeds the depth of each blast.

[0009] Firstly, a critical surface exceeding the depth of each blasting is opened on the outermost circle of the rock layer of the foundation pit to be blasted. The critical surface can be set according to the conditions of sensitive parts around the blasting operation. When blasting the critical surface, first drill holes exceeding the number and depth of blasting holes outside the blasting hole to absorb the shock waves generated during blasting on the cutting surface. Larger shock waves are generated, and the gravel in the blasting layer is cleaned up in time after each b...

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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...

Claims

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Application Information

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IPC IPC(8): F42D5/00
Inventor 杨前
Owner CHINA MCC20 GRP CORP
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