A blasting parameter optimization method to ensure the safety of ground buildings

Abstract

The invention discloses a blasting parameter optimization method capable of guaranteeing safety of above-ground structures. The blasting parameter optimization method comprises the steps that a blasting testing program is formulated; blasting is carried out according to the testing program, three sets of testing data of all measuring points in the vertical direction, horizontal radial direction and horizontal tangential direction are obtained, and the set of testing data which the maximum peak velocity arithmetic mean value corresponds to are taken as analyzing data; a v-f calculation model and a blasting vibration velocity model of a blasting zone are solved; the peak value vibration velocity and the main frequency in the initial blasting design program are solved; the peak value vibration velocity and the main frequency contrast with an existing blasting vibration safe and permitted standard point by point, the initial blasting design program corresponding to the peak value vibration velocity and the main frequency which do not conform a safety regulation for blasting is adjusted until the blast vibration safety allowance standard is met. The method is high in applicability, operation is simple, civil and economic disputes and construction delay caused by blasting vibration damage to the above-ground structures can be avoided, and the economical benefits of construction sides are greatly improved.

Description

technical field [0001] The invention relates to a blasting design parameter optimization method, in particular to a blasting parameter optimization method for ensuring the safety of ground buildings, and belongs to the field of safety evaluation and control of blasting earthquake effects. Background technique [0002] Drilling and blasting method is the most economical and effective method of excavation in earthwork engineering, and it is widely used in the construction of urban shallow tunnel excavation, building foundation pit excavation, underground space engineering, mine construction engineering, and water conservancy and hydropower engineering. Many blasting operation areas are relatively close to ground buildings, and the seismic effect of blasting is prominent. If the blasting design is slightly improper, the blasting seismic waves generated will cause the walls and concrete of the buildings on the ground to crack, the paint will fall off, and the glass of the doors ...

AI Technical Summary

Problems solved by technology

Although this technology is too conservative to protect the seismic safety of ground buildings, the excavation speed is low, which greatly reduces the construction efficiency.

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