爆破振动效应影响评价及减震措施研究

Study on the evaluation of blast vibration effect and measures of reducing vibration

爆破地震效应是工程爆破产生的主要危害之一,如何保证工程爆破时爆区周围建筑物、基础设施等的安全运行,对爆破的地震效应进行实测和振动效应影响评价是十分必要的。以水电站左岸边坡工程爆破对右岸化工厂的影响为例,根据实测爆破振动速度和爆破振动频率,通过对测试结果线性回归分析,得到不同区域爆破地震波的传播和衰变规律。根据实测结果和数值计算,评价了左岸工程爆破对江右岸化工厂及区内建筑物的振动影响,论述了控制爆破振动强度、减小振动效应的措施。

Blast vibration is one of the main hazards of blasting engineering, therefore, how to ensure important infrastructure and buildings arround blasting , and the tests and controlling measures on blasting safety of vibration effects are all necessary. Taking the impact of blast engineering of hydroelectric power station on equipment of chemical plant and buildings, speed and frequency of blasting vibration were tested. The attenuation law of blasting waves of different area by the relationships between vibration velocity and explosive charge and the distance of dis- semination were regressed. According to the results of practically measured data and numerical caleulation, evaluation of the effects of vibration by the blasting on the left bank of the river to the chemical plants and buildings in the vicinity on the right bank. The measures to control explosion vibration strength and reduce viration were illustrated.