土石方控制爆破及振动传播规律分析

Vibration Propagations Studies in the Earthwork Controlled Blasting

针对土石方控制爆破及振动传播规律,结合工程实例,在简要阐述爆破振动产生机理的基础上,深入分析了爆破振动监测及安全控制的方法。研究表明,在土石方控制爆破过程中,建筑物爆破振动速度要远大于地面振动速度,存在明显的放大效应,放大系数随着距离的增加而逐步减低,在进行控制爆破设计时,应充分考虑放大效应。

This paper presents a case history of evaluation of the vibration propagation induce by the earthwork controlled blasting.The theoretical aspects of the blasting vibration propagation in the soil and rock media are briefly introduced.The vibration monitoring and safety control of the blasting induced vibrations are also investigated.The monitoring results indicate that the vibrations on the building structures is consistently greater than that of on the ground.A magnifying effect exists and the coefficient of magnification is decreasing with the increase of the distance to the blasting source.In the practice,the effect of magnification on the building structure should be considered.