爆破作业对临近建筑物振动舒适性的影响分析

Vibration serviceability analysis of buildings near the area of blasting operation

爆破会产生明显的地面振动从而引起临近建筑物的振动,评估这些振动对周边建筑物的影响是工程中经常面临的问题,结合典型案例介绍了爆破对周边建筑物影响的评估过程。通过观测周围建筑裂缝状况,测定离起爆点最近建筑处地面运动速度和地面、楼面运动加速度,结果表明所面临的问题不是一个安全性问题,而是一个典型的振动舒适性问题,进一步评估了居住区的振动舒适性,并结合振动剂量法估计了爆破作业对居民居住舒适性的影响程度和影响范围。

Blasting operation results in ground vibration,which can further excite the building vibration.An evaluation of the vibration effects on surrounding buildings is often required before and/or after a blasting operation.A typical case was analyzed to explain the evaluation procedure.Through observing the cracks on the building and recording the histories of ground vibration velocities and building vibration accelerations at the nearest site,it is found that the vibrations have no damage effects on the buildings but they can seriously annoy the occupants.It's a typical vibration serviceability problem so that human vibration standard and vibration dose value(VDV) were introduced to analyze the impact level and impact range of blasting induced vibration.