重庆大洪河电站5号机扩建工程爆破震动监测

MONITORING OF BLASTING VIBRATION IN EXTENSION PROJECT OF UNIT NO 5 OF DAHONGHE POWERPLANT IN CHONGQING CITY

介绍了重庆大洪河电站 5号机扩建工程中爆破震动监测情况。基础开挖爆破区与原厂房最小距离不足 2m ,控制爆破震动至关重要。根据实测振动速度值 ,对监测对象进行了安全评价 ,推断出电站厂房内电器设备的安全临界振速为 3cm/s,并推荐了该类电站的震动安全控制标准。

The monitoring of blasting vibration in extension project of unit No.5 of Dahonghe Powerplant in Chongqing City is introduced. Because the minimum distance between the foundation excavation blasting area and the original powerplant is less than 2m, the control of blasting vibration is of great importance. On the basis of measured vibration velocities, the safety evaluations to the monitoring objectives are given and a critical safety vibration velocity of 3 m/s for the electric apparatus of the powerplant is derived. Furthermore, the safety criteria for blasting vibration control of the similar powerplants are proposed.