关键词: 隧道, 小净距, 爆破震动监测, 动态响应规律

Abstract: According to monitoring and measurement of blasting vibration of Xiongdu tunnel, the dynamic response law on the condition of blasting vibration was explained. Results showed that the strict blasting control was executed in adjacent tunnel close to the explosion source, in which the security criterion of multi parameters of blasting vibration was used. The vibration velocity was depended on the distance of blast center and monitoring location, the shorter the distance of blast center was, the greater the vibration velocity was. The vibration velocity at tunnel wall is the maximum, the one of spandrel second, the one of wall foot minimum. The radial vibration velocity of every monitoring site was greater than the vertical which was greater than the tangential. The radial vibration frequency was smaller than the tangential which was smaller than the vertical radial vibration velocity and frequency of every monitoring site was similar to the velocity and frequency synthesized by three dimensional vector. Therefore, the blasting vibration monitoring was simplified by only monitoring the radial vibration velocity and frequency at the tunnel wall on the similar condition.