熊渡隧道小净距段爆破振动监测与分析

结合熊渡隧道群爆破震动监控量测实践，阐明小净距隧道在爆破震动作用下的动态响应规律。结果表明：近爆源作用下的临近隧道应引入多参数的震动安全判据来执行严格的爆破控制；震动速度主要取决于爆心距和测点位置，爆心距越小震动速度越大；中夹岩墙上的爆破震动速度最大，其次是拱肩、拱脚上的测点；各测点的径向震动速度大于垂向，垂向大于切向；震动频率是径向小于切向，切向小于垂向，并且各测点切向震动速度和频率都接近于三矢量合成后的速度和频率。所以，相似条件下隧道爆破震动控制可以只监测与爆源断面相同的中夹岩墙上的径向震动，从而简化爆破震动监测。

Blasting Vibration Monitoring and Analysis of Short Clear Distance Section in Xiongdu Tunnel

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.