山区起伏地形条件下爆破振动传播规律研究

Study on Propagation Law of Blasting Vibration under Undulating Terrain in Mountainous Area

基于在贵州沿印松高速公路端公山和杨柳两处隧道附近的爆破监测数据,采用萨道夫斯基公式对端公山隧道的实测数据进行了线性回归分析,并基于实测数据与萨氏公式的差异性进行放大系数修正,采用修正后的公式对杨柳隧道监测数据进行预测,结果表明:两处隧道中,爆源距越小,峰值振动合速度与分速度的离散性均越大;进行回归分析时,爆源距越小,爆破放大系数离散性较大,超过一定距离后放大系数逐渐趋近于1,且萨氏公式对合速度的拟合度大于对分速度的拟合度;采用修正公式进行预测时,预测值均小于实测值,且对远处测点的预测精度优于近处测点。研究结果对类似工程的理论研究具有参考价值。

Based on the blasting monitoring data near the Duangongshan and Yangliu tunnels along the Yinsong expressway in Guizhou,the Sadowski formula is used to perform a linear regression analysis on the measured data of the Duangongshan tunnel.The difference between Sandusky formulev and measure data is corrected by the amplification factor,and the modified formula is used to predict the monitoring data of the Yangliu tunnel.The result shows that:In the two tunnels,with the smaller blasting source distance,the dispersion of the peak vibration combined velocity and the sub-velocity are greater.When performing regression analysis,with the smaller blasting source distance,the dispersion of the blasting amplification coefficient is greater.After a certain distance,the amplification coefficient gradually approaches 1,and the fit of the Sachs formula for the involute velocity is greater than that of the bisected velocity.When the correction formula is used to predict,the predicted values are all smaller than the actual measured values,and the prediction accuracy of the remote measuring points is better than that of the nearby measuring points.The research results have reference value for the theoretical research of similar projects.