小线间距施工隧道爆破地震影响下既有隧道围岩线性动力分析LINEAR DYNAMIC ANALYSIS ON ROCK-MEDIA OF OLD TUNNEL AFFECTED BY BLASTING VIBRATION OF NEW TUNNEL WITH SMALL LINE-CLEARANCE
阳生权
Yang Shengquan(The Mining and Metallurgy Institute of Changsha,Changsha 410012)
摘要(Abstract):
根据某大型公路隧道工程既有隧道爆破地震监测结果,针对两隧道线间距偏小的情况,结合在施工隧道爆破地震影响下的围岩应力场和位移场等的数值计算,对既有隧道及两隧道间围岩进行了线性动力分析,指出了该类条件下隧道施工和监测中应注意的问题。
In this paper,linear dynamic analysis on the circle of old tunnel and rockmedia is proceeded on the condition that the lineclearance of two tunnels is small,according to the result of the blasting vibration test and measure of old tunnel,combined with the calculation of the stress and displacement etc.of rockmedia affected by digging of new tunnel.At the same time,it is proposed some problems which should be paied attention to in similar engineering.
关键词(KeyWords):
小线间距隧道,爆破震动,线性动力分析
Smalll ineclearance tunnel Blasting vibration Linear dynamic analysis
基金项目(Foundation):
作者(Author):
阳生权
Yang Shengquan(The Mining and Metallurgy Institute of Changsha,Changsha 410012)