下穿引水隧洞爆破振动影响新建铁路隧道响应测试  

Measurement on effects of blasting excavation of underpass diversion tunnel on the response of newly-built railway tunnel

作　　者：田运生[1] 费鸿禄[2] 左金库[1] 王宁[1] 

机构地区：[1]石家庄铁道大学土木工程学院,河北石家庄050043 [2]辽宁工程技术大学爆破技术研究院,辽宁阜新123000

出　　处：《辽宁工程技术大学学报（自然科学版）》2013年第9期1166-1171,共6页Journal of Liaoning Technical University (Natural Science)

基　　金：河北省自然科学基金资助项目(E2011210013)

摘　　要：为解决爆破开挖下穿引水隧洞对新建铁路隧道爆破振动影响问题,采用现场监测的方法,研究了既有隧道对爆破振动的响应.结果表明:引水隧洞爆破时,在相同爆破参数、相同距离条件下,掌子面靠近既有隧道时的爆破振动速度大于离开时的爆破振动速度;同一测试断面内,迎爆面的质点峰值振动速度最大,背爆面相对较小,距离爆心距越远,这种差别越小;掏槽孔的质点峰值振动速度最大,周边孔的最小;爆破地震波频率成份丰富,但主振频率比较稳定,多数在100～200 Hz之间,主频域在30～500 Hz之间;以部分实测数据和萨道夫斯基经验公式为基础进行回归分析,建立了任意质点峰值振动速度预测公式.该成果对上下交叉近距离隧道爆破开挖及振动控制工程具有一定的参考价值和指导意义.In order to resolve the problem that the blasting excavation of underpass diversion tunnel affects on the blasting vibration of newly-built railway tunnel,the method of field monitoring was carried out and the response to the blasting vibration from the existed tunnel is studied.The results of study show that when the diversion tunnel is blasted,under the same condition of blasting parameter and distance,the blasting vibration speed at the moment that the tunnel face is close to the existed tunnel is faster than it at the opposite moment; in the same testing cross-section,the peak particle velocity in the face of blasting came to maximum and in the opposite it be relatively slow,and the further the distance to the blast center,the smaller the difference become; the peak particle velocity in cut holes is the max,and in the peripheral holes it is the minimum; the components of seismic wave frequency are abundant,but the main frequency is relatively stable,mostly between the frequencies of 100 and 200Hz and the main frequency field is between the frequencies of 30 and 200Hz; according to part of the measured data and Sadaovsky empiric formula regression analysis were established the formula to predict the peak particle velocity at any point.This achievement has certain reference value and directive significance to the blasting excavation and vibration control engineering of over crossing short-range tunnel.

关 键 词：爆破振动 隧道工程 频谱分析 振动监测 振动响应 回归分析 振速预测 铁路隧道 

分 类 号：TV554[水利工程—水利水电工程]