文档介绍：第 29 卷第 1 期岩土工程学报
2007 年 1 月 Chinese Journal of Geotechnical Engineering Jan., 2007
小净距交叉隧道爆破振动响应研究
赵东平,王明年
(西南交通大学土木工程学院,四川成都 610031)
摘要:新建隧道从既有公路隧道上方穿过,在空间上形成交叉隧道。上下隧道最小净距为 m,为评价新建隧道爆
破施工对既有公路隧道结构的影响,进行了数值模拟研究。结果表明:当新建隧道在距离隧道交叉点 10 m 以外位置以
全断面法爆破施工时,下方既有公路隧道仅受到较小的影响;当其在距离交叉点 10 m 以内位置以全断面法爆破施工时,
既有公路隧道二次衬砌振动速度超标,而采用台阶法爆破施工时,新建隧道可安全通过。
关键词:小净距;交叉隧道;爆破振动;振动速度
中图分类号: 文献标识码:A 文章编号:1000–4548(2007)01–0116–04
作者简介:赵东平(1979–),男,黑龙江嫩江人,博士研究生,主要从事地下工程及理论方面的研究。E-mail:
dpingzhao@。
Study on influence of blasting vibration on cross tunnels with small clearance
ZHAO Dong-ping, WANG Ming-nian
(School of Civil Engineering, Southwest Jiaotong University, Chengdu 610031, China)
Abstract: A new tunnel was built to cross over the existing tunnel. The smallest clearance was m between the upper and
lower tunnels. The effect of blasting that the newly-built tunnel exerted on the existing tunnel structure was evaluated by
numerical simulation method. It was indicated that when the rock was blasted with the full face method at a distance of more
than 10 m to the cross point, the impact acting on the existing tunnel was relatively small. On the other hand, when the distance
was less than 10 m, the vibration speed of the second lining of the existing tunnel exceeded the standard. While the rock was
blasted with stepped metho