期刊论文

Analysis of Influence of Drilling and Blasting Construction on Surrounding Rock Damage of Multi-arch Tunnel Based on Energy Method

中文

中国公路学报

1001-7372

2019

32

9

143-151,182

10.19721/j.cnki.1001-7372.2019.09.014

国家自然科学基金项目（51678073）；

本校为第一机构

以采用无导洞钻爆法施工的云南省武定至易门高速公路三台坡连拱隧道工程为依托,针对爆破施工对无导洞连拱隧道围岩造成损伤的问题,利用能量衰减公式推导隧道围岩振动速度衰减公式;采用FLAC3D软件计算分析实际工程围岩振动速度以验证理论推导公式的准确性,并计算分析在爆破荷载作用下连拱隧道围岩、中墙的振动速度和振动位移的变化规律.研究结果表明:振动速度的理论计算结果和数值模拟结果之间的相对误差较小,说明基于理论推导得到的隧道围岩振动速度计算公式是可靠的;爆破过程中产生的能量以地震波的形式向外传播,当地震波传至地表仍未完全衰减时,未完全衰减的能量将以反射波的形式继续衰减;爆破...

The aim of this study was to address the problem of surrounding rock damage caused by blasting construction in a multi-arch tunnel without an advancing middle drift, based on the drilling and blasting construction of the Santaipo multi-arch tunnel without middle drifts at the Wu-ding to Yi-men Expressway in Yunnan Province. The attenuation formula of vibration velocity was derived by applying the attenuation formula of blasting energy. The results of the derivation formula were compared with those of a numerical simulation using FLAC3D software...