爆破地震波作用下深埋圆形隧道围岩质点振动规律研究  

On the Particle Vibration Rule of Rock Surrounding a Deeply Buried Circular Tunnel Under a Blasting Seismic Wave

作　　者：吕振利[1] 孙金山[2] 左昌群[2] 

机构地区：[1]华侨大学土木工程学院,泉州362021 [2]中国地质大学(武汉)岩土钻掘与防护教育部工程研究中心,武汉430074

出　　处：《现代隧道技术》2014年第1期38-44,共7页Modern Tunnelling Technology

基　　金：福建省自然科学基金项目(2012J01220);华侨大学科研基金资助项目;国家自然科学基金资助项目(41102196;51379194);湖北省自然科学基金项目(2012FFB06502)

摘　　要：开挖爆破产生的地震波会诱发邻近隧道的动力响应,并影响其安全和稳定。文章采用数值模拟方法,分析了爆破地震波中的P波与邻近圆形隧道的相互作用,研究了不同工况下围岩质点振动分布规律。计算结果表明,应力波通过圆洞时,围岩中质点的振动方向将在洞壁附近发生微小的偏转,同时将使洞壁附近围岩的质点振动速度大于或小于振源速度,具有显著的质点振动缩放效应。振动频率、隧道尺寸、围岩性质,以及波长-洞径比对其质点振动速度的缩放效应的影响都较为显著。Blasting-induced seismic waves may cause dynamic responses in adjacent tunnels and affect their safety and stability. With numerical simulation, the interaction between a P wave （Seismic Wave） and adjacent circular tunnels was analyzed, and the distribution rule of particle vibration under different working conditions was studied. The results show that when the stress wave is passing through the circular tunnel, particle vibration direction may be slightly deflected near the tunnel wall and the vibration velocity may be greater or less than that of the vibration source, which has an obvious scaling effect. Additionally, the vibration frequency, tunnel dimensions, surrounding rock properties, and wavelength-diameter ratio have a great influence on the scaling effect of the particle vibration.

关 键 词：圆形隧道 爆破振动 P波 数值模拟 

分 类 号：U455.6[建筑科学—桥梁与隧道工程]