内外组合施工扰动下隧道洞口边坡稳定性分析  

Stability Analysis of Tunnel Entrance Slope Under the Disturbance of Internal and External Combined Construction

作　　者：宋开忠 侯哲生[1] 刘媛媛 SONG Kaizhong;HOU Zhesheng;LIU Yuanyuan(School of Civil Engineering,Yantai University,Yantai,Shandong 264000,China)

机构地区：[1]烟台大学土木工程学院,山东烟台264000

出　　处：《水利与建筑工程学报》2020年第6期208-212,共5页Journal of Water Resources and Architectural Engineering

摘　　要：山区高速公路在建设过程中,隧道洞口的开挖往往容易造成洞口处滑坡。为保证隧道洞口的边坡稳定性,以邢汾高速公路清家沟隧道为依托,采用MIDAS/GTSNX有限元软件分别对该边坡在自然状态、坡脚开挖、隧道开挖、坡脚+隧道开挖四种工况下的边坡稳定性进行了数值模拟计算。结果表明:内外组合施工对隧道洞口边坡的扰动性最大,并且沿着隧道洞口向四周逐渐减小,因此需要对此处进行有效的加固处理措施。During the highways construction in mountainous areas,the excavation of tunnel can cause landslides at tunnel entrance sections.In order to ensure the stability of the slope of the tunnel entrance,by taking Qingjiagou Tunnel of Xingfen Expressway as an example,MIDAS/GTS NX finite element software was adopted to simulate the following four conditions which are separate the slope in its natural state,slope toe excavation,tunnel excavation,slope toe+tunnel.The results show that the internal and external combined construction has the greatest disturbance to the slope of the tunnel entrance,and it gradually decreases along the tunnel entrance to the surroundings.Therefore,effective reinforcement measures are highly recommended in this area.

关 键 词：内外组合施工 滑坡 边坡稳定性 隧道洞口 

分 类 号：U453.1[建筑科学—桥梁与隧道工程]