中文摘要：

采用现场监测和数值模拟2种方法,对偏压连拱隧道分步开挖过程的边坡位移响应进行对比分析,结果表明：在隧道分步开挖过程中,1）隧道正上方位置边坡沉降变化最为明显,谷侧隧道上台阶开挖步为对沉降影响最为明显的开挖步;2）隧道正上方中间部位及边坡下部水平位移较大,边坡上部较小。谷侧隧道上台阶开挖步为对水平位移影响最大开挖步;3）边坡地表位移有增大趋势。开挖对边坡体位移的影响范围从隧道向上直至边坡自由面,在其他方面约为3倍隧道尺寸。其中,隧道正上方地表位移量远大于边坡上部与下部位置,谷侧隧道上台阶开挖步为边坡中部地表位移影响最大的分析步。

英文摘要：

In this paper,combining with monitoring data of an actual project and the results of numerical simulation in the process of bias multi -arch tunnel staged excavation, the authors analyze the response condition of slope displacement. It is concluded that： 1 ） in the process of tunnel staged excavation, settlement of the most obvious position of slope is above the tunnel ; 2 ） Above the tunnel and lower part of slope horizontal displacement is larger, the upper slope horizontal displacement is smaller. The excavation step of upper steps excavation of the valley side tunnel has the biggest influence on horizontal displacement in all excavation steps; 3 ） Surface displacement of slope has increasing trend. Tunnel excavation on the influence of the moved slope position to move upward from the tunnel until the free surface of slope, is about three times the tunnel in the other direction. Among them, the slope surface displacement of directly above the tunnel is greater than the upper and lower position of the surface displacement, the excavation step of upper steps excavation of the valley side tunnel has the biggest influence on surface displacement of the middle part of slope in all excavation steps.