滑坡体对其正交下穿隧道的变形影响

隧道正交穿过滑坡体时，会同时诱发滑坡体移动和隧道变形增大的不利局面。为了研究两者的相互作用影响，增加对滑坡体和隧道的变形认识，给隧道的设计与施工提供参考，对特克斯现场滑坡体及隧道进行了监测分析，并从隧道开挖位置与滑动带的垂直距离的角度出发，结合特克斯隧道现场滑坡体与隧道的地质情况，设计了八种不同工况下的数值模拟计算，模拟隧道开挖造成滑坡体移动后，滑坡体滑动对其正交下穿隧道的变形影响，分析研究了滑坡体下穿隧道顶部距滑动带的垂直距离对两者相互作用的规律，得出了以下结论:（1）滑坡体与其正交下穿隧道相互作用的临界影响深度在3 D（D为隧道开挖宽度）左右，此时两者相互作用很小，隧道开挖对上方滑坡体没有扰动影响。（2）当隧道在滑坡体下方开挖时，开挖位置处于滑坡体中部时对滑坡体造成的位移变化最大，而滑坡体对隧道变形影响也最大，坡脚其次，坡顶影响最小。

Effects of landslide on its orthogonal under crossing tunnelGong

When the tunnel crosses the landslide orthogonally, it will induce the unfavorable situation of the landslide movement and the tunnel deformation increase. In order to study the interaction between the two, increase the understanding of the deformation of the landslide and the tunnel, provide reference for the design and construction of the tunnel, monitor and analyze the Turks landslide and the tunnel, and excavate the position and slide from the tunnel. From the perspective of the vertical distance of the belt, combined with the geological conditions of the landslide and the tunnel of the Turks tunnel, the numerical simulation calculations under eight different working conditions are designed. After the tunnel excavation causes the landslide to move, the landslide slides on it. The influence of the deformation of the orthogonal tunnel under the tunnel is analyzed. The law of the vertical distance between the landslide and the sliding zone at the top of the tunnel is analyzed. The following conclusions are drawn: (1) The critical depth of the interaction between the landslide and its orthogonal underpass tunnel is about 3D (D is the width of the tunnel excavation). At this time, the interaction between the two is small, and the tunnel excavation has no disturbance effect on the upper landslide. (2) When the tunnel is excavated under the landslide, the displacement caused by the landslide is the largest when the excavation position is in the middle of the landslide, and the landslide has the greatest influence on the tunnel deformation, followed by the slope foot and the slope top.