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隧道围岩顺层滑动和偏压,系指在具有一定倾斜角度的单斜构造的成层岩层中,由于开挖隧道,造成洞壁部分分离岩体(块)沿既定的层状软弱结构面(带或夹层),向洞内临空面产生顺层滑(蠕)动、压缩而出现一侧明显偏压的现象。这种现象,岩层倾向侧围岩的压力远较另一侧围岩的压力大,当隧道衬砌结构未考虑因这种地质条件而产生的明显偏压时,压力大的一侧的衬砌常被剪断破坏。这种现象如果不能在施工和运营
The sliding and biasing of the wall rock around the tunnel means that in the strata with monoclinic structure with a certain inclination angle, due to the excavation of the tunnel, part of the separation wall (block) along the wall of the tunnel is along the established layered weak structural plane. (With or interlayer), the phenomenon of biasing occurs on the free surface of the hole, resulting in beveling (creep) movement and compression. In this phenomenon, the pressure of the rock surrounding the surrounding rock mass is far greater than the pressure of the surrounding rock. When the tunnel lining structure does not take into account the obvious bias due to this geological condition, the lining on the high pressure side is often Cut and destroy. If this phenomenon cannot be constructed and operated