在山区修建高速铁路或公路时,为了保证线路的顺直性,选线难以对所有滑坡都进行避绕,导致隧道穿越大型滑坡的情况经常发生.在修建以及线路运营过程中,时常发生隧道拱顶开裂、隧道支护鼓胀、隧道变形严重侵限等问题.结合三个典型隧道-滑坡正交体系的具体实例,通过其施工监测变形,剖析了正交体系下隧道-滑坡在单滑面的变形特征,并分析了其受力模式.结合数值模拟和受力模式,提出了一体化加固方式,并以实例分析了其加固效果.%Line selection is difficult to avoid all landslides, in order to ensure the line straight, resulting in tunnel crossing landslide occur frequently in the construction of high-speed railway or highway in the mountains area.There are many problems in the process of line construction and line operation such as the vault cracking, the expansion of tunnel support, the serious transgression of tunnel deformation.Combined with three typical tunnel landslide examples of orthogonal system, based on monitoring of the tunnel, analysis deformation characteristics and stress model of a single sliding surface under the orthogonal system of tunnel-landslide.Based on the numerical simulation and the force model, an integral reinforcement method is proposed, and the reinforcement effect is analyzed by an example.① Under the condition of single sliding surface, this paper sums up that the deformation characteristics of tunnel with the interaction of the sliding zone and tunnel.When the sliding zone is acting on the side wall of the tunnel, the damage type is shear failure;but when the sliding zone is acting on the vault, the type of the tunnel failure is the compression shear failure, and the deformation of the arch section is the main part of the tunnel.② The calculation model of the force acted on the side wall of the tunnel is simplified, and the rationality of the simplified calculation model is verified by numerical calculation.③ Based on the interaction mode of the sliding zone on the side wall of the tunnel, the reasonable reinforcement method is put forward, in which the calculation shows that the deformation of the tunnel is well controlled.
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