The structure of rock is extremely complicated discontinuous and heterogeneous body, its mechanics property has non-linear, anisotropism and rheology characteristic, which changed over time.

岩石的结构是极其复杂的非连续和非均质体，其力学属性具有非线性、各向异性及随时间变化的流变特性。

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The rock physics mechanics property is bad, weathering and the soil erosion are mightiness.

岩体物理力学性质较差，风化和水土流失强烈。

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Basing on the rock mechanics property of shallow tunnel under unsymmetrical pressure, a load-structure model is used to calculate internal force and displacement of tunnel lining.

根据浅埋偏压隧道围岩的力学特性，采用荷载结构模型计算隧道支护内力及变形。

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