从隧道不同开挖顺序出发，对浅埋偏压隧道采用预留核心土开挖方法施工过程进行了数值模拟研究，给出了不同开挖顺序下围岩和支护结构的变形及应力分布规律。结合分布规律，从而确定偏压作用对隧道围岩的影响，制定合理的施工顺序，并指出对隧道重点监控与关注部位。所得结论，可作为浅埋偏压隧道类似工程施工设计的理论依据。

  Based on different tunnel excavation sequences, the authors make numerical simulation on shallow tunnels under unsymmetrical pressure that are excavated by core soil keeping method and obtain the rules of deformation and stress distribution of rock mass and support structure under different excavation sequences. On basis of these rules, the authors evaluate the effect of the unsymmetrical pressure on the rock mass of the tunnel, recommend reasonable excavation sequence and point out the positions that need special monitoring and attention. The conclusion of this research can provide theoretical basis for construction design of similar tunnels in the future.