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以拟静力法为基础,通过地震力偏角的旋转,结合极限平衡条件,推导出地震作用下浅埋偏压隧道围岩压力的解析解,并探讨了其影响因素.研究发现地震侧压力系数受岩土体力学指标的影响明显.在地震力作用下,竖向地震加速度系数使拱顶总垂直压力值减少,多数情况下会降低地震侧压力系数;水平向地震加速度系数对总垂直地震压力和地震侧压力系数的影响规律取决于水平地震力的方向.浅埋侧的地震侧压力系数随着地面倾角的增大而减小,而深埋侧的地震侧压力系数随着地面倾角的增大而增大.
Based on quasi-static method, the analytical solution of surrounding rock pressure of shallow buried tunnel under seismic action is deduced by the rotation of seismic deflection angle and the limit equilibrium condition, and the influencing factors are discussed. It is found that the lateral pressure Under the action of seismic force, the vertical seismic acceleration coefficient decreases the total vertical pressure value of the vault, and in most cases, it decreases the pressure coefficient on the seismic side. The horizontal seismic acceleration coefficient has no significant effect on the total vertical earthquake The influence law of pressure and seismic lateral pressure coefficient depends on the direction of horizontal seismic force.The seismic side pressure coefficient of shallow buried side decreases with the increase of ground inclination, while the seismic side pressure coefficient of deep buried side varies with ground inclination Increase and increase.