结合青藏铁路格拉段目前唯一的支挡结构———L型挡墙这一工程措施,对比研究了土压力和冻胀力的几种受力分析模式,确定了对粗颗粒填料不考虑冻胀力的土压力分析模式。此外通过多年冻土地区的现场观测,验证了实际受力状态与设计应力状态的关系,提出考虑多年冻土特点的土压力修正分析模型,为今后类似工程的设计、施工提供了参考依据。 Combined with the engineering design of the L-type retaining wall, the only retaining structure in the Gela section of the Qinghai-Tibet Railway, several stress analysis models of earth pressure and frost heave force were contrasted. It is determined that the frost heaving Earth’s stress analysis model. In addition, through the field observation in permafrost regions, the relationship between the actual stress state and the design stress state is verified. The earth pressure correction analysis model considering the characteristics of permafrost is proposed, which provides a reference for the design and construction of similar projects in the future.