铁路路基挡土墙结构由容许应力法转换为极限状态法的试设计比较分析

Comparative Analysis of Trial Design for Railway Subgrade Retaining Wall Structure Transition from Allowable Stress Design to Limit State Design

通过运用容许应力法与极限状态法2种不同设计方法,对铁路路基实际工点中的重力式挡土墙进行试设计,并对设计计算结果进行比较、分析,提出2种设计方法的优缺点以及容许应力法向极限状态法转变的可行性与必要性。最后,分析了设计计算过程中存在的问题,并对《铁路路基极限状态法设计暂行规范》(Q/CR 9127—2015)中重力式挡土墙部分分项系数的修改完善提出相关建议。

The trial design of gravity retaining wall in actual project of railway subgrade was implemented by using two different design methods which were allowable stress design method and limit state design method.The design calculation results were compared and analyzed,the advantages and disadvantages of these two design methods were discussed,and the feasibility and necessity of the transition fromallowable stress design method to limit state design method were proposed.The problems in the design calculation process were analyzed,and relevant suggestions for modification scheme of partial coefficient of gravity retaining wall in Interimcode for limit state design of railway subgrade（Q/CR9127—2015） were put forward.