铁路路堑边坡设计极限状态法和容许应力法的对比

铁路路堑边坡设计方法正由容许应力法向极限状态法转换,本文依据Q/CR 9127—2018《铁路路基设计规范(极限状态法)》对银西(银川—西安)高速铁路路堑边坡用极限状态法进行试设计分析,并将结果与传统的容许应力法设计结果进行比较,验证极限状态法设计理论的正确性及分项系数取值的合理性,并提出铁路路堑边坡分项系数的优化意见,为规范的修编提供参考。极限状态法设计需要大量样本数据,本文研究结论尚需进一步验证和修正。

Comparison Between Limit State Method and Allowable Stress Method in Design of Railway Cutting Slope

The design method of railway cutting slope is changing from the allowable stress method to the limit state method.According to Q/CR 9127—2018 Code for Design on Railway Earth Structure(Limit State Design),the trial design analysis of cutting slope was proposed in this paper by using the limit state design in Yinchuan-Xi’an high speed railway.The results were compared with the traditional design results of allowable stress method to verify the correctness of limit state design theory and the rationality of partial coefficient.Meanwhile,the optimization suggestions of the partial coefficient of the railway cutting slope were put forward to provide reference for the revision of the relevant standards.However,since the limit state method requires a large number of sample data,the conclusions of this paper need to be further verified and revised.