铁路路基边坡极限状态设计统一性研究  

Study on the Unification of Limit State Design of Railway Subgrade Slope

作　　者：郭海强[1] 徐骏[1] 李安洪[1] 李炼 GUO Haiqiang;XU Jun;LI Anhong;LI Lian(China Railway Eryuan Engineering Group Co.,Ltd.,Chengdu 610031,China)

机构地区：[1]中铁二院工程集团有限责任公司,成都610031

出　　处：《路基工程》2021年第4期1-6,共6页Subgrade Engineering

基　　金：中铁二院工程集团有限公司企业计划研究课题:基于可靠度的铁路边(滑)坡稳定性极限状态法设计关键技术研究(KYY2019143(19-21));可靠性设计标准指标体系的统一性研究(KYY2018075(18-20))。

摘　　要：针对《铁路路基设计规范(极限状态法)》(Q/CR 9127—2018)对铁路路堤边坡、路堑边坡、路堤及地基的整体稳定性检算给出3种极限状态设计表达式及分项系数,给设计者使用带来了较大困惑,对比分析国内外岩土标准,研究关于边坡及堤坝稳定性极限状态设计表达式及分项系数的差异;结合前期的研究成果,确定极限状态方程及分项系数的通用表达形式;通过工程实例验证了稳定性极限状态方程及分项系数。结果表明:铁路路堤边坡、路堑边坡、路堤及地基的整体稳定性的极限状态方程及分项系数存在统一的可行性。Based on Code for Design of Railway Subgrade(Limit State Method)(Q/CR 9127—2018),it gives three kinds of limit state design expressions and partial coefficients in terms of the railway embankment slope,cutting slope and check and calculation of the overall stability of the embankment and foundation,however,it also brings great confusion to the designer.The differences of limit state design expressions and partial coefficients are studied by comparing and analyzing the domestic and foreign geotechnical standards.The general expression of limit state equation and partial coefficient is proposed based on the previous research results.The stability limit state equation and partial coefficient are verified by the project case.The results show that it is feasible to unify three kinds of limit state equation and partial coefficients of railway embankment slope,cutting slope,and overall stability of embankment and foundation.

关 键 词：路堤边坡 路堑边坡 路堤及地基的整体稳定性 极限状态 设计表达式 分项系数 统一性 

分 类 号：U213.1[交通运输工程—道路与铁道工程]