地震状况下铁路路基边坡极限状态设计验证  

Research on the Limit State Design and Validation of Railway Slope under Seismic Condition

作　　者：李安洪[1] 郭海强[1] 王占盛[1] 李炼 LI Anhong;GUO Haiqiang;WANG Zhansheng;LI Lian(China Railway Eryuan Engineering Group Co.Ltd,Chengdu,Sichuan 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：《铁道工程学报》2021年第2期23-29,共7页Journal of Railway Engineering Society

摘　　要：研究目的:现行《铁路路基设计规范(极限状态法)》(Q/CR 9127—2018)在条文说明中给出了地震设计状况下的铁路路堤边坡极限状态设计表达式及分项系数,研究结果仍不成熟。因此,进一步完善地震设计状况下铁路路堤、路堑边坡的极限状态设计表达式和分项系数计算体系十分必要。研究结论:(1)本文重新提出适用于地震设计状况下的铁路路基边坡(路堤、路堑)稳定性极限状态设计通用表达式,并通过改进一般分离法引入分项系数;(2)分别采用极限状态法及总安全系数法对大量铁路路基(路堤、路堑)边坡算例进行设计验证;(3)提出的地震设计状况下路基极限状态设计通用表达式及分项系数能够有效减小设计偏差;(4)本研究结果可解决地震工况下铁路路基边坡极限状态设计"无规可依"的问题。Research purposes:The Code for Design of Railway Earthworks(Limit State Method)(Q/CR 9127—2018)presents the design expression and partial coefficient of the railway embankment slope under seismic condition in the commentary,and the research results of limit state design of railway slope under seismic condition are still immature.So,it is necessary to improve the limit state design expression and partial coefficient calculation system of railway embankment and cutting slope under seismic condition.Research conclusions:(1)This paper proposes the general expression of limit state design of railway subgrade slope(embankment&cutting)under seismic condition and introduces the partial factors by improving general separation method.(2)A lot of calculation examples of railway subgrade slope are taken for design verification by the limit state method and the total safety coefficient method.(3)The general expression and partial coefficient of the subgrade limit state design under seismic condition can effectively reduce the design deviation.(4)The research results can solve the problem of no codes to stick to existing in the current limit state design of railway slope under seismic condition.

关 键 词：地震 边坡 极限状态 设计表达式 设计验证 分项系数 

分 类 号：U213.1[交通运输工程—道路与铁道工程]