铁路路基设计主要控制指标设计原则的回顾与讨论  

Review and Discussion on Design Principles of Main Control Indexes in Railway Subgrade Design

作　　者：王威 裴鑫[1,2] 陈诚 刘宙 杨成忠 WANG Wei;PEI Xin;CHEN Cheng;LIU Zhou;YANG Chengzhong(State Key Laboratory of Performance Monitoring and Protecting of Rail Transit Infrastructure,Nanchang 330013,China;School of Transportation Engineering,East China Jiaotong University,Nanchang 330013,China;Nanchang Railway Survey and Design Institute Co.,Ltd.,Nanchang 330002,China)

机构地区：[1]轨道交通基础设施性能监测与保障国家重点实验室,南昌330013 [2]华东交通大学交通运输工程学院,南昌330013 [3]南昌铁路勘测设计院有限责任公司,南昌330002

出　　处：《铁道标准设计》2025年第1期29-35,共7页Railway Standard Design

基　　金：江西省自然科学基金项目(20212BAB204016,20181BAB216030)。

摘　　要：为保证铁路路基的安全与稳定,一般需要确保地基承载力、路堤稳定性及路基工后沉降均满足设计要求,但当前对于地基承载力是否需要检算这一问题还未达成共识。为此,基于ABAQUS建立铁路路基有限元模型,考虑地基土土性、地基坡率、路基土土性、路基坡率、路基填高的影响,通过定量分析,探讨地基承载力检算的必要性,并分析不同因素对地基承载力、路堤稳定性和路基工后沉降的影响规律。研究结果表明:在铁路路基设计时应考虑地基承载力的影响,并与路堤稳定性和路基工后沉降共同进行检算;地基承载力大小与地基土土性、路基土土性、路基填高等因素密切相关,在铁路路基设计时,地基承载力计算需要根据地基土土性、路基土土性和路基填高等因素综合确定;不同影响因素对地基承载力、路堤稳定性与路基工后沉降大小的影响显著性关系有所不同,其中各因素对地基承载力大小的影响显著性依次为地基土土性>路基填高>路基土土性>路基坡率>地基坡率,对路堤稳定性大小的影响显著性依次为地基土土性>路基坡率>路基土土性>路基填高>地基坡率,对路基工后沉降大小的影响显著性依次为地基土土性>路基土土性>路基填高>地基坡率>路基坡率。研究成果可为高速铁路路基设计提供参考。To ensure the safety and stability of the railroad foundation,it is generally necessary to satisfy the design requirements for foundation bearing capacity,subgrade stability,and post-construction settlement.However,there is currently no consensus on whether foundation bearing capacity needs to be verified and checked.For this reason,a finite element model of a railway subgrade is established using the ABAQUS software and taking into account factors such as foundation soil properties,foundation slope,subgrade soil properties,subgrade slope,and subgrade fill height.Through quantitative analysis,this study explores the necessity of verifying the foundation bearing capacity and analyzes the influence laws of different factors on the foundation bearing capacity,subgrade stability,and post-construction settlement.The research findings indicate that the foundation bearing capacity should be considered in the design of railway subgrade and verified along with the subgrade stability and post-construction settlement.The magnitude of the foundation bearing capacity is closely related to factors such as foundation soil properties,subgrade soil properties,and subgrade height.Therefore,the calculation of the foundation’s bearing capacity in railway subgrade design needs to be determined comprehensively,considering factors such as foundation soil properties,subgrade soil properties,and embankment height.Therefore,in the design of railway subgrade,the calculation of foundation bearing capacity needs to be determined comprehensively based on factors such as foundation soil properties,subgrade soil properties,and subgrade height.The significance of different factors on the foundation bearing capacity,subgrade stability,and post-construction settlement varies.The order of significance for the foundation bearing capacity is arranged as the following:foundation soil properties>subgrade height>subgrade soil properties>subgrade slope>foundation slope.The order of significance for subgrade stability is shown as the following:foundatio

关 键 词：铁路路基 设计控制指标 地基承载力 路堤稳定性 路基工后沉降 正交试验 

分 类 号：U213.1[交通运输工程—道路与铁道工程] TU470[建筑科学—结构工程]