交通荷载下有砟轨道软土地基长期沉降参数化分析  

Parametric Research of Long-term Settlement of Soft Soil Foundation with Ballast Bed under Traffic Load

作　　者：赵宏 杨富莲[1] ZHAO Hong;YANG Fulian(Department of Architecture and Civil Engineering,West Anhui University Luan 237012,China)

机构地区：[1]皖西学院建筑与土木工程系,安徽六安237012

出　　处：《广东土木与建筑》2021年第10期40-43,共4页Guangdong Architecture Civil Engineering

基　　金：安徽省教育厅基金(KJ2019A0623);安徽省课程思政项目(2020szsfkc0966);皖西学院高层次人才启动项目(WG⁃KQ201802002)。

摘　　要：高速铁路给人民生活带来了极大的便利,但是铁路路基的长期沉降问题非常难以预测。采用德国慕尼黑工业大学陆路交通实验室的沉降模型和广州软土模型,并对模型进行了改进建立新模型,分析了长期荷载对长期沉降的影响,并对道床弹性模量、道床厚度、钢轨质量、钢轨抗弯刚度等因素对长期沉降的影响进行了参数化分析。计算结果表明:道床弹性模量增大,道床沉降减小;道床厚度增加,道床沉降减小;钢轨抗弯刚度增加,路基沉降和总沉降增加;钢轨质量增加,道床的沉降量和道路总沉降量都会增加。High-speed railways have brought great convenience to people’s lives,but the long-term settlement of railway subgrades is very unpredictable.The settlement model of the Land Transport Laboratory of the Technical University of Munich and the Guangzhou soft soil model were used,and the model was improved to establish a new model The influence of long-term load on long-term settlement is ana‐lyzed,and the influence of such factors as the elastic modulus of the ballast bed,the thickness of the track bed,the quality of the rail,the bending stiffness of the rail,and other factors on the long-term settlement is analyzed.The calculation results show that:the elastic mod‐ulus of the track bed increases,and the settlement of the track bed decreases;the thickness of the track bed increases,and the settlement of the track bed decreases;the bending rigidity of the rail increases,and the settlement and total settlement of the roadbed increase;the mass of the rail increases,the settlement of the track bed and the total settlement of the road the amount will increase.

关 键 词：交通荷载 软土地基 长期沉降 循环荷载 

分 类 号：TU435[建筑科学—岩土工程]