本构模型对软土路基沉降的适用性研究  

Applicability Study of Constitutive Models in Settlement of Soft Soil Roadbed

作　　者：李冰 LI Bing(Anyang Construction Engineering Quality Safety and Fire Protection Technology Center,Anyang 455000,China)

机构地区：[1]安阳市建筑工程质量安全和消防技术中心,河南安阳455000

出　　处：《安阳师范学院学报》2023年第5期95-99,共5页Journal of Anyang Normal University

摘　　要：以安阳某填筑预压处理的软土路基为研究对象,采用有限单元法,分别基于MC、HS和HSS本构模型,研究路基固结变形特性,并将计算结果与现场监测数据进行对比分析。分析表明:采用MC模型计算的固结速度快,沉降量偏大,最终沉降量较监测值偏大超过20%,且荷载对路基的影响范围和影响深度也偏大;采用HS模型计算结果较监测值稍微偏大;采用HSS模型计算的沉降趋势和沉降量与监测值都比较吻合,更适用于软土地基沉降预测。In order to study the effect of soil constitutive relationship on the settlement of soft soil subgrade in the process of filling construction,a soft soil subgrade in Anyang City was studied.The consolidation deformation characteristics of the subgrade were studied using finite element method based on the constitutive models of MC,HS and HSS,and the calculated results were compared with the field monitoring data.The analysis shows that:The consolidation rate calculated by MC model is fast,the settlement amount is large,and the final settlement amount is more than 20%larger than the monitored value,and the influence range and depth are also larger,the calculation result of HS model is slightly larger than the monitored value,while the settlement trend and settlement amount calculated by HSS model are similar to the monitored value,and it is more suitable for the settlement prediction of soft soil foundation.

关 键 词：软土路基 固结沉降 本构模型 数值模拟 

分 类 号：U416.1[交通运输工程—道路与铁道工程]