摘要
为研究高路堤动态填筑全过程沉降变形特性,基于非线性有限元数值模拟,对比分析高路堤与一般路堤分层动态填筑过程中地基面沉降、路堤面沉降和坡脚处地基剖面侧向位移的分布演变规律,讨论填料轻质化、压实度提高对沉降变形的影响。研究发现:高路堤分层填筑全过程中堤身荷载不容忽视,采用轻质填料可极大减小高路堤的压缩变形和地基沉降;随着压实度的提高,如路堤填土弹性模量增加2倍,高路堤路基面沉降则减小16.9%,而地基面沉降和坡脚处地基剖面侧向位移影响甚微。
To study the settlement deformation characteristics of high embankments during the dynamic filling process,nonlinear finite element numerical simulation was used to compare and analyze the foundation settlement,embankment settlement,and lateral displacement of the foundation section at the foot of the slope.The influence of lightweight filler material and increasing compaction on settlement deformation was also studied.The study found that high embankment body load cannot be ignored in the entire process of layered embankment filling.Compression deformation and foundation settlement of the embankment body can be significantly reduced and the application of lightweight packing should be taken into consideration.As the degree of compaction increased,the elastic modulus of the embankment soil increased by a factor of 2 and the settlement of high embankment subgrade decreased by 16.9%,whereas the settlement of the foundation surface and lateral displacement of the foundation section at the foot of the slope were not significantly affected.
作者
刘美芳
蒋鑫
陈晓丽
邱延峻
LIU Mei-fang;JIANG Xin;CHEN Xiao-li;QIU Yan-jun(School of Civil Engineering,Southwest Jiaotong University,Chengdu 610031,China;Highway Engineering Key Laboratory of Sichuan Province,Southwest Jiaotong University,Chengdu 610031,China;MOE Key Laboratory of High-speed Railway Engineering,Southwest Jiaotong University,Chengdu 610031,China)
出处
《交通运输工程与信息学报》
2020年第1期61-67,76,共8页
Journal of Transportation Engineering and Information
基金
四川省科技计划资助项目（2019YFS0492）
国家自然科学基金资助项目（51378440）
关键词
高路堤
动态施工
数值模拟
沉降变形特性
轻质填料
压实度
high embankment
dynamic construction
numerical simulation
settlement deformation characteristics
lightweight filler
compaction degree
