天津建设科技2024，Vol.34Issue(6)：20-25,6.DOI:10.3969/j.issn.1008-3197.2024.06.006
间隔条形改良软基处理改扩建路堤承载变形数值分析
Numerical Analysis of Bearing Deformation of Embankment for Trench Excavation Replacement and Soft Foundation Reconstruction and Expansion
摘要
Abstract
In view of traditional replacement and in-situ solidification of foundation treatment methods have shortcom-ings such as large engineering volume and poor economic efficiency.This paper proposes the use of trenching and replacement to treat soft soil foundations in highway renovation and expansion projects.Based on the actu-al renovation and expansion project of a certain highway,a numerical analysis method that can better reflect the characteristics of trenching and replacement foundation treatment was established and verified.The work-ing mechanism and failure mode of the trenching and replacement foundation treatment method were re-vealed,and the concept of replacement ratio was introduced,analyzed the influence of replacement ratio and replacement materials on the load-bearing deformation characteristics of reconstructed and expanded embank-ments.Research has shown that excavation and replacement can significantly improve the bearing capacity of embankments and slope stability,with good economic benefits;The ultimate bearing capacity of the embank-ment decreases with the increase of replacement ratio,and increases with the increase of lime content.As the replacement ratio increases,the stability coefficient of the embankment slope gradually decreases,and at high replacement ratios,the increase in lime content has little effect on the improvement of the safety coeffi-cient of the slope.关键词
改扩建路堤/间隔条形改良/承载能力/边坡稳定性/软基Key words
reconstruction and expansion of embankments/trenching and replacement/carrying capacity/slope stabili-ty/soft foundation分类
交通工程引用本文复制引用
王健,饶亮,冯守中,孙立强,解德山,郎瑞卿..间隔条形改良软基处理改扩建路堤承载变形数值分析[J].天津建设科技,2024,34(6):20-25,6.基金项目
国家自然科学基金(52078336) （52078336）
中国博士后基金面上项目(2022M721000) （2022M721000）
中国科协青年托举工程(YESS20230586) （YESS20230586）
天津市研究生科研创新项目(2022SKYZ179) （2022SKYZ179）
