泡沫轻质土在深厚软土地基路堤中的应用探讨  

Application of Foamed Light Soil in Deep Soft Foundation Embankment

作　　者：李玲英 LI Lingying(Kunming Municipal Engineering Design and Research Institute(Group)Co.,Ltd.,Kunming,Yunnan 650228,China)

机构地区：[1]昆明市政工程设计研究院(集团)有限公司,云南昆明650228

出　　处：《山西交通科技》2024年第1期39-42,共4页Shanxi Science & Technology of Transportation

摘　　要：以某软弱下卧层上的填方路堤为对象,阐述了应力补偿原理,并利用有限元软件模拟分析了换填泡沫轻质土道路的沉降及应力变化规律。分析结果表明:利用传统路基填筑材料修筑路堤时路基的沉降和差异沉降均较大,对软弱下卧层产生较大的附加应力,道路容易产生裂缝;利用泡沫轻质土换填处治软弱下卧层时,路基沉降和软弱下卧层顶竖向附加应力均随换填深度的增加而逐渐减小。综合考虑道路处治效果和耐久性等因素,拟推荐换填4 m方案为该填方道路的处治方案。In this paper,based on the filled embankment on a soft substratum,the principle of stress compensation was stated.The finite element software was used to simulate the change laws of settlement and stress of the road filled with foamed light soil.The analysis showed that both the settlement and differential settlement of the subgrade were large when using the conventional subgrade filling materials to repair the embankment,which would cause additional stress to the soft substratum,resulting in cracks on the road.While using the foamed light soil to treat the soft substratum,the subgrade settlement and the vertical additional stress at the top of the soft substratum gradually decreased with the filling depth.Comprehensively considering the treatment effect,durability,and other factors,the treatment scheme of filling within 4 m was recommended.

关 键 词：泡沫轻质土 软弱下卧层 沉降 附加应力 应力补偿 

分 类 号：U416.12[交通运输工程—道路与铁道工程]