基于足尺模型试验的泡沫轻质土加筋路堤变形研究  

Study on the deformation of reinforced lightweight soil embankments based on full‑scale model tests

作　　者：饶登宇 王希希 周武召 郑国徽 褚耀光 方程 RAO Dengyu;WANG Xixi;ZHOU Wuzhao;ZHENG Guohui;CHU Yaoguang;FANG Cheng(Guangzhou Expressway Co.,Ltd.,Guangzhou Guangdong 510308,China;School of Civil Engineering,Chongqing Jiaotong University,Chongqing 400074,China;Chongqing Yuxiang Multi‑line Expressway Co.,Ltd.,Chongqing 408515,China)

机构地区：[1]广州市高速公路有限公司,广东广州510308 [2]重庆交通大学土木工程学院,重庆400074 [3]重庆渝湘复线高速公路有限公司,重庆408515

出　　处：《钻探工程》2024年第4期111-116,共6页Drilling Engineering

基　　金：国家重点研发计划(编号:2022YFC3002603);川渝重点研发计划(编号:CSTB2022TIAD-CUX0016);新疆科技厅重点项目(编号:2022B03033-2)。

摘　　要：泡沫轻质土及土工格栅在治理山区软土路基病害中均有重要作用,得到了广泛的应用。单独应用泡沫轻质土存在很大的局限性,将泡沫轻质土与土工格栅的优势结合起来,对泡沫轻质土加筋路堤变形进行研究,对公路工程有着重要的意义。通过开展足尺模型试验,对泡沫轻质土路堤及泡沫轻质土加筋路堤变形进行研究,结果表明:使用泡沫轻质土加筋路堤比普通泡沫轻质土路堤可以减小沉降,也更有效地减小路基土压力,同时有助于基底土压力扩散,解决基底应力分布不均匀问题。因此,采用泡沫轻质土加筋路堤可以提高软土路基承载力,增强路基的稳定性。Foam lightweight soil and geogrids play an important role in the treatment of soft soil subgrade diseases in mountainous areas.There are great limitations in the application of foamed lightweight soil alone.As a deepening and supplement to previous research,combining the advantages of foam lightweight soil and geogrids to study the deformation of reinforced foam lightweight soil embankments is of great significance for highway engineering.Full‑scale model tests were conducted to study the deformation of foam lightweight soil embankments and reinforced foam lightweight soil embankments.The results show that using reinforced foam lightweight soil embankments can reduce settlement and more effectively decrease subgrade stress and earth pressure,while also helping to spread the base soil pressure and solve the problem of uneven distribution of base stress.Therefore,adopting reinforced foam lightweight soil embankments can improve the bearing capacity of soft soil subgrades and enhance the stability of the subgrade.

关 键 词：泡沫轻质土 加筋路堤 土工格栅 路堤沉降 土压力 足尺模型试验 

分 类 号：U416[交通运输工程—道路与铁道工程]