土体相对密度对土工格室加筋砂土地基性能的影响  

Influence of Soil Relative Density on Performance of Geocell Reinforced Sand Foundation

作　　者：杨晖 丁志辉 蔡源介 YANG Hui;DING Zhihui;CAI Yuanjie

机构地区：[1]中国瑞林工程技术股份有限公司,江西南昌330000

出　　处：《城市道桥与防洪》2022年第3期177-181,200,M0015,M0016,共8页Urban Roads Bridges & Flood Control

基　　金：梅观高速公路(清湖立交至观澜主线收费站)市政化改造工程课题研究——深圳市非机动车道透水性混凝土路面技术规程项目。

摘　　要：为了研究地基相对密度对土工格室加筋性能的影响,对五种不同相对密度(30%、40%、50%、60%和70%)的土工格室加筋砂土地基和未加筋砂土地基的模型进行载荷试验,研究不同相对密度土体地基的承载力沉降曲线、承载力提高系数、路基变形与基底沉降以及加筋拉应变的分布规律,并对土工格室加筋砂土地基的作用机理进行分析.试验结果表明,在较大的相对密度范围内,土工格室加筋可以有效地提高地基的刚度、承载力和分散荷载水平;填土表面和砂土路基的变形规律表明,所采用的模型箱和地基的相对尺寸可以克服边界效应,从而达到更好的测试效果.In order to study the influence of the relative density of the foundation on the reinforced performance of geocells,the loading tests are carried out on the models with five different relative densities(30%,40%,50%,60%and 70%)of geocell reinforced sand foundations and unreinforced sand foundations to study the bearing capacity settlement curves,bearing capacity improvement coefficients,roadbed deformation and subgrade settlement,and the distribution of reinforced tensile strain for the different relative densities of soil foundations.And the mechanism action of geocell reinforced sand foundation is analyzed.The results of the tests show that the reinforced geocell can effectively improve the rigidity,bearing capacity and load distributing level of the foundation in the wide range of relative density.The deformation rule of the filling surface and sand foundation show that the relative dimensions of the used model box and foundation can overcome the boundary effect so as to achieve the better test results.

关 键 词：加筋地基 土工格室 相对密度 模型试验 承载力 

分 类 号：U41[交通运输工程—道路与铁道工程]