【摘要】 在筑坝砂砾料三轴试样内水平铺设土工格栅,应用中型动三轴仪(试样尺寸200mm×500mm),研究了加筋(土工格栅)后砂砾料残余变形与振动次数的关系,并与不加筋的砂砾料残余变形特性进行了对比。在此基础上,采用改进的沈珠江模型分别拟合了加筋前后砂砾料的残余变形试验结果。研究表明:加筋可抑制砂砾料的残余剪切变形和残余体积变形,加筋前后的砂砾料永久变形特性均可采用改进的沈珠江模型描述,加筋后的模型参数明显降低。更多还原

【Abstract】 A dynamic triaxial experiment of sand-gravel composites are conducted by using a medium-scale triaxial apparatus and specimen size of 200mm×500mm to study the effect of geo-grid reinforcement and the relationship between the residual deformation of the reinforced composites and the cyclic number.A modified Shenzhujiang model was adopted to fit the deformation data for the cases of reinforcement and no reinforcement.The results show that the residual volumetric and shear deformations are reduced by the reinforcement,and that the model parameters become smaller.更多还原