摘要
为了研究加筋红砂岩土石混合料的力学特性,以双绞合六边形钢丝网为筋材,采用三轴不固结不排水剪切试验,研究了双绞合六边形钢丝网加筋红砂岩的应力应变关系以及随加筋层数、含水量、围压的变化规律,确定各种条件下泥质红砂岩填料体的强度参数c、φ值。试验结果表明,双绞合六边形钢丝网加筋红砂岩的抗剪强度随加筋层数的增加和加筋间距的减小而增加,抗剪强度的提高表现为c值的提高。在此基础上,建立了基于指数函数模型的加筋土弹性非线性本构方程式,指出了4个材料参数均可看作为加筋层数和含水量的函数。
With reinforced material of double-twisted hexagonal steel wire mesh,the unconsolidated-undrained and consolidated-undrained triaxial shear tests are conducted to analyze stress and strain relationship of reinforced the argillaceous red sandstone,variations of reinforced benefit coefficient IR with reinforced layers,water content and the variational rule of confining pressure to determine the strength parameters c,φ for the argillaceous red sandstone under various conditions.The results show that： sheer strength of reinforced the argillaceous red sandstone increases as the increase of number of reinforcement material and the decrease of the vertical layout reinforcement＇s interval value.Increase of sheer strength is manifested by the increase of.An elastic and nonlinearconstitutive equations of the reinforced earth has been constituted based on the model of exponent and function,and four material parameters have been put forward to be considered as the the function of the reinforced layers and water content.
出处
《公路工程》
2010年第5期10-16,共7页
Highway Engineering
基金
湖南省交通科技项目(200612)
关键词
双绞合六边形钢丝网
加筋土
红层软岩土石混合料
大型三轴剪切试验
试验研究
double-twisted hexagonal steel wire mesh
reinforced earth
argillaceous red sandstone
large-scale triaxial shear test
experimental study
