Dynamic Characteristics of Sliding-Zone Soil of Accumulation Landslide Based on Resonant Column Test
In order to study the dynamic characteristic of sliding-zone soil of accumulation landslide,the resonant column test on sliding-zone soil with different shear strains,water contents and confining pressures was carried out to study the variation of dynamic shear modulus and damping ratio with dynamic shear strain.and then the dynamic characteristic parameters of sliding-zone soil were fit by using the Hardin-Drnevich model,and the maximum dynamic shear modulus,dynamic shear modulus ratio,damping ratio test curves and dynamic constitutive model fitting parameters were obtained.The results show that the water content and the confining pressure have a large influence on the maximum dynamic shear modulus of sliding-zone soil,and the maximum dynamic shear modulus increases with the increase of the confining pressure under the same water content condition.The maximum dynamic shear modulus decreases with the increase of water content under the condition of low confining pressure,and the relationship between dynamic shear modulus and dynamic shear strain shows approximately linear at different water content.When the confining pressure is high,the decrease rate of dynamic modulus is obviously accelerated with the increasing of the dynamic shear strain,and the linear relationship between dynamic shear modulus and dynamic shear strain is weekend.Through test,the attenuation curve between dynamic modulus and damping ratio of sliding-zone soil under the condition of different water content and confining pressure were obtained.Based on the test data,and the parameters of Hardin-Drnevich model were fitted by regression.Compared with the general clay curve suggested by Yuan Xiaoming,the results show that the dynamic shear modulus ratio of sliding-zone soil is lower than the average value of general clay soil,and most of the damping ratios are located in the average value of general clay soils.The test results can provide reference for the dynamic stability analysis and landslide control of this type of landslide.
the sliding-zone soil of accumulation landslidemoisture contentconfining pressuredynamic shear modulusdamping ratioresonance column test
万方数据
维普
