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Experimental Study On Critical Dynamic Stress Of Coarse-Grained Soil In Railway Subgrade
Experimental Study On Critical Dynamic Stress Of Coarse-Grained Soil In Railway Subgrade
Rock and Soil Mechanics
The coarse-grained soil is widely used as the filling in the railway subgrade, which is directly subjected to the long-term effect of the dynamic cyclic train loads transmitted from the track structure. Investigation of its dynamic behavior and plastic deformation characteristics under the dynamic train loads may provide ideas for the subgrade performance evaluation and settlement control. GDS dynamic triaxial tests were used to investigate the dynamic response of coarse-grained soil in railway subgrade. By introducing the plastic strain rate and shakedown theory, the evolution law of axial plastic strain of subgrade under different frequencies, confining pressures and cyclic dynamic …
Analysis Of The Nonlinearity Of Coefficient Of Earth Pressure At Rest And Its Calculation Method For Coarse-Grained Soils, Zhao-Sheng Yu, Xiao-Bin Chen, Jia-Sheng Zhang, Liang Dong, M S Abdoulkader
Analysis Of The Nonlinearity Of Coefficient Of Earth Pressure At Rest And Its Calculation Method For Coarse-Grained Soils, Zhao-Sheng Yu, Xiao-Bin Chen, Jia-Sheng Zhang, Liang Dong, M S Abdoulkader
Rock and Soil Mechanics
The acquisition of a precise coefficient of earth pressure at rest (K0) is very important for earth pressure calculation, and the study of nonlinear characteristics of K0 has great practical significance. Nevertheless, the research on nonlinearity of K0 for coarse-grained soils has long been neglected. To fill the gap, this study presents a detailed analysis of the nonlinearity characteristics of K0 for coarse-grained soils. Based on the incremental stress-strain relation of Duncan-Chang model, we establish the mathematical formula of K0, and the sensitivity analysis of the K0 formula is presented. The proposed method is applied to predict the K0 of …