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Dynamic Behaviors of Overconsolidated Remolded Red Clay Under Cyclic Compressive Stress Paths
This paper presents a series of cyclically loading dynamic triaxial tests for remolded red clay with different overconsolidation ratios, confining pressures and dynamic stress amplitudes having been carried out using the GDS vibratory triaxial apparatus. Main target is the filling of red clay in the high-filling subgrade of CNPC Yunnan Petrochemical Railway special line. Results showed that the critical dynamic stress of overconsolidated remolded red clay increases linearly with the increase in overconsolidation ratio and confining pressure under the cyclic pure pressure dynamics, and an empirical formula for the critical dynamic stress of the region is obtained by regression analysis. Influence of overconsolidation ratio, confining pressure and vibration times on the development of cumulative dynamic strain was analyzed. Moreover, the dynamic strength of overconsolidated remolded red clay is proportional to the overconsolidation ratio and confining pressure. Number of cyclical vibrations has little effect on the dynamic internal friction angle of overconsolidated red clay but has a greater impact on the dynamic cohesion. These test results can provide certain practical value for the overconsolidation of red clay as a subgrade filling project in the area.
Dynamic Behaviors of Overconsolidated Remolded Red Clay Under Cyclic Compressive Stress Paths
This paper presents a series of cyclically loading dynamic triaxial tests for remolded red clay with different overconsolidation ratios, confining pressures and dynamic stress amplitudes having been carried out using the GDS vibratory triaxial apparatus. Main target is the filling of red clay in the high-filling subgrade of CNPC Yunnan Petrochemical Railway special line. Results showed that the critical dynamic stress of overconsolidated remolded red clay increases linearly with the increase in overconsolidation ratio and confining pressure under the cyclic pure pressure dynamics, and an empirical formula for the critical dynamic stress of the region is obtained by regression analysis. Influence of overconsolidation ratio, confining pressure and vibration times on the development of cumulative dynamic strain was analyzed. Moreover, the dynamic strength of overconsolidated remolded red clay is proportional to the overconsolidation ratio and confining pressure. Number of cyclical vibrations has little effect on the dynamic internal friction angle of overconsolidated red clay but has a greater impact on the dynamic cohesion. These test results can provide certain practical value for the overconsolidation of red clay as a subgrade filling project in the area.
Dynamic Behaviors of Overconsolidated Remolded Red Clay Under Cyclic Compressive Stress Paths
Lecture Notes in Civil Engineering
Tutumluer, Erol (editor) / Chen, Xiaobin (editor) / Xiao, Yuanjie (editor) / Yang, Guoyue (author) / Li, Keyu (author) / Xu, Yunlong (author) / Li, Liangji (author)
Advances in Environmental Vibration and Transportation Geodynamics ; Chapter: 18 ; 297-309
2020-04-08
13 pages
Article/Chapter (Book)
Electronic Resource
English
Mechanical properties of saturated remolded loess under different stress paths
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