Evolution Rule and Prediction Model for Dynamic Resilient Modulus  of Clay under Cyclic Freezing-Thawing

WEI Mi; LI Xue-qin; YU Cheng-xi

doi:10.11988/ckyyb.202106912022

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Journal of Changjiang River Scientific Research Institute ›› 2022, Vol. 39 ›› Issue (11) : 102-106. DOI: 10.11988/ckyyb.202106912022

ROCKSOIL ENGINEERING

Evolution Rule and Prediction Model for Dynamic Resilient Modulus of Clay under Cyclic Freezing-Thawing

WEI Mi¹, LI Xue-qin², YU Cheng-xi²

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Abstract

Dynamic triaxial tests under different deviatoric stresses and confining pressures were carried out to investigate the variations of dynamic resilient modulus of subgrade clay of varied initial moisture content and compaction degree under different freeze-thaw cycles.Results demonstrate that the dynamic resilient modulus of subgrade clay declines with the rising of initial moisture content and deviator stress,but is positively correlated with the degree of compaction and confining pressure.In the mean time,dynamic resilient modulus attenuates under freeze-thaw action,but remains stable after five freeze-thaw cycles.Furthermore,an effective regression model for predicting the dynamic resilient modulus of subgrade clay was established in consideration of the influence of freeze-thaw cycles,physical state and stress conditions.

Key words

clay / freeze-thaw cycles / dynamic resilient modulus / evolution rule / influencing factors / prediction model

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WEI Mi, LI Xue-qin, YU Cheng-xi. Evolution Rule and Prediction Model for Dynamic Resilient Modulus of Clay under Cyclic Freezing-Thawing[J]. Journal of Changjiang River Scientific Research Institute. 2022, 39(11): 102-106 https://doi.org/10.11988/ckyyb.202106912022

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