Sciences in Cold and Arid Regions ›› 2017, Vol. 9 ›› Issue (3): 289-296.doi: 10.3724/SP.J.1226.2017.00289

• ARTICLES • Previous Articles    

Experimental study of the dynamic behavior of high-grade highway-subgrade soil in a seasonally frozen area

HongHuan Cui1, YuTao Ma1, JianKun Liu2, ZhiYang Wang1   

  1. 1. School of Civil Engineering, Hebei University of Architecture, Zhangjiakou, Hebei 075000, China;
    2. School of Civil Engineering, Beijing Jiaotong University, Beijing 100044, China
  • Received:2016-11-15 Revised:2016-12-15 Published:2018-11-23
  • Contact: Cui HongHuan, HongHuan Cui, Professor, Hebei University of Architecture. No.13, Chaoyang West Street, Zhangjiakou, Hebei 075000, China. Tel: +86-13833370501; E-mail:
  • Supported by:
    The authors are grateful to the anonymous reviewers for their critical reviews and comments on drafts of this manuscript.This research was funded by the National Natural Science Foundation of China (No. 51378057).

Abstract: Regarding the freezing damage of high-grade highway subgrade in seasonally frozen area, the thesis explores the effect on the dynamic behavior of subgrade soil under freeze-thaw cycles and draws the change law of parameters (including dynamic strength, dynamic cohesion, and internal friction angle; and dynamic elastic modulus) of high-grade highway-subgrade soil with the number of freeze-thaw cycles. It aims to provide the reference for operation and maintenance of a high-grade highway. Conclusions: (1) Dynamic strength tends to decline evidently after freeze-thaw cycles, with 60%~70% decline after three cycles, and remains stable after five to seven cycles. (2) With the number of freeze-thaw cycles increasing, the internal friction angle fluctuates within a certain range without an obvious change law, only presenting the tendency of dropping off. The dynamic cohesion declines obviously, about 20%~40% after seven freeze-thaw cycles, and then tends to be stable. (3) With the number of freeze-thaw cycles increasing, the dynamic elastic modulus and maximum dynamic elastic modulus are inclined to decrease distinctly. After five freeze-thaw cycles, the former declines 30%~40% and then remains stable. Meanwhile, the latter falls 20%~40%.

Key words: seasonally frozen area, freeze-thaw cycle, dynamic behavior, dynamic triaxial test, high-grade highway-subgrade soil

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