Abstract
Inner Mongolia is characterized by a vast area, large east-west span, complex and variable climate environment, numerous types of road engineering landforms, and subgrade soil includes sandy soil and yellow soil, with significant differences in engineering properties. To study the dynamic resilience modulus of typical subgrade soil in Inner Mongolia, this paper selected five soil samples from different regions, and adopted the repeated loading dynamic triaxial test method under the determined stress range of the subgrade. Meanwhile, the GDS dynamic triaxial apparatus was employed to test the dynamic resilience modulus of soil samples from different regions in different stress conditions at their respective optimal water content. The dynamic resilience modulus of soil samples from different regions at different water contents was tested with the same stress conditions maintained. Finally, the dynamic resilience modulus changes of soil samples from various regions after freeze-thaw cycles were tested, and the freeze-thaw cycle reduction factor for selecting soil sample regions was recommended. The results show that the dynamic resilience modulus of subgrade soil in Inner Mongolia increases continuously with the rising confining pressure and decreases continuously with the increasing deviatoric stress at the optimal water content. Additionally, the influence of confining pressure on the dynamic resilience modulus is significantly higher than that of deviatoric stress. In constant stress conditions, the dynamic resilience modulus of subgrade soil decreases with the rising water content. The higher content of fine particles in the soil samples leads to greater influence of water content changes on its resilience modulus. The resilience modulus of subgrade soil decreases continuously with the growing freeze-thaw cycles, and it takes six to nine cycles for the resilience modulus of subgrade soil to stabilize with the rising fine particle content.
Publication Date
8-18-2022
DOI
10.14048/j.issn.1671-2579.2022.04.003
First Page
13
Last Page
20
Submission Date
May 2025
Recommended Citation
Yiluo, ZHANG; Ning, LI; Zhanwei, DENG; Xuechao, DONG; and Yinglun, CHENG
(2022)
"Research on Dynamic Resilience Modulus of Typical Subgrade Soil in Inner Mongolia,"
Journal of China & Foreign Highway: Vol. 42:
Iss.
4, Article 3.
DOI: 10.14048/j.issn.1671-2579.2022.04.003
Available at:
https://zwgl1980.csust.edu.cn/journal/vol42/iss4/3
Reference
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