Evolution law and model estimation and modification of resilience modulus of coarse grained soil subgrade under wet and dry cycle

被引：0
|
作者：
Ran W.-P. [1 ]
Chen H.-M. [1 ]
Li L. [1 ]
Feng L.-Q. [2 ]
机构：
[1] School of Civil Engineering & Architecture, Xinjiang University, Urumqi
[2] Research Department of Road & Bridge, Research Institute of Xinjiang Transportation Science, Urumqi
来源：
Jilin Daxue Xuebao (Gongxueban)/Journal of Jilin University (Engineering and Technology Edition) | 2021年 / 51卷 / 06期
关键词：
Coarse-grained soil; Correction coefficient; Dry-wet cycle; Modulus estimate; Road engineering;
D O I：
10.13229/j.cnki.jdxbgxb20200614
中图分类号：
学科分类号：
摘要：
With the help of the dynamic triaxial test system, the changes of coarse-grain soil rebound modulus under different moisture content, stress loading paths and dry and wet cycles (N) are studied. A several estimation models are used to determine the Ni model as the estimation model of coarse-grain soil modulus, and the correction coefficient and fitting equation are put forward. The test results show that the rebound modulus decreases with the increase of water content, and the rebound modulus corresponding to 4% water content is the largest. When the partial stress is fixed, the surrounding pressure and the rebound modulus are negatively correlated with the rebound modulus. With the increase of N the rebound modulus has the trend of decay, which reaches the maximum at N=1~2, and the decay is reduced at N=3~4, when N>4, the rebound modulus becomes stable. The research results provide a reference basis for the design of coarse-grain soil subgrade. © 2021, Jilin University Press. All right reserved.
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页码：2079 / 2086
页数：7
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