中南大学学报（自然科学版）2012，Vol.43Issue(12)：4834-4839,6.
粉土动态回弹模量试验研究
Dynamic resilient modulus of silt
摘要
Abstract
For the sake of investigating the factors which affect the silt dynamic resilient modulus and their laws, a series resilient modulus tests were carried out by conducting dynamic-triaxial test. The relationships between deviation stress, confining stress, bulk stress and dynamic resilient modulus were analyzed. Considering that dynamic resilient modulus is a function of deviation stress and bulk stress, with a brief introduction of the present resilient modulus constitutive prediction models, the dynamic resilient modulus constitutive model which reflects the effect of bulk stress and deviator stress was utilized for experimental data regression analysis. The results demonstrate that dynamic resilient modulus rise with the increase of confining stress and compaction degree, in reverse of circular deviator stress and moisture content. A high relativity between the predictive results and the experimental value shows that the model which reflects the effect of bulk stress and deviator stress is accurate and credible. A high coefficient of determination shows that the model which reflects the effect of bulk stress and deviator stress is accurate and credible. The prediction models for different compaction degrees, and moisture content were achieved, and they can provide parameters for the pavement design based on dynamic method.关键词
粉土/动回弹模量/动三轴试验/应力依赖/回归分析/预估模型Key words
silt/ dynamic resilient modulus/ dynamic-triaxial test/ stress-dependent/ regression analysis/ prediction model分类
建筑与水利引用本文复制引用
董城,冷伍明,李志勇..粉土动态回弹模量试验研究[J].中南大学学报（自然科学版）,2012,43(12):4834-4839,6.基金项目
交通部西部交通建设科技资助项目(2011318785760,2009318785104) （2011318785760,2009318785104）
湖南省交通科技项目(200915) （200915）
