岩土力学2012，Vol.33Issue(3)：665-673,9.
两种粉质黏土的动、静强度特性对比研究
Comparisons of static and dynamic behaviors between two silty clays by test
摘要
Abstract
Basic properties and microstructures of two typical silty clays collected along Beijing-Tianjin high-speed railway and Hangzhou metro line are studied. Using triaxial testing apparatus by GDS Company, static tests under consolidated undrained condition and dynamic tests under high cycles for simulating long-term traffic loading are carried out on these two soils. The undrained static strength, dynamic strength, critical dynamic stress ratio, development of accumulated dynamic strain, and shear strength after vibration of both soils have been studied for comparison. It is found that the soil along the Hangzhou metro line is with high water content, low density, large void ratio, which leads to weak strength and high sensitivity compared with those of Beijing-Tianjin's. After small amplitude cyclic loading, both of the undisturbed specimens behave higher shear strength than that under static condition, while after large amplitude cyclic loading, vice versa. The remolded specimens always show a strength reduction after cyclic loading, no matter the amplitude of dynamic loading.关键词
交通荷载/动三轴试验/扫描电镜/残余应变/振后抗剪强度Key words
traffic loading/ dynamic triaxial test/ scanning electron microscope/ residual strain/ shear strength after dynamic loading分类
建筑与水利引用本文复制引用
黄博,史海栋,凌道盛,陈云敏..两种粉质黏土的动、静强度特性对比研究[J].岩土力学,2012,33(3):665-673,9.基金项目
地震行业科研专项(No.200808022) （No.200808022）
国家自然科学基金资助项目(No.50708095) （No.50708095）
国家重点基础研究发展计划(No.2007CB714200) （No.2007CB714200）
国家海洋局第二海洋研究所科研业务费专项基金(JT0803)联合资助. （JT0803）
