铁道科学与工程学报2016，Vol.13Issue(4)：669-674,6.
冻融循环作用对黄土力学性质损伤的试验研究
Experimental study on mechanics properties damage to the loess under the freeze-thaw cycle
摘要
Abstract
Based on freeze-thaw cycle test,the low temperature rebound test and the tri-axial shear test were conducted on Shaanxi Yangling Q3 loess under the replenishment conditions.Besides,the process and the mech-anism of effects on mechanical properties of loess by initial water content and difference low temperature and freeze-thaw cycle was revealed,and the damage model of strength parameters is established under the effect of freeze-thaw cycle.The research shows that strength parameters of loess show signs of deterioration with the freeze-thaw cycle.The cohesion of loess has significant degradation effect at the beginning of the freeze-thaw cycle,and cohesive force reached a steady value after 5 ~7 times freeze-thaw cycle.Besides,cohesion of de-cline is not obvious when the moisture content is very high,and the change of angle of internal friction is not ob-vious with the freeze-thaw cycle.The values of strength parameter of the damage model can be well reflected by the increase of the number of freeze-thaw cycles and the shear strength of shear strength of loess under the ac-tion of freezing and thawing cycles,which can provide data for engineering design and construction in loess area from freeze-thaw damage.关键词
黄土/力学性质/冻融循环/损伤模型Key words
loess/mechanical properties/freeze-thaw cycle/damage model分类
建筑与水利引用本文复制引用
庞旭卿,胡再强,刘寅..冻融循环作用对黄土力学性质损伤的试验研究[J].铁道科学与工程学报,2016,13(4):669-674,6.基金项目
国家自然科学基金资助项目(50778152) （50778152）
陕西省渭南市科研发展计划项目(2015KYJ-3-2) （2015KYJ-3-2）
陕铁院科研基金资助项目(2015-09) （2015-09）
