水土保持通报2011，Vol.31Issue(3)：81-84,4.
冻融作用对黑土力学性质的影响研究
Effects of Freeze-Thaw Cycle on Mechanical Properties of Black Soil
摘要
Abstract
Repeated freeze—thaw cycles cause changes in soil cohesion and internal friction angle,increasing the erodibility of the soil.This study discussed the variations of soil bulk cohesion and internal friction angle in the freeze-thaw cycles and analyzed the freeze—thaw effects on soil anti-erodibility.The black soil was selected as the study object.The changing trend of cohesion and internal friction angle of the soil were investigated through indoor freeze—thaw experiments with consideration of different freezing cycles and various soil moisture contents.The results show that freeze—thaw cycles affected greatly the soil cohesion and slightly the internal friction angle.With increasing numbers of freeze—thaw cycles,soil cohesion decreased and then achieved a stable state after three freeze—thaw cycles.With the increase of soil moisture,soil cohesion reduced and then increased in individual freeze—thaw cycles.At same freeze—thaw temperature,soil cohesion was affected greatly in the first freeze—thaw cycle,and very little in the following cycles.In contrast to soil cohesion,internal friction angle did not change significantly in the whole process of freeze—thaw cycles.关键词
冻融循环/黏聚力/内摩擦角/黑土Key words
freeze一thaw cycle/cohesion/internal friction angle/black soil分类
农业科技引用本文复制引用
范昊明,钱多,周丽丽,武敏..冻融作用对黑土力学性质的影响研究[J].水土保持通报,2011,31(3):81-84,4.基金项目
国家自然科学基金项目“辽西褐土旱作农田区沟灌侵蚀机理与侵蚀过程研究” （）
国家自然科学青年基金项目“东北旱地耕作土壤冻融作用机理与春季解冻期土壤侵蚀模拟” （）
