摘要
结构吸力也是随含水状态及饱和度的改变而变化 ,由此提出了可变结构吸力和本征结构吸力的概念 ,指出在研究有效应力时 ,要研究的是随饱和状态而变化的可变结构吸力 .基于 Щукин的土结构强度理论 ,分析了可变结构吸力计算方法和测试方法 .研究表明 ,可变结构吸力除受饱和状态的影响外 ,还受土颗粒几何结构的影响 .基于可变结构吸力和湿吸力 。
We hold that the structure suction are changeable along with the change of the saturation state in unsaturated soils. In view of this, the concept of intrinsic structure suction and variable structure suction are given and expounded, and this paper points out:What we should study is variable structure suction when studying the effective stress Based on Щукнн′s theory of structure strength of soils, the computing method for variable structure suction is analyzed, the method for measuring variable structure suction is discussed, and the following conclusions are reached:①Besides saturation state, variable structure suction is affected also by grain composition and packing patter of grains;② The internal relations are present between structure parameter N in computing structure suction and structure parameter D in computing absorbed suction Based on the variable structure suction and absorbed suction, the general effective stress formula and a principle of general effective stress are proposed for unsaturated soils.
出处
《中山大学学报（自然科学版）》
CAS
CSCD
北大核心
2000年第6期95-100,共6页
Acta Scientiarum Naturalium Universitatis Sunyatseni
基金
国家自然科学基金资助项目!( 597790 19
5980 90 0 8)
广东省自然科学基金资助项目!( 970 12 7)
关键词
本征结构吸力
可变结构吸力
非饱和土
有效应力
intrinsic structure suction
variable structure suction
absorbed suction
unsaturated soil
effective stress
