摘要
由于孔隙气和收缩膜的存在,非饱和土的应力应变关系、抗剪强度等各方面比饱和土复杂,导致其抗剪强度理论的研究进展相对缓慢。在参阅中外文相关资料的基础上,对目前比较有代表性的非饱和土抗剪强度公式:Bishop公式、Fredlund公式、非线性抗剪强度公式、与土-水特征曲线有关的抗剪强度公式等进行了讨论,结合以往学者所作的关于应力状态以及土体类型对非饱和土抗剪强度的影响研究,指出土-水特征曲线(SWCC)是这些影响因素的一个联通点,也是今后非饱和土体强度理论研究的重点。
Because of the complexity caused by the air phase and the contractile membrane, the stress - strain relation and shear strength of unsaturated soil are more complicated than those of the saturated soil, and the shear strength theory of unsaturat- ed soil develops slowly. Based on literature - analysis, we review the representative shear strength formulas of unsaturated soil, including Bishop formula, Fredlund formula, nonlinear shear strength formulas and the formulas relating to the soil -water char- acteristic curve. It is pointed out that the soil -water characteristic curve （SWCC） is a link that combines the influence of stress state and soil type on the shear strength, which should be the emphasis in the future work about the shear strength of unsaturated soil.
出处
《人民长江》
北大核心
2011年第23期76-79,97,共5页
Yangtze River
基金
国家自然科学基金"滑坡土体非饱和蠕变特性研究("50879044)
关键词
非饱和土
抗剪强度
吸力
土-水特征曲线
应力状态
unsaturated soil
shear strength
suction
soil - water characteristic curve
stress state
