【摘要】 摘要:从孔隙水的存在状态出发,探讨了吸力的两种不同作用效果与非饱和形态的关系,从理论上论证了Bishop公式的正确性,澄清了多年来一个基本概念上的误解。用新的观点阐述了非饱和土中抗剪强度分布不均匀及浸水湿陷的原因;同时还对Fredlund和卢肇钧提出的抗剪强度理论及参数的测试方法进行了分析,提出各种抗剪强度理论在概念上都是相同的,其区别仅在于确定由吸力产生的那部分有效应力时采用的参数和测试方法不同。为今后非饱和土的抗剪强度研究从理论转向实用提供了理论基础。更多还原

【Abstract】 Based on the existing state of pore water in soil,the relationship between two different effects of suction pressure and unsaturated form is studied.Bishop’s formula is proved correct theoretically.A misconception existing for years is clarified.The reasons for uneven distribution of shear strength and collapsibility of unsaturated soil are explained from a new viewpoint.The shear strength theory and test method of parameters of Fredlund and Lu Zhao-jun are also discussed.Although all kinds of shear strength theories are identical in concept,the difference consists in the different test methods of effective stress induced by suction pressure.Thus,the theoretical basis is provided for shear strength study transferring from theorization to practicability in the future.更多还原