| 非饱和土的有效应力与抗剪强度 |
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| 引用本文： | 王志玲,张印杰,丰土根.非饱和土的有效应力与抗剪强度[J].岩土力学,2002,23(4):432-436. |
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| 作者姓名： | 王志玲 张印杰 丰土根 |
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| 作者单位： | 1. 河海大学岩土工程研究所,江苏,南京,210024
2. 郑州工业大学土建学院,河南,郑州,450002 |
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| 摘 要： | 从孔隙土的存在状态出发，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，提出了各种抗剪强度理论在理论上都是相同的，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。
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| 关 键 词： | 非饱和土 抗剪强度 有效应力 内部应力 孔隙水 存在状态 |
| 文章编号： | 1000-7598-(2002)04-0432-05 |
| 修稿时间： | 2001年5月28日 |
Effective stress and shear strength of unsaturated soil |
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| WANG Zhi-ling ,ZHANG Yin-jie ,FENG Tu-g en.Effective stress and shear strength of unsaturated soil[J].Rock and Soil Mechanics,2002,23(4):432-436. |
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| Authors: | WANG Zhi-ling ZHANG Yin-jie FENG Tu-g en |
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| Institution: | WANG Zhi-ling 1,ZHANG Yin-jie 2,FENG Tu-g en 1 |
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| 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. |
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| Keywords: | unsaturated soil shear strength effective stress internal stress |
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