| 基于广义吸力的非饱和土强度理论 |
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| 引用本文： | 程钰,马士杰. 基于广义吸力的非饱和土强度理论[J]. 公路交通科技, 2011, 28(8): 46-51. DOI: 10.3969/j.isan.1002-0268.2011.08.009 |
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| 作者姓名： | 程钰 马士杰 |
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| 作者单位： | 1. 高速公路养护技术交通行业重点实验室,山东济南,250031
2. 山东省道路结构与材料重点实验室,山东济南,250031 |
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| 摘 要： | 基于非饱和土的剪切强度是由于可变吸力和表现凝聚力折减之后构成,其可变吸力对强度的贡献不仅取决于吸力的大小,还取决于土粒接触点处孔隙水面积,是粒间作用力和作用面积动态变化的结果.分析结果表明:表现凝聚力对强度的贡献与饱和度的变化路径相关,随着饱和度的增加,表现凝聚力对强度的贡献逐渐减小,当土体达到饱和时,表现凝聚力对土体...
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| 关 键 词： | 道路工程 广义吸力 剪切强度 非饱和土 Mohr - Coulomb破坏包线 |
Strength Theory of Unsaturated Soil Based on Generalized Suction |
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| CHENG Yu,MA Shijie. Strength Theory of Unsaturated Soil Based on Generalized Suction[J]. Journal of Highway and Transportation Research and Development, 2011, 28(8): 46-51. DOI: 10.3969/j.isan.1002-0268.2011.08.009 |
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| Authors: | CHENG Yu MA Shijie |
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| Affiliation: | CHENG Yu1,MA Shijie2(1.Key Laboratory of Expressway Maintenance Technology of Ministry of Transport,Jinan Shandong 250031,China,2.Key Laboratory for Road structure and Materials of Shandong Province,China) |
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| Abstract: | Shear strength of unsaturated soil is made up of reduction of variable suction and apparent cohesion.The contribution of variable suction to the shear strength depends not only on the size of suction,but also on the pore water area of the contact point,which is dynamic action of particle force and the pore water area.The analysis result shows that(1) The contribution of apparent cohesion to shear strength varies with the change of saturation.As the saturation increases,the contribution of apparent cohesion ... |
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| Keywords: | road engineering generalized suction shear strength unsaturated soil Mohr-Coulomb failure envelope |
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