Hydraulic and Mechanical Behavior of Unsaturated Silt: Experimental and Theoretical Characterization
文献类型：期刊论文
| 作者 | Li, Wentao; Wei, Changfu; Ma, Tiantian; Wei, Houzhen |
| 刊名 | INTERNATIONAL JOURNAL OF GEOMECHANICS
 |
| 出版日期 | 2016 |
| 卷号 | 16期号:6页码:- |
| 关键词 | Unsaturated soil Compacted silt Dilatancy Soil-water characteristic curve Triaxial test Elastoplastic constitutive model |
| ISSN号 | 1532-3641 |
| DOI | 10.1061/(ASCE)GM.1943-5622.0000576 |
| 英文摘要 | A series of experiments were performed to investigate the hydraulic and mechanical behavior of an unsaturated silt obtained from the Yellow River Delta. To identify the key factors that influence the soil-water characteristics (SWC), an experimental program was designed to study the SWC of the soil at different void ratios and vertical pressures. It was shown that an that that apparent hysteresis phenomenon occurred on the SWC curves when the soil experienced drying/wetting cycles. It was also shown that the influence of void ratio on the SWC was significant, and the stress state influenced the SWC only through changing the void ratio. Isotropic compression tests were conducted at different constant matric suctions, using a suction-controlled double cell triaxial apparatus. The soil under shearing showed apparent dilatant and softening behavior, in a way similar to medium to dense sand. In addition, the hardening effect of matric suction was significant, and both the stiffness and peak strength of the soil increased with matric suction. Based on the experimental observations, an elastoplastic constitutive model coupling capillary hysteresis and plastic deformation was developed, in which a hysteretic SWC relationship was introduced to characterize the influence of hydraulic history on the skeletal deformation. To better simulate the volumetric change of the soil, a nonassociated flow rule was adopted. The effect of the plastic volumetric strain on water-retention behavior was also taken into consideration. The proposed model was used to simulate the behavior of unsaturated silt under constant-suction, isotropic compression and constant-suction, triaxial shearing conditions, showing the capability of the new model in describing the behavior of unsaturated silt. (C) 2015 American Society of Civil Engineers. |
| WOS研究方向 | Engineering |
| 语种 | 英语 |
| WOS记录号 | WOS:000388599600004 |
| 出版者 | ASCE-AMER SOC CIVIL ENGINEERS |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3958]  |
| 专题 | 岩土力学所知识全产出_期刊论文 国家重点实验室知识产出_期刊论文 |
| 作者单位 | Chinese Acad Sci, State Key Lab Geomech & Geotech Engn, Inst Rock & Soil Mech |
| 推荐引用方式 GB/T 7714 | Li, Wentao,Wei, Changfu,Ma, Tiantian,et al. Hydraulic and Mechanical Behavior of Unsaturated Silt: Experimental and Theoretical Characterization[J]. INTERNATIONAL JOURNAL OF GEOMECHANICS,2016,16(6):-. |
| APA | Li, Wentao,Wei, Changfu,Ma, Tiantian,&Wei, Houzhen.(2016).Hydraulic and Mechanical Behavior of Unsaturated Silt: Experimental and Theoretical Characterization.INTERNATIONAL JOURNAL OF GEOMECHANICS,16(6),-. |
| MLA | Li, Wentao,et al."Hydraulic and Mechanical Behavior of Unsaturated Silt: Experimental and Theoretical Characterization".INTERNATIONAL JOURNAL OF GEOMECHANICS 16.6(2016):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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