Shear strength features of soils developed from purple clay rock and containing less than two-millimeter rock fragments
文献类型：期刊论文
| 作者 | ZHONG Shou-qin; ZHONG Mang; WEI Chao-fu; ZHANG Wei-hua; HU Fei-nan |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2016-08 |
| 卷号 | 13期号:8页码:1464-1480 |
| ISSN号 | 1672-6316 |
| 关键词 | Shear strength Purple soils Rock fragments Particle size distribution (PSD) Soil water content Triaxial test |
| 通讯作者 | WEI Chao-fu |
| 英文摘要 | Soil shear strength is an important indicator of engineering design and an essential parameter of soil precision tillage and agricultural machinery and equipment design. Although numerous studies have investigated the characteristics of different soil shear strengths, only a few of these works have paid attention to soils containing considerable quantities of rock fragments. To date, most studies on the effects of rock fragments on the shear strength have paid attention to the role of rock fragments with sizes >2 mm. The effects of rock fragments <2 mm in soil are generally ignored. Similar to rock fragments >2 mm, the presence of rock fragments <2 mmcould also change the mechanical properties of soils. Thus, in the present study we evaluated the potential influence of <2 mm rock fragments on soil shear strength via an unconsolidated undrained (UU) triaxial compression test. Our results were as follows: (1) A certain quantity of <2 mm rock fragmentspresented in purple soils developed from clay rocks; and an appropriate quantity of <2 mm rock fragments could improve the shear strength of soils. (2) The different PSDs of soils containing <2 mm rock fragments mainly caused variations in the internal friction angle of soils. (3) The shear strengths of the two mudstone-developed red-brown and gray-brown purple soils was more sensitive to water than that of the shale-developed coarse-dark purple soil. As the soil water content increased from 9% to 23%, the changes in the cohesion, internal friction angle, shear strength, and the maximum principal stress difference were smaller in the coarse dark purple soil than in the two other soils. We therefore concluded that <2 mm rock fragments in purple soils exerted important effects on soil shear strength. A better understanding of the differences among the shear strength features of purple soils could help improve the design of agricultural machinery and equipment. |
| 收录类别 | SCI |
| 语种 | 英语 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/17447]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2016_Vol13 No.8 |
| 推荐引用方式 GB/T 7714 | ZHONG Shou-qin,ZHONG Mang,WEI Chao-fu,et al. Shear strength features of soils developed from purple clay rock and containing less than two-millimeter rock fragments[J]. Journal of Mountain Science,2016,13(8):1464-1480. |
| APA | ZHONG Shou-qin,ZHONG Mang,WEI Chao-fu,ZHANG Wei-hua,&HU Fei-nan.(2016).Shear strength features of soils developed from purple clay rock and containing less than two-millimeter rock fragments.Journal of Mountain Science,13(8),1464-1480. |
| MLA | ZHONG Shou-qin,et al."Shear strength features of soils developed from purple clay rock and containing less than two-millimeter rock fragments".Journal of Mountain Science 13.8(2016):1464-1480. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
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