The role of roots in the stability of landfill clay covers under the effect of dry-wet cycles
文献类型：期刊论文
| 作者 | Liu, Lei; Wan, Yong; Xue, Qiang ; Zhao, Li-ye
|
| 刊名 | ENVIRONMENTAL EARTH SCIENCES
 |
| 出版日期 | 2016 |
| 卷号 | 75期号:1页码:- |
| 关键词 | Landfill Clay cover Stability Dry-wet cycles Vegetation roots |
| ISSN号 | 1866-6280 |
| DOI | 10.1007/s12665-015-4876-7 |
| 英文摘要 | This study investigates the role of vegetation roots in the stability of landfill clay covers subject to dry-wet cycles. Soil shear strength is tested at different depths of bare and vegetation covers before and after 1 year of seasonal dry-wet cycles. Results show that the effect of these cycles and of vegetation roots on the soil shear strength of covers mainly alters soil cohesion. By contrast, the effect on the internal friction angle of soil is inconspicuous. After 1 year of seasonal dry-wet cycles and grass root growth, the soil cohesion of the vegetation cover increases, whereas that of the bare cover decreases. The increment in the soil cohesions of two covers tends to decline exponentially with increasing cover depth. Thus, the cover stability model is established according to upper-bound solution theory based on the change rule of cover shear strength under the effect of dry-wet cycles and vegetation roots. The theoretical analysis results indicate that the increase in cover slope safety factor that was caused by vegetation roots is significant, compare that of bare cover under dry-wet cycles. Nonetheless, the effect of roots on cover slope safety factor decreases with increasing slope length and cover slope angle. |
| WOS研究方向 | Environmental Sciences & Ecology ; Geology ; Water Resources |
| 语种 | 英语 |
| WOS记录号 | WOS:000370239800071 |
| 出版者 | SPRINGER |
| 源URL | [http://119.78.100.198/handle/2S6PX9GI/3806]  |
| 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, Inst Rock & Soil Mech, State Key Lab Geomech & Geotech Engn, Bayi Rd |
| 推荐引用方式 GB/T 7714 | Liu, Lei,Wan, Yong,Xue, Qiang,et al. The role of roots in the stability of landfill clay covers under the effect of dry-wet cycles[J]. ENVIRONMENTAL EARTH SCIENCES,2016,75(1):-. |
| APA | Liu, Lei,Wan, Yong,Xue, Qiang,&Zhao, Li-ye.(2016).The role of roots in the stability of landfill clay covers under the effect of dry-wet cycles.ENVIRONMENTAL EARTH SCIENCES,75(1),-. |
| MLA | Liu, Lei,et al."The role of roots in the stability of landfill clay covers under the effect of dry-wet cycles".ENVIRONMENTAL EARTH SCIENCES 75.1(2016):-. |
入库方式： OAI收割
来源：武汉岩土力学研究所
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