Permeability and Sedimentation Characteristics of Pleistocene Fluvio-glacial Deposits in the Dadu River Valley, Southwest China
文献类型：期刊论文
| 作者 | TU Guo-xiang ; HUANG Run-qiu ; DENG Hui ; LI Yan-rong |
| 刊名 | Journal of Mountain Science
 |
| 出版日期 | 2013-06 |
| 卷号 | 10期号:3页码:482-493 |
| 关键词 | Fluvio-glacial deposits Grain size distribution Linear and non-linear permeability Seepage failure |
| 通讯作者 | HUANG Run-qiu |
| 英文摘要 | There exist many fluvio-glacial deposits in the valley of Dadu River, Southwest China, which dates back to the Pleistocene. As some of the deposits are located within the seasonal water fluctuation zone of reservoirs, the seepage of groundwater acts as one of the key factors influencing their stability. Investigation into the sediment properties and permeability is, therefore, crucial for evaluating the sediment stability. In this study, in-situ permeability and sieving tests have been carried out to determine grain size distribution, correlations of permeability and hydraulic gradients, and relations between permeability and sedimentation properties. Test results indicate that the deposits are composed mostly of sands, gravels, cobbles and boulders, and the percentage of fines is less than 5%. The sediments have high densities, low porosities and natural moisture contents. At low hydraulic gradients, the seepage velocity obeys the Darcy’s law, while a non-Darcy permeability is observed with hydraulic gradient exceeding a certain value (about 0.5 - 0.7). The linear permeability coefficient ranges from 0.003 to 0.009 cm/s. Seepage failure occurs above a threshold between 1.1 and 1.5. The test data fit well with the non-linear permeability equations suggested by Forchheimer and Izbash. The non-Darcy permeability proves to be in accordance with the seepage equation suggested by Izbash with the power 'm' of about 0.6 - 0.7. The characteristic grain sizes of the studied deposits are found in a narrow range between 0.024 and 0.031 mm, which is much lower than the effective grain size (d10). |
| 收录类别 | SCI |
| 公开日期 | 2013-06-14 |
| 源URL | [http://ir.imde.ac.cn/handle/131551/5401]  |
| 专题 | 成都山地灾害与环境研究所_Journal of Mountain Science _Journal of Mountain Science-2013_Vol10 No.3 |
| 推荐引用方式 GB/T 7714 | TU Guo-xiang,HUANG Run-qiu,DENG Hui,et al. Permeability and Sedimentation Characteristics of Pleistocene Fluvio-glacial Deposits in the Dadu River Valley, Southwest China[J]. Journal of Mountain Science,2013,10(3):482-493. |
| APA | TU Guo-xiang,HUANG Run-qiu,DENG Hui,&LI Yan-rong.(2013).Permeability and Sedimentation Characteristics of Pleistocene Fluvio-glacial Deposits in the Dadu River Valley, Southwest China.Journal of Mountain Science,10(3),482-493. |
| MLA | TU Guo-xiang,et al."Permeability and Sedimentation Characteristics of Pleistocene Fluvio-glacial Deposits in the Dadu River Valley, Southwest China".Journal of Mountain Science 10.3(2013):482-493. |
入库方式： OAI收割
来源：成都山地灾害与环境研究所
浏览0
下载0
收藏0
其他版本
除非特别说明，本系统中所有内容都受版权保护，并保留所有权利。