Seepage stability analysis of earth and rockfill dam with clay core by considering high permeability zones

doi:10.13243/j.cnki.slxb.20200202

科研成果详情

题名	Seepage stability analysis of earth and rockfill dam with clay core by considering high permeability zones
其他题名	存在高渗透区的黏土心墙土石坝渗流稳定性分析
作者	Peng, Ming 1; Bi, Jingchao 1; Zhu, Yan 1,2; Fang, Kenglong3; Li, Bingxin 4; Xu, Jiacheng 5
发表日期	2020-11-01
发表期刊	Shuili Xuebao/Journal of Hydraulic Engineering 影响因子和分区
语种	中文
原始文献类型	Journal article (JA)
关键词	Dams Failure (mechanical) Pore pressure Pressure distribution Quality control Rock mechanics Seepage Stability Water levels Earth and rock-fill dam High permeability High permeability zone Hydraulic gradients Low permeability Pore-water pressures Seepage stability Water retaining structures
摘要	Rockfill dams with clay core are important water-retaining structures. The low permeability of the core wall can highly reduce the hydraulic gradient of the rest dam body and the risks of seepage failure to the dam body. However, the quality of the core wall (such as local high-permeability zones, ) will affect the seepage stability of the dam body, which may lead to serious consequences such as piping failure. In this paper, large-scale water flume tests of seepage stability is performed with the prototype of the Pubugou soil and rockfill dam. A numerical model of finite element which was validated with the test results was used to study the influence of the high-permeability zone (HPZ) on the seepage field and stability of the model dam. The test shows that the HPZ will change the seepage field of the clay core and become a dominant seepage channel, and meanwhile, the existence of high permeability area will significantly increase the seepage rate of the dam body. The test and simulation results both show that the pore water pressure of the upper part of the clay core increased with the rising of the HPZ position; while the leakage volume of the dam decreased at the same time because of lower water pressure of the HPZ. With the increase of the permeability of the clay core and the HPZ, the pore water pressure of clay core and the leakage rate both increased. The seepage stability of the dam would be reduced with the increase of the permeability of the HPZ and the water level. Although the increase of the permeability of the clay core will leading to decrease of the hydraulic gradient in the HPZ, the increase of the hydraulic gradient in the clay core would lead to decrease of the seepage stability of the clay core. The results obtained in the paper offer basis on the back analysis of the clay wall quality and the assessment of the safety and performance of the dams. © 2020, China Water Power Press. All right reserved.
出版者	International Research and Training Center on Erosion and Sedimentation and China Water and Power Press
ISSN	0559-9350
卷号	51 期号:11 页码:1347-1359
DOI	10.13243/j.cnki.slxb.20200202
页数	22
收录类别	EI ; SCOPUS
EI入藏号	20210309770775
EI主题词	Leakage (fluid)
URL	查看原文
SCOPUSEID	2-s2.0-85099180045
通讯作者地址	[Zhu, Yan]Department of Geotechnical Engineering,Tongji University,Shanghai,200092,China
Scopus学科分类	Water Science and Technology;Energy Engineering and Power Technology;Mechanical Engineering
引用统计
文献类型	期刊论文
条目标识符	https://kms.wmu.edu.cn/handle/3ETUA0LF/34985
专题	附属第一医院_基建处
通讯作者	Zhu, Yan
作者单位	1.Department of Geotechnical Engineering, Tongji University, Shanghai; 200092, China; 2.China Shipbuilding NDRI Engineering Co. Ltd, Shanghai; 200063, China; 3.Capital Construction Department, Wenzhou Medical University, Wenzhou; 325035, China; 4.Zoina Land Limited Company, Shanghai; 200050, China; 5.China International Engineering Consulting Corporation, Beijing; 100048, China
推荐引用方式 GB/T 7714	Peng, Ming,Bi, Jingchao,Zhu, Yan,et al. Seepage stability analysis of earth and rockfill dam with clay core by considering high permeability zones[J]. Shuili Xuebao/Journal of Hydraulic Engineering,2020,51(11):1347-1359.
APA	Peng, Ming, Bi, Jingchao, Zhu, Yan, Fang, Kenglong, Li, Bingxin, & Xu, Jiacheng. (2020). Seepage stability analysis of earth and rockfill dam with clay core by considering high permeability zones. Shuili Xuebao/Journal of Hydraulic Engineering, 51(11), 1347-1359.
MLA	Peng, Ming,et al."Seepage stability analysis of earth and rockfill dam with clay core by considering high permeability zones".Shuili Xuebao/Journal of Hydraulic Engineering 51.11(2020):1347-1359.