Failure models of a loess stacked dam: a case study in the Ansai Area (China)
文献类型：期刊论文
| 作者 | Xu, Jiangbo1,3; Wei, Wei1; Bao, Han1; Zhang, Keke1; Lan, Hengxing2 ; Yan, Changgen1; Sun, Weifeng1
|
| 刊名 | BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT
 |
| 出版日期 | 2020-03-01 |
| 卷号 | 79期号:2页码:1009-1021 |
| 关键词 | Stacked dam Infiltration Progressive failure |
| ISSN号 | 1435-9529 |
| DOI | 10.1007/s10064-019-01605-z |
| 通讯作者 | Xu, Jiangbo(xujiangbo@yeah.net) |
| 英文摘要 | A loess dam is not fully compacted, so there may be a high permeability area in a loess dam. The seepage channel appears inside the dam body, and osmosis damage occurs; these events cause the dam body to be unstable and destroyed. In this paper, the loess dam in the Ansai Area, Yan'an, Shaanxi Province, China, is used as an example monitoring target, and the whole life cycle of the dam is monitored by measuring cracks, liquid level and pore pressure. The timeline regarding multiple instances of damage during the period is used as the basis for subdividing the whole life cycle, and dam damage types are distinguished according to the internal factors and external conditions. By analysing the on-site monitoring data, the dam experienced three obvious types of damage from the onset of monitoring until the dam broke. The triggering factors of the three damage types differ. One factor type is the difference in liquid levels on the two sides of the dam and the seepage channel that is then formed inside the dam. The fine-grained soil in the dam is removed from the seepage channel under the action of hydrodynamic force, the soil at the foot of the dam slope tends to be saturated under the action of osmotic water and the shear strength of the dam slope is reduced. When the soil weight of the upper soil is greater than the shear strength of the soil at the foot of the dam, the first damage type occurs; therefore, it is called "internal erosion damage". The second type of damage is attributed to the softening of the dam feet under immersion by rainwater, resulting in the dam collapse; it is called "slumping damage". The third type of damage is due to the infiltration of rainwater through a crack at the top of the dam. The soil at the top of the dam slides along the rainwater intrusion surface, and the width of the dam top is continuously decreased until it completely disappears; therefore, it is called "slippery damage". On that basis, the loess dam failure modes are proposed due to the difference in hydrodynamic forces on the two sides of the dam and formation of a seepage channel. The fine-grained soil is removed from the seepage channel under the action of hydrodynamic force. The seepage channel is continuously expanded, the soil at the foot of the dam is saturated under the action of seepage water, the soil shear strength is reduced, the dam body becomes unstable and the width of the dam crest is decreased. Under the joint action of infiltration and rainfall, the dam begins the next round of infiltration and erosion and the width of the dam roof continues to decrease. The cycle continues as the width of the dam roof is continuously reduced until overtopping occurs. |
| WOS关键词 | EARTH DAM ; INTERNAL EROSION ; TRANSPORT ; STABILITY |
| 资助项目 | National Natural Science Foundation of China[41790443] ; National Natural Science Foundation of China[41807245] ; National Key R&D Program of China[2016YFC0802203] ; Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering[15-KF-05] ; Zhejiang Collaborative Innovation Center for Prevention and Control of Mountain Geologic Hazards[PCMGH-2017-Z-01] ; Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral[DMSM2018067] |
| WOS研究方向 | Engineering ; Geology |
| 语种 | 英语 |
| WOS记录号 | WOS:000526054700029 |
| 出版者 | SPRINGER HEIDELBERG |
| 资助机构 | National Natural Science Foundation of China ; National Key R&D Program of China ; Guangxi Key Laboratory of Geomechanics and Geotechnical Engineering ; Zhejiang Collaborative Innovation Center for Prevention and Control of Mountain Geologic Hazards ; Shandong Provincial Key Laboratory of Depositional Mineralization & Sedimentary Mineral |
| 源URL | [http://ir.igsnrr.ac.cn/handle/311030/134033]  |
| 专题 | 中国科学院地理科学与资源研究所 |
| 通讯作者 | Xu, Jiangbo |
| 作者单位 | 1.Changan Univ, Sch Highway, Xian 710064, Peoples R China 2.Chinese Acad Sci, Inst Geog Sci & Nat Resources Res, Beijing 100101, Peoples R China 3.Shandong Univ Sci & Technol, Shandong Prov Key Lab Deposit Mineralizat & Sedim, Qingdao 266000, Peoples R China |
| 推荐引用方式 GB/T 7714 | Xu, Jiangbo,Wei, Wei,Bao, Han,et al. Failure models of a loess stacked dam: a case study in the Ansai Area (China)[J]. BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,2020,79(2):1009-1021. |
| APA | Xu, Jiangbo.,Wei, Wei.,Bao, Han.,Zhang, Keke.,Lan, Hengxing.,...&Sun, Weifeng.(2020).Failure models of a loess stacked dam: a case study in the Ansai Area (China).BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT,79(2),1009-1021. |
| MLA | Xu, Jiangbo,et al."Failure models of a loess stacked dam: a case study in the Ansai Area (China)".BULLETIN OF ENGINEERING GEOLOGY AND THE ENVIRONMENT 79.2(2020):1009-1021. |
入库方式： OAI收割
来源：地理科学与资源研究所
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。