Article(id=1223196806885003781, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, articleNumber=null, orderNo=null, doi=10.20040/j.cnki.1000-7709.2023.20230323, pmid=null, cstr=null, oa=null, hot=null, price=null, onlineType=0, articleFormat=0, articleType=null, articleTypeStr=null, receivedDate=1678032000000, receivedDateStr=2023-03-06, revisedDate=1680019200000, revisedDateStr=2023-03-29, acceptedDate=null, acceptedDateStr=null, onlineDate=1769562444658, onlineDateStr=2026-01-28, pubDate=1692892800000, pubDateStr=2023-08-25, doiRegisterDate=null, doiRegisterDateStr=null, onlineIssueDate=1769562444658, onlineIssueDateStr=2026-01-28, onlineJustAcceptDate=null, onlineJustAcceptDateStr=null, onlineFirstDate=null, onlineFirstDateStr=null, sourceXml=null, magXml=null, createTime=1769562444658, creator=13701087609, updateTime=1769562444658, updator=13701087609, issue=Issue{id=1223196803663778281, tenantId=1146029695717560320, journalId=1205116964453384197, year='2023', volume='41', issue='8', pageStart='1', pageEnd='222', issueExtLink='null', onlineDate='null', pubDate='null', beforeIssueId=null, nextIssueId=null, price=null, status=1, issueComplete=1, articleOrder=1, issueType=-1, specialIssue=null, createTime=1769562443888, creator=13701087609, updateTime=1769563793740, updator=13701087609, preIssue=null, nextIssue=null, ext={EN=IssueExt(id=1223202465391166440, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, language=EN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=), CN=IssueExt(id=1223202465391166441, tenantId=1146029695717560320, journalId=1205116964453384197, issueId=1223196803663778281, language=CN, specialIssueTitle=, coverIllustrator=null, specialIssueEditor=, specialIssueAbout=)}, issueFiles=null}, startPage=121, endPage=125, ext={EN=ArticleExt(id=1223196808831160924, articleId=1223196806885003781, tenantId=1146029695717560320, journalId=1205116964453384197, language=EN, title=Study on Impact of Extreme Weather Conditions on Stability Characteristics of Earth-Rockfill Dam, columnId=1222925280734335368, journalTitle=Water Resources and Power, columnName=DAM SAFETY AND MONITORING, runingTitle=null, highlight=null, articleAbstract=

Affected by global climate change and human activities, extreme weather events such as drought and rainfall have led to landslides and other disasters in the reservoir dam. At the same time, the impact of evaporation and rainfall on the seepage and stability of the dam slope has not been considered in the design specifications for roller compacted earth-rockfill dams. Taking an earth-rockfill dam as the research object, a finite element calculation model was established to study the impacts of evaporation, rainfall and reservoir water level changes on the pore water pressure, saturation line and safety factor of anti-sliding stability of the earth-rockfill dam. And the cause mechanism of landslide was analyzed in combination with geological exploration and monitoring data. The results show that evaporation and rainfall have a great impact on the pore water pressure of the soil within 0~2 m of the downstream dam slope. The difference between the measured water level of the piezometer and the saturation line calculated by the finite element method is less than 0.4 m. At the initial stage, evaporation improves the stability of the dam slope, but evaporation causes the surface fill of the dam body to shrink and crack continuously, providing a channel for rainfall infiltration. With the increase of the number of rainfall and evaporation cycles and the rising of the reservoir water level, the cracks continue to increase, and the local stagnant areas near the bottom of the cracks are interconnected to form a saturation zone, which leads to the instability and damage of the shallow dam slope downstream of the dam. The research results provide a scientific basis for improving the design specifications of earth-rockfill dams and the early warning of reservoir dam landslides.

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受全球气候变化和人类活动的影响,干旱、降雨等极端气候导致水库大坝产生了滑坡等灾害,同时碾压式土石坝设计规范未考虑蒸发、降雨对大坝坝坡渗流和稳定性的影响。对此,构建了某土石坝有限元计算模型,研究了蒸发、降雨和库水位作用对土石坝孔隙水压力、浸润线和坝坡抗滑稳定安全系数的影响,并结合地勘和监测资料分析了滑坡的成因机制。研究结果表明,蒸发、降雨对下游坝坡0~2 m范围土体的孔隙水压力影响较大;测压管实测水位与有限元计算浸润线差值小于0.4 m;初始阶段蒸发作用提高了坝坡稳定性,但蒸发作用导致坝体表层填土不断收缩、开裂,为降雨入渗提供了通道,随着降雨、蒸发循环次数的增加和库水位上升,裂缝不断增加,裂缝底部附近的局部滞水区相互连通形成饱和带,从而导致大坝下游浅层坝坡失稳破坏;研究结果为完善土石坝设计规范和水库大坝滑坡预警提供了科学依据。

, correspAuthors=null, authorNote=null, correspAuthorsNote=
李卓(1979-),男,博士、正高级工程师,研究方向为水工建筑物防冻胀和水库大坝安全评价,E-mail:
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罗登科(1972-),男,硕士、高级工程师,研究方向为水利工程建设管理,E-mail:

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罗登科(1972-),男,硕士、高级工程师,研究方向为水利工程建设管理,E-mail:

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罗登科(1972-),男,硕士、高级工程师,研究方向为水利工程建设管理,E-mail:

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极端气候条件对某土石坝稳定特性的影响研究
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罗登科 1 , 方艺翔 2 , 李卓 2, 3 , 刘欣怡 2
水电能源科学 | 大坝安全与监测 2023,41(8): 121-125
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水电能源科学 | 大坝安全与监测 2023, 41(8): 121-125
极端气候条件对某土石坝稳定特性的影响研究
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罗登科1 , 方艺翔2, 李卓2, 3 , 刘欣怡2
作者信息
  • 1.宁夏彭阳县水务局,宁夏 彭阳 756500
  • 2.南京水利科学研究院大坝安全与管理研究所,江苏 南京 210029
  • 3.水利部大坝安全管理中心,江苏 南京 210029
  • 罗登科(1972-),男,硕士、高级工程师,研究方向为水利工程建设管理,E-mail:

通讯作者:

李卓(1979-),男,博士、正高级工程师,研究方向为水工建筑物防冻胀和水库大坝安全评价,E-mail:
Study on Impact of Extreme Weather Conditions on Stability Characteristics of Earth-Rockfill Dam
Deng-ke LUO1 , Yi-xiang FANG2, Zhuo LI2, 3 , Xin-yi LIU2
Affiliations
  • 1.Water Affairs Bureau of Pengyang County, Pengyang 756500, China
  • 2.Dam Safety Management Department, Nanjing Hydraulic Research Institute, Nanjing 210029, China
  • 3.Dam Safety Management Center of the Ministry of Water Resources, Nanjing 210029, China
出版时间: 2023-08-25 doi: 10.20040/j.cnki.1000-7709.2023.20230323
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受全球气候变化和人类活动的影响,干旱、降雨等极端气候导致水库大坝产生了滑坡等灾害,同时碾压式土石坝设计规范未考虑蒸发、降雨对大坝坝坡渗流和稳定性的影响。对此,构建了某土石坝有限元计算模型,研究了蒸发、降雨和库水位作用对土石坝孔隙水压力、浸润线和坝坡抗滑稳定安全系数的影响,并结合地勘和监测资料分析了滑坡的成因机制。研究结果表明,蒸发、降雨对下游坝坡0~2 m范围土体的孔隙水压力影响较大;测压管实测水位与有限元计算浸润线差值小于0.4 m;初始阶段蒸发作用提高了坝坡稳定性,但蒸发作用导致坝体表层填土不断收缩、开裂,为降雨入渗提供了通道,随着降雨、蒸发循环次数的增加和库水位上升,裂缝不断增加,裂缝底部附近的局部滞水区相互连通形成饱和带,从而导致大坝下游浅层坝坡失稳破坏;研究结果为完善土石坝设计规范和水库大坝滑坡预警提供了科学依据。

土石坝  /  蒸发  /  降雨  /  库水位  /  滑坡

Affected by global climate change and human activities, extreme weather events such as drought and rainfall have led to landslides and other disasters in the reservoir dam. At the same time, the impact of evaporation and rainfall on the seepage and stability of the dam slope has not been considered in the design specifications for roller compacted earth-rockfill dams. Taking an earth-rockfill dam as the research object, a finite element calculation model was established to study the impacts of evaporation, rainfall and reservoir water level changes on the pore water pressure, saturation line and safety factor of anti-sliding stability of the earth-rockfill dam. And the cause mechanism of landslide was analyzed in combination with geological exploration and monitoring data. The results show that evaporation and rainfall have a great impact on the pore water pressure of the soil within 0~2 m of the downstream dam slope. The difference between the measured water level of the piezometer and the saturation line calculated by the finite element method is less than 0.4 m. At the initial stage, evaporation improves the stability of the dam slope, but evaporation causes the surface fill of the dam body to shrink and crack continuously, providing a channel for rainfall infiltration. With the increase of the number of rainfall and evaporation cycles and the rising of the reservoir water level, the cracks continue to increase, and the local stagnant areas near the bottom of the cracks are interconnected to form a saturation zone, which leads to the instability and damage of the shallow dam slope downstream of the dam. The research results provide a scientific basis for improving the design specifications of earth-rockfill dams and the early warning of reservoir dam landslides.

earth-rockfill dam  /  evaporation  /  rainfall  /  reservoir water level  /  landslide
罗登科, 方艺翔, 李卓, 刘欣怡. 极端气候条件对某土石坝稳定特性的影响研究. 水电能源科学, 2023 , 41 (8) : 121 -125 . DOI: 10.20040/j.cnki.1000-7709.2023.20230323
Deng-ke LUO, Yi-xiang FANG, Zhuo LI, Xin-yi LIU. Study on Impact of Extreme Weather Conditions on Stability Characteristics of Earth-Rockfill Dam[J]. Water Resources and Power, 2023 , 41 (8) : 121 -125 . DOI: 10.20040/j.cnki.1000-7709.2023.20230323
  • 国家自然科学基金项目(51979173)
2023年第41卷第8期
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doi: 10.20040/j.cnki.1000-7709.2023.20230323
  • 接收时间:2023-03-06
  • 首发时间:2026-01-28
  • 出版时间:2023-08-25
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  • 收稿日期:2023-03-06
  • 修回日期:2023-03-29
基金
国家自然科学基金项目(51979173)
作者信息
    1.宁夏彭阳县水务局,宁夏 彭阳 756500
    2.南京水利科学研究院大坝安全与管理研究所,江苏 南京 210029
    3.水利部大坝安全管理中心,江苏 南京 210029

通讯作者:

李卓(1979-),男,博士、正高级工程师,研究方向为水工建筑物防冻胀和水库大坝安全评价,E-mail:
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2种不同金属材料的力学参数

Family
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Number of
genus
种数
Number of
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占总种数比例
Percentage of
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Genus
种数
Number of
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占总种数比例
Percentage of total
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鹅膏菌科Amanitaceae 2 11 5.26 鹅膏菌属 Amanita 10 4.78
小菇科 Mycenaceae 2 12 5.74 丝盖伞属 Inocybe 5 2.39
多孔菌科 Polyporaceae 8 14 6.70 蜡蘑属 Laccaria 5 2.39
红菇科 Russulaceae 3 23 11.00 小皮伞属 Marasmius 6 2.87
小菇属 Mycena 11 5.26
光柄菇属 Pluteus 5 2.39
红菇属 Russula 17 8.13
栓菌属 Trametes 5 2.39
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