| 黏土心墙堆石坝变形协调评判指标与各区渗透性能影响研究 |
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| 引用本文： | 王芳,郑东健,何勇军,李宏恩.黏土心墙堆石坝变形协调评判指标与各区渗透性能影响研究[J].水利水电技术,2021,52(2):81-88. |
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| 作者姓名： | 王芳 郑东健 何勇军 李宏恩 |
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| 作者单位： | 1. 河海大学 水利水电学院，江苏 南京 210098; 2. 南京水利科学研究院， 江苏 南京 210029; 3. 水利部土石坝破坏机理与防控技术重点实验室，江苏 南京 210029 |
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| 基金项目： | 国家重点研发计划项目(2016YFC0401809，2017YFC0405006);国家自然科学基金项目(51579154);江苏省水利科技项目(2017005);中央级公益性科研院所基本科研业务费项目(Y717012，Y718001) |
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| 摘 要： | 针对黏土心墙坝的变形不协调易导致坝体开裂、滑坡等险情发生的问题,对顺河向以及不同材料接触面变形的协调进行分析。结合实际工程,通过数值模拟,开展了运行期库水位下降工况黏土心墙堆石坝变形协调分析,提出了顺河向不同材料接触面变形协调的离散系数评判指标,分析了库水位下降情况下黏土心墙坝内部变形协调性与对各区渗透性能的影响。结果表明:(1)反滤层接触面上顺河向变形主要受到心墙与坝壳料渗透性能的影响,与心墙渗透系数成正比、与坝壳料渗透系数成反比,反滤层渗透性能对接触面变形协调的影响小;(2)黏土心墙料、反滤层Ⅰ、反滤层Ⅱ及坝壳料渗透系数分别为5.00×10~(-7) cm/s、3.27×10~(-3) cm/s、1.00×10~(-2) cm/s、6.84×10~(-2) cm/s时,实例工程的沉降变形及顺河向变形最为协调。
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| 关 键 词： | 黏土心墙 变形协调 渗透性能 非稳定渗流 |
| 收稿时间： | 2020-11-03 |
Study on evaluation index of deformation compatibility and influence of permeability of each filling zone of rockfill dam with clay core |
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| WANG Fang,ZHENG Dongjian,HE Yongjun,LI Hongen.Study on evaluation index of deformation compatibility and influence of permeability of each filling zone of rockfill dam with clay core[J].Water Resources and Hydropower Engineering,2021,52(2):81-88. |
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| Authors: | WANG Fang ZHENG Dongjian HE Yongjun LI Hongen |
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| Affiliation: | 1. College of Water Conservancy and Hydropower Engineering，Hohai University，Nanjing 210098，Jiangsu，China; 2. Nanjing Hydraulic Research Institute，Nanjing 210029，Jiangsu，China; 3. Key Laboratory of Earth-Rock Dam Failure Mechanism and Safety Control Techniques，Ministry of Water Resources，Nanjing 210029，Jiangsu，China |
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| Abstract: | Aiming at the problem that the incompatible deformation of the rockfill dam with clay core is prone to lead to the occurrences of the dangerous situations of dam body cracking，landslide etc．，the deformation compatibilities along-river and at the contact faces of different materials are analyzed herein． In combination with an actual engineering project，the deformation compatibility of the rockfill dam with clay core under the condition of reservoir water level drop during operation period is analyzed herein through the relevant numerical simulation，and then the discrete coefficient evaluation indexes of the along-river deformation compatibilities of the contact faces of different materials are put forward，while the internal deformation compatibility and the influence of each filling zone of the rockfill dam with clay core under the condition of the reservoir water level drop are analyzed as well． The results show that ( 1) the along-river deformation on the filter layer contact face is mainly affected by both the permeabilities of the core wall and the dam shell material，which is directly proportional to the permeability coefficient of the core wall and inversely proportional to the permeability coefficient of the dam shell material，while the influence from the permeability of the filter layer on the contact face deformation compatibility is less; ( 2) when the permeability coefficients of the clay core material，the filter layer I，the filter layer II and the dam shell material are 5. 00×10－7 cm/s，3. 27×10－3 cm/s，1. 00×10－2 cm/s， and 6. 84×10－2 cm/s respectively，the settlement deformation and the along-river deformation of the actual project are the most compatible． |
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| Keywords: | clay core deformation compatibility permeability unsteady seepage |
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