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高堆石坝面防渗土工膜锚固区夹具效应破坏模型试验

吴海民, 束一鸣, 滕兆明, 蒋善平, 刘云锋

吴海民, 束一鸣, 滕兆明, 蒋善平, 刘云锋. 高堆石坝面防渗土工膜锚固区夹具效应破坏模型试验[J]. 岩土工程学报, 2016, 38(zk1): 30-36. DOI: 10.11779/CJGE2016S1006
引用本文: 吴海民, 束一鸣, 滕兆明, 蒋善平, 刘云锋. 高堆石坝面防渗土工膜锚固区夹具效应破坏模型试验[J]. 岩土工程学报, 2016, 38(zk1): 30-36. DOI: 10.11779/CJGE2016S1006
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WU Hai-min, SHU Yi-ming, TENG Zhao-ming, JIANG Shan-ping, LIU Yun-feng. Model tests on failure properties of geomembrane anchorage due to clamping effect in surface barrier of high rock-fill dam[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(zk1): 30-36. DOI: 10.11779/CJGE2016S1006
Citation: WU Hai-min, SHU Yi-ming, TENG Zhao-ming, JIANG Shan-ping, LIU Yun-feng. Model tests on failure properties of geomembrane anchorage due to clamping effect in surface barrier of high rock-fill dam[J]. Chinese Journal of Geotechnical Engineering, 2016, 38(zk1): 30-36. DOI: 10.11779/CJGE2016S1006
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高堆石坝面防渗土工膜锚固区夹具效应破坏模型试验  English Version

  • 河海大学水利水电学院,江苏 南京 210098

基金项目: 长江科学院开放研究基金项目（CKWV2015210/KY）; 国家自然科学基金项目（51409083,51379069）; 江苏高校优势学科建设
详细信息
    作者简介:

    吴海民(1982- ),男,博士,副教授,主要从事土石坝与堤防工程、土工合成材料工程应用方面的科研和教学工作。E-mail: wuhaimin@hhu.edu.cn。

Model tests on failure properties of geomembrane anchorage due to clamping effect in surface barrier of high rock-fill dam

  • College of Water Conservancy and Hydropower Engineering, Hohai University, Nanjing 210098, China

摘要

    摘要
  • 摘要: 针对高堆石坝面防渗土工膜锚固区易因夹具效应而发生拉伸破坏的问题,运用自研锚固结构模型试验装置对堆石坝面膜防渗体周边锚固结构处土工膜“夹具效应”破坏特性进行了一系列模型试验验证和分析。试验结果表明,在坝基和防渗墙或者坝面与岸坡岩体间发生差异沉降后,锚固区极小范围内的土工膜随接触材料一起发生位移而无法发生相对运动是夹具效应破坏的根源;传统直线型、折叠式及缠绕式铺膜锚固方式均无法避免因夹具效应而发生拉伸破坏;相同差异位移条件下,PVC膜承受差异变形的能力相对于PE和HDPE膜更强,在深覆盖层上高堆石坝防渗中应该首先考虑使用。
    Abstract: Tension failure of geomembrane in anchorage zone of surface barrier for high rock-fill dams will be inevitably caused by clamping effect. A set of model tests are performed to verify and analyze the failure properties of geomembrane due to the clamping effect in the anchorage zone of surface barrier using self-developed devices. The test results show that the geomembrane cannot move freely and yield tension failure when differential settlement occurs between dam foundation and cutoff wall or dam surface and rock of bank slope. The excessive friction between the geomembrane and the contacting material is the main reason of tension failure of the geomembrane in small anchorage zone. The traditional anchoring structures including line-shaped anchorage, spirally wrapped anchorage and folded anchorage will all inevitably induce the excessive tension defamation of geomembrane next to their connection to anchorage structure. Under the same differential settlement, PVC geomembrane exhibits a stronger adaptability to the differential deformation compared with to PE and HDPE geomembranes. So the PVC geomembrane should be a preferred selection when used as the surface barrier for high rock-fill dam on thick pervious foundation.
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    • 参考文献(9)
  • [1] 束一鸣, 李永红. 较高土石坝膜防渗结构设计方法探讨[J]．河海大学学报（自然科学版）, 2006, 34(1): 60-64. (SHU Yi-ming, LI Yong-hong. Design of impervious structure with geomembrane for high earth-rock dams[J]. Journal of Hohai University (Natural Sciences), 2006, 34(1): 60-64. (in Chinese))
    [2] 吴海民, 束一鸣, 曹明杰. 土工合成材料双向拉伸多功能试验机的研制及初步应用[J]. 岩土工程学报, 2014, 36(1): 170-175. (WU Hai-min, SHU Yi-ming, CAO Ming-jie, et al. Development and application of multi-functional biaxial tensile testing machine for geosynthetics[J]. Chinese Journal of Geotechnical Engineering, 2014, 36(1): 170-175. (in Chinese))
    [3] 花加凤, 束一鸣, 张贵科, 等. 土石坝坝面防渗膜中的夹具效应[J]. 水利水电科技进展, 2007, 27(2): 66-68. (HUA Jia-feng, SHU Yi-ming, ZHANG Gui-ke, et al. Clamping effect in geomembranes used for seepage control of upstream surface of earth-rock dams[J]. Advances in Science and Technology of Water Resources, 2007, 27(2): 66-68. (in Chinese))
    [4] GIROUD J P, SODERMAN K L, PELTE T, et al. Design method to prevent geomembrane failure in tank corners[J]. Geosynthetics International, 1995, 2(6) : 971-1018.
    [5] HULLINGS D E, SANSONE L J. Design concerns and performance of geomembrane anchor trenches[J]. Geotextiles and Geomembranes, 1997, 15: 403-417.
    [6] GIROUD J P,GLEASON M H, ZORNBERG J G. Design of geomembrane anchorage against wind action[J]. Geosynthetics International, 1999, 6(6): 481-507.
    [7] IMAIZUMI S, SEKIYA T, OZAWA K, et al. Ability of concrete anchorage for geomembrane barrier in landfill[C]// CCIGS. Geosynthetics in Civil and Environmental Engineering: 4th Asian Regional Conference on Geosynthetics. Shanghai, 2008: 502-507.
    [8] 束一鸣. 土工膜连接和缺陷渗漏量计算与缺陷渗流影响[J]. 人民长江, 2002a, 33(3): 26-28. (SHU Yi-ming. Geomembrane connection and defect leakage calculation and effect of defect flow[J]. Yangtze River, 2002a, 33(3): 26-28. (in Chinese))
    [9] 束一鸣. 土工膜施工工艺及其经验教训[J]. 水利水电技术, 2002b, 33(4): 19-21. (SHU Yi-ming. Construction technology and experience on geomembrane[J]. Water Resources and Hydropower Engineering, 2002, 33(4): 19-21. (in Chinese))
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  • 被引次数: 19
出版历程
  • 收稿日期:  2015-11-29
  • 发布日期:  2016-03-24

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