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土心墙堆石坝坝顶裂缝扩展有限元模拟

吉恩跃, 陈生水, 傅中志, 朱俊高

吉恩跃, 陈生水, 傅中志, 朱俊高. 土心墙堆石坝坝顶裂缝扩展有限元模拟[J]. 岩土工程学报, 2018, 40(S2): 17-21. DOI: 10.11779/CJGE2018S2004
引用本文: 吉恩跃, 陈生水, 傅中志, 朱俊高. 土心墙堆石坝坝顶裂缝扩展有限元模拟[J]. 岩土工程学报, 2018, 40(S2): 17-21. DOI: 10.11779/CJGE2018S2004
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JI En-yue, CHEN Sheng-shui, FU Zhong-zhi, ZHU Jun-gao. Numerical simulation of crest cracks in an earth core rockfill dam using extended finite element method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 17-21. DOI: 10.11779/CJGE2018S2004
Citation: JI En-yue, CHEN Sheng-shui, FU Zhong-zhi, ZHU Jun-gao. Numerical simulation of crest cracks in an earth core rockfill dam using extended finite element method[J]. Chinese Journal of Geotechnical Engineering, 2018, 40(S2): 17-21. DOI: 10.11779/CJGE2018S2004
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土心墙堆石坝坝顶裂缝扩展有限元模拟  English Version

  • 1. 南京水利科学研究院岩土工程研究所,江苏 南京 210024;
    2. 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;
    3. 河海大学岩土力学与堤坝工程教育部重点实验室,江苏 南京 210098

基金项目: 国家重点研发计划重点专项项目（2017YFC0404806）; 中国博士后基金项目（2018M630578）; 国家自然科学基金青年基金项目（51809182）; 中央级公益性科研院所业务费专项（Y318004）
详细信息
    作者简介:

    吉恩跃(1989- ),男,江苏盐城人,博士后,主要从事高土石坝安全评价理论与应用方面研究。E-mail：eyji@nhri.cn。

  • 中图分类号: TU43

Numerical simulation of crest cracks in an earth core rockfill dam using extended finite element method

  • 1. Geotechnical Engineering Department, Nanjing Hydraulic Research Institute, Nanjing 210024, China;
    2. Key Laboratory of Earth-Rock Dam Failure Mechanism and Safety Control Techniques, Ministry of Water Resources, Nanjing 210029, China;
    3. Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China

摘要

    摘要
  • 摘要: 基于ABAQUS计算平台,采用扩展有限元方法对某土心墙堆石坝坝顶裂缝的发生及扩展情况进行了模拟,针对含初始裂缝的简化平面有限元计算模型,得到了以下结论：坝顶裂缝的产生原因主要是上下游的不协调变形,上游坝壳的湿化变形会加剧此不协调变形;坝顶裂缝多出现在心墙下游侧,其扩展的方向为朝下游侧且与水平面呈45°左右夹角,初始裂缝的长度对裂缝扩展方向影响较小;开发编制了求裂纹扩展长度及开度的插件,以靠近心墙中心的初始裂缝为例,在库水压力及湿化作用下,裂缝扩展的平均长度为2.5 m,裂缝平均张开距离为0.18 m;初始裂缝越靠近心墙中部,裂缝扩展长度及开度越大。设计及施工中在加强接触部位碾压质量的同时应注重坝顶心墙中部的压实质量以减小坝顶裂缝发生的危害。
    Abstract: The extended finite element method combined in ABAQUS software is used to simulate the propagation of crest cracks of an earth core rockfill dam. For the simplified plane FEM model with initial cracks, the conclusions are obtained as follows: the main reason leading to the crest cracks is the uncoordinated deformation, and the effects of wetting deformation aggravate the uncoordinated deformation. The dam crest cracks are mostly distributed at the downstream side of core wall, and the direction is toward the downstream side within a certain depth and with about 45° to the horizontal surface. Besides, the initial length has little influences on the propagation direction of cracks. A plug-in for calculating the length and opening of the crack is compiled. Taking the crack closer to the center of core wall for an instance, the average propagation length of cracks is 2.5 m, and the average opening distance is 0.18 m. The closer the initial crack is to the center of the core wall, the larger the length and the opening of the cracks are. It is recommended that the quality of the middle part of dam core should be guaranteed during the design and construction periods.
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    • 参考文献(12)
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出版历程
  • 收稿日期:  2018-07-21
  • 发布日期:  2018-10-29

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