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特高面板砂砾石坝结构安全性论证

陈生水, 阎志坤, 傅中志, 李国英

陈生水, 阎志坤, 傅中志, 李国英. 特高面板砂砾石坝结构安全性论证[J]. 岩土工程学报, 2017, 39(11): 1949-1958. DOI: 10.11779/CJGE201711001
引用本文: 陈生水, 阎志坤, 傅中志, 李国英. 特高面板砂砾石坝结构安全性论证[J]. 岩土工程学报, 2017, 39(11): 1949-1958. DOI: 10.11779/CJGE201711001
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CHEN Sheng-shui, YAN Zhi-kun, FU Zhong-zhi, LI Guo-ying. Evaluation of safety performance of extremely high slab-faced gravel dams[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(11): 1949-1958. DOI: 10.11779/CJGE201711001
Citation: CHEN Sheng-shui, YAN Zhi-kun, FU Zhong-zhi, LI Guo-ying. Evaluation of safety performance of extremely high slab-faced gravel dams[J]. Chinese Journal of Geotechnical Engineering, 2017, 39(11): 1949-1958. DOI: 10.11779/CJGE201711001
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特高面板砂砾石坝结构安全性论证  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

基金项目: 国家重点研发计划重点专项项目（2017YFC0404800）; 国家自然科学基金项目（51379130,51539006）; 水利行业公益性专项经费项目（201501035）
详细信息
    作者简介:

    陈生水(1962-),男,江苏南京人,博士,教授级高级工程师,主要从事岩土与土石坝工程方面的科学研究与技术咨询工作。E-mail:sschen@nhri.cn。

  • 中图分类号: TV641, TU43

Evaluation of safety performance of extremely high slab-faced gravel dams

  • 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

摘要

    摘要
  • 摘要: 基于试验研究与数值计算分析,对新疆大石峡250 m级特高面板砂砾石坝结构安全性进行了论证。结果表明：压实后的砂砾石料有较高的变形模量、较小的流变和地震残余变形,大坝运行期坝体最大沉降仅为最大坝高的0.64%;设计地震用下坝体最大震陷量仅为最大坝高的0.40%;静、动力荷载作用下,面板周边缝的沉陷和张拉值均未超过国内外已建工程的最大实测值,周边缝的剪切位移虽然比国内外已建工程的最大实测值大,但中国在混凝土面板接缝止水结构与材料方面的技术储备已经能够满足其要求。因此,与相同高度的面板堆石坝相比,面板砂砾石坝变形安全控制的难度较小。需要指出的是,250 m级特高砂砾石坝的防渗面板在静、动力荷载作用下的轴向和顺坡向拉、压应力极值较高,有必要在面板周边缝和压性垂直缝两侧一定范围配置加强钢筋。
    Abstract: The structural safety performance of Dashixia concrete face gravel dam (CFGD), an extremely high CFGD in Xinjiang, is studied based on the large-scale triaxial experiments on dam materials and the detailed finite element method-based numerical analyses. Compacted gravel materials are found to exhibit high deformation modulus, small magnitude of creep and small magnitude of shaking-induced residual deformation. The maximum settlement of Dashixia CFGD during operation is evaluated to be about 0.64% of the dam height, while the earthquake-induced permanent settlement at the crest is about 0.40% of the dam height. The maximum settlement and tension of the peripheral joints do not exceed the maximum measured ones in the investigated existing cases. The shear displacement, on the other hand, is larger than all the measured ones in these cases. However, the advancement in sealing structures and materials achieved in China can already satisfy the need of CFGDs as high as 250 m. Therefore, it can be concluded that the difficulty in deformation control is relatively less compared with that of rockfill dams with similar height. What deserves special attention, on the other hand, is the high static and dynamic stresses in concrete slabs, both along the axial and slope directions. The reinforcements near some peripheral joints and the compressive vertical joints are necessary.
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出版历程
  • 收稿日期:  2017-06-29
  • 发布日期:  2017-11-24

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