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Buckling Failure Mechanism of a Rock Dam Foundation Fractured by Gentle Through-Going and Steep Structural Discontinuities

Author

Listed:
  • Donghui Chen

    (College of Construction Engineering, Jilin University, Changchun 130026, China)

  • Huie Chen

    (College of Construction Engineering, Jilin University, Changchun 130026, China)

  • Wen Zhang

    (College of Construction Engineering, Jilin University, Changchun 130026, China)

  • Chun Tan

    (China Water Northeastern Investigation, Design & Research Co., Ltd., Changchun 130021, China
    North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Changchun 130021, China)

  • Zhifa Ma

    (China Water Northeastern Investigation, Design & Research Co., Ltd., Changchun 130021, China
    North China Power Engineering Co., Ltd. of China Power Engineering Consulting Group, Changchun 130021, China)

  • Jianye Chen

    (State Key Laboratory of Hydraulics and Mountain River Engineering, College of Water Resources and Hydropower, Sichuan University, Chengdu 610065, China)

  • Bo Shan

    (Northeast Electric Power Design Institute Co., Ltd., Changchun 130021, China)

Abstract

The failure mechanism analysis of dam foundations is key for designing hydropower stations. This study analyses the rock masses in a sluice section, which is an important part of the main dam of the Datengxia Hydropower Station currently built in China. The stability of the sluice rock masses is predominantly affected by gentle through-going soft interlayers and steep structural fractures. Its foundation failure mechanism is investigated by means of a numerical method, i.e., Universal Distinct Element Code (UDEC) and the geomechanical model method. The modeling principle and process, and results for the rock dam foundation are introduced and generated by using the abovementioned two methods. The results indicate that the failure mechanism of the foundation rock masses, as characterized by gentle through-going and steep structural discontinuities, is not a conventional type of shear failure mechanism but a buckling one. This type of failure mechanism is verified by analyzing the deformation features resulting from the overloading of both methods and strength reduction of the numerical method.

Suggested Citation

  • Donghui Chen & Huie Chen & Wen Zhang & Chun Tan & Zhifa Ma & Jianye Chen & Bo Shan, 2020. "Buckling Failure Mechanism of a Rock Dam Foundation Fractured by Gentle Through-Going and Steep Structural Discontinuities," Sustainability, MDPI, vol. 12(13), pages 1-20, July.
    • Handle: RePEc:gam:jsusta:v:12:y:2020:i:13:p:5426-:d:380687
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