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Study of Anti-Sliding Stability of a Dam Foundation Based on the Fracture Flow Method with 3D Discrete Element Code

Author

Listed:
  • Chong Shi

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
    Institute of Geotechnical Research, Hohai University, Nanjing 210098, China)

  • Wenkun Yang

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
    Institute of Geotechnical Research, Hohai University, Nanjing 210098, China)

  • Weijiang Chu

    (HydroChina-ITASCA R&D Center, ITASCA Consulting Group, Hangzhou 311122, China)

  • Junliang Shen

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
    HydroChina-ITASCA R&D Center, ITASCA Consulting Group, Hangzhou 311122, China)

  • Yang Kong

    (Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
    Institute of Geotechnical Research, Hohai University, Nanjing 210098, China)

Abstract

Fractured seepage is an important factor affecting the interface stability of rock mass. It is closely related to fracture properties and hydraulic conditions. In this study, the law of seepage in a single fracture surface based on modified cubic law is described, and the three-dimensional discrete element method is used to simulate the dam foundation structure of the Capulin San Pablo (Costa Rica) hydropower station. The effect of construction joints and developed structure on dam stability is studied, and its permeability law and sliding stability are also evaluated. It is found that the hydraulic-mechanical coupling with strength reduction method in DEM is more appropriate to use to study the seepage-related problems of fractured rock mass, which considers practical conditions, such as the roughness of and the width of fracture. The strength reduction method provides a more accurate safety factor of dam when considering the deformation coordination with bedrocks. It is an important method with which to study the stability of seepage conditions in complex structures. The discrete method also provided an effective and reasonable way of determining seepage control measures.

Suggested Citation

  • Chong Shi & Wenkun Yang & Weijiang Chu & Junliang Shen & Yang Kong, 2017. "Study of Anti-Sliding Stability of a Dam Foundation Based on the Fracture Flow Method with 3D Discrete Element Code," Energies, MDPI, vol. 10(10), pages 1-15, October.
    • Handle: RePEc:gam:jeners:v:10:y:2017:i:10:p:1544-:d:114223
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