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Energies 2017, 10(10), 1544; doi:10.3390/en10101544

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

1
Key Laboratory of Ministry of Education for Geomechanics and Embankment Engineering, Hohai University, Nanjing 210098, China
2
Institute of Geotechnical Research, Hohai University, Nanjing 210098, China
3
HydroChina-ITASCA R&D Center, ITASCA Consulting Group, Hangzhou 311122, China
*
Author to whom correspondence should be addressed.
Received: 25 July 2017 / Revised: 5 September 2017 / Accepted: 2 October 2017 / Published: 6 October 2017
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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. View Full-Text
Keywords: seepage flow; anti-sliding stability; discrete element method; dam foundation seepage flow; anti-sliding stability; discrete element method; dam foundation
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Shi, C.; Yang, W.; Chu, W.; Shen, J.; Kong, Y. Study of Anti-Sliding Stability of a Dam Foundation Based on the Fracture Flow Method with 3D Discrete Element Code. Energies 2017, 10, 1544.

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