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A comparison between monitoring and analysis of Taleghan rockfill dam during construction

Haeri, S. M ; Sharif University of Technology

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  1. Type of Document: Article
  2. DOI: 10.3233/978-1-60750-031-5-2088
  3. Abstract:
  4. The construction of 103 m high Taleghan rockfill dam in Iran has recently been completed and reservoir impounding has also recently been started. The behavior of different sections of the dam have been monitored during construction using various devices such as settlement gauges, earth pressure cells and pore pressure piezometers. A comprehensive finite element study has been implemented in this regard as well to study the behavior of Taleghan rockfill dam during construction with consideration of unsaturated behavior of the materials of the dam. A 2D coupled analysis was performed using ABAQUS software. The behavior of the materials of the core and rockfill were assumed to follow Modified Drucker-Prager/Cap and Modified Drucker-Prager respectively. Shear and volumetric plastic strains and stresses, displacements and pore pressure in different parts of the dam obtained from the analysis are compared with the stresses, displacements and pore pressures measured by monitoring devices. Two important aspects of the geomechanical behavior of the dam during construction namely arching effect and pore pressure ratio (r u) both theoretically using FE analysis and experimentally using measured values are addressed in this paper as well. The results of the comparison show that a good agreement between analyses and observational data is present using unsaturated and double surface plasticity soil model. However, the outcome of the comparison shows that elastic and single surface elasto-plastic models are not able to well predict the behavior of the core of earth and rockfill dams during construction. The "arching effect" is also observed in clay core of the dam based on both numerical analysis and the measurements of earth pressure cells installed and monitored in the core of the dam. © 2009 IOS Press
  5. Keywords:
  6. Modeling ; Monitoring ; Rockfill dam ; ABAQUS software ; Analysis ; Arching effects ; Clay cores ; Coupled analysis ; Drucker-Prager ; During construction ; Earth and rock-fill dam ; Earth pressure cell ; Elasto-plastic models ; FE analysis ; Finite-element study ; Geomechanical behavior ; Monitoring and analysis ; Monitoring device ; Observational data ; Pressure ratio ; Reservoir impounding ; Rock Fills ; Soil model ; Surface plasticity ; Construction ; Dams ; Geologic models ; Geotechnical engineering ; Models ; Numerical analysis ; Pore pressure ; Rock mechanics ; Rocks ; Soil mechanics ; Thermoelectricity ; Unsaturated polymers ; Reservoirs (water)
  7. Source: Proceedings of the 17th International Conference on Soil Mechanics and Geotechnical Engineering: The Academia and Practice of Geotechnical Engineering, 5 October 2009 through 9 October 2009 ; Volume 3 , 2009 , Pages 2088-2091 ; 9781607500315 (ISBN)
  8. URL: http://ebooks.iospress.nl/publication/30396