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Evaluation of the Behavior of Gotvand Rockfill Dam During Construction and Initial Impoundment Using Instrumentation Data and Numerical Modeling

Harif Bilondi, Zakie | 2014

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  1. Type of Document: M.Sc. Thesis
  2. Language: Farsi
  3. Document No: 46141 (09)
  4. University: Sharif University of Technology
  5. Department: Civil Engineering
  6. Advisor(s): Jafarzadeh, Fardin
  7. Abstract:
  8. Stability control of Rockfill dams during construction, first impoundment and during operation is of great importance. Increase in pore water pressure during construction and reservoir filling of rockfill dams with clay core can initiate or help the progress of the hydraulic fracture. Considering initiation of high excessive pore pressures while construction as an important causes of dam failure, precise estimation and analysis of It's variation will be necessary and will increase safety factor of dam stability.Horizontal and especially vertical displacements happening during Dam construction and reservoir filling and arching phenomenon in clay core while construction are the other factors controlling the stability of rockfill dams. The use of instrumentation in rockfill dams plays an important role in studying the static and dynamic behavior of dams and helps us to have a better control on the stability of the dam.This study investigates the stability of Gotvad Olya rockfill dam while construction and first impoundment by instrumentation data and modeling the highest dam cross section in a finite difference program named FLAC. Total stresses, pore pressures and vertical displacements calculated by program are analysed and compared with instrumentation data. There has been good acceptance between numerical results and instrumentation data.Constitutive models used for analysis are Mohr-Coulomb model for foundation and modified Strain Softening/Hardening model for dam body consisting of shells and mixed vertical clay core
  9. Keywords:
  10. Rockfill Dam ; Instrumentation ; Numerical Modeling ; Pore Water Pressure ; Stress-Strain Behavior ; FLAC Software

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