Saturated-unsaturated seepage analysis by finite element method : a case of Tarbela Dam, Pakistan | |
| Author | Naushahi, Parvez Akhtar |
| Call Number | AIT Thesis no.GT-91-04 |
| Subject(s) | Finite element method Embankments--Pakistan Dams--Pakistan--Foundations |
| Note | A thesis submitted in partial fulfilment of the requirements for the degree of Master of Engineering, School of Engineering and Technology |
| Publisher | Asian Institute of Technology |
| Series Statement | Thesis ; no. GT-91-04 |
| Abstract | The Seepage Analysis of Tarbela Dam in Pakistan, which is the largest in the world in terms of Embankment Volume, was carried out using Saturated-Unsaturated Seepage Finite Element Method. This method is based on the Invariant Mesh technique. The analysis was limited to the Main Embankment Dam (MED) and its Upstream Impervious Blank.et. Computer Code UNSAF2D , written in F'ORTRAN 77 is used for the analysis. The Dam has been performing very well and the Seepage monitoring data of last 15 years was collected to compare with the theoretically calculated values. The analysis is done for various stages of Reservoir Filling, Depleting and Different conditions of Sedimentation in the reservoir. The Steady State Analysis at 3 different reservoir levels was also carried out. The comparison of calculated and observed values shows a good agreement for all the cases analysed. One of the pronounced feature of the Tarbela Dam is its unusually long upstream impervious Blank.et. The purpose of the construction of this blanket was to control the seepage and the Uplift Pressure of the Dam built on very thick pervious Alluvium deposits of The Indus River. The computed results explain very well the function of this upstream Blanl<.et and also its Permeability characteristics change with time due to the accumulation of large amount of Sediments on it. |
| Year | 1991 |
| Corresponding Series Added Entry | Asian Institute of Technology. Thesis ; no. GT-91-04 |
| Type | Thesis |
| School | School of Engineering and Technology (SET) |
| Department | Department of Civil and Infrastucture Engineering (DCIE) |
| Academic Program/FoS | Geotechnical and Transportation Engineering (GT) |
| Chairperson(s) | Honjo, Y.; |
| Examination Committee(s) | Balasubramanium, A.S.;Bergado, D.T.; |
| Scholarship Donor(s) | Government of Japan.; |
| Degree | Thesis (M.Eng.) - Asian Institute of Technology |