Hydraulics of Jinnah Barrage; Existing Structure and Rehabilitation Alternatives
Abstract
Jinnah barrage has passed more than seventy years of its useful life and is facing some structural and hydraulic problems. Irrigation & Power Department, Government of Punjab, Pakistan engaged Evaluation Consultants (EC) in the Year 1998 to review physical health of the Jinnah barrage. Evaluation consultants noted that the energy dissipation problems persist downstream of the barrage. Feasibility study on “Rehabilitation and Modernization of Jinnah Barrage” completed in Year 2005, proposed subsidiary weir with crest at EL676, to be constructed across the river, at a distance of about 800 ft, downstream of the barrage to address energy dissipation problems. The crest level of proposed subsidiary weir (EL676) is lower by 2 ft and higher by 1 ft as compared with crest level of weir and undersluices sections of the barrage, respectively. The proposed structure if constructed, adversely affect the hydraulic performance of the barrage. A detailed surface flow analysis was carried out using computer software HEC-RAS for the existing structure, the proposed subsidiary weir and its alternatives, to optimize rehabilitation works. This paper discusses the calibration of HEC-RAS model, the surface flow hydraulics of subsidiary weir and its alternatives.References
. T. Yoshida, F. Tatsuoka; Proc. of the Fourteenth International Conference on Soil Mechanics and Foundation Engineering, Hamburg, Germany, 1(1997) 237-240.
. J. Dong, K. Nakamura; Proc. of the Fourteenth International Conference on Soil Mechanics and Foundation Engineering, Hamburg, Germany, 1(1997) 81-84.
. L.Q. AnhDan, J. Koseki, T. Sato; Geotechnical Testing Journal, 29(2006), No.5 (in print).
. K. Hayano, J. Koseki, T. Sato, F. Tatsuoka; Proc. of Pre-failure Deformation Characteristics of Geomaterials, Jamiolkowski, Lancellotta and Lo Presti (eds.), 1(1999) 191-198.
. F. Santucci de Magistris, J. Koseki, M. Amaya, S. Hamaya, T. Sato, F. Tatsuoka; Geotechnical Testing Journal, ASTM, 22(1999), No.1, 44-60.
. S. Goto, F. Tatsuoka, S. Shibuya, Y. S. Kim, T. Sato; Soils and Foundations, 1(1991), Vol.31, 169-180.
. F. Tatsuoka, O. Haibara; Soils and Foundations, 25(1985), No.1, 89-98.
. S. Maqbool, J. Koseki, T. Sato; Bulletin of Earthquake Resistant Structure (ERS), IIS, The University of Tokyo, 37(2004) 41-50.
. S. Maqbool; PhD thesis submitted to Civil Engineering Department, The University of Tokyo, Japan (2005).
.S. Maqbool, J. Koseki, T. Sato; Journal of Geotechnical and Geoenvironmental Engineering, ASCE, (submitted in 2007 for possible publication).
.Y. Kohata, F. Tatsuoka, J. Dong, S. Teachavorasinskun, K Mizumoto; Proc. of International Symposium on Pre-failure Deformation of Geomaterials, 1(1994) 3-10.
.ASTM D1557-00: Standard test methods for laboratory compaction characteristics of soil using modified effort (2700 kN-m/m3 ).
.J. Koseki, F. Tatsuoka, Y. Munaf, M. Tateyama, K. Kojima; Soils and Foundations, Special Issue on Geotechnical Aspects of the January 17 1995 Hyogoken
