تأثير استخدام  حصيرة كتيمة في قوى الرفع أسفل السدود البيتونية

صفاء الديب

doi:10.5281/zenodo.20117519

Authors

Dr. Eng. Safaa Aldeeb Al Wataniya Private University

DOI:

https://doi.org/10.5281/zenodo.20117519

Keywords:

Seepage, Concrete Dam, Uplift Pressure, Cutoffs

Abstract

In this research paper, we have studied the effect of using an impermeable blanket and compare it with the usage of cutoffs on the uplift pressure under concrete dams. This comparison has been conducted numerically, by using the element method, with the help of the Groundwater Modeling System software program. The length of the impermeable blanket has been modified according to length of the dam base, for different values of length of cutoffs. It has been found that the existence an impermeable blanket with two cutoffs doesn't lead to decreasing the uplift pressure force in comparison with the state of the non-existence of an impermeable blanket. Also, it has been concluded that using an impermeable blanket with one single cutoff at the beginning of the dam leads to decreasing the uplift pressure force by 17% in comparison with the state of the non-existence of the an impermeable blanket, if the length of blanket is larger than the depth of the front cutoff.

Downloads

Download data is not yet available.

References

[1] B. Ibrahim and H. Shaaban, Water Facilities (1). Directorate of Books and Publications, Homs University, 1995, 261 pp.

[2] A. S. Chawla, “Design of hydraulic structures with intermediate filters,” Journal of Hydraulic Engineering Division, ASCE, vol. 102, no. 1, pp. 15–29, 1986.

[3] A. F. El-Ubayadi, N. S. Kharuffa, and R. H. Al-Suhayli, “Exit gradient variation in hydraulic structures downstream side,” Journal of Engineering and Technology, Baghdad, vol. 5, no. 3, pp. 157–172, 1988.

[4] A. Harr, Ground Water and Seepage. McGraw-Hill, 1962, P. 313.

[5] R. H. Irzooki, “The influence of piles status on the uplift pressure under hydraulic structures,” Tikrit Journal of Engineering Sciences, University of Tikrit, vol. 13, no. 1, pp. 1–21, 2006.

[6] R. B. Karim, “Variation of uplift pressure,” M.Sc. thesis, Dept. Civil Eng., Dept. Irrigation and Drainage, University of Baghdad, 1988, 34 pp.

[7] N. S. Kharuffa, “Water percolation under barrages and calculation of Hindia Barrage,” Continuing Education, University of Baghdad, pp. 20–45, 1987.

[8] W. S. Mohammed-Ali, “The effect of middle sheet pile on the uplift pressure under hydraulic structures,” European Journal of Scientific Research, vol. 65, no. 3, pp. 350–359, 2011.

[9] A. M. Nasir, “Finite element for seepage below hydraulic structures on anisotropic soil foundation,” M.Sc. thesis, Dept. Civil Eng., College of Engineering, University of Basra, 1993, pp. 30–60.