On the Optimum Layout of a Drainage Gallery in Concrete Gravity Dams on Isotropic Foundation

Date

2019-11-01

Author

Daghestani, Tameem
Çalamak, Melih
Yanmaz, Ali Melih

Metadata

Show full item record

This work is licensed under a Creative Commons Attribution-NonCommercial-NoDerivatives 4.0 International License.

Item Usage Stats

166
views

0
downloads

This study investigates the optimum location of drainage galleries of concrete gravity dams under usual, unusual, and extreme loading conditions. The uplift and the stress distributions were computed using the gravity method and the beam theory, whereas the leakage rate into the gallery was determined by the finite-element method. The results show that the presence of a drainage gallery can reduce the uplift by over 60 percent compared to a non-drained case. The suitable gallery location shifts toward the upstream if the drain diameter increases and the spacing decreases. This is consistent with previous research. As the gallery is moved toward the downstream, the crack length decreases; however, this increases the uplift. The most effective solution is found to be placing the gallery 10 percent of the base width away from the heel and at the downstream water level or below and adding post-tension cables on the downstream side. This option also yields lower pumping costs by reducing the pump head.

Subject Keywords

Concrete gravity dam, Drainage gallery, Uplift, Seepage, Performance

URI

https://hdl.handle.net/11511/33065

Journal

ENVIRONMENTAL & ENGINEERING GEOSCIENCE

DOI

https://doi.org/10.2113/eeg-2206

Collections

Department of Civil Engineering, Article

Suggestions

OpenMETU
Core

On the Stability of Moderate Height Berm-Type Earthen Dams: The Hancagiz Dam Example Çalamak, Melih; Yanmaz, Ali Melih (Springer Science and Business Media LLC, 2020-08-01) This study investigates the effects of berm properties on a moderate height earthen dam stability. The impacts of different berm heights, numbers and widths on the safety of the Hancagiz Dam are determined by analyzing the seepage through the dam and the slopes' stability under steady-state, rapid fill and rapid drawdown conditions with the finite-element method. The results showed that increasing the upstream berm height, number, or width of berms provides higher safety factors for the upstream slope. Howe...
Pseudo-dynamic testing of a concrete gravity dam Aldemir, Alper; Binici, Barış; Arıcı, Yalın; Kurç, Özgür; Canbay, Erdem (2015-09-01) Inspired from the simplified single degree of freedom modeling approach used in the preliminary design of concrete gravity dams, a pseudo-dynamic testing method was devised for the seismic testing of a concrete gravity dam section. The test specimen was a 1/75 scaled section of the 120-m-high monolith of the Melen Dam, one of the highest concrete gravity dams to be built in Turkey. The single degree of freedom idealization of the dam section was validated in the first stage of the study using numerical simu...
A comprehensive evaluation of possible eutrophication control methods for Keban dam reservoir with special emphasis on pre-dam construction Karul, C; Soyupak, S; Tuncer, A; Mukhallalati, L; Cilesiz, AF (1997-05-01) This study evaluates the available eutrophication control techniques that could be applied in Keban Dam Reservoir. A limited reduction of phosphorous was shown to be achieved by pre-dam construction on the major nutrient source, Murat River. Biomanipulation was evaluated as an ineffective method. A performed analysis has shown that only a drainage basin management program may decrease the phosphorous loading to the extent desired.
Preliminary seismic performance assessment procedure for existing RC buildings Yakut, Ahmet (2004-08-01) A preliminary procedure to assess rapidly the likely seismic performance of existing reinforced concrete buildings is presented. In this procedure, a Capacity Index is computed considering the orientation, size and material properties of the components comprising the lateral load resisting structural system. This index is then modified by several coefficients that reflect the quality of workmanship and materials, and architectural features. The procedure has been tested and calibrated based on the data comp...
Investigation of the relationship of seismic intensity measures and the accumulation of damage on concrete gravity dams using incremental dynamic analysis Soysal, BERAT FEYZA; Binici, Barış; Arıcı, Yalın (2016-04-25) Nonlinear analysis tools are gaining prominence for the design and evaluation of concrete gravity dams. The performance limits of concrete gravity dams within the framework of performance based design are challenging to determine in comparison to those used for the assessments based on linear elastic analyses. The uncertainty in quantifying the behavior of these systems and the strong dependence of the behavior on the ground motion play an important role. The purpose of the study is to quantify the damage l...

Citation Formats

T. Daghestani, M. Çalamak, and A. M. Yanmaz, “On the Optimum Layout of a Drainage Gallery in Concrete Gravity Dams on Isotropic Foundation,” ENVIRONMENTAL & ENGINEERING GEOSCIENCE, pp. 345–358, 2019, Accessed: 00, 2020. [Online]. Available: https://hdl.handle.net/11511/33065.