On the Stability of Moderate Height Berm-Type Earthen Dams: The Hancagiz Dam Example

Çalamak, Melih; Kiliç, Yasin; Yanmaz, A. Melih

doi:10.1007/s10706-020-01286-6

Cited by 3 publications

(2 citation statements)

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“…The evaluation of the safety parameters of dams in a given design involves intensive computation and consideration of various uncertainties in the dam's site [3,4]. One of the most sensitive acts in the earth-fill dam, which is associated with many uncertainties and leads to different behaviors in the dam body, is the stability condition of the dam's slopes, which tend to slide under various hydraulic gradient changes, steady-state seepage, rapid fill, or rapid drawdown [5]. In these cases, providing safety interactions is very effective in preventing the slope instability's occurrence [6].…”

Section: Introductionmentioning

confidence: 99%

“…Fattah et al [26] evaluated the critical stability condition of an earth-fill dam's stability by using various analytical methods to prepare the safety variation charts during and beyond rapid drawdown. Calamak et al [5] used analytical procedures to investigate the safety status of the Hancagiz Dam in Turkey under steady-state, rapid-fill, and rapid drawdown conditions, which are reinforced by upstream berms. In this study, the authors used the various berms to obtain a high value for the dam's safety.…”

Section: Introductionmentioning

confidence: 99%

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Coupled Numerical and Analytical Stability Analysis Charts for an Earth-Fill Dam under Rapid Drawdown Conditions

et al. 2022

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The presented article provides a comprehensive study on the stability analysis of earth-fill dams under rapid drawdown and transient flow conditions used to prepare stability analysis charts by conducting coupled finite-element numerical and analytical limit equilibrium procedures. In this regard, the impacts of different rapid drawdown conditions on the safety factor of the Alavian earth-fill dam are determined. The slope stability charts present for both shallow and deep slip surfaces with various permeabilities are verified by ground information obtained with extensive instrumentation on the dam’s site. The results showed that by decreasing the permeability of the core’s material, despite preventing seepage, the instability risk of the upstream slope as a result of rapid drawdown intensifies. Also, as stability charts can be stated, with increasing the slip surface’s depth and decreasing the hydraulic hydration, the reliability decreases, and the sliding surfaces’ sensitivity increases based on the drawdown rates, which have been revealed to be from 0.2 to 0.6, the most critical state for safety factors, showing significant declines.

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