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Showing 2 results for Earth Dam
Evaluation and modificationof chemical criterion for determining dispersive potential of clay

Volume 4, Issue 2 (5-2011)
Abstract
One of the main methods of determining dispersive potential of clay is chemical tests. These tests are found on the basis of sodium ion as a main chemical element in dispersive clay. The examinations show that there is no correlations between results of physical tests and chemical criterions. In present research after preparing the results of tests on 18 borrow pit sources of clay materials of earth dams, we investigate the Dr. Rahimi's criterion with results of Pinhole Test and then bases on pinhole test results, we suggested the modified criterion of Dr. Rahimi's proposed general criterion. The results of investigations on the range of laboratory data shows that the correlations of Dr. Rahimi's proposed criterion with pinhole test is 63%, while this rate is 74% for our suggested modified criterion. Also it should be considered that Dr. Rahimi's criterion compiled according the results of 24 laboratory samples while suggested criterion in present research compiled according the results of 234 laboratory samples.
Effect of the Soil-Water Characteristic Curve (SWCC) parameters on the slope stability of an earth dam in steady state and rapid drawdown
Dr Seyed Ali Asghari Pari,
Volume 19, Issue 6 (12-2025)
Abstract
Various factors influence earth dams' stability and flow rate, including geometric characteristics, material permeability, and upstream water height. Understanding unsaturated soil behavior in earth dams is crucial, necessitating the application of unsaturated soil mechanics principles due to the complexities involved. This study investigates the effect of Soil-Water Characteristic Curve (SWCC) parameters on the slope stability of an earth dam under steady-state and rapid drawdown conditions. The findings reveal that SWCC parameters significantly influence water flow and slope stability. Additionally, considering unsaturated unit weight can improve slope stability under varying conditions.
 

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