Page - 851 - in Book of Full Papers - Symposium Hydro Engineering

Performing the above-mentioned method, many variants have been studied. Based on the natural grading curves, about 10,000 probabilistic curves have been generated, each subsequently divided in two parts on the selected dividing sieve, e.g. #5, #12 or #25. Afterwards, each division has been mixed with various proportions (25%, 35%, 45% and 55% of the finer portion as shown in Fig. 4). The produced curves have been compared to the desired aggregate curves and the optimum values have been selected in the end. The optimum selection is elaborated as follows: The total aggregates are separated into fractions by sieve #16 (in other words, we separately have 0-12mm and 12-50mm) with a mixing proportion of 45- 55%. Fig. 4 The grading curves of aggregates for different proportions 3. CMDS FOUNDED ON WEAK ROCKS CMDs are more compatible with their foundations with respect to RCC and CVC gravity dams, which comes at the price of weaker foundations and hindering the estimation of proper and precise rock engineering parameters (shear strength and modulus of deformation), and also the type of the rock in the basement may varies in each location (Fig. 5 shows the rock lithology profiles in Dasht-e-Palang Dam). Fig. 5 Different rock properties along the longitudinal axis in Dasht-e-Palang dam 851