Page - 738 - in Book of Full Papers - Symposium Hydro Engineering

script was developed with the programming language, Python. The script defines changes of different variables, and then generates calculations with these assumptions. The result of the stability calculation of each parameter is presented graphically, where the resulting FoS is plotted against the varying parameters for each dam height. Variation in the FoS are shown for both sliding and overturning. This paper only presents a sample of the results that have been produced. The method used, has proven to give a very powerful and flexible tool for estimating stability of all types of concrete dams with different variables. In total, the report has been based on approximately 7000 separate calculations with different variables. VARIABLES Assumptions of for the calculations are shown in the table below. “Initial values” are used to generate dam section as described in the next chapter. Table 1. Assumptions used for the computations Variable Initial value Min. value Max. value Step for calculations Comment Friction angle 40° 35° 60° 1° Water level (Hw) h h – 1 m h 0.01 m h = Dam height Self-weight (kN/m3): 22 21 24 0.1 Drainage constant (k)* 1.00 0.50 1.0 0.05 Changes in pore pressure defined by k and dx*. Drainage position (dx)* 0 0.1Hw 0.5Hw 0.1Hw * Both the drainage constant (k) and the drainage position (dx) was changed, - see figure below (i.e. 6 * 11 = 66 different calculations for each dam height) Fig. 1. Illustration of assumptions to generate pore pressure. 738