The Effect of the Inclined Core of the Earth Fill Dam on the Settlement Rate

Since the constituent material of the earth fill dams are granular, they have little resistance to tensile stresses and are undergoing deformations as settlement. A large number of parameters affect the performance of dams. The aim of this paper is to evaluate the effect of the inclined core of earth fill dam as a parameter that is less regarded for the dam settlement rate. Therefore, considering the different angles for the core (60 degrees, 75 degrees, and 90 degrees), the dam settlement (Case Study: Sardasht dam) was investigated. In this study, numerical and statistical methods (fuzzy set) were used to analyze the results, first analyses were conducted by numerical modeling using PLAXIS software, and then a settlement criterion was obtained using existing techniques in statistics. Then, to obtain the considered relationship, the fuzzy linear regression model was used. Finally, after dynamic and static analysis with the mentioned methods, it was observed that with increasing core slope, the dam settlement decreases. The outcomes of fuzzy regression equations also confirm this issue.