APPLICATION OF IMPROVED DECIMAL STRINGS GENETIC ALGORITHM TO SEARCHING FOR THE MOST CRITICAL SLIP SURFACE OF SOIL SLOPE

This paper is based on Swedish circle method and Bishop Slices Method to analyze the stability of complete slope. The X coordinates of two points where the circular failure surface intersected the slope and the Y coordinate of the centre of circular are chosen to be the optimization variables. The variables are optimized with a kind of improved decimal strings genetic algorithm (IDSGA). On the basis of simple decimal strings genetic algorithm, the IDSGA with the best chromosome clone operation, younger generation chromosomes prepotency operation and multi-generations adjusting environment operation is put forward. It is shown from calculating ACADS test problems that the algorithm has several main functions such as better adaptive ability, expediting constringency, avoiding earliness, and improving precision.