中文摘要：

基于瑞典圆弧法和简化Bishop条分法分析土质边坡的稳定性，以圆弧滑裂面与边坡面的左右交点的两个横坐标和以滑裂面圆心的纵坐标作为优化变量，采用了一种改进的十进制遗传算法对优化变量进行优化。这种改进的遗传算法是以简单的十进制遗传算法为基础，结合优体克隆操作、子体优生操作和多代调环操作。通过计算ACADS考核题验证，该方法有较强的自适应能力，具有收敛速度快、解的精度高和避免出现早熟等优点。

英文摘要：

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.