The method for determining the placement standards of oversized cohesionless coarse grained soil Coarse grained parallel genetic algorithm ( CGGA ) applies multi population to optimize the objective problem. 超径无粘性粗粒土填筑标准的确定方法提出了一种新型的粗粒度并行遗传算法(CGGA),该算法利用多个子种群基于不同的编码方式进行进化计算。