基于改进遗传算法的长短桩复合地基优化设计

The optimal design of long-short-pile composite foundation based on improved genetic algorithm

摘要: 当前复合地基实践中出现了许多以优化为目的的新的生长点,长短桩复合地基作为一种新型的复合地基处理形式,其优化设计即在满足地基承载力和沉降变形的基础上实现最佳经济性的优化目标。本文采用改进的遗传算法,以长短桩桩体总费用为目标函数,全部约束条件均按相应规范要求给出,建立长短桩复合地基的优化设计数学模型,并编制了相应的计算程序。同时给出长短桩复合地基优化设计算例,计算结果表明,此算法能优化设计,降低工程造价,对工程设计有较强的参考价值。

Abstract: A series of new growth points appear recently in the engineering practice of composite foundation deign and construction from the angle of its optimization.As a new kind of composite foundation form,the optimization design of long-short-pile composite foundation is to realize the optimization goals of best economy.Applying the improved geneticalgorithm,the whole cost of long-short-pile is taken as an objective function.All the constraints are listed following the corresponding specification,a ma