深基坑双排桩支护结构优化设计

建立了多设计准则，多约束条件的面向桩－土相互作用的双排桩支护结构优化设计模型，给出了模型与结构分析软件及优化算法软件相结合的优化设计方法。完成了高层建筑深基坑双排桩支护实例的优化设计，并分析了桩身刚度、桩的直径和前后排桩距对优化结果的影响，算例结果表明，本文提出的优化模型应用于双排桩支护结构设计将带来显著的经济效益。

Optimum Design for The Bracing Structure with Double-row Piles of Deep Foundation Pit

This paper presents an optimum design model for the bracing structure with double-row piles under multi-design rule and multi-constrained conditions considering the pile-soil interaction,then an optimum design process which uses the optimum model with structure analysis and algorithm software is completed.An example of the optimum design for the bracing structure with double-row piles of deep foundation pit is calculated and the effect of the pile diameter?Stiff and the distance between the double-row piles .The optimum calculation results of the example shows the optimum model could produce obvious economic results in the design for the bracing structure with double-row piles of deep foundation pit.