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本文针对湿陷性黄土 ,结合有限元法探讨了柱列悬臂式支护桩设计方案的优化计算方法及其应用 .以桩距、桩径、桩身配筋、桩长为优化变量 ,以工程的主要材耗最低为目标函数 ,以满足支护功能要求的桩身强度、桩顶侧移以及设计变量取值界限为约束条件 ,用复合形调优法求解非线性约束的优化问题 ,对悬臂式深基坑支护桩方案进行了分析优化设计 ,并开发了可用于支护桩优化设计的应用程序 .最后 ,结合某实际工程的优化结果 ,分析了各优化变量对工程造价的内在影响 ,给出基于湿陷性黄土地区的优化设计方案 ,供设计参考使用
In this paper, the optimal calculation method and its application of cantilever support columns with column columns, pile diameter, pile reinforcement and pile length as optimization variables are discussed for the collapsible loess and the finite element method The minimum material consumption is the objective function. The pile strength, pile top displacement and design variables’ value constraints which satisfy the support function requirements are the constraints. The complex shape optimization method is used to solve the nonlinear constraint optimization problem. Type deep foundation pit supporting pile is analyzed and optimized, and an application that can be used to optimize the design of supporting piles is developed.Finally, combining the optimization results of a practical project, the inherent influence of each optimization variable on the project cost is analyzed, The optimal design scheme based on collapsible loess area is given for design reference