| 某建筑基坑工程悬臂桩优化设计研究 |
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| 引用本文： | 邓先华,高振宇,周淼,徐光耀,汪彪.某建筑基坑工程悬臂桩优化设计研究[J].路基工程,2016,0(4):191-196. |
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| 作者姓名： | 邓先华 高振宇 周淼 徐光耀 汪彪 |
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| 作者单位： | 武汉市勘察设计有限公司, 武汉 430022 |
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| 摘 要： | 基坑工程悬臂桩桩身设计参数组合的计算是悬臂桩优化设计的重要内容，在所有满足要求的设计参数组合中，必定存在一组设计参数，使悬臂桩的造价最低，因此，获得这组设计参数对于悬臂桩的桩身设计具有十分显著的工程实用价值。基于粒子群算法本身所具有的特点，通过某建筑基坑工程实例，以单位宽度的基坑侧壁岩土体设置的悬臂桩的造价作为目标函数，对悬臂桩的桩径d、桩长l和桩中轴线间距b这三个关键设计参数进行迭代搜索计算，并通过MATLAB创建优化设计程序的计算界面，获得三个关键设计参数的组合。再计算优化前后的桩身内力和变形，并进行稳定性验算。结果表明:优化后的悬臂桩桩身内力和变形均能满足控制要求，且对基坑支护结构稳定安全更加有利，并能节省一定的工程造价。
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| 关 键 词： | 基坑工程 粒子群算法 悬臂桩 造价计算 优化设计 MATLAB |
| 收稿时间： | 2019-11-07 |
Study on Optimization Design of Cantilever Pile for Excavation Engineering of a Building |
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| Abstract: | Calculating design parameter set of cantilever pile for excavation engineering is important for the optimization design of the pile. Among all the satisfied parameter sets, there undoubtedly exists one set making the cost lowest; thus it is valuable in the engineering to get this set of parameter. This paper did this work in such manner that, on the basis of particle swarm optimization’s own features, the excavation engineering of the building was taken as an example to make an objective function of cost of cantilever piles arranged along rock-soil mass on the side wall of the foundation pit in unit width; next, with this function, iterative search and calculation was made on the pile diameter d, pile length l and pile axis spacing b, then through the calculation interface established by MATLAB for optimization design program, a set of the three key parameters was obtained; finally, the internal force and deformation of the pile body before optimization were calculated with stability checking. The result shows that the optimization herein allows the internal force and deformation of cantilever pile to meet the control requirement, is better for stability and safety of the foundation pit retaining structure, and may be an economic way for the engineering. |
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