综合公园空间布局优化的模型构建及实证分析  

Model Construction and Empirical Analysis for Spatial Layout Optimization of Comprehensive Parks

作　　者：刘志强[1] 丁吉逸 洪亘伟[1] 余慧[1] LIU Zhiqiang;DING Jiyi;HONG Genwei;YU Hui

机构地区：[1]苏州科技大学建筑与城市规划学院

出　　处：《南方建筑》2024年第1期88-95,共8页South Architecture

基　　金：国家自然科学基金资助项目(51778389):基于空间计量分析的中国市域建成区绿地率空间分异的格局、演变及其机理研究;“十四五”江苏省重点学科(风景园林学);江苏省企业研究生工作站(苏州园林设计院股份有限公司)。

摘　　要：综合公园作为重要且稀缺的城市公共资源,其合理布局对城市存量更新背景下优化公园体系、增进民生福祉具有重要意义。布局优化模型常用于解决公共服务设施布局问题,新重力P中值模型是一种综合多目标导向、设施供需匹配关系和复杂约束条件的布局优化方法。在辨析新重力P中值模型的基础上,综合考虑供给主体差异和模型求解难度,构建出面向城市综合公园布局优化的改进新重力P中值模型,主要修正内容如下:(1)通过细化供给主体,改良规模分配规则,改进新重力P中值模型未考虑现有公园和新建公园服务供给差异性的局限;(2)引入遗传算法寻优,解决非线性、多约束的复杂设施布局问题,实现模型求解以促进模型在公园实际规划中的推广应用。以苏州市中心城区为例,以多源数据为支撑,将研究尺度下沉至居住区尺度,实证结果表明模型优化后居民至邻近综合公园最大出行成本、平均出行成本和可达性基尼系数等指标均有改善,综合公园空间布局更为合理。研究结果可为综合公园布局规划提供有效决策工具,为公园绿地的精准化布局提供参考。China's urban construction has entered the stage of stock updating,refined planning,and management.Comprehensive parks are a scarce and important public resource.The reasonable layout of comprehensive parks helps optimize the park system and improve resident wellbeing.Presently,the spatial layout of comprehensive parks is mainly implemented based on per capita indicators and service radius,but the refined layout decisions lack quantitative support.The layout optimization model is often used to solve layout problems of public service facilities.Reasonable allocation of comprehensive park resources based on the layout optimization model is important to optimize the supply-demand of parks and promote scientific layout decision-making for comprehensive parks.The new gravity P-median model is a layout optimization method that integrates multi-objective orientation,facility supply-demand matching relations,and complicated constraints.It can meet practical needs of accurate spatial layout of comprehensive parks,but had the following limitations:(1)With respect to model construction,the new gravity P-median model ignores differences of supplying subjects and is difficult to adapt to differing scale requirements between existing facilities and new facilities during practical layout design.(2)With respect to the solving algorithm,as layout problems of comprehensive parks become increasingly complicated the model considers more comprehensive and refined factors of park layout,thus making it difficult to solve the new gravity P-median model.With comprehensive consideration of differences between supplying subjects and difficulties in model solving,an improved gravity P-median model for layout optimization of comprehensive parks was constructed.Major corrections were:(1)Refining the supply subjects and improving the scale distribution rules means the improved new gravity P-median model ignores limitations from the service supply differences between existing parks and new parks.(2)The genetic algorithm was introduced for optim

关 键 词：综合公园 空间布局 新重力P中值模型 遗传算法 苏州 

分 类 号：TU985.121[建筑科学—城市规划与设计]