基于城市空间形态的可步行性定量研究——以成都市少城片区为例

Quantitative study on walkability based on urban spatial morphology:Taking Chengdu Shaocheng area as an example

步行作为一种低碳绿色的出行方式,在城市交通、环境、活力、健康等问题上起着重要的改善作用.本文选取成都市少城片区作为研究对象,定量分析了可步行性与城市空间形态之间的关系,将地块尺度、交叉口密度、道路密度、建筑平均高度与Form Syntax方法中的街道可达性、建筑密度、功能混合度结合作为城市空间形态指标,并运用步行指数方法计算了可步行性.结果显示,各指标对可步行性影响从大到小依次为:可达性、交叉口密度、道路密度、功能混合度、建筑密度、建筑平均高度、地块尺度,其中地块尺度和建筑平均高度呈负相关,其余呈正相关.研究指出提高可步行性可从城市空间形态指标的定量设计入手,为健康步行城市的建设提供了参考.

As a low-carbon and green travel mode,walking plays an important role in improving transportation,environment,vitality,and health of cities.This article selects the Shaocheng area of Chengdu as the research object,and quantitatively analyzes the relationship between walkability and urban spatial form.The plot size,intersection density,road density,building average height and street availability,building density,functional mix in Form Syntax constitute urban spatial form indicators.And walkability was calculated by using Walk Score.Result shows that the impact of various indicators on walkability in descending order is:accessibility,intersection density,road density,functional mix,building density,average building height,and plot size,of which plot size and building average height are negatively correlated,and the rest are positively correlated.The study indicates that improving walkability could start from the quantitative design of urban spatial morphological indicators,which provides a reference for the construction of a healthy walking city.