| 摘要: |
| 城市中心区的综合公园是提升周边社区生活品质的
关键场所，也是城市生态和文化基础设施的重要节点。步行可
达性对综合公园的日常使用至关重要，也是理解其潜在供需及
周边中小绿地级配合理性的途径之一。直观、尽量精确且顾及
尺度层级的步行范围评估有助于理解公园-社区可达性，并为
确定具体干预位置和策略提供参考。以石家庄市长安公园为
例，首先使用泰森多边形工具划分综合公园就近服务范围，然
后抓取范围内所有住宅建筑至综合公园入口的百度地图规划路
径，并根据不同距离阈值划分步行范围，发现综合公园周边的
社区之间存在显著的空间差异。研究结果表明：在距离长安公
园1 500m步行范围内，居民人口达14.28万人，占长安公园
就近服务范围居民总人口的65.7%；周边中小绿地可以补偿服
务4.58万人，但仍有2.88万居民位于合理的步行距离外。建
议结合微更新理念，增设或调整公园和小区入口等以扩大现有
综合公园的有效服务范围，在服务盲区内增建中小绿地以增加
受惠居民的数量。 |
| 关键词: 风景园林 步行路径 公园可达性 泰森多边形 步行范围 城市微更新 |
| DOI： |
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| 基金项目: |
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| Evaluating Pedestrian Accessibility and AdaptiveRetrofit for Comprehensive Parks and SurroundingCommunities: An Existing Stock Based CaseStudy of Chang'an Park in Shijiazhuang City |
| XU Zhen,WANG Jianhui,CHEN Yan,ZUO Yan |
| Abstract: |
| The comprehensive parks, particularly those near the city
center, play irreplaceable roles as vital nodes of the ecological and
cultural infrastructure, as well as an amenity for the surrounding
residents. Convenient walking to the park is crucial for their frequent
park visits, which provides a lens of understanding the potential
supply-demand and rationalizing the hierarchy of various-sized green
spaces nearby. In this study, an intuitive yet subjectively accurate,
multiple-scale bridging approach is proposed to delineate pedestrian
catchments, measure the park-community accessibility and specify
the intervention location and tactics. The approach was explored and
validated in a comprehensive park - Chang'an Park - in Shijiazhuang.
Thiessen polygons were used to estimate the nearby service area of
the comprehensive park as the first step. Subsequently, all residential
buildings within the area and the relevant walking routes to the
entrance of the comprehensive park were extracted from Baidu Maps
with Python coding. Then, pedestrian catchments were delineated at
different distance thresholds, revealing significant spatial disparities
in the park's surrounding communities. Within a 1,500m walking
distance from the park's entrances, the resident population reaches
142,800, accounting for 65.7% of that within the park's nearby
service area. In the same area, the surrounding small green spaces
can serve 45,800 people, yet there are still 28,800 residents located
beyond a reasonable walking distance. Therefore, the adaptive retrofit
by adding entrances of the park and communities at specific locations,
and building small green spaces in the areas lack green space, etc.,
is proposed. If implemented, these interventions would improve the
residents' access to the green space, as demonstrated by the scenarios. |
| Key words: landscape architecture walking route park accessibility Thiessen polygon pedestrian catchment urban adaptive retrofitting |
