柔性边界视角下山地老旧住区边界空间更新研究——以重庆后堡社区为例

A Study on the Renewal Design of Old Residential Areas from the Perspective of Flexible Boundaries—A Case Study of Houbao Community in Chongqing

摘要: 在城市既有空间优化的背景下，山地老旧住区边界空间因地形高差、界面封闭与功能单一等问题，普遍面临交往活力不足与空间品质衰减的困境。本文以柔性边界理论为分析框架，以重庆后堡社区为案例，综合运用实地测绘、行为观察与访谈调研等方法，对社区边界空间进行类型识别与交往效应分析。研究表明，后堡社区边界空间可归纳为封闭型、渗透型、互动型、开放型与半封闭型五类，不同类型在空间渗透性、行为吸附能力与邻里交往承载效能方面存在显著差异。其中，空间渗透度是影响边界交往强度的关键因素，而在山地城市中，这一渗透度不仅体现为平面界面的通达性，更受竖向高差与台地关系的显著制约。基于此，本文从界面柔化、空间再利用、功能复合与设施提质四个方面提出差异化更新策略，以期为山地老旧住区边界空间更新提供可借鉴的理论依据与实践路径。

Abstract: In the context of optimizing existing urban space, boundary spaces in mountainous old residential areas often suffer from declining social vitality and spatial quality due to topographic elevation differences, closed interfaces, and functional monotony. Using flexible boundary theory as an analytical framework and taking Houbao Community in Chongqing as a case study, this research employs field surveys, behavioral observations, and interviews to identify typologies of community boundary spaces and analyze their effects on social interaction. The boundary spaces in Houbao Community are categorized into five types—closed, permeable, interactive, open, and semi-enclosed—each exhibiting significant differences in spatial permeability, capacity to attract activities, and effectiveness in supporting neighborhood interaction. Spatial permeability is identified as the key factor influencing the intensity of boundary interactions. In mountainous cities, this permeability is shaped not only by the accessibility of horizontal interfaces but also significantly constrained by vertical elevation differences and terraced topography. Based on these findings, the study proposes differentiated renewal strategies across four dimensions—interface softening, spatial reuse, functional diversification, and facility upgrading—to provide theoretical insights and practical pathways for renewing boundary spaces in mountainous old residential areas.