Planning Model for Conserving of Environmental Stock of Green Space in Collective Housing Site in the Process of its Redevelopment

该研究项目的目的是建立一个在20世纪60年代东京都地区开发的集体住宅区的开放空间和绿化中产生的环境存量的保护模型。以下是该项目的成果。对日本住宅株式会社在东京都开发的16个地块的现有开放空间和绿化的环境存量现状及其自开始以来的改造情况进行了调查。通过调查树木和植物的生长与初始条件的比较，阐明了集体住房场地的开阔空间和绿地中产生环境存量的过程。此外，还调查了居民和开发商在住房重新开发和更新过程中的活动，以确定实现保护现有开放空间和绿化存量的关键条件。选定的四个地点Musashinomidoricho、Soukamatsubara、Tamadaira和Takanedai被指定为重建案例研究。通过对场地规划、建筑规划和景观规划的详细研究，得出现有开放空间的保护在很大程度上依赖于建筑体量的分配和内部交通的流通模式。在优先考虑保护现有休憩空间和绿化的情况下，提出了重建的替代模式计划。此外，还讨论了在现实中有待解决的一些问题，以及对近海地区的个案研究进行的持续研究，这些地区的住房习惯和生活方式显示出很大的差异。

The purpose of this research project is to build a conservation model of environmental stock generated in open space and greenery of the collective housing sites developed in Tokyo Metropolitan Area through 1960s. Followings are the results of the project.1. The present conditions of environmental stock in existing open space and greenery, and its transformation since the very beginning were surveyed for 16 sites developed by Japan Housing Corporation in Tokyo metropolitan area.2. The process through which environmental stock generated in open space and greenery of the collective housing site was clarified by surveying growth of trees and plants compared with the initial conditions. Also, activities of dwellers and developers in the process of redevelopment and renewal of the housing were investigated to identify critical conditions to achieve conservation of existing stock of open space and greenery.3. The selected four sites, Musashinomidoricho, Soukamatsubara, Tamadaira, and Takanedai were designated to the case study of redevelopment. Detailed study of site plan, architectural plan, and landscape plan led to the conclusion that conservation of existing open space heavily depends upon allocation of architectural volume and pattern of circulation of inner traffic.4. Alternative model plans for redevelopment were proposed in the case that conservation of existing stock of open space and greenery is given higher priority. Also some issues to be dissolved in reality were discussed as well as continuing research in case studies of Kinki area where habits for housing and living style show considerable differences.