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

本研究项目的目的是建立一个20世纪60年代在东京大都市区开发的集体住宅场地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。对日本住宅公司在东京都市圈开发的16个地块的现有开放空间和绿地的环境存量现状及其改造进行了调查。通过测量树木和植物的生长情况，与初始条件进行比较，明确了在开放空间和集体住宅场地的绿化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建和更新过程中的活动，以确定实现现有开放空间和绿化存量保护的关键条件。被选中的4个地点，武藏中町、Soukamatsubara、Tamadaira和Takanedai被指定为重新开发的案例研究。对场地规划、建筑规划和景观规划的详细研究得出结论，现有开放空间的保护在很大程度上取决于建筑体量的分配和内部交通的流通模式。在保育现有的休憩空间和绿化资源更为重要的情况下，提出了重建的备选模式计划。还讨论了现实中需要解决的一些问题，以及在住房习惯和生活方式存在相当大差异的近基地区的案例研究中继续进行的研究。

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.