スイス・チューリッヒ市におけるGestaltungsplanを用いた都市空間デザイン手法の特徴

會澤 拓磨, 小澤 丈夫, 角 哲, 山縣 彩

doi:10.3130/aija.83.365

This paper aims to grasp the background of the formulation of Gestaltungsplan (hereafter GP) and its planning process by the city of Zurich, and to clarify the features of GP to be referred as a method of contemporary urban design. GP is one of the urban planning methods used for developing buildings and urban space since 1980 in Zurich, Switzerland and it is a comprehensive urban design method which regulates building volumes, arrangements, uses and infrastructures and so on. Currently in the city, the department named "Amt für Städtebau"(Urban Planning Bureau, hereafter AfS) is in charge of services such as management of urban design and planning. GP is formulated by AfS for effective utilization of land including regulations concerning on the three dimensional form of the building. Apart from GP, AfS operates the plan for the whole city called "Bau- und Zonenordnung" (hereafter BZO). BZO includes regulations that are the foundation for determining land use and architectural forms. With the GP being formulated, you can overwrite the contents of the BZO in the planning site and plan beyond the provisions of BZO individually. Since the city established GP in 1980, the city authority has run 83 cases throughout the city by May 2015, and the GP plays a major role in the urban development activities. In addition, the urban design method established by GP in Zurich city attracts attention as a superior system in which local governments, especially the city have great authority and operate. The authors came up with the following conclusions. When AfS started to operate the GP in Zurich city, there was a situation in which urban environment was worsening because of densification due to population increase in the city and reduction of construction space. We clarified that GP is a spatial planning method that decides comprehensively the three-dimensional arrangement of buildings, architectual form and scale and land use. We also clarified that GP is custom-made for each planning site. As a management system that enables such urban space design, we clarify the following three points in the planning process system. In the planning phase, the application of the landowner is the starting point of formulation of GP. As for the plan, AfS cooperates with landowners, designers and multi-disciplinary experts including construction and urban experts, and they establish agreements with each other. Finally, regarding the design, since the planning contents of GP has legal force, it determines the role of the designer, and it leads to the realization of excellent buildings. This system which executes planning and design by establishing agreements in order to achive a superior urban space in a feature of the GP management system. Buildings and urban spaces realisation based on GP are not only beneficial to the landowner but also they are successful in creating excellent urban landscapes and public interest. By GP, the city respects the context of existing cities and practices high-quality urban design coordinated by each department of the city. By referring to the concept of GP system, we can get useful knowledge in orienting towards the formation of excellent urban spaces.

スイス・チューリッヒ市における<i>Gestaltungsplan</i>を用いた都市空間デザイン手法の特徴

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