位于伦敦的设计工作室WallaceLiu将中国西南部城市重庆的一条长1 km、宽20 m的高速公路改造成一条开放共享的“宜居街道”。设计的核心是打破一般城市公路的单一、线性的构图特征，以非线性的、开放的公共空间尺度和格局取而代之。对城市、业主和设计师而言，项目提供了一个探索中国为促进快速发展而建的基础设施如何转化以培育新兴城市文化的机会。
项目基地所在的燕南大道区域是中国当代城市发展的典型边缘地带，随着城市的扩张而改变了其土地性质。随着开发商北大资源的介入，大道沿线的7个地块将承载大片的高密度住宅。这条道路将贯穿近20 000 m2的新开发的沿街商业，在服务新住宅区同时也要继续服务现存的几栋低保住宅。
London based design studio WallaceLiu have re-imagined a 20 m wide, 1 km long highway in the South Western Chinese city of Chongqing as a shared surface “livable street” by replacing the delineation and monolithic character of the highway with the language and scale of a public space. For the city, the client and ourselves the designers, the project provided an opportunity to explore how China’s infrastructure, built to facilitate rapid growth, can be post-rationalized to nurture an emerging urban culture.
The site represents the typical periphery of a modern Chinese city that has changed its land use as the city expands. The highway, Yannan Avenue, along which 7 large plots of land were purchased by the state-owned developer PKU Resource, will become the new route through nearly 20,000 msq of street retail and high-density residential compounds and adjacent to existing low-income social housing.
WallaceLiu won the project in 2014 through a competition with an initial idea that the safety issues created by the cliffs could be used to argue that the highway width in its entirety could be reduced to two lanes, to match the width at the pinch points. “By resolving these awkward accidental problems”, WallaceLiu argued, “we could change the whole space for the better”. The proposal included temporary solutions to trial the “downgrade” and its impact on traffic and pedestrian behaviour, then, through time, to complete the permanent new kerbs and pavement extensions as funding became available.
The shared surface, as a typology of public space, aims to remove the dominance of vehicles. It provides a blurred boundary between the actual road and its surrounding parks, plaza, compounds and other urban facilities. “We imagined the entire highway to be transformed into a walkable and playful place.”
The resolution of the idea was made through the paving of the highway with a new granite surface, the repaving of pedestrian areas with a similar material, the removal of pedestrian barriers and most signage including road markings and the introduction of a new type of kerbstone that was flush with highway and pavement. Through careful design of the new street levels we were able to retain the existing sub-base and drainage therefore significantly reducing the cost of the new work. Around the two cliffs special safety measures were introduced in the form of smoother turning circles and “cropped” granite setts that create a bump when driven over.
“Because the width of the carriageway could not be reduced, we had to engage with its scale through design to remove its visual dominance. We did this by enlarging the new landscape elements such as public benches and planters, the main path through the park and the width of pocket squares to radically alter the visual proportion and impression of the overall place as one walks down the street.”
The existing gingko trees were to be become part of the open park and offer shade alongside newly added mature trees to encourage people use the street in the extreme hot summer of Chongqing. We also designed a series of coloured canopies to help lift the generally grey tone of surrounding towers, framing and filtering views at significant stopping places in the street. They are made with hanging perspex panels mimicking coloured clouds over a pebble-grey coated steel structure to cast complex and vivid shadows on the ground.
Other key design elements include a set of off-site manufactured steel-timber furniture. This seating is designed to form a “wave” of sit-able and climbable decks that can be used for large or small gatherings and that encourage children to play on them. They also act as new psychological signals for traffic to slow down as they pass by.
Another design choice that was realised was our choice to plant wild flowers, perennials and shrubs. They are very rarely used in Chinese contemporary landscape design due to their deciduous nature. Our client was supportive of the approach and helped us find suppliers in Chengdu who we then worked with to understand their available stock and begin to apply these in complex compositions across the site.
The project started on site summer 2015 and the whole middle section and part of the northern and southern sections were completed in summer 2017，and overall completion is scheduled in 2018. The most significant design decision was to place an emphasis on the build quality and user experience of the public space rather than to create a symbolic, object and pattern based landscape. The street has now reopened and has been rebranded as the New Kowloon district.
设计公司：WallaceLiu 设计事务所 （地缘营造）
Design Company: Studio WallaceLiu
Location: Chongqing, China
Client: PKU Resource Chongqing office
Program: Public space
Design team: Jee Liu, Jamie Wallace, Manshu Cui, Summer Xu
Photography: Studio WallaceLiu
Translator: QIAN Leixi
Proofreader: SUN Yue
Editor: ZU Xiaoya