walled cities within a walled city:
BAU147 Xi’an High-Tech Precinct CBD

Xi’an City, Shanxi Province, China

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Discipline

Planning

Typology

Urban Planning

City

Xi’an City, Shanxi Province, China

Date

2002

Status

Invited International Competition

Client

Xi’an National High Technology Industrial Development Bureau

Program

Central Activities District (CAD)

China’s 20th century was an extraordinarily dense period of transformation: from imperialism to capitalism via communism, all within 100 years. Many aspects of life were simultaneously subjected to influences of each of these paradigms. However, the planning of new CBDs (central business districts) in China primarily reflects only the capitalist doctrines. These CBDs are mono-functional districts of sensational corporate office skyscrapers; scant regard is paid to social space, public institutions, history or context. Can positive aspects of the other ideologies be given formal and programmatic manifestations in the new city, in order to reflect the true complexity of contemporary China? Can the imperial era’s characteristics of certainty, permanence and clarity have a place in the age of curtain walls and fluid capital? Can a city’s urban design embody the CCP’s socialist tenets of liberty, fraternity and equality?

The legacies of the morphology of the ancient city of Xi’an are visible in the city centre: gridded streets, symbolic towers on axis and a massive perimeter wall. Our proposal takes the form of an array of eight super-blocks, each further divided into nine smaller blocks, with a void as their centre. Surrounding the entire CBD is another void in the form of a rectilinear loop park. Like the city wall this void stabilises the city form. As the CBD grows, its massive form emerges resulting in a landscape-scale rectilinear body. Development controls are used to achieve constant height perimeter around the super-blocks, creating walled cities within the walled city and further stabilising the city form. The figure-ground relationship of the central super-block is inverted to produce a symbolic government centre.

The eight voids at the centres of the superblocks are linked by a series of pedestrian axis. This arrangement serves to provide a network of public open space throughout the entire CBD area. By positioning specific programs along the three east-west axes of the public space network we propose a spatial expression of liberty, fraternity and equality, a strategy inspired from Griffin and Mahoney’s Canberra. Respectively these programs include: cultural institutions and library; market places and leisure facilities; and the city’s civic offices.

Within this framework the property market is free to run its course. However, to avoid the monotony resulting from pure commercial zoning, a quantity of residential use is specified. The programs are organized into continuous networks and then distributed throughout the site, resulting in a variety of intensities of use and character throughout the CBD. To protect the market from itself, and to prevent the degradation of the public space network, a set of maximum building envelopes is provided. Primary public spaces are protected from overshadowing and the free market is protected from itself.

2015

Education

Hospitality

Mixed Use

Nanjing

Residential

Sports

2011

Jiangyin

Office

Retail

2005-2010

Shanghai

2000-2005

Melbourne

Public

Urban Design

Kyneton

Culture

Healthcare

Playgrounds

Public Landscapes

Urban Landscapes

Hotel

Suzhou

2014

Hangzhou

Structures & Pavillions

Wuxi

Planning

2013

2012

Fuding

Shaoxing

Chongqing

Kunshan

Office

Wuhan

Hotel

Healthcare

Cixi

Ningbo

Meishan

Canberra

Jingzhou

Private Landscapes

Chengdu

Hospitality

Culture

1990-2000

Xiamen

Residential

Hopetoun

Caofeidian

Huai’an

Xi'an

Xinyu

Mixed Use

Retail

Sports

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no longer but not only:
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microcosm:
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staggering:
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palimpsest:
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walled cities within a walled city:
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space-time conflict:
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