Post City Linz

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Post City Linz

Firm

Tp3 Architekten und Caramel Architekten

Type

Landscape + Planning › Masterplan

STATUS

Concept

SIZE

1,000,000 +

POST CITY – … this is how a City should be!“…

KEY STATEMENT

With the present design concept for the development of the former PostCity area the question is raised whether the prevailing model of urban development, exclusively can be solved by the implementation of "residential high-rise buildings".

Living in an urban environment with high density should not mean relying on qualities of a local neighbourhood, smaller streets and squares, a private courtyard or a terrace. With the present design concept created a high-density urban structure, which has all the attributes of an "urban openness and in its volumetric constellations the standard of a modern, sustainable urban neighbourhoods adapted to climate change. The result is a dense urban fabric and spatial relationships of streets, alleys, squares, and Staircases.

This proposal is called "city carpet - city mosaic", because here on different levels one and the same basic pattern (main feature) prevails: to create a central Courtyard arranged building structures. This pattern can be combined with the arrangement of a pixel landscape can be compared. Multiple pixels (components, building blocks, building blocks, block edges) form one unit, several block units form the construction field, which in total formulate a homogeneous urban carpet. This planar basic structure the generates own identities on the different city "spheres", interprets the
Block edge new, upgrading it and strengthening the compactness of the "New PostCity Area".

The urban quarter is based on the allocation of work, leisure, living and recreation in a clear allocation to the individual construction sites. Thus many small mosaic stones form a large whole that grows from the small parts and creates an overall picture formulated!

The aim of this design study is to provide a solution approach to the questions on the topic: "Mixed use, flexible capacities and a social, economic and sustainable Interplay of the most complex uses" in a densely developed urban quarter ...to reflect.

URBAN DEVELOPMENT CONCEPT

At the beginning, the aim of the urban figure was a fundamental densification at the edge, which has now, however, developed further in the further depth of the work, more strongly than a homogenous, mosaic-like urban carpet. - This strengthens the identity and allows a cross-site neighbourhood between the individual building plots within the urban quarter.

The design transforms the existing area into a lively urban quarter and creates a district with its own unmistakable identity and quality. Building plots of various sizes and locations are emerging, creating individual smaller quarters, each with its own recognisable character - an eventful urban space that meets human standards!

The urban development concept is based on a permeable, visual axes and orientation creating building structures. Differentiated green and square spaces, arcades, stepped Roof landscapes (silhouette) and small-scale structured building plots provide changing perspectives as well as a variety of possible uses, - the central town square functions as the living heart of the new district, which is accessible by foot and bicycle network of paths is connected to the surrounding area.

SPHERE MODEL

The new urban district bundles the active areas in sphere ZERO, but allows for the plane of the flowing free space (transition of the two spheres zero and ONE) and the "urban, small alleys" additionally attractive entrances and common rooms.

The model of the spheres mentioned in the award documents has a special meaning for the revitalisation of the urban quarter and through the flowing formulation as well as the interior of the block. Therefore we propose an "extended sphere ZERO", which mediates between the different levels and strengthens this idea:

• At the city or neighbourhood level, multi-layered cycle and footpath connections the PostCity area with the structure of the surrounding districts,
• on the sphere ZERO (city pedestal) robust entrances, identity, adescence and generous entrance lobbies,
• a flowing landscape washes around and leads to Sphere ONE its building structure of block-like building plots provides the basis for the creation of attractive urban quarters.

CITY MOSAIC - CITY CARPET

The design approach and its development was initially thought of from the margins.

However, in the project's deepening, the concentration of the development is further developed into a carpet-like distribution of building masses, which formulates a uniformly distributed density and adapts to the respective context and the differently distributed use, andmore detailed further thought!

The concept of the individual residential courtyards forms the basic framework and enables a variety of different building typologies. It is robust and at the same time open for later modifications,
without losing the basic idea of urban development.

ON THE TOPIC OLD TOWN

For the building development we propose a building type, which in its base has the scale and takes up the eaves of the founder-era city.
From the heterogeneity of the surroundings, a "new urban settlement" develops a specific identity for the new city district, SlowTown. A finely knit one, permeable fabric of squares, paths, open spaces and buildings of different scales, as a stable framework for the new city quarter.

BUILDING TYPOLOGY
In the choice of building types, the focus is on diversity: low townhouses meet urban block developments and line developments located at the edges. Just this A clash of metropolitan with village-like small-scale and eventful Open spaces will promote a diversity of housing and working arrangements.

The basis of this neutral typology is the characteristic, classic perimeter block development in the form of living and working clusters. These individual, compact structures are on the one hand a part of the common, flexible structure and on the other hand open for individual Adjustments. - A differentiated development with different types of buildings and exciting room edges.

The utilization of the maximum ecological density promotes the most important aspects, which functional mixing and a high ecological standard. The selective development forms structures, each of which, together with the associated open space, islands in the middle of the urban landscape. The spaces in between function as flexible empty spaces, which adapt to the use through various activities from private to public and (can be) defined and designed anew again and again.

... "To work on this concept means to deal with the typology of the urban house ...and develop it further."...

TOWN PLACE
In terms of urban development, the Freie Mitte will become the centre of the new district and a centre of attraction for the wider environment, interlinks with the footpaths and cycle paths of the surrounding districts and creates a delicate network of through-buildings, building joints and passages. Starting from these "lifelines" a delicate Network of movement flows, along which the individual structures are lined up.

The town square and the adjoining rooms on the ground floor form a living unit between inside and outside. The guiding principle of the free centre is a deliberately double between urban urban space and a gentle, informal but lively interpretation of the Space that can be played and appropriated flexibly. From this interaction of open space and building development, a new and unmistakable one finally emerges, but the PostCity area is woven into the city of Linz.

TRANSPORT

Based on the concept of Rosinak & Partner, the strategic consideration is only one entry and exit in the area of the Waldeggstraße, which means that the crossing point (exit Bahnhofsvorplatz) with the expected (feared) congestion zone, can be defused.

Due to the new A26, a reduction of about 12% of the traffic on the surface expected, - therefore an integration of the project-induced traffic via this one Filling point possible. With this consideration also unfavorable crossing points of the different access flows (station, etc...) can be avoided.

Due to the current development and the good connection with public transport, this develop a new city district into SlowTown! - We therefore propose that the number of parking spaces (approx. 2,500) will be significantly reduced. Basically, the fulfilment of the possible, but in the further planning process this topic will be addressed in the once again be discussed in greater detail.

Due to the compact development, additional roads inside the area can be largely dispensed with, as the construction sites are developed directly from the edge (delivery), in sphere ZERO. - This creates a maximum of connected open spaces for a dense network of footpaths and cycle paths with a high quality of stay and high permeability, designed as a uniform surface - the living room of the urban quarter.
A multimodal mobility centre with car sharing and Mobility Point will be offered in the area of the bus station. A ring road concept for delivery traffic will allow access and exit from only one side at a time to keep the central area of the district free of car traffic. The project guarantees a high-quality, purpose-oriented inner thoroughfare as well as networking with the surrounding districts. (Possible connections to Andreas- Hofer-Platz, Burgschlößlpark and Weingartshofstraße). This has positive effects on the existing environment, as any gaps in the city's network of paths are closed
or the separating effect of the motorway junction is mitigated.

The fire brigade access roads are guaranteed through and into the area. Rescue routes are provided by turntable ladders and a rescue height of 23m - fire brigade access route under 10Km. By not exceeding the escape level of 32m, the requirements for the increased scope of protection, e.g: safety staircases can be avoided.

OPEN SPACE CONCEPT

The heart of the open space is the urban centre in Sphere Zero, a large and versatile usable green space and square, from which all commercial areas and paths are well developed are. The site is completely infiltrated. Like all open spaces, it lies in sphere zero over grown soil. The rainwater is collected in retention basins, partly planted they also serve for informal play. Further playing possibilities are distributed around the square as well as seating, planting beds or wooden platforms.

A translucent canopy of leaves from Gleditsien and nymph trees (Nyssa) and various Paving with a strong green throughput gives a homogeneous green appearance. The course is designed for Fire brigade passable and the treadable green, may develop in the sense of a climate city, where the frequency of use is lower. Route relations
The routes between the bus station and the railway station are easily accessible via barrier-free, green ramps or stairways. The main cycle path leads across the extended Sphere Zero past meeting points and children's playgrounds, and from there it spreads out into the city.

Playgrounds
Towards the south, the urban centre develops in a more park-like manner, a children's and
Youth play area with grandstands is located at the entrance to the Beletage. The semi-public inner courtyards, which can be reached close to the apartments, offer a wide range of games. In total, the play areas are spread over the entire area and cover more than 6000m2.

Roofscapes
There are 7 different types of open space on the roofs. Three of them, the storage.., Evaporation and biodiversity roofs directly serve the climate goals. The others are Urban gardening, recreational, sports or play roofs for the use of residents Inside. All roof areas are accessible. Together they form a versatile open space system with different qualities of stay to feel good for everyone!

Privacy
Gardens connected to the apartments extend the private living space and complement the the varied range of loggias, balconies and terraces.

Multidimensionality of the free spaces: Multicoding
Coexistence of functions: Functional, aesthetic and ecological

The open spaces not only "only" make an aesthetic contribution to more quality of life and building culture in the urban quarter, but also exhibit a high degree of robustness and flexibility in relation to changing climatic conditions. The green space becomes a recreation room, in which Rainwater is retained and shady trees provide cooling. Emergency waterways channel heavy rainfall events into designed retention areas. The natural water balance becomes tangible and perceptible.

Watersensitive Urban development:
The water-sensitive urban development in PostCity is a climate adaptation strategy. It aims to optimize rainwater retention and provide water available for plants so that green spaces can effectively contribute to cooling during periods of severe drought and heat. Evaporation is the primary goal before infiltration and runoff.

Sponge City:
The maximisation of unsealed, absorbent surfaces in combination with deliberately applied planting - the sponge city principle - combines numerous functions. Rainwater retention and storage, shading, cooling, CO2 binding above and below ground, fine dust filtering, wind protection, transpiration cooling, evaporation of soil water.

Grey water utilisation:
Due to climate change, there are more and more long periods of drought and heat, during which rainwater becomes a scarce resource. In order to prevent an increased consumption of precious drinking water for irrigation of green areas, grey water is collected and treated in central plants. This pre-treated water is pumped onto planted storage roofs, which are located at the highest points of each construction site, and is thus available for irrigating the roof and facade gardens. On the roofs, "urban wetlands" with a high ecological and microclimatic function develop.

Albedo effect - energy conversion radiant energy:
Bright paved surfaces, water and vegetation areas reflect the radiation energy during the day. At night, open spaces that are deliberately kept open upwards help the neighbourhood to air out and cool down in summer.

Biodiversity - AAD animal aided design:
The high degree of greenery and the varied open spaces become diverse habitats for native flora and fauna. Areas of urban wilderness promote biological diversity and offer high potential as a nature experience space for users. Biodiversity roofs become habitats for insects and birds in the sense of the multicoding of open spaces.

Unsealed:
In total, over 7500m2 of the project area remain unsealed and open to seepage.

SUMMARY OBJECTIVES AND PRINCIPLES

• Creation of an urban district with a distinctive character
• Attractive urban design approaches with regard to identity, identification and Orientation
• Fulfilling central functions and urban networking
• Impulses and upgrading for adjacent surroundings
• Avoidance of anxiety dreams, revitalisation of public space
• Contemporary building structures
• permeability of the area, avoidance of barriers
• High quality living space even at higher density
• Well-known and proven building typologies, variedly staged
• Consistently high quality of use
• Provision of social infrastructure
• Consideration of urban networks
• High significance of ecological, holistic aspects and regenerative energy use
• Consideration of water as a protective good
• Sphere ZERO: City park, flowing landscape
• Sphere ONE: Green space, flowing landscape
• Development: block edge, city carpet
• Urban courtyards: residential garden, common rooms with community terraces
• Roof landscape: Garden landscape with greenery, Urban garden
• Optimal constructive grid and a compact envelope, compact development
• Escape levels below 22 m, all levels can be instructed
• Minimized development area, high efficiency in gross/net ratio
• Four elements of communal living: light - air - sun – nature
• versatile and adaptable floor plans
• private and generally accessible free areas through balconies / loggias

TEAM:

Tp3 Architekten ZT. GmbH
Hofberg 10/2, 4020 Linz, architekten@tp3.at, www.tp3.at

Caramel architekten zt-gesellschaft mbH
Türkenstraße 17/1, 1090 Wien, asp@caramel.at, www.caramel.at

Idealice, Landschaftsarchitektur
DI. Alice Größinger, Hasnerstraße 123/4.1.1, 1160 Wien, office@idealice.com, www.idealice.com

studio blaugruen, Landschaftsarchitektur
DI. Gregor Mader, Tummelplatz 5, 4020 Linz, office@studioblaugruen.com, www.studioblaugruen.com

Ing. Wolfgang Kögelberger, Bauphysik
Renning 41, 4204 Haibach/Mkr., wolfgang@koegelberger.at, www.koegelberger.at

Werkraum Ingenieure ZT. GmbH
Mariahilferstraße 121b/6, 1060 Wien, mail@werkraum.com, www.werkraum.com

BHM Ingenieure – Engineering & Consulting GmbH
Europaplatz 4, 4020 Linz, www.bhm-ing.com, officelbhm-ing.com