Internationaler Hochhaus Preis 2020

Construction of Leeza Soho, a 46-storey (207m) mixed-use tower with the world's tallest atrium, has reached level 20.

Within the Lize Financial Business District - a new business, residential and transport hub adjacent to Financial Road in southwest Beijing - Leeza Soho is located at the intersection of Lines 14 and 16 currently under-construction for the Beijing Subway rail network. Directly above the new interchange station, Leeza Soho connects with the city's bus network on Lize Road to the north and Lou Tuo Wan East Road to the east.

Anchoring the financial district, the 172,800m² Leeza Soho design has evolved from its specific site conditions. Straddling the new subway tunnel that diagonally divides the site, the tower rises as a single volume divided into two halves on either side of the tunnel. A central atrium - the world’s tallest - extends 190m through full height of the building, connecting the two halves together.

As the tower rises, the diagonal axis through the site defined by the subway tunnel is re-aligned by ‘twisting’ the atrium through 45 degrees to orientate the atrium’s higher floors with the east-west axis of Lize Road, one of west Beijing’s primary avenues.

Connecting with the interchange station below, this 190m atrium will be a new public space for the city.

An outdoor, public piazza surrounds the tower, echoing its circular form at the centre of the new financial district and welcoming visitors inside.

The atrium’s ‘twist’ allows natural light and views of the city from the centre of all floors of Leeza Soho. Sky bridges on structural rings at each refuge/MEP level and a double-insulated glass façade unite the two halves of the tower together within a single cohesive envelope.

The double-insulated, unitised glass curtain-wall system steps the glazing units on each floor at an angle, allowing ventilating registers to draw outside air through an operable cavity when required; creating extremely efficient environmental control for each floor.

The tower provides self-shading for the atrium’s public space below while double-insulated low-e glazing (U=2.0W/m²K; SC=0.4) and envelope insulation (U=0.55 W/m²K) maintain a comfortable indoor environment in Beijing’s extreme weather conditions.

At the forefront of 3D Building Information Modelling (BIM) in design, construction management and building operations, Zaha Hadid Architects and Soho China have implemented proven technologies to significantly reduce the energy consumption and emissions of their previous project collaborations.

Targeting LEED Gold certification, an advanced 3D BIM energy management system will monitor real-time environmental control and energy efficiency within Leeza Soho, integrating heat-recovery from exhaust air, high-efficiency pumps and fans, chillers and boilers, lighting and controls, in addition to water-collection, low-flow rate fixtures, grey water flushing and landscape irrigation.

Low VOC materials will be installed throughout Leeza Soho to minimise interior pollutants, and when required, high-efficiency filters will remove PM2.5 particles via the air-handling system.

2,680 bicycle parking spaces with lockers and shower facilities are provided. Dedicated charging spaces for electric/hybrid cars are located below ground.

Construction of Leeza Soho will reach its full 207m height in September this year, with the tower’s completion planned for late 2018.

Leeza Soho is the most recent of four project collaborations between Zaha Hadid Architects and Soho China that total 15 million square feet (1.4 million m²) of award-winning office and retail space.

Zhang Xin, CEO of Soho China explained: “China attracts the best talent from around the world. It’s important to work with architects who understand what the next generation requires; connecting communities and traditions with new technologies and innovations to embrace the future.”

Der 45 Stockwerke hohe Turm Leeza SOHO bietet flexible Büroflächen für kleine und mittlere Unternehmen und ist Zentrum des neuen Fengtai-Geschäftsviertel, eines wachsenden Finanz- und Mobilitätszentrums unweit des kürzlich eröffneten Beijing Daxing International Airport im Südwesten Beijings. Aufgrund der Nähe zum lokalen Bahnhof ist der Turm zum einen optimal an das Nahverkehrsnetz der Stadt angeschlossen, zum anderen verläuft direkt unter dem Turm eine U-Bahn-Strecke, welche ihn im vierten Untergeschoss diagonal teilt. Dies beeinflusste das Design des Leeza Soho Turms nachhaltig und ist der Grund dafür, dass das Volumen des Hochhauses in zwei Hälften geteilt ist. Jede der beiden Hälften hat einen eigenen strukturellen Kern mit außenliegenden Stützen und stählernem Zugring, der der gekurvten Außenstruktur des Turms folgt. Das 194,15 Meter hohe Atrium des Leeza SOHO ist das höchste der Welt und dient als öffentlicher Raum für das Viertel. Dynamisch um 45 Grad rotierend teilt es das Gebäude auf ganzer Höhe in zwei Bereiche, die über Brücken miteinander verbunden sind. Die skulpturale Teilung lässt natürliches Licht bis tief in das Gebäude hinein und bietet neben Ausblicken über die Stadt und ins Atrium auch den Vorteil eines thermischen Schornsteins, der das Raumklima zusätzlich reguliert. Die beiden Turmhälften verschatten durch ihre Drehung das Atrium und sorgen in Kombination mit der Doppelisolierverglasung mit niedrigem Emissionsgrad für ein angenehmes Innenklima.