HIGH RISE BUILDING CASE STUDY SUSHMA RAGI FOURTH YEAR 'A' 41 Marina BaySands ARCHITECT: MOSHE SAFDIE Landscape Architect:Peter Walker & Partners, Peridian International, Inc. BUILT IN: 2006-2010 LOCATION: SINGAPORE Height:195 mts Floors:57 INTRODUCTION Marina Bay Sands is a complex of high density, mixed use, the construction reached $ 5.7 billion. Designed by architect Moshe Safdie for Las Vegas Sands Corporation, its facilities offering a surface of 845.000m2 stand on the boardwalk of Singapore, creating a gateway to the city and providing a dynamic environment for vibrant public life site. Safdie was invited to join Las Vegas Sands Corporation for the development of a competitive project design and present it to the Government of Singapore. The project has been awarded CTBUH 2010 Best Tall Building Awards, Finalist Asia and Australasia Region. DESIGN CONCEPT CONCEPTUALLY, EACH TOWER IS COMPOSED OF TWO SLABS OF EAST AND WEST-FACING ROOMS. THE DOUBLE-LOADED TOWERS SPREAD AT THE BASE FORMING A GIANT ATRIUM AT THE LOWER LEVELS, AND CONVERGE AS THEY RISE (SEE FIGURE 2). THE TOWER SLABS ALSO GIVE FURTHER CHARACTER TO THE MASSING AND RELATE TO THE SITE CONTEXT: THE GLAZED WEST SIDE FACES THE CITY CENTER WHILE THE EAST SIDE IS PLANTED WITH LUSH BOUGAINVILLEAS FACING THE BOTANICAL GARDENS AND OCEAN BEYOND. IN PLAN, AS THE PARCEL VARIES IN WIDTH, THE CROSS SECTION IS DECREASED FROM ONE TOWER TO THE NEXT. THE THREE VOID SPACES ARE CONNECTED BY ONE CONTINUOUS AND CONDITIONED GLAZED ATRIUM, FILLING. THE SPACE BETWEEN THE TOWERS WITH RESTAURANTS, RETAIL SPACES, AND A PUBLIC THOROUGHFARE. EACH TOWER SLAB FORM IS ALSO TWISTED SLIGHTLY IN RELATION TO ITS PAIR, CREATING A DANCE-LIKE RELATIONSHIP BETWEEN THE TWO PARTS AND ACCENTUATING THE SLENDERNESS OF THE BUILDINGS, RESULTING IN THE APPEARANCE OF SIX TOWERS, RATHER THAN THREE Urban Structure Safdie designed an urban structure that weaves together the components of a complex program with a dynamic urban crossing roads and public meeting place. Inspired by the great ancient cities that are arranged around a major thoroughfare, Marina Bay Sands is organized around two main themes running through the neighborhood and give a sense of direction, placing greater emphasis on the pedestrian street, as the center of civic life. HOTEL LOBBY DIAGRAM OF HOTEL COMPONENTS CONSTRUCTION PROGRAM HOTEL: 2560 LUXURIOUS ROOMS IN THREE TOWERS, WITH A TOTAL OF 265.683M2 SANDS SKYPARK: THE THREE HOTEL TOWERS ARE CONNECTED AT THE TOP, AT 195 METERS HIGH BY A PARK OF 9.941M2 WHICH HOUSES A PUBLIC OBSERVATORY, JOGGING TRAILS, GARDENS, RESTAURANTS, LOUNGES AND AN INFINITY POOL. THIS TROPICAL OASIS OF 1.2 HECTARES IS LONGER THAN THE HEIGHT OF THE EIFFEL TOWER AND LARGE ENOUGH FOR FOUR JUMBOS TO PARK A380S. CASINO: THE CASINO “ATRIUM” HAS FOUR LEVELS OF PLAY AND ENTERTAINMENT IN A TOTAL SPACE OF 15,000 SQUARE METERS. ATRIUM CEILING HANGS A LAMP 7 TONS WITH 132,000 SWAROVSKI CRYSTALS AND 66,000 LEDS. SHOP OVER 74.322M2 OF RETAIL SPACE AND RESTAURANTS. SANDS EXPO AND CONVENTION CENTER: 121,000 M2 OF FLEXIBLE CONVENTION AND EXHIBITION SPACE, INCLUDING ONE OF THE LARGEST BALLROOMS IN ASIA WITH AN AREA OF 8,000 M2 AND A CAPACITY FOR 11,000 PEOPLE. ARTSCIENCE MUSEUM: 15,000 M2, OF WHICH 6,000 M2 CORRESPONDS TO A GALLERY, 3,000 POND LILIES WITH A PALM TREE 80 METERS, 62 METERS IN DIAMETER ON LEVEL AND 11 DEEP. THEATRES: 21,980 SQUARE METERS WITH A TOTAL COMBINED CAPACITY OF 4,000 SEATS CRYSTAL PAVILIONS: 5,914 SQUARE FEET HOUSING SHOPS AND NIGHTCLUBS, THE FIRST STEEL AND GLASS STRUCTURE BUILT IN MARINA BAY. PLAZA EVENT: 5,000 SQUARE METERS WITH CAPACITY FOR 10,000 PEOPLE IN EVENTS OF LOCAL AND INTERNATIONAL. Diagramatic phasing of erecting the SkyPark Construction Challenges Once the project was awarded, teams were on the ground immediately to begin the fast tracking of the construction. The first and most critical task was to secure the building footprint. The entire complex sits on 0.56 million square meters (6 million square feet) of reclaimed land – sand infill on deep soft marine clay deposits. Marina Bay is a former salt water estuary that is now a fresh water reserve. Prior to excavation, the site needed to be reinforced. In order to do this, 1.5 meter thick (5 feet) steel-reinforced concrete diaphragm walls (coffer dams of up to were extended 50 meters (164 feet) into the ground providing an enclosure for excavation. The key challenge of building the hotel towers was the construction of the partof the towers thatslope at an incline. Unsupported, they could buckleunder their own weight. The slopingleg induces an enormous external force ontothe structure, whichneeded to be addressed during construction. The structural engineer conceived of an approach to build large temporary struts of structural steel to prop up the slopingtowers as they rise Spaces Its facilities offer a hotel with 2,560 rooms, a convention center, shops, restaurants, theaters, museums and a casino. This new urban space integrates the waterfront boardwalk, some 74,000 square meters of small arches at various levels and the iconic ArtScience Museum on the promontory. Located along the network of public roads there are also two theaters with 4,000 seats between them, a casino, a convention center and exhibition of 9,000m2 and 5,000m2 a public square with a striking hydraulic adjustment, according to events. Combining internal and external spaces and providing a platform for a wide range of activities, this vibrant “cardo maximus” of the century, or large gallery, also connected with the metro and other means of transport. THE SKYPARK IN ADDITION TO THE 0.9 MILLION SQUARE METERS (9.6 MILLION SQUARE FEET) OF BUILT SPACE, THE PROJECT PROGRAM ALSO CALLED FOR THE DEVELOPMENT OF EXTENSIVE EXTERIOR GARDENS WITH SWIMMING POOLS, JOGGING PATHS, AND PUBLIC SPACES. AS ONE OF THE AIMS OF THE PROJECT HAD BEEN TO MINIMIZE THE HEIGHT OF THE PODIUM BUILDINGS, SEEKING TO REFERENCE SINGAPORE’S PASTORAL HILLS MORETHAN ITS URBAN CORE, THE PROBLEM EMERGED THAT THE COMPLEX PROGRAM LEFT NO VACANT LAND SUITABLE FOR THESE AMENITIES. CREATING GARDENS ON TOP OF THE ROOF OF THE CASINO AND THE CONVENTION CENTER WAS STUDIED, HOWEVER, THESE VAST SPACES LACKED VIEWS, OVERSHADOWED AND OVERPOWERED BY THE ADJACENT HOTEL TOWERS. THE IDEA EMERGED TO BRIDGE BETWEEN THE THREE TOWERS IN ORDER TO RECLAIMEXTERIOR GARDEN SPACE AND CREATE A 2.5-ACRE PARK IN THE SKY. CONCLUSION THE PRINCIPLE CHALLENGE FOR THE MARINA BAY SANDS PROJECT WAS THE COMBINATION OF COMPLEX DESIGN PARAMETERS MATCHED WITH A VERY FAST PROJECT SCHEDULE, FROM INITIAL SKETCHES TO SUBSTANTIAL COMPLETION WITHIN FOUR YEARS. THIS MEANT ARRANGING CLOSE AND INTENSIVE RELATIONSHIPS BETWEEN THE ENGINEERING, CONSTRUCTION MANAGEMENT AND DESIGN TEAMS ON SITE, SUCH THAT COORDINATED SOLUTIONS COULD BE QUICKLY NEGOTIATED AS THEY AROSE. THE SUCCESS OF THE PROJECT LIES IN THE FACT THAT THE INVENTIVENESS OF THE DESIGN (THE CONCEP- TION OF THE HOTELS AND THE SKYPARK) WAS MATCHED BY AN EQUALLY INVENTIVE AND NOVEL APPROACH DEVELOPED BY THE ENGINEERING AND CONSTRUCTION TEAMS