deep basement

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INTERNATIONAL FINANCIAL CENTRE , HONG KONG BUILDING CONSTRUCTION- DEEP BASEMENT

Transcript of deep basement

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INTERNATIONAL FINANCIALCENTRE , HONG KONGBUILDING CONSTRUCTION- DEEP BASEMENT

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INTRODUCTIONSITE AREA: ABOUT 20000 SQ MGENERAL CHARACTERISTICS• LIKE TYPICAL HONG KONG THE SITE HAS DEPOSITION OF GRADE IIIGRANITE AND ALUVIUM AT THE HEIGHT OF -35 M • SILL AT THE HEIGHT OF -20M• 5-LEVEL BASEMENT CONSTRUCTED USING TOP-DOWN ARRANGEMENT• BASEMENT WORKS INVOLVED- PORTION UNDER THE MAIN TOWER- PORTIUM UNDER THE RETAIL PODIUM• A 71M DIAMETER COFFERDAM DOWN TO – 35M WAS CONSTRUCTED TO• FORM THE RAFT FOUNDATION FOR THE BUILDING CORE OF THE MAIN TOWER• PORTION UNDER THE RETAIL PODIUM WAS CONSTRUCTED USING TOP-DOWNAPPROACH

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PROCESS• INITIALLY THE 71M DIA COFFERDAM AND THE MEGA COLUMNS ALONG WITH THE CORE WALL

WERE CONSTRUCTED.• THEN THE CAR RAMP ON THE LEFT • FOLLOWING THE TOP DOWN METHOD THE GROUND FLOOR IS CREATED BY EXCAVATION AND

THEN ALSO A PIT CALLED DOUBLE BIT HELPS IN CARRYING THE SPOILS FROM THE EXCAVATION• THEN THE DIAPHRAGM WALLS ON THE SUBSEQUENT SIDES ARE BROUGHT DOWN TO ALLOW

ENTRY • THE SAME PROCESS IS REPEATED VERTICALLY AND HORIZONTALLY TO CREATE LEVELS BELOW• WHEN NEEDED THE EXPOSED STRUCTURAL ELEMENTS LIKE COLUMNS ARE THEN PRECASTED

FOR FURTHER PROTECTION AND STRENGTHENING

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THE USE OF A MATERIAL HOIST FOR THE REMOVAL OF SPOIL FROM THE BASEMENT INTERIOR

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MUCK OPENING PROVIDED ON THEGROUND SLAB FOR THE REMOVAL OF SPOIL

EXCAVATION INSIDE THE BASEMENT

CONSTRUCT THE BASEMENT IN A “DOUBLE BIT” MANNER

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FORMING THE BASEMENT SLAB AND ENCASING THE STANCHION TO FORM THE COLUMN

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THANK YOU

RIZVI COLLEGE OF ARCHITECTURE

HATIM MERCHANT 1232

SHAHKHIZER SHAMSI 1367

AHMED BATLIWALA 1306