Post on 12-Jan-2017
INTERNATIONAL FINANCIALCENTRE , HONG KONGBUILDING CONSTRUCTION- DEEP BASEMENT
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
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
THE USE OF A MATERIAL HOIST FOR THE REMOVAL OF SPOIL FROM THE BASEMENT INTERIOR
MUCK OPENING PROVIDED ON THEGROUND SLAB FOR THE REMOVAL OF SPOIL
EXCAVATION INSIDE THE BASEMENT
CONSTRUCT THE BASEMENT IN A “DOUBLE BIT” MANNER
FORMING THE BASEMENT SLAB AND ENCASING THE STANCHION TO FORM THE COLUMN
THANK YOU
RIZVI COLLEGE OF ARCHITECTURE
HATIM MERCHANT 1232
SHAHKHIZER SHAMSI 1367
AHMED BATLIWALA 1306