The Effect of compressibility to Design Deep Foundation of behavior earthfill in Jakarta

PROCEEDINGS JOINT CONVENTION BALI 2007
The 32^nd HAGI, The 36^th IAGI, and The 29^th IATMI Annual Conference and Exhibition

The Effect of compressibility to Design Deep Foundation of behavior earthfill
in Jakarta

S. Rahman¹, H Pindratno², A. Assegaf¹

¹Majoring Geological Engineering USAKTI
²Department of Mining, DKI Jakarta

ABSTRACT

Geological condition of Northern Jakarta is dominated by alluvial deposits. These material have various enginnering properties which are distinguished by physical and mechanical properties. In orther to know the diversity of physical and mechanical properties in detail, engineering geology data will be needed, such as bearing capacity and settelment

Growing Activities development need support for the balancing environment. Based on the result of hand and machine boring indicate that earthfill in this area consist of the building material piece and house keeping material piece, which are depth range from 1 – 4 m at the surface area. earthfill in Kamal Dadap- Kamal Muara-Pluit area have thickness range from 1-2 m and more than 3 m. Ancol –Sunter –Tanjung Priok Harbor area have earthfill thickness range from 1-2 m, and Kelapa Gading-Kalibaru-Semper­Marunda have thickness more than 3 m. Settlement earthfill and natural soil can not be compared. Therefore, the nature land charatheristics indicate land settlement such as Ancol –Sunter area, which are earthfill not too thick.

Compressibility value in those area have certain distinction. Bearing compressibility in depth 5 m have compressibility between 0.48-0.875, that is middle to high land compressibility, in depth 8 m have compressibility between 0.37-0.692, that is middle to high, and in depth 27 m have compressibility between 0.23 – 0.73 that is small to middle land.

Key word : Environment balance , bearing , earthfill, compressibility value,

charatheristics land, settlement land, alluvial deposits, bearing capacity