CONCRETE MICROPILE AS A REPLACEMENT OF ULIN AND GALAM WOOD MICROPILE

Abstract

The dimensions of Iron Wood and Galam Wood micropile that available in market less
met requirement as pile foundation because very small dimension and very limited length
of pile module. Micropile foundation on small/light structure in future would be planned
with prestressed concrete micropile. Prototypes of micropile were produced in 2 size i.e.
10cm×10cm and 15cm×15cm. Realiability of micropile’s bearing capacity as floating
pile or full friction pile foundations were known with field loading test. The results were
compared with bearing capacity of Galam micropile. Increase of pile’s cross sectional
area and length of embedded module increased pile surface area and significantly
improved ultimate bearing capacity. Pile surface area increment of 1.16 – 1.74 times
raised ultimate bearing capacity to 1.84 – 3.24 times compared with Galam micropile.
Concrete micropile had better bearing capacity realibility than timber micropile.