UJI KAPASITAS TARIK FONDASI TIANG APUNG PADA TANAH PASIR
ABSTRACT: A foundation
structure should be designed to detain uplift force in construction built to
detain rolling moment such as dock, water tower, and telecommunication tower.
This research was carried out to perceive the behaviour of tension capacity of
floating pillar on sandy soil and the comparison of ultimit capacity, shear
resistivity tension and soil stress
coefficient between the experiment result and theoritic calculation. The
research was done by building a model in laboratory using a pillar made of plexyglass with diameter d = 2,5 cm and length
variation of L = 15 cm ; 20 cm ; and 25 cm, and space s = 2,5 d ; 3d and 4 d
with single pillar configuration, 2 pillars, 3 pillars and 4 pillars
configuration. The research result showed that on single pillar, the average
tension capacity of pillar was 72,3% bigger than the result of calculation
using Poulos and Davis method, and 93% bigger than the result of calculation using Broms method. The vertival
displacement at the collapse point was 2,8% of pillar diameter ; shear
resistivity tension and soil stress coefficient
was 74,7% and 74,6% bigger than the result of
calculation using Poulos and Davis method, and 94,7% and 94,6% bigger
than calculation using Broms method. Whereas on pillar groups, ultimit tension
capacity pillar group was 55,7% bigger than the result of calculation using
Poulos and Davis method, and 86,2% bigger than the result of calculation using
Broms method. The average vertical displacement at the collapse point was 3,4%
of pillar diameter, average shear resistivity
tension and soil stress coefficient were
respectively 55,4% and 57,9% bigger than the result of calculation using
Poulos and Davis method, and 92,1% and 91,1% bigger than the result of calculation using Broms method.
Key words: tiang tunggal,
kelompok tiang, kapasitas tarik ultimit,
tahanan gesek satuan, koefisien tekanan
tanah
Penulis: Hadi Pangestu
Rihardjo
Kode Jurnal: jptsipildd060016
