ANALISIS PONDASI BORED PILE DENGAN PRINSIP PROBABILITAS (STUDY KASUS PROYEK HOTEL QUEST SOLO)
Abstract: Probabilistic design
began more realistic solution compare to the deterministic (conventional)
design as it can describe and accommodate of soil variability. Althought the old approach is widely used, it
is confirmed, that almost all natural soils are spatially variable in their
properties and rarely homogenous. This
paper focuses on the analysis and design of bored pile foundation on the
project of Solo Quest Hotel based on the
probabilistic theory. The research
begins with a certain pre-liminary analysis to prepare the probabilistic
analysis of bored pile foundatiaon design, by characterizing the cohesion (cu)
from convertion of N value on three SPTs data taken from the site. It involves an extensive analysis to perform
the best-fit distribution of pointwise variability of cohesion (cu) using
computer program written in MATLAB. The
next step is deriving the point statistics (i.e. mean, standard deviation, and
coefficient of variation) across the site.
Finally, a certain monte carlo analysis using Crystal Ball computer
program is carried out to design the bored pile foundation by inputing all data
taken from MATLAB analysis. The bored
pile installed in 12 m depth and the diameters of bored pile 0,6 m
respectively. The bored pile experiences 43.354,455 kN vertical
load. The results show that there is no
objection to hypothesis of normality in the Chi-Square analysis. Compare to the deterministic analysis, the
probabilistic design needs more bored pile to resist the vertical load in a
safety factor 2,5 and confident limit 95%.
Furtheremore, the higher variation of
cu data the larger number of bored pile is desired.
Penulis: Agus Susanto, Anto
Budi Listyawan, Dewi Puspitasari
Kode Jurnal: jptsipildd150746
