Teknik Sipil
http://hdl.handle.net/11617/7946
2024-02-25T05:03:49ZThe Probability Design of Pile Foundation (Design Pondasi Tiang dengan Prinsip Probabilitas)
http://hdl.handle.net/11617/10652
The Probability Design of Pile Foundation (Design Pondasi Tiang dengan Prinsip Probabilitas)
Listyawan, Anto Budi
Probabilistic design began more realistic solution compare to the conventional deterministic design as it
can describe and accommodate of soil variability. Although 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 pile foundation on the project of SMK Muhammadiyah
Sukoharjo based on the probabilistic theory. The research begins with a certain preliminery analysis to
prepare the probabilistic analysis of Pile Foundation design by characterizing the tip resistance on 3 CPTs
data taken from the site. It involves an extensive analysis to perform the best-fit distribution of pointwise
variability of tip resistance 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 pile
foundation by inputting all data taken from MATLAB analysis. The pile is installed in 10m depth with
the thickness of cap and the diameters of pile are 0.4m and 0.3m respectively. The pile experiences a 140
tones vertical load.The results show that, there is no objection to the hypothesis of normality in the chisquare
analysis, although the best fit distribution for each profile or 6 profiles which collected at once are
varying (i.e.normal, log-normal, gamma). Compare to the deterministic analysis, the probabilistic design
needs more pile to resist the vertical load in a safety factor of 2.5 and confident limit 95%. Furthermore,
the higher variation of CPT data the larger number of pile is desired.
2012-02-01T00:00:00ZPengaruh Siraman Air Pada Proses Pemadatan Terhadap Kinerja Campuran Asphalt Concrete
http://hdl.handle.net/11617/10240
Pengaruh Siraman Air Pada Proses Pemadatan Terhadap Kinerja Campuran Asphalt Concrete
Pamungkas, Rudi Septian Rahmat; Sunarjono, Sri; Sutanto, Muslich Hartadi; Harnaeni, Senja Rum
Realita di lapangan masih sering dijumpai proses pemadatan perkerasan campuran aspal tetap dilanjutkanmeskipun hujan turun. Paper ini melaporkan hasil penelitian untuk mengetahui karakteristik campuranAsphalt Concrete Wearing Course (AC-WC) dengan siraman air pada saat proses pemadatan untuk simulasiair hujan di lapangan. Pemadatan dilakukan dengan menggunakan alat pemadat roller slab (APRS) yangmemiliki sistem kerja pemadatan dengan cara digilas, dengan dimodifikasi tambahan alat simulasi air hujan.Variasi penyiraman air dilakukan selama 15, 30 dan 45 lintasan. Berdasar hasil pembahasan dapatdisimpulkan bahwa (1) penyiraman air menyebabkan nilai kepadatan campuran turun namun tidak sampaipada tingkat beresiko, (2) pengaruh air terhadap nilai volumetrik campuran ACWC sangat signifikanberbahaya dan menyebabkan nilai VITM dan VFWA tidak memenuhi syarat spesifikasi Bina Marga 2010,dan (3) sungguhpun penurunan nilai stabilitas dan kenaikan nilai flow akibat penyiraman air masih didalambatas aman menurut spesifikasi Bina Marga 2010, namun nilai MQ campuran sudah keluar dari batas amanspesifikasi.
2013-01-01T00:00:00ZFoamed Bitumen Structure
http://hdl.handle.net/11617/10239
Foamed Bitumen Structure
Sunarjono, Sri; Nyamadi, N
Foamed bitumen is a binder of cold mix asphalt, a road material alternative of the conventional hot mix
asphalt. Because of foamed bitumen properties are still not well defined, then the cold mix foamed asphalt
performance is not interpreted correctly. It causes any research to unlock the understanding of foamed
bitumen properties is necessary. This paper is therefore designed to open one of the important foamed
bitumen propertis aspect, i.e. its structure. The foamed bitumen structures are explored based on theoretical
study. It is studied in a general context, including foam behaviour, body structure, modulus, and rheology.
It is deduced from the results that foamed bitumen can be included within the general foam family. Foamed
bitumen composition, with both wet and dry foam formation, gives an indication that foamed bitumen
behaviour complies with expected general foam properties. It can be concluded some general properties that
are valid for general foam and which are also valid for characterising foamed bitumen. This includes foam
quality categories, structure, modulus, and rheology. Category of Foamed bitumen quality can be approached
by wet foam ranges between 52% and 87%, stable dry foam between 87% and 96%, and beyond 96% the dry
foam becomes unstable. This quality category is adapted from foam in the general context.
2013-01-01T00:00:00ZInitial Investigation on The Use of Oil Drill Waste Stabilized Foamed Bitumen As Pavement Materials
http://hdl.handle.net/11617/10238
Initial Investigation on The Use of Oil Drill Waste Stabilized Foamed Bitumen As Pavement Materials
Sunarjono, Sri
This paper provides an overview in the use of foamed bitumen to stabilize oil drill waste soil. In this investigation, an attempting has been conducted in order to evaluate the stiffness modulus of the stabilized soil. This was included the usage of limestone crushed aggregates, hydrated lime and Portland cement in order to see their effect on the mixture performance. The mix protocol and composition of the stabilized mixture have also been proposed to obtain the optimum performance. Oil drill waste can be stabilized using foamed bitumen. With considering their strength, this material can be used as pavement materials. The drill wastes contained clay and oils seem to prevent the mixtures from bonding as effectively to the foam as limestone crushed aggregates, it is suggested that the drill waste should be treated first by hydrated lime prior mixing with foam. To achieve a more effective coating between the foamed bitumen and the aggregate particles, it is suggested to mix the foamed bitumen only with the rock dust. The resultant mixture can then be stored for reasonable periods (sealed up to 3 months) before being mixed with drill waste, hydrated lime and, optionally, coarse aggregate and/or Portland cement.
2011-03-01T00:00:00Z