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ANALISIS PERUBAHAN KADAR AIR DAN KUAT GESER TANAH GAMBUT LALOMBI AKIBAT PENGARUH TEMPERATUR DAN WAKTU PEMANASAN Nurdin, Sukiman
SMARTek Vol 9, No 2 (2011)
Publisher : SMARTek

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Abstract

Tanah gambut adalah tanah dengan karakteristik yang khusus, salah satunya adalah memilikikadar air yang cukup tinggi sampai 400%. Penelitian ini bertujuan untuk mengetahui karakteristiktanah gambut dan kuat geser pada tanah gambut desa Lalombi akibat pengaruh temperaturdan waktu pemanasan.Pemeriksaan fisik tanah gambut meliputi pemeriksaan uji kadar air asli dengan tingkatpemanasan dan waktu pemanasan yang berbeda, uji kadar abu dan organik, uji berat isi, ujibatas-batas Atterberg, uji berat jenis, uji penyerapan tanah dan uji kuat geser tanah dengan alatVane Shear Test.Proses pemanasan tanah gambut dengan temperatur dan waktu pemanasan yang berbedadapat mempengaruhi kadar air yang hilang dan kadar air yang tersisa di dalam rongga tanahgambut. Semakin tinggi temperatur dan lama waktu pemanasan, maka kadar air yang hilangsemakin besar. Kadar air maksimum yang hilang mencapai 125,682% dan kadar air yang tersisa didalam tanah gambut mencapai 0.231%. Nilai kuat geser tanah gambut desa Lalombi km. 65meningkat seiring bertambahnya suhu pemanasan dan lama waktu pemanasan, nilai kuat gesermaksimum tanah gambut adalah mencapai 38 kPa pada temperatur 100oC dan lama waktupemanasan 72 jam.
FINITE ELEMENT ANALYSIS OF REASONABLE FOUNDATION FOR SUPPORTING SILO’S TOWER Nurdin, Sukiman
SMARTek Vol 9, No 4 (2011)
Publisher : SMARTek

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Abstract

The limitation of soil data due to poor soil investigation process is a common problem in civil engineering project. The finite element method was used to analyse the compatibility of foundation to support silos in Liverpool Docks. Both shallow foundation and pile foundation were considered. The results of the analyses are presented by comparing analytical and numerical solution. Parametric study was considered for each case. There are different results for two types of shallow foundation that had been considered. Strip foundation seemed more reliable than pad foundation, while Pile foundation considered to be first choice due to the satisfactory condition for all factors.
Pengaruh Serat Alami Terhadap Tingkat Kepadatan dan Intensitaskeretakan Tanah Lunak Pada Siklus Basah Kering Nurdin, Sukiman; H. Ahmad, Sulaiman
JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR Vol 7, No 1 (2017)
Publisher : Jurusan Teknik Sipil Universitas Tadulako

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Abstract

The use of natural fibers as a reinforcement material in clay becomes an alternative choice of materials widely used in the early decades of soil improvement techniques. This practice is to improve soil strength and resistance to cracks. This preliminary practice was done because the cost of procurement is relatively low cost and also available in almost all areas of Indonesia. Modification of the use of natural fiber with other materials such as synthetic fiber materials has begun to do a lot at this time. The objectives of this research are: (1) Analyzing the physical and mechanical of soft soil mineralogy characteristics, (2) Analyzing the soft soil mechanical behavior by reinforcing  the Palm oil  fiber  (POF) of  the empty fruit bunch of palm oil whether it can increase soft soil capacity, (3) shrinkage and crack intensity factor (CIF) of soft soil in wet-dry cycles. The results showed that the addition of natural fiber on soft soil tends to reduce the level of soil density and increase the water content of the soil, although not too large. The effect is only about max 2.35% on 2% fiber content. While the swelling potential and shrinkageof the soils can be reduced by fiber reinforcement. In the crack potential test showed a substantial reduction of  crack intensity factor, whereas the addition of fibers in the soft soil can reduce cracks up to 444%. This shows that the fiber-soil has great ability in resisting the tensile strength of the soil-fiber interface due to the adhesion properties so that the soil is not easily cracked
Finite Element Analysis Of Reasonable Foundation For Supporting Silo’s Tower Nurdin, Sukiman
JOURNAL TEKNIK SIPIL DAN INFRASTRUKTUR Vol 2, No 1 (2012)
Publisher : Jurusan Teknik Sipil Universitas Tadulako

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (365.568 KB)

Abstract

The limitation of soil data due to poor soil investigation process is a common problem in civil engineering project. The finite element method was used to analyse the compatibility of foundation to support silos in Liverpool Docks. Both shallow foundation and pile foundation were considered. The results of the analyses are presented by comparing analytical and numerical solution. Parametric study was considered for each case. There are different results for two types of shallow foundation that had been considered. Strip foundation seemed more reliable than pad foundation, while Pile foundation considered to be first choice due to the satisfactory condition for all factors