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Indrastono Dwi Atmanto
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Engineering

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PONDASI TIANG PANCANG DAKTAIL Dwi Atmanto, Indrastono
TEKNIK Volume 34, Nomor 1, Tahun 2013
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (120.189 KB) | DOI: 10.14710/teknik.v34i1.4810

Abstract

The driven ductile iron pile is a simple and economical driven foundation system made from ductile iron pipes.The pipe material is centrifugally-cast ductile iron, which has excellent ductility, strength, and corrosionresistance properties. The material behavior and the manufacturing of the pipes in the plant are described.Questions concerning corrosion are treated. The internal and external bearing capacity is discussed as well asthe production of the piles on construction sites. Finally the range of application in practice is presented.
BEBERAPA ASPEK PELAKSANAAN 'UNDERPINNING' Dwi Atmanto, Indrastono
TEKNIK Volume 33, Nomor 1, Tahun 2012
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (323.073 KB) | DOI: 10.14710/teknik.v33i1.3788

Abstract

In areas of dense buildings often found limitations of the land, resulting in the possibility that new buildingfoundation coincides or lies below the existing foundation and excavation leads to instability of the existingfoundation. Similar problem also encountered in the construction of underground infrastructure and old buildingrestoration where the existing foundation must be strengthened. A row of bored pile or diaphragm wall arecommonly used for securing of excavation. Alternatively it is more economical to do underpinning by means ofgrouting, soil nailing and micropile, in which each method has its own advantages and disadvantages. Thesystem of underpinning provides advantages over the diaphragm wall and bored pile because it can support theload directly and saves space. This paper aims to introduce the principles of design, implementation, anticipatedactions and legal aspects of underpinning.
BAHAYA TEKUK PONDASI TIANG LANGSING DALAM TANAH LUNAK KOHESIF Dwi Atmanto, Indrastono
TEKNIK Volume 32, Nomor 3, Tahun 2011
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (182.418 KB) | DOI: 10.14710/teknik.v32i3.1738

Abstract

This paper treats the buckling of slender piles completely embedded in soft cohesive soils. Usually these soilswere assumed to behave elastically and were theoretically replaced by horizontal springs supporting the piles.However, soft soils deform as plastic materials. Therefore, it is suggested to assume a lateral supportindependent of the amount of the lateral displacement and accordingly to calculate a model; hereby the safetyagainst buckling of the piles is computed. It is shown that an ideally straight, centrally loaded pile does notbuckle until the stresses in the pile material exceed the elastic range. The shape of the pile axis, however, is mostimportant. Only a very little deviation from a straight line, because the pile is bent elastically or stressles, causesa rapid decrease of the maximum pile-load in dependency of the shear resistance of the soils with the increase ofthe deviation. The proposed model is also applied for eccentrically piles, i.e. a vertical load as well as a bendingmoment act on the pile top
PENGENALAN STABILISASI TANAH DENGAN JET GROUTING Dwi Atmanto, Indrastono
TEKNIK Volume 34, Nomor 2, Tahun 2013
Publisher : Diponegoro University

Show Abstract | Download Original | Original Source | Check in Google Scholar | Full PDF (263.233 KB) | DOI: 10.14710/teknik.v34i2.5628

Abstract

Due to restriction of land availability it is frequently we have to build constructions on soft or low bearingcapacity soils, so that soil stabilization must be applied in order to increase its properties. There are manytechniques of soil stabilization, where its applicability depends on many factors regarding appropriateengineering judgement. This paper presents the soil stabilization method by jet grouting, including its theory andpractice.
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