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All Journal Jurnal Rekayasa Journal of Engineering and Scientific Research (JESR)
Andius Dasaputra
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Civil Engineering, Building, Construction & Architecture Computer Science & IT Control & Systems Engineering Engineering Industrial & Manufacturing Engineering Other

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Model alat uji permeabilitas lapangan untuk jenis tanah lempung. Andius Dasaputra
Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol 16, No 1 (2012): Edisi April Tahun 2012
Publisher : UNIVERSITAS LAMPUNG

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Abstract

The amount of water flowing through a certain area can be represented by the coefficient ofpermeability. Coefficient of permeability value is obtained by conducting laboratory test such asfalling head permeameter (FHP) or constant head permeameter (CHP). The equipment developedin this research can be used for field permeability test directly on the soil. The result of the testshows that the equipment can be used to determine coefficient of field permeability for clay type ofsoil. Results of permeability test based on FHP shows a little difference from the data based on theequipment model. Test on the field from 8 point location around Faculty of Engineering, LampungUniversity show that coefficient of permeability for clay about 10-6 until 10-7 cm/sec. This showsthat the equipment performs well for determining coefficient of permeability for clay soil.
Investment Analysis of Heavy Equipments for Cut and Fill Work on Toll Road Construction Project : (Case Study: Trans Sumatra Toll Road Section 3, Bakauheni-Terbanggi Besar) Kustiani, Ika; Syahputra, Reyzanza Anandio; Dasaputra, Andius
Journal of Engineering and Scientific Research Vol. 7 No. 2 (2025)
Publisher : Faculty of Engineering, Universitas Lampung Jl. Soemantri Brojonegoro No.1 Bandar Lampung, Indonesia 35141

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/jesr.v7i2.256

Abstract

Toll roads are vital infrastructure; however, their construction requires significant capital expenditures. One significant cost component is the cost of heavy equipment. The investment schemes considered in this study are cash new purchase, leasing, and rental. The best investment decision requires engineering investment analysis, including the NPV, IRR, BCR, and PP methods. The estimated cost of owning heavy equipment with a cash scheme is Rp 46.06 billion, a leasing scheme is Rp 53.50 billion, and a rental scheme is Rp 66.66 billion. The operating cost for all schemes is the same, amounting to Rp 56.44 billion during the construction period. The financial analysis results show that the cash scheme is the best with an NPV of Rp 9,198 billion, an IRR of 10.39%, a BCR of 1.12, and a PP of 3,3 years. Sensitivity analysis to interest rate increases shows that the cash scheme is feasible up to a 10% interest rate.
Co-Authors Ika Kustiani Syahputra, Reyzanza Anandio