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All Journal Majalah Ilmiah Sultan Agung TEKNIK INFORMATIKA Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Pondasi JITEK (Jurnal Ilmiah Teknosains) Innovative: Journal Of Social Science Research
Abdul Rochim
Universitas Islam Sultan Agung
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Computer Science & IT Earth & Planetary Sciences Education Engineering Environmental Science Law, Crime, Criminology & Criminal Justice Mechanical Engineering Physics Public Health Social Sciences Transportation Veterinary Other

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Journal : Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil

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ANALISIS CONTRACT CHANGE ORDER PADA PELAKSANAAN PROYEK APARTEMEN ALTON SEMARANG Muhammad Abdul Khalim; Henny Pratiwi Adi; Abdul Rochim
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 26, No 2 (2021): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v26i2.3135

Abstract

A contract change order (CCO) is a job change activity in a construction project that is carried out during the work implementation period. This study aims to determine the factors that cause contract change orders, analyze the impact given if there is a contract change order and analyze what strategies must be done to resolve the occurrence of contract change orders in the implementation of the Alton Apartment building construction project located in the city of Semarang. The data collected in this study used a semi-structured interview method with competent sources in their field, while the sources for data collection were construction management consultants (MK), contractors & owners. The Strength, Weakness, Opportunity, Threats (SWOT) analysis method is used to determine the right strategy to deal with CCO activities. The conclusion of the study, CCO was caused by an imperfect design that resulted in the achievement of time and costs not being on target, the strategy was obtained by accelerating work, controlling each work and project cashflow and referring back to the wholesale contract that was mutually agreed upon in the event of a dispute.
STUDI METODE PERKUATAN LERENG MENGGUNAKAN GEOMAT, SHOTCRETE, DAN SOIL NAILING (Studi Kasus: Lereng Spillway Bendungan Sadarwana Paket II Subang) Sahal Priyono Putra; Abdul Rochim; Sumirin Sumirin
Wahana Teknik Sipil: Jurnal Pengembangan Teknik Sipil Vol 28, No 1 (2023): Wahana Teknik Sipil
Publisher : Politeknik Negeri Semarang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.32497/wahanats.v28i1.4562

Abstract

The landslide of the upper slope in the excavation work of the spillway SadawarnaDam Package II Subang occurred after rain, precisely at the STA location from0+500 to 0+520. The purpose of the study was to compare soil reinforcement on theprevious spillway slope using geomat and shotcrete with soil reinforcement usingsoil nailing. Based on soil data the spillway slope consists of two types of slopes, theupper slope consists of CL (BS:03) while the lower consists of ML (BS:04). Theshear strength parameters C and Phi of both slope soils are quite high. Using PlaxisV.21, Slope/W and Seep/W, with C and Phi the slopes were found to be stable.However, in reality there was a landslide on the upper slope. Therefore, backanalysis was performed by lowering the strength parameters of the top soil adjacentto the slope until the landslide was realized. The reinforcement used on the twoslopes was different, the upper slope used geomat while the lower slope usedshotcrete, then the geomat was changed to soil nailing. Two seasonal models wereapplied to all reinforcements. The results showed that the factor of safety valuesfrom the back analysis modeling in the wet season using geomat and shotcrete wereless than 1 (Unstable). However, reinforcement using soil nailing has a SafetyFactor higher than 1.5. Based on these results, soil nailing can be a solution tominimize landslides on the spillway slope.
Co-Authors Ardian Fachrurrozi Bambang Supriyadi Henny Pratiwi Adi Khoiriya Latifah, Khoiriya Muhammad Abdul Khalim Mulyadi Mulyadi Pratikso Pratikso Rachmat Mudiyono Sahal Priyono Putra Sholahudin, Farhan Sumirin Sumirin