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All Journal Justek : Jurnal Sains Dan Teknologi Eduvest - Journal of Universal Studies
Pratama, Herdian
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Aerospace Engineering Computer Science & IT Control & Systems Engineering Education Health Professions Mathematics Neuroscience Social Sciences

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Analysis of Ground Movement Using Geographic Information System Method in the Area of Kolok Mudik Village, Barangin District, Sawahlunto City Yanti, Syari Rahma; Putri, Fairus Atika Redanto; Burhamidar, Aulia Hidayat; Nauli, Fitri; Algifari, Arif; Pratama, Herdian
Justek : Jurnal Sains dan Teknologi Vol 8, No 1 (2025): Maret
Publisher : Unversitas Muhammadiyah Mataram

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31764/justek.v8i1.29250

Abstract

Abstract:  Kolok Mudik Village area has topography that varies between flat, undulating and hilly with a height above sea level.With this very varied height, it has quite steep slopes and has the potential for landslides. Apart from that, coal mining activities around the village make the land unstable. This research aims to map areas that are prone to land movement in Kolok Mudik village. The method used in this research is using a map overlay using the GeographicIinformation System (GIS) application. The parameters used in this model are soil type, rock type, land slope, geological formation, land use, and rainfall. In the mapping process, each parameter has a classification score which is multiplied by the weight of each parameter. Based on the results of data processing, the results show that the vulnerability of land movement in Kolok Mudik Village is in the medium to high categoryAbstrak: Wilayah Desa Kolok Mudik memiliki topografi yang bervariasi antara datar, bergelombang dan berbukit dengan ketinggian di atas permukaan laut. Dengan ketinggian yang sangat bervariasi tersebut, memiliki lereng yang cukup curam dan berpotensi terjadinya tanah longsor. Selain itu, aktivitas pertambangan batu bara sekitar desa membuat tanah menjadi tidak stabil. Penelitian ini bertujuan untuk memetakan wilayah yang rawan terjadi gerakan tanah di Desa Kolok Mudik. Metode yang digunakan dalam penelitian ini adalah menggunakan overlay peta dengan menggunakan aplikasi Sistem Informasi Geografis (SIG). Parameter yang digunakan dalam model ini adalah jenis tanah, jenis batuan, kemiringan lahan, formasi geologi, penggunaan lahan, dan curah hujan. Dalam proses pemetaan, setiap parameter memiliki skor klasifikasi yang dikalikan dengan bobot masing-masing parameter. Berdasarkan hasil pengolahan data, diperoleh hasil bahwa kerentanan gerakan tanah di Desa Kolok Mudik berada pada kategori sedang hingga tinggi.      
Implementation of Building Information Modeling (BIM) for Bridge Abutment Cost Estimation Considering QTO Validity Pratama, Herdian; Aminullah, Akhmad; Handayani , Tantri Nastiti
Eduvest - Journal of Universal Studies Vol. 5 No. 5 (2025): Eduvest - Journal of Universal Studies
Publisher : Green Publisher Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59188/eduvest.v5i5.51142

Abstract

This study investigates the application of Building Information Modeling (BIM) for cost estimation of bridge abutment structures, focusing on the validity of Quantity Take-Off (QTO). Poor QTO accuracy is a critical issue in construction projects, often leading to discrepancies in material estimates and cost overruns. This research aims to compare the conventional QTO methods with BIM-based QTO for the X bridge abutment structure, focusing on the accuracy of material quantities such as concrete and steel reinforcement. The methodology uses Autodesk Revit for 3D BIM modeling, clash detection with Autodesk Navisworks Manage, and QTO accuracy evaluation through the Mean Absolute Percentage Error (MAPE). The findings show that BIM-based QTO produces more accurate results, with deviations of 7.73% for sand and concrete, and 9.39% for reinforcement steel compared to conventional methods. These results highlight BIM’s potential to improve cost estimation accuracy in infrastructure projects, reducing the risk of underpayments or overpayments. The research implications suggest that BIM adoption could enhance efficiency and accuracy in Indonesian construction projects, offering significant benefits for cost management and project execution. This study contributes to understanding BIM's role in bridge construction cost estimation and emphasizes its practical advantages over traditional methods.
Co-Authors Algifari, Arif Aminullah, Akhmad Burhamidar, Aulia Hidayat Fitri Nauli Handayani , Tantri Nastiti Putri, Fairus Atika Redanto Syari Rahma Yanti