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All Journal Jurnal Ilmu Ekonomi, Pendidikan dan Teknik (IDENTIK) Innovative Research in Civil and Environmental Engineering (IRCEE) Jurnal Ilmu Teknik Sipil Indonesia (JITESNA)
Andrew Christover Harefa
Universitas Nias
Religion Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Economics, Econometrics & Finance Education Engineering Mechanical Engineering Transportation

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Perbandingan Kinerja Sistem Perkuatan Tanah Pada Penanganan Lereng Tidak Stabil Di Proyek Jalan Tol Bimawijaya Laia; Jun Fajar Krisman Giawa; Kevin Berkat Mendrofa; Andrew Christover Harefa; Laurensius Tema Berkati Jaya Gulo
Jurnal Ilmu Teknik Sipil Indonesia Vol. 1 No. 1 (2025): JITESNA - Juli
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/jitesna.v1i1.748

Abstract

This study presents a comparative analysis of the technical effectiveness and cost efficiency of three ground reinforcement methods—geogrids, soil nailing, and gabion retaining walls—for slope stabilization in highway construction projects. Numerical modeling using geotechnical software was conducted to evaluate the performance of each method based on the increase in the factor of safety (FS) and the degree of slope deformation. The results indicate that soil nailing is the most technically effective method, providing the highest FS increase (up to 1.68) and the best control over deformation. However, it also incurs the highest implementation cost. In contrast, geogrids proved to be the most cost-efficient solution, although with a more moderate FS increase. Meanwhile, gabion retaining walls offer a good compromise between performance and cost. The study concludes that the optimal choice of a ground reinforcement method must be based on a multi-criteria analysis that considers specific geotechnical conditions, safety priorities, and budget availability. The findings of this research are expected to serve as a practical guide for engineers in designing safe, efficient, and sustainable slope stabilization solutions.
Evaluation Of Soil Bearing Capacity Based On Cone Penetration Test (CPT) Results In Gunungsitoli City, Indonesia Bimawijaya Laia; Jefri Rahmat Daeli; Andrew Christover Harefa; Piter Telaumbanua; Kevin Berkat Mendrofa
Innovative Research in Civil and Environmental Engineering Vol. 3 No. 1 (2026): IRCEE - April
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/ircee.v3i1.1876

Abstract

Soil bearing capacity is a critical parameter in geotechnical engineering that determines the safety, stability, and performance of foundation systems. Accurate evaluation of bearing capacity is essential for selecting appropriate foundation types and preventing excessive settlement or structural failure. This study aims to evaluate the soil bearing capacity in Gunungsitoli City, Indonesia, based on Cone Penetration Test (CPT) results. A quantitative descriptive research approach was employed using in-situ CPT data collected from six representative investigation points. The analysis involved the interpretation of cone tip resistance (qc), sleeve friction (fs), friction ratio (Rf), soil stratification, and estimation of allowable bearing capacity through established empirical correlations. The results indicate that cone resistance generally increases with depth, reflecting a transition from soft clay and silty sand near the ground surface to dense sandy deposits at greater depths. The estimated allowable bearing capacity ranges from 320 kPa to 500 kPa, depending on local subsurface conditions. These values suggest that isolated footings are suitable for light to medium-rise structures, whereas raft or pile foundations are recommended for heavier infrastructure. Spatial variations in bearing capacity demonstrate the influence of local geological conditions, emphasizing the necessity of conducting site-specific geotechnical investigations before construction. Overall, the study confirms that the Cone Penetration Test provides a reliable, efficient, and economical method for evaluating soil bearing capacity and supports safer and more cost-effective foundation design for future infrastructure development in Gunungsitoli City.
Analisis Kepuasan Masyarakat Terhadap Sistem Drainase Anggerius Loi; Tafianus Hia; Andrew Christover Harefa; Serta Denius Daeli
Jurnal Ilmu Ekonomi, Pendidikan dan Teknik Vol. 3 No. 2 (2026): IDENTIK - Maret
Publisher : CV. SINAR HOWUHOWU

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.70134/identik.v3i2.1362

Abstract

This study aims to analyze the level of community satisfaction with the drainage system in Gunungsitoli and to identify the factors influencing it. The research employs a quantitative approach with a descriptive method by distributing questionnaires to residents living in areas affected by the drainage system. Satisfaction measurement is conducted using a Likert scale based on five service quality dimensions: tangible, reliability, responsiveness, assurance, and empathy. The collected data are analyzed using descriptive statistics and the Community Satisfaction Index (CSI). The results indicate that the level of community satisfaction with the drainage system in Gunungsitoli falls into the moderately satisfied category. The assurance and tangible dimensions obtain relatively higher scores, while the reliability dimension is the lowest. The main problems identified include insufficient drainage capacity, poorly maintained drainage conditions, and blockages caused by waste. In addition, community participation is found to significantly influence the performance of the drainage system. The study concludes that improving community satisfaction with the drainage system requires an integrated approach combining technical improvements and increased public awareness. The local government needs to conduct routine maintenance, enhance drainage capacity, and promote community education on environmental cleanliness. This research is expected to serve as a reference for policy-making in more effective and sustainable urban drainage management.
Co-Authors Anggerius Loi Bimawijaya Laia Jefri Rahmat Daeli Jun Fajar Krisman Giawa Kevin Berkat Mendrofa Laurensius Tema Berkati Jaya Gulo Piter Telaumbanua Serta Denius Daeli Tafianus Hia