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Borneo Engineering: Jurnal Teknik Sipil
Published by Universitas Borneo Tarakan
ISSN : 25811134     EISSN : 26857553     DOI : https://doi.org/10.35334/be.v9i3
Core Subject : Engineering,
Civil Engineering, Building, Construction & Architecture
Focus and Scope Borneo Engineering : Structural Engineering, Transportation Engineering, Water Resources, Geotechnical Engineering and Construction Management
Arjuna Subject : Teknik (semua kategori) - Teknik Sipil dan Struktur
Articles 244 Documents
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Faktor Yang Mempengaruhi Pemilihan Moda Transportasi Menuju Sekolah Di Kota Tarakan Muhammad Kurnia; Iif Ahmad Syarif; Edy Utomo
Borneo Engineering: Jurnal Teknik Sipil Volume 9 Nomor 3 Tahun 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v9i3.441

Abstract

Abstract Mode Choice of School Transportation is an important decision influenced by various socio-economic factors and travel characteristics. This study aims to analyze the factors influencing students’ choice of transportation modes to school in Tarakan City, North Kalimantan. Data were collected through a questionnaire survey of 250 student respondents using a purposive sampling method. The findings indicate that motorcycles are the dominant mode of transportation (89.3%) chosen by students. The most influential factors in mode choice are speed (67.9%), comfort (60.7%), and low cost (39.3%). The analysis also reveals that the majority of students (82.1%) do not possess a driver’s license, yet they still use motorcycles due to accessibility and flexibility. Willingness to switch to public transportation is low because of the limited availability and poor service quality of public transport in Tarakan City. This study recommends the development of a public transportation system that is comfortable, well-scheduled, and affordable to encourage behavioral change among students in their transportation choices. Keywords: transportation mode, students, mode choice, Tarakan City, motorcycle   Abstrak   Pemilihan moda transportasi menuju sekolah merupakan keputusan penting yang dipengaruhi oleh berbagai faktor sosial-ekonomi dan karakteristik perjalanan. Penelitian ini bertujuan untuk menganalisis faktor-faktor yang mempengaruhi pemilihan moda transportasi oleh pelajar menuju sekolah di Kota Tarakan, Kalimantan Utara. Data dikumpulkan melalui survei kuesioner kepada 250 responden pelajar dengan menggunakan metode purposive sampling. Hasil penelitian menunjukkan bahwa sepeda motor merupakan moda transportasi dominan (89,3%) yang dipilih oleh pelajar. Faktor-faktor yang paling berpengaruh dalam pemilihan moda adalah kecepatan (67,9%), kenyamanan (60,7%), dan biaya yang murah (39,3%). Analisis menunjukkan bahwa mayoritas pelajar (82,1%) tidak memiliki Surat Izin Mengemudi (SIM), namun tetap menggunakan sepeda motor karena kemudahan akses dan fleksibilitas. Kesediaan beralih ke transportasi umum rendah karena keterbatasan ketersediaan dan kualitas layanan angkutan umum di Kota Tarakan. Penelitian ini merekomendasikan perlunya pengembangan sistem transportasi umum yang nyaman, terjadwal, dan terjangkau untuk mendorong perubahan perilaku transportasi pelajar. Kata kunci: moda transportasi, pelajar, pemilihan moda, kota tarakan, sepeda motor
Optimasi Penempatan Tower Crane dengan Mempertimbangkan Beban Angkatan (Studi Kasus: Proyek High-Rise Building di Kota Surabaya) Hartono, Jessica Natalia; Kuanda, Harbert; Reynaldo, Ambrosius Matthew Junius; Sugiharto, Handoko
Borneo Engineering: Jurnal Teknik Sipil Volume 9 Nomor 3 Tahun 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v9i3.445

Abstract

Tower crane merupakan salah satu peralatan utama dalam proyek konstruksi gedung bertingkat yang berperan penting dalam distribusi material. Penempatan tower crane yang tidak optimal dapat menyebabkan penurunan produktivitas sehingga jadwal proyek terlambat. Penelitian ini bertujuan untuk menganalisis optimasi penempatan tower crane berdasarkan nilai konflik , keseimbangan beban kerja , durasi proyek, dan total biaya. Metode penelitian menggunakan pemodelan spasial dengan membagi area proyek ke dalam zona demand yang ditentukan berdasarkan kebutuhan material, kapasitas angkatan, serta elevasi lantai. Selanjutnya dilakukan iterasi perhitungan pada tiga skenario: (1) kondisi eksisting, (2) optimasi penempatan dengan tiga tower crane, dan (3) optimasi penempatan dengan dua tower crane. Hasil penelitian menunjukkan bahwa pada skenario 1 nilai konflik sebesar 141.236 dan keseimbangan beban kerja 603,18 menit dengan durasi proyek 165 hari. Pada skenario 2, konflik turun menjadi 42.706 dan keseimbangan beban kerja menjadi 417,09 menit dengan durasi 148 hari, tetapi ada peningkatan biaya. Sementara itu, skenario 3 menghasilkan nilai konflik nol, keseimbangan beban kerja 346,06 menit, dan biaya operasional lebih rendah dibanding skenario 1 maupun 2, meskipun durasi proyek lebih lama yaitu 169 hari. Dengan demikian, skenario 3 dapat dianggap sebagai solusi terbaik karena memberikan distribusi beban kerja yang lebih merata, eliminasi konflik, dan efisiensi biaya, meskipun memiliki durasi proyek yang sedikit lebih panjang.
Kinerja Durabilitas Mortar Ramah Lingkungan Berbasis Limbah Ultrafine Ampas Teh Fauzi Mahmuda, Ali; Okviyani, Nur; Apriansyah, Apriansyah
Borneo Engineering: Jurnal Teknik Sipil Volume 9 Nomor 3 Tahun 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v9i3.454

Abstract

Penelitian ini mengevaluasi pengaruh substitusi ultrafine ampas teh terhadap durabilitas mortar sebagai upaya reduksi jejak semen. Empat campuran disiapkan (0; 5; 7,5; 10% terhadap massa semen). Evaluasi dilakukan melalui uji daya serap air pada umur 28 dan 91 hari, half-cell potential pada 7, 28, dan 91 hari, serta kedalaman penetrasi ion pada 28 hari. Pada 91 hari, daya serap menunjukkan: kontrol 11,22%; 5% 11,03%; 7,5% 16,16%; 10% 17,14. Nilai HCP 91 hari menunjukkan pergeseran lebih positif: kontrol −12,5 mV (risiko rendah), 7,5% −52,7 mV dan 10% −64,1 mV (keduanya risiko rendah), sedangkan 5% ≈ −117,9 mV (sedang). Pada 28 hari, kedalaman penetrasi klorida berturut-turut: kontrol 39,349 mm; 5% 41,941 mm; 7,5% 45,840 mm; 10% 47,064 mm. Temuan ini mengindikasikan adanya batas optimum: 5% memberikan kinerja transport terbaik di antara campuran ampas teh (serapan dan klorida lebih rendah), sedangkan indikator elektrokimia lebih menguntungkan pada 7,5–10%. Secara praktis, rentang 5–7,5% dapat dipilih sesuai prioritas desain (pengendalian ingress klorida vs. penurunan peluang korosi), dengan pengendalian w/b dan curing yang memadai. Hasil mendukung kelayakan ampas teh ultrahalus sebagai material tambah berbasis limbah untuk mortar berketahanan tinggi.
Kinerja Mekanis Beton Ringan Menggunakan Serat Sabut Kelapa dan Agregat Batu Apung Okvianti Irlan, Ade; Liastary Pradina Febrianty; Muhammad Sofyan
Borneo Engineering: Jurnal Teknik Sipil Volume 9 Nomor 3 Tahun 2025
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v9i3.511

Abstract

Produksi beton ringan berbasis agregat pumice menawarkan pendekatan yang lebih berkelanjutan untuk mengurangi ketergantungan pada agregat alami sekaligus menurunkan berat struktur. Namun, pengurangan densitas sering diikuti oleh penurunan kinerja mekanis. Penelitian ini meninjau pengaruh substitusi pumice sebesar 20% sebagai agregat kasar dan penambahan serat sabut kelapa (0–2.0%) terhadap slump, densitas, kuat tekan, dan kuat tarik belah beton pada umur 28 hari. Substitusi pumice menurunkan slump dari 120 mm menjadi 100 mm dan mengurangi densitas sebesar 9–13%, sejalan dengan karakter pumice yang ringan dan berpori. Penambahan serat menurunkan kelecakan tetapi tetap dalam batas kerja beton struktural. Kuat tekan menurun dari 18,78 MPa menjadi 13,37 MPa akibat penggunaan pumice, namun meningkat kembali pada kadar serat 0,5% sebelum kembali menurun pada dosis lebih tinggi. Sebaliknya, kuat tarik belah meningkat stabil dari 1,22 MPa hingga 1,84 MPa, menunjukkan efektivitas mekanisme bridging serat dalam menahan retak. Analisis ANOVA menegaskan pengaruh signifikan variasi campuran terhadap kedua parameter mekanis. Evaluasi multikriteria menunjukkan bahwa PA20–F1.0 dan PA20–F1.5 memberikan performa paling seimbang. Hasil ini menunjukkan bahwa kombinasi pumice dan serat sabut kelapa efektif menghasilkan beton ringan dengan ketangguhan lebih baik
Analysis of Coastline Changes in West Leihitu District Using Landsat Imagery Pattilouw, Hafiz Syaifudin; Warniyati, Warniyati; Sihombing, Tri O; Tutkey, Monica R
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.482

Abstract

Coastal areas are currently facing serious threats due to changes in the coastline caused by natural factors such as waves, tides, and ocean currents, as well as human activities such as reclamation, coastal development, and mangrove deforestation. Changes in the coastline can have a direct impact on coastal ecosystems and the lives of surrounding communities, especially in areas where economic activity depends on coastal resources. One area experiencing such dynamics is the West Leihitu District in Central Maluku Regency. This study aims to analyze coastline changes in the West Leihitu District during the period 2015 to 2024 using Landsat 9 satellite imagery and the Geographic Information System (GIS)-based Digital Shoreline Analysis System (DSAS) method. The analysis was conducted spatially and temporally to determine the extent of shoreline shifts, both forward and backward. The image data were processed through radiometric and geometric correction, land-sea boundary delineation, shoreline digitization, and inter-year overlay. The Net Shoreline Movement (NSM) and End Point Rate (EPR) methods were used to calculate the distance and rate of shoreline change. The results of the study show that there were varying changes in the coastline in five coastal villages, namely Larike, Wakasihu, Allang, Liliboy, and Hatu. Larike Village experienced the greatest coastline advance with an average change of 7.05 meters and a rate of 0.78 meters/year, followed by Wakasihu Village with an average of 6.69 meters and a rate of 0.74 meters/year. Meanwhile, Allang and Liliboy villages showed a tendency for shoreline retreat, with average changes of 4.25 meters and 0.85 meters, respectively. Hatu village experienced relatively small changes and tended to be stable.
Land Readiness Analysis for Tanah Kuning Port Based on Integrated Topographic Data Utomo, Edy; Bakri, Muhammad Djaya; Nawir, Daud; Arifin, Muhammad Asfihan Nur; Syarif, Iif Ahmad
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.483

Abstract

The coastal area of Tanah Kuning, Bulungan Regency, is planned as part of the development of the Tanah Kuning-Mangkupadi Industrial Estate and International Port (KIPI) in North Kalimantan Province. This study aims to analyze port land readiness based on topographic conditions to inform technical planning for port development. The study offers an approach to evaluating land readiness by integrating terrestrial surveying using a Total Station with aerial photogrammetry using a UAV drone. The data were processed into a Digital Terrain Model (DTM) and contour maps for slope and land elevation analysis. The assessment was conducted descriptively and evaluatively, in accordance with KP.227/DJPL/2019, taking into account slope conditions, protection against the highest high-water level, and existing land use. The results show that location 1 has the most stable conditions, with dominant slopes of 0-25%, elevations above the highest high-water level, and no active settlements. Therefore, it is classified as suitable. In contrast, Locations 2 and 3 are classified as unsuitable due to the dominance of steep to very steep slopes and socio-land constraints.
Application of the Five-Minute Rating Method in Measuring Labor Productivity at a Jakarta Office Tower Project Sari, Dian Perwita; Siregar, Michael Adams
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.524

Abstract

Labor productivity is a critical factor in construction projects, directly influencing the successful achievement of time and cost targets. This study aims to analyze the comparison of labor productivity levels between regular hours and overtime using the Five-Minute Rating method. The research was conducted at an Office Tower Construction Project, employing a descriptive quantitative approach. Data was collected through three days of observation of worker activities, which were classified into effective work, ineffective work, and essential contributory work, using a five-minute observation interval. The results indicate a significant difference in productivity between regular and overtime hours. During regular hours, the average Labor Utilization Rate (LUR) reached 60.8%, with the peak pattern occurring in the morning (LUR 60.8%-71.5%) and a decline in the afternoon and evening. In contrast, during overtime hours, the average LUR was lower at 53.6%, showing a progressively more noticeable declining trend throughout the night shift. The average productivity decrease during overtime was 7.2%, with the highest decline recorded on the third day at 9.6%. Dominant factors contributing to the productivity decline during overtime include cumulative fatigue following the regular shift, suboptimal lighting conditions, and an increased proportion of non-productive contributory activities, which reached 30-40% of total activities.
The Effect of Relative Density of Geosynthetic Encased Stone Columns on the Bearing Capacity and Consolidation of Soft Soil Hayati, Julita; Simamora, Johanes; Sitepu, Arif Rahman Hakim
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.574

Abstract

Building roads on soft soil is a problem that must be faced due to the behavior of soft soil. The low bearing capacity is the primary issue, accompanied by significant settlement due to the soil's high compressibility. Soft soil is present in the Indrapura-Kisaran Toll Road Construction Project, ranging from STA 111+505 to STA 112+300, so reinforcement is necessary. The reinforcement method used is Geosynthetic Encased Stone Columns (GESC). The density of the GESC material used in this method needs to be examined to determine the effectiveness of GESC in reducing settlement and increasing soil-bearing capacity. The analysis process conducted in this study involves analyzing reinforcement using GESC with empirical and numerical methods. This study uses variations in the relative density of the column material at 25%, 50%, 75%, and 100%. After reinforcement, the soil-bearing capacity increased by 280,37 to 361,71%. Additionally, GESC reinforcement was also able to reduce settlement by up to 64,96% using the analytical method and 41,6% using the numerical method, with a consolidation time reduction of 93,38% to 94,52%. The reduction in relative soil density causes settlement to increase by ±7,2% because the friction angle of the column decreases.
Estimation of Passenger Car Equivalent (PCE) Values in Heterogeneous Traffic Using the Time Headway Method on Timor Raya Road, Kupang City Wadu, Amy; Sodanango, Mateus; Dumin, Ludofikus; Laapen, Angelita
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.605

Abstract

Traffic on urban roads in Indonesia is generally heterogeneous, comprising various vehicle types with distinct characteristics. To analyze heterogeneous traffic flow, all vehicles are converted into Light Vehicle Units (PCU), and this concept forms the basis for the definition of Light Vehicle Equivalent (LPE) in various guidelines. However, the standard PCE values from guidelines such as MKJI 1997 and PKJI 2023 can produce inaccurate traffic performance estimates because PCE values are not universal and are highly dependent on traffic conditions, road geometry, and driving culture in a particular region. This study aims to estimate PCE values using the time-headway method on Jalan Raya Timor in Kupang, Indonesia, which has experienced rapid growth in vehicle volumes, especially motorcycles. The time headway method is considered more dynamic and sensitive in reflecting drivers' perceptions of vehicle spacing, thus providing more accurate PCE values than traditional methods. The results of the study show that the PCE value for motorcycles (MC) ranges from 0.64 to 0.98, while for heavy vehicles (HV) it ranges from 1.05 to 2.16. The vehicle headway time method proved to be more accurate in assessing the volume-capacity ratio (V/C) because it is more sensitive to the time interval between vehicles, resulting in a V/C estimate that is closer to field data compared to the standard PCE method from PKJI.
Analysis of the Effect of Silica Fume as an Additive on the Workability and Compressive Strength of Porous Concrete Tri Cahya, Yayan; Usman, Fathoni; Sinta Devi, Debby
Borneo Engineering: Jurnal Teknik Sipil Volume 10 Nomor 1 Tahun 2026
Publisher : Jurusan Teknik Sipil, Fakultas Teknik, Universitas Borneo Tarakan

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35334/be.v10i1.609

Abstract

The use of porous concrete is a crucial strategy for mitigating surface water runoff in urban areas. However, low compressive strength often poses a major challenge in its application. This study aims to analyze the effect of adding silica fume on the mechanical and hydraulic properties of porous concrete. The research was conducted experimentally in a laboratory setting, following ACI 522R-10 standards for mix proportions and ASTM C39 for compressive strength testing. The silica fume content was varied at 0%, 3%, 5%, and 7% of the total cement weight, with a total of 24 test specimens, each a 10x20 cm cylinder. Test procedures included a slump test for workability, a permeability test, and a 28-day compressive strength test. The results showed that increasing the silica fume content significantly reduced the slump to 0 cm at a 7% increase, indicating that the mixture became stiffer. As the micro-structural density increased, the permeability coefficient decreased from 0.0288 cm/s to 0.0082 cm/s. Although drainage capacity decreased, the compressive strength of the concrete increased significantly by 69.6%, from 6.58 MPa to 11.16 MPa at the 7% content. The novelty of this study lies in identifying the optimal silica fume content to achieve a structural compressive strength above 10 MPa while preserving drainage functionality. These findings confirm that silica fume effectively enhances the mechanical performance and durability of porous concrete, making it highly suitable for use in eco-friendly infrastructure, such as parking lots and neighborhood roads, that require a balance between structural strength and water infiltration efficiency.©The author(s). Published by BEJTSThis is an open-access article distributed under the terms and conditions of the Creative Commons Attribution-ShareAlike 4.0 International License (CC BY-SA 4.0).Introduction: Pervious concrete is a construction material designed with a high level of porosity, allowing water to flow through its internal cavities. This material is widely used in parking areas, pedestrian paths, and sustainable drainage systems due to its ability to reduce surface runoff and increase groundwater  

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