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All Journal Journal of Civil Engineering and Planning (JCEP)
Dhinar Yoga Hanggung Legowo
Teknologi Rekayasa Konstruksi Bangunan Air, Politeknik Negeri Samarinda
Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Transportation

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Geometric Evaluation of Roads with UAV Technology Processed Through Orthophoto-Based Software on Jalan Soekarno Hatta Km 10 – Km 15 East Kalimantan Dhinar Yoga Hanggung Legowo; Dhiana Dwi Widiawati; Angga Ridwan Sayid Mahendra
Journal of Civil Engineering and Planning (JCEP) Vol. 7 No. 1 (2026): JCEP
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v7i1.12469

Abstract

This study evaluates the geometric conditions of the Soekarno-Hatta Poros Road KM 10–KM 15, East Kalimantan, utilizing Unmanned Aerial Vehicle (UAV) technology and Geodetic GPS as Ground Control Points (GCPs). Aerial photographic data were processed within Agisoft Metashape and subsequently analyzed based on the 2021 Bina Marga Road Geometric Design Guidelines. The processing of 1,732 images yielded high-quality orthophotos with a Ground Sample Distance (GSD) value of 3.56 cm/pixel. The model accuracy test produced a Circular Error 90% (CE90) of 0.0090 m and a Linear Error 90% (LE90) of 0.0101 m, thereby fulfilling the specifications for Class 1 Base Maps at a 1:1,000 Scale based on the Geospatial Information Agency (BIG) Regulation No. 6 of 2018. The horizontal alignment evaluation based on the 2021 Bina Marga regulation indicates that out of 34 Spiral-Circle-Spiral (S-C-S) type curves, 28 curves are declared as Not Meeting Requirements (TMS) due to significant transition curve overlap. Similarly, regarding the vertical alignment, a critical unsafe point was identified from STA 2+618 to STA 2+669 because the crest vertical curve is excessively short (L = 51.13 m, K = 9.70). These geometric non-conformities generate blind spots that restrict the stopping sight distance (SSD) within a speed variation of 20–70 km/h. It is recommended to perform phased reconstruction consisting of extending the straight tangent lengths, modifying the critical vertical curve dimensions, and adding road safety facilities.
Analysis Of The Effect Of The Soybean Crude Urease Calcite Precipitation (SCU-CP) Method On The Permeability Of Sandy Clay Soil Raudah Ahmad; IGN Aditya Dhiva; Insan Kamil; Dhinar Yoga Hanggung Legowo; Jalung Alvin Leo
Journal of Civil Engineering and Planning (JCEP) Vol. 7 No. 1 (2026): JCEP
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v7i1.12482

Abstract

Soil with high permeability has the potential to cause seepage, which can lead to piping, ground subsidence, and structural failure. This study aims to evaluate the effectiveness of the Soybean Crude Urease Calcite Precipitation (SCU-CP) method in reducing soil permeability coefficients through a falling-head test. Soil sample A-6 was classified with a liquid limit (LL) of 39.97% and a plastic limit (PL) of 24.38%. The SCU-CP method used urea and CaCl₂ solutions at concentrations of 1 mol/L and 1.5 mol/L, with the addition of 10–30 g/L of soybean powder. The results showed that soil permeability decreased from 4.01 × 10⁻⁴ cm/s to 1.07 × 10⁻⁴ cm/s (73.32%) with the 1 mol/L reagent and to 4.77 × 10⁻⁵ cm/s (88.10%) with the 1.5 mol/L reagent, both using 30 g/L of soybean powder. These results indicate that the SCU-CP method is effective in reducing soil permeability and has the potential to serve as an environmentally friendly alternative for soil stabilization.
Co-Authors Angga Ridwan Sayid Mahendra Dhiana Dwi Widiawati IGN Aditya Dhiva Insan Kamil Jalung Alvin Leo Raudah Ahmad