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All Journal Jurnal Karajata Engineering Journal of Research and Inovation in Civil Engineering as Applied Science
Suratmin
Politeknik Negeri Ketapang
Civil Engineering, Building, Construction & Architecture Environmental Science

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Evaluasi Daya Dukung Fondasi Tiang Menggunakan PDA dan CAPWAP pada Gardu Induk Rabiya; Suratmin; Nur Aida
Jurnal Karajata Engineering Vol. 6 No. 2 (2026): 2026
Publisher : Fakultas Teknik Universitas Muhammadiyah Parepare

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31850/karajata.v6i2.4132

Abstract

Extra-high voltage substations require reliable pile foundations to ensure structural stability and safety. One method of evaluating the bearing capacity of pile foundations in the field is dynamic testing using a Pile Driving Analyzer or PDA combined with CAPWAP analysis. This study aims to evaluate the bearing capacity of pile foundations at extra-high voltage substations based on PDA test results and compare them with analytical calculations using the Meyerhof method. The testing was conducted on two installed pile foundations using the high strain dynamic testing method in accordance with the ASTM D4945 standard. Field data was obtained from measurements of force and velocity during hammering, then analyzed using CAPWAP software to determine the characteristics of tip resistance and skin friction. The analysis results showed that the ultimate bearing capacity based on the Meyerhof method was 1884.96 kN, while the CAPWAP analysis results showed a lower end bearing capacity, namely 167.3 kN for pole P-1 and 11.6 kN for pole P-2. This significant difference indicates that the dynamic test results are greatly influenced by soil conditions and soil-pile interaction in the field. This finding emphasizes the importance of using dynamic tests as a field evaluation to verify analytical calculation results in pile foundation design.
Pengaruh Penggunaan Serbuk Cangkang Ale-Ale Terhadap Kuat Tekan dan Absorpsi Paving Block Muhammad Rafli Mahendra; Suratmin; Firmanilah Kamil
Journal of Research and Inovation in Civil Engineering as Applied Science (RIGID) Vol 5 No 2 (2026)
Publisher : Teknik Sipil, Politeknik Negeri Ketapangg

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.58466/yheh1c73

Abstract

Ketapang Regency is widely known for its ale-ale clam (Meretrix sp.) commodity, yet high consumption rates generate a massive amount of hard shell waste that remains underutilized and pollutes the environment. Concurrently, conventional paving block production continuously exploits natural fine aggregates on a massive scale. This experimental study aims to analyze the effect of utilizing ale-ale shell waste as a partial substitution for fine aggregate on the compressive strength and water absorption characteristics of paving blocks based on the SNI 03-0691-1996 standard. The reference mixture proportion used was 1 Cement : 4 Sand (by volume) with variation rates of ale-ale shell substitution at 0% (normal), 5% (Variation I), 10% (Variation II), and 15% (Variation III). A total of 48 samples were tested to evaluate the compressive strength at 7, 14, and 28 days, as well as water absorption at 28 days. The results indicated that the optimum compressive strength growth was achieved by Variation II (10% ale-ale shell), reaching 17.23 MPa at 28 days, which significantly increased compared to the normal sample at only 14.06 MPa. Conversely, increasing the shell content to 15% in Variation III drastically reduced the compressive strength to 10.78 MPa. In terms of physical testing, Variation II (10%) recorded the lowest and most dense water absorption percentage of 9.83%. The water absorption characteristics of other variations exceeded the threshold, measuring at 10.32% (normal), 10.75% (Variation I), and 11.26% (Variation III). Based on the SNI 03-0691-1996 specification, only Variation II (10%) was declared to satisfy all physical and mechanical feasibility parameters for Grade D paving block classification (non-structural/garden).
Co-Authors Firmanilah Kamil Muhammad Rafli Mahendra Nur Aida Rabiya