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All Journal Teknik Sipil dan Arsitektur Pondasi Journal of Advanced Civil and Environmental Engineering Rancang Bangun JURNAL KAJIAN TEKNIK SIPIL Jurnal Teknik Sipil dan Arsitektur Journal of Civil Engineering and Planning (JCEP) Jurnal Pengabdian kepada Masyarakat GANESHA: Jurnal Pengabdian Masyarakat Jurnal Cakrawala Ilmiah International Journal of Sustainable Building, Infrastructure and Environment Journal Of Civil Engineering And Infrastructure Technology
Reki Arbianto
Universitas Tunas Pembangunan Surakarta (UTP)
Agriculture, Biological Sciences & Forestry Humanities Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Economics, Econometrics & Finance Education Engineering Environmental Science Languange, Linguistic, Communication & Media Law, Crime, Criminology & Criminal Justice Materials Science & Nanotechnology Physics Public Health Social Sciences Transportation Other

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Flood Analysis of Pepe Baru River Sub-Watershed Using HEC-RAS 4.1 Aplikasi Wijayanti, Paska; Sungkono, Kukuh Kurniawan Dwi; Arbianto, Reki; Utomo, Dhody Budi
Journal of Civil Engineering and Planning (JCEP) Vol. 6 No. 2 (2025)
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v6i2.11398

Abstract

The conversion of catchment areas into built-up land has increased surface runoff and reduced natural river storage capacity, thereby elevating flood risk, particularly during high rainfall events. One area that frequently experiences flooding is Sekip Kadipiro, located within the Pepe Baru Sub-watershed of the Pepe Watershed system in Surakarta City. The hydrological connection of this area to the Pepe Watershed makes it highly vulnerable to flooding. In January 2023, heavy rainfall caused inundation affecting approximately six residential houses in Sekip Kadipiro. This study aimed to determine the 20-year return period design flood discharge and to simulate flooding in the Sekip Kadipiro area using the HEC-RAS 4.1 application. The analysis utilized 17 years of rainfall data, physical characteristics of the Pepe Baru Sub-watershed, and river geometry data processed using QGIS 3.10. The 20-year design rainfall was calculated using the Log Pearson Type III method, resulting in a value of 359.422 mm. Hourly rainfall distribution was analyzed using the ABM method for a duration of four hours, while effective rainfall was determined using the SCS-CN method. The design flood discharge for the 20-year return period was estimated using the Nakayasu Synthetic Unit Hydrograph method, yielding a peak discharge of 1745.42 m³/s. Hydraulic simulation results from HEC-RAS 4.1 indicate that floodwater levels reach an average of 1.75 m above the embankment crest. This demonstrates that the existing river channel capacity is insufficient to convey the design flood discharge, resulting in overflow and a high potential for flooding in surrounding residential areas.
ANALISIS DAYA DUKUNG PONDASI TIANG PANCANG PADA PEMBANGUNAN ASRAMA PUTRI MTA KARANGANYAR Fajar, Maulana; Arbianto, Reki; Amhudo, Rasyiid Lathiif
Journal of Civil Engineering and Infrastructure Technology Vol 4 No 2 (2025): JCEIT
Publisher : Civil Engineering, Faculty of Engineering, Universitas Tunas Pembangunan Surakarta

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.36728/jceit.v4i2.5874

Abstract

This study analyses the bearing capacity of pile foundations in the construction project of the MTA Women's Boarding School Dormitory in Karanganyar Regency, Central Java. Pile foundations were chosen due to unstable soil conditions and the need for structures capable of withstanding large loads. This study combines analytical approach based on Cone Penetration Test (CPT) data with numerical simulation using Geo5 PILEGROUP software to evaluate the axial, lateral and settlement bearing capacity of the foundation. CPT data was taken from three points (S1, S2, S3) with an investigation depth of up to 13 metres. Single pile bearing capacity analyses were conducted using the Mayerhof (1976) method for axial loads and the Broms (1964) method for lateral loads. The results of the calculation obtained the largest value of S1 sondir D30 Qa = 40 tonnes, D40 Qa = 68 tonnes, and D60 = 147 tonnes. group pile analysis was carried out by considering group efficiency, distance between poles, and load distribution. The results showed that the 2-pile configuration with 3D spacing (1.8 m) was able to withstand a maximum load of 2398.135 kN, greater than the largest structural load (1582.305 kN). The pile group efficiency ranged from 0.998-1, indicating high effectiveness in distributing loads. Foundation settlement was calculated using the semi-empirical method, with the results of the largest single pile settlement of 0.6m diameter Sg = 0.022 m and pile group Sg = 0.043 m in S2 sondir data. and in geo5 software the largest settlement at D40 = 4.3 cm.
Co-Authors Abdus Salam, Mahfudh Abdus Salam Astungkoro, Wisnu Wregas Dian Arumningsih Dian Purnamawanti Erni Mulyandari Fajar, Maulana Fakiq, Thoha Firmansyah, Safabelle G Gunarso Gatot Nursetyo Gunarso Gunarso GUNARSO GUNARSO Hamdany, Sharief Herman Susila Hery Widijanto Kareri Laki, Sintia Kartawidjaya, Maria A Kasih, Mutiara Kukuh Kurniawan Dwi Sungkono Kurniawan Dwi Sungkono, Kukuh Lisa Fitriyana Melisa Mulyadi Pande, Made Eka Prayuda Paska Wijayanti Prasetyo, Erwin Aji Puji Prasetiawan RA Dinasty Purnomoasri RA Dinasty Purnomoasri RA Dinasty Purnomoasri Rasyiid Lathiif Amhudo Rasyiid Latiif Amhudo Rizal Kurniawan Siti Esa Suryo Handoyo Teguh Yuono TEGUH YUONO, TEGUH Tri Hartanto Utomo, Dhody Budi Yulia, Atika Candra