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All Journal Jurnal Teknik Sipil dan Teknologi Konstruksi Jurnal Konstruksi dan Infrastruktur : Teknik Sipil dan Perencanaan
Muhammad Rizki Arif
Institut Teknologi Sumatera
Civil Engineering, Building, Construction & Architecture Engineering Industrial & Manufacturing Engineering Mechanical Engineering Transportation

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ANALISIS DAYA DUKUNG PONDASI BORED PILE PROYEK PEMBANGUNAN RSNTT18-01 PASAR JUM’AT JAKARTA SELATAN Muhammad Rizki Arif; Nur Syahidah Aini; Hadyan Arifin Bustam; Nurwanda Sari
Jurnal Teknik Sipil dan Teknologi Konstruksi Vol 11, No 2 (2025): JURNAL TEKNIK SIPIL DAN TEKNOLOGI KONSTRUKSI
Publisher : Universitas Teuku Umar

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.35308/jts-utu.v11i2.13139

Abstract

As urban populations grow, additional housing is urgently needed. The development of housing infrastructure is therefore crucial to supporting the community's daily activities. The Pasar Jumat High-Rise Apartment Development Project (RSNTT18-01) is located on Jalan Sapta Taruna Raya in Lebak Bulus, South Jakarta. One area worked on is the foundation. A foundation is defined as a construction at the base of a structure or building that transfers the load from the upper part of the structure or building to the soil layer below. Every foundation must be able to support loads up to a predetermined safety limit. This study aims to determine the bearing capacity of the piles that can withstand these loads. The RSNTT18-01 project uses a bored pile foundation. The bearing capacity of a bored pile foundation is calculated using bored  Penetration Test (SPT) data. According to the research, the bearing capacity of a bored pile at a depth of 12 meters is 3,8× N, with a structural load (Pu) equal to 6.5647 x 109 N, then one pile cap requires 18 piles.
Analisis Dampak Mud Pumping Terhadap Kerusakan Sleeper Pada Jalur Kereta Api Tanjung Karang – Rejosari (Studi Kasus Divre IV Tanjung Karang) Muhammad Rizki Arif; Roy Jones Lumban Siantar; Febriyadi Febriyadi; Arif Setyaji; Nurwanda Sari; Nur Annisa Mardhotillah; Nur Syahidah Aini; Rahmatika Dwi Putri Jori
Jurnal Konstruksi dan Infrastruktur : Teknik Sipil dan Perencanaan Vol 14 No 1 (2026): Jurnal Konstruksi dan Infrastruktur Vol 14 No.1 : April 2026
Publisher : Civil Engineering Department, Faculty of Engineering, Universitas Swadaya Gunung Jati

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33603/jki.v14i1.11977

Abstract

This study analyzes the impact of mud pumping on track stability and damage to K-550-type monoblock concrete sleepers on the Tanjung Karang–Rejosari line (DIVRE IV Tanjung Karang). This Class I track, with a gauge of 1,067 mm, carries an annual load of 82,883.21 tons. Mud pumping causes water mixed with mud to rise to the surface of the ballast, which disrupts load distribution and the stability of the track structure. The research methodology comprises four main stages: (1) field observations at four critical locations (Km 13+8/9, Km 14+2/3, Km 25+2/3, and Km 28+5/6); (2) measurements using a Dynamic Cone Penetrometer (DCP) and a densometer to obtain RC, CBR, and Evd parameters; (3) track geometry evaluation to detect elevation deviations; and (4) technical analysis of sleepers based on an elastic modulus of 150,093.30 kg/cm² and a permissible stress of 210 kg/cm². The research results indicate that the most critical condition is at Km 25+2/3, with an RC value of 14.37 kN/m, a CBR of 3.85%, and an Evd of 41.6 MN/m². Overall, several segments have CBR values below the safe threshold (15–24%), indicating a significant decrease in ballast density due to mud pumping. Technical analysis confirms that mud accumulation disrupts the distribution of effective stress and accelerates sleeper deterioration. As a mitigation measure, it is recommended to install woven geotextile, replace the ballast material, and implement periodic monitoring using DCP/densometer instruments to maintain track stability within acceptable limits and extend the service life of the railway infrastructure.
Co-Authors Arif Setyaji Febriyadi Hadyan Arifin Bustam Nur Annisa Mardhotillah Nur Syahidah Aini Nur Syahidah Aini Nurwanda Sari Nurwanda Sari Rahmatika Dwi Putri Jori Roy Jones Lumban Siantar