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All Journal Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Prosiding Seminar Nasional Teknik Sipil UMS
Rizqullah, Naufal Rafif
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Chemical Engineering, Chemistry & Bioengineering Civil Engineering, Building, Construction & Architecture Engineering Environmental Science Industrial & Manufacturing Engineering

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Pemodelan berbasis Uji Non-Destruktif dan Semi-Destruktif yang Divalidasi Uji Vibrasi pada Asesmen Reliabilitas Pondasi Jibcrane Rizqullah, Naufal Rafif; Khoeri, Heri; Buwono, Haryo Koco; Badaruddin, B
Prosiding Seminar Nasional Teknik Sipil UMS 2024: Prosiding Seminar Nasional Teknik Sipil UMS
Publisher : Universitas Muhammadiyah Surakarta

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Abstract

Untuk menjamin keamanan dalam pengoperasian Jibcrane dilakukan pemeriksaan berkala termasuk pada sistem pondasinya. Penelitian ini dilakukan untuk mendapat gambaran reliabilitas sistem pondasi setelah jibcrane beroperasi 10 tahun. Sistem pondasi jibcrane yang diteliti adalah tiang pancang pipa baja yang disatukan pile cap dan diperkuat bracing antar pipa. Pemeriksaan dilakukan dengan uji non-destruktif dan semi-destruktif untuk mendapatkan gambaran aktual dimensi dan mutu elemen struktur. Seluruh data uji dikompilasi sehingga menjadi data yang dapat dijadikan input dalam pemodelan struktur. Penentuan jumlah dan jenis uji mempengaruhi validitas model, dimana semakin banyak dan lengkap, maka model akan lebih merepresentasikan kondisi aktualnya. Validitas model dilakukan dengan uji vibrasi. Hasil analisis menghasilkan frekuensi alami 1,48 Hz, sementara hasil uji vibrasi sebesar 1,5 Hz, dengan nilai frekuensi yang berdekatan menunjukkan data input cukup valid yang menghasilkan respon dinamik mendekati aktualnya. Hasil analisis menunjukkan pondasi jibcrane masih reliabel dengan faktor keamanan 3,1. Kendatipun demikian, untuk memperlambat laju korosi pada baja perlu dilakukan perlindungan dengan melakukan pengecatan berkala permukaan pondasi pipa baja dan bracing pengakunya, melakukan injeksi pada beton yang retak, dan memproteksi beton dari pengaruh reaksi alkali-silika dengan pengecatan anti-korosi berbasis bituminous.
Rainfall-Induced Shallow Slope Failure and Mechanism-Based Stabilization of Telecommunication Infrastructure Khoeri, Heri; Nugroho, Panji; Rizqullah, Naufal Rafif
Reka Buana : Jurnal Ilmiah Teknik Sipil dan Teknik Kimia Vol 11, No 1 (2026): EDISI MARET 2026
Publisher : Universitas Tribhuwana Tunggadewi Malang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.33366/rekabuana.v11i1.8315

Abstract

Rainfall-induced shallow slope failure is a recurrent geotechnical hazard in tropical regions, particularly for slopes supporting critical infrastructure. This paper presents a case study of a shallow translational failure at a telecommunication facility in Batam, Indonesia, following prolonged heavy rainfall. The study integrates subsurface investigation (six boreholes with SPT, electrical resistivity surveys, and laboratory testing) to establish engineering stratigraphy consisting of three units: an upper loose to medium silty sand (Unit I), a medium to dense sand (Unit II), and competent sandstone (Unit III). Limit-equilibrium stability analyses were performed under dry and various rainfall infiltration scenarios, with rainfall effects represented by a rising perched water table (PWT). Results show that the slope is highly stable under dry conditions (factor of safety, FS ? 1.996). However, as the PWT rises from 4 m to 1 m below ground surface, the FS progressively decreases from 1.384 to 0.931, indicating that rainfall-induced pore water pressure increase and loss of matric suction are the governing failure mechanisms. Based on this mechanism, a combined mitigation strategy incorporating surface drainage improvement and soldier pile reinforcement was developed. Under the most critical rainfall scenario (PWT at 1 m depth), the reinforced slope achieves an FS of approximately 1.593, exceeding the recommended minimum of 1.5 for strategic infrastructure. The study highlights the necessity of explicitly incorporating rainfall-driven groundwater rise into slope stability assessments for critical facilities in tropical environments and provides a mechanism-based framework for effective stabilization.
Co-Authors Badaruddin, B Haryo Koco Buwono Heri Khoeri Nugroho, Panji