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All Journal Journal of Civil Engineering and Planning (JCEP) Rekayasa : Jurnal Ilmiah Fakultas Teknik Universitas Lampung
Fikri Alami
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Civil Engineering, Building, Construction & Architecture Control & Systems Engineering Engineering Transportation

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Geotechnical investigation, landslide mechanism and countermeasure on the road above the soft-medium clay Syah, Aminudin; Fikri Alami
Journal of Civil Engineering and Planning (JCEP) Vol. 5 No. 1 (2024)
Publisher : Program Studi Sarjana Teknik Sipil Universitas Internasional Batam

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.37253/jcep.v5i1.9373

Abstract

A landslide event occurred in Sukarami, Lahat Regency, in early 2024. This study investigates the landslide mechanism, analyzes the influence of groundwater level rise and load on slope stability, and proposes a management concept. The methodology employed a landslide survey, soil investigation, and limit equilibrium-based stability analysis. Field investigations and surveys revealed that the landslide resulted from a decrease in the shear strength parameter of the surrounding soil layer triggered by rainfall and road drainage runoff. The slip plane, located within a soft to medium consistency clay layer, exhibits high susceptibility to water-induced instability. Numerical simulations demonstrated a negative correlation between groundwater level and slope safety factor, particularly when the water table reaches the critical slip plane. The implementation of a combined gabion, DPT, and minipile reinforcement system can enhance slope stability and elevate the safety factor to meet established standards. Notably, the addition of vehicle loads up to 30 kN/m2 exerted an insignificant influence on slope stability.
Investigasi Masalah Getaran Pada Struktur Portal Baja Akibat Getaran Mesin Crusher FIKRI ALAMI; Vera Agustriana Noorhidana; Ratna Widyawati
REKAYASA: Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol. 29 No. 2 (2025): Agustus 2025
Publisher : Jurusan Teknik Sipil Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/rekrjits.v29i2.34

Abstract

Getaran berlebihan pada struktur industri sering kali mengabaikan aspek kenyamanan meskipun secara kekuatan desain telah terpenuhi. Penelitian ini bertujuan untuk menginvestigasi respon dinamik struktur portal baja empat lantai akibat beban mesin penghancur batu bara (crusher coal) guna mengevaluasi stabilitas dan kenyamanan bangunan. Metode penelitian yang digunakan adalah eksperimental lapangan menggunakan sensor accelerometer dan simulasi numerik berbasis Finite Element Analysis (FEA) dengan perangkat lunak SAP2000 sebagai pembanding. Hasil investigasi menunjukkan bahwa percepatan getaran vertikal saat mesin beroperasi mencapai 141% G, nilai yang jauh melampaui ambang batas kenyamanan standar sebesar 5% G. Ditemukan pula deviasi antara hasil pemodelan numerik dan data lapangan yang mengindikasikan adanya penurunan mutu material pada struktur eksisting akibat masa layan. Kesimpulan penelitian menegaskan bahwa getaran berlebih dengan amplitudo mencapai 30,9 mm tidak hanya mengganggu proses produksi, tetapi juga membahayakan stabilitas jangka panjang struktur portal baja. Diperlukan langkah mitigasi atau perkuatan untuk mengatasi dampak getaran tersebut.
Analisis Kinerja Struktur Tunnel Batubara pada Fondasi dengan Lapisan Pasir Longgar di Bawah Timbunan Menggunakan Metode Elemen Hingga Fikri Alami; Aminudin Syah
REKAYASA: Jurnal Ilmiah Fakultas Teknik Universitas Lampung Vol. 29 No. 1 (2025): April 2025
Publisher : Jurusan Teknik Sipil Universitas Lampung

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.23960/rekrjits.v29i1.125

Abstract

Co-Authors Abdi Kemal Damanta Angela Chikita Marcus Arnaldo Clever Bayzoni Bayzoni Candra Fauzan Akbar Dedi Vernanda Eddy Purwanto Farhan Nurrohmat Farida Rahma Hadi Putri Ika Kustiani Iswan Iswan Laksmi Irianti Masdar Helmi Mohammad Isneini Mohd Issneini Mohd. Isneini Muhammad Ridho Saputra Nadia Agustina Netta Riana Ratna Widyawati Ridho Rizky Novrian silsila jana firdasa Stephanus Martua Turnip Syah, Aminudin Vania Meutia Andhini Vera Agustriana Noorhidana Vera Agustriana Noorhidana yulisna anggi