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All Journal Indonesian Geotechnical Journal Journal of Applied Civil and Environmental Engineering (JACEE)
Prakasa, Muhammad Dwiyanto Agung
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Civil Engineering, Building, Construction & Architecture Earth & Planetary Sciences Environmental Science Materials Science & Nanotechnology Transportation

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Analisis Arus Lalu Lintas dan Evaluasi Kinerja Jalan Sekitar Kantor Pemerintahan Kabupaten Bone Amansah, Muh. Sucitra; Prakasa, Muhammad Dwiyanto Agung; Darwis, Istiawati; Putri, Awliyah
Journal of Applied Civil and Environmental Engineering Vol. 4 No. 1 (2024): April 2024
Publisher : Politeknik Negeri Ujung Pandang

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.31963/jacee.v4i1.4891

Abstract

Aktivitas dan kegiatan di kawasan perkantoran pemerintah yang menjadi fokus penelitian ini telah menyebabkan peningkatan arus kendaraan, sehingga mempengaruhi kinerja jalan di sekitarnya. Penelitian ini berfokus pada pengamatan arus lalu lintas kendaraan serta evaluasi kinerja jalan menggunakan parameter nilai derajat kejenuhan (DJ). Metode yang digunakan mencakup pencatatan lalu lintas untuk mengukur arus kendaraan dan penilaian kinerja jalan berdasarkan nilai DJ, yang mengikuti pedoman PKJI 2023. Keberadaan kawasan perkantoran pemerintah ini memiliki dampak nyata terhadap pola lalu lintas di sekitarnya. Dari penelitian ini menggambarkan kondisi volume arus lalu lintas di kawasan perkantoran ini umumnya lebih padat saat hari kerja jika dibandingkan dengan hari libur. Pada hari kerja, nilai DJ berkisar antara 0,35 hingga 0,51, yang tergolong dalam indeks tingkat pelayanan jalan kategori B, menunjukkan bahwa jalan masih berfungsi dengan cukup baik namun mulai menunjukkan tanda-tanda peningkatan kepadatan. Sementara itu, pada hari libur, nilai DJ berada dalam rentang 0,07 hingga 0,31, yang tergolong dalam indeks tingkat pelayanan jalan kategori A, menunjukkan bahwa kondisi arus lalu lintas yang sangat baik dengan sedikit gangguan dan kecepatan yang hampir maksimal.
Effectiveness of buttress wall in reducing wall deflection for deep excavation supported by tied-back retaining wall systems: English Abdi, Ari Surya; Prakasa, Muhammad Dwiyanto Agung
Indonesian Geotechnical Journal Vol. 4 No. 2 (2025): Vol. 4, No. 2, August 2025
Publisher : Himpunan Ahli Teknik Tanah Indonesia

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.56144/igj.v4i2.120

Abstract

This study evaluates the effectiveness of buttress walls (BWs) in reducing wall deflection and ground anchor force in deep excavations supported by tied-back retaining systems. A three-dimensional finite element model (3D FEM) was employed for the study. First, a well-documented excavation project located in Vietnam that adopted BW in combination with ground anchors was first back-analyzed to validate the numerical model. The results showed good agreement between computed wall deflections and field measurements across all excavation stages. In the Vietnam case study, the BW was temporary and was demolished after the final excavation stage. The ground anchors installed were to limit the wall deflection during BW demolition. Parametric studies were then conducted to assess two BW configurations: inner BW (I-BW), placed within the excavation area (Vietnam case), and outer BW (O-BW), located behind the retaining wall. The two configurations were analyzed with and without ground anchors. In addition, one run with only ground anchors was conducted to evaluate the effectiveness of BW vs. ground anchors. Results show that both BW configurations reduced wall deflections and anchor forces, with O-BW performing slightly better in the absence of ground anchors due to additional frictional resistance between the BW and the retained soil throughout excavation stages. When ground anchors are used, the difference in performance between I-BW and O-BW becomes negligible due to increased system stiffness. For wall retained by ground anchors only, the deflection of wall is flexible, whilst wall retained by BW only shows rigid behaviour. The maximum deflection, however, is of similar magnitude when the wall is retained by O-BW only and ground anchors only. The deflection is slightly larger when retained by I-BW only. The findings highlight the potential of combining BWs with anchors to increase the rigidity of structural system and enhance excavation safety, particularly under complex soil conditions
Co-Authors Abdi, Ari Surya Amansah, Muh. Sucitra Darwis, Istiawati Putri, Awliyah