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Ahmad Kurnain, Ahmad
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Analisis Konstruksi Substruktur Jembatan Rangka Baja Sungai Rokan Kiri di Kota Tengah Kabupaten Kampar Kurnain, Ahmad; Yazid, Muhammad; Tisnawan, Rahmat; Basri, Doni Rinaldi; Ningrum, Puspa
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 3 (2025): November 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i3.1261

Abstract

Penelitian ini membahas perencanaan teknis bangunan bawah jembatan, khususnya abutment pada Jembatan Rangka Baja Sungai Rokan Kiri di Kota Tengah, Kabupaten Kampar. Metode penelitian yang digunakan meliputi studi literatur dan studi desain, dengan pengumpulan data primer berupa hasil sondir, data tanah, topografi, serta hidrografi aliran sungai. Analisis dilakukan terhadap beban yang bekerja pada abutment, meliputi beban vertikal, beban horizontal, serta tekanan tanah lateral. Faktor keamanan terhadap geser (SF-{geser}) dan guling (SF-{guling}) dihitung untuk memastikan stabilitas konstruksi. Hasil perhitungan menunjukkan bahwa abutment yang direncanakan memenuhi kriteria keamanan yang dipersyaratkan, baik terhadap gaya geser maupun gaya guling, sesuai dengan standar peraturan Departemen Pekerjaan Umum. Dengan demikian, rancangan bangunan bawah jembatan ini dapat dinyatakan layak secara teknis dan aman digunakan dalam mendukung beban lalu lintas di atasnya.   This study discusses the technical planning of bridge substructures, particularly the abutment of the Steel Truss Bridge over the Rokan Kiri River in Kota Tengah, Kampar Regency. The research methods employed include a literature review and design study, with primary data collection consisting of cone penetration test (CPT) results, soil data, topographic data, and river flow hydrology data. The analysis focuses on the loads acting on the abutment, including vertical loads, horizontal loads, and lateral earth pressure. Safety factors against sliding (SF_sliding) and overturning (SF_overturning) are calculated to ensure the structural stability of the abutment. The calculation results indicate that the planned abutment meets the required safety criteria against both sliding and overturning forces in accordance with the standards set by the Ministry of Public Works. Therefore, the design of the bridge substructure can be considered technically feasible and safe to support traffic loads above it.  
Kajian Debit Banjir Rencana serta Simulasi Genangan Menggunakan Model HEC-RAS pada Sungai Kampar Husaini, Rizki Ramadhan; Kurnain, Ahmad; Riandi, Daly
Impression : Jurnal Teknologi dan Informasi Vol. 4 No. 3 (2025): November 2025
Publisher : Lembaga Riset Ilmiah

Show Abstract | Download Original | Original Source | Check in Google Scholar | DOI: 10.59086/jti.v4i3.1390

Abstract

Sungai Kampar merupakan salah satu sungai utama di Provinsi Riau yang memiliki potensi banjir tinggi akibat luasnya daerah aliran sungai serta pengaruh kondisi hidrologi dan hidrolika. Penelitian ini bertujuan menganalisis debit banjir rencana dan mensimulasikan sebaran genangan menggunakan model HEC-RAS. Analisis hidrologi dilakukan berdasarkan data hujan maksimum tahunan periode 1970–2020 dari Stasiun Pasar Kampar. Uji distribusi menunjukkan bahwa distribusi Log Normal paling sesuai. Intensitas hujan dihitung dengan metode Mononobe dan didistribusikan menggunakan Alternate Block Method (ABM) untuk durasi 6 jam. Debit banjir rencana dihitung dengan metode hidrograf satuan Nakayasu untuk kala ulang 20 tahun, menghasilkan debit puncak sebesar 2185,18 m³/s. Simulasi hidrolika dilakukan dengan dua skenario, yaitu banjir tertinggi dan banjir tahunan. Hasil menunjukkan bahwa pada banjir tertinggi terjadi luapan signifikan pada STA 300–500 dengan kedalaman genangan maksimum 1,54 m di bantaran kanan dan 0,46 m di bantaran kiri. Pada banjir tahunan, genangan relatif terbatas dan tidak meluap di beberapa penampang. Hasil ini dapat menjadi dasar perencanaan pengendalian dan mitigasi risiko banjir di wilayah Sungai Kampar.   Kampar River is one of the main rivers in Riau Province with significant flood potential due to its large watershed and complex hydrological–hydraulic characteristics. This study aims to estimate the design flood discharge and simulate flood inundation using the HEC-RAS model. Hydrological analysis was conducted using annual maximum daily rainfall data from 1970–2020. Among the tested distributions, Log Normal was found to be the most suitable. Rainfall intensity was calculated using the Mononobe method and temporally distributed using the Alternate Block Method (ABM) for a 6-hour storm duration. The 20-year return period flood discharge was estimated using the Nakayasu synthetic unit hydrograph, resulting in a peak discharge of 2185.18 m³/s. Hydraulic simulations were performed under two scenarios: extreme flood and annual flood conditions. Results indicate significant overbank flooding during the extreme scenario, particularly between STA 300–500, with maximum inundation depths of 1.54 m on the right overbank and 0.46 m on the left. In contrast, annual flood conditions produce limited inundation without overtopping in several cross-sections. These findings provide a technical basis for flood control planning and risk mitigation in the Kampar River area.  
Co-Authors Alputra, Giya Naufal Anugerah, M Fajar Bagio, Toni Hartono BAMBANG SUPENO Doni Rinaldi Basri Eka Susanti Ellya, Hikma Farah Diena, Nurin Nisa Hairil Ifansyah Husaini, Rizki Ramadhan lestari, Suci Shinta Mahmud Mahmud Muhammad Imam Nugraha Muhammad Yazid Muhammad Yazid Mulyawan, Ronny Nufita Sari, Nukhak Nurlaila Nurlaila Puspa Ningrum Rahma Apriani, Rila Rahmat Tisnawan Ramadhani, Riko Putra Riandi, Daly Rony Riduan Surya, Afin