Evaluasi Perkerasan Lentur Menggunakan Metode Bina Marga 2024 pada Ruas Jalan Darul Hikmah Terong Tawah, Kecamatan Labuapi

Abstract

Abstract: Road pavement is a critical component of transportation infrastructure that must be capable of carrying traffic loads throughout its design life. This study aims to evaluate the flexible pavement structure of the Darul Hikmah Road section, Terong Tawah, Labuapi District, West Lombok Regency, and to determine the required layer thickness based on the 2024 Bina Marga Pavement Design Manual (Manual Desain Perkerasan Jalan/MDP). The study employed an evaluation approach using traffic volume, traffic growth, Vehicle Damage Factor (VDF), California Bearing Ratio (CBR), and existing pavement structure data. The analysis included determination of the design life, growth factor, Average Daily Traffic (LHR), CESA4 and CESA5, followed by pavement structure selection using Design Chart-4. The results showed that the highest LHR occurred on Tuesday, with 16,559 vehicles/day. For a 20-year design life and a traffic growth rate of 3.50%, the growth factor was 20.07, with a normal CESA5 of 200,390.540 and an actual CESA5 of 528,302.332. The soaked CBR value of the subgrade soil was 12.84%, indicating strong subgrade conditions that did not require improvement. Based on Design Chart-4, Column FF2, the recommended pavement structure consists of a 30 mm HRS-WC layer, a 35 mm HRS-Base layer, a 250 mm Class A LFA layer, and a 150 mm Class B LFA layer, resulting in a total thickness of 465 mm or 46.5 cm. The existing pavement structure, approximately 35 cm thick, is 11.5 cm thinner than the recommended structure and is therefore categorized as potentially under-designed. Compared with the 2017 Bina Marga design method, the 2024 MDP produces a more efficient structure in terms of asphalt and Class A LFA thickness and is more suitable for the characteristics of rural collector roads.

Abstrak: Perkerasan jalan merupakan komponen penting infrastruktur transportasi yang harus mampu melayani beban lalu lintas selama umur rencana. Penelitian ini bertujuan mengevaluasi struktur perkerasan lentur pada Ruas Jalan Darul Hikmah, Terong Tawah, Kecamatan Labuapi, Kabupaten Lombok Barat, serta menentukan ketebalan lapisan berdasarkan Manual Desain Perkerasan Jalan (MDP) Bina Marga 2024. Penelitian menggunakan pendekatan evaluasi dengan data lalu lintas, pertumbuhan lalu lintas, Vehicle Damage Factor (VDF), California Bearing Ratio (CBR), dan data struktur perkerasan eksisting. Analisis dilakukan melalui penentuan umur rencana, faktor pertumbuhan, Lalu Lintas Harian Rata-rata (LHR), CESA4 dan CESA5, kemudian pemilihan struktur menggunakan Bagan Desain-4. Hasil menunjukkan LHR tertinggi terjadi pada hari Selasa sebesar 16.559 kendaraan/hari. Untuk umur rencana 20 tahun dengan pertumbuhan lalu lintas 3,50%, diperoleh faktor pertumbuhan 20,07, CESA5 normal sebesar 200.390,540 dan CESA5 faktual sebesar 528.302,332. Nilai Soaked CBR tanah dasar sebesar 12,84% menunjukkan kondisi tanah dasar kuat sehingga tidak memerlukan perbaikan. Berdasarkan Bagan Desain-4 kolom FF2, struktur yang direkomendasikan terdiri atas HRS-WC 30 mm, HRS-Base 35 mm, LFA Kelas A 250 mm, dan LFA Kelas B 150 mm dengan total ketebalan 465 mm atau 46,5 cm. Struktur eksisting sekitar 35 cm lebih tipis 11,5 cm dan dikategorikan berpotensi under-design. Dibandingkan Bina Marga 2017, MDP 2024 menghasilkan struktur yang lebih efisien pada ketebalan aspal dan LFA Kelas A, serta lebih sesuai dengan karakteristik jalan kolektor rural.