Design Planning for Road Pavement Upgrading Using Rigid Pavement on the Gotri–Damarjati Road Segment

Abstract

The Gotri–Damarjati road section experiences various problems, including structural deterioration, resulting in uneven, undulating, and pothole-ridden pavement conditions. Therefore, an alternative pavement system with greater structural durability is required. This study adopted the Directorate General of Highways (Bina Marga) Pd T-14-2003 guideline with a 20-year design life and included drainage dimension planning. The results indicate that: (1) the average daily traffic reached 3,269.7 passenger car units/day, with a peak traffic volume of 3,284 vehicles/hour on Monday mornings, dominated by motorcycles and passenger cars; (2) the rigid pavement design employed Jointed Plain Concrete Pavement (JPCP) with a 25 cm concrete slab thickness, using concrete with a flexural strength of 3.5 MPa, a 10 cm lean concrete subbase with a 28-day compressive strength of 5.5 MPa placed over the existing pavement layer, tie bars of deformed steel (Ø16 mm, 70 cm length, 75 cm spacing), and dowel bars of plain steel (Ø36 mm, 450 mm length, 300 mm spacing); and (3) the drainage design, based on the Pd. T-02-2006-B Road Drainage System Planning Guideline produced a discharge capacity of 0.51 m³/s with planned channel dimensions of 0.9 m width and 0.45 m depth, providing a channel area of 0.405 m² and a discharge capacity of 0.6 m³/s. The side drains were designed using concrete rectangular channels or 60 × 80 cm U-ditch sections.