design pavment

timer Asked: Apr 19th, 2017

Question Description


Design Project Information Design a new rigid pavement for a major interstate highway using the following data and conditions: Number of lanes: 6-lane facility Pavement location: urban Pavement functional classification: Interstate Annual growth rate: 2% Design period 20 years Construction Materials: PCC: Ec = 31,026 MPA (4,500,000 psi) PCC: S’c = 5.17 MPa (750 psi) Load Transfer: Use dowel bars Serviceability: Use pi = 4.5, Pt = 3.0 Traffic counts: Single unit trucks (assume 0.34 ESALs per truck) = 1,872/day Double unit trucks (assume 1.00 ESALs per truck) = 1,762/day Articulated trucks (assume 2.60 ESALs per truck) = 247/day Subgrade: MR = 103 MPa (15,000 psi) in the dry months of May through October MR = 86 MPa (12,500 psi) in the wet months of November through April Use the 1993 AAHSTO Guide for Design of Pavement Structures procedure to design this pavement. State appropriate assumptions, design charts and recommended values whenever required. All used charts should be submitted together with the design report. Show all the computations.

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