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A Structural Number SN, =5.0 and was obtained using a subgrade M, =5000 psi using the AASHTO 1993 flexible pavement design method. Also, a Structural Number SN, =3.9 was obtained using a Subbase M, =13000 psi . Finally, a Structural Number SN, =3.0 was obtained using a Base M, =25000 psi. Also, using M, values of each layer, structural layer coefficients of a, = 0.41 , a, =0.12 and a, =0.098 were obtained for Asphalt, Base and Subbase layers respectively. Determine a suitable pavement structure. Use drainage coefficient values of m, =1.0 and m, =1.0 for the Base and Subbase layers respectively. [Note: Layer thicknesses, should be rounded up to the nearest 0.5 inches]. HINT Next lower Structural Structural layer coefficient Number (SN) obtained Structural layer M, Drainage Coefficient Next lower To Design number layer used in needed (SN) using Nomograph finding SN Surface Asphalt Layer SN, = 0.41 SN = 3.0 Base 25000 psi SN, = 3.9 SN, = 5.0 SN, Subbase 13000 psi az = 0.12 Base m, =1.0 Subbase SN; Subgrade 5000 psi az =0.098 m, =1.0

A Structural Number SN, =5.0 and was obtained using a subgrade M, =5000 psi using the AASHTO 1993 flexible pavement design method. Also, a Structural Number SN, =3.9 was obtained using a Subbase M, =13000 psi . Finally, a Structural Number SN, =3.0 was obtained using a Base M, =25000 psi. Also, using M, values of each layer, structural layer coefficients of a, = 0.41 , a, =0.12 and a, =0.098 were obtained for Asphalt, Base and Subbase layers respectively. Determine a suitable pavement structure. Use drainage coefficient values of m, =1.0 and m, =1.0 for the Base and Subbase layers respectively. [Note: Layer thicknesses, should be rounded up to the nearest 0.5 inches]. HINT Next lower Structural Structural layer coefficient Number (SN) obtained Structural layer M, Drainage Coefficient Next lower To Design number layer used in needed (SN) using Nomograph finding SN Surface Asphalt Layer SN, = 0.41 SN = 3.0 Base 25000 psi SN, = 3.9 SN, = 5.0 SN, Subbase 13000 psi az = 0.12 Base m, =1.0 Subbase SN; Subgrade 5000 psi az =0.098 m, =1.0

Structural Analysis
Structural Analysis
6th Edition
ISBN:9781337630931
Author:KASSIMALI, Aslam.
Publisher:KASSIMALI, Aslam.
Chapter2: Loads On Structures
Section: Chapter Questions
Problem 1P
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A Structural Number SN, =5.0 and was obtained using a subgrade M, = 5000 psi using the AASHTO 1993 flexible pavement design method. Also, a Structural Number SN, =3.9 was obtained using a Subbase M, =13000 psi . Finally, a Structural Number SN, =3.0 was obtained using a Base M, = 25000 psi. Also, using M, values of each layer, structural layer coefficients of a, = 0.41 , a, =0.12 and a, =0.098 were obtained for Asphalt, Base and Subbase layers respectively. Determine a suitable pavement structure. Use drainage coefficient values of m, =1.0 and m, =1.0 for the Base and Subbase layers respectively. [Note: Layer thicknesses, should be rounded up to the nearest 0.5 inches]. HINT Structural Next lower Number (SN) obtained Structural Structural Drainage Next lower layer M, To Design number layer coefficient Coefficient layer used in needed (SN) using Nomograph finding SN Surface SN, SN = 3.0 Asphalt Layer Base 25000 psi a = 0.41 Base SN, Subbase 13000 psi а, 3D 0.12 т, %3D1.0 SN, = 3.9 Subbase SN3 Subgrade 5000 psi az = 0.098 m3 = 1.0 SN, = 5.0
Transcribed Image Text:A Structural Number SN, =5.0 and was obtained using a subgrade M, = 5000 psi using the AASHTO 1993 flexible pavement design method. Also, a Structural Number SN, =3.9 was obtained using a Subbase M, =13000 psi . Finally, a Structural Number SN, =3.0 was obtained using a Base M, = 25000 psi. Also, using M, values of each layer, structural layer coefficients of a, = 0.41 , a, =0.12 and a, =0.098 were obtained for Asphalt, Base and Subbase layers respectively. Determine a suitable pavement structure. Use drainage coefficient values of m, =1.0 and m, =1.0 for the Base and Subbase layers respectively. [Note: Layer thicknesses, should be rounded up to the nearest 0.5 inches]. HINT Structural Next lower Number (SN) obtained Structural Structural Drainage Next lower layer M, To Design number layer coefficient Coefficient layer used in needed (SN) using Nomograph finding SN Surface SN, SN = 3.0 Asphalt Layer Base 25000 psi a = 0.41 Base SN, Subbase 13000 psi а, 3D 0.12 т, %3D1.0 SN, = 3.9 Subbase SN3 Subgrade 5000 psi az = 0.098 m3 = 1.0 SN, = 5.0
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