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Question: for the same conditions in problem 1 if a 4quot...

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For the same conditions in problem (1), if a 4" full depth asphalt concrete layer is to be constructed on top of the earth road as shown in Figure 2 having an elastic modulus 'E' of 150,000 psi and μ = 0.4, calculate the difference in vertical stress σz and difference in vertical deflection Δz between point 1 and point 2. (Hint: use 2-layer elastic theory)

P 18,000 lbs p 80 psi Point 1 E 6,000 psi H 0.5 Point 4 2-4, r-4 Point 3 z 4, r 4 Point 2 Figure 1

P 18,000 lbs p 80 psi Point 1 E 150,000 psi μ 0.4 Point 2 E 6,000 psi μ 0.5 :411, r = 0 Figure 2:

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