Question

22 A 100-psi pressure is applied through a circular area 12 in. in diameter on a granular hali efficient space, as shown in Figure P2.2. The half-space has mass unit weight its 110 pcf, c of earth pressure at rest is 0.6, its Poisson ratio is 0.35, and its elastic modulus varies with the sum of normal stresses according to the equation shown in the figure. Assuming the Boussinesq stress distribution is valid and that the stresses at a point 12 in. below tne center of the loaded area are used to compute the elastic modulus, determine the mum surface displacement. [Answer:0.054 in.] that 12 in. 100 psi HHI K, = 0.6 -0.35 12 in. 0.55 E 30000 FIGURE P2.2

Pavement Analysis and Design

Answer 1

ag, 446 Ps. 12 hxo.6 12.3 с 30,03 psi 1489 31