Referring to Table 1 given below. a-Estimate the corrected N1 value for each Nfield. b-Estimate the (N1)avg value you would use for a footing 2.5 x 2.5 m in dimensions and located at 3 m depth (Df). Assume the unit weight of both sands is 18 kN/m3 and 20 kN/m3 above and below the ground water table, respectively. Note that overburden correction and other corrections based on GWT should be made (w =10 kN/m2 ). Assumption significant depth: 0.5 B above, 2B below the footing. c-Estimate the deformation modulus of gravelly sand at 10 m depth using Menzenbach's (1967) criteria. d- Estimate the allowable bearing capacity of a square footing for an allowable settlement of 15 mm. Note that the Nfield values can be used as N55 during the calculations. Use Bowles approach (1996). e-Estimate the (N1)60 for each Nfield value for sand layers [borehole diameter= 200 mm and the remaining correction factors should be taken according to the Turkey Regulations (i.e., Donut with 2 turns on cathead].

Table 1. Boring Profile (Ground water table, GWT = 5m) Depth (m) SPT-Nfield Soil Type Soil Properties (for Q2) 2 7 Sand (FC = 10; NP) 4 9 Sand (FC S 10; NP) 6 8 Sand (FC S 10; NP) 8 9 Sand (FC = 10; NP) 10 12 Gravelly sand (FC = 5; NP) 12 15 Gravelly sand (FC 5; NP) 14 22 Silty fine sand (FC > 15; NP) 16 28 Silty fine sand (FC > 15; PI=10) 18 31 Silty fine sand (FC > 15; Pl=15) 20 38 Clayey sand (FC > 35; PI=20) Table 1. Boring Profile (Ground water table, GWT = 5m) Depth (m) SPT-Nfield Soil Type Soil Properties (for Q2) 2 7 Sand (FC = 10; NP) 4 9 Sand (FC S 10; NP) 6 8 Sand (FC S 10; NP) 8 9 Sand (FC = 10; NP) 10 12 Gravelly sand (FC = 5; NP) 12 15 Gravelly sand (FC 5; NP) 14 22 Silty fine sand (FC > 15; NP) 16 28 Silty fine sand (FC > 15; PI=10) 18 31 Silty fine sand (FC > 15; Pl=15) 20 38 Clayey sand (FC > 35; PI=20)