solution5 - CE 728 GEOTECHNICAL EARTHQUAKE ENGINEERING...

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CE 728 GEOTECHNICAL EARTHQUAKE ENGINEERING ASSIGNMENT V SEISMIC SOIL LIQUEFACTION According to given information about equipment and site investigation study the corrected SPT N values are given in Table 1. Note that γ = 18 kN/m 3 and γ w =9.8 kN/m 3 Table 1. Corrected SPT N values Layer # Depth(m) Depth(ft) FC σ v σ v ' C N C R N N 1,60 N 1,60 1 2.9 9.54 16 52.2 31.62 1.79 0.75 8 11.20 11 2 3.6 11.84 12 64.8 37.36 1.64 0.85 12 17.52 18 3 4.7 15.46 10 84.6 46.38 1.47 0.95 8 11.72 12 4 5.5 18.09 11 99 52.94 1.37 0.95 11 15.08 15 5 6.6 21.71 17 118.8 61.96 1.27 0.95 13 16.47 17 6 7.6 25 33 136.8 70.16 1.19 0.95 11 13.1 13 C s = 1.00 , C E =1.05, C B =1.00 Soil Liquefaction Analysis: i.) Seed et al. (1985) CSR = d V V r g a * * ' * 65 . 0 max σ and CRR value is determined from the chart given by Seed et al. (1985) for corresponding corrected SPT N value. The corresponding values are tabulated as follows. Table 2. Liquefaction Analysis by Seed et al. (1985)
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solution5 - CE 728 GEOTECHNICAL EARTHQUAKE ENGINEERING...

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