Refer to Figure 18.9. A cantilever sheet pile is driven into a granular soil where the water table is 2 m (L₁) below the top of the sand. The properties of the sand are ϕ' = 40°, γ = 17.5 kN/m³, and γ_sat = 19 kN/m³. It is proposed to excavate to a depth of 6 m (L) below the ground level. Determine the actual depth to which the sheet pile must be driven (L + D), using the net lateral pressure diagram. Note:

Dactual = 1.3(L₃ + L₄)_theory

Figure 18.9

Transcribed Image Text:

Sand Water table c' = 0 Sand L Ysat L2 c' = 0 Dredge line Slope: 1 vertical: (K, – K,)y L3 E horizontal D F" Mmax L4 F Sand F' Ysat L5 G c'=0 H В (a) (b)