Refer to Figure 18.23. Given L 1 = 3 m, L 2 = 6 m, l 1 = 1.5 m, = 16.5 kN/m 3

Refer to Figure 18.23. Given L₁ = 3 m, L₂ = 6 m, l₁ = 1.5 m, γ = 16.5 kN/m³, γ_sat = 19.0 kN/m³, and ϕ' = 35°.

a. Find the required depth of the sheet pile, increasing the theoretical estimate by 30%.

b. Determine the force in the tie rods if they are spaced 3 m apart horizontally.

c. Find the maximum bending moment in the sheet pile.

Figure 18.23

A Anchor tie rod L O' F Water Water Sand table oi \c table Y, 6' L2 P Sand Ysat $' Dredge line D L3 E Sand D Y'(K, K) Ysat $' L4 F B.