Two parallel line loads, 100 kN/m each, are applied at the surface of the backfill soil behind a rigid basement wall as shown in Figure 3.32. This type of loading can be thought of as the load caused...

Two parallel line loads, 100 kN/m each, are applied at the surface of the backfill soil behind a rigid basement wall as shown in Figure 3.32. This type of loading can be thought of as the load caused by the rails of a train while the train is standing still or moving at a constant speed. (a) Calculate the increase in vertical stress at points A, B, C, D, and E. (b) Repeat your solution using the finite element method and assuming that the soil is linear elastic with E = 1 × 10⁷
kPa and ν = 0.3. What is the horizontal stress increase at points A, B, C, D, and E?