Calculate the change in vertical stress on a drainage pipe caused by a rectangular surcharge of size 2x4m (See figure). Use Westergaard equation. q = 8 T/m? 2 m Well graded sand, SW 6 m Y = 1.90 T/m3...

Extracted text: Calculate the change in vertical stress on a drainage pipe caused by a rectangular surcharge of size 2x4m (See figure). Use Westergaard equation. q = 8 T/m? 2 m Well graded sand, SW 6 m Y = 1.90 T/m3 v = 0.3 Drainage pipe 0.861 T/m2 0.108 T/m2 0.792 T/m2 0.099 T/m2