I have a situation where the soil at the base of the sheeting is sloping down and away from the base at a 3:1 (3 horizontal, 1 vertical) slope. How can this be modeled in SPW 911?
It depends very much on the ground. • In cohesionless soils, you could draw a line from the bottom of the wall at an angle of phi (angle of internal soil friction) to the horizontal. Draw a horizontal line from where this meets the slope on the passive side back to the wall. The distance from this point to the original point (where the soil meets the wall) is the height “X” which you can ignore. • With cohesive soils, the problem is not so acute, where the shear strength is much higher. Some provisions would probably need to be made in the case of soft clays, but it would be up the judgment of the engineer.
