Question

105 ft EL 260.3 ft Concrete Spillway Reservoir EL 190.0 ft EL 200.3 ft EL 180.0 ft Aquifer ▼EL 150.0 ft k = 0.01 cm/s EL 105.0 ft Impervious Layer

Using a flow net,

(a) Determine the maximum exit gradient for the seepage conditions;

(b) If the silty sands have a saturated unit weight of 115.0 lb/ft3, calculate the FOS against piping;

(c) Calculate the FOS against heave;

(d) Is the FOS against piping and heave adequate?

Answer 1

E 260.2 2: 60 i 2-2.OO.3ニGO ニ

Ent aadent 14 Nd EXL卜ー込ー 6. 667 62.Y lc equnte 0.842