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Unformatted text preview: Fall 2003 semester 2/2 Question #3: (15 points) a. In a few sentences, discuss and explain what effective stresses in soils are. b. How are effective stresses related to pore pressures? c. In general when seepage is occurring in soil, how can one calculate the fluid pressure at specific locations in the soil? Question#4: (40 points) Consider the soil slope below that makes an angle α with the horizontal. Water is flowing horizontally and when it reaches the free face of the slope, it trickles down the face of the slope. (You can neglect the trickling flow down the face.) a. What is the pore pressure at point P a distance d beneath the free surface? b. What is the hydraulic gradient in the soil? c. What are the magnitude (per unit volume) and direction of seepage forces in the soil? d. If at P, the total vertical stress is given by d γ sat v ⋅ = σ , what is the vertical effective stress at P? α P d=1m...
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- Fall '09
- Environmental Engineering, Department of Civil & Environmental Engineering The University of Iowa, overall seepage force, partially saturated soil, Iowa Fall Semester