Soils

Question 1

What is needed for soil analysis?

Answer 1

Soul gradation curve and Atterberg/consistency limits

Question 2

When the water level goes down below a ground surface what happens to the effective stress?

Answer 2

Effective stress increases
(Water level decrease effective stress decreases)

Question 3

When ground water fluctuates below ground surface stress at any point below the ground table …

Answer 3

Sum of the vertical forces developed at the points of contact on solid particles per unit cross section area of soil is effective stress

Question 4

Is a basement with heavy compaction

Answer 4

Active pressure

Question 5

What a retaining wall moves toward soil backfill the stress condition is called ___ state.

Answer 5

Passive state

Question 6

When OCR is equal to 1 what does that mean? Greater than 1?

Answer 6

Soil is normally consolidated

Over consolidated

Question 7

Clay soils undergo settlement when dewatered (ground water pumping) because the effective stress on the clay _____

Answer 7

Increases