topic 8 GEO

Question 1

Differentiate under consolidated, normally consolidated and over consolidated soil.

Answer 1

1. Under consolidated: preconsolidation pressure less than effective stress
2. Normally consolidated: preconsolidation pressure equal effective stress
3. Over consolidated: preconsolidation pressure more than effective stress

Question 2

State four (4) causes of differential settlement.

Answer 2

1. The soil profile may not be uniform across the site
2. The ratio between the actual load and the design load may be different for each column
3. The ratio of dead to live load may be different for each column
4. The as-built foundation dimensions may differ from plan dimensions