Consolidation Settlement

What is primary consolidation in soils?

• • a) A process that occurs due to changes in moisture content

• • b) Compression caused by elastic deformation of soil grains

• • c) Settlement due to the expulsion of pore water from saturated soil

• • d) A process involving only mechanical loading and unloading

Which theory is primarily used to explain one-dimensional consolidation in soils?

• • a) Coulomb’s Theory

• • b) Terzaghi’s Theory

• • c) Darcy’s Law

• • d) Mohr’s Circle Theory

In a consolidation test, the void ratio decreases when:

• • a) Pore water pressure increases

• • b) Effective stress increases

• • c) The soil is undrained

• • d) Temperature decreases

The time rate of consolidation in a soil layer depends on:

• • a) The coefficient of permeability and drainage path length

• • b) The load applied during the test

• • c) The temperature and humidity of the environment

• d) The compressibility of soil particle

Secondary consolidation in soils primarily occurs due to:

• • a) Creep under constant effective stress

• • b) Immediate settlement after load application

• • c) Changes in pore water pressure

• • d) Elastic deformation of soil grains

Pre- consolidation pressure mainly refer to

• a. Over consolidation ratio

• b. Highest stress experience by the soil

• c. Compression index

• d. Void ratio

Over consolidation ratio is greater than 1, generally the soil

• a. Just experienced the new stress

• b. Experienced the highest stress in history

• c. Experienced the same stress