Answer: c) Terzaghi
•Terzaghi demonstrated the mechanics of consolidation through the piston and spring analogy.
•He compared the spring-dashpot model with the soil grains, voids filled with water for explaining the mechanism of consolidation.
•Compared to the soil grains & the dashpot, the spring is compared to the soil voids filled with water under stress. The valve represents the drainage face in the previous soil.