Consolidation: Combined Settlement (Koppejan Model)

Question 1

What is the Koppejan Model for consolidation?

Answer 1

A combined formula integrating primary and secondary settlement:

St+∑ (H/Cp+H/Cs)*log(P0+ΔP/P0)

Where:

𝑆𝑡= Total settlement (m)
𝐶𝑝= Primary consolidation coefficient
𝐶𝑠= Secondary compression coefficient

Question 2

Why is the Koppejan model used in practice?

Answer 2

It accounts for both short-term and long-term settlement effects, making predictions more realistic.