Bearing Capacity Flood- Proof and Frost Proof: Frost and Thaw Effects

Question 1

What is frost heave?

Answer 1

The upward movement of soil due to freezing water expanding in soil pores.

Question 2

How does thawing affect soil stability?

Answer 2

Frozen soil loses strength when thawed, leading to road deformation and settlement.

Question 3

What is the frost depth equation?

Answer 3

hv=α×I

Where:

ℎ𝑣= Frost penetration depth (m)
𝛼= Surface insulation factor
𝐼= Frost index

Question 4

How does frost depth differ between coastal and inland areas?

Answer 4

Coastal areas have less frost penetration due to moderate temperatures.

Question 5

How can frost-thaw damage be prevented in roads?

Answer 5

1. Use frost-resistant materials like sand or gravel.
2. Ensure proper drainage to prevent water accumulation.
3. Design pavement layers to resist freeze-thaw cycles.