Question

In ____________ method, the freezing pipes are driven below the existing footing and the soil is frozen.

(a) Vibroflotation

(b) Cement grouting

(c) Chemical consolidation

(d) Freezing

The question was asked by my school teacher while I was bunking the class.

I would like to ask this question from Underpinning and its Types in section Scaffolding, Shoring and Underpinning of Construction & Building Materials

Answer 1

The correct answer is:

(d) Freezing

In the freezing method of underpinning, freezing pipes are driven below the existing footing, and the soil around them is frozen to create a temporary barrier. This technique is used to stabilize the soil in situations where other methods, like excavation, might be too risky due to water or unstable conditions.