Question

By approximate method, the computation of N-component at the time of sudden drawdown condition, the weight is considered as:-
1. Dry unit weight
2. Saturated unit weight
3. Bulk unit weight
4. Submerged unit weight

Answer 1

Correct Answer - Option 2 : Saturated unit weight

Explanation:

Taylor's stability number method:

This is an approximate method for the analysis of the stability of the slope. In this method stability of slope is analyzed with the help of Taylor's stability number which is noted from Taylor's chart on the basis of given values of C, ϕ, and β.

\(S_n = {C \over γ H_c}\)

The unit weight of soil is to be considered in Taylor's stability number as follows;

1. For dry soil, γ = γ_d

2. For saturated soil with the effect of the capillary, γ = γ_sat

3. For submerged soil, γ = γ'

In case of sudden drawdown condition, the unit weight is considered as saturated unit weight.