Question

A 1 m wide continuous footing is designed to support an axial column load of 250 kN per meter of wall length. The footing is placed 0.5 m into a soil with a cohesion of 25 kPa and an angle of internal friction of 5°. Most nearly, what is the value of the Terzaghi bearing capacity factor, N?(A) 0.5(B) 1.1(C) 1.6(D) 7.3

Answer 1

correct option is (A) 0.5

Step-by-step explanation:

given data

axial column load = 250 kN per meter

footing placed = 0.5 m

cohesion = 25 kPa

internal friction angle = 5°

solution

we know angle of internal friction is 5° that is near to 0°

so it means the soil is almost cohesive soil.

and for a pure cohesive soil

`N_(\gamma )` = 0

and we know formula for
`N_(\gamma )` is

`N_(\gamma )` = (Nq - 1 ) × tan(Ф) ..................1

so here Ф is very less
`N_(\gamma )` should be nearest to zero

and its value can be 0.5

so correct option is (A) 0.5