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Earth-Pressure-and-Failure-Envelope

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m³, what is cohesion of soil?

10 kN/m² 40 kN/m² 20 kN/m² 26.67 kN/m²

Concept:

Critical depth/Unsupported vertical cut (Hc): It is the depth up to which vertical excavation of cohesive soil can stand without any lateral support.

$H_{c} = \frac{4 \times c}{γ \times \sqrt{K_{a}}}$

$k_{a} = \frac{1 - s i n ?}{1 + s i n ?}$

Where

ka = Rankine’s coefficient of active earth pressure

? = Angle of internal friction

γ = Density of soil

c = cohesion

Calculation:

? = 0 for soft clay, γ = 20 kN/m³, H = 4 m

$k_{a} = \frac{1 - s i n ?}{1 + s i n ?}$

$k_{a} = \frac{1 - s i n 0}{1 + s i n 0} = 1$

$H_{c} = \frac{4 \times c}{γ \times \sqrt{K_{a}}}$
$4 = \frac{4 \times c}{20 \times 1}$

c = 20 kN/m²

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An excavation is to be made in a saturated soft clay (ϕu = 0) with vertical sides. What will be the maximum unsupported depth of the vertical cut? Given that cohesion intercept = 30 kN/m2, unit weight of clay = 15 kN/m3

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m³, what is cohesion of soil?

</p><p>An excavation is to be made in a saturated soft clay (ϕ<sub>u</sub> = 0) with vertical sides. What will be the maximum unsupported depth of the vertical cut?</p> <p>Given that cohesion intercept = 30 kN/m<sup>2</sup>, unit weight of clay = 15 kN/m<sup>3</sup></p> <p></p>

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m³, what is cohesion of soil?

In the passive state of cohesionless soil, minor stress is</p>

</p><p>While making the vertical excavation in soft saturated clay

soil caved in at a depth of 4 m. If the unit weight of soil is 20000 N/m<sup>3</sup>

what is the cohesion of the soil?</p> <p></p>

Earth Pressure and Failure Envelope

Foundation-Engineering-Mcqs

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You need to login to ask any Questions from chapter Earth-Pressure-and-Failure-Envelope of Foundation-Engineering-Mcqs

Chapter:

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m³, what is cohesion of soil?

20 kN/m²

All Chapters

Earth Pressure and Failure Envelope

Bearing Capacity

Shallow Foundations

Pile Foundations

Well Foundations

Sub-Soil Exploration and Stabilization of Soils

Stability of Slopes

Similar Question

Guest You need to login to ask any Questions from chapter Earth-Pressure-and-Failure-Envelope of Foundation-Engineering-Mcqs

Chapter:

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m3, what is cohesion of soil?

20 kN/m2

All Chapters

Earth Pressure and Failure Envelope

Bearing Capacity

Shallow Foundations

Pile Foundations

Well Foundations

Sub-Soil Exploration and Stabilization of Soils

Stability of Slopes

Similar Question

</p><p>An excavation is to be made in a saturated soft clay (ϕ<sub>u</sub> = 0) with vertical sides. What will be the maximum unsupported depth of the vertical cut?</p> <p>Given that cohesion intercept = 30 kN/m<sup>2</sup>, unit weight of clay = 15 kN/m<sup>3</sup></p> <p></p>

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m3, what is cohesion of soil?

In the passive state of cohesionless soil, minor stress is</p>

</p><p>While making the vertical excavation in soft saturated clay

soil caved in at a depth of 4 m. If the unit weight of soil is 20000 N/m<sup>3</sup>

what is the cohesion of the soil?</p> <p></p>

Earth Pressure and Failure Envelope

Foundation-Engineering-Mcqs

Guest
You need to login to ask any Questions from chapter Earth-Pressure-and-Failure-Envelope of Foundation-Engineering-Mcqs

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m³, what is cohesion of soil?

20 kN/m²

While making vertical excavation in soft saturated clay, soil caved in at a depth of 4 m. If unit weight of soil is 20000 N/m³, what is cohesion of soil?