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Earth-Pressure-and-Failure-Envelope

An excavation is to be made in a saturated soft clay (ϕ_u = 0) with vertical sides. What will be maximum unsupported depth of vertical cut?

Given that cohesion intercept = 30 kN/m², unit weight of clay = 15 kN/m³

5 m 8 m 6 m 4 m

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:

Given, ?u = 0, c = 30 kN/m2, γ = 15 kN/m3

$k_{a} = \frac{1 - \sin ? 0^{?}}{1 + \sin ? 0^{?}} = 1$

$H_{c} = \frac{4 \times 30}{15 \times \sqrt{1}} = 8 m$

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A wall 6 m high has a smooth vertical back and retained sand as a backfill that is submerged. The sand has Ysat = 20 kN/m3 and ϕ = 30º. The total active earth pressure is

An excavation is to be made in a saturated soft clay (ϕ_u = 0) with vertical sides. What will be maximum unsupported depth of vertical cut?

Given that cohesion intercept = 30 kN/m², unit weight of clay = 15 kN/m³

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/m3, what is the cohesion of the soil?

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

A wall 6 m high has a smooth vertical back and retained sand as a backfill that is submerged. The sand has Y<sub>sat</sub> = 20 kN/m<sup>3</sup> and ϕ = 30º. The total active earth pressure is</p>

An excavation is to be made in a saturated soft clay (ϕ_u = 0) with vertical sides. What will be maximum unsupported depth of vertical cut?

Given that cohesion intercept = 30 kN/m², unit weight of clay = 15 kN/m³

</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>

</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>

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

Chapter:

An excavation is to be made in a saturated soft clay (ϕ_u = 0) with vertical sides. What will be maximum unsupported depth of vertical cut?

Given that cohesion intercept = 30 kN/m², unit weight of clay = 15 kN/m³

8 m

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:

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

8 m

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

&nbsp;A wall 6 m high has a smooth vertical back and retained sand as a backfill that is submerged. The sand has Y<sub>sat</sub> = 20 kN/m<sup>3</sup> and ϕ = 30º. The total active earth pressure is</p>

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

</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>

</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>

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

An excavation is to be made in a saturated soft clay (ϕ_u = 0) with vertical sides. What will be maximum unsupported depth of vertical cut?

Given that cohesion intercept = 30 kN/m², unit weight of clay = 15 kN/m³

A wall 6 m high has a smooth vertical back and retained sand as a backfill that is submerged. The sand has Y<sub>sat</sub> = 20 kN/m<sup>3</sup> and ϕ = 30º. The total active earth pressure is</p>

An excavation is to be made in a saturated soft clay (ϕ_u = 0) with vertical sides. What will be maximum unsupported depth of vertical cut?

Given that cohesion intercept = 30 kN/m², unit weight of clay = 15 kN/m³