The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall is (A) Vertical if the soil is in an active state of plastic equilibrium (B) Vertical if the soil is in a passive state of plastic equilibrium (C) Inclined at 45° to the vertical plane (D) None of the above

The major principal stress in an element of cohesion-less soil within the backfill of a retaining wall
is
(A) Vertical if the soil is in an active state of plastic equilibrium
(B) Vertical if the soil is in a passive state of plastic equilibrium
(C) Inclined at 45° to the vertical plane
(D) None of the above
by

1 Answer

Answer :

Answer: Option A
by

Related questions

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Last Answer : (B) Minor principal stress is vertical

A retaining wall 6m high supports a backfill with a surcharge angle of 10°. The back of the wall is inclined to the vertical at a positive batter angle of 5°. If the angle of wall friction is 7°, then the resultant active earth pressure will act at a distance of 2 m above the base and inclined to the horizontal at an angle of (A) 7° (B) 10° (C) 12° (D) 17

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Last Answer : (C) 12°

In active state of plastic equilibrium in a non cohesive soil with horizontal ground surface (A) Major principal stress is horizontal (B) Minor principal stress is vertical (C) Major principal stress is vertical (D) Minor and major principal stresses are equally inclined to horizontal

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A cylindrical specimen of saturated soil failed under an axial vertical stress of 100kN/m² when it was laterally unconfmed. The failure plane was inclined to the horizontal plane at an angle of 45°. The values of cohesion and angle of internal friction for the soil are respectively (A) 0.5 N/mm² and 30° (B) 0.05 N/mm² and 0° (C) 0.2 N/mm² and 0° (D) 0.05 N/mm² and 45°

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Rankine's theory of active earth pressure assumes (A) Soil mass is homogeneous, dry and cohesionless (B) Ground surface is a plane which may be horizontal or inclined (C) Back of the wall is vertical and smooth (D) All the above

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The effect of cohesion on a soil is to A) Reduce both the active earth pressure intensity and passive earth pressure intensity (B) Increase both the active earth pressure intensity and passive earth pressure intensity (C) Reduce the active earth pressure intensity but to increase the passive earth pressure intensity (D) Increase the active earth pressure intensity but to reduce the passive earth pressure intensity

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In a counterfort retaining wall, the main reinforcement is provided on the (i) Bottom face in front counterfort (ii) Inclined face in front counterfort (iii) Bottom face in back counterfort (iv) Inclined face in back counterfort The correct answer is (A) (i) and (ii), (B) (ii) and (iii) (C) (i) and (iv) (D) (iii) and (iv)

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Terzaghi's analysis assumes: (A) Soil is homogeneous and isotropic (B) Elastic zone has straight boundaries inclined at = to the horizontal and plastic zones fully developed (C) Failure zones do not extend above the horizontal plane through the base of the footing (D) All the above

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The passive earth pressure of a soil is proportional to (where is the angle of internal friction of the soil.) (A) tan (45° - ) (B) tan (45° + ) (C) tan2 (45° - ) (D) tan2 (45° + )

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If the back fill is having a uniform surcharge of intensity per unit area, the lateral pressure will be (A) q times the lateral pressure within the surface (B) 1/q times the lateral pressure within the surface (C) Equal to a fill of height Z equal to q/r, where r is the density of the backfill (D) None of these

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Pick up the correct statement from the following: (A) The artificial barrier constructed to enclose "n area for safe anchorage, is called break water (B) The smoothened surface at the top end of the vertical face of a guay wall, is called fending (C) The effective berthing lengths of inclined guays can be adjusted (D) All the above

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If vertical angles of inclined sights do not exceed 10° and non-verticality of the staff remains within 1°, stadia system of tacheometric observations are made on (A) Staff normal (B) Staff vertical (C) Staff normal as well as vertical (D) None of these

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The locus of the end point of the resultant of the normal and tangential components of the stress on an inclined plane, is (A) Circle (B) Parabola (C) Ellipse (D) Straight line

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he lateral earth pressure on a retaining wall (A) Is equal to mass of the soil retained (B) Proportional to the depth of the soil (C) Proportional to the square of the depth of the soil (D) Proportional to the internal friction of the soil

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The lateral earth pressure coefficients of a soil, Ka for active state, Kp for passive state and Ko for at-rest condition, compare as : (a) Ko < Ka < Kp (b) Ka < Ko < Kp (c) Ka < Kp < Ko (d) Kp < Ko < Ka

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