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GATE 2023 Soil Mechanics & Foundation Engineering Quiz 65

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Question 1

Determine the Hydraulic conductivity of a normally consolidated clay deposit of thickness 3m with one way drainage. The coefficient of volume compressibility is 5.79 x 10-4 m2/kN and coefficient of consolidation is 0.002 cm2/s.

Question 2

A recently constructed building transmits a load of 20 N/m2 on a soil having coefficient of impressibility as 10m2/kN. The thickness of soil deposit is 7m and void ratio is 0.7. What will be ultimate consolidation settlement of this deposit?

Question 3

An elevated structure with 4000kN weight is supported on a tower with four legs. The legs on piers are located at the corners of a square of 6 m side. The vertical stress increment due to this loading at the centre of the structure 7 m below ground level will be _____ kN/m2. (Use Boussinesq’s equation)

Question 4

The vertical stress at point 'P' at a depth of 3 m directly under centre of circular area of radius 2 m and having load intensity 100kN/m2 is _____ kN/m2 (Round off to 1 decimal place)

Question 5Multiple Correct Options

A soil profile at a certain location is as shown in figure. A rigid circular foundation of 4m dia rests on the sand. The contact pressure is 230 kN/m2. The avg. coefficient of compressibility of the clay is 0.65 × 10-3 m2/kN for the stress range encountered. Assume 45º load distribution. Choose the correct statements.

Question 6

A clay layer was subjected to an initial average overburden presence of 100 kN/m2. Thickness of clay layer is 7m, initial void ratio is 0.7. It has a pre-consolidation pressure of 180 kN/m2. What will be the consolidation settlement of the clay layer if recently a 6m building is constructed on this soil? The building is made up of reinforced cement concrete. Take compression index and Re-compression index to be 0.35 and 0.07 respectively.

Report the answer in mm.

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Jul 15ESE & GATE CE