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GATE CE 2021: Soil Mechanics & Foundation Engineering#17 (App update required to attempt this test)

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Question 1

An elevated structure is supported on a tower with 4 legs. The legs rest on piles located at the corners of a square 6m on a side. Total weight of structure is 8000 kN. What is the vertical stress increment due to this loading at a point 6m beneath the center of the structure ?

Question 2

A tower is constructed on a circular raft 6 m in diameter at a depth of 3 m below ground level in sand having bulk unit weight of 21 kN/m3. The gross intensity of pressure at the base of the raft is 140 kN/m2. What will be the increase in vertical stress (in kN/m2) due to raft at a point 4 m beneath the centre of the raft?

Question 3

The load from a continuous footing of 2m width, which may be considered to be a strip load of continuous length is 190 kN/m2. The magnitude of vertical stress at a depth of 1.2m below the centre footing level is kN/m2

Question 4

Consider a square-shaped area ABCD on the ground with its Centre at M as shown in the figure. Four concentrated vertical load of P=5000 kN are applied on this area, at each corner.

The vertical stress increment (in kPa, up to one decimal place) due to these loads according to the Boussinesq's equation, at a point 5 m right below M, is_____

Question 5

For a sand embedded in homogeneous clay strata with vertical concentrated loading of 60kN/m2, the radius to depth ratio is 0.3. Determine the vertical stress corresponding to the Influence factor of 0.248. Take z= 2m

Question 6

A raft foundation of size 15m x 8m is loaded with a uniform load of 112 kPa. Determine the vertical stress at point A at a depth of 5.0m if the number of area unit of the Newmark chart is 90. Take influence coefficient as 0.005.
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Nov 2ESE & GATE CE