GATE CE 2017 Paper 1 — page 16

Questions 46–48 of 65. Imported answers require review unless explicitly marked reviewed.

It is proposed to drive H-piles up to a depth of 7 m at a construction site. The average surface area of the H-pile is 3 m

per meter length. The soil at the site is homogeneous sand, having an effective friction angle of 32°. The ground water table (GWT) is at a depth of 2 m below the ground surface. The unit weights of the soil above and below the GWT are 16 kN/m

and 19 kN/m

, respectively. Assume the earth pressure coefficient,

, and the angle of wall friction,

. The total axial frictional resistance (in kN, up to one decimal place) mobilized on the pile against the driving is

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The infinite sand slope shown in the figure is on the verge of sliding failure. The ground water table coincides with the ground surface. Unit weight of water

kN/m

Diagram for Civil Engineering question 47

The value of the effective angle of internal friction (in degrees, up to one decimal place) of the sand is

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A sluice gate used to control the flow in a horizontal channel of unit width is shown in the figure.

Diagram for Civil Engineering question 48

It is observed that the depth of flow is 1.0 m upstream of the gate, while the depth is 0.2 m downstream of the gate. Assuming a smooth flow transition across the sluice gate, i.e., without any energy loss, and the acceleration due to gravity as 10 m/s

, the discharge (in m

/s, up to two decimal places) passing under the sluice gate is

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2017 · Paper 1

Question 46

Question 47

Question 48