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GATE CE 2021: Soil Mechanics & Foundation Engineering#16 (App update required to attempt this test)
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Question 1
The ultimate load carrying capacity of a pile to be driven through clayey soils can be determined by using
Question 2
A pre-cast wooden pile is being driven with 50 kN drop hammer having a free fall of 100 cm. Penetration in the last blow of hammer was 0.45 cm. What is the ultimate load carrying capacity of the pile according to ENR formula.
Question 3
A pile of diameter 0.4 m is fully embedded in a clay stratum having 5 layers, each 5 m thick as shown in the figure below. Assume a constant unit weight of soil as 18 kN/m3 for all the layers. Using
method (
= 0.15 for 25 m embedment length) and neglecting the end bearing component, the ultimate pile capacity (in kN) is ________.
method (= 0.15 for 25 m embedment length) and neglecting the end bearing component, the ultimate pile capacity (in kN) is ________. Question 4
Two identical concrete piles having the plan dimensions 50 cm x 50 cm are driven into a homogeneous sandy layer as shown in the figures. Consider the bearing capacity factor INT, for 
.
If QP1 and QP2 represent the ultimate point bearing resistance of the piles under dry and submerged conditions, respectively, which one of the following statements is correct?
. If QP1 and QP2 represent the ultimate point bearing resistance of the piles under dry and submerged conditions, respectively, which one of the following statements is correct?
Question 5
A group of 9 piles, 12 m long and 250 mm diameter, is to be arranged in a square pattern in clay soil with an average unconfined compressive strength of 60 kN/m2. What will be the centre to centre spacing of the piles if group efficiency factor is 1? Neglect the end bearing of piles. Take α = 0.9
Question 6
A group of nine piles in a 
square pattern is embedded in a soil strata comprising dense sand underlying recently filled clay layer, as shown in the figure. The perimeter of an individual pile is 126 cm. The size of pile group is 
The recently filled clay has undrained shear strength of 15 kPa and unit weight of 
square pattern is embedded in a soil strata comprising dense sand underlying recently filled clay layer, as shown in the figure. The perimeter of an individual pile is 126 cm. The size of pile group is The recently filled clay has undrained shear strength of 15 kPa and unit weight of
The negative frictional load (in kN, up to two decimal places) acting on the pile group is _____________
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