Civil Engineering
2026 · Paper 1
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Complete GATE CE 2026 Paper 1 overview, original pages and practice · Timed previous-paper practice
Questions 58–60 of 65. Imported answers require review unless explicitly marked reviewed.
Question 58
Open questionCENAT2 marksNeeds review
A group of 25 circular piles is arranged in 5 × 5 uniform pattern in a soft clay soil with equal spacing in both the directions. These are friction piles with negligible end bearing.
Consider the following details:
Diameter of each pile = 1 m
Length of each pile = 15 m
Cohesion of the soil = 20 kN/m
Unit weight of the soil = 16 kN/m
Adhesion factor = 0.75Considering the efficiency of the pile group as unity, the optimum value of the ratio of the pile spacing to pile diameter is ____________________ (rounded off to one decimal place).
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Open questionCENAT2 marksNeeds review
A shallow strip footing of width 2 m is embedded at a depth of 1.5 m below the ground surface in a homogeneous pure clay with an angle of internal friction zero. Consider unit weight of soil as 20 kN/m
and undrained cohesion of soil as 20 kN/m
.Due to rise of ground water table from far below the founding depth to the ground surface in monsoon season, the magnitude of percentage change in the net ultimate bearing capacity as per Terzaghi’s theory is ____________________ (rounded off to two decimal places).
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Open questionCENAT2 marksNeeds review
Traffic is moving on a 6-lane dual carriageway road. Traffic volume per direction during peak hour (08:00 am to 09:00 am) is 600 veh/h. It is assumed that the traffic is distributed uniformly across the lanes in each direction. Just at 08:00 am, a truck goes out of order on the middle lane of one side, thus disrupting the traffic on that lane in one direction. The lane capacity under normal conditions is 200 veh/h/ln and under queue formation it is 160 veh/h/ln. The traffic resumes at 08:30 am on removing the truck from the middle lane. Hourly traffic volume after 09:00 am reduces to 500 veh/h/dir.
The number of vehicles in the queue at 10:00 am is _____ (in integer).
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