GATE CE 2016 Set 1 — Question 55
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Water Resources Engineering → Canals & Hydraulic Structures → Gravity Dams
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Question
A concrete gravity dam section is shown in the figure. Assuming unit weight of water as 10 kN/m and unit weight of concrete as 24 kN/m, the uplift force per unit length of the dam (expressed in kN/m) at is _________
Correct answer
10490 to 10510
Solution
1.Calculate Uplift Pressures at Key Points:
- Pressure at upstream toe : kPa.
- Pressure at downstream toe : kPa.
- Pressure at drainage gallery (located 10m from P): kPa.
- The diagram is composed of two trapezoids.
- Area 1 (from P to Drain, width = 10m): kN/m.
- Area 2 (from Drain to Q, width = 40m): kN/m.
- Total Uplift Force kN/m.
- This matches the target range [10490, 10510].
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