RGPV Civil Engineering (Semester 7)
Design of Hydraulic Structure
December 2015
Total marks: --
Total time: --
INSTRUCTIONS
(1) Assume appropriate data and state your reasons
(2) Marks are given to the right of every question
(3) Draw neat diagrams wherever necessary


1(a) Define gravity dam.
2 M
1(b) Explain purpose of galleries in gravity dam.
2 M
1(c) Explain elementary profile of gravity dam.
3 M
Solve any one question from Q.1(d) & Q.1(e)
1(d) Discuss step by step the analytical procedure that you will adopt for analysis the stability of gravity dams.
7 M
1(e) Design the practical profile of gravity dam between RL 200.0m to RL 111.8 m for the following data. Maximum allowable compressive stress in concrete= 3000kN/m2. Maximum reservoir level=200.0m; RL of bottom of dam=100.0m specific gravity of concrete=2.4 , unit weight of water=9.81kN/m3.
7 M

2(a) Explain rock fill dam.
2 M
2(b) Discuss soils suitable for earth dam.
2 M
2(c) Write foundation requirements for earth dams.
3 M
Solve any one question from Q.2(d) & Q.2(e)
2(d) Explain causes of failure of earth dams.
7 M
2(e) An earth dam made of homogeneous material has the following level of top of dam=300.0m level of deepest river bed=278.0m H.F.L. of reservoir=297.5m, width of the top of dam=4.5m v/s slope=3:1, D/S slope=2.1, K=5×10-4 cm/sec. Determine the discharge passing through the body of the dam.
7 M

3(a) Explain breaching section of the dam.
2 M
3(b) Discuss low spillways.
2 M
3(c) Explain effective length of ogee spillway and its determination.
3 M
Solve any one question from Q.3(d) & Q.3(e)
3(d) Describe Ogee spillway with its design procedure.
7 M
3(e) Describe briefly the component parts and their design for a chute spillway.
7 M

4(a) Explain principles of energy dissipation.
2 M
4(b) Discuss the functions of a head regulator.
2 M
4(c) Define flexibility and drive expression for the same.
3 M
Solve any one question from Q.4(d) & Q.4(e)
4(d) Discuss briefly the various types of energy dissipators that are used for energy dissipation below overflow spillways, under different relative position of T.W.C and J.H.C.
7 M
4(e) What is meant by a "cross-drainage works"? Explain the different types of cross drainage works.
7 M

5(a) Draw the plan of run off river plant.
2 M
5(b) Explain capacity factor and reserve capacity.
2 M
5(c) What is a surge tank and what are its types and uses?
3 M
Solve any one question from Q.5(d) & Q.5(e)
5(d) Name various hydro power plants and describe any one in detail.
7 M
5(e)

A load on a hybrid plant varies from a minimum of 10MW to a maximum of 40 MW. Two turbo-generators of capacities 22MW each have been installed . Calculate.
i) Total installed capacity of the plant.
ii) Plant factor
iii) Maximum demand
Iv) Load factor
v) Utilization factor.

7 M



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