Design of Hydraulic Structures - May 2015

Civil Engineering (Semester 8)

TOTAL MARKS:
TOTAL TIME: HOURS

1 (a) Discuss factors governing the selection of type of dam.(7 marks) 1 (b) i) Write a brief note on 'Arch dam'.(4 marks) 1 (b) ii) Enumerate various factors deciding location of canal fall.(3 marks) 2 (a) Discuss various external forces acting on a gravity dam.(7 marks) 2 (b) Describe hydraulic and seepage failure of earthen dam.(7 marks) 2 (c) Classify spillways and discuss any one in detail. Give essential requirements of Spillway.(7 marks) 3 (a) Describe the method used for analyzing stability of slope of an earthen dam.(7 marks) 3 (b) Describe design features of chute spillway.(7 marks) 3 (c) Discuss seepage control in earthen dam.(7 marks) 3 (d) An overflow spillway with its upstream face vertical is to be design for a flood of 7200 cumec. Height of spillway crest above river bed is 52 m. The end walls of spillway are 75 m apart and there are 5 piers, each 2 m wide. Determine total head over the crest of spillway. Take C = 2.2, Ka = 0.10 and Kp = 0.01. Also draw spillway profile.(7 marks) 4 (a) Explain various modes of failure of gravity dam.(7 marks) 4 (b) Discuss measures to control seepage through earth dam and their foundation.(7 marks) 4 (c) Write a short note on inspection galleries and contraction joints in gravity dam.(7 marks) 4 (d) Explain analytical method for stability analysis of a gravity dam.(7 marks) 5 (a) Describe various energy dissipation devices used below spillway in relation to the position of jump height curve (JHC) and tail water rating curve (TWRC).(7 marks) 5 (b) Describe the procedure for designing a head regulator for distributary.(7 marks) 5 (c) Describe with neat sketches various types of bucket type energy dissipaters.(7 marks) 5 (d) Explain stepwise procedure for designing a Sarda type fall.(7 marks)