Hydraulic Structures
Paper Code: CE 705
Diversion Head works:
Necessity, Difference between weir and Barrage, Type of Weirs, Selection of site , layout and description of each part, Effects of construction of a weir on the river regime, causes of failure of weirs on permeable
foundation and their remedies, Regulation and silt control at head work.
Theories of seepage and Design of weirs and Barrages: Failure of Hydraulic Structures Founded on Pervious foundations: I) By piping ii) By Direct uplift, Bligh’s creep theory of seepage flow, Khoslas theory & concept of flownets, concept of exit gradient and critical exit gradient, Khosla’s method of independent variable for determination of pressures and exit gradient for seepage below a weir or a barrage, necessary corrections, examples.
Hydraulic structures for canals: Canal falls – necessity, locations, various types and description of each type, Head regulator and cross regulator- location, description, Cross-Drainage Works: Necessity, types, selection of a suitable type, Description of each type Design consideration – in brief.
Dam (General): Definition, classification of Dams, factors governing selection of type of dam , selection of suitable site for a dam, Salient features of important dams of India.
Earthen Dams: Introduction, Types of Earthen Dams, Methods of Construction, Causes of failure, Design Criteria, Determination of line of seepage or phreatic line in Earthen Dam, stability of u/s and d/s slopes,
seepage control in Earthen Dam, Design of filters, slope protection, examples.
Gravity Dam: Definition, Typical cross- section, Forces acting on Gravity Dam, Combination of forces for design, Mode of failure and criteria for structural stability of Gravity Dams, Principal and shear stresses.
Elementary profile of a Gravity Dam, Concept of High and low Gravity Dam, Profile of a Dam from Practical consideration, Design consideration of Gravity Dam- in brief. Foundation treatment of Gravity dam: Examples.
Spillways, Engergy Dissipators and Sillway Gates: Introduction, Location, Essential requirements, spillway capacity. Components of spillway, Controlled and un-controlled spillways, various types of spillways description of each type in brief, Energy Dissipation below overflow spillways- Hydralic jump formation, stilling basins, spillway crest Gates- various types and description: Examples.
Reference:
- Irrigation Engineering and hydraulic structures By Santosh Kumar Garg. Khanna Publishers.
- Irrigation , water Resources and Water Power Engg. – By Dr.P.N. Modi,Standard Book House. Post Box: 1074- Delhi-6
- Water Resources Engineering Principle and practice By Satya Narayana Murthy Challa. New Age ,Internation (P) Ltd. Publishers. New delhi, Bangalore, Chennai , Hyderabad, Kolkata, Lucknow , Mumbai.
- Design of Small Dams. United States Department of the Interior Bureau of Reclamation.
- Concrete Danms- By- R.S. Varsney , Oxford & I & H Publishing Co. New Delhi, Bombay , Calcutta.
