Design And Drawing Of Irrigation Structures 952x

H.T.No. Code No: CE1543 GEC-R14 IV B. Tech I Semester Regular Examinations, November 2017

DESIGN AND DRAWING OF IRRIGATION STRUCTURES (Civil Engineering) Time: 3 Hours

Max. Marks: 60 1× 60 = 60M

1. Design a sluice taking off from a tank irrigating 160 hectares at an average duty of 700 hectares/cumecs The earthen dam of an irrigation tank has the following data: Top width of bund

=2m

Side slopes of bund

= 2:1 on both sides

R.L of top of bund

= 128.50 m

Full tank level

= 125.50 m

Max water level

= 126.50 m

Average lower water level

= 123.00 m

Sill of the sluice at off take

= 122.50 m

Good foundation

= 121.50 m

The details of the channel below the sluice are as under Bed level

: 122.00 m

FSL

: 122.50 m

TBL

: 123.50 m

Side slope

:1½:1

Draw i) Longitudinal section along the c.l of the barrel. ii) Half plan at top and half at foundation. iii) Cross section of the tower head and of the rectangular barrel. (OR) 2. Design a regulator cum road bridge with the following particulars: Particulars

Upstream

Downstream

18.0

15.0

Bed width (m)

12

12

Bed level (m)

+50.00

+50.00

Full Supply Level (FSL) (m)

+52.00

+51.75

Top level of Bank (m)

+53.00

+52.75

Top width of Bank (m)

2.0

2.0

Side slopes (H:V)

2:1

2:1

3

Full supply discharge (FSQ)(m /s)

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The regulator carries a roadway single lane designed for IRC loading class 'A'. Provide freeboard of one meter above F.S.L for the road bridge. Assume Hydraulic gradient 1 in 10 General ground level at this site +52.00m Good soil for foundation is available at +49.00m Splayed type wing-walls are to be provided. Draw to suitable scale the following views: i) Half longitudinal section and half longitudinal elevation. ii) Half plan at top and half at foundation level. iii) Sectional elevation through regulator vent. iv) Cross section of wing walls.

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