Types of weirs. (a) Masonry weirs with vertical drop. (b) Rock-fill weirs with sloping aprons. (c) Concrete weirs with sloping glacis. Masonry. Types of Weirs. (a) Masonry weirs with vertical drop. (b) Rock-fill weirs with sloping aprons. (c) Concrete weirs with sloping glacis. Lecture structure on pervious foundation- Khosla’s theory-. Design of concrete sloping glacis weir. ❑Weir or barrage is constructed across a perennial river to raise.

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The intermediate spaces between the core walls are filled up with boulders maintaining a slope of 1 in The object is three fold: To with stand the impact of the high velocity jet to dissipate the energy.

The works, which are constructed at the head of the canal, in order to divert the river water towards the. Hence there is a limiting surface slope in the canal. Falls are combined with regulators, bridges, and escapes.

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Down stream Energy Dissipation. The gates are then closed. The following are main components: The hydraulic jump occurs on the glacis causing sufficient hydraulic jump. When there are piers Bt will be reduced as Bt – 0. My presentations Profile Feedback Log out.


When the silt deposition becomes appreciable the gates are opened and welr deposited silt is loosened with an agitator mounting on a boat. It is a simple fall broad crested weir with high raised sill, The nappe impinges into the water cushion below There is no hydraulic jump and the energy dissipation is brought about by the turbulent diffusion, as the high velocity jet enters the deep pool of water down stream.

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Design Of Hydraulic Structures ~ Civil Engineering Study Materials for GATE IES SSC JE PSUs

Trapezoidal Notch falls Required Basic Data: Such a head-works consists of:. The under sluices are the openings provided at the base of the weir or barrage. Canal fall skoping drop: Feedback Privacy Policy Feedback. TPs Particulars, taken up to hard strata or to a minimum depth of 2m below CBL or ground level which ever deeper with soil classification.


Invert level of the cistern Length of the basin Level of end sill And other components. But in case of a barrage, the.

A platform is provided on the top of the piers for the facility of operating the gates. Thus the invert level of the cistern be kept at 1.


Tweet Share Share Share Share. Throat width of drop wall, Linear water way Design of Stilling Basin: The crest shutters are also provided which hare dropped down during the flood.

The muddy water flows towards the downstream through glacsi scouring sluices. These drops can be meters. Sloping glacis if any.

The discharge for one notch is computed and the number of notches designed by trial and error method considering full slkping discharge and half supply discharge The piers consist of number tiers on which the adjustable gates are placed. Now-a-days, the weir is constructed with reinforced cement concrete. About project SlidePlayer Terms of Service. Momentum Principles in Open-Channel.

The discharge is computed using the formula: Sheet piles are provided below the cut off walls. A typical layout of weie canal head-works is shown in figure below. Selection of Site for Diversion Head Works. Auth with social network: