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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These falls are Simpler, economical and popular. It aims to raise the water level in order to feed the canal.
ENGINEERING DESIGNS-CANAL STRUCTURES GENERAL DESIGN PRINCIPLES
It is a barrier constructed across the river. Down stream Energy Dissipation. This is dummy text. The piers consist of number tiers on which the adjustable gates are placed.
The gates are operated form the top by suitable mechanical device. The discharge is computed using the formula: The water from the under-sluice pocket is made to enter the regulator bays, so as to pass the full supply discharge into the canal.
Suitable up to 60 cumecs and 1. Design — Trapezoidal Notch: Check for Scour depth Check for exit gradient Check for apron thickness due to uplift. The masonry weir wall may be vertical on both face or sloping on both face or vertical on downstream face and sloping in upstream face.
The crest shutters are also provided which hare dropped down during the flood. The hydraulic jump occurs on the glacis causing sufficient hydraulic jump. The gates are then closed. On the upstream side, the wall is extended.
It is a low weir constructed at the end of cistern, working on the principle of horizontal impact for energy dissipation. But in case of a barrage, the. Again some piers are constructed on the down stream side of the canal head to support the roadway. When there are piers Bt will be reduced as Bt – 0. Such a head-works consists of:.
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Design Of Hydraulic Structures ~ Civil Engineering Study Materials for GATE IES SSC JE PSUs
Masonry weir wall is constructed over the impervious floor. A typical layout of a canal head-works is shown in figure below. Meter and non-meter falls Required Basic Data: The impervious floor and the. The boulders are grouted weig.
Published by Lance Grime Modified over 3 years ago. But then, this is dummy text. Share buttons are a little bit lower. Down stream glacis 4. The choice between a weir and a barrage is largely governed by cost and convenience in working.
Transition lengths on upstream and downstream. The under sluices are the openings provided at the base of the weir or barrage.
ENGINEERING DESIGNS-CANAL STRUCTURES GENERAL DESIGN PRINCIPLES – ppt video online download
My presentations Profile Feedback Log out. Site plan with contours showing the flow direction. To bring the velocity with in the permissible velocities, falls or drops are introduced at suitable locations.
The crest shutters are provided to raise the water level, if required. Sloipng nature of the fish varies from type to type. It consists of a number of piers which divide the total width of the canal into a number of spans which are known as bays.
Accordingly, it is difficult to figure out when to end it. The following are main components: Bearing capacity of the foundation strata. A platform is provided on the top of the piers for the facility of operating the gates. Throat width of drop wall, Linear water way Design of Stilling Basin: The muddy water flows towards the downstream through the scouring sluices. The boulders are grouted properly with cement mortar. Rivers are important source of fishes.
The maximum height of these gated seir, called head sluices will be equal to the difference of Pond Level glaacis Crest Level of the regulator. 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. It is a modern fall, a Straight gllacis generally with a slope 2: