Theory of seepage,Piping,Uplift pressure||by Civil Engineering

Weir is hydraulic structure constructed across the width of the river to raise its water level so that a fraction of flow of the river can be diverted into the canal irrigation network.
Following are the 2 causes of failure of a weir.
1- By surface flow- Due to excess turbulence discharge the weir can be fail during the time of flood.
2-By subsurface flow condition- Due to water seeping below the base of the floor of the weir the failure of the floor can be caused.
The subsurface flow will cause the failure of the floor due to the following 2 conditions.
By piping/Undermining-
If the water percolating below the foundation has sufficient force when it emerges at the downstream end of the impervious floor it may lift up the soil particles at the end of the floor.
This process of erosion extends backward towards the upstream side and result in the Removal of the soil and developing pipe like formation below the floor.
The floor may subside in the vacant space and fail which is known as failure due to piping or undermining.
Following steps should be taken to prevent the failure due to piping or undermining.
A- Providing sufficient length of the impervious floor so that the path of the percolation is increased and exit gradient is reduced.
B- Providing piles at the upstream and downstream ends of the impervious floor.
*By uplift pressure-
The water percolating below the foundation exerts an upward pressure on the impervious floor which is known as uplift pressure.
If the uplift pressure in not counterbalanced by the weight of the floor then it may fail by rupture.
Following steps should be taken to prevent failure due to uplift pressure.
A-Providing sufficient thickness of the impervious floor.
B-Providing pile @ U/S end of the impervious floor so that uplift pressure is reduced on the downstream side.
Theory of seepage
Failure of weir
What is piping
What is undermining
What is uplift failure
What is piping failure
What is undermining failure
Prevention of undermining
Prevention of piping
Prevention by uplift pressure failure
Bligh creep theory
Khosla creep theory
Lane weighted creep theory
Thanks for watching
By Civil Engineering
civil engineering
#irrigation
#civilengineering

[@parinithramakrishna4084]

Bhai bahut accha tha. Tik tak smaj me aya.

[@vipultiwary5596]

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[@Nikinjnchavda]

Please upload more videos of Geotechnical engineering

[@shreyasjoshi4474]

Well described mannn!!!👍

[@devanshmishra1249]

Thanks sir waiting for the next.

[@ABHISHEKKUMAR-tg3mp]

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[@er_sharique]

Sir plzz..
Complete irrigation Engineering...

[@ABHISHEKKUMAR-tg3mp]

You have a Desi own style

[@harjitAhir]

Surface flow ka nahi he sir

[@aresunobhai6590]

Hello sir