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Understanding why soils fail 

The Engineering Hub
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Soil mechanics is at the heart of any civil engineering project. Whether the project is a building, a bridge, or a road, understanding the underlain soils is of crucial importance. This video is a series of several geotechnical videos that will investigate retaining walls, shallow foundations and piles. But before we dive into these geotechnical applications it is important to understand a few basic principles about soil mechanics. This series starts by generic introduction of soil material models. Namely, the Mohr-Coulomb model which is widely used for modeling the strength of brittle materials.
Geotechnical Series Videos:
1. Understanding why soils fail ( • Understanding why soil... )
2. Understanding the Soil Mechanics of Retaining Walls ( • Understanding the soil... )
3. Geotechnical Analysis of Foundations ( • Geotechnical Analysis ... )
4. The Leading Cause of Foundation Failures ( • Residential Foundation... )
References:
[1] D. P. Coduto, M.-c. R. Yeung and W. A. Kitch, Geotechnical Engineering Principles and Practices, Pearson, 2011.

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1 окт 2022

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Комментарии : 70   
@TheEngineeringHub
@TheEngineeringHub Год назад
To further improve the watching experience, we did not include a sponsor in this video. If you enjoyed the video and you feel like we deserve your support, you can check out the link below. Alternatively, clicking like and subscribe or writing a comment also helps a lot. BUY ME A COFFEE LINK: If you enjoy our work, you can buy us a coffee on the link below: www.buymeacoffee.com/engineeringhub
@matthew8505
@matthew8505 Год назад
Heck yeah! I work in retention wall design, so I'm pretty excited for this series
@TheEngineeringHub
@TheEngineeringHub Год назад
That's great Matthew, retaining walls are coming next (in about 2 weeks). Looking forward to your feedback and discussion on that video.
@adaptercrash
@adaptercrash Год назад
No permafrost that's really heavy, you have to dig it mix it then put it back
@xinbaoyu3086
@xinbaoyu3086 Год назад
Great explanation of soil shear strength with easy-to-understand visuals! Job well-done!
@TheEngineeringHub
@TheEngineeringHub Год назад
Thank you Xinbao, positive feedback from our viewers means so much!
@blixten2928
@blixten2928 Год назад
Fascinating and so well-illustrated. You know how to appeal to intuitive understandings so as to make the videos compelling!
@ionelmihai6390
@ionelmihai6390 Год назад
So happy to see videos on geotechnics!
@teg861
@teg861 Год назад
Excellent video series! My group is very appreciative. Feom time to time, we show them to our clients When we need to explain a concept that's hard for them to understand. Thank yiu for imparting knowledge and please continue enlightening the masses.
@faridaismayilova3607
@faridaismayilova3607 Год назад
The animations, explanations of concepts - everything is on point! Thank you!
@TheEngineeringHub
@TheEngineeringHub Год назад
And thank you for taking a second to say this. It means a lot to us 🙏🙏
@histershellac2842
@histershellac2842 Год назад
i am a residential builder and i appreciate these informative videos.
@mohamedkhan4762
@mohamedkhan4762 Год назад
thank you for the intuitive explanation of the soil friction angle. These videos are super helpful.
@TheEngineeringHub
@TheEngineeringHub Год назад
Glad it was helpful! More videos are on the way!
@lavanya1108
@lavanya1108 Год назад
Awesome explanation! Thank you!
@MisterPunisher22
@MisterPunisher22 Год назад
This is wonderful. Thanks for all your work.
@TheEngineeringHub
@TheEngineeringHub Год назад
Thank you so much for the kind words Mister P. Comments like this always keep us motivated to do more!
@Carlos-qz7ul
@Carlos-qz7ul Год назад
Concise, clear and knowledgeable 👌
@emiliodavid5668
@emiliodavid5668 Год назад
Just what I'm looking for, nice explanation keep up with videos of geothecnics applications!!
@TheEngineeringHub
@TheEngineeringHub Год назад
More to come, stay tuned and thanks for the comment!
@ravshanbekmavlonov2996
@ravshanbekmavlonov2996 Год назад
Thanks for the explanation about soil mechanics! Very useful information. Keep up the good working!
@TheEngineeringHub
@TheEngineeringHub Год назад
Thanks Mavlonov, new soils video coming out soon, stay tuned!
@tsormanyamichael1317
@tsormanyamichael1317 3 месяца назад
Very educative.....I want to get deeper understanding in Geotechnical engineering and why foundation fails
@user-xx8qe4qg8y
@user-xx8qe4qg8y Год назад
I think you have explained the concept of soil strength well.
@pedrohenriquecarneiro904
@pedrohenriquecarneiro904 Год назад
Excellent!
@guckfoogle2779
@guckfoogle2779 Год назад
Great video my dude
@miromar3055
@miromar3055 Год назад
Thanks a lot... in just 5mn i learnt what i couldn't learn in my 4 years of engineering degree...
@stephencomino3219
@stephencomino3219 Год назад
Good video. More on slope stability would be helpful for me.
@ajazmahemoodsayyed4122
@ajazmahemoodsayyed4122 Год назад
Amazing sir
@andreabuzzolan9807
@andreabuzzolan9807 Год назад
Very good and clear explanation, I'm studying geotechnics right now and this video is really great. A video about the calculus of elastic and plastic deformation on triaxials would be great 🤪🤣 Keep up the good work 🙌🏼💪🏼
@TheEngineeringHub
@TheEngineeringHub Год назад
Hi Andrea, thanks for the comment. We are very glad you liked the video, we will keep building with more videos and increase the complexity slowly. It might be a bit early for complex stress states and plasticity yet but could come up in the future.
@WeziMuwowo
@WeziMuwowo Год назад
Thank You
@techguy6565
@techguy6565 Год назад
Good animation and explanation
@maximkretsch7134
@maximkretsch7134 Год назад
I work as a geotechnical engineer for a large European construction company and I enjoy such short spot-on videos for in-house training purposes.
@TheEngineeringHub
@TheEngineeringHub Год назад
We are flattered Maxim, thank you so much for your comment! If you enjoyed this video there is a good chance you might find our video on retaining walls also entertaining!
@Martin-iw1ll
@Martin-iw1ll 6 месяцев назад
Andrew Schofield, one of the pioneers of critical state soil mechanics and cam clays recommends people not to use the term cohesion but instead use cementation
@santoshkumarbabar7215
@santoshkumarbabar7215 Год назад
Great value addition Thanks Sir 🙏
@TheEngineeringHub
@TheEngineeringHub Год назад
So nice of you, thank you sir! Your comment is appreciated!
@happy33443434
@happy33443434 Год назад
This channel is highly underated.
@TheEngineeringHub
@TheEngineeringHub Год назад
We are flattered, thank you Victor 🙏
@mohamedosman7495
@mohamedosman7495 Год назад
Good job man, keep going 👍
@TheEngineeringHub
@TheEngineeringHub Год назад
Thanks, will do!
@Martin-iw1ll
@Martin-iw1ll 6 месяцев назад
Shear resistance of a material is normally a third to a half of the the compressive resistance
@kandikatlasrinivas1571
@kandikatlasrinivas1571 Год назад
Nice buddy
@patrickwhalen1770
@patrickwhalen1770 Год назад
Best and simplest explanations without getting bogged down with white board drawings and funny math. Thanks!
@TheEngineeringHub
@TheEngineeringHub Год назад
Thanks Patrick!
@dannygoad5741
@dannygoad5741 Год назад
In the case of post pull out or lift, do you ever consider impact of vacuum created with upward movement of post?
@veramae4098
@veramae4098 Год назад
In Norway a farmer was having some kind of pit dug. The soil was piled up along the bank of a nearby river. And a sheer slide started. Evidently this land, some of the best farmland in Norway, is on top of a layer of clay. When it started sliding the whole layer slid taking, as I remember, about 4 whole farms with it. It is continuing sporadically. I'm still trying to wrap my mind around that. How did that bit of soil piled up on the river bank so destabilize the whole area?
@AaronBrand
@AaronBrand Год назад
I was expecting to hear about the hydrostatic pressure gradient (or some equivalent for saturated soil) affecting the shear stability of a soil medium.
@TheEngineeringHub
@TheEngineeringHub Год назад
That will be coming up in the next videos when we go over slope stability. We felt that it was a bit too early to go too debt into stability.
@GeotechnicalAnuragKapoor79
@GeotechnicalAnuragKapoor79 Год назад
Good way of explanation
@TheEngineeringHub
@TheEngineeringHub Год назад
That means a lot given that is coming from a Geotechnical Engineering Consultancy!
@taretouurio201
@taretouurio201 Год назад
Excellent presentation
@alzou2009
@alzou2009 Год назад
very good explanation. if you don't mind, What kind of program do you use for drawing ?
@TheEngineeringHub
@TheEngineeringHub Год назад
Hi alzou, we use a variety of software. Which drawing are you referring to?
@billynomates920
@billynomates920 Год назад
oh. wasn't the sort of soil failure i was thinking of but extremely interesting all the same
@TheEngineeringHub
@TheEngineeringHub Год назад
Hi Billy, this was an introductory video with broad and technical content. Stay tuned for the geotechnical applications that follow with more specific failure examples.
@Martin-iw1ll
@Martin-iw1ll 6 месяцев назад
In practice, soil would not be able to carry increasing loads, even if well co fined because of firstly the particle crushing and secondly chemical changes due to high pressure
@TheEngineeringHub
@TheEngineeringHub 6 месяцев назад
Yup, you are absolutely right. But those types of stresses would be beyond a structural application.
@fredericotacio3473
@fredericotacio3473 Год назад
where I study people claims that this is the thing to understand
@Veke96
@Veke96 Год назад
Hello nice presentation! But i have one question. If soil is totally dry (no water in voids) shear failure occurs when friction between soil particles is smaller then shear stress in the soil, and that's obvious when you think about it, BUT, what about wet soils or soils that are in groundwater (saturated soils)? Friction now is not intuitive and what is the mechanism of failure then?
@MKowalska
@MKowalska Год назад
As long as the particles in the soil are in contact the friction will be there. What happens in a saturated soil is that the positive water pressure decreases the stress that holds the particles together. This is knows as the 'Terzaghi's law' of effective stress. From the total stress coming from e.g. the total weight of the overburden (the weight of the soil column, including the soil particles and the water between them) we have to subtract the pore water pressure - this resulting stress is the one that is really important. As long as it is larger than zero, there will be some positive shear strength. If the soil is not fully saturated (unsaturated) some suction may exist between the particles - this is then increasing the effective stress and so - increasing the shear strength. The Coulomb-Mohr principle saying that (the shear strength) = (the effective normal stress) * (the angle of friction) holds true for all dry, wet and saturated soils.
@Veke96
@Veke96 Год назад
So if effective stress is zero or very small any vertical load on that saturated soil will cause it to fail in shear?
@MKowalska
@MKowalska Год назад
@@Veke96 Any HORIZONTAL load will shear it. Yes. Unless it is a fine preconsolidated soil (e.g. clay that has been loaded before more than it is now) or very angular coarse soil (sand, gravel). In these cases the shear strength may be increased (up to some effective stress) by 'cohesion' being the effect of interlocking of the grains/particles. In soils the history of loading is important...
@dilipkumarpatel481
@dilipkumarpatel481 Год назад
How much time it takes to make 1 video I hope you'll reply me
@TheEngineeringHub
@TheEngineeringHub Год назад
Hi @dilipkumarpatel481, it ranges from video to video. This one was on the low end and took about 40-50 hours. Other video can take even up to 100 hours if the topic requires a longer explanation and the animations are more complex. Thanks for the comment!
@rainman7992
@rainman7992 Год назад
um, cause they didn't study hard enough and they didn't get any support from their parents...I am right ? what did I win ?
@TheEngineeringHub
@TheEngineeringHub Год назад
hahah love this, one of my favorite comments on the channel for sure! 😂
@vitthalpatange6774
@vitthalpatange6774 5 месяцев назад
The video is made in Hindi and is less understandable in English.😂
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