What is the shear strength of soil? I Geotechnical Engineering I TGC Ask Andrew EP 5

What is the shear strength of soil? This is a key question for ground engineers and is vital to any design project. The reason it’s so important is that at some point, everything that is built makes contact with the ground - and transfers load into it. Understanding what influences the strength of a soil and quantifying it, are always the first steps to be taken.
Soil strength is used in soil mechanics to describe the force to be overcome in order to fail a soil by shear. Soil strength depends on many elements, one fundamental consideration being the type of soil. The particles of most soils are essentially incompressible, and soil masses have no tensile strength. Soils fail when one block of soil moves relative to another block and the soil particles at the failure plane move over each other. This is what is known as shear.
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[@sanukalayan619]

This is the only useful video about fundamental soil mechanics on the internet!!!

[@asapmf2030]

You seriously need to do more videos like this, extreeeeeeeemely helpful, intuitively explained

[@propergander1162]

Sandy gravel 😅
Now then ... Seriously just watched your last geogrid vid . I installed geogrid some years back on an embankment for infrastructure . Some years later I built a retaining wall based on a concrete slab for an employer . Watching your vid today I realised that my old employer could have saved a fortune on concrete and carbon using geo grid instead . Well it's tough for my old employer as I didn't remember geogrid and even if I had I would of been discounted for my input All that said I am now starting my own business utilising geogrid and installing geogrid pre cast revetment block driveway and access roads . These save lots of carbon using less concrete and less lorry movements to install product and driveway / road remains pourus with no water run off and it saves on drainage .
Great videos , I love your wisdom and knowledge .
Thank you for sharing 👍👍

[@liamodonnell9091]

This question is from 'Sandy Gravel' :D :D

[@jdtreharne]

I spent so much time trying to find a video that actually explained what the angle of internal friction is. Thank you so much!

[@mykz40]

Best channel iv found so far, Thankyou so much for the informative explanation Andrew!

[@elyorganiev513]

Thanks so much for such a good informative video.

[@timothywhitzell4728]

I'm an apprentice inspector and these videos are all so helpful. Perfectly simplified for the novice. Thanks so much!

[@bettypassion5164]

Thank you very much for such a great piece ☺️☺️

[@bamse7958]

Thanks, this helped consolidate my understanding of the concepts ;)

[@user-kb6xf6yc5e]

simple explanation, thanks a lot!

[@roylyle8222]

So well explained, well done and thank you.

[@mrdjohn21]

`
Thanks, Any plans to make a video on transient loading of ground soils?

[@raihankrenz]

what a great explanation, thank you sirr

[@MitzvosGolem1]

Moisture content in clays affect shear strength very critical.
Excellent lectures.
Thank you.
Cheers.

[@omribgg]

Great explanation thank you very much, would be nice if you could cover this plane on previously consolidated soils and other intersections of the lines with the graph for specific applications,
I would appreciate greatly !

[@Eagle1Golden]

Nice, informative video. Don’t let Brian hold the camera anymore.

[@junerapana]

Just wanted to say these videos have been extremely helpful and so much easier to understand than my coursework haha. Thank you

[@Sooners0561]

Trust me I say the same thing. Some professors knows the materials but cant explain at all

[@baligeyasteven1509]

Great work

[@anarvalehli7995]

Love your videos

[@moazzumgillani4852]

Brilliant!!!! the most epic video I have ever seen,
In this exactly same way, can you explain the cohesion parameter?

[@triplebs3520]

this information just made me understand my earth structure design class. especially the chapter on designing cantilever retaining wall

[@Tensar-Global]

We're glad we could help :)

[@tomrichter244]

Loved the name of the person posing the question " Sandy Gravel"

[@Thegamer77102]

I m from nepal .this video is helpful....

[@ShopperPlug]

make a full course about how to properly design and plan of making a foundation using Geotechnical Engineering important concepts. everyone knows about digging a hole for frost line but noting else than that.

[@LuisRivera-vt1nv]

Any chance to make a video regarding CBR test

[@Mr.G.77]

Would appreciate if you explain it from scour point of view, bridge failure due to scour, etc.

[@pleaseenteraname.2766]

Can i make my own solid cement blocks with lips for interlocking L2xh1xw1
And a layer of tensar geogrid every h1' block?
Thank you Edward

[@Mr.G.77]

Not sure if this is the right place to ask questions, 1) what is bridge scour and explain it from shear stress point of view taking into account layered soils with different soil materials, cohesive and no cohesive, rocks, etc

[@SuGu1915]

Sir..How does adhesion play role in shear strength of soil?

[@gauravgupta5275]

Thanks 😊🙏 sir.

[@invenc]

Good question from Sandy Gravel

[@aininsofiya9144]

Hello Good Day Sir, thank you so much for the explanation. Sir I would like to know is there any possibility that the cohesion value of sand will be completely zero, or the there will be value for cohesion for example like 0.5? Another question, is there any possibility that the cohesion value of sand can be negative for example like -0.5? Thank you Sir 😊

[@manasatawalesu391]

What is the cause of poor ground stability even after compaction?

[@user-oo1zj4fi2u]

Plz can you give me the reference of long term and short term

[@fcrick]

How does a geotechnical engineer decide if a reinforced earth wall or slope needs additional drainage? Often I see reinforced retaining walls built with accommodations for water (gravel, drains) but in steep reinforced geocell slopes this seems less common - how is this need assessed, and what factors are most important?

[@robincheng426]

The lateral earth pressure behind the wall cannot be greater than the allowable stress that the wall can resist. Poor drainage can increase the moisture of the soil behind the wall which may increase the lateral pressure significantly, so this will depend if you need more drainage. Typically, the backfill act as a drainage since the soil is recommended to be granular soils with low fines so it can be compacted easily. You don’t want to put a compactor machine close to the wall (this can break the wall via vibration and is not safe for the operator).
The geocell slopes are typically used as erosion control and not as a wall. Think of it more like a blanket on top of native soil. This is why this does not need drainage as the soil above is native (naturally compacted) and not backfilled as in the case of a MSE Wall.

[@emmyayob5306]

Sir, refer to the graph diagram that you draw about value of c'. Is that mean, it is better the c'=0 or is there any standard of c' that acceptable for foundation design?

[@emmyayob5306]

Thank you, sir. (i'm sorry. i'm forgot to say thank you)

[@civilengineeringtutor8510]

It's better to assume c' is equal to zero when you design , because that will represent the worst case scenario

[@anuplamichhane3892]

0:39 Sandy Gravel

[@mohanbabupm5778]

Ntangible expln

[@ronpflugrath2712]

Saturated it is zero.

[@megankilinski4580]

lol sandy gravel

[@kworthington6696]

Sandy Gravel ha ha