8. Retaining Walls

Thats why i prefer to use the upside down T instead of L ..

Channel needs a new narrator before I'll watch.

Oh wow this was one of the best videos on retaining walls.

The inward wall wins because there is less space at the bottom which means less pressure AND some of the weight is clamping down on the wall further holding it in place. The lighter pressure atop isn't strong enough to overcome the lever shape at the bottom where the pressure is absolutely highest.

Lets see it from above: "L" are the materials of the containing wall and "+" is the thing being contained. The "(L)" is a containing wall part that is covered from above by the thing being contained. "-" are natural containers.

Inverted L type containing wall:

----------------------------------------
LLLLLLL ++++++++++++
LLL +++++++++++
LLL +++++++++++
LLL +++++++++++
LLLLLLL ++++++++++++
----------------------------------------

L type containing wall:

----------------------------------------
LLL(L)(L)(L) +++++++++
LLL ++++++++++++++++
LLL ++++++++++++++++
LLL ++++++++++++++++
LLL(L)(L)(L) +++++++++
----------------------------------------

Despite the second option has the additional pressure force that keeps the friction, I think it is easy to see, this way, that the second one is way more unstable than the first one with approximately the same amount of materials (it has one L less in the covered part because the brackets already make it wider). Why? The second one needs surface to keep the pressure going. In this model, we can do two things: moving away the turning point which as effective as it is said in the video, or putting it the other side to keep the friction using the contained material pressure. The bad thing is that, with the same amount of material and this new shape, we can move the turning point really far away, or try to get a few pressure using the inverted one. In this video, a lot of material is being wasted in the middle of the inverted L, when it could be used in the way I show.

Anyways, this is just an observation and I'm no expert, so I may be wrong. Please, correct me! I dont try to criticize the video, it just shows a reality, but I wanted to add this possibility

It still requires the L to stay in one piece and not break at the corner.

interesting wall concept...
why not...use a upside down T shaped wall??? 🤔🤔🤔
🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣🤣

Cool 👍

What about a T shaped wall? Will the horizontal bit be shorter than for an L to withhold the same pressure? Or a cross.. so the sum of three lower bits vs one of L?

As a builder When a retaining wall in built leaning in ( out of plumb) it's much stronger .

Do I know mo?? Sweet home Alabama movie..a Yankee and a democrat

Here's another question: Why L? Why not a T?
Seems like a T woule hole better and resist the Overturn much more...?

After watching this video
All of us - “look at me, Im the engineer now.”

I love the Engineering behind all structures. From basic engineering to the extreme complex engineering.
I lose track when it gets Into deep equations, I get a lot better understanding by watching videos than trying to read the equations.
Thanks, keep going with even more in depth videos.

good video

Please make a video on Gabion also.

Good illustration

Very interesting video, but could someone give some examples of where you would need a retaining wall vs a normal wall?

Build the retaining wall with shear key.. can achieve more Ms force… perhaps he is too rush to explain about this

Awesome video! I wish I had these videos during college

This is what i was looking for. Thanks sir

The Ole step on a rake theory lol

Question 1, toe out/you in depends on the weight of the material of the wall and the weight if the infill …

Great explanation of how the forces acting on a retaining wall work under 5 minutes.

Thank you very much

interesting.. it's sad how I already knew this but interesting

Damn I wish schools were teaching like this!

I don't know why this got recommended to me but it is in fact interesting

From the thumbnail I thought the marbles were minions

weight

Why is this like an elementary collage class?

Thanks. Am now an engineer.

What about T shaped walls? Wouldnt they be even better?

damn thought those were minions before i clicked :D:D

In before someone makes a T shape wall.

Just use reinforced soil

I was wrong but not disappointed.

Ah yes, watching physics videos after graduating with a failed physics subject

I thought it was minions and not marbles..

Jerry, these are load bearing walls!

why not put it like letter T instead

i thought this was common sense - you have soil or mass guaranteed on one side to help weigh it down...also if you needed additional supports to retain the structure of the wall they can be hidden.
i guess an upside down T may offer additional support but i assume the ammount of addition support is minimal so is not needed

Good explanation, but I’d like to hear more.

My girlfriend has an amazing stabilizing leg

well why not introduce T shaped walls? I know mindblown...