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Assess Existing Wall and Plan Reconstruction

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21:58
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Building a Failed Boulder Wall

What happens here

Begin by assessing the existing boulder retaining wall to identify failure points. Observe that the current wall uses boulders that are too small, are not properly embedded ('no toe-in'), and are stacked incorrectly, leading to instability. Note any signs of soil erosion or bulging. The presence of a sprinkler system directly watering the wall is also identified as a contributing factor to its failure. This step involves visually inspecting the wall and discussing the engineering principles of a stable retaining wall, such as needing large boulders that are buried deep into the bank to withstand pressure from behind. The video highlights specific instances where rocks are angled incorrectly or are merely stacked, causing them to push out as the dirt settles.

Goal: Understand the causes of wall failure and plan for proper reconstruction.

What they say

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Oh, there's another one. [Music] >> All right. Good morning, one and all. Big boulders means a big retaining wall. Why do we have such big boulders on this one? Uh because whoever had built this wall first kind of used too small of ones and didn't uh put them in there properly and it's starting to fail on the customer. So they want something that's really beefy and is going to last them a long time and is safe. You know, older tenants living here. So, and that's a very typical thing when you guys that's a it's a shortcut that contractors we buy these by the ton, >> right? But we install them by the square foot. And when we buy small boulders by the ton, we can get more square feet because less boulder is going behind. That's not good though because what happens is you call us out for this. Look at that. That fence is jammed >> and it is going to come out a few more feet. So now it's going to be, you know, four to 4 and 1/2 ft tall. But >> Oh god, this is another one of those freickers. >> Yep. So pop the fence out. We'll pull all these boulders out. And again, it's just a matter of, you know, the boulders are angled down. And they're going to put this round one right on top so it can just spit out when everything's getting pushed around. And over here, this one is uh I know there's one really Yeah, you can see instead of putting this one like this would be the face and you would have it buried back deeper into the bank, they just short and skinny stacked it up and now it's actually pushing out and dirt's settling. >> They did it on that one. They did it on that one. They did it on this one. >> So you can see where this is. When you look at a boulder, you're optimizing it for the most square footage of the face. >> Exactly. >> Uh cuz so the a boulder like this should have been laid down to give more meat into the hill so that you don't have cuz we've got the search charge from there's a slope behind it. You got a searchcharge from the the the building itself. And then there's no towin, >> right? >> Look at this. Look at this. There's no tow buried in. >> There's there's zero towin. We're going to give it a good 10 in to a foot. Burying it in. You know, we're going to add some fill to the front, too. So, our initial base will probably be a little, you know, >> how's Timmy getting down here? >> Uh, we're just going to run along the edge here. We're going to start on that end…

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