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Static Load Test and Observation

5:23
15:04
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At 5:23 in

WHY Retaining Walls FALL down - How Most people Build them Wrong

What happens here

After both boxes are filled with compacted sand (one with geogrid, one without) to the same height, carefully remove the cardboard boxes, leaving two freestanding sand columns. This reveals the initial structural integrity of each column. Then, begin applying static load by placing gym weight plates on top of each sand column. Start with smaller weights (e.g., 2.5 lb, 5 lb) and gradually increase the load, observing how each column responds. The column without geogrid will quickly show signs of collapse, while the geogrid-reinforced column should withstand significantly more weight before failure.

Goal: Demonstrate the increased load-bearing capacity of geogrid-reinforced sand columns.

Tools and materials

  • Cardboard Box — Molds for the sand columns (to be removed)
  • Gym Weight Plates — Applying static load to the sand columns
  • Sand Columns — The objects being tested for stability

What they say

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That's considered a static load. Boom. We have some weights right here which are going to help represent that load. Now, let's see how they do. All right, let's just build up and see how it goes. Guys, I've never done this test before. Putting the same weights. These are 2 and 12 pounders. Now, we got some five pounders. we got a five pounder. It looks like this one's done. Let's take our another five pounder from the done side and put it over here. Let's go with two and a half. Let's go another 2 and 1/2. This is a 25 pounder. That's going to probably bust it. Okay. All right. Let's go. So this will be this is another 25 pounder. Okay. So the weight slid off. Even with the weight sliding off, we were still able to maintain more of the shape on this side than we did with this side. So let's let's keep going. See if we can't get that weight centered onto it. 25. That one's done. Let's just call that what it is, guys. That one's done. That one. Importance of grid. This will demonstrate that we lose some around the edges. But this is where the retaining wall, your actual wall is only containing the edges of the soil. So, ideally, when we put in the right amount of grid and we do it the right way, the soil itself holds itself together and all you've got to do at that point is contain these edges which tend to slough off.

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