Subgrade Compaction

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21:11

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Retaining Walls - Master Series- steps 1-4

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What happens here

Once the trench is excavated and cleared, the exposed virgin soil at the bottom must be thoroughly compacted. This is a critical step to prevent future settling of the retaining wall. Two types of plate compactors are used: a 150-pound plate compactor for lighter, surface compaction, and a much heavier 1000-pound plate compactor for deep, robust compaction that affects the subsoil. The heavier compactor ensures a solid, stable base capable of supporting the weight of the retaining wall. This is a manual, labor-intensive step.

Goal: Achieve dense and stable subgrade at the bottom of the trench to prevent future settling.

Tools and materials

Plate Compactor — Lighter, general compaction or finishing work
Wacker Plate Compactor — Achieving deep and robust compaction of the subgrade in the trench

What they say

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months [Music] now you're gonna notice two different packers that look very similar they're both plate packers one is a 150 pound plate packer and we consider that a finishing packer for very light general compaction needs not going very deep but when we're worried about the soils and especially on the base we use a thousand pound plate packer and either you've already seen that in action or you will see it in action in a moment and this is a beast of a whole another manner it's heavy it's bulky it's self-propelled but that doesn't mean it's easy to maneuver but it's also critical that we use the bigger packer that way we get deeper compaction

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