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Stesso

Lid Preparation and Backfill Compaction

8:03
15:20
87.3K views

At 8:03 in

Working on an underground Vault lid at a Commercial Excavation site

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What happens here

Workers use an angle grinder with a wire brush attachment to clean the edges of the concrete vault lids, removing old sealant and debris to ensure a proper seal for the new weatherstripping. Brad, the worker, then explains the process of backfilling, mentioning that excavated soil is hauled off-site and later returned as 'good clean fill sand.' He also clarifies that compaction is done to 95% Standard Proctor Density for green areas, but would require 100% under a building pad, using a plate packer for proper density.

Goal: Observe the preparation of vault lids and understand backfill compaction standards.

Tools and materials

  • Angle Grinder Milwaukee — Cleaning concrete edges
  • Clean Fill Sand — Backfilling the trench
  • Plate Packer — Compacting backfill to specified density
  • Wire Brush Attachment — Cleaning and preparing surfaces

What they say

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they're insulating over the top of that hey brad where did your excavation spoils go to back to the shop okay so you you calculated into the bid to haul it all off and then you got to haul it all back yeah how many yards was it ah it was 22 truckloads 14 yards of load so how are you going to compact it when you put it back packer just uh just a thousand pound plate package yeah in this case you wouldn't use your roller packer because that's just too much yeah especially on top of the vault isn't it yep we don't need it it's all in a green area we'll have good clean fill sand coming back again 95 95 okay so in case you guys don't know what that means 95 standard proctor density in a green area is what you want to go to if it was underneath the building pad what is it is it 99 brad underneath the building pad is 100 it's 100

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