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Soil sample A is a better backfill material than soil B according to sn value, coarser material generally makes better backfill but particles cannot be too large, and vibroflotation works best below a depth of 2-3 feet where a roller is needed.

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Atiqur Rahman Sakib
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38 views1 page

SN

Soil sample A is a better backfill material than soil B according to sn value, coarser material generally makes better backfill but particles cannot be too large, and vibroflotation works best below a depth of 2-3 feet where a roller is needed.

Uploaded by

Atiqur Rahman Sakib
Copyright
© © All Rights Reserved
We take content rights seriously. If you suspect this is your content, claim it here.
Available Formats
Download as PDF, TXT or read online on Scribd
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According to sn value the soil sample A is a good backfill material and soil sample B is

poor backfill material. So, soil A is Better Than soil B. Coarser material generally makes
better backfill material, however, if the particle size is too large, it can become stuck
between the crater and the vibroflotation apparatus, preventing it from reaching the
desired depth. It should be noted that vibroflotation generally does not work for surface
materials (uppermost 2 to 3 feet of material) and instead a roller is needed to attain
equivalent compaction. THe smaller the value of sn the more desirable the backfill
material.

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