SELECT VisCPT VIDEO CLIPS
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TREASURE ISLAND
In each of the video clips below, the VisCPT is advanced in several 5 cm increments. A short pause between advances allows for observation of soil movement during excess pore water pressure dissipation. Such movement occur only in relatively loose cohesionless soils. Thus, the movements can be related to a soils' susceptibility to liquefaction.
Two types of motion are observed:
1) Piping of fines through the pore channels of a coarser soil
skeleton,
2) Mass movement of loose relatively uniform soil.
Click on each still image to watch
a short video clip
(an ".mpg" file player is needed).
UM26-1 soil piping - note the
stationary coarse particles
UM26a-2 soil piping - very dramatic, clearly a loose soil
UM26b-1 mass movement - short duration
UM25-2 mass movement (after last advance only)
UM25a-1 mass movement (unusual horizontal flow)
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