Cone Penetration Testing (CPT) Data
September 27, 2022
Sources/Usage: Public Domain. View Media Details
The USGS CPT uses a 23-ton truck to push a “cone” into the ground. The weight of the truck is partially supported by both the tip of the cone and the sleeve of the cone. The “tip resistance” is determined by the force required to push the tip of the cone and the “sleeve friction” is determined by the force required to push the sleeve through the soil. The “friction ratio” is the ratio between sleeve friction and tip resistance, measured as a percentage. Soil type and thereby resistance to liquefaction can be inferred from these measurements.
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This research focuses on the ability to determine what areas are more prone to experiencing effects such as liquefaction and landslides when there is shaking from an earthquake.