What is the difference between trafficability and mobility?
With which instrument can the cone index be measured?
What is the cone index used for?
Cone-Penetrometer
Cone index (is a mean value) is used to calculate whether it is possible for a heavy vehicle to move on the soil
how much N/m^2 is 1 psi?
draw one curve for cohesive and one for non-cohesive soil in a depth (z in inch) / pressure (pci in psi) coordinate system!
1 psi ≈ 6900 N/m^2 = 69 mbar
How can the Rating Cone Index (RCI) be found in five steps?
What can RCI tell us about the soil?
Take sample
Measurement of the Cone Index in Cylinder (CI_cylinder)
Compaction with 2.5 lbs stamp
for cohesive: 100 drops
for sand with cohesive fractions: 25 drops
Measurement of the compacted Cone Index (CI_50)
Field Measurement of Cone Index (CI)
Remolding Index RI = CI_50 / CI_cylinder
Rating Cone Index RCI = CI * RI
—> shows the strength of the soil after 50 passes of a vehicle
Vehicle Cone Index (VCI) & Cone Index of the soil (CI_soil):
When is it safe to drive over the soil —> 1 or 2?
VCI > CI_soil
VCI < CI_soil
2.
How can the trafficability be determined according to WES?
What are some examples of tracked and wheeled vehicles VCI?
—> trucks (mil gl) are not as good as tanks for offroad trafficability
Last changeda day ago
