Laserfiche WebLink
PRECIOSION <br /> • <br /> 2.0 Interpretation <br /> CPT measurements during cone penetration include cone bearing <br /> (q j, sleeve friction (Q, and dynamic pore water pressure (u). <br /> Because these measurements relate to specific soil properties they <br /> can be used to identify soil types. <br /> Soil type interpretation of the collected parameters is represented <br /> in the color tabulation in the following appendix. This <br /> interpretation is based on correlations developed by Robertson et <br /> al, 1989. In this interpretation, friction ratio (Rf) (sleeve friction <br /> divided by cone bearing) and cone bearing are used in the attached <br /> chart to identify soil types. <br /> A general observation of the measured parameters can also be used <br /> to identify soil types. The following table can be used as a <br /> guideline for basic soil type evaluations. <br /> Sand C1 <br /> Cone Bearing (q,,) High Low <br /> Friction Ratio (f,,/g5) Low High <br /> Pore water pressure (u) Low High <br /> Precision sampling <br /> 1400 South 501h Street• Richmond. CA 94804 • (510) 237-4575 • FAX: (510) 237-4574 <br /> _h_tto://www.precisionsamplin�xom <br /> Nationwide Direct-Push Services <br /> 1-800-671-4744 <br />