Unit Weight Trends With Cone Resistance In Soft To Firm Clays

Published: Coutinho, R.Q. and Mayne, P.W. (Eds.), Geotechnical and Geophysical Site Characterization 4: Proceedings of the Fourth International Conference on Site Characterization ISC-4, Porto de Galinhas-Pernambuco, Brasil, 17-21 September 2012, Vol. I, CRC Press, Boca Raton, pp. 903-910

17 Sep 2012
Mayne, P.W. and Peuchen, J.

Abstract:
First-order trends for estimating soil unit weight from CPTU data are investigated by examination of data compiled from 19 offshore and 15 soft onshore clays that are Normally-Consolidated (NC) to Lightly-Overconsolidated (LOC). Total unit weights range from 11.5 to 20.5 kN/m3 for these geomaterials. For these NC to LOC soils, the slope of the total (corrected) cone resistance versus depth is linear through the origin and can be represented by the parameter: mq = qt /z (termed the resistance-depth ratio) which decreases with plasticity characteristics. The magnitude of mq is a characteristic of a particular clay deposit and can aid in assessing unit weights of these materials in simple as well as higher-order statistical relationships.

 

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