DBPapers
DOI: 10.5593/SGEM2015/B12/S2.041

ESTIMATION OF SOIL MOBILITY USING THE FALL CONE TEST

C.Y. Chen, Y.Z. Zheng
Friday 7 August 2015 by Libadmin2015

References: 15th International Multidisciplinary Scientific GeoConference SGEM 2015, www.sgem.org, SGEM2015 Conference Proceedings, ISBN 978-619-7105-32-2 / ISSN 1314-2704, June 18-24, 2015, Book1 Vol. 2, 307-314 pp

ABSTRACT
In this study, we used the cone method to assess slope soil mobility under rainfall-induced high water content conditions. The cone penetrometer has a standard cone tip of 30o, cone mass of 80g or 240g, follows a free fall manner, and a cone tip contact with the soil surface and penetration into soil within 5 seconds. Soil moisture with a penetration depth, 20mm, is defined as the soil liquid limit. Test results of soil plastic limit and liquid limit by the cone method are compared with the traditional Atterberg limit test, slump test, slump flow test, V-funnel test, and L-type flow test. Results of the analysis show that the test results are poor by traditional Atterberg test and the cone penetrometer method for water content is lower than 18%. Cone method with cone mass 80g will not be able to evaluate soil liquid limit at a penetration depth below 20 mm. Cone penetrometer is changeable for both cone mass 80g and 240g but limited by cone length and is not suitable for high water content soil. Results of the analysis show that the penetration depth of the cone penetrometer is proportional to the results of the soil slump flow test. It is available to evaluate slope soil’s mobility using the cone method.

Keywords: cone penetrometer, soil mobility, Atterberg limits