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http://dx.doi.org/10.9719/EEG.2017.50.2.145

Study on Shear Strength Using a Portable Dynamic Cone Penetration Test and Relationship between N-Nc  

Kim, Hyukho (Kwater)
Lim, Heuidae (Department of Civil Engineering, Chungnam National University)
Publication Information
Economic and Environmental Geology / v.50, no.2, 2017 , pp. 145-157 More about this Journal
Abstract
Because of Recent intensive rainfall, nationally landslides and slope failure phenomenon has been frequently occur. Providing proposed-measures to the natural disasters that occur in these localities and the slope, must be derived ground of strength parameters(shear strength) as a design input data. However, it is such as extra deforestation and a lot of economic costs in order to make the access to the current area and the slopes ground survey is required. Thus, by small dynamic cone penetration test machine using the human to carry in the field, it is possible to easily measure the characteristics and strength constant of the ground of more than one region. In this study through researching analysis of the domestic and foreign small dynamic cone penetration test method, it has proposed a cone material and test methods suitable for the country. Cone penetration test Nc in the field has comparated with analysis of the value and the standard penetration test N value. And, in addition to this, direct shear test and borehole shear test were performed by depth, bedrock, and soil type and passing #200 and the correlation of the Nc value. In particular, in the present study, for the sandy soil that has distict distribute in mountain, it is proposed relation of shear strength corresponding to the Nc value (cohesion and internal friction angle) in order to calculate such effective ground shear strength.
Keywords
shear strength; portable dynamic cone penetration test; cohension; friction angle; direct shear test;
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  • Reference
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