Numerical Simulation of CPT Tip Resistance in Layered Soil

The paper presents the results of a numerical modeling for cone penetration in layered soil. Experimental studies show that as the tip advances into different soil layers, it senses the effects of an approaching layer. The cone penetration tip resistance is influenced by the soil properties ahead and behind the tip. The interface distance over which the tip resistance senses the effect of a soil layer is reported to be 5 to10 times the cone diameter. With the present analysis, the complete process of cone penetration is modeled as the cone starts to penetrate the soil from the ground surface to any deeper layers below the ground. This capability of the program enables the analysis of penetration in layered soil to be modeled in a realistic way. The commercial computer program FLAC is used for this analysis.

Keywords:

Modeling , cone penetration test , layered soil