dynamic the testing penetration using Soil cone
Exploration Investigation Testing. Different methods were employed to separate the total measured resistance into components generated by the conical tip the "tip friction" and friction generated by the rod string. Sandiford, D. This data helps determine the shear modulus and Poisson's ratio at intervals through the soil column for soil liquefaction analysis and low-strain soil strength analysis. It was initially developed in the s at the Dutch Laboratory for Soil Mechanics in Delft to investigate soft soils.
Procedure and Test Apparatus
In cohesive soils the penetration rod may be rotated slightly to prevent binding of the soil and the rod influencing test results. The test method consists of pushing an instrumented cone, with the tip facing down, into the ground at a controlled rate controlled between 1. In addition to the mechanical and electronic cones, a variety of other CPT-deployed tools have been developed over the years to provide additional subsurface information.