GEOLINKS International Conference 2019, Book 3
ESTIMATION OF THE COEFFICIENT OF CONSOLIDATION BY USED CPT AND HIS VERIFICATION WITH NUMERICAL MODEL
Prof. Marian Drusa, PhD, C. Eng, MSc. Filip Gago, Assoc. Prof. Juraj Mužík
Static penetration tests are among the recognized methods for testing soil in all regions of the world. The in-situ test is a quick way of obtaining results and a reliable method of continuous determination properties of soil in the ground where the soil has original geostatic stress. Index and mechanical properties of soil are not affected by sampling for laboratory testing. In designing buildings, field tests in combination with numerical modelling are currently preferred. In-situ tests determine the strength and deformation properties of soils that are directly input values into numerical calculations.
Correct determination parameters of soil are the main requirement of the engineering-geological survey, which serves as basic documentation for designers of geotechnical constructions. Determination consolidation parameters of soil “in-labo” conditions are taking a lot of time. Engineers often need the results of tests in a short period of time, so there is a trend in the world where some parameters of soil are determined from the penetration tests. These CPT tests give a basic view of the character of the soil. The article describes the basic procedures for determining the consolidation parameters of the soil using the results obtained by the static penetration test. The simulation of the dissipation test provides a picture that field tests are suitable for determining the consolidation parameters of fine-grained soil sediments. At the end of the article, we compare the values of consolidation parameters obtained by traditional techniques with values derived from the numerical analysis.
coefficient of consolidation, CPT, CPTu, numerical analysis, dissipation test