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AN EXAMPLE OF GEOTECHNICAL AND GEOPHYSICAL INVESTIGATION WORKS IN SOFT SOILS
Abstract
An important prerequisite for geotechnical foundation analysis is to have a sufficient amount of quality data on soil parameters. In difficult geotechnical soil condition, e.q. thick deposits of soft fine-grained unconsolidated soils, particular importance should be given to the selection and performance of field and laboratory investigations. This paper shows an example of geophysical and geotechnical investigation works, which were performed in Croatia (the city of Opuzen) for the purpose of foundation design. The main goal of the investigation works was to obtain the foundation soil profile along with the distribution of relevant geotechnical parameters values with depth. Due to specific terrain configuration, the planned building will be built on the embankment. According to the investigation work results, foundation soil consists of approximately 23 m thick soft unconsolidated sediments, on top of a dense sand layer. Considering complex geotechnical conditions and the loads, following investigation methods were selected: soil drilling, the piezocone penetration test (CPTu), vane shear test (VST), electrical tomography (ERT) and multichannel analysis of surface waves (MASW).
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