Badanie przepuszczalności hydraulicznej gruntów metodą rozpraszania ciśnienia wody w porach

In recent years, the hydraulic conductivity of fme-grained soils has became the most important geotechnical parameter in an environmental engineering, due to its signiftcance in the prediction of contaminant migration. This paper presents the CPTU, DMT and BAT techniques, recently developed for hydraulic conductivity investigations. Finally, the in situ test results obtained at a site consisted pliocene clay were discussed. The hydraulic conductivity of clay obtained using field methods is in range of 4·10-11m/s (DMT) to 3·10-13m/s (BAT probe), while using laboratory test hydraulic conductivity (Skutnik i G arbulewski 2000) is equal 4·10-12 m/s. The results of tests confirmed that the BAT probe. CPTU and DMT are useful engineering tools for estimation of hydraulic conductivity of soils with low penneability.