engleski

Use of penetration testing for determination of soil properties in earth dam

The Paper describes a case of a small earth dam for which remediation work was planned, due to bad construction and possible damage to the dam that could have occurred during filling of the retention. In order to assure relevant data for the remediation design solution it was necessary to determine the current state of the compacted dam and properties of the clay fill in the dam. Investigation work consisted of drilling boreholes and performing in situ test on the and of laboratory testing of soil samples. CPT and DMT in situ tests were carried out nearby the boreholes on the crest. Potential of these in situ tests in describing physical and mechanical properties of the clay was analysed, since standard methods of interpretation of these tests are based on natural soils, while the dam was constructed by compacting clay. It has been shown that CPT and DMT tests are useful in describing properties of a compacted clay embankment, but also that one should be cautious in using common methods of interpretation of their test results in case of earth fill embankments.

earth dam ; compacted clay ; piezocone test ; flat dilatometer test ; interpretation

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