Naslov
Piezocone tests in clay

Autori
Larsson, Rolf ; Mulabdić, Mensur

Izvornik
Issue Number: 42, Statens Geotekniska Institut

Vrsta, podvrsta
Ostale vrste radova, izvještaj

Godina
1991

Ključne riječi
accuracy; calibration; classification; clay; cone penetrometers

Sažetak
The piezocone test is an unsurpassed method of determining the strategraphy of all types of soils into which it can be pushed down. The method is well established for investigations in sand. In more fine-grained soils, increased use of the piezocone test would bring about a higher quality of the soil investigations in terms of determinations of stratigraphy. Substantial information of the soil properties can also be obtained mainly concerning undrained shear strength, preconsolidation pressure and drainage conditions. For accurate estimation of the properties, supplementary sampling and determination of the consistency limits is usually required. The processes in the soil during penetration in terms of development of tip resistance, pore pressures and sleeve friction are found to follow the general picture for soil behaviour that has been empirically established by other types of tests and loadings. The results can be interpreted in this light and the only significant difference to other types of loading tests that has to be accounted for is the rate effect. In fine-grained soils, the results are mainly governed by the average undrained shear strength, which is also the design shear strength in most practical applications. The results, however, are highly dependent on the actual cone design and a much stricter standard has to be introduced before the possibilities of the piezocone test can be fully utilized in fine- grained soils.

Izvorni jezik
Engleski

Znanstvena područja
Građevinarstvo

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