Laboratory tests were conducted in soft clay deposits at the Macae/RJ airport in order to obtain geotechnical parameters for a new runway design. The quality of soil samples, extracted with both brass tube (thin-walled) and reinforced PVC tube (thick-walled) soil samplers, was assessed. Both samplers were 700 mm long, with a 7 degree chamfered cutting edge and no internal clearance. Oedometer tests were conducted to compare the results of tests performed on the samples obtained using the two samplers. Based on classifications in the literature, both samplers provided very good to excellent samples in most of the cases. Moreover, given the lower cost and faster delivery of the PVC samplers, this option is shown to be a good alternative to the brass samplers.

Keywords: open tube soil sampler, sample disturbance, sample quality, sampling, soft clay,

Submitted on January 06, 2020.
Final Acceptance on May 20, 2020.
Discussion open until September 30, 2020.
DOI: 10.28927/SR.432287