Piezocone dissipation tests at the Canadian Test Site No. 1, Gloucester, Ontario

摘要

A series of pore-water pressure dissipation records were acquired using a type 2 piezocone penetrometer sounding that was performed in the sensitive Leda clays underlying the Canadian Geotechnical Research site in South Gloucester, Ontario. This note presents the results of the piezocone penetration test (CPTu) sounding and the individual pore-water pressure decays with time that were measured at 1 m vertical intervals, ranging from depths of 2 to 23 m at the site. Using soil behavioral charts, the sounding confirmed the presence of soft sensitive clays. While many of the dissipations were predominantly monotonic, some dilatory response was also observed at shallow depths. Thus, a grouping of dissipatory behaviors was used to infer layers of similar clay characteristics. The results are offered as complementary data to existing in situ and laboratory information that have been collected at this important experimental test site.