Discussion of “Site observations of weathered granitic soils subjected to cementation and partial drainage using SCPTU” [J Rock Mech Geotech Eng 15 (2023) 984–996]

Comprehensive data from in situ and laboratory tests in residual soil have been presented by Zhang et al. (2023). A number of issues addressed in the paper have been the interest of the discussers, namely the characterisation and behaviour of residual soils, limitation of piezocone testing due to the capacity of the entire system, measurement of shear wave velocity, rate effect of piezocone (CPTU) testing and piezocone testing with dual pore pressure penetrometers. Clarification and complementation of these issues are required with regard to both the execution and interpretation of the tests.