J Peuchen, SJ Plasman & R van Steveninck, Fugro Engineers BV. This paper was first published in GE’s January/February 1996 edition.
Tropical regions include soil conditions not commonly found in the more temperate areas of Europe and North America where electrical cone penetration testing (CPT) apparatus was originally developed. The more complex of these tropical conditions are residual soils and calcareous soils, both of which can be characterised by highly variable and erratic strength. They offer a harsh environment for CPT apparatus.
This paper presents examples of commercial CPT experience for tropical residual soils. Three sites are considered, covering more than 800 tests including 500 piezocone tests. The sites are situated in Thailand, Malaysia and Singapore. They represent residual soils derived from the weathering of igneous, metamorphic and sedimentary rocks respectively.