ABSTRACT
The quality and strength of deep-stabilised columns made with the Swedish stabilisation technique is studied in most cases by various penetration tests developed for this purpose. One problem is the extensive non-homogeneity of the columns, so that it is not possible on the basis of individual column penetration tests or sample points to arrive at reliable conclusions on the strength or success of the stabilisation. Statistical methods have been successfully applied in Finland for the interpretation of quality control penetration tests on stabilised columns. In Japan and the USA, the quality control of stabilised columns is based mainly on the taking of samples from the columns, in which case the strength of the column is defined by uni-axial compression tests.
