scope:

This document deals with field testing with borehole jack test as part of geotechnical investigation and testing according to EN 1997-1 and EN 1997-2. The present document describes the procedure for conducting a test with the flexible dilatometer in natural soils and treated or untreated fills, and in very hard soils, soft or hard rocks, either on land or off-shore. The test with the flexible dilatometer is performed by the expanding of a flexible dilatometer membrane placed in the ground. The pressure applied to, and the associated expansion of the probe are measured and recorded so as to obtain a stress-displacement relationship for the soil as tested (see Figure 1).