Ground investigations, contracts and testing 519in two parts according to BSEN 1536 Annex B for each bored pile. Records for CFApiles
should include the pitch of the screw and the factors included on data loggers used to
monitor construction, for example, the penetration per revolution, torque of drilling motor
and pumping pressure of grout or concrete (Figure 2.32). Clause 9.2.5 of BSEN 1536 states
that ‘ground behaviour’during excavation shall be observed and any changes which may be
important shall be communicated to the supervisor and designer. Reference should be made
Figure 11.6Safety cage used for inspection of pile boreholes.