Pile Design and Construction Practice, Fifth edition

Piling equipment and methods 109

Figure 3.27‘Flydrill 5500’ with bucket auger removing spoil from 4.75 m dia monopiles at the Barrow
offshore wind farm site (courtesy Bauer Maschinen GmbH).

rig provides 30 kNm torque through the top drive for boring and 339 kNm torque on the
lower rotary table for simultaneous casing up to 1000 mm diameter. The Liebherr pile driving
rigs (see Section 3.1.1) have the option of running double rotary top drive or kelly tools for
bored and CFApiles. In-cab electronic instrumentation and read-out to control positioning
and drilling parameters is standard on most rigs.