Reverse action

Arabian Forasol Foundation (AFF) is using a new Casagrande FD90 Hydromill for the installation of the diaphragm wall on the Sheik Issa Bin Zayed Tower, Dubai, UAE. The FD90 Hydromill, which uses the reverse circulation system, excavated, de-sanded and created the joints between the primary and secondary panels of the 5500 m²wall, which was constructed to a depth of 20 m.

The 50 tonne FD90, which is powered by two motors, each of 90 kNm torque, is designed to handle excavations of deep structural and cut-off walls in cemented conglomerate and hard rock with a compression strength as high as 1400 kg/cm².