The hydromills are designed by Casagrande to match today’s demands of diaphragm wall construction.
The Casagrande Hydromill FD70 – Winches version is the model that suits the widest range of requests for special foundations. This version is available with specialised motors to increase wheels torque.
The equipment consists of a heavy steel frame with two drive gears, attached to its lower section which rotate in opposite directions around horizontal axes. The soil, or rock, is “milled” by the cutting wheels from the bottom of the trench and continuously moved, mixed with slurry, and removed by a powerful flushing pump.
The hydromills utilizes a wealth of engineering expertise gained by Casagrande in many years of geotechnical available for the application of electronics to record depth, verticality and cutting force and to provide with instant information to control performance and maximize on production. The all-round ruggedness of hydromills are complemented by attention to details. The suspension of the hose reels by automatic winches and the fitting of a powerful flushing pump to remove cuttings.
Whether in hard or soft soils, a choice of cutters is available to match every condition and demands of different wall widths can be easily met by changing the cutter wheels and the interchangeable guides. All models of the hydromills are designed to work on the principle of reverse circulation. Cutting chains are used enable the equipment to cut through hard strata, to guarantee the cut throughout the wall width and to provide better joints and excellent interlocking.
|Depth of excavation||50 m||164 ft|
|Width of trench||760 ÷ 1500 mm||2.5 ÷ 4.9 ft|
|Lenght of trench||2800 / 3150 mm||9.2 / 10.3 ft|
|Torque at the wheel axle||2 x 100 kNm||2 x 73,760 lbf·ft|
|Wheel speed||0 ÷ 30 rpm||0 ÷ 30 rpm|
|Capacity of mud pump||450 m³/h||15,890 ft³/h|
|Mill weight||45 ÷ 50 t||44.3 ÷ 49.2 ton|