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D-20 Rockwheel Trenching in Halifax

The Project

A trench was required for a housing developmennt in Illingworh, Halifax to locate a sewage pipe, the trench was 6M deep X 1.2M Wide in

Yellow sandstone with a Unified Compressive Strength of 75 MPa, Cerchar Abasive Number 4.55.


The Solution

A D-20 Rockwheel with T1 picks attached via a quick hitch adapter bracket to a Daewoo 220 set at 320 Bar working pressure at a power of 40KW, the excavation rate

achieved was 3.5M¬≥/hour and the pick useage was measured to be an average of 4 Pick Per cbic Metre.




“Project started with hydraulic hammer. ‘V’ shaped excation lead to be a problem. The rockwheel ensured the exact profile was met and the excavated material
could be used as backfill. The unit was also much quieter than a conventional hammer. Overall the rockwheel was quicker and saved money”. (Glyn Cooper – Site Foreman – J Hughes Construction)