Crane Mounted CFA - Single Stroke - Deeper-PPT Presentation

PPT Presentation

Pdf Summary

The presentation evaluates crane-mounted continuous flight auger (CFA) equipment for a Kelowna project requiring 750 mm piles, up to 48 m (157 ft) deep, installed in a single stroke. The piles weigh 287 lb/ft and are spaced 2.2 m apart. A BAT 360 rotary drive, rated at 360 kNm (265,000 ft-lb), was available.<br /><br />A traditional drill rig was not suitable because the client’s largest available BG36 could reach only 29 m in a single stroke—short of the required depth. The presentation compares three lead options: the H25 (up to 42 m, 210,000 ft-lb torque), H28 (up to 65.5 m, 250,000 ft-lb), and H36 (up to 70 m, 350,000 ft-lb). The H36 was selected as capable of meeting the required length and torque and readily available.<br /><br />Crane stability and the ability to loft the system were also assessed. The Liebherr LR1300 was selected for its stability, reach, and availability. The analysis indicates capacity for seven piles at a 275-ton configuration and 17 at 330 tons. The presentation concludes that the selected crane and lead could achieve the required loft and complete the CFA piles in a single stroke.

Keywords

crane-mounted CFA

continuous flight auger

Kelowna project

750 mm piles

single-stroke installation

BAT 360 rotary drive

H36 lead

Liebherr LR1300

crane stability

pile installation depth