Proceedings - 13th International Workshop on Micropiles - 2017, Vancouver, BC, Canada, (ISM, DFI, ADSC)
RECENT ADVANCES IN OVERBURDEN AND DOWN-THE-HOLE DRILLING TECHNIQUES
Donald A. Bruce and Rudy Lyon
The safe and efficient drilling of overburden (fills and natural soils) and rock is integral to many specialty geotechnical construction techniques. The state of practice for overburden drilling techniques was most recently described by Bruce in 2012, and the history of Down-the-Hole (DTH) drilling for rock was provided by the authors in 2013 (Bruce et al., 2013). Thereafter, development and innovation have continued, principally to satisfy specialty contractorsí goals for systems providing faster production, lower costs, more consistent and reliable performances, and easier operation and maintenance. This paper describes more recent developments in overburden drilling, and reviews innovations in DTH methods operated by air, and by water.
|article #2642; publication #1033 (ISM- 2017)|