08. August 2019
We recently had a new experience in using a sonic drilling rig for our site investigation for the first time. We had previously drilled with a conventional cable percussion rig, but were unable to progress past 10m below ground level, due to bands of strong mudstone within the ground. A basement swimming pool and gym are being planned at the site, and so, deeper information was required to aid pile design. Unlike the conventional cable percussion rig, which works by dropping heavy weights into...