Category Archives: Features

Construction and Integrity Testing of the Drilled Shafts

Malcolm Drilling installed the drilled shafts from the existing grade using a Bauer BG46 drill rig with a 263-ft (80.2 metre) long Kelly bar. Since the overburden soil layers consisted of loose manmade fill, including old wooden piles, and several sand lenses to depths of about 80 feet (24.4 metres), temporary…

Very Deep Foundations at 181 Fremont in San Francisco – Part 1

By Kirk Ellison, Ph.D., P.E., G.E., Arup North America; Eric S. Lindquist, Ph.D., P.E., Brierley Associates; and Peter Faust, Dipl.-Ing. Malcolm Drilling Company (permission from Jay Paul Company) The 181 Fremont Tower is an iconic new, mixed-use high-rise in the dense urban setting of downtown San Francisco, California, that celebrated its…

Keller has Canada covered

By combining the legacy, expertise, reach and capability of Geo-Foundations and Keller Canada, Keller is now unmatched coast-to-coast. Geo-Foundations has over 15 years of experience specialising in foundation support, ground improvement, and ground treatment projects. Geo-Foundations’ design-build services have provided comprehensive, cost-effective solutions to the most complex geotechnical challenges throughout…

Benefits of dynamic pile testing

By Garland Likins, P.E. Any structure is only as good as its foundation. For a deep foundation to perform satisfactorily, it must have adequate geotechnical capacity to support the applied load and lack structural defects. If the foundation fails, it must be remediated or the structure demolished and eventually replaced….