Category Archives: Features

Flashback: Saving the Calgary Zoo

The Calgary Zoo is located in the Bridgeland neighbourhood of Calgary, just east of the city’s downtown. It is accessible via light rail system, car, and bicycle/foot via the Bow River pathway. A large portion of the zoo is located on St. George’s Island in the Bow River. The zoo,…

Liebherr THS 110 D-K crawler concrete pump especially suited to special civil engineering works

Concrete pump on a crawler running gear with a maximum delivery rate of 102 m³/h Particularly suited for job sites that involve frequent relocation around the construction site Radio remote control included as standard Intermat 2018 will see Liebherr introduce the THS 110 D-K crawler concrete pump, which offers a…

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…