ADOT put together a great little video embedded below that shows the construction of a drilled shaft foundation, or caisson as they are also known, for a bridge on the Loop 303 project in Surprise, AZ. The foundations shown are 88-feet deep and the rebar cage weighs in at about 20,000 pounds. The hole takes around 80 cubic yards of concrete to fill (that’s 8 concrete trucks). The video shows the fabrication of the cage, drilling the hole, and picking up and lowering the cage. My favorite part is the perspective of the video taken from the top of the cage as it is picked up and lowered, very cool. [Source: ADOT Blog]
Project Related
Drilled Shaft Rig Topples Over in Queensland, Australia
Fortunately nobody was seriously injured as a drilled shaft rig toppled over at a construction site in Maroochydore, Queensland, Australia. No word on what caused the accident at the building site. The operator was inside […]
Geologic Hazards
US 89 Bitter Springs Landslide Video Updates
Since I last posted about this landslide, ADOT has added several videos to their YouTube channel. It’s clear that this highway is going to be closed for the long term. ADOT and their on-call geotechnical consultant tasked with this project, Kleinfelder, are currently drilling boreholes to attempt to characterize the failure surface and determine what the geometry of the failure surface is. They are installing at least 10 inclinometers to try to determine the location of the slip plane or planes at depth and they have two extensometers to measure if any additional movement occurs. They are also performing LIDAR surveys as well. Check out the videos below.
Initial ADOT Video Describing the Failure
Click through for the videos!
Project Related
Video: Anchored Bored Pile Wall in Lisbon, Portugal
Keller posted a very cool drone video of a anchored bored pile wall in an urban area of Lisbon, Portugal. I don’t speak Portuguese, so I can’t read the captions, but the video speaks for […]