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]
Geologic Hazards
Aerial Video of US 89 Landslide
I saw this video on the ADOT Facebook Page. The failure seems larger than what I though based on the photos from the ground. [Source: ADOT Facebook Page]
Project Related
Lateral Load Testing of Drilled Shafts For Cable Barriers – ADSC Study
ADSC published a summary of some research being conducted by the University of Texas, Arlington (UTA) through funding by TxDOT. The research involves the lateral load testing of drilled shafts that are used for cable […]
Project Related
Magco drills deep foundations for Phoenix Airport
Magco was the drilled shaft subcontractor for Hansel Phelps Construction on two separate contracts on the Terminal 4 Project at the Phoenix Sky Harbour Airport. In this very nicely written article, the numerous material, equipment, […]