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]
Miscellaneous
ADSC 2008 Faculty Workshop Wrapup
Robert Thompson of Dan Brown and Associates has posted a wrapup of the 2008 ADSC Faculty Workshop. They had 20 Civil Engineering faculty attend the event. The field demonstration day was hosted by DBA at the Trial’s Training Center in Sequatchie, Tennessee. Apparently that site is Dan’s hobby. Read more about the workshop itself and also read Robert’s post about the field demonstration day including photos. In the photo at right (Robert Thompson, DBA) you can see the Statnamic test setup for a drilled shaft. A little more about the event:
Long Foundation and Hayward Baker have installed examples of several foundation and retaining structures, including drilled shafts, micropiles, and soil nails. During the field day demonstrations, the attendees will observe additional installations, load tests, and non-destructive testing.
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, […]
Geologic Hazards
U.S. 89 Landslide Exploration
Specialty drilling contractor Crux Subsurface recently completed geotechnical drilling for Kleinfelder at the site of a large landslide near Page, Arizona. Crux completed 17 holes to depths up to 250 feet using a combination of […]