The torque-to-capacity relationship for helical anchors and piles is an empirical method originally developed by the A. B. CHANCE Company beginning in the late 1950s. Today, the relationship is well recognized in the deep foundation industry. It is commonly referred to as torque correlation.
Caliche is best described as salt-cemented sand. Naturally occurring in arid and semi-arid regions, caliche is a dense, thick layer of rock-hard ground that anchor installing machines can barely scratch. CHANCE® engineers, wanting nature’s toughest test for their ROCK-IT™ helical anchor, took product to the Atacama Desert in Chile, to see if the square shaft anchor with a carbide tip welded to the shaft would live up to its name.
Rising water can damage or weaken existing transmission line and substation utility foundations. In flooded areas, drilled shafts and driven piles need to be inspected to determine if damage has occurred as a result of erosion. Here’s what you need to check:
The CHANCE® Drivecast™ screw displacement pile underwent three installations in the northeast, each achieving significantly positive test results.
There are seven key deep foundation solutions: helical piles, micropiles, driven piles, rammed aggregate, CFA piles and screw displacement piles. Each provide an industry solution. However, the applications can vary from product to product. How do the deep foundation methods compare with each other?
As the CHANCE® Drivecast™ screw displacement pile is rotated into the ground, it compresses the soil laterally, creating a void which is immediately filled with grout maintained in the reservoir. The schedule 80 centralized shaft replaces the rebar cage as column reinforcement.
Construction crews and installers face a significant investment financially and time-wise when working with Continuous Flight Auger piles. For installation alone, the process is tenfold.