Description

The bi-directional load test is the only alternative static load testing method that uses a time and space saving approach of loading the foundation unit’s resistance from the mid-pile or near-toe position instead of top-loading.
Bi-Directional Static Load Testing (BDSLT) is standardized by ASTM D8169 – Standard Test Methods for deep foundations under Bi-Directional Static Axial Compressive Load.
Bi-Directional Static Load Test Benefits include:

•    High capacity static load cell test method for drilled shafts, bored piles, barrettes, and ACIP/CFA piles.
•    Separates soil/rock resistance and movement data for shaft and toe.
•    Determines magnitude of the mobilized shaft and toe resistances.
•    Embedded strain gauges within the foundation determine the soil/rock resistance distribution along the foundation length for optimizing the foundation design.
•    Not restricted by structural or geotechnical limit of load frame, reaction beams, or reaction piles.
•    Multiple load cells can be employed at any depth location to apply larger loads.