Foundation Construction
- Drilled shafts are the preferred foundation type, as they effectively transfer large overturning moments, uplifts, and torsional loads to the substrata (soil). The foundation design adheres to the AASHTO LRFD Bridge Design Specifications (2020). Drilled shafts with a minimum diameter of 30 inches are recommended.
- The structural design of drilled shafts and anchor bolts must conform to ACI 318-19 standards, providing guidelines for concrete structure design and construction.
- Additionally, the design of steel base plates and anchor rods must comply with the AISC Base Plate and Anchor Rod Design Guide, with all steel connections following the AISC Steel Construction Manual 360-22.
- A drilled shaft foundation, measuring 12 feet in depth and 30 inches in diameter, was implemented.
- The foundation system also included a pile cap, designed to anchor the DWTB columns securely.
- The pile cap and drilled shaft were constructed monolithically, ensuring safe load distribution and structural continuity.
- Concrete cylinders were tested at 7 and 28 days, confirming that the concrete achieved the required strength before proceeding with the superstructure erection.
