Publication Abstract

Proceedings of the 28th Annual Conference on Deep Foundations, 2003, Miami Beach, FL "Deep Foundations in Compressible Soil and Soft Rock", (DFI)

Helical Pulldown™ Micropiles support Museum Celebrating the Bicentennial of the Lewis and Clark Expedition
Roy Jennings PE, Donald Bobbitt PE

The Discovery Expedition of St. Charles, MO chose to build its two-story museum in the flood plain of the Missouri River, near the starting point of the Lewis and Clark Expedition. Should the lower level be inundated at flood stage, plans call for the replica riverboats to be moved by trailer to high ground. The museum’s design required an open span structure with heavily loaded footing or piles. Spread footings could not be used due to the compressible soil profile. The location, in a historical district, precluded dynamically driven piles. Sixty-three uncased Helical Pulldown Micropiles were driven to the bearing stratum to support the museum with minimum disturbance. There were no spoils to dispose of during construction and the piles were completed in eight working days with minimum impact to the environment and neighborhood. The maximum working load requied was 84,000 pounds (374 kN). Test results are given in the form of installing torque.

 article #1216; publication #66 (AM-2003)