Evaluation of Pile Load Tests for Use in Missouri LRFD Guidelines

This research studied the use of pile load tests for the development of resistance factors in the LRFD design specifications currently adopted by the Missouri DOT. Tthree bridge sites were identified to conduct a pile load test in conjunction with the normal bridge contracting activities. This allowed side-by-side comparisons with production piles and the impact to the design. The pile load tests yielded high resolution data for both the load capacity and load transfer distributions. All the static and dynamic pile load tests produced capacities higher than the ones estimated by the design engineers. The resistance factors back calculated based on the pile load test data generated higher resistance factors than the 0.65 suggested by AASHTO LRFD specifications. Pile load tests data from other sources in Missouri and the neighboring states were also collected and compiled for future use by the Missouri DOT.

 

Title: Evaluation of Pile Load Tests for Use in Missouri LRFD Guidelines
Published: June 2014
Report number: cmr 14-015
Project number: TRyy1226
Author: Ronaldo Luna

Performing organization: Department of Civil, Architectural & Environmental Engineering, Missouri University of Science and Technology

Links to reports:
Final Report (pdf, 3.7 MB, 98 pages)
Detailed listing of report and appendices A-E