Reliability-Based Geotechnical Resistance Factors for Axially Loaded Micropiles

Micropiles are small-diameter drilled and grouted deep foundation elements used in various applications that often involve superstructure or ground conditions where construction of other foundation types is not practical.

The TRB National Cooperative Highway Research Program's NCHRP Research Report 989: Reliability-Based Geotechnical Resistance Factors for Axially Loaded Micropiles details the development of reliability-based geotechnical resistance factors for axially loaded micropiles and related design specifications.

Supplemental to the report is an Appendix.