United States Department of Transportation
ROSA P serves as an archival repository of USDOT-published products including scientific findings, journal articles, guidelines, recommendations, or other information authored or co-authored by USDOT or funded partners.
As a repository, ROSA P retains documents in their original published format to ensure public access to scientific information.
[PDF-21.59 MB]
Details:
-
Creators:
-
Corporate Creators:
-
Corporate Contributors:
-
Subject/TRT Terms:
-
Publication/ Report Number:
-
Resource Type:
-
Geographical Coverage:
-
Edition:Final Report
-
Corporate Publisher:
-
Abstract:This study presents the results of eighteen field uplift load tests on drilled shaft foundations. The tests were conducted to evaluate the reliability of a procedure used by the South Dakota Department of Transportation (SDDOT) to evaluate side resistance of deep foundations. This procedure utilizes a field test in which a drill rod is driven into the ground and then load tested in uplift. The uplift load divided by the cylindrical area of the rod is taken as the maximum available unit side resistance. Five test sites were underlain by cohesive soils and one site by cohesionless soil. Three test shafts were constructed and instrumented at each site. Procedures, materials, and equipment used for construction and load testing of the shafts are described. Side resistances measured by the load tests are compared to those predicted by the SDDOT field pull test. The results exhibit considerable scatter, and this is attributed in part to construction difficulties that resulted in voids in nine of the eighteen shafts. If the defective shafts are not included, the relationship between predicted and measured unit side resistance shows moderately good agreement, based on regression analysis. It is recommended that SDDOT continue to use the field pull test. However, additional load tests, including tests on full-scale drilled shafts, are recommended to further evaluate the reliability of the pull test. It is recommended that other methods for evaluating side resistance, based upon soil shear strength properties and in-situ tests, be explored.
-
Format:
-
Funding:
-
Collection(s):
-
Main Document Checksum:
-
Download URL:
-
File Type:
