NCHRP
Web-Only Document 39 8
Pile Design for Downdrag
EXAMPLES AND SUPPORTING MATERIAL
Richard A. Coffman
Johnathan D. Blanchard
University of Arkansas
Fayetteville, AR
Armin W. Stuedlein
Amalesh Jana
Oregon State University
Corvallis, OR
Aaron S. Budge
Minnesota State University, Mankato
Mankato, MN
Appendices for NCHRP Project 12-116A
Submitted January 20 24
© 20 24 by the National Academy of Sciences. National Academies of Sciences, Engineering, and Medicine and the graphical logo are trademarks of the National Academy of Sciences. All rights reserved.
NATIONAL COOPERATIVE HIGHWAY RESEARCH PROGRAM
Systematic, well-designed, and implementable research is the most effective way to solve many problems facing state departments of transportation (DOTs) administrators and engineers. Often, highway problems are of local or regional interest and can best be studied by state DOTs individually or in cooperation with their state universities and others. However, the accelerating growth of highway transportation results in increasingly complex problems of wide interest to highway authorities. These problems are best studied through a coordinated program of cooperative research.
Recognizing this need, the leadership of the American Association of State Highway and Transportation Officials (AASHTO) in 19 62 initiated an objective national highway research program using modern scientific techniques—the National Cooperative Highway Research Program (NCHRP). NCHRP is supported on a continuing basis by funds from participating member states of AASHTO and receives the full cooperation and support of the Federal Highway Administration (FHWA), United States Department of Transportation, under Agreement No. 693JJ31950003.
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COOPERATIVE RESEARCH PROGRAMS
CRP STAFF FOR NCHRP WEB-ONLY DOCUMENT 398
Waseem Dekelbab, Deputy Director, Cooperative Research Programs, and Manager, National Cooperative Highway Research Program
Ahmad Abu-Hawash, Senior Program Officer
Sheila A. Moore, Program Associate
Natalie Barnes, Director of Publications
Heather DiAngelis, Associate Director of Publications
Jennifer Correro, Assistant Editor
NCHRP PROJECT 12-116A PANEL
Field of Design—Area of Bridges
Jon E. Bischoff, Utah Department of Transportation, Salt Lake City, UT (Chair)
Nathalia Rodriguez Chandler, South Carolina Department of Transportation, Columbia, SC
Scott Hidden, North Carolina Department of Transportation, Raleigh, NC
Tim E. Huff, Tennessee Technological University, Cookeville, TN
Nora Kyo, California Department of Transportation, Sacramento, CA
Richard Pratt, Alaska Department of Transportation, (retired), Juneau, AK
Ryan Snook, Michigan Department of Transportation, Lansing, MI
Derrick David Dasenbrock, FHWA Liaison
CONTENTS
APPENDIX A: Load Test Database from Literature
APPENDIX B: Statistical Analyses of t-z and q-z Curve Models
APPENDIX C: Design Example 1 — Embankment Fill Over Clay Using Hand Calculations
APPENDIX D: Design Example 2 — Embankment Fill Over Clay Using PileAXL Program
APPENDIX E: Design Example 3 — Embankment Fill Over Clay (SHANSEP) Using Hand Calculations
APPENDIX F: Design Example 4 — Drawdown in Clay Using TZPILE
APPENDIX G: Design Example 5 — Liquefaction in Sand (H-Pile) Using ALLCPT and TZPILE
APPENDIX H: Design Example 6 — Liquefaction in Sand (Pipe Pile) Using ALLCPT and TZPILE
APPENDIX I: Design Example 7 — Liquefaction in Gravel Using PileAXL and TZPILE
APPENDIX J: Design Example 8 — Embankment Over Clay Over Rock Using PileAXL
NCHR Web-Only Document 398 contains the appendices for NCHRP Project 12-116A and accompanies NCHRP Research Report 1112: Design of Piles for Downdrag. Readers can read or purchase NCHRP Research Report 1112 on the National Academies Press website (nap.nationalacademies.org).