ASCE 20-96 American Society of Civil Engineers Standard Guidelines for the Design and Installation of Pile Foundations Published by American Society of Civil Engineers 1801 Alexander Bell Drive Reston, Virginia 20191-4400 Abstract: This Standard provides a guideline for an engineering approach to the design and subsequent installation of pile foundations. The purpose is to furnish a rational basis for this process, taking into account published model building codes and general standards of practice. It covers such topics as: 1) Administrative requirements; 2) pile shaft strength requirements; 3) soil-pile interface strength requirements and capacity; 4) design loads; 5) design stresses; 6) construction and layout guidelines for pile design; and 7) installation guidelines for pile construction. In addition, the Standard includes information on applicable standards from ASTM, AWPA, and ACL It concludes with an Appendix on partial factors of safety. Library of Congress Cataloging-in-Publication Data American Society of Civil Engineers. Standard guidelines for the design and installation of pile foundations / ASCE, American Society of Civil Engineers. p. cm. ISBN 0-7844-0219-1 1. Piling (Civil engineering)~Design and construction—Standards. I. Title. TA780.A523 1997 96-30072 624.1'54-dc21 CIP Photocopies. Authorization to photocopy material for internal or personal use under circumstances not falling within the fair use provisions of the Copyright Act is granted by ASCE to libraries and other users registered with the Copyright Clearance Center (CCC) Transactional Reporting Service, provided that the base fee of $4.00 per article plus $.50 per page is paid directly to CCC, 222 Rosewood, Drive, Danvers, MA 01923. The identification for ASCE Books is 0-7844-0219-l/97/$4.00 + $.50 per page. Requests for special permission or bulk copying should be addressed to Permissions & Copyright Dept, ASCE. Copyright © 1997 by the American Society of Civil Engineers, All Rights Reserved. Library of Congress Catalog Card No: 96-30072 ISBN 0-7844-0219-1 Manufactured in the United States of America. STANDARDS In April 1980, the Board of Direction approved Specifications for Masonry Structures (ACI530.1- ASCE Rules for Standards Committees to govern 95/ASCE6-95/TMS602-95) the writing and maintenance of standards devel- Specifications for Masonry Structures (ACI530- oped by the Society. All such standards are devel- 95/ASCE6-95/TMS602-95) oped by a consensus standards process managed by ANSI/ASCE 7-95 Minimum Design Loads for the Management Goup F (MGF), Codes and Building and Other Structures Standards. The consensus process includes balloting ANSI/ASCE 8-90 Standard Specification for the by the balanced standards committee made up of Design of Cold-Formed Stainless Steel Structural Society members and non-members, balloting by Members the membership of ASCE as a whole and balloting ANSI/ASCE 9-91 listed with ASCE 3-91 by the public. All standards are updated or reaf- ANSI/ASCE 10-90 Design of Latticed Steel firmed by the same process at intervals not exceed- Transmission Structures ing five years. ANSI/ASCE 11-90 Guideline for Structural Condition Assessment of Existing Buildings ANSI/ASCE 12-91 Guideline for the Design of The following standards have been issued: Urban Subsurface Drainage ASCE 13-93 Standard Guidelines for Installation of ANSI/ASCE 1-82 N-725 Guidelines for Design Urban Subsurface Drainage and Analysis of Nuclear Safety Related Earth ASCE 14-93 Standard Guidelines for Operation and Structures Maintenance of Urban Subsurface Drainage ANSI/ASCE 2-91 Measurement of Oxygen Transfer ANSI/ASCE 15-93 Standard Practice for Direct in Clean Water Design of Buried Precast Concrete Pipe Using ANSI/ASCE 3-91 Standard for the Structural Standard Installations (SIDD) Design of Composite Slabs and ANSE/ASCE 9- ASCE 16-95 Standard for Load and Resistance 91 Standard Practice for the Construction and Factor Design (LRFD) of Engineered Wood Inspection of Composite Slabs Construction ASCE 4-86 Seismic Analysis of Safety-Related ASCE 20-96 Standard Guidelines for the Design Nuclear Structures and Installation of Pile Foundations Building Code Requirements for Masonry Struc- ASCE 21-96 Automated People Mover tures (ACI530-95/ASCE5-95/TMS402-95) and Standards-Part 1 111 This page intentionally left blank FOREWORD Piles differ from most other portions of a struc- account published model building codes and general ture in that with few exceptions they are not able to standards of practice. It is intended for use by pro- be visually inspected after installation. Driven piles fessional personnel of sufficient competency to are generally subjected to considerable stress during evaluate the essence and limitations of the provi- installation. For both driven and drilled piles, the sions contained herein and who will accept the potential for the pile shaft to sustain damage during responsibility for the application of the material pre- installation should be considered in the determina- sented. tion of minimum dimensions and maximum design In general, the expertise required to properly stresses. Furthermore, consistently identifiable soil implement this Standard is seldom found in one strength parameters, coupled with consistent or uni- individual. A common design team includes both a form bearing strata are generally not luxuries found structural engineer and a geotechnical engineer, and in foundation design. may in addition include a pile contractor to provide This Standard provides a guideline for an engi- construction expertise and cost estimates. neering approach to the design and subsequent Communication among all members of the design installation of pile foundations. The purpose is to team and the client will aid in the successful imple- provide a rational basis for this process, taking into mentation of this Standard. v This page intentionally left blank ACKNOWLEDGMENTS The American Society of Civil Engineers (ASCE) Thomas D. Dismuke acknowledges the work of the Pile Foundations Michael F. Engestrom Standards Committee of the Codes and Standards C. Scott Fletcher Activities Committee (CSAC). This group comprises Frank Gaasch individuals from many backgrounds including: con- James S. Graham sulting engineering, research, the construction indus- Ahmad Habibian try, design, and private practice. Joseph C. Harden These Standard Guidelines were prepared Steven W. Hunt through the consensus standards process by ballot- Mohamad H. Hussein ing in compliance with procedures of ASCE's Barry A. Johnson Codes and Standards Activities Committee (CSAC). Michael L. Jones Those individuals who serve on the Standards Jai Kim Committee are: Robert G. Lukas Daniel M. McGee Carroll L. Crowther, Chairman Cetin A. Okcuoglu Girish Agrawal Robert F. Pierry, Jr. James E. Barris Abdulreza A. Sadjadi James C. Benton, Jr. Jerry A. Steding Edward Demsky Yuanhui Sun vn This page intentionally left blank Standard Guidelines for the Design and Installation of Pile Foundations Contents PAGE FOREWORD v STANDARDS Hi ACKNOWLEDGMENTS vii 1 GENERAL 1 1.1 Scope 1 1.2 Referenced Standards 1 1.3 Deviations from This Standard 1 1.4 Engineer Required 1 1.5 Definitions 1 2 ADMINISTRATIVE REQUIREMENTS 3 2.1 Investigation for Design 3 2.2 Design Analysis 3 2.3 Durability 3 2.4 Adjacent Property 3 2.5 Use of Existing Piles 3 2.6 Special Design Considerations 3 2.7 Coordination with Other Work 3 2.8 Installation Criteria 4 2.9 Plans and Specifications 4 2.10 Records 4 2.11 Design Modifications 4 2.12 Load Tests 4 3 PILE SHAFT STRENGTH REQUIREMENTS 7 3.1 General 4 3.1.1 Minimum pile shaft material requirements 4 3.2 Structural Strength of Piles 4 3.2.1 Maximum allowable shaft stresses 5 3.3 Critical Shaft Section 5 3.4 Handling and Driving Stresses 5 3.5 Piles with Unsupported Length 5 4 SOIL-PILE INTERFACE STRENGTH REQUIREMENTS AND CAPACITY 5 4.1 General 5 4.1.1 Analysis of soil-pile capacity 5 4.2 Designation of Supporting Strata 5 4.2.1 Ultimate capacity 5 4.2.2 Pile groups 5 4.3 Static Resistance Analysis 6 4.3.1 Pile movement under load 6 4.4 Negative Friction 6 4.5 Pile Load Tests 6 4.5.1 Design capacity by load tests 6 4.5.2 Dynamic testing 6 4.5.3 Static load tests 7 4.5.3.1 Static compressive load tests 7 4.5.3.2 Static tensile load tests 7 IX