CURRENT CONSTRUCTION PRACTICES IN THE INSTALLATION OF HIGH-CAPACITY PILING

STRUCTURAL AND ECONOMIC CONSIDERATIONS ARE CAUSING A TREND TOWARD THE USE OF HIGH-CAPACITY PILING FOR HIGHWAY BRIDGES. THEY ARE BEING EMPLOYED IN COMBINED LOADING TO RESIST BEARING UPLIFT, AND LATERAL FORCES WITH DESIGN LOADS FROM 200 TO 1,500 TONS. THESE PILES MUST BE INSTALLED TO PENETRATIONS IN SOIL SUFFICIENT TO DEVELOP THEIR CAPACITY, AND THIS REQUIRES SPECIAL TECHNIQUES AND EQUIPMENT. INSTALLATION TECHNIQUES INCLUDING WEIGHTING, DRIVING, VIBRATION, JETTING, DRILLING, ROTATION, AND LUBRICATION. BECAUSE THE CAPACITY OF A PILE IS DETERMINED BY THE STRUCTURAL CAPACITY OF THE PILE AND THE CAPACITY OF THE SOIL, I.E., THE PILE-SOIL SYSTEM, INSTALLATION TECHNIQUES MUST NOT PERMANENTLY DECREASE THE SOIL-SUPPORTING CAPACITY. AFTER INSTALLATION, PILE-SOIL CAPACITIES MAY BE IMPROVED BY CONSOLIDATION OF SURROUNDING SOILS, CONCRETE PLUGS, GROUT INJECTION, AND EXPANSION OF THE PILE TIP. A REVIEW OF IMPORTANT RECENT INSTALLATIONS OF HIGH-CAPACITY PILES OF VARIOUS TYPES IS INSTRUCTIVE IN ILLUSTRATING THE VARIOUS COMBINATIONS OF TECHNIQUES THAT HAVE BEEN SUCCESSFULLY EMPLOYED. A REVIEW AND ANALYSIS OF PROBLEMS ALSO DIRECTS ATTENTION TO THOSE AREAS REQUIRING FURTHER DEVELOPMENT. THE VARIABLES FACING BOTH THE DESIGNER AND THE CONTRACTOR INCLUDE CHARACTER OF THE SOILS, DEPTH OF WATER OR SOFT MATERIAL, LOADS TO BE CARRIED, ACCESS FOR EQUIPMENT, MAGNITUDE OF THE JOB, AVAILABLE EQUIPMENT FOR TRANSPORTING, LIFTING, AND INSTALLING, AND AVAILABLE FACILITIES FOR FABRICATIONS OR MANUFACTURE. IT IS ESSENTIAL THAT THE DESIGN AND INSTALLATION BE INTEGRATED IF SUCCESS IS TO BE OBTAINED WITH THESE HIGH-CAPACITY PILES. THUS, THE MAXIMUM BENEFITS OF HIGH-CAPACITY PILES CAN BE MADE MORE WIDELY AVAILABLE TO THE BRIDGE ENGINEERING PROFESSION. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1970/333/333-011.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Construction Practices--Structures and presented at the 49th Annual Meeting. Distribution, posting, or copying of this PDF is strictly prohibited without written permission of the Transportation Research Board of the National Academy of Sciences. Unless otherwise indicated, all materials in this PDF are copyrighted by the National Academy of Sciences. Copyright © National Academy of Sciences. All rights reserved
• Authors:
  • Gerwick Jr, Ben C
• Conference:
  • 49th Annual Meeting of the Highway Research Board
  • Location: Washington District of Columbia, United States
  • Date: 1970-1-12 to 1970-1-16
• Publication Date: 1970

Media Info

• Media Type: Print
• Features: Photos; References;
• Pagination: pp 113-122
• Monograph Title: Pile foundations
• Serial:
  • Highway Research Record
  • Issue Number: 333
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Bridge engineering; Construction management; Design; Improvements; Installation; Methodology; Soils; Support piles
• Uncontrolled Terms: Interaction
• Old TRIS Terms: Pile bearing capacities
• Subject Areas: Construction; Design; Geotechnology; Highways; Maintenance and Preservation;

Filing Info

• Accession Number: 00215380
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: May 26 1971 12:00AM