PILE-DRIVING ANALYSIS BY ONE DIMENSIONAL WAVE THEORY: STATE OF THE ART

THE NUMERICAL COMPUTER SOLUTION OF ONE-DIMENSIONAL WAVE EQUATION IS USED FOR ANALYSIS OF PILE-DRIVING PROBLEMS. THE WAVE EQUATION IS USED TO PREDICT IMPACT STRESSES IN A PILE DURING DRIVING AND TO ESTIMATE THE STATIC SOIL RESISTANCE ON A PILE AT THE TIME OF DRIVING FROM DRIVING RECORDS. IF THIS METHOD IS USED, THE EFFECTS OF SIGNIFICANT PARAMETERS CAN BE EVALUATED DURING THE FOUNDATION DESIGN STAGE. THESE PARAMETERS INCLUDE TYPE AND SIZE OF PILE-DRIVING HAMMER; DRIVING ASSEMBLIES SUCH AS CAP BLOCK, HELMET, AND CUSHION BLOCK; TYPE OF SIZE OF PILE; AND SOIL CONDITION. FROM THE ANALYSIS APPROPRIATE PILES AND DRIVING EQUIPMENT CAN BE SELECTED TO CORRECT OR AVOID EXPENSIVE AND TIME-CONSUMING CONSTRUCTION PROBLEMS, SUCH AS EXCESSIVE DRIVING STRESSES OR PILE BREAKAGE AND INADEQUATE EQUIPMENT, TO ACHIEVE DESIRE PENETRATION OR BEARING CAPACITY. WAVE-EQUATION EVALUATION OF DATA FROM THE MICHIGAN PILE STUDY INDICATED THAT A RELATIVELY SIMPLE FORMULA CAN BE USED TO DETERMINE THE ENERGY OUTPUT FOR BOTH STEAM AND DIESEL PILE-DRIVING HAMMERS. THE DRIVING ACCESSORIES SIGNIFICANTLY AFFECT THE PILING BEHAVIOR, AND, THEREFORE, THEIR SELECTION SHOULD BE CAREFULLY CONSIDERED AND ANALYZED. THE EFFECT OF PILE DIMENSIONS ON ABILITY TO DRIVE THE PILE VARIED GREATLY; GENERALLY, STIFFER PILES CAN OVERCOME GREATER SOIL RESISTANCE TO PENETRATION. THE WAVE EQUATION IS USED TO ESTIMATE SOIL RESISTANCE ON A PILE AT THE TIME OF DRIVING. BEFORE LONG-TERM BEARING CAPACITY CAN BE EXTRAPOLATED FROM THIS RESISTANCE, HOWEVER, ENGINEERS MUST CONSIDER THE EFFECT OF SOIL SETUP OR RELAXATION, AND OTHER TIME EFFECTS THAT MIGHT BE IMPORTANT. /AUTHOR/

• Record URL:
  http://onlinepubs.trb.org/Onlinepubs/hrr/1970/333/333-005.pdf
• Supplemental Notes:
  • Paper sponsored by Committee on Substructures, Retaining Walls and Foundations 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:
  • Hirsh, T J
  • Lowery, L L
  • Samson, C H
  • Coyle, H M
  • Samson Jr, C H
• 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: Figures; References; Tables;
• Pagination: pp 33-54
• Monograph Title: Pile foundations
• Serial:
  • Highway Research Record
  • Issue Number: 333
  • Publisher: Highway Research Board

Subject/Index Terms

• TRT Terms: Analysis; Energy; Evaluation; Field tests; Hammers; Information processing; Output; Pile driving; Resistance (Electricity); Soils; Stresses; Support piles; Wave equations
• Uncontrolled Terms: Data; Static resistance
• Old TRIS Terms: Wave equation formula
• Subject Areas: Construction; Energy; Geotechnology; Highways;

Filing Info

• Accession Number: 00215379
• Record Type: Publication
• Files: TRIS, TRB
• Created Date: May 26 1971 12:00AM