WAVE EQUATION ANALYSIS OF PILE DRIVING SYSTEM

A computer program was written and tested that performs a realistic Wave Equation Analysis of Piles driven by any type of impact hammer. Conventional pile and soil models were used in addition to both a thermodynamic model for diesels and refined mechanical hammer models. The program development was aimed at providing a simple input and both a flexible and extensive output that includes automatic plotting capabilities. Pile Driving Hammer data were prepared and stored in a file for most of the commonly encountered models. The computer language is Fortran IV. The program was extensively tested against measured pile top force and velocity data and against measured diesel combustion pressure and stroke. This program uses a method of analysis known as the Wave Equation. It has been used to predict impact stress in piles at the time of driving. This information makes it possible for the engineer to answer such questions as: Can a given hammer drive a pile to the required depth of penetration; Will excessive stresses be induced in pile or hammer during driving; What cushion is necessary to limit driving stresses.

• Supplemental Notes:
  • Source tape is in EBCDIC character set. Tape(s) can be prepared in most standard 7 or 9 track recording modes for one-half inch tape. Identify recording mode desired by specifying character set, track, density, and parity. Call NTIS Computer Products if you have questions. Price includes documentation, PB-261 900 through PB-261 903 and PB-261 905 through PB-261 908.
• Corporate Authors:

  Federal Highway Administration

  1200 New Jersey Avenue, SE
  Washington, DC  United States  20590
• Authors:
  • Chang, C
  • Feather, R
• Publication Date: 1977-6-21

Subject/Index Terms

• TRT Terms: Bearing capacity; Bearing piles; Computer programs; Concrete; Diesel engines; Magnetic tapes; Mathematical models; Pile driving; Properties of materials; Shock resistance; Software; Soils; Structural analysis; Support piles; Testing; Thermodynamics; Wave equations
• Identifier Terms: FORTRAN (Computer program language)
• Uncontrolled Terms: Impact strength; Models; Soil properties
• Old TRIS Terms: Concrete piles; Pile drivers; Pile structures; Wave equation formula
• Subject Areas: Construction; Geotechnology; Highways; Materials;

Filing Info

• Accession Number: 00166432
• Record Type: Publication
• Source Agency: National Technical Information Service
• Report/Paper Numbers: FHWA/DF-77/002 Program
• Files: NTIS, TRIS, USDOT
• Created Date: Sep 28 1978 12:00AM