00672563

Component

http://onlinepubs.trb.org...trr/1994/1447/1447-013.pdf

https://scholar.google.co...glas&publication_year=1994

Timber piles are used as a primary means of support for many structures, such as bridges, throughout the continental United States and must periodically be inspected. Sometimes a pile's overall length is not known because pile records are incomplete or nonexistent; so, calculating the effects of scour on its embedment length can present a problem. A new nondestructive testing method is described that employs dispersive stress-wave propagation and special signal-processing techniques to find the lengths of installed timber piles. The method was studied and developed in the laboratory and then applied to installed piles in the field for which there were records. Some piles were pulled to verify the method directly. The computed pile lengths, compared with records or measurements after pulling, were within error bounds of approximately +/- 10%. The test method holds promise for calculating the depth and physical condition of deeply embedded piles as well as those embedded in shallow concrete footings, and it has been shown to be predictive for piles of varying physical conditions and ages.

This paper appears in Transportation Research Record No. 1447, Design and Construction of Auger Cast Piles, and Other Foundation Issues. 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

01401277

English

p. 110-115

1994

Transportation Research Record

0309060532

Figures (7) ; References (8)

Accuracy; Inspection; Length; Nondestructive tests; Support piles; Timber; Wave motion

Dispersion (Waves)

Bridges and other structures; Design; Highways; I24: Design of Bridges and Retaining Walls

TRIS, TRB

Jan 13 1995 12:00AM

• ANALYTICAL MODELING OF SPREAD FOOTING FOUNDATIONS FOR SEISMIC ANALYSIS OF BRIDGES
• ATLAS SCREW PILE: A VIBRATION-FREE, FULL DISPLACEMENT, CAST-IN-PLACE PILE
• BITUMEN COATING FOR DOWNDRAG MITIGATION IN COHESIONLESS SOILS
• BUCKLING OF FRICTION PILES SUPPORTING BRIDGE FOUNDATIONS
• DESIGN AND CONSTRUCTION OF AUGER-CAST PILES IN FLORIDA
• DESIGN AND CONSTRUCTION OF STARSOL PILES
• FORMALIZED PROCEDURE FOR QUALITY ASSESSMENT OF CAST-IN-PLACE SHAFTS USING SONIC PULSE ECHO METHODS
• LRFD CODE FOR ONTARIO BRIDGE SUBSTRUCTURES
• MANAGING THE INSTALLATION OF AUGERED CAST-IN-PLACE PILES
• NEW TECHNIQUES FOR RELIABLE PILE INSTALLATION AND PILE BEHAVIOR DESIGN AND ANALYSIS
• REDUCED IMPACT ON ADJACENT STRUCTURES USING AUGERED CAST-IN-PLACE PILES
• REVIEW OF AUGERED PILE PRACTICE OUTSIDE THE UNITED STATES
• USE OF DEEP BLAST DENSIFICATION FOR BRIDGE FOUNDATION IMPROVEMENT ON SR-504