00672555

Component

http://onlinepubs.trb.org...trr/1994/1447/1447-005.pdf

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

Cast-in-place concrete piles are produced by drilling holes in the ground and filling them with concrete. The constructed shape and structural integrity of this pile type is dependent on concrete quality, subsurface conditions, and workmanship. Many engineers are willing to consider this type of piling but require adequate inspection and shaft integrity verification. Dynamic low-strain testing and analysis by the Sonic Pulse Echo Method with equipment such as the Pile Integrity Tester provide a quick and inexpensive means to assess the integrity of all types of concrete piles (where modulus is much higher than surrounding soil) by measuring top motion (and force) under the impact of a small hand-held hammer and then applying one-dimensional wave propagation theories. Data interpretation can be either a simple visual inspection of the dynamic pile records, a rigorous numerical analysis, or a technique that generates an "impedance profile" as a function of length. Testing and data evaluation require experience and engineering judgment. The principles, application, and limitations of the low-strain integrity testing method are presented, and a step-by-step record evaluation and interpretation procedure is proposed. Finally, the value of the record for the quality-assurance process of pile foundations is assessed.

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. 30-38

1994

Transportation Research Record

0309060532

Figures (7) ; References (9)

Cast in place structures; Inspection; Nondestructive tests; Quality assurance; Structural analysis; Support piles; Testing equipment

Structural integrity

Bridges and other structures; Construction; Design; Highways; I24: Design of Bridges and Retaining Walls; I53: Construction 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
• DETERMINING LENGTHS OF INSTALLED TIMBER PILES BY DISPERSIVE WAVE PROPAGATION
• 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