00672552

Component

http://onlinepubs.trb.org...trr/1994/1447/1447-002.pdf

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

The use of augered cast-in-place piles has seen a tremendous growth in Florida because of the price and ease of installing them in coastal shell-filled sands. Discussed is the construction of augered cast-in-place piles, including equipment selection, drilling rate, grout fluidity, grout's aggregate size, grout pumping, and auger removal. Also presented is a comparison between a data base of 21 pile load tests (17 compression and 4 tension) from Florida and five design methods. Three of the methods were developed for augered cast-in-place piles, the other two for driven piles and drilled shafts. The predicted capacities of these methods were compared with three types of settlements of the piles' diameters. All of the methods compared most favorably to the 5% criterion. The drilled-shaft approach gave the best prediction for the whole data base, with a mean of 1.08 and a standard deviation of 0.28 for the ratios of predicted to measured capacity and, in the case of compression loadings only (17 piles), a mean of 0.98 and a standard deviation of 0.16. The latter finding suggests that augered cast-in-place piles behave more like drilled shafts than driven piles because of the installation method.

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. 10-18

1994

Transportation Research Record

0309060532

Figures (5) ; References (12) ; Tables (4)

Cast in place structures; Construction; Construction equipment; Design; Design methods; Grout; Load tests; Settlement (Structures); Support piles

Florida

Florida

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 STARSOL PILES
• DETERMINING LENGTHS OF INSTALLED TIMBER PILES BY DISPERSIVE WAVE PROPAGATION
• 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