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Title:

SMALL-SCALE LOAD TESTS ON DRILLED AND CAST-IN-PLACE CONCRETE PILES

Accession Number:

00209471

Record Type:

Component

Availability:

Transportation Research Board Business Office

500 Fifth Street, NW
Washington, DC 20001 USA

Abstract:

AS A PORTION OF A MORE EXTENSIVE STUDY ON DRILLED AND CAST-IN-PLACE CONCRETE PILES, SPECIAL TESTS WERE CONDUCTED ON SMALL-SCALE PILES WHICH HAD BEEN PLACED IN A 30-IN. CUBE OF LABORATORY COMPACTED SOIL. THE USE OF THESE SMALL-SCALE PILES MADE IT POSSIBLE TO CONDUCT THESE TESTS UNDER MORE UNIFORM SOIL CONDITIONS AND TO PERFORM TESTS THAT WERE NOT PRACTICAL FOR THE LARGER FIELD-INSTALLED PILES. ONE SERIES OF SMALL-SCALE PILES WAS USED TO OBSERVE THE INFLUENCE OF SEVERAL FACTORS ON WATER MOVEMENTS FROM UNSET CONCRETE INTO AN ANNULAR ZONE OF SOIL IMMEDIATELY SURROUNDING THE PILES. THESE TESTS INDICATED THAT WATER MOVEMENTS WERE NEGLIGIBLE, EXCEPT WHEN THE INITIAL WATER CONTENT OF THE COMPACTED SOIL (FOR THE TEST CUBES) WAS SEVERAL PERCENT LOWER THAN THE PLASTIC LIMIT OF THE SOIL. BOTH TENSION AND COMPRESSION LOAD TESTS WERE CONDUCTED ON SMALL PILES AND THE TENSION CAPACITY OF THE PILES WAS FOUND TO BE BETWEEN 0.6 AND 0.7 OF THE COMPRESSION PILE LOAD CAPACITY. OTHER SPECIAL TESTS WERE MADE TO OBSERVE THE NATURE OF SOIL DEFORMATION ADJACENT TO THE PILE SURFACE DURING A LOAD TEST AND THE PORTION OF THE PILE LOAD WHICH WAS RESISTED BY END-BEARING STRESSES AT THE BASE OF THE PILE. /AUTHOR/

Supplemental Notes:

Vol 36, pp 132-145, 10 FIG, 1 REF

Monograph Accession #:

01490404

Authors:

Dubose, L A

Editors:

Fred Burggraf
Elmer M Ward
Herbert P Orland

Publication Date:

1957

Serial:

Highway Research Board Proceedings

Volume: 36
Publisher: Highway Research Board

Uncontrolled Terms:

Old TRIS Terms:

Subject Areas:

Bridges and other structures; Highways

Files:

TRIS, TRB

Last Modified:

Aug 15 2013 2:41PM