00646035

Component

http://onlinepubs.trb.org...trr/1993/1415/1415-009.pdf

https://scholar.google.co...hert&publication_year=1993

Sonic echo, sonic mobility, dynamic impedance function, and impedance log tests were used to estimate the length, diameter, low-strain stiffness, and existence of defects for two drilled shafts. An overview of the data acquisition, processing, and interpretation procedures for each test is presented. The length measurements agreed well with the design length of one shaft but underestimated the length of the second shaft, possibly because the shaft was socketed into rock. Impedance log tests provided the most accurate diameter measurements that agreed remarkably well with the diameters backcalculated from the volume of concrete. Values of the low-strain axial stiffness were nearly the same for both shafts, but were higher than the stiffnesses observed in the static load tests because of the different strain levels involved in each test.

This paper appears in Transportation Research Record No. 1415, Field Performance of Structures and Nondestructive Evaluation of Subsurface Infrastructure. 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

01403264

English

p. 69-77

1993

Transportation Research Record

0309055644

Figures (9) ; References (9) ; Tables (3)

Accuracy; Data collection; Defects; Diameter; Electrical impedance; Information processing; Length; Mechanical impedance; Nondestructive tests; Sonic tests; Stiffness; Test procedures

Drilled shafts; Interpretation

Bridges and other structures; Geotechnology; Highways; I20: Design and Planning of Transport Infrastructure; I42: Soil Mechanics

TRIS, TRB

Apr 7 1994 12:00AM

• CUT-AND-COVER TUNNEL SUBGRADE MODELING
• DYNAMIC RESPONSE MEASUREMENTS AND IDENTIFICATION ANALYSIS OF A PAVEMENT DURING FALLING-WEIGHT DEFLECTOMETER EXPERIMENTS
• EVALUATION OF CULVERT DEFORMATIONS USING THE FINITE ELEMENT METHOD
• FIELD PERFORMANCE OF CAST-IN-PLACE NONREINFORCED CONCRETE PIPE
• LOAD REDUCTION ON RIGID CULVERTS BENEATH HIGH FILLS: LONG-TERM BEHAVIOR
• LONG-TERM BEHAVIOR OF LARGE-SPAN CULVERTS IN COHESIVE SOILS
• PIPELINE RESPONSE TO UNDERMINING AT EXCAVATION CROSSINGS
• POSTFAILURE BEHAVIOR OF BURIED PIPE
• SKEW EFFECTS ON BACKFILL PRESSURES AT FRAME BRIDGE ABUTMENTS
• STRESS-WAVE NONDESTRUCTIVE TESTING OF TUNNELS AND SHAFTS
• TENSIONED WIRE SYSTEM FOR MONITORING TUNNEL MOVEMENT
• TOMOGRAPHIC IMAGING STRESS CHANGES IN SOIL MEDIA