American Society of Civil Engineers


Design, Setup, and Evaluation of a Data Acquisition Array for an Instrumented Test Pile Cluster


by Edward L. Hajduk, P.E., M.ASCE, (Assistant Professor, Department of Civil and Environmental Engineering, The Citadel, 171 Moultrie Street, Charleston, SC 29464) and S. G. Paikowsky, Sc.D., M.ASCE, (Professor, Geotechnical Engineering Research Laboratory, Department of Civil and Environmental Engineering, University of Massachusetts — Lowell, 1 University Avenue, Lowell, MA 01854)

pp. 1-16, (doi:  http://dx.doi.org/10.1061/40940(307)87)

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Document type: Conference Proceeding Paper
Part of: 7th FMGM 2007: Field Measurements in Geomechanics
Abstract: An instrumented test pile cluster was installed at a bridge reconstruction site in Newbury, Massachusetts, for a research program investigating long term time dependent pile capacity gain.. The pile cluster consisted of (i) three heavily instrumented test piles, (ii) a surrounding ground piezometer field, (iii) a static load testing frame, (iv) soil and surface acceleration and total pressure instrumentation, and (v) an on-site data acquisition array. A wide variety of data measurements and instrument types were used within the cluster, requiring several data acquisition systems that were combined into the on-site data acquisition array. The data acquisition array continually monitored the various types of gages permanently installed within the test piles and surrounding soils over the course of a testing program that lasted 20 months. In addition, temporary instrumentation, such as flat blade dilatometers and soil accelerometers, were also monitored by the data acquisition array for discrete periods over the length of the testing program. The paper describes the instrumented test pile cluster components and details the design and setup of the data acquisition array. The performance of the onsite data acquisition array is evaluated and lessons learned over the course of the project concerning the data acquisition are presented.


ASCE Subject Headings:
Data collection
Instrumentation
Piles