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A platform for research: civil engineering, architecture and urbanism
Performance Evaluation of an Instrumented Test Pile Cluster
As part of a research project investigating time dependent pile capacity gain, heavily instrumented test pile cluster was installed at a bridge reconstruction site in Newbury, Massachusetts. The test pile cluster consisted of (i) three-instrumented test piles, (ii) a surrounding ground piezometer field, and (iii) a complex data acquisition array to monitor the instrumentation. An extensive testing program, which included various static, dynamic, and Statnamic tests, was carried out over a lengthy time period to determine the pile capacity with time. Electrical resistance, piezo-electric, piezo-resistive, and vibrating wire instruments were used throughout the cluster to record acceleration, displacement, pressure, and strain within the test pile cluster. Primary test pile instrumentation consisted of an alternating pattern of piezometers and strain gages. Auxiliary instrumentation within the piles included accelerometers and total pressure gages. The ground piezometer field consisted of a total of 10 vibrating wire pressure transducers installed within normally consolidated and silty sand soil layers. Four separate data acquisition systems were assembled into an on-site data acquisition array to monitor the instrumentation throughout the testing period. This paper details the maximum loading conditions that each individual test pile was subjected to over the course of the testing program and evaluates the performance of the individual gage models and designs, instrument types, and data acquisition systems. Conclusions are drawn regarding (i) the reliability of the various gages and gage types, (ii) the performance of similar gage types, (iii) the selected measurement frequencies for each gage type, and (iv) the performance of the data acquisition array during the harsh conditions of driving and testing over time.
Performance Evaluation of an Instrumented Test Pile Cluster
As part of a research project investigating time dependent pile capacity gain, heavily instrumented test pile cluster was installed at a bridge reconstruction site in Newbury, Massachusetts. The test pile cluster consisted of (i) three-instrumented test piles, (ii) a surrounding ground piezometer field, and (iii) a complex data acquisition array to monitor the instrumentation. An extensive testing program, which included various static, dynamic, and Statnamic tests, was carried out over a lengthy time period to determine the pile capacity with time. Electrical resistance, piezo-electric, piezo-resistive, and vibrating wire instruments were used throughout the cluster to record acceleration, displacement, pressure, and strain within the test pile cluster. Primary test pile instrumentation consisted of an alternating pattern of piezometers and strain gages. Auxiliary instrumentation within the piles included accelerometers and total pressure gages. The ground piezometer field consisted of a total of 10 vibrating wire pressure transducers installed within normally consolidated and silty sand soil layers. Four separate data acquisition systems were assembled into an on-site data acquisition array to monitor the instrumentation throughout the testing period. This paper details the maximum loading conditions that each individual test pile was subjected to over the course of the testing program and evaluates the performance of the individual gage models and designs, instrument types, and data acquisition systems. Conclusions are drawn regarding (i) the reliability of the various gages and gage types, (ii) the performance of similar gage types, (iii) the selected measurement frequencies for each gage type, and (iv) the performance of the data acquisition array during the harsh conditions of driving and testing over time.
Performance Evaluation of an Instrumented Test Pile Cluster
Hajduk, Edward L. (author) / Paikowsky, Samuel G. (author)
Specialty Conference on Performance Confirmation of Constructed Geotechnical Facilities ; 2000 ; Amherst, Massachusetts, United States
2000-04-03
Conference paper
Electronic Resource
English
Performance Evaluation of an Instrumented Test Pile Cluster
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