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Description
Unknown bridge foundations present a unique challenge to Departments of Transportation (DOT) across the country since foundation characteristics are a necessary input to assess scour vulnerability and to develop appropriate scour countermeasures. A number of non-destructive testing techniques have evolved over time to address this challenge and evaluate unknown foundation type and geometry. The most comprehensive study of NDT methods for unknown foundations was performed as part of National Cooperative Highway Research Program (NCHRP) 21-05 in 2001. Since NCHRP 21-05 other case studies have expanded the literature and further advancements in computer software and hardware have improved NDT capabilities and reliability for unknown foundation evaluation. In particular, P-wave reflection imaging has the potential to provide higher resolution data and significantly more detail regarding the subsurface in both the laboratory and the field.
Content:-
DISCLAIMER
ACKNOWLEDGEMENTS
LIST OF FIGURES
LIST OF TABLES
EXECUTIVE SUMMARY
1. LITERATURE REVIEW
2. P-WAVE SYSTEM LABORATORY VERIFICATION
3. SELECTION OF PENNDOT BRIDGE FOUNDATION SITES FOR FIELD TESTING
4. DEVELOPMENT OF FIELD TESTING PROCEDURES
5. FIELD TESTING
6. DATA POST-PROCESSING AND PREDICTION OF FOUNDATION CHARACTERISTICS
7. APPLICATION OF RESEARCH RESULTS TO DISTRICT 6 BRIDGES WITH UNKNOWN FOUNDATIONS
REFERENCES
Author Details
"Joseph T. Coe, Ph.D. (PI)"
"Jonathan E. Nyquist, Ph.D. (co-PI)"
"Behnoud Kermani"
"Lorraine Sybrandy"
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