Inspection on the Complex Foundations of Overwater Bridges
Conference: Publication Date: 27 August 2018
The as-built condition of bridge foundations is important for bridge engineers to evaluate their capacity and stability in natural hazard events. Recently, two in-service old bridges with complex foundation conditions were subjected to scour risk found in biennial routine inspection. In response to the inspection findings, the bridge agencies needed to know their dimension information in order to assess their functional conditions for future improvement if needed. A two-phase near-surface geophysical inspection strategy, including electrical resistivity tomography and ultra-seismic inspection, was introduced to identify their foundation depths, even their types. The electrical resistivity tomography technique outlined the rough interface between bridge substructure and surrounding geological stratum at bridge sites at the first stage. A following ultra-seismic inspection provided a detailed information in determining the substructure depths. Combining these two inspection results, the whole investigation demonstrated useful and reliable conclusiveness in depth determination on unknown bridge foundations.
- Chinese Institute of Civil and Hydraulic Engineering (CICHE), 2010, Bridge Inspection Method and Application, Scientific and Technical Publishing Co., Ltd., Taipei, Taiwan.
- Hertlein, B.H. and Davis, A.G., 2006, Nondestructive Testing of Deep Foundations, John Wiley & Sons Ltd., Chichester, U.K.
- Olson, L.D., Jalinoos, F., and Aouad, M.F., 1998, Determination of Unknown Subsurface Bridge Foundations, NCHRP Project No. E21-5, Olson Engineering, Boulder, Colorado, U.S.A.
- Society of Exploration Geophysicists of Japan, 2014, Application Manual of Geophysical Methods to Engineering and Environmental Problems, European Association of Geoscienists & Engineers (EAGE), Houten, the Netherlands.
- Wightman, W.E., Jalinoos, F., Sirles, P., and Hanna, K., 2003, Application of Geophysical Methods to Highway Related Problems, Report No. DTFH68-02-P-00083, Central Federal Lands Highway Division, Lakewood, Colorado, U.S.A.
- Collin, J.G. and Jalinoos, F., 2014, Foundation Characterization Program (FCP): TechBrief #1- Workshop Report on the Reuse of Bridge Foundations, Report No. FHWA-HRT-14-072, McLean, Virginia, U.S.A.
- Schaefer, V.R. and Jalinoos, F., 2013, Characterization of Bridge Foundations Workshop Report, Report No. FHWA-HRT-13-101, McLean, Virginia, U.S.A.
- Boeckmann, A.Z. and Loehr, J.E., 2017, Current Practices and Guidelines for the Reuse of Bridges Foundations, NCHRP Synthesis 505, Transportation Research Board of the National Academies, Washington, D.C., U.S.A.
- Jalinoos, F., 2016, “Use of Geophysics for Foundation Characterization and Reuse,” Proceedings of the 29th Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2016), Denver, Colorado, U.S.A.
- Geo-Institute Deep Foundation Committee, 2000, “Nondestructive Evaluation of Drilled Shafts,” Journal of Geotechnical and Geoenvironmental Engineering, ASCE, 126(1), pp. 92-95.
- Wang, H., Wang, C.-Y., and Hu, C.-H., 2012, “Bridge Foundation Inspection and its Identification,” Proceedings of the 36th National Mechanics Conference, Chung-Li, Taoyuan, Taiwan, pp. R-009-1~R-009-6.
- Wang, H., Hu, C.-H., and Wang, C.-Y., 2015, “NDT-Based Identification on an Unknown Bridge Foundation,” The e-Journal of Nondestructive Testing, 20(11), pp. 888-896.
- Wang, H., Hu, C.-H., Hsieh, C.-H., and Hsieh, S.-H., 2016, “Depth Inspection on Scoured Bridges without Foundation Information,” Proceedings of the 29th Symposium on the Application of Geophysics to Engineering and Environmental Problems (SAGEEP 2016), Denver, Colorado, U.S.A., Paper ID No.: 38 (total 6 pages).
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