Geo-Congress 2020
Tolerable Movement Criteria of Shallow Bridge Foundations in Cohesionless Soils
Publication: Geo-Congress 2020: Foundations, Soil Improvement, and Erosion (GSP 315)
ABSTRACT
Settlement of structures built on soils is a subject of considerable interest to practicing engineers since excessive settlement is one of the most important problems in soil mechanics and can lead to serviceability problems or even failure states in the structure‘s foundations. Even though immediate settlement calculation is an important step in evaluating the usage of shallow foundations in cohesionless soils for bridge foundations, differential settlement, and angular distortion are the most effective parameters for the evaluation of bridge foundations. In this paper, the performance of six settlement prediction methods for spread footing foundations is verified by using compiled field data from research projects. Vertical settlements were measured on 20 footings (yielding 10 measurements of differential settlement) from seven bridges in the Northeast U.S. and one bridge in Ohio. The settlement prediction methods selected for settlement calculations for the spread footings on cohesionless soils for each footing site are compared with measured settlement values. The standard penetration test (SPT) is considered in this study for the selected settlement prediction methods. Statistical parameters corresponding to each of the six settlement prediction methods for both differential settlement and angular distortion are evaluated and summarized. The study shows considerable differences in accuracies for the six selected prediction methods. It can be concluded that two prediction methods showed better results than the others. In addition, the distributions of differential settlement for the two selected prediction methods for shallow bridge foundations are examined.
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ACKNOWLEDGMENT
The authors wish to acknowledge with thanks the help from Dr. Naresh Samtani and Dr. Alan Lutenegger, for providing the measured settlement data. Also, our deepest thankful to Dr. Maria Szerszen for providing valuable comments.
REFERENCES
AASHTO LRFD Bridge Design Specifications (2016). “American Association of State Highway and Transportation Officials”, Washington, D.C.
Ahmed, A. Y. (2013). “Reliability analysis of settlement for shallow foundations in bridges”. Ph.D. Dissertation, University of Nebraska-Lincoln, NE.
Ahmed, A. Y., Szerszen, M. M., Nowak, A.S. (2015). “Predicting Immediate Settlement on Spread Footings for Highway Bridges”. International Foundations Congress and Equipment Exposition (IFCEE) Conference, ASCE, pp. 1880-1894, San Antonio, Texas.
Braja, M. Das, and Nagaratnam Sivakugan (2007). “Settlement of Shallow Foundations on Granular Soils- an overview”. International Journal of Geotechnical Eng. No. 1, pp. 19-29.
Coduto P. Donald (2001). Foundation Design. Principles and Practices. Prentice –Hall New Jersey.
Douglas, D.J. (1986). “State –of-the –art”. Ground Engineering. Vol. 19, No. 2, pp. 2-6.
Gifford, D.C., Wheeler, J. R., Kraemer, S. R., and A. F. McKown (1987). “Spread Footings for Highway Bridges”. Final report FHWA/ RD-86 /185, US Department of Transportation, Federal Highway Administration.
Hough, B. K. (1959). “Compressibility as the Basis for Soil Bearing Value”. Journal of Soil Mechanics and Foundation Division. Vol. 85, No. 4, pp. 11-39.
Lutenegger J. Alan and DeGroot J. Dan (1995). “Settlement of Shallow Foundations on Granular Soils”. Final Report of Research Conducted for Massachusetts Highway Department.
Nowak, A.S. and Collins, K.R. (2013). “Reliability of Structures”, CRC Press, New York.
Samtani, N. C., Nowatzki, E A., and D. R. Mertz (2010). “Selection of Spread Footings to Support Highway Bridge Structures”. Final report FHWA-RC/TD-10-001, US Department of Transportation, Federal Highway Administration.
Schmertmann, J.H (1970). “Static Cone to Compute Static Settlement Over Sand”. Journal of Soil Mechanics and Foundation Division. ASCE, Vol. 96, No. 3, pp. 1011-1043.
Schmertmann, J.H., Hartman, J. P., and P.R. Brown (1978). “Improved Strain Influence Factor Diagrams”. Journal of Soil Mechanics and Foundation Division. ASCE, Vol. 104, No. 8, pp.1131-1135.
Sargand M. Shad and Masada Teruhisa. (2006). “Further Use of Spread Footing Foundation for Bridges Final Report FHWA-OH-2006/8, Ohio Department of Transportation and US Department of Transportation, Federal Highway Administration.
Tan, C.K. and Duncan, J.M. (1991). “Settlement of Footings on Sands: Accuracy and Reliability”. Proceedings of Geotechnical Engineering Congress. Colorado, No. 1, pp. 446.
Information & Authors
Information
Published In
Geo-Congress 2020: Foundations, Soil Improvement, and Erosion (GSP 315)
Pages: 389 - 400
Editors: James P. Hambleton, Ph.D., Northwestern University, Roman Makhnenko, Ph.D., University of Illinois at Urbana-Champaign, and Aaron S. Budge, Ph.D., Minnesota State University, Mankato
ISBN (Online): 978-0-7844-8278-0
Copyright
© 2020 American Society of Civil Engineers.
History
Published online: Feb 21, 2020
Published in print: Feb 21, 2020
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