A platform for research: civil engineering, architecture and urbanism
A platform for research: civil engineering, architecture and urbanism
Geotechnical considerations in hydraulic modeling of bridge abutment scour
Scour-related failure of earthen abutments in bridge waterways involves interacting geotechnical and hydraulic processes. Current bridge design guides, however, inadequately account for geotechnical factors influencing scour depth. Our paper presents results of laboratory experiments investigating how soil strength affects scour depth at spill-through abutments. We focus on several difficulties faced when conducting flume experiments on scour at abutments formed of erodible soil. The difficulties include attaining scale-reduced shear strengths, controlling soil compaction, and quantifying the shear strength of model soil. We indicate the similitude considerations involved, and describe a process of soil tests relating model soil strength to soil compaction that uses hand-held devices to determine soil strengths. The correlations developed between soil compaction and shear strength helped to work around some of the difficulties in flume experiments. We suggest practical solutions to issues pertaining to simulating the shear strength of compacted soils used in flume studies of abutment scour.
Geotechnical considerations in hydraulic modeling of bridge abutment scour
Scour-related failure of earthen abutments in bridge waterways involves interacting geotechnical and hydraulic processes. Current bridge design guides, however, inadequately account for geotechnical factors influencing scour depth. Our paper presents results of laboratory experiments investigating how soil strength affects scour depth at spill-through abutments. We focus on several difficulties faced when conducting flume experiments on scour at abutments formed of erodible soil. The difficulties include attaining scale-reduced shear strengths, controlling soil compaction, and quantifying the shear strength of model soil. We indicate the similitude considerations involved, and describe a process of soil tests relating model soil strength to soil compaction that uses hand-held devices to determine soil strengths. The correlations developed between soil compaction and shear strength helped to work around some of the difficulties in flume experiments. We suggest practical solutions to issues pertaining to simulating the shear strength of compacted soils used in flume studies of abutment scour.
Geotechnical considerations in hydraulic modeling of bridge abutment scour
Ng, K.W. (author) / Chakradhar, R. (author) / Ettema, R. (author) / Kempema, E.W. (author)
Journal of Applied Water Engineering and Research ; 3 ; 132-142
2015-07-03
11 pages
Article (Journal)
Electronic Resource
English
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