TY - GEN
T1 - Time-dependent scour depth under bridge-submerged flow
AU - Guo, J.
AU - Kerenyi, K.
AU - Shan, H.
AU - Xie, Z.
AU - Zhai, Y.
AU - Zhao, L.
N1 - Copyright:
Copyright 2014 Elsevier B.V., All rights reserved.
PY - 2010
Y1 - 2010
N2 - Current practice for determining the scour depth at a bridge crossing is based on the equilibrium scour depth of a design flood (e.g., 50-year, 100-year, and 500-year flood events), which is unnecessarily larger than a real maximum scour depth during a bridge life span since the peak flow period of a flood event is often much shorter than the corresponding scour equilibrium time. The objective of this study was to present a design method for time-dependent scour depth under bridge-submerged flow. To this end, a series of flume experiments on scour depth under bridge-submerged flow were conducted to collect scour data at different times. A semi-empirical model for estimating time-dependent scour depth was then presented based on the mass conservation of sediment, which agrees very well with the collected data. The proposed method can appropriately reduce the design depth of bridge scour according to design flow and a peak flow period, which can translate into significant savings in the construction of bridge foundations.
AB - Current practice for determining the scour depth at a bridge crossing is based on the equilibrium scour depth of a design flood (e.g., 50-year, 100-year, and 500-year flood events), which is unnecessarily larger than a real maximum scour depth during a bridge life span since the peak flow period of a flood event is often much shorter than the corresponding scour equilibrium time. The objective of this study was to present a design method for time-dependent scour depth under bridge-submerged flow. To this end, a series of flume experiments on scour depth under bridge-submerged flow were conducted to collect scour data at different times. A semi-empirical model for estimating time-dependent scour depth was then presented based on the mass conservation of sediment, which agrees very well with the collected data. The proposed method can appropriately reduce the design depth of bridge scour according to design flow and a peak flow period, which can translate into significant savings in the construction of bridge foundations.
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U2 - 10.1061/41147(392)9
DO - 10.1061/41147(392)9
M3 - Conference contribution
AN - SCOPUS:84890924145
SN - 9780784411476
T3 - Geotechnical Special Publication
SP - 105
EP - 114
BT - Scour and Erosion
T2 - 5th International Conference on Scour and Erosion
Y2 - 7 November 2010 through 10 November 2010
ER -