Local scour around two side-by-side cylindrical bridge piers under ice-covered conditions |
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| Authors: | Mohammad reza Namaee Jueyi Sui |
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| Affiliation: | 1. Department of International, Environmental and Agricultural Sciences, Graduate School of Agriculture, Tokyo University of Agriculture and Technology, Japan;2. Department of Pesticide Residues and Environmental Pollution, Central Agricultural Pesticide Laboratory, Agriculture Research Center, Egypt;3. Department of Agricultural and Environmental Engineering, United Graduate School of Agricultural Science, Tokyo University of Agriculture and Technology, Japan;4. Department of Civil and Environmental Engineering, Faculty of Science and engineering, Kasetsart University, Chalermphrakiat Sakon Nakhon Provice Campus, Thailand;5. Department of Disaster Prevention, Meteorology and Hydrology, Forestry and Forest Products Research Institute, Matsunosato 1, Tsukuba, Ibaraki 305-8687, Japan;1. State Key Laboratory of Hydroscience and Engineering, Tsinghua University, Beijing 100084, China;2. Southwest University of Science and Technology, 59 Qinglong Road, Mianyang 621010, Sichuan, China;1. Institute of Hydrology and Water Resources, Department of Hydraulic Engineering, School of Civil Engineering, Tsinghua University, Beijing 100084, China;2. Department of Mechanical Engineering, Aligarh Muslim University, Aligarh 202002, India;3. Department of Earth Sciences, Indian Institute of Technology Roorkee, Roorkee 247667, India;1. U.S. Army Engineer Research and Development Center, Environmental Laboratory, Wetlands and Environmental Technologies Research Facility, ATTN: CEERD-EE-C, 3909 Halls Ferry Road, Vicksburg, MS, 39180-6199, USA;2. Louisiana State University, Department of Oceanography and Coastal Science, College of the Coast and Environment, Energy Coast and Environment Building, Baton Rouge, LA, 70803, USA;3. U.S. Army Engineer Research and Development Center, Environmental Laboratory, San Francisco, CA, USA;1. Department of Civil Engineering, Case Western Reserve University, 2104 Adelbert Road, Bingham 269, Cleveland, OH 44106-7201, United States;2. Department of Civil Engineering, Case Western Reserve University, 2104 Adelbert Road, Bingham 206, Cleveland, OH 44106-7201, United States;1. Ocean College, Zhejiang University, Hangzhou, 310058, China;2. Civil and Environmental Engineering, Lehigh University, Bethlehem, PA, USA |
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| Abstract: | In the current study, 108 flume experiments with non-uniform, cohesionless sediments have been done to investigate the local scour process around four pairs of side-by-side bridge piers under both open channel and ice-covered flow conditions. Similar to local scour around bridge piers under open channel conditions and a single bridge pier, it was observed in the experiments that the maximum scour depth always occurred at the upstream face of the pier under ice-covered conditions. Further, the smaller the pier size and the greater the spacing distance between the bridge piers, the weaker the horseshoe vortices around the bridge piers, and, thus, the shallower the scour holes around them. Finally, empirical equations were developed to estimate the maximum scour depth around two side-by-side bridge piers under both open channel and ice-covered flow conditions. |
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| Keywords: | Bridge pier Local scour Maximum scour depth Non-uniform sediment Roughness of cover Scour pattern |
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