At present, the method of calculating the turbulent flow width around the bridge pier is not given in the ＂Standard for Inland River Navigation＂ （GB50139-2004） in China, and the bridge designer usually increases t...At present, the method of calculating the turbulent flow width around the bridge pier is not given in the ＂Standard for Inland River Navigation＂ （GB50139-2004） in China, and the bridge designer usually increases the bridge span in order to ensure the navigation safety, which increases both of the structural design difficulty and the project investments. Therefore, it is extremely essential to give a research on the turbulent flow width around the bridge pier. Through the experiments of the fixed bed and the mobile bed, the factors influencing the turbulent flow width around the bridge pier have been analyzed, such as the approaching flow speed, the water depth, the angles between the bridge pier and the flow direction, the sizes of bridge pier, the shapes of the bridge pier, and the scouting around the bridge pier, etc. Through applying the dimension analytic method to the measured data, the formula of calculating the turbulent flow width around the bridge pier is then inferred.展开更多
Through the fixed bed and live bed experiments, the factors influencing the turbulent width around bridge piers were analyzed, including approaching flow velocity, flow depth, flow angle, size of piers, shape of piers...Through the fixed bed and live bed experiments, the factors influencing the turbulent width around bridge piers were analyzed, including approaching flow velocity, flow depth, flow angle, size of piers, shape of piers and scouring. The experiments demonstrated that the turbulent width increased with approaching flow velocity, water depth and size of piers, kept constant with different flow angles, decreased as the shape of piers became smoother, and was less remarkably influenced by the scouring. Through applying the dimensional analysis method, the empirical expression was developed to calculate the turbulent width around bridge piers.展开更多
基金Supported by the West Waterway Transportation Construction Foundation under Grant No.2004-328-000-40.
文摘At present, the method of calculating the turbulent flow width around the bridge pier is not given in the ＂Standard for Inland River Navigation＂ （GB50139-2004） in China, and the bridge designer usually increases the bridge span in order to ensure the navigation safety, which increases both of the structural design difficulty and the project investments. Therefore, it is extremely essential to give a research on the turbulent flow width around the bridge pier. Through the experiments of the fixed bed and the mobile bed, the factors influencing the turbulent flow width around the bridge pier have been analyzed, such as the approaching flow speed, the water depth, the angles between the bridge pier and the flow direction, the sizes of bridge pier, the shapes of the bridge pier, and the scouting around the bridge pier, etc. Through applying the dimension analytic method to the measured data, the formula of calculating the turbulent flow width around the bridge pier is then inferred.
基金National West Communication Construction Technology Project (No.200432800040)
文摘Through the fixed bed and live bed experiments, the factors influencing the turbulent width around bridge piers were analyzed, including approaching flow velocity, flow depth, flow angle, size of piers, shape of piers and scouring. The experiments demonstrated that the turbulent width increased with approaching flow velocity, water depth and size of piers, kept constant with different flow angles, decreased as the shape of piers became smoother, and was less remarkably influenced by the scouring. Through applying the dimensional analysis method, the empirical expression was developed to calculate the turbulent width around bridge piers.
