潮流作用下桥墩局部冲刷深度公式研究
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摘要
河口感潮地区大型桥梁的建设对桥墩稳定性提出了更高的要求。在现有的国内外研究成果的基础上,借鉴国内外现有公式结构,从能量守恒的角度出发,建立了一种结构简单、物理意义清晰的潮流作用下桥墩局部冲刷深度新公式。利用最小二乘法,结合实测资料,拟合确定了公式参数,并对新公式进行了验证。验证发现新公式计算结果精度较高,能较好地反映实际情况,可作为实际应用的一种参考。
The construction of the large bridge in the estuary tidal areas puts forward higher requirements for the stability of bridge piers. On the basis of the existing research results in China and abroad, establishing a new formula of local scour depth at bridge piers under tidal flow with a simple structure and clear physical meaning from the view of energy conservation. Using the least squares method, combined with the measured data, the formula parameters are fitted and the new formula is validated. Through the verification, it is found that the formula has high accuracy and accords with the actualities. In conclusion, it can provide some reference for practical application.
The construction of the large bridge in the estuary tidal areas puts forward higher requirements for the stability of bridge piers. On the basis of the existing research results in China and abroad, establishing a new formula of local scour depth at bridge piers under tidal flow with a simple structure and clear physical meaning from the view of energy conservation. Using the least squares method, combined with the measured data, the formula parameters are fitted and the new formula is validated. Through the verification, it is found that the formula has high accuracy and accords with the actualities. In conclusion, it can provide some reference for practical application.
引文
[1] 朱炳祥. 国外桥墩局部冲刷计算研究的主要成果与进展[J]. 中外公路, 1985(5):51-59.
[2] 詹磊, 董耀华, 惠晓晓. 桥墩局部冲刷研究综述[J]. 水利电力科技, 2007,33(3):1-13.
[3] H. N. C. Breusers, G. Nicollet, H.W. Shen. Local Scour Around Cylindrical Piers[J]. Journal of Hydraulic Research, 1977, 15(3):211-252.
[4] 铁道科学研究院铁道建筑研究所. 桥墩局部冲刷计算[R]. 北京:铁道科学研究院,1984.
[5] 张佰战, 李付军. 桥墩局部冲刷计算研究[J]. 中国铁道科学, 2004, 25(2):48-51.
[6] U.C. Kothyari, R.J. Grade, K.G. Ranga Raju. Temporal variation of scour around circular bridge pier [J]. Journal of Hydraulic Engineering ASCE, 1992, 118(8):1096-1106.
[7] Melville B W, Chiew Y M. Time Scale for Local Scour at Bridge Piers[J]. Journal of Hydraulic Engineering, 2000, 126(10):59-65.
[2] 詹磊, 董耀华, 惠晓晓. 桥墩局部冲刷研究综述[J]. 水利电力科技, 2007,33(3):1-13.
[3] H. N. C. Breusers, G. Nicollet, H.W. Shen. Local Scour Around Cylindrical Piers[J]. Journal of Hydraulic Research, 1977, 15(3):211-252.
[4] 铁道科学研究院铁道建筑研究所. 桥墩局部冲刷计算[R]. 北京:铁道科学研究院,1984.
[5] 张佰战, 李付军. 桥墩局部冲刷计算研究[J]. 中国铁道科学, 2004, 25(2):48-51.
[6] U.C. Kothyari, R.J. Grade, K.G. Ranga Raju. Temporal variation of scour around circular bridge pier [J]. Journal of Hydraulic Engineering ASCE, 1992, 118(8):1096-1106.
[7] Melville B W, Chiew Y M. Time Scale for Local Scour at Bridge Piers[J]. Journal of Hydraulic Engineering, 2000, 126(10):59-65.