关键词: 桥墩;壅水;壅高值;经验公式;汉江;

Abstract: The backwater of bridge pier has a certain influence on the flow capacity and water surface profile of the river channel,so it is very important to analyze backwater formulas of bridge pier and determine a reasonable empirical formula. In order to analyze the rationality of empirical formulas,according to the data of bridge pier backwater of Hanjiang River two times measured in October 2017,this paper compared and analyzed the backwater height and backwater length calculated by several commonly used empirical formulas. The result showed that the Henderson formula had a minimum calculation error of-0. 023 m,and the error percentage was only 12. 1%,that is,the Henderson formula was more consistent with the actual situation. The error of the empirical formula of backwater length was only 9. 3% at high water level,which was more reasonable than that at low water level.

Key words: bridge pier; backwater; backwater height; empirical formula; Hanjiang River;