黄河堤防渗流浸润线分析

Analysis on Phreatic Line of the Yellow River Embankments

长期以来,黄河下游堤防加固设计中,一直沿用平工1:8、险工1:10的浸润线比降作为大堤渗流控制的标准。本文根据二维稳定渗流和不稳定渗流计算以及1958年洪水时堤防的渗流情况对此标准进行了分析验证。结果表明,平工堤段浸润线比降按1:7控制即可满足要求;险工、老口门等堤段浸润线比降仍按1:10控制。

The slope of phreatic line is always 1: 8 for ordinary works and 1: 10 for vulnerable spots that are the standard for byke seepage control in the design of strengthening the lower Yellow River embankments over a long period of time.Through analysis and verification, the author has put forward a standard based on the calculation of two-dimensional steady and unsteady seepage and the seepage occurred in 1958' s flood that the 1: 7 slope of phreatic line of ordinary works which can meet the requirements can be taken as a controlling standard: and the slope of phreatic line of vulnerable spots and old breached sections is still the same as 1: 10 for controlling.