水位下降时堤防稳定性研究

The Stability Study of Dike During Drawdown

对水位下降时长江堤防某断面的稳定性进行了分析。这对今后堤防工程的维护和治理有一定的参考价值。

This thesis analyzes the stability of a dike section in Yangtze River during drawdown, Finite element method is used to analyze the seepage flow and to find the pressure head in seepage field, at the same time the influence of seepage force is considered when the simplified Bishop Method is used . The result indicates： the trend of the stability coefficient reduces firstly and then increases with the slow falling of water level（water head reduce） ; The holistic stability coefficient reduces when the wateris falling swiftly. The safety of the bank is lower. Such a study may has reference value for dike maintenance.