ABSTRACT
The high floodplains bank slope in Jingjiang Zhongzhouzi reaches of the Yangtze River consists of two kinds of soil. The upper part is the silty clay layer and the lower part is fine sand layer. In this paper, according to the features of dual soil structures and the water level variation in Jingjiang reaches of the Yangtze River, unsaturated-saturated seepage analyses were carried out by using the commercial program SEEP/W to study the change law of the slope seepage field during the river level fluctuation. The obtained porewater pressure fields were then imported into the limit equilibrium analysis program (MorgensternPrice method) to evaluate the change in the safety factor under the fluctuations of the river level. The research results have a great significance for the prediction of the slope stability of Jingjiang Reaches, and also provide a reference for the safety during the construction period of waterway regulation projects.
