Abstract: With the rapid development of Highway Engineering in China, the slope instability of the embankment along the lake has become increasingly prominent. In this paper, the PLAXIS finite element analysis software is used to establish a two-dimensional plane strain analysis model, considering the influence of different water level rise and fall speed on the seepage characteristics and the stability of the embankment slope along the lake. The results show that: in the rising stage of water level, the infiltration line in the slope is concave, the seepage rate in the slope increases first and then decreases, and the slope stability coefficient decreases first and then increases; in the falling stage, the infiltration line in the slope is convex, the seepage rate in the slope increases first and then decreases, and the stability coefficient decreases first and then increases slightly. Thus, the change law of seepage characteristics and stability of Yanhu embankment slope under the condition of water level change is obtained, which can provide reference for the protection design of similar slope engineering in the future.

Key words: Slope Stability, Embankment Along the Lake, Water Level Change, Seepage Characteristics, Plaxis