Research on the reinforcement scheme for the embankment of Huayuankou Section in the lower reaches of the Yellow River based on the construction method of cast-in-place pile

In response to the problems of traditional soil and rock structures in the Yellow River, such as bank protection and foot protection, which are easily eroded by water flow, resulting in root stone loss and slope instability, various rigid reinforcement measures for embankments were compared. Taking into account practicality, environmental protection and other factors, the Huayuankou dangerous project from Dike 92 to Dam 127 on the Yellow River was selected as a pilot project, and reinforced concrete bored cast-in-place pile were used to reinforce the current embankment. Based on the average annual flow rate (1 000 m³/s) and the flow rate during the water and sediment adjustment period (5 000 m³/s), two sets of protective root row pile configurations were designed considering erosion resistance and overturning stability. The research results provide a feasible embankment reinforcement plan for promoting the normalization of the meandering river channel in the lower reaches of the Yellow River and shaping a main channel that adapts to various flow rates.