Abstract:Taking the comprehensive improvement project of a coastal zone in Qingdao as an example, the section scheme of a high slope seawall is studied. From the perspectives of external slope protection and overall stability, the current situation analysis and scheme comparison are conducted. Through the physical model experiments and finite element calculations, it is proposed that when the slope of the seabed in front of the embankment is steeper than 1/50, the wave height increases rapidly with the decrease of water depth, and the actual value of wave runup is greater than the calculated value in the specifications. The protection height should be further determined in combination with the physical model experiments. The wave runup area is protected by a protective block, and the splash area is equipped with three-dimensional soil and water conservation blanket for splashing. Under the condition of limited width of the embankment, the sloping and reinforced soil replacement is a feasible solution for slope treatment. After the geogrid reinforcement, the overall stability safety factor of the seawall is increased by 5.1%. The rationality of the scheme is demonstrated from the perspectives of structural safety, economy, and ecology.
