台阶式超高加筋土挡墙的应用及后评价

Application and post evaluation on step type super-elevation reinforced earth retaining wall

阐述了总高为45 m的台阶式加筋土挡墙在工程中的应用情况。论述了该超高大挡墙选择台阶式结构的原因,分析了整体型钢塑土工格栅的优点及布筋方式,探讨了Y形嵌锁类预制面板的优点以及土质类型对加筋体整体性与稳定性的影响。从而说明了加筋材料、布筋方式、面板形式、土质类型和完善的防排水设计都是超高大加筋土挡墙设计中必须考虑的因素。研究同时表明,数值稳定性分析和后期监测是验证台阶式高大挡墙整体稳定性的有效方式。

This paper describes the application of the reinforced earth retaining wall with 45 m in engineering. It discusses the reasons of selecting the structure form of the super large retaining wall,analyzes the advantages and reinforcement methods of integral plastic geogrid,discusses the advantages of Y shaped interlocking prefabricated panel and the influence of soil class types on the integrity and stability of reinforcement.Thus,the key factors that must be taken into account in the design of reinforced earth retaining wall are to explain the design of reinforced earth retaining wall,which is the reinforced material,the way of reinforcement,the form of the panel,the type of soil and the improvement of the waterproof and drainage design. The study also shows that the numerical stability analysis and the later period monitoring are the effective ways to verify the overall stability of the stepped high wall.