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以三级超高加筋土挡墙（高５７ｍ）为例，进行了挡墙的填土含水量、颗粒分析和比重测定以及填土加筋（ＣＡＴ 复合筋带）和不加筋的固结不排水直剪试验；在填土未加筋、加一层筋和加二层筋时，按单级加荷剪切试验（单级剪）和分级加荷剪切试验（多级剪），分别进行了三轴不固结不排水剪切试验．对加筋土挡墙进行了有限元分析和计算．进行了加筋土挡墙的离心模型试验，试验分施工期和使用期，分别进行了填土土压力、面板和填土的沉降以及第一级加筋土挡墙上拉筋的受力分析．从加筋土基本原理、挡墙内部和外部稳定性方面，阐明土体加筋后的加固原理和挡墙的加固机理；叙述了挡墙的破坏形式，剖析了其破坏机制，进行了工程事故的原因分析． 进行了加筋土挡墙修复工程的现场试验，得出结论为：土体加筋后的抗剪强度指标ｃ值提高较大；挡墙墙背土压力呈两头小、中间大的分布规律；加筋土挡墙的变形比较大，是一种柔性结构：ＣＡＴ复合拉筋的拉力出现２个峰值，且墙高不同处的拉筋拉力不同；加筋土挡墙的设计应从内部稳定性和外部稳定性２个方面进行；提出了加筋土挡墙设计计算的方法和步骤：填土的密实度是影响拉筋拉力的主要因素之一；分析了加筋土挡墙的加固机理和破坏机制：加筋土挡墙是一种整体复合结构?
Taking the three-level ultra-high reinforced earth retaining wall (height 57m) as an example, the filling water content, particle analysis and gravimetric determination of retaining wall as well as the consolidation of reinforced soil (CAT composite reinforcement) and non-reinforced consolidation Drainage shear test (single-stage shear) and graded-plus-shear test (multi-stage shear) Three-axis unconsolidated undrained shear tests were carried out respectively. The finite element analysis and calculation of reinforced earth retaining wall were carried out. The centrifugal model test of reinforced earth retaining wall was carried out. During the construction period and the service period of the earthwork, the earth pressure, the settlement of the panel and fill, and the stress analysis of the tendons on the first reinforced earth retaining wall . From the aspects of the basic principle of reinforced earth, the internal and external stability of the retaining wall, the reinforcement principle and the strengthening mechanism of the retaining wall after the soil reinforcement are clarified; the destruction form of the retaining wall is described; the failure mechanism is analyzed; the engineering accident The reason analysis. The field tests of the reinforced earth retaining wall are carried out. The conclusion is: the c value of the shear strength index of the reinforced soil increases greatly; the pressure of the back earth retaining wall shows two small and middle distributions; The deformation of reinforced earth retaining wall is relatively large, which is a kind of flexible structure. There are two peaks of tensile force of CAT composite tensile reinforcement and different tensile strength of tensile reinforcement at different height of wall. The design of reinforced earth retaining wall should be based on internal stability and External stability of the reinforced earth retaining wall. The method and procedure of design and calculation of the reinforced earth retaining wall are proposed. The density of the earth filling is one of the main factors affecting the tensile force of the reinforcing steel bar. The reinforcement mechanism and failure of the reinforced earth retaining wall Mechanism: Reinforced earth retaining wall is a kind of overall composite structure?