填土相对密实度对加筋土挡墙的影响研究

自加筋土出现以来，由面板、筋材、填土组成的加筋土挡墙被广泛研究并应于道路、铁路等土建工程中。填土的压实对加筋土挡墙的变形、土压力及筋材拉力等影响显著。为研究填土相对密实度对加筋土挡墙的影响，进行了3组不同相对密实度的离心模型试验，通过试验数据分析得到以下结论：相对密实度越大，墙体变形越小，特别是加载期变形量；压实可增大面板附近土体约束，使水平土压力大于设计值；试验挡墙设计较保守，筋材填土界面摩擦系数小于设计值；筋材面板之间连接拉力分析表明，连接拉力实测值小于测试土压力。

Centrifugal model test on influence of relative compactness on reinforced soil retaining walls

Since the emergence of reinforced soil, reinforced soil retaining walls, which are composed of panel facing, reinforcement and soil, have been widely studied and used in civil engineering such as road engineering and railway engineering. Soil compaction has a significant influence on the deformation, earth pressure, and reinforcement tensile force of reinforced soil retaining walls. In order to study the influence of soil relative compactness on reinforced soil retaining walls, three groups of centrifugal model tests with different soil relative compactness are carried out and the following conclusions have been drawn by analyzing the experimental data: the horizontal deformation of the panel facing decreases as soil relative compactness increases, especially in the loading period; the tested horizontal earth pressure values behind the panel facing are greater than the design values because of soil compaction; the tested reinforced soil retaining walls are conservative because the interface friction coefficient between the reinforcement and the soil is less than the value recommended by design codes; analysis shows that the connection force between reinforcements and panel facing is smaller than the value of horizontal earth pressure obtained from the model tests.