中文摘要：

为了研究模块面板式土工格栅加筋土挡墙在高速铁路列车载荷作用下的动力响应规律,分析其作用机理。结合室内模型试验进行了包括加筋土挡墙墙面变形、墙体加速度、动土压力、残余土压力及土工格栅拉伸应变等分布规律的研究。结果表明：墙面累积水平位移沿墙高呈单峰值分布,最大值位置靠近墙顶;挡墙内竖向加速度受频率影响较大,8 Hz时加速度出现大幅增长,加筋体内加速度沿墙高出现衰减;动土压力主要受载荷幅值及加载次数的影响,在加筋体内沿墙高逐渐衰减,垂直动土压力的衰减速率逐渐增加,水平动土压力的衰减速率逐渐减小;随加载次数的增加,残余土压力逐渐增大,沿墙高墙体中部的残余土压力稍大;筋材累积应变随加载次数的增加略微减小,沿筋长呈单峰值分布,峰值位置距墙脚水平距离从高到低逐渐减小。

英文摘要：

In order to study dynamic behaviors of a geogrid reinforced soil retaining wall with concrete-block panels under train loads of high speed railway and analyze their mechanism,a series of tests involving deformation of wall face,wall body acceleration,dynamic soil pressure,residual soil pressure and tension strain of geogrids,were conducted with model tests in laboratory. Test results showed that the cumulative horizontal displacements of the wall face reveal a distribution of single-peak,and the max-value position is close to the wall top; the vertical acceleration of the wall is affected by load frequency and increases obviously when the load frequency is 8 Hz,and the acceleration decreases along the wall height in the reinforcement body; the dynamic soil pressure is mainly affected by load amplitude and load cycle number and decreases gradually along the height wall; the attenuation rate of the vertical dynamic soil pressure gradually increases and that of the horizontal dynamic soil pressure gradually decreases; with increase in load cycle number,the residual soil pressure increases gradually,and it is bigger in the middle portion along the wall height; the cumulative strain of the geogrid decreases slightly with increase in load cycle number,and reveals a distribution of single-peak along the geogrid length; the horizontal distance between the position of peak and the wall foot gradually decreases from higher position to lower one.