中文摘要：

为研究模块面板式土工格栅加筋土挡墙在墙顶局部荷载作用下的受力和变形状态,并了解其作用机制,通过室内模型试验,进行了包括墙面水平变形和墙顶竖向沉降以及墙体内垂直和水平土压力、附加应力扩散角、侧向土压力系数、土工格栅拉伸应变等分布规律的研究和分析。试验结果表明：墙面累积水平位移沿墙高呈上大下小分布;水平和垂直土压力沿筋长方向均呈从拉筋中部向两端逐渐减小的分布趋势;实测附加应力扩散角较非加筋土体大,基本在40°~75°之间;侧向土压力系数沿墙高的分布在不同断面有所不同;筋材应变沿筋长呈单峰值分布,峰值出现位置距墙脚的水平距离从高到低逐渐减小。

英文摘要：

In order to investigate the behavior of geogrid-reinforced soil retaining wall with concrete-block panel under local loads and the related interaction mechanism, laboratory model tests are conducted to determine the distribution of the panel lateral displacement, the vertical settlement of the top of wall, the vertical and horizontal soil pressure, the diffusion angle of additional stress, the coefficient of lateral soil pressure and the tension strain of geogrids. The results show that the cumulative lateral displacement of the panel increases gradually from the bottom to the top. The distribution of vertical and horizontal soil pressures along the geogrid length shows a decreasing trend from the middle portion to both ends. The measured diffusion angle of additional stress, which ranges from 40° to 75°, is greater than that of soil mass without geogrids. The distribution of the lateral soil pressure coefficient is different in different sections. The distribution of geogrid strain along its length can be represented by a curve of single-peak, where the horizontal distance between the position of peak and the wall foot decreases gradually from the top to the bottom.