To investigate the behavior of piles and the performance of the mechanically stabilized earth (MSE) walls under static and cyclic lateral loading, six reduced-scale model tests of single and group piles within the MSE walls were conducted inside a test box. In the single pile tests, a hollow aluminum tube as a pile was placed at a distance of 2D or 4D (D is pile diameter) behind the wall facing, while in the group pile tests, the piles were only placed at the distance of 2D with a spacing of 3.3D between the piles. The piles were subjected to static lateral loading only and cyclic lateral loading followed by static loading until failure. The test results showed that the lateral load capacity of each pile in the group pile test was approximately 60% that of the single pile, while the wall facing displacements and the geogrid strains in the group pile test were larger than those in the single pile test. The lateral pile capacity, the wall facing displacement, the strain in the geogrid, and the lateral earth pressure behind the wall facing in the static and cyclic loading tests were evaluated at the pile head displacement equal to 20%D.

为了研究桩的行为和机械稳定土 (MSE) 墙在静态和循环横向荷载下的性能，在测试箱内对 MSE 墙内的单桩和群桩进行了六个缩小比例模型试验。单桩试验中，将空心铝管作为桩放置在面墙后方2D或4D（D为桩径）的距离，而在组桩试验中，桩仅放置在2D的距离桩之间的间距为 3.3D。桩只承受静态横向载荷和循环横向载荷，然后是静载荷，直到破坏。试验结果表明，群桩试验中每根桩的侧向承载力约为单桩的60%，而群桩试验的墙体位移和土工格栅应变均大于单桩试验。在桩头位移等于 20%D 时，评估了静力和循环加载试验中的侧向桩承载力、面墙位移、土工格栅中的应变和面墙后面的侧向土压力。