The mechanical properties of stabilizing piles are directly affected by the spatial structure of the bedrock of landslides. To effectively reinforce landslides with a sandwich-type bedrock, the interaction mechanism between manually excavated stabilizing piles and the different types of bedrock must be investigated. The research presents experimental models of manually excavated stabilizing piles for two kinds of sandwich-type bedrock structures, namely hard rock–dominant interlayered bedrock (HDIB) and weak rock–dominant interlayered bedrock (WDIB). Six physical models with different bedrock structure types and dip angles θ were prepared to explore the influence of these two parameters on the pile-bedrock interaction mechanism. The mechanical properties of the pile were investigated based on the monitoring results of the earth pressure distributions against the piles and the bending moment distributions. The embedded section of the pile experiences a rotation subjected to lateral soil movement. The center point of the rotation in the HDIB is at a greater elevation than in the WDIB. The earth pressure in the HDIB appears to increase with dip angle θ but is similar to each other in the WDIB. The pile embedded in the HDIB exhibits flexible behavior, whereas the pile embedded in the WDIB exhibits rigid behavior. With the increase of dip angle θ in the WDIB material, the bending moment steadily rises followed by fluctuation. The maximum bending moment of the embedded section increases with θ. These results provide a basis for improving the design of manually excavated stabilizing piles in sandwich-type bedrock.

中文翻译：

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滑坡稳定桩与夹层基岩相互作用机理的试验研究

稳定桩的力学性能直接受滑坡基岩空间结构的影响。为了有效地加固夹心型基岩滑坡，必须研究人工开挖的稳定桩与不同类型基岩之间的相互作用机制。研究提出了两种夹层型基岩结构的人工开挖稳定桩的实验模型，即硬岩-主导层间基岩（HDIB）和弱岩-主导层间基岩（WDIB）。准备了六个不同基岩结构类型和不同倾角θ的物理模型，探讨这两个参数对桩基相互作用机制的影响。根据桩的土压力分布和弯矩分布的监测结果，研究了桩的力学性能。桩的嵌入部分经历了受横向土壤运动影响的旋转。HDIB 中的旋转中心点位于比 WDIB 更高的高度。HDIB 中的土压力似乎随着倾角 θ 增加，但在 WDIB 中彼此相似。嵌入 HDIB 的桩表现出柔性行为，而嵌入 WDIB 的桩表现出刚性行为。随着 WDIB 材料倾角 θ 的增加，弯矩稳定上升，然后波动。嵌入截面的最大弯矩随 θ 增加。