In order to improve the understanding of the mechanism of h-type anti-slide pile to reinforce the slope, this type of anti-slide pile with different anchorage depth and distance between fore pile and back pile was investigated through model test by specially designed experimental apparatus. The test results indicate that the distribution of resistence and thrust acting on fore pile is triangular, and the resistence acting on back pile is rectangular. For the landslide thrust acting on back pile, there are three types of distribution; parabolic, parabolic with upper center of gravity and rectangular. Therefore, when the calculation pattern for the part of h-type pile above the potential slip surface is defined, the distribution of resistence and thrust acting on fore pile can be fixed as triangular, and the resistence acting on back pile can be fixed as rectangular. Whilst the distribution of landslide thrust acting on back pile should consider the influence of property of soil, anchorage depth and the distance between fore pile and back pile. Some conclusions drawn from this test can provide useful reference for the design of h-type anti-slide pile.%为了探讨h型抗滑桩加固滑坡体的作用机制,利用专门设计的物理模型试验装置,在室内进行了不同锚固深度、不同前后桩间距的抗滑桩模型试验.试验结果可以看出:粘聚力较大地层中h型抗滑桩前桩前侧抗力和后侧推力呈三角形分布,后桩的前侧抗力呈矩形分布,对于后桩的后侧推力试验中有抛物线、重心偏上的抛物线、矩形3种分布形式.由此可知,在确定粘聚力较大地层中h型抗滑桩结构计算图式时,前桩前侧抗力和后侧推力都可以按三角形分布计算,后桩前侧抗力按矩形分布计算,后桩后侧推力分布不仅要考虑滑体力学性质,还应根据抗滑桩锚固深度及前后桩间距具体分析.
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