为研究钢管抗滑短桩加固滑坡体的受力特性，在中国地质调查局地质灾害防治技术中心完成了4组不同桩长的钢管抗滑短桩加固碎石土滑坡的室内物理模型试验。测试堆载施加的滑坡推力作用下桩后、前土压力和桩身应变，观察滑体前缘变形破坏形态，分析滑坡推力、桩前土体抗力和桩身弯矩的分布规律试验。结果表明，滑坡推力的分布和桩前土体抗力和桩身弯矩是“S”型分布，确定了抗滑短桩的危险截面。对比分析桩长变化钢管抗滑短桩的受力特性，初步拟定钢管短桩能发挥抗滑效果的桩长下限值，即钢管抗滑短桩位于滑体中的长度应不小于滑体厚度的2/3。

In order to study the mechanical characteristics of short anti-sliding steel pipe pile for stabilizing the slope, four groups indoor physical model tests of short anti-slide steel pipe pile for reinforcing debris landslide with different lengths are conducted in the geological disaster prevention technology center completion of China Geological Survey. Through measuring the soil pressure at the rear and fore of short anti-slide steel pipe pile with stress-strain sensors as the sliding force impelled by the heaped load, observing the deformation and failure of the leading edge of landslide in the whole experimental process, analyzing the distribution of landslide thrust, soil resistance at the fore of steel pipe pile and bending moment of short anti-slide steel pipe pile. The results show that the distribution of landslide thrust and soil resistance at the fore of steel pipe pile are triangular-quadrilateral, bending moment is S-shaped distribution; the maximum bending moment and the critical section of short anti-slide steel pipe pile which are located at the vicinity of the sliding surface. And comparative analysis of mechanical characteristics of short anti-slide steel pipe pile with length changing , the limit length value of short anti-sliding steel pipe pile can be developed which totally play the anti-sliding effect; that the length of short anti-slide steel pipe pile should be not less than 2/3 of the slip thickness.