A study of the physical model test of debris landslide reinforcement with three row micro-piles

The stress deformation characteristics of micropile and the transmission law of a landslide are studied through three groups of experiments of different piles spacing under three rows of a micropile reinforcement debris landslide. The test results show that the landslide thrust and pile bending moment gradually increases from top to bottom in the direction of the buried depth of the pile. When the spacing between piles is 5d, the interaction effect between pile and soil is the best, the displacement of the top of the pile is minimum, and the thrust of the landslide is the most reasonable. When the landslide thrust transfer coefficients α and β are in (0.54, 0.71) and (0.27, 0.49), respectively, the micro pile can withstand landslide thrust the greatest and skid is better.