Physical model test study of debris landslide reinforcement with double row micro-piles

The stress deformation characteristics of micro-pile and the transmission law of the landslide are studied through three groups experiments of different piles spacing under double rows of micro-piles reinforcement debris landslide. The test results show that the thrust of landslide subjected to double rows of miniature piles is mainly concentrated in the area of 1/3 pile above the sliding surface, and the maximum moment of the pile is located near the sliding surface, and the pile groups all fail when the first row pile reaches its elastic stress limit. When the spacing between piles is 5d, the micro-pile group has the best shielding effect on the soil between piles. The pile groups can bear the largest thrust and the displacement of pile is the smallest. The distribution of the landslide thrust is the most reasonable among the piles, and its transfer coefficient α is between 0.5 and 0.7.