关键词: 微型桩, 滑坡加固, 边坡工程, 参照系数, 模型试验

Abstract: The physical model tests on loess and expansive soil colluvial?slope reinforced by micro-pile were carried out respectively. The reinforcing mechanism and the bearing deformation difference of micro-pile are studied for the two types of landslides. Taking pile top displacement as the main factor and considering relationship between the soil pressure in front of pile and the bending moment of pile, we propose a reference coefficient that could be applied in design of micro-pile reinforcement. The results show that when the pile top displacement is too large, the bending moment of pile near the sliding surface increases rapidly until the piles fail. Under the same pile spacing, row spacing, anchoring depth and layout form, the reference coefficient of the two types of landslides is 1.45 to 2.45.

Key words: micro-pile, landslide reinforcement, slope engineering, reference coefficient, model test