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采用微型桩加固边坡是一种高效、经济合理的加固方式,但其桩径小,容易发生破坏。对此,通过物理模型试验研究其破坏模式,即单桩破坏、局部破坏、整体破坏,并探求影响破坏模式的因素。实验采用三排桩梅花形布置,桩间距10 D,锚固深度2/5桩长~([1])。通过实验发现并认识到,桩的破坏模式与桩间土的性状及排间距有关系,在土质条件好的前提下选择合理排间距可使三排桩受力均等,从而发挥微型桩加固效果,同时,在微型桩加固边坡的基础上适当进行护坡加固,可有效保持土的性状,使微型桩长期处于较好的受力状态。
The use of micro-piles to reinforce the slope is an efficient, economical and reasonable way of reinforcement, but its pile diameter is small, prone to damage. In this regard, through the physical model test to study the failure mode, that single-pile damage, local damage, the overall destruction, and explore the factors that affect the failure mode. The experiment uses three rows of piles arranged in a plum shape with a pile spacing of 10 D and an anchorage depth of 2/5 pile length ~ ([1]). Through experiments, it is found and realized that the failure mode of the pile is related to the traits of soil and the distance between the piles. Choosing a reasonable row spacing under the premise of good soil quality can equalize the stress of the three rows of piles, At the same time, slope reinforcement is properly carried out on the basis of micro-pile reinforcement slope, which can effectively maintain the soil properties and make the micro-pile in a better state of stress for a long time.