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微型桩被广泛应用于边坡加固、基坑围护、地基处理等工程领域,取得了较好的工程效果。目前,关于微型桩的设计研究工作相对滞后,一般只考虑单桩的作用而忽略了桩—土共同作用。本文阐述微型桩在边坡工程中的加固机理、微型桩的受力特征和破坏模式,并根据普通抗滑桩桩间距确定方法中的土拱效应来考虑微型桩的桩-土共同作用,提出了微型桩的合理桩间距确定方法,并对最大桩间距的影响因素进行了系统分析,对工程实例的分析表明研究成果可为类似工程提供参考。
Micro-pile is widely used in slope reinforcement, foundation pit support, foundation treatment and other engineering fields, and achieved good engineering results. At present, the research work on the design and construction of micro-piles is relatively lagging. Generally, only the function of single piles is considered while the interaction between piles and soil is neglected. In this paper, the reinforcement mechanism of micro-piles in slope engineering, the stress characteristics and failure mode of micro-piles, and the soil-arching effect in the method of determining the anti-slide pile spacing are considered to consider the interaction between piles and soil. The method to determine the reasonable pile spacing of micro pile is analyzed. The influencing factors of the maximum pile spacing are systematically analyzed. The analysis of the project examples shows that the research results can provide reference for similar projects.