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介绍了微型桩的优点及其在建筑物增层改造、不均匀沉降事故、地下洞室处理中的应用，提出微型桩承载力的建议公式，以及微型桩与上部结构连接的构造要求。
This paper introduces the advantages of micropiles and their application in building layer modification, uneven settlement accidents, and underground cavern handling. The proposed formulas for the bearing capacity of micropiles and the structural requirements for the connection between micropiles and superstructures are proposed.