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本文在分析基坑开挖过程中围护结构变形、坑边地表沉降及土压力变形规律的基础上,着重总结了基坑发生桩侵限的原因及其所带来的危害。在总结接桩法、补桩法等桩侵限处理方法的基础上,提出了力传递法和增设锚索法,并对增设锚索法作用机理进行了分析,总结了各种处理方法的优缺点及使用条件。最后用工程实例证明了力传递法和增设锚索法的有效性及合理性,为类似工程积累了经验。
Based on the analysis of the deformation of the retaining structure, the surface settlement at the edge of the pit and the deformation of earth pressure during the excavation of the foundation pit, the paper summarizes the reasons and the hazards brought by the piles. On the basis of summarizing the method of pile-in-pile and pile-up, the paper puts forward the force transfer method and the additional anchor method, and analyzes the action mechanism of the additional anchor method, summarizes the advantages of various processing methods Disadvantages and conditions of use. Finally, the engineering examples are used to prove the validity and rationality of the force transfer method and the additional anchor method, and accumulate experience for similar projects.