新型钻孔微型桩单桩极限承载性能的探讨

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中图分类号：TU473 文献标志码：A 文章编号：1005-8249（2025）04-0062-06

DOI：10.19860/j.cnki.issn1005-8249.2025.04.012

ZHAO Yucheng'，LIU Xuyang'，MA Zhaoyang²

（1. School of Civil Engineering， Shijiazhuang Tiedao University， Shijiazhuang O5O043， China; 2.Tangshan Planning and Architectural Design & Research Institute Co.，Ltd.， Tangshan O63OOO，China） Abstract：Thisstudyproposesandinvestigatesanovelmicropilestructure，which innovativelyutilizesasinglehelicalreinforceent bartoreplacethetraditionalreinforcementcage.UsingtheAbaqusfiniteelementanalysisplatform，atree-dimensionalumerical modelofthenovelboredmicropilewasestablished.Theodelwasemployedtosystematicallyinvestigateitsbearingperformance， failuremodes，loadtransfermechanisms，andkeyinfluencingfactors.Theresultsindicate thatthepilelength signfcantlyenhnces theupliftbearingcapacity；however，eyondacriticallength，thcapacityincreaseexhibitsadimnishinggrowthpateSingan appropriateinclinationangleforthepilebodycanefectivelyenhancefoundationstabilityAmong thepilesoilmaterialparameters， soilcohesionhasarlativelyminorifluenceonthebaringcapacitywilethefrictioncoeficientattepilesoilintefaceeertsa more substantial efect.The findings of this study can provide valuable references for related engineering practices.

Key words：novel single bored micro- pile；numerical simulations；ultimate bearing performance

0 引言

目前在架空输电线路中，软弱地基或地下水位较高地段多采用灌注桩基础，该基础施工方法传统，施工过程不利于环保，施工成本较高，且对于一些比较偏远的地方，灌注桩成孔机械也不易进入施工场地，会增加施工的难度。（剩余5606字）