高地应力软岩隧道大变形控制技术研究

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中图分类号：U455.7 文献标志码：A 文章编号：2095-2945（2025）26-0099-04

Abstract：Largedeformationofsoftrockwithhighgroundstressisaconstructionproblemfacedbytunnelswithunfavorable geologicalconditions.Asthegeologicalconditionsoftunnelconstructionbecomemoreandmorecomplex，largedeformation disastershavebecomeakeyproblemthatneedstobesolvedintunnelconstruction.Researchonlargedeformationcontrol measuresisimportanttoensureconstructionsafetyandreduceconstructioncostsplayanimportantrole.TakingtheDaliangshan Tuneli Southwest Chinaasanexample，thispaperuses FLAC3Dnumericalanalysisandother methods tocarryoutresearch onlargedeformationcontrol measures forsoftrock.Theresearchresultsshow thatthecompositesupporting structurecanreduce the plastic zone of surrounding rock by 61.24% ，andthe tunnel deformation byabout 50% ，field applications show that with the increaseofsupportlength，thedouble-layerinitialsupportstructurecanefectivelycontrolthelargedeformationofweak surroundingrock withhigh groundstress.Theaboveresearchresultsshowthatthedouble-layered initialsuportingstructurecan effectivelycontroltheoccurrnceoflargedeformationofsuroundingrockandcanprovidedesignreferenceforsimilarprojects.

Keywords：highground stresslarge deformationof softrock；deformation control;numerical analysis；plastic zone

我国西南地区地质条件复杂，在隧道施工中通常面临高地应力、软弱围岩、断裂构造及地下水等不良地质情况，尤其是高地应力下的软弱围岩隧道极易发生大变形灾害，因此，开展软岩大变形的支护技术研究对于预防不良地质条件隧道变形控制具有重要意义。（剩余3537字）