喷射混凝土对深埋隧道喷壳结构性能影响

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Influence of Shotcrete on Structural Performance of Shotcrete Shell in Deep Tunnel

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中图分类号：U455 文献标志码：A 文章编号：1005-8249（2025）01-0098-07

DOI：10.19860/j.cnki.issn1005-8249.2025.01.019

YU Rongchun，HUANG Yanhui， LIU Qiang(Guangxi Vocational & Technical Institute of Industry， Nanning 53OOO1， China)

Abstract：Toinvestigatetheimpactofshotcreteconstiutivemodelsonthepredictionofdisplacementandstressinshoterete shells ofdeep-buriedtunnels，atwo-dimensionalfiniteelement simulation wasconducted basedontheNew Austrian Tunneling Method（NATM)．Thestudyanalyzedthediferencesindisplacementandstressevolutionpredictionsresultingfrom various shotcrete models.Thesimulationresultsindicatethatthelinear elasticmodelmayoverestimate theshel’stifness， whereas modelsaccounting fortime-dependentcharacteristics beterreflectactualconditions.The SCDPandSchdlich models exhibit similarresultsin short-termresponses，while the Meschke model demonstrates higherrigidity；however，itscrep efctlimitsthestresstate.Bycomparingtheinflunceofdiferentshotcrete modelsonthemechanicalperformanceofshotcrete shells，the studyprovides amoreacurate predictive approach，contributingto theoptimizationoftunnelconstruction anddesign and enhancing the safety and reliability of engineering projects.

Key words：rock mass；deep tunneling；shotcrete；damage-plasticity model；Hoek -Brown failure criterion

0 引言

在新奥 法（New Austrian TunnellingMethod，NATM）中，喷射混凝土作为主要支护手段之一，通过直接喷射到围岩上形成初期支护，起到稳定隧道开挖面的作用[1-3]。（剩余16639字）