噴射混凝土對深埋隧道噴殼結(jié)構(gòu)性能影響
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Influence of Shotcrete on Structural Performance of Shotcrete Shell in Deep Tunnel
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中圖分類號：U455 文獻(xiàn)標(biāo)志碼：A 文章編號：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
在新奧 法（New Austrian TunnellingMethod，NATM）中，噴射混凝土作為主要支護(hù)手段之一，通過直接噴射到圍巖上形成初期支護(hù)，起到穩(wěn)定隧道開挖面的作用[1-3]。（剩余16639字）