基于折疊突變理論的雙應(yīng)變軟化夾層隧道圍巖穩(wěn)定性分析

中圖分類號：U25 文獻(xiàn)標(biāo)志碼：A 文章編號：1005-8249（2025）02-0067-07

DOI：10.19860/j.cnki.issn1005-8249.2025.02.012

Abstract：Thestrainsofteningcharacteristicsof weak interlayersmaketunnelsurroundingrock excavationprone toacidentssuch asroffallandcollapse.Basedontheprincipleofpotentialenergyandtheconstitutiverelationshipofstrainsoftening characteristics，afoldedcatastrophemodelforthecombinationofdualstrainsoftening interlayersisestablishd，andacriterionfor catastrophicinstabilityoftunelsuroundingrockisderived.Theresultsshowthatthedisplacementof thedoublestrainsoftening interlayermainlychangesneartheweak interlayer.Asthediferenceinshearmodulusbetweentheweakinterlayerandthe surroundingrock massincreases，thereisalocalincreaseindisplacementattheinterlayer；Thesmalertheshear modulus，the moreproethesurroundingrockistosudeninstability；Thecollapsecatastrophetheorybasedcriterionforsurroundingrock instabilityindoublestraineak intercalatedtunelsisaplicableandcanbeusedasasupplementojudgetestabilityofsuouding rock.Theresearchresultscanprovide guidanceandreferenceforthedesignandconstructionofsimilartunel projects inthefuture.

Keywords：weak intercalation；double strainsoftening；instabilityof suroundingrock；folding mutation model；instability criterion

0 引言

近年來，隨著隧道建設(shè)的迅猛發(fā)展，安全事故也頻繁發(fā)生。（剩余6842字）