Model Test Study on In-service Karst Highway Tunnel

Electronic journal of geotechnical engineering

关键词: in-service tunnel;    highway tunnel;    karst cave;    similar model test;   

DOI  :  

来源: Oklahoma State University

【 摘 要 】

Thisarticle,basedontheBaishanTunnel,optimizedtheselectionforthesimilarmaterialsofkarstcavesfiller,surroundingrockandlining,carriedoutastudyonsimilarmodeltesttoin-servicekarsthighwaytunnelwiththegeometricsimilarityratioof1/40.Then,thedistributionlawandtrendofsurroundingrockpressurewererevealed.Subsequently,themechanicalbehaviorsofthesurroundingrockwerediscussedafterendowingsometreatmenttothesecaves.Theresultsshowthat:?the?surroundingrockfromBaishanTunnelcanbeproperlysimulatedbythemixtureofbaritepowder,plasterpowderandcementwiththeproportionof1:12:2;?applyingthelowerelasticmodulusmaterial,comparedtosurroundingrock,tofillthosekarstcaves,whichwillleadtogreatercompressiondeformationunderthesameload;?whenthesecaveswerelaidnearbythespandrel,haunchandspringing,karstcaveswillcauseunsymmetricalpressuretotunnellining.Although,thosecaveshavebeenfilled,whichshouldbeattachedgreatimportanceduringthetunnelservice.

【 授权许可】

Unknown