膨胀土中的隧道设计与施工Design and Construction of Tunnel in Swelling Soil

《膨胀土中的隧道设计与施工Design and Construction of Tunnel in Swelling Soil》由会员上传分享，免费在线阅读，更多相关内容在学术论文-天天文库。

1、WorkshopUPC:TunnellingthroughSalineandSwellingGroundTunnelDesignandConstructionPractice:TechnicalSolutionsinSwellingGroundThomasMarcher,20.01.2011TunnelDesignandConstructionPractice:TechnicalSolutionsinSwellingGroundMotivationsubjectofthepresentation:toidentifyeffec

2、tsoftime-dependentdeformationsduetoswellingbasedondesignandconstructionexperiencesoflargeinfrastructureprojects:•BosruckRoadTunnel,Austria:5.5kmlongbasetunnel-anhydriteswellingNATMwithstiffliningconcept•PfänderRoadTunnel,Austria:6.6kmroadtunnel–argillaceousclayshalesw

3、ellingTBMwithsegmental/CIPliningconcept•NiagaraTunnel,Canada10.4kmwaterdiversiontunnelinclayshalesswellingdesignforlifetimeofstructurepage21TunnelDesignandConstructionPractice:TechnicalSolutionsinSwellingGroundIntroductionTerminology•time-dependentdeformationdescribe

4、das“rocksqueeze”and“swelling”however,processesareofteninterrelated,individualeffectsofeacharedifficulttodistinguish.•presentationfocuseson“swellingofrock”timedependentvolumeincreaseduetoaphysico-(and/or)chemicalreactionoftherockwithwateroftherockwithwater.•swellingm

5、echanismsdistinguishedin:swellingofargillaceousclayshales/marlsswellingofanhydriticrockformations.page3TunnelDesignandConstructionPractice:TechnicalSolutionsinSwellingGroundIntroductionSignificanceofSwellingfortunnelconstruction•successofdesignandconstructionofatun

6、nelrelatedto:theknowledgeofgeologicalenvironment,rockmassparameters,overburdenthickness,in-situstressfield,tunnelsizeandshape,etc.•long-termdeformationoftengovernsthefinalliningdesign.•geotechnicalbaselinereportsoftenproposeunrealistichighswellingpressures:duetosimp

7、lyfalsetestresultsmisunderstandingsofswellingprocessesoverestimationsareeasilydecisiveas“go/no-gocriteria”canbeasignificantfactorfortheeconomicefficiencypage42TunnelDesignandConstructionPractice:TechnicalSolutionsinSwellingGroundIntroductionSignificanceofSwellingfor

8、tunnelconstruction•Swellinggyyisnotonlyaffectedbyggroundconditionssuchasrockmassproperties,in-situstressfield,supplyofwater•