高地應(yīng)力大斷面交叉隧洞穩(wěn)定性分析.pdf

1、西南交通大學(xué)碩士學(xué)位論文高地應(yīng)力大斷面交叉隧洞穩(wěn)定性分析姓名：李強申請學(xué)位級別：碩士專業(yè)：巖土工程指導(dǎo)教師：肖清華201205西南交通大學(xué)碩士研究生學(xué)位論文第1I頁AbstractWiththedevelopingtideofChina’Sconstructing，ithavebuiltaincreasingnumberoftunnelsandundergroundchambersthatmanyofthemhavetocarriedo

2、utwhiletherockisoflargeembeddeddepthandofhighin—situstressForinstance1argehydropoweroftenconstructedinprojectareaofpoororbadmountainconditionthatcombinedeffectsofgravitystressandtectonicstressfrequentlyaffectstabilityofu

3、ndergroundchambersrockaroundandstructmalsafetyEspeciallyasaresultofrequirementofundergroundchambersflaming，itbuiltmanyintersectiontunnelsthatwillfartheraffectconstructionsafetythatproducenocommontunnelshape，reducesurroun

4、dingrockstrengthandsignificantlyweakenmechanicalparametersofrockaroundTherefore，moreindepthresearchmustbetakenonsurroundingrockdeformationlawstressredistributionandstabilityofsurroundingrockthatprovidereliablebasisforrea

5、sonableoptimizationconstructionprogram，supportingstructureandparameter’ThisthesisdependontheresearchprojectofNewConstructionTechnologyofJinpingHydropowerStationDiversionTunnelwithDeepCoverand硒chWaterbackgroundtypicalinte

6、rsectiontunnelNode4群ofJinpingHydropowerStationanddiscussthefollowingissuesafterresearchprobablypuzzleofundergroundchamberswithhighinsitustress：1WithEngineeringpracticeofJinpingHydropowerStationanalyzedandevaluatedgeologi

7、calconditionsofJinping，Geometricshapeandsizeoftunnelsectionlayoutandfeatureofintersectiontunnel，constructionconditionsandearthquakesituationAndthenspecificanalyzedaseriesofquestionsofinstabilityandlandslidesofintersectio

8、ntunnelrockaround，foundationasdeterminefollowupcontrolmeasures2ExcavationworkorderandsupportingstructureWasresearchedthatprincipalfocusonthetimberingparametersofNode4撐whichwithfiequentlygeologicaldisasterandreasonablepro

9、jectofblastandtimberingWaspresent3ThewholeprocessofsimulationwastakentoexcavationoftypicalintersectionNode斜ofhighin—situstressofJinpingHydropowerStationandworkedoutthefeatureandlawsofthedeformationandstressofeachtunnelsa

10、ndparts，inparticulartheweakestsurroundingrockofacuteanglepositionAccordingtothis，optimizedtheconstructionprogramandsupportingstructure4Surroundingrockmonitoringresultsshowthatstressmeasuredvaluesofitchangeinasmallrangedu