錦屏二級(jí)水電站引水隧洞圍巖卸荷力學(xué)特性試驗(yàn)研究與應(yīng)用.pdf

1、河海大學(xué)碩士學(xué)位論文錦屏二級(jí)水電站引水隧洞圍巖卸荷力學(xué)特性試驗(yàn)研究與應(yīng)用姓名：王戰(zhàn)鵬申請(qǐng)學(xué)位級(jí)別：碩士專業(yè)：巖土工程指導(dǎo)教師：朱珍德20060301ABSTRACTInrockengineering，rockandtunnelexcavationisunderunloadingcondition，thisisabsolutelycontrarytotherockmechanicsanalysiswhichalwaysuseloading

2、conditionparametersandaccordingcalculationmethodsEvenconsidering1inearunloadingduringtheexcavationsimulation，itisalsoconductedbynormalmethodanditsconstitutiveequationandparameterscalculationsoftwareiSinfactconsideredasle

3、adingconditionInfact，excavationisaprocessofunloading，notonlytheloadisunloading，butalsostresscondition，parainetersandconstitutiverelationarealsounderunloadingconditionCurrentlytheexcavationanalysisresultsdonotfittoin—situ

4、measure，sometimesthedifferenceistentimes，thisismainlybecausetheanalysisparametersandmodeldonotfittotheactualloadingconditionthisthesismainlydiscussmarblesurroundingrockoftheJinpinghydraulicpowerplant，andsomeconclusionsar

5、esummarizedasthefollowing：(1)Aimatthegreatdifferencebetweenthein—situmeasureandnormalloadinganalysisresult，indoorunloadingexperimentarecarriedoutusingmarblesurroundingrockoftheJinpinghydraulicpowerplant，andthemechanicalc

6、haractersduringunloadingareanalyzedMicrostructuremethodareusedtoanalyzethemarblesurroundingrockoftheJinpinghydraulicpowerplantUndertheconditionofprinciplestresskeptunchanged，thefailuresectionofspecimensarescannedbySEM，st

7、atthemicrostructureusingcomputerthechanginglawsunderunloadingarediscussed(2)Byassumingthedamageofrockinfinitesimalisfittostatistical1aw，adamagevariableisdefined，andaconstitutiveequationconsideringtheinfluenceofunlodingis

8、deducedBydatafitting，theparametersunderdifferentunloadingfailureareobtained，andithasbeenverifiedthatthemodelcurvecanfittotheexperimentalcurvewell(3)AFEMequationisdeducefromthestatisticaldamageconstitutivemodel，acalculati

9、onisconductedtotheJinpingwaterguidingtunnelexcavationusingthetheprogramaccordingtotheconstitutivemodel，andFEMresultwhichdonotconsideringunloadingiscomparedtotheaboveresultKeyword：Marble，unloadingexperiments，damageconstit