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1、西南交通大學(xué)碩士研究生學(xué)位論文第1頁(yè)摘要\、適J
2、藏公路前龍段l?;挛挥诙缮剿淼罇|引道的咽喉路段,對(duì)川藏公路的暢通具有極其重要的影響,其形成條件、產(chǎn)生原因、變形破壞機(jī)制、幾何溫濕多雨氣候和坡體的泥質(zhì)巖性等;而滑坡發(fā)生的誘發(fā)因素是暴雨和工程活動(dòng)。模型試驗(yàn)和數(shù)值計(jì)算也證實(shí)了暴雨的誘發(fā)作用。對(duì)滑坡進(jìn)行了穩(wěn)定性分析,前級(jí)滑坡已處于失穩(wěn)狀態(tài),后級(jí)滑坡因受牽動(dòng)而穩(wěn)定狀態(tài)有所下降。穩(wěn)定性計(jì)算、模型試驗(yàn)以及數(shù)值分析表明前級(jí)滑坡的淺層滑體最不穩(wěn)定,同時(shí)其穩(wěn)定性對(duì)中層滑體也具較大影響。在此基礎(chǔ)上,對(duì)由多種治理工程措旌組成的工程結(jié)構(gòu)組
3、合的適應(yīng)性進(jìn)行了分析,以模型試驗(yàn)和數(shù)值計(jì)算驗(yàn)證了主體抗滑工程的良好整治效果。滑坡推力計(jì)算中,為解決分界面上垂直分力大于容許抗剪力的矛盾,提出了采用分塊極限平衡法進(jìn)行修正的方法。樁前滑面也考慮了安全系數(shù),并用傳遞系數(shù)法的試算方式計(jì)算樁前滑體抗力。在樁與錨索變形協(xié)調(diào)的假定下進(jìn)行了公式推導(dǎo)和程序設(shè)計(jì),以此程序計(jì)算了本滑坡整治工程的預(yù)應(yīng)力錨索抗滑樁的結(jié)構(gòu)變形和內(nèi)力,得出了錨索拉力的合理值,為試驗(yàn)結(jié)果所驗(yàn)證。關(guān)鍵詞:川藏公路;滑坡:滑動(dòng)機(jī)制;工程整治;錨索樁;模型試驗(yàn)數(shù)值模擬西南交通大學(xué)碩士研究生學(xué)位論文第1I頁(yè)Abstrac
4、tTheno.1slidelocatesintheQian-LongsectionofChuall-ZhangRoad.whichdecidestheopeningtotrafficofErlangshanTunnelandinfluencesthepassageoftheChuan-ZhangRoad.Ithasacomplextextureofmultilayerandmultigrade.Itisatypicalslidebecameofitscomplexformingenvironmentandmoving
5、process.Ontheinvestigationofitsgeologicenvironmentanddeformationcharacter,theauthordifferentiatestheslidetotwogradesandtwoparts,andexpatiatesitsmechanismofformationandmovement.Afterthestabilityanalysis,theauthordrawstheconclusionthatthefore-slideiSintheConditio
6、nofun-stabilityandthehind.slideiSintheconditionofdeclinedstabilitybecauseofthedraggingdownoffore-slide.Throughstabilitycalculatingandexperimentandnumericalsimulation,thispaperstudiesthestabilityofthedeferentlayersinthefore-slideanddiscoversⅡlatthesurfacelayerha
7、samostun.stabilityandinfluencesthestabilityofmiddle-layer.Tocontrolthislandslide,synthesismeansmustbeused,thispaperhasdiscussedtheaptnessoftheprojectcombination.Throughexperimentandnumericalsimulation,theprojectcombinationhasaverygoodeffectoncontrollingthe18lan
8、dslide.Atthecalculatingoflandslide.thrustbytransmit-coefficientslicemethod,whentheproblemthattheverticalcomponentforceishigherthantheadmissibleanti.shearforceintheslicedivisionplanehashappened,thispaperUSeSthedividing.blocklimit-balancedmethodtosolveit.rnlefore
9、-pileresistanceofsoilhasbeencalculatedusinganewstyleoftransmit-coefficientslicemethod.Thestrainandinternalforceofaprestressedanchorcable-pilearecalculatedwhenthedeformationb