国道g213线彻底关沟泥石流发育特征与防治措施-研究

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1、万方数据西南交通大学工程硕士学位论文第Ⅱ页AbstractDebrisflowwhichusuallybreakoutabruptly,isageologicalhazardwithahighdanger,BecauseofthemorefrequentoccurrenceofthedebrisflowAftertheW色nchuanearthquake．thiskindofgeologicalhazardwasbackinaactiveera．Itsformationconditionofthedebrisflowintheresearchareaissomehowdiffer

2、entfromthepre．earthquake’S．SOourresearchneedsmorethantheknowledgeondebrisflowbeforetheearthquake．Thereforeinvestigatethedebrisflowgullysinearthquakeareaandanalyzetheirdevelopingmechanismisofgreatimportanceontheresearchandhazardpreventionofthedebrisflow．ThedebrisflowinCheDiguangully—alargetypi

3、calgullyinWenchuanearthquakearea-whichlocatesinYinxing，village，Wenchuancounty,hasaseriesofcharacteristics：abigwatershed，asteepinclination，influencedbyearthquakeseverely,richsupplyofloosematerialandwaterresourceandendangersalot，etc．ThroughthefieldinvestigationofthedebrisflowinCheDiguangully,it

4、smainfeatureshavebeenrevealed：1．Adegreeofhighrisk．111eCheDiguanBridgeonthehighwayofG213，FutangTunnelunderconstructionalongtheDuwenfreeway,MinjiangRiverandtheHydropowerstationofTaiPingyiupstreamareallundergreatthreatofthedebrisflow．2．Asteepinclinationofthegully&Easyactivationoftheloosematerial

5、．ThebasinshapeoftheCheDiguangullyislikeatree】ear,whilethedispersioniS2381．5mwithainclinationof302％o．TheinclinationfromtheupwardoftheFeiShuiyangullyissteepwhilethedownwardisrelativelygentleoverall，whichhasacharacteristicofalterationfromsteep·to—gentleinspatial．negullyisrelativelystraightintwod

6、imensions，thewidthofthegullyisnarrowupstreamwhilewidedownstreamwithacharacteristicofalterationfromnarrow．to．wide．3．64pointsofloosematerialhavebeenstatisticsedbyfiledinvestigation．thereareslopeerosionprovenance，collapseprovenanceandaccumulationdepositsinthegully．Thestaticreservesofloosemateria

7、lare7．43x106m’andthedynamicreservesofloosematerialare1．95x100m’．Theloosematerialsincreasedsubstantiallyaftertheearthquake．andtheriskofdebrisflowalsoincreasedgreatly．4．AccordingtothegullyconditionsanddistrJibutionfeatureofsolidresourceofthedeb