欢迎来到天天文库
浏览记录
ID:33217218
大小:21.52 MB
页数:71页
时间:2019-02-22
《国道g213线彻底关沟泥石流发育特征与防治措施-研究》由会员上传分享,免费在线阅读,更多相关内容在行业资料-天天文库。
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
此文档下载收益归作者所有