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ID:36569673
大小:2.66 MB
页数:87页
时间:2019-05-12
《大渡河瀑布沟水电站坝址左岸深启低沟泥石流发育特征及防治研究》由会员上传分享,免费在线阅读,更多相关内容在学术论文-天天文库。
1、西南交通大学研究生学位论文二}溺四瀑布沟水电站坝址左岸深启低年姓级二Oo四级名吴丽君申请学位级别工兰翌主专业地厦兰堡指导教师印塑兰兰兰二00六年十一月西南交通大学硕士研究生学位论文第1I页AbstractThePubugouhydropowerstationunderconstructionlocatedonthemiddleofDadufivevontheborderofHanyuanCountyandGanluoCountyinthewestpartofSichuanprovinceisthefifthpowerstationin
2、China。DebrisflowisontheleftsideofthePubugouhydropowerstation.Oncethedebrisflowbreaksout,thespillwayandwaysaroundandSOonwillbedestroyed,evendirectlyinfluencedhydropowerstation’sconstruction.Inthefulltext,authorresearchedthenaturecharacteristicanddynamiccharacteristic,and
3、analyzedvariousfactorscausingflowsdebris.Accordingtothechamctersofflowdebris,calculateddifferentdataincludingvelocityofflOW,flux,wallopandSOon.Atlast,confirmedthatShenqididebrisflowisviscositydebrisflow.Becausespillwayandrevisinghighwayaredesignedinlightofhundredyears,t
4、heresearchpredicatedscopescorrespondingwithlongevity.Thedebrisflowbelongstome.urnscale.BasmgontheecumenicaldestructionofviscositydebrisflOW,andcombiningrelationofdebrisflow,spillway,revisinghighway’thesubjectinthepaperspredictedhappeningscope,alluvialareaanddestructiont
5、ohydropowerstation.Moreover,sideslopeunderdamhasdirectinfluencebecauseofspillway.Thispaperanalyzedhappeningmechanismofdebrisflow.Thenputforwardpreventioncountermeasureaccordingtodifferentdestructionways,irrationalsocialandeconomichumanaction.Comparingdifferentthreepreve
6、ntionprojects,atlastwedesignedgrilie-damandbarrel—drainforthedebrisflows.Furthermore,thethesisadoptbiologicalmeasuresintheinterestofoptimumeffect.Throughaboveanalyses,thispapercontributedtolaterresearchanddesignwork.Keywordflowdebris;Preventionsystem;velocityofflow;flux
7、西南交通大学硕士研究生学位论文第1页1.1泥石流概述第1章绪论泥石流是一种突发性的自然灾变过程和现象,是介于滑坡、崩塌等块体运动和携沙水流运动之间的一系列连续流动现象【11。具有暴发突然,来势凶猛,破坏力大,危及面广,影响深远等特点。泥石流所经之处,冲毁公路、铁路、桥梁、水利设施等,堵塞河道,引发水患。进入20世纪以来,由于生态环境日益遭到破坏和人类不合理的经济活动,泥石流暴发率急剧增加。不仅给人民生命和财产造成巨大损失,而且严重恶化地区生态环境。我国幅员辽阔,地形条件复杂,山地,高原和丘陵约占国土面积的69%,又多处于季风气候区,降
8、水集中,使得泥石流在我国活动频繁,而且具有常发性、突发性、群发性、同发性等特点。从分布范围上看,泥石流分布遍及全国23个省、市和自治区,约950个县市,成片集中在青藏高原东南缘山地、四川盆地、陇东一陕南、晋西、冀北以及黄
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