南宁市位于珠江流域西江水系的最大支流郁江中!下游的岂江河段上,是 广西壮族自治区的首府,为1987年全国首批重点防洪城市2001年7月南宁市 发生了1937年以来的大洪水(约10年一遇),为此南宁市政府把城市防洪列 为重点基础工程南宁市防洪的重点是解决抵御外江洪水和城市排涝两个方面 的问题沙江堤作为南宁市防洪体系的一个不可或缺的部分,重点也在解决这 两个问题 文章主要从这两个方面进行了方案比较研究:一方面是防洪工程一一防洪 堤的堤线选择!堤型方案确定以及与防洪堤相联系的其他建筑物,如堤防上下 码头!防洪排涝闸!穿堤灌渠涵闸的建设等;一方面是排涝工程一一沙江泵站 的方案比选!泵房的设计等;并从环境影响以及经济的角度给出了一定的评价, 最后得出结论: 从工程建设的必要性角度看:南宁市江南区的城市规模和其所处的地位, 现有堤防的防洪力与之不相适应,为此尽快加高现有的市区沙江堤,使南宁江 南区有一个安全的生活!生产!建设!投资环境,是非常必要的,也是十分迫 切的沙江堤是河南堤的上游封闭端,江南片50年一遇洪水的防御由沙江堤 与河南东堤!河南支线堤!河南西堤共同承担其工程建设十分的必要 从方案比较结果看:1!防洪方案:旧堤线方案,由于规划时间较早,堤 线过于弯曲,没有充分考虑城市规划建设发展需要;堤路园结合的新堤线方案, 充分考虑到城市规划建设发展的需要,保护了西南地区出海大通道南宁市沙井铁路南站枢纽及工业!物流园区,增加保护面积5.84km,!人口3万人(规划), 土地增值约4.4亿元,满足了南宁市城市规划建设发展的要求,有着巨大的经 济效益!社会效益和环境效益因此,按新堤线方案建设的堤路园是保证南宁 市作为西南地区出海通道枢纽城市及东盟博览会永久会址城市的战略要求,也 是南宁市完善城市经济结构和产业布局,提升城市综合竞争力的必然要求 2!排涝方案,经过比较,由于方案一考虑拟建泵站抽排全流域洪水,投 资比方案二!方案三都小,管理集中,运行调度简单,不涉及上游水库的改造 及运行调度,具有单一性特点,最终推荐选择投资最省!淹没拆迁少!审批程 序简单的方案一:全流域抽排 从上述项目建设的必要性和工程设计的经济指标及项目的社会效益方面 着眼,沙江堤改建工程应尽快实施 关键词:防洪排涝防洪堤设计泵站设计环境影响评价 经济影响评价Thep1ande11berationofNanningflood一eontrolworkssandriver d1keseet1onf1oodPrevent1onanddra1nswaterloggedIand ABSTRACT Nann1ng,Guangx1ZhuangAutonomousReg1oneaP1tal,151oeatedon thedownr1verYongj1angseet1on,b1ggestbranehYuJiang,whieh15in thePear1RiverbasinWestRiversystem.Itbeeamethefirsnationa keyf1oodPrevent1oneityin1987.InJuly2001,Nanninghadthebiggest f1ood(about11n10years)51nee1937.50thegovernment1iststheeity f1oodPrevent1onasthekeyfoundat1onengineering.ThefloodPrevention keyPo1nt15to501vetwoasPeetsquest1ons:theres1staneeofoutr1ver ena.n丫.(YongJ1angr1ver)f1oodandthee1tywater1ogged1anddra1ns. ShaJ1angr1verd1ketooktheNann1ngf1oodprevent1onsvstemas 1nd1sPensab1ePart,1sa!50to501vethesetwoProb1emswithemPhasis. Th15art1e1ehasma1nl丫eonduetedthefeas1b11itvstudyfrom thesetwoasPeets:on d1ke11neeho1ee,the onehand15thef!ood一eontro1works一一f}ood一dam d1keP1andeterm1nedaswe11asotherbu11d1ngs wh1ehre1atesw1ththef1ood一dam,forexamPIe,theembankmentwharf, thef1oodPrevent1ondra1nswaterIoggedIandthefloodgate, 1rrigationditeheulvert,sluieetheeonstruetionandsoon.on d1ke other hand15thedra1nswaterIoggedIandtheprojeet-一thesandriverpumping stat1onP1anehooses,thePumPhousedes1gnand50on.Andth15artiele hasa150Prov1dedthestrietdiseussionandtheevideneefromtheenv1ronmenta1effeetaPPra1sa1aswe11astheeeonomieevaluationangle totheProjeetfeasibi1ity.Thusithasdrawntheeonelusion: Fromtheeng1neer1ngeonstruetionneeessaryanglethat,TheNanning Ch1angnanareaeitysealeanditsloeatesthestatus,theexisting ,elUJ--Uembankmentf1oodPreventionstrengthwithitdiseonformityshou ra1setheex1st1ngurband1str1etsandr1verd1keassoonasPossi forth15,enab1etheNann1ngCh1angnanareatohaveasafe11fe,the Produet1on,theeonstruet1on,the1nvestmentenv1ronment,15extremefy essent1al,a15015extremelyurgent.Thesandriverdike15theHenan d1keuPstreame1osedend,theCh1angnanP1eee50yearsassoonasmeets the West f1oodthedefensebyeastthesandr1verd1keandHenanthed1ke, theHenanbranehd1ke,Henanthed1keundertakestogether.lts eng1neer1ngeonstruet1onextreme1yneeessity. FromthePIaneomParisonresultthat,lst,floodPreventionPlan: The01dd1ke11neP1an,asaresuItofthePlantime,thedikelinetoo 15eomParat1ve1year1yeury1ng,doesnothavethefu11eons1derat1on urbanP1ann1ngeonstruet1ondeve1oPmentneed:thegardenun1onnewd1ke 1inePlan,fullyeonsideredurbanPlanningeonstruetiontheneedto deve1oP,Proteetedsouthwesttheareato90toseatheb19ehanne Nann1ngsandwe11ra11roadsouthstat1onkeyPos1t1onandthe1ndustry, theth1ngf1owsthegardenarea,i popu1at1on30,000people(p1an), nereaseProteet1onarea5.84km2,the the1androse1nva1ueaPProximately440m1111onYuan,hassat1sf1edtheNann1ngurbanP!ann1ngeonstruet1on deve1oPmentrequest,hasthehugeeeonom1eeff1e1eney,thesoe1al eff1e1eneyandtheenv1ronmentbenef1t.Therefore,aeeord1ngtothenew d1ke11neP1aneonstruet1onthegarden15guaranteedNann1ngsouthwest tooktheareagoestoseatheehanne1keypos1t1one1tyandthe Assoe1at1onofSoutheastAs1anNat1onsexPos1t1onPermanenteonferenee 51tee1tystrategierequest,also15Nanningeonsummatestheurban eeonomystruetureandthe1ndustr1al!ayout,Promotestheeitysynthesis eomPet1t1veab111tythe1nev1tab1yrequest. Znd,dra1nswater1ogged1andtheP1an,theproeesseomPar1son beeauseaP!aneons1derat1onP1anstoeonstruetthePumP1ngstat1onto Pu11outtherowofent1rebas1nf1ood,1nvestseomParedtotheP1an two,theP1anthreea115!1ghtIy,managestheeentra11sm,themovement d1spateher155imPleupstream,doesnotinvolvethereservoir transformat1onandthemovementd1sPateh,hastheun1tary eharaeter1stie,finallyreeommendstheehoieeinvestmentmosttosave thesubmergeneefewre1oeates,theexaminationandaPProvalProeedure 51mP1ep1anone:Theent1rebas1nPu115outtheP1atoon. FoeusesfromtheaboveProjeeteonstruet1onneeessityandthe eng1neer1ngdes1gneeonom1c1nd1eatorandtheprojectsoeialeffieienev asPeet,thesandr1verd1kerebu11dstheProjeettobesuPPosedto imPlementassoonasPossible.KEYWORDS:FloodPrevention Flooddaxndesign Waterloggedlanddrains Pu帅ingstationdesign Environmentaleffeet即Praisal Eeonomieevaluation目录 第一章工程背景1 1.1南宁市防洪现状说明#.,-,0.l 1.2!城市规划堤路园内容#2 1.3!河流规划成果3 第二章工程条件4 2.1!自然条件!水文!地质.-4 2.2!工程任务7 第三章方案的提出及研究#-0#000-.-.-08 3.1堤防工程方案的提出及研究#-,/./-.-0-00/.8 3.1.1方案的提出8 3.1.2方案的研究10 3.1.3新旧堤线方案优劣的比较10 3.2排涝工程方案的提出及研究24 3.2.1方案的提出24 3.2.2全流域抽排方案研究34 第四章结论及建议#46 4.1结论46 4.2建议47 附件:南宁市防洪工程沙江堤改建工程位置示意图