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H江碾压混凝土重力坝 设计说明书毕业论文.doc

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H江碾压混凝土重力坝 设计说明书毕业论文.doc

水利水电工程专业毕业设计I摘要本次设计的基本资料取于我国西南部地区的已建工程。首先进行坝型的选择,我们主要考虑地形、地质、水文、人文和气候条件。经过对几种可建造坝型的多方面比较,我们选择建造高碾压混凝土重力坝。它比实体重力坝所使用混凝土方量少,总体造价低。大坝安全也是大坝设计中最重要的控制因素,坝愈高安全愈重要。由于水库蓄水量很大,更需要有谨慎的设计,以防止因失事而招致重大的生命财产损失。小心处理诸多影响运行性能的因素,确保坝的安全、经济和效用。溢洪道是河川水利枢纽中必备泄水建筑物,用以排泄水库不能容纳的多余洪水量。碾压砼重力坝通常在坝顶设置溢洪道,入库设计洪水的选择和确定,必须在充分研究流域水文因素的基础上进行,然后才能确定溢洪道的尺寸。对于过坝水流的调泄,需要有合理慎重的设计,以避免生命财产的损失。我们是通过调洪演算来确定起调流量和下泄流量从而来设计坝顶溢洪道。在满足约束条件的前提下,根据大坝基本剖面最小原则确定该碾压混凝土大坝的剖面和轮廓尺寸,也包括坝身的一些细部构造以及对地基的处理等。在确定完上下游坡度后,用稳定计算和材料力学法从正常蓄水,设计洪水水位,校核洪水水位以及正常加地震四个工况下来验证和校核设计剖面的可行性。同样溢流坝段的分析同非溢流坝段。在完成坝体基本剖面的设计后,要通过材料力学的方法对坝体内的应力进行计算与分析,在保证坝体四个截面上的应力在正常蓄水和设计工况下都不出现拉应力,在地震和校核情况下的拉应力满足规范的要求。在设计第二主要建筑物时,设置压力钢管为水轮机供水。采用坝内埋管形式,钢管用箍筋和加劲环加固,设置伸缩节防止钢管因温度变化而拉长或收缩使应力增大。并且也对压力钢管进行了细部构造和配筋计算。碾压砼重力坝通常分期施工,而且对施工时时间的要求非常高,因为它的整个坝体有四部分,各种建坝材料的凝结时间和材料与材料之间的结合时间都要求很高,所以分期导流是大坝建造的关键一步,要尽可能的减少受到水文、地形、地质和施工计划的影响。通过本次设计我们掌握了碾压砼重力坝的设计流程,对于碾压砼重力坝的一些特点和设计时应该注意的方面进行了了解,完成了知识从理论学习到实际运用的过渡,体会到了身为一个水利设计者所需要具备的品质和担负的责任,这对我们以后的工作或是学习都是一次锻炼。关键词材料力学法碾压混凝土重力坝H江碾压混凝土重力坝IIAbstractThedamsiteselection,mainlydependsonthetopography,geology,hydrology,culturalandclimaticconditions.ThedesignofthebasicinformationfromthesouthwesternregionofChinahasbuildingworks.Aftertheconstructionofseveraldamstocompareestimatesofeconomy,wechoosetheconstructionofhighRCCgravitydam.Thanbytheuseofconcretegravitydamentitiestosmall,lowoverallcost.Rollercompactedconcretegravitydamisusuallysetupthetopofthedamspillway,thespillwayforriverwaterdischargestructureessentialhubfortheexcretionofexcessreservoircannotaccommodatethefloodvolume,mustbedesignedtodischargethelargestvolume,whileatthesametimetomaintainthereservoirthewaterlevelbelowtheexpectedlevel.Designoffloodstorageoptionsanddeterminedtobeinfullhydrologicalstudyconductedonthebasisoffactors,andthentodeterminethesizeofthespillway.Forthetransferofwater过坝China,thereisareasonableneedcarefuldesign,inordertoavoidthelossoflivesandproperty.Wearethroughthefloodtransferfromcalculustodeterminethedischargeflowoftrafficandthustodesignthetopofthedamspillway.Thenintheupstreamanddownstreamtomeetthestabilityandstressconditions,thesmallestprofileinaccordancewiththebasicprinciplesofthedamtodeterminetheprofileofrollercompactedconcretedamofthesizeandcontour,includingthedambodystructureaswellassomedetailthehandlingofthefoundation.Endindeterminingtheupperandlowerslope,theuseofstablecomputingandmechanicsofmaterialsfromthenormalwaterstorage,designfloodlevel,checkfloodlevel,aswellasthenormalincreaseintheearthquakefourconditionsdesignedtoverifyandcheckthefeasibilityofprofiles.Spillwaysectionofthesameanalysiswiththenonoverflowdamparagraph.Endinthedesignofthebasicprofileofthedam,themechanicsofmaterialsbythemethodofstressonthebodytocarryoutcalculationandanalysisofthefoursectionsinthedamtoensurethatthestressinthenormalstorageconditionsanddesignoftensilestressdidnotappear,inthecaseofearthquakeandcheckingthetensilestresstomeetthespecificationrequirements.Themainbuildingsinthedesignofthesecond,thesetpressureofthewatersupplypipefortheturbine.Pipeusedintheformofdam,steelringwithstrongreinforcementstirrupsprocessing,setuptopreventthepipejointsduetotemperaturechangeandlengthenorshrinksothatthestressincreases.Andalsothepressureofasteelreinforcedstructureandcalculatedindetail.Rollercompactedconcretegravitydamisusuallytheconstructionphases,butalsotherequirementsoftheconstructiontimeisveryhigh,becauseitisthewholedamhasfourparts,allkindsofmaterialstobuildthesettingtimeandmaterialsandmaterialscombinedwiththetimebetweentherequestishigh,sothephaseddiversionisakeystepintheconstructionofthedam,totheextentpossible,toreducethevulnerabilityofthehydrology,topography,geologyandconstructionprograms.Designofdamsafetyisalsoadamtocontrolthemostimportantfactors,thehigherthedamthemoreimportantsecurity.Reservoirstoragecapacityduetoalarge,butalsotheneedforcarefuldesigninordertopreventamajoraccidentresultinginlossoflivesandproperty.Carefulwithalotoffactorsthataffectperformancetoensurethatthedamssecurity,economyandeffectiveness.Weadoptedthedesignoftherollercompactedconcretegravitydammasteredthedesignmethod,butalsoknowtherollercompactedconcretegravitydamonanumberofimportantcharacteristicsand水利水电工程专业毕业设计IIIthedesignshouldpayattentiontowherethecompletionoftheknowledgelearnedfromthepracticalapplicationofthetheoryofthetransition,experienceddesignerswhoneedawaterconservancyprojectwithqualityandresponsibility,whichwelaterlearnisajobortraining.KeywordsthemechanicalmethodRollercompactedconcretegravitydam水利水电工程专业毕业设计1目录摘要.............................................................................................................................................................................1第一章综合说明....................................................................................................................................................1第一节枢纽布置.........................................................1一、发电.....................................................................................................................................................1二、防洪.....................................................................................................................................................1三、航运.....................................................................................................................................................1第二节设计要求.........................................................1第三节工程特性表.......................................................2第二章设计基本资料........................................................................................................................................4第一节自然地理.........................................................4一、流域概况.............................................................4二、气候特征....................................................................................................................................................4三、径流、洪水、泥沙....................................................................................................................................5第二节工程地质.........................................................81、地震烈度......................................................................................................................................................82、地形地貌......................................................................................................................................................93、地层岩性......................................................................................................................................................94、地质构造......................................................................................................................................................95、岩体物理力学性质......................................................................................................................................9第三节碾压混凝土层面和大坝建基面的抗剪强度指标........................10第四节各分区砼相应龄期的抗压强度指标..................................11第五节筑坝材料........................................................19第六节水库淹没处理及移民安置..........................................191、LT水库淹没影响实物指标.......................................................................................................................192、移民安置规划............................................................................................................................................19第七节施工组织........................................................191、施工条件....................................................................................................................................................192、对外交通....................................................................................................................................................203、材料供应....................................................................................................................................................20第三章枢纽整体布置和坝型选择..............................................................................................................20第一节工程等别与建筑物级别............................................20第二节枢纽布置........................................................21第三节坝型选择........................................................211、拱坝....................................................................................................................................................212、土石坝................................................................................................................................................213、面板堆石坝........................................................................................................................................214、重力坝................................................................................................................................................22第四节洪水调洪演算....................................................231、计算原理........................................................................................................................................232、计算结果........................................................................................................................................23第五节坝顶高程的确定..................................................24第四章非溢流坝段剖面设计.......................................................................................................................25第一节剖面尺寸拟定....................................................25第二节坝体强度和稳定承载能力极限状态验算及应力计算......................271、稳定的校核验算........................................................................................................................................27

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