4SichuanHydropower固增水电站首部枢纽设计变更分析与评价张巨会(中国水利水电第七工程局有限公司,四川彭山620860)摘要:大型水电站工程从初步设计阶段到施工设计阶段往往要经历几年时间,此时工程施工的外部条件可能会发生较大的变化。鉴于技施阶段与初设阶段设计精细化程度存在差异,因此,有必要通过更深入的设计、在满足规范及合同要求的前提下对初步设计报告进行适当的变更调整,以达到方便施工、节约投资、有利于风险控制的目的。固增水电站在设计施工图阶段对首部枢纽的布置进行了变更,主要变更内容包括:防渗布置、上游左岸导墙布置、进水口、泄洪、冲沙闸、护坦及海漫结构等,其变更调整遵循并响应了初步设计阶段和有关审批文件的规定,满足现行国家有关规程规范和招标文件的要求,布置合理,不影响建筑物结构运行安全。阐述了对固增水电站首部枢纽设计变更进行的分析与评价。在方便施工、节约投资、风险控制方面具有重要意义。关键词:固增水电站;首部枢纽;设计变更;分析与评价中图分类号:TV7;TV22;TV51文献标志码:B文章编号:1001-2184(2023)05-0004-05AnalysisandEvaluationonDesignChangeofHeadworksofGuzengHydropowerStationZHANGJuhui(SinohydroBureau7Co.,Ltd.,PengshanSichuan620860)Abstract:Itoftentakesseveralyearsfromthepreliminarydesignstagetotheconstructiondesignstageofalarge-scalehydropowerproject,atwhichtimetheexternalconditionsoftheprojectconstructionmaychangeconsiderably.Sincethereisadifferenceindesignrefinementbetweenthetechnicalconstructionandtheprelim-inarydesignstage,itisnecessarytomakeappropriatechangesandadjustmentstothepreliminarydesignthroughmorein-depthdesignonthepremiseofmeetingtherequirementsofthespecificationsandcontractstoachieveconvenientconstruction,tosaveinvestmentandtocontrolrisks.Duringthedesignandconstructionstage,thelayoutoftheheadworkshasbeenchanged.Themainchangesinclude:anti-seepagelayout,upstreamleftbankguidewalllayout,waterinlet,flooddischarge,sandsluice,apronandapronextensionstructure,etc.Thesedesignchangesandadjustmentsfollowandrespondtotherequirementsofthepreliminarydesignstageandtherelevantapprovaldocuments,andmeettherequirementsofthecurrentnationalrelevantregulationsandtenderdocuments.Theadjustedlayoutisreasonab...
