某水电站大孔口深孔弧形闸门设计探讨.docx

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水利水电技术第44卷2013年第8期

某水电站大孔口深孔弧形闸门设计探讨

王兴恩，陆一婷，杨清华

(中国水电顾问集团贵阳勘测设计研究院，贵州贵阳550081)

摘要：某水电站地处寒冷地区，由高坝大库组成，在预可研前期泄水系统作了放空洞参与施工度汛的方案。该方案设置的中层放空洞弧门孔口尺寸大、挡水及运行水头高，设计难度大。因此，以传统的设计思路，不仅其门叶、支臂、支铰的制造、运输及安装难度大，而且其启闭设备的技术水平要求也很高，实现的难度大。加之，若其水封采用技术成熟、经济性较好的充压式止水型式在低温情况下存在管路冻住失效的风险，不利于弧门的安全运行。因而，本文针对以上问题对该大孔口深孔弧形闸门的结构、水封、门槽及启闭设备型式进行了分析比较，并提出相应的解决方案，可为后续类似弧形闸门的设计提供一些借鉴和参考。

关键词：弧形闸门；框架结构；支铰；轴承；水封；偏心铰；门槽；液压启闭机

中图分类号：TV663.2文献标识码：A文章编号：1000-0860(2013)08-0073-05

Discussionondesignoflargedeep-outletradialgateofahydropowerstation

WANGXingen,LUYiting,YANGQinghua

(HydrochinaGuiyangEngineeringCorporation,Guiyang550081,Guizhou,China)

Abstract:Ahydropowerstationissituatedinacoldregionandconsistsofhighdamandlargereservoir;forwhichthewaterdis-chargesystemistobetakenasanemptyingtunnelinthepriorperiodofthepre-feasibilitystudyfortheconstructionduringfloodseason.Inthisscheme,theopeningsizeoftheradialgateforthemediumemptyingtunnelislargewithhighheadforwaterretai-ningandoperation,andthenitsdesigndificultyisrareintheworld.Thus,notonlythemanufacture,transportationandinstalla-tionofitsleaf,arm,trunionarequitedifficult,butthetechnicalrequirementonitshoistingequipmentisalsohigherwithalargedifficultytoberealizedundertheconventionaldesignconcept.Furthermore,ifthetypeofpressure-flledwaterstopwithmaturetechniqueandbettertechnologyeconomyisadoptedforitswater-seal,theriskofitsfailurecausedbythefreezeofthepipelinewilloccurunderalowertemperaturecondition,whichisunfavorabletothesafeoperationofthegate.Therefore,thestructurewater-seal,gateslotandhoistingequipmentofthislargedeep-outletradialgateareanalyzedhereininaccordancewiththeprob-lemsmentionedabove.Moreover,thecorrespondingsolvingschemesconcernedareputforward,soastoprovidesomereferencesforthesuccessivesimilarra