深厚覆盖层上土石围堰渗流及边坡稳定性研究(5)

发布时间:2021-06-05

乌东德水电站上游土石围堰填筑于60m厚的覆盖层上,堰体及基坑开挖后形成了高达150m的复合边坡。针对围堰采用的塑性混凝土防渗墙上接复合土工膜的防渗型式,采用有限单元法对其正常运行条件和局部破损情况下的渗流场进行了计算分析,并采用非线性强度参数对各运行条件下的上下游边坡稳定性进行了复核。研究表明,采用塑性混凝土防渗墙上接复合土工膜的防渗方案是合理的,其防渗效果显著;围堰断面的安全性可以得到保障。

 第9期   黄春华,等:南水北调东线江都泵站Y形导流墩改造方案研究

61

表2 运行噪声、振动测量值

改造前

项目

改造后

3 结语

南水北调东线江都泵站改造工程在站下引河采用“Y”形导流墩加低底坎的组合方案,改善了抽水站在不同工况下的进水流态,减缓了泵站进水口泥沙淤积,有效地减小了机组运行噪声,提高了泵站机组运行效率,应用效果良好。参考文献:

[1] 卢金友,徐海涛,姚仕明.天然河道水流紊动特性分析[J].水利学

报,2005,(9).

[2] 陈稚聪,黑鹏飞,丁翔.丁坝回流区水流紊动强度试验[J].清华大

2008,(12).学学报:自然科学版,

[3] 丛国辉,王福军.湍流模型在泵站进水池漩涡模拟中的适用性研

究[J].农业工程学报,2008,(6).

[4] 董建源,潘志军.杭州三堡排涝泵站噪声控制方案研究[J].浙江

水利水电专科学校学报,2011,(6).

(编辑:徐诗银)

噪声/径向轴向噪声/径向轴向

db振动/mm振动/mmdb振动/mm振动/mm

0.0110.0320.0120.0290.0070.0270.0100.0230.0100.0260.0100.0350.0090.036

0.0170.0120.0200.0110.0230.0120.0190.0100.0170.0100.0210.0090.0220.021

90.997.791.097.791.197.691.897.691.897.691.097.590.396.6

0.0090.0270.0090.0270.0060.0290.0090.0240.0090.0240.0080.0330.0110.018

0.0140.0100.0200.0090.0190.0090.0150.0080.0150.0080.0130.0090.0180.012

00.11号机组电机1

水泵

2号机组电机

水泵

3号机组电机

水泵

4号机组电机

水泵

5号机组电机

水泵

6号机组电机

水泵水泵

98.595.998.693.097.994.197.296.998.199.998.599.8

7号机组电机103.3

ReviewofrebuildingschemeofY-typediversionpierof

o-NorthWaterDiversionJiangduPumpingStationinEasternRouteProjectofSouth-t

HUANGChunhua,KUANGZheng

(JiangduPumpStationofJiangsuProvince,Yangzhou225200,China)

Abstract: DuetotheoriginaldesigncauseofJiangduPumpingstation,theflowdirectionoftheinletwasperpendiculartotheaxisofthemainchannel,causingpoorflowpatternandserioussedimentation.Asaresult,theoperationefficiencyofpumpunits,andlargervibrationandhighernoiseofunitsoccurred,causingtheirunsafeandinstableoperation.Inordertoimwasaffectedprovetheflowpatternatinletandreducethesedimentdeposition,onthebasisofyears'operationexperiencesandin-situobser,therebuildingschemeofaddingY-typediversionpierwithsillisputforward.Thein-situobservationdataafterimplevationmentationoftherebuildingschemeshowsthattheflowpatternattheinletisimprovedandthesedimentdepositionismitigated;theoperationefficiencyoftheunitsareraisedandthevibrationandnoisearereduced.Theintendedpurposeisachievedbytherebuildingscheme.

Keywords: Y-typediversionpier;sill;rebuildingscheme;JiangduPumpingStation

櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅櫅

(上接第58页)

Studyonseepageandslopestabilityofearth-rockcofferdamondeepoverburdenfoundation

LUXiaochun,TIANBin,SUNKaichang

(CollegeofHydraulicandEnvironmentalEngineering,ThreeGorgesUniversity,Yichang443002,China)

Abstract: TheupstreamcofferdamofWudongdeHydroelectricStationisbuiltonfoundationwith60moverburdenlayer,thusa150mhighartificialslopeconsistedofcofferdamslopeandfoundationpitisformed.Theseepagecontrolsystemofcofferdamisconstitutedbyplasticconcretecutoffwallandcompositegeomembrane.Theseepagefiledundernormaloperatingconditionandpartialbreakageconditionisanalyzedbyfiniteelementmethod,andtheslopestabilityundervariouscasesisreviewedbynonlinearstrengthparameters.Theresultsshowthattheseepagepreventionsolutionformedbyplasticconcretecutoffwallandcompositegeomembraneisreasonable,theseepagepreventioneffectisobvious;andthestabilityofcofferdamundervariouscasesmeets,thesafetyofcofferdamisguaranteed.therequirements

Keywords: earth-rockcofferdam;deepoverburden;seepage;slopestability;WudongdeHydropowerStation

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