向家坝水电站蓄水对大峡谷温泉的影响①

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therplace.Sotheinfluencewasanalyzedandallaintfrom multi-bininggeologicalanalysisandРnumericalanalysis.Theresultindicates:theinfluencethatwaterofreservoirtospringwaterisverylittlebecauseРwaterofreservoirwillnotenterhotspringaquiferthrough“scuttle”(Dayandong-Xiahebaarea、Wanwantanfault、РLoudongfault)largelyafterimpoundmentofXiangjiabahydropowerstation.Theσ1 incrementabout0.47~0.6РMPaandtheincrementofhorizontaldisplacementabout6~13mm,andtheinfluencedepthabout80m inrockРmassnearbyhotspringwellwhenwaterlevelis380mandsedimentationaltitudeis320m.Atthesametime,theРplasticfailurezoneislittleinrockmassnearbyhotspringwellafterimpoundmentofXiangjiabahydropowerstation.РecanberelocatedonРount.Р Key words: Xiangjiaba hydropower station; Great Gorge hot spring; 3D seepage calculation;РnumericalanalysisР 62

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