专业英语presentation-the-leaning-tower-of-pisa(比萨斜塔)ppt课件.ppt

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1、TheLeaningTowerofPisaOutlineIntroductionHistoryofPisaRescueofTheTowerSpecificMeasureReasonofLeaningOtherleaningtowersIntroductionBuiltin1173OneofthethreelargestconstructionThesymbolofPisaWorldHeritageHistoryofPisaIn1173…..1178…1231…1360…2ooyears!ReasonofLeani

2、ngIn14thcenturyIn20thcenturyThereasonofleaningThereasonofrapidlytiltRescueofTheTowerSubgrade-stressrelieving※WhatisSubgrade-stressrelieving?※Whatistheconcretemeasure?WhatisSubgrade-stressRelievingMakeuseofgravity.Setuplargedeepdrillingrowsalongtheedgethebasal

3、outline,onthelessobliqueside.Takeoutweakbasesoilthroughtherowsinproperpositions.Keeptheoppositesidefromdisturbance.SpecificMeasureStrengthenthelowesttwolayerswithprestressedreinforcement.Placeleadpoundsonthelessobliqueside.Installtwosteelcablesaroundthemiddle

4、ofthetower.Takeoutsoilthroughtherows.OtherLeaningTowersPisaofChinaHuqiuTower(CHN)World'smostinclinedtowerSuurhusenLeaningTower(GER)HuqiuTower(CHN)SuurhusenTower(GER)