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土木工程专业毕业论文中英文资料外文翻译文献土石坝

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illpromoteself-ur.Stageconstruction:Itisoftenpossibleandinsomecasesnecessary,toconstructthedamembankmentinstages.Factorsdictatingsuchaprocedureare:①awidevalleypermittingtheconstructionofthediversionoroutletworksandpartoftheembankmentatthesametime;②aweakfoundationrequiringthattheembankmentnotbebuilttoorapidlytopreventoverstressingthefoundationsoils;③awetborrowareawhichrequiresaslowcasesitmayconstructiontopermitanincreaseinshearstrengththroughconsolidationofthefill.Insomecasesitmaybenecessarytoprovideadditionaldrainageofthefoundationorfillbymeansofsanddrainwellsorbymeansofhorizontalperviousdrainageblankets.Embankmentsoils:Mostsoilsaresuitableforuseforembankmentconstruction,however,therearephysicalandchemicallimitations,soilswhichcontainexcessivesaltsorothersolublematerialsshouldnotbeused.ont

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