学科分类
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2 个结果
  • 简介:LiKeqiang,PremieroftheStateCouncilofChina,chairedanexecutivemeetingoftheStateCouncilinBeijingonNovember19,2014,toarrangepromottionofchilddevelopmentinpoorareassoastomakechildreninfamilieswithdifficultieshaveabrightfuture.Themeetingemphasizedthatchildrenwerethehope

  • 标签: 儿童 家庭 国务院总理 贫困地区
  • 简介:Longpilesoftheoceanoilplatformareusuallymanufacturedastheintegrationofseveralsegments,whichhavetobeassembledonebyoneduringinstallation.Duringpiledriving,excessiveporepressurewillbuildupinsuchahighlevelthathydraulicfracturinginthesoilroundthepilemaytakeplace,whichwillcausethesoiltoconsolidatemuchfasterduringpileextensionperiod.Consequently,afterpileextension,thesoilstrengthwillrecovertosomeextentandthedrivingresistancewillincreaseconsiderably,whichmakesrestartingdrivingthepileverydifficultandevencausesrefusal.Afiniteelement(FE)analysisprocedureispresentedforjudgingtheriskofrefusalbyestimatingtheblowcountsafterpileextension,inwhichtheregainofsoilstrengthisconsidered.AcaseanalysisinBohaiGulfisperformedusingtheproposedproceduretoexplainthepilerefusalphenomenon.

  • 标签: 超长桩 渤海湾 驾驶 海洋石油平台 水力压裂 土壤强度