CPR1000核电站基础多层整体浇筑可行性有限元分析

FINITE ELEMENT ANALYSIS OF TEMPERATURE STRESS OF CPR1000 NUCLEAR POWER PLANT RAFT WITH DIFFERENT POUR THICKNESS

为了控制混凝土施工裂缝的产生,大体积混凝土通常采取分层分块的施工方法,CPR1000核电站基础也不例外。但是,分层分块法存在费工时、费造价等诸多不足之处,并且不合适的分层分块和施工养护措施可能导致施工裂缝更加严重。针对CPR1000核电技术,开展不同厚度基础多层整体浇筑的理论分析,运用有限单元法进行施工温度应力计算,揭示不同浇筑厚度对施工温度应力的影响规律,从理论角度证实CPR1000基础实施多层整体浇筑的可行性并为养护技术指标的确立提供理论依据,可为类似基础整体浇筑施工提供理论基础和实践参考。

For controlling construction crack, delamination or subregion will be adopted normally for mass concrete construction, with no exclusion of CPR1000 nuclear plant raft, but there arc many shortages of it, such as wasting time and money, which may cause more cracks as a result of improper delamination or subregion and maintaining methods. In order to acquire the temperature stress law of different pour thickness, the theoretic analysis of CPRIO00 nuclear plant raft with different pour thickness is carried out to verify the feasibility of multilayer cast concrete. All these can provide a theoretic basis and practice reference for similar rafts.