地下核反应堆洞室大型穹顶施工三维模拟研究

发布时间：2018-11-09 07:22

【摘要】：针对地下核电厂核反应堆洞室大型穹顶施工难度大的突出问题,分别提出了地下核反应堆洞室大型穹顶预留中心柱法和预留岩墙法两种施工方案,并利用Midas三维模拟平台,分别建立了上述两种方案分步施工三维分析模型。模拟结果表明,预留中心柱法和预留岩墙法分步施工引起的位移均满足施工安全要求,其中后者引起的最大位移较预留中心柱法施工引起的最大位移大,预留岩墙法分步施工引起的穹顶顶部位移较预留中心柱法明显,而预留中心柱法分步施工引起中心柱和开挖掌子面中部位移较预留岩墙法明显。两种施工方案应分别加强穹顶揭露区域、预留中心柱中部和开挖掌子面中部区域临时支护措施及监控措施,以确保施工安全。
[Abstract]:Aiming at the difficult problem of large dome construction of nuclear reactor cavern in underground nuclear power plant, two construction schemes, namely, reserved center column method and reserved rock wall method, are put forward respectively, and the three-dimensional simulation platform of Midas is used. The three-dimensional analysis models of the two schemes are established respectively. The simulation results show that the displacement caused by the reserved central column method and the reserved rock wall method meet the construction safety requirements, and the maximum displacement caused by the latter method is larger than that caused by the reserved central column method. The displacement of dome top caused by step construction of reserved rock wall method is more obvious than that of reserved center column method, and the displacement of center column and excavation face is more obvious than that of reserved rock wall method. The two construction schemes should strengthen the dome exposure area and reserve temporary supporting measures and monitoring measures for the central pillar and the central excavation face to ensure the safety of construction.
【作者单位】：长江勘测规划设计研究有限责任公司;
【基金】：中国工程院重点咨询项目“核电站反应堆及带放射性的辅助厂房置于地下的可行性研究”(2013-XZ-20)
【分类号】：TV554

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