PLAXIS在乏燃料干式贮存设施厂房建设过程数值模拟中的应用

Application of PLAXIS in Numerical Simulation of Spent Fuel Dry Storage Plant Construction Process

本文采用土工有限元程序PLAXIS,对乏燃料干式贮存设施厂房的建设全过程进行了数值模拟。一般的研究只针对基坑开挖过程进行,而本文以施工全过程作为模拟对象,得到了不同施工阶段的土体沉降和混凝土底板的变形。计算结果表明,整个施工过程中土体回弹和沉降值均在允许范围以内;底板的变形值较小,分布较均匀,未出现不均匀沉降。分析计算科学合理,具有一定的实用性,可以为厂址选择、地基处理、厂房布置及工程加固等工作提供重要的理论依据。

In this paper,the whole construction process of spent fuel dry storage facility workshop is simulated by using the geotechnical finite element program PLAXIS.Generally speaking,the research only focuses on the excavation process of foundation pit.In this paper,the whole construction process is taken as the simulation object,and the settlement of soil and the deformation of concrete floor in different construction stages are obtained.The calculation results show that the rebound and settlement values of the soil are within the allowable range during the whole construction process,and the deformation values of the floor are small and uniformly distributed,and there is no uneven settlement.The analysis and calculation are scientific and reasonable,and have certain practicability.It can provide important theoretical basis for site selection,foundation treatment,plant layout and engineering reinforcement.