中文摘要：

随着核电厂硬质基岩厂址资源的减少,风化岩、半成岩、沉积岩地基和滨海平原大面积第四系覆盖层内的隐伏浅层玄武岩地基也被论证作为核电厂核安全相关物项所需的稳定地基,其中柱状节理发育的玄武岩地基作为核电地基的适宜性鲜有研究。文章分析了美国汉佛德核废料处置场的柱状节理玄武岩的大型岩体原位试验成果、数值分析成果,采用三维离散元软件3DEC和Voronoi图形研究了不规则柱状节理玄武岩的岩体变形模量,计算表明：BWIP柱状节理玄武岩的数值试验计算值与原位试验成果相吻合,平行柱轴方向的变形模量数值解为20.19 GPa,原位试验值为20 GPa。文章给出了柱状节理玄武岩工程力学性质和地基适宜性的数值分析方法,可应用于核电厂和核废料处置场的选址中。

英文摘要：

As the hard bedrock sites decreases gradually, the nuclear safety related structures of NPP has been demonstrating the foundation suitability of the weathered rock, half-diagenesis rock, sedimentary rock and the shallow buried basaltic bedrock under the wide quaternary overburden layer of costal plain, but there are few recent research on basaltic foundation suitability which columnar joints well developed. In this investigation we analyzed the insitu colmunar basaltic rockmass test and numerical simulation results of Basalt Waste Isolation Project（ BWIP） in Hardford, then used the three-dimensional discrete element software 3DEC and Voronoi diagrams to calculate the deformation modulus of irregular colmunar basaltic rockmass. The results shown that the numerical simulation coincide better with the insitu rockmass test which the numerical solution of the deformation modulus parallel to the axial direction of BWIP is 20.19 GPa while the insitu rockmass test result is 20 GPa. This work provide some guidance for further numerical simulation on foundation suitability of colmunar basaltic rockmass which can be applicated into the sitting of NPP and disposal repository.