抗震Ⅰ类地下廊道级配碎石地基抗震适应性分析OA

Because nuclear waste liquid transport and discharge galleries are classified as seismic cat-egory Ⅰ items,seismic adaptability analysis is required when graded crushed stone is used for soft soil foundation treatment of these galleries.Considering the foundation treatment of a waste liquid dis-charge gallery at a domestic nuclear power plant as the background,a viscous artificial boundary con-sidering near-field heterogeneity is adopted to dissipate scattered wave energy and achieve seismic motion input.An equivalent linear method is employed to simulate the nonlinear dynamic characteris-tics of graded crushed stone material,and Goodman elements are introduced to account for the contact effect between the soil and gallery structure,thereby establishing a dynamic interaction analysis model for the underground gallery and graded crushed stone foundation.On this basis,seismic adaptability analysis of the underground gallery foundation is performed,and various indicators,such as structural acceleration response spectrum,internal forces,inter-story drift ratio,and relative deformation of joints,are comprehensively evaluated.The results indicate that the graded crushed stone foundation exhibits good seismic reliability and engineering practicality.The findings of this study can provide a technical reference for the engineering design of seismic category Ⅰ underground galleries.