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对位于不均匀地基的某核电厂地下排水箱涵的地震反应进行了数值研究,着重探讨了箱涵伸缩缝的位移反应特性。采用场地相关地震动时程,考虑土体为理想弹塑性材料,基于FLAC~(3D)软件进行了非线性动力分析。结果表明,在地震作用过程中,埋地箱涵的位移取决于周围岩土体的运动;各管段的整体位移虽较大但各伸缩缝的相对位移数值较小;相邻箱涵段轴向不会发生碰撞;选择及设置伸缩缝止水带时应注意其横向最大变形应大于最大横向地震位移,以免发生剪切破坏。
The seismic response of the underground drainage culvert at a nuclear power plant located in an uneven foundation is studied numerically. The displacement response of the expansion joint of box culvert is emphatically discussed. Based on the time history of ground motion and considering the soil as the ideal elastic-plastic material, nonlinear dynamic analysis is carried out based on FLAC 3D software. The results show that the displacement of buried box culvert depends on the movement of surrounding rock and soil during the earthquake process. The overall displacement of each pipe section is relatively large but the relative displacement of each expansion joint is small. Will not collide; select and set the expansion joint waterstop should pay attention to its horizontal maximum deformation should be greater than the maximum lateral seismic displacement, in order to avoid shear damage.