【摘要】 将土体简化为Hardin-Drnevich等效线性模型,运用有效应力动力分析方法,得到SL1和SL2地震动作用下某核电导流堤的稳定安全系数、液化区分布以及震后残余变形。分别采用整个地震过程中的最小安全系数和最小平均安全系数评价了导流堤的稳定性,对计算结果进行了比对。SL1地震动作用下,导流堤地基砂土液化范围较小,不会影响导流堤结构的正常使用;SL2地震动作用下,导流堤地基土层中的砂土发生了大面积的液化,导流堤发生了较大的变形,但不至于使导流堤整体向渠心滑移,不会影响到核电厂的安全用水。本文成果对类似工程抗震设计具有一定的参考价值和指导意义。更多还原

【Abstract】 This paper uses the Hardin-Drnevich equivalent linear model and dynamic effective stress analysis method to simulate the dynamic behavior of soil,gets the factor of safety,liquefaction zone distribution and seismic residual deformation of a diversion dike under seismic load of SL1 and SL2.The paper also uses the minimum safety factor and average minimum safety factor in the whole process of an earthquake to evaluate the stability of the diversion dike under different seismic action and evaluates the results.The liquefaction range in the diversion dike foundation is smaller under SL2 than under SL1.So it does not affect the normal use of diversion dike structure.Under seismic load of SL2,diversion dike foundation in sandy soil liquefies over a large area,resulting in large deformation.But the diversion dam does not slide down to the ditch in whole,so the use of water in the nuclear power plant is safe.The results of this paper have a certain reference value and guidance to similar engineering.更多还原