【摘要】 以采用水泥粉煤灰碎石桩(CFG桩)复合地基进行地基处理的核电站为研究对象,探究该地基处理方案在核电厂建设中的使用可行性,建立了基于拟静力法的核电站CFG桩复合地基地震承载力分析模型。对模型施加三向地震动作用,分析复合地基在地震作用下的极限承载力以及极限状态下应力、应变和塑性区的分布特征。由模拟结果可知,CFG桩复合地基的地震承载力基本满足要求,只要适当增大复合地基角桩的截面尺寸,采用CFG桩复合地基方案来处理核电天然厂址是可行的。同时,综合考虑土体变形、CFG桩的失效来判断复合地基的破坏是合理的。更多还原

【Abstract】 The bearing capacity of CFG piled composite foundation under earthquakes in nuclear power station was studied based on the quasi-static method,in order to explore the possibility of this foundation treatment scheme being used in the construction of nuclear power plant. According to relative specifications,the earthquake was excited in three directions with increasing amplitude. For the nuclear power station studied in this research,its ultimate state was governed by the soil deformation and stress of the CFG piles. The ultimate bearing capacity and the distribution of stress,strain,plastic zone in ultimate state were studied. The results showed that the use of CFG composite foundation in construction of nuclear power plant is practicable.更多还原