基于拟静力法的核电站水泥粉煤灰碎石桩复合地基的地震承载力研究  

STUDY ON SEISMIC BEARING CAPACITY OF CFG PILED COMPOSITE FOUNDATION FOR NUCLEAR POWER STATION BASED ON QUASI-STATIC METHOD

作　　者：颜秋菊[1] 钟红[1] 李红军[2] 

机构地区：[1]大连理工大学海岸和近海工程国家重点实验室,辽宁大连116024 [2]中国水利水电科学研究院岩土所,北京100044

出　　处：《工业建筑》2017年第1期40-43,78,共5页Industrial Construction

基　　金：国家自然科学基金项目(51579033;51138001)

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。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.

关 键 词：CFG桩 复合地基 拟静力法 地震响应 承载能力 

分 类 号：TU470[建筑科学—结构工程]