桥梁沉井基础施工风险主成分分析法
Abstract
提出了桥梁沉井基础施工风险主成分分析法,并将该方法应用于武汉鹦鹉洲长江大桥北锚沉井基础施工风险分析中.通过构建北锚沉井基础风险因素和施工工序对应关系矩阵,获得了北锚沉井基础的风险因素在3个降维后的施工工序(主成分)中的排名情况.结果表明,沉井施工对周围建筑物产生影响和井底流沙在沉井接高下沉中风险较大;井壁强度不足在钢壳制作中风险较大;前期组织不完善在前期准备中风险较大.
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Key words
open caisson foundation,construction procedure,risk factor,preventive measure
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