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235国道盱眙北段及盱眙绕城段改扩建工程溜子河特大桥便桥平台专项方案编制人：审核人：批准人：235国道盱眙北段及盱眙绕城段改扩建工程明蛤段项目部二O一四年十一月目录第1页共50页第一部分：便桥及钻孔排架结构设计........................................4一、主要技术标准........................................................5二、编制依据和参考文献..................................................5三、便桥平面布置........................................................5四、便桥结构布置........................................................64.1便桥纵桥向布置（标准联）........................................64.2便桥结构断面....................................................6五、钻孔平台结构布置....................................................85.1钻孔排架与墩身相对位置..........................................85.2排架纵向布置....................................................95.3排架平面布置....................................................95.4排架结构断面...................................................10第二部分：结构检算.....................................................11一、便桥结构检算.......................................................111、项目概况............................................................112、遵循的技术标准及规范................................................112.1技术标准.......................................................112.2设计规范.......................................................113、主要材料及技术参数..................................................134、设计工况及荷载组合..................................................135、钢便桥设计..........................................................145.1上部结构设计..................................................145.2桥面宽度......................................................145.3纵向整体计算...................................................145.4盖梁检算.......................................................175.5单桩承载力.....................................................206、桥面板及横梁检算....................................................226.1建立模型.......................................................226.2施加约束和荷载.................................................236.3检算结果.......................................................23二、钻孔排架结构检算...................................................261、工况................................................................272、检算模型............................................................273、施加荷载和约束......................................................274、结构总体变形情况....................................................285、25号工字钢横梁强度..................................................286、横梁刚度............................................................297、双拼45号工字钢强度.................................................298、盖梁刚度............................................................30三、结论与建议.........................................................30第三部分：施工组织.....................................................32一、施工方法...........................................................32二、施工工艺流程.......................................................322.1便桥安装示意...................................................322.2工艺流程..............................