下载后可任意编辑钢绞线在高墩悬浇刚构 0#块托架预压中的应用钢绞线在高墩悬浇刚构 0#块托架预压中的应用 李丽 摘要:高墩连续刚构 0#块采纳堆载预压预压施工时间长,功效低,尤其大跨度刚构施工更为明显。凯羊高速公路摆捞河大桥悬浇刚构 0#块施工托架体系采纳液压千斤顶张拉钢绞线来模拟荷载,将面荷载模拟成等效的多点集中荷载来实现预压。通过采纳液压千斤顶张拉钢绞线预压能够很好的解决高墩连续刚构 0#块预压难题,为同类工程施工提供借鉴。 Abstract: High-pier continuous rigid frame 0# block adopts preloading and preloading construction time is long, and the efficiency is low, especially the construction of large-span rigid frame is more obvious. The construction bracket system of the pendant rigid frame 0# block of the Bailao River Bridge of Kaiyang Expressway adopts hydraulic jack tensioning steel strand to simulate the load, and the surface load is simulated as an equivalent multi-point concentrated load to achieve preload. By adopting hydraulic jack tensioning steel strand pre-compression, it can solve the pre-compression problem of high-pier continuous rigid frame 0# block, and provide reference for similar engineering construction. 關键词:悬浇刚构;钢绞线;张拉;托架预压 Key words: cantilevered rigid frame;steel strand;tension;bracket preload 中 图 分 类 号 : U445 文 献 标 识 码 : A 文章编号:1006-4311(20XX)14-0165-03 1 工程概况 摆捞河大桥为跨越摆捞河而设,主桥为 65m+120m+65m 一联三跨预应力混凝1下载后可任意编辑土连续刚构桥,全长 250m,采纳上下行分离的两幅桥,宽 21.5m。12#、13#墩为主墩,由两片薄壁墩组成,薄壁墩为矩形空心截面,横桥向 7.0m,顺桥向2.5m,两片墩间净距为 5.0m,墩高分别为 72m 和 77m。墩身上端与箱梁固结,下端与承台固结。根据桥梁结构形式,采纳托架现浇 0#块和挂篮施工普通块段的施工方案。主桥上部箱梁为变截面单箱单室断面,箱梁顶板宽 10.5m,xxxx;箱梁高度(梁高以裸箱梁低侧腹板处箱梁顶面到箱梁底面的距离计)在主墩与箱梁相接的根部断面...