受限空间条件下大吨位桥梁安装技术探讨

Discussion on Installation Technology of Large-tonnage Bridge under Confined Space Conditions

由临时墩、轨道梁及重型桁车等组拼成的T梁安装系统,安全、方便、快捷地实现了下穿贵广高铁的三江至柳州高速公路的泗里口寻江大桥左线1#、2#跨的40m T梁吊装。文章结合该工程实例,介绍了采用跨墩桁车解决作业空间受限条件下的大吨位T梁安装施工要点和注意事项。

The T-beam installation system consisting of temporary piers, track beams and heavy-duty joist barrow can safely,conveniently and quickly realize the 40 m T-beam lifting for 1# and 2# span at left line of Silikou Xunjiang Bridge of Sanjiang-Liuzhou Expressway undercrossing Guiguang High- speed Railway.Based on the engineering example,this article introduced the main points and precau- tions of using the cross-pier joist barrow to solve the installation construction of large-tonnage T- beams under the condition of confined working space.