悬臂箱梁的挂篮施工技术探讨

大多数多孔跨连续箱梁在横跨诸如河流、山谷、铁路、公路等障碍物时会选择悬臂箱梁挂篮技术。整个修筑过程中主要的设备是一对能行走的挂篮———移动式悬臂支架。结束本段施工后,挂篮会对称地向前各移动一个节段,进行下一个梁段的施工,如此循环向前,直至整段悬臂箱梁浇筑完成。结合马岩沟特大桥三角形挂篮施工实例,分析挂篮的施工特点和在施工中应注意的问题,可供同行参考。

Hanging Basket Construction Technology of Cantilever Box Girder

Most of the porous-span continuous box girder aerossing obstacles such as rivers, valleys, railway, and highway choose the cantilever box girder hanging basket technology. The main equipment in the construction process is a pair of hanging baskets which are called mobile cantilever brackets. After the construction of current section, the hanging baskets will move forward to the next section to implement the construction of next girder. The cycle repeats over and over again till the construction of the whole cantilever box girder is finished. Combin- ing with the triangle hanging basket construction practice of Mayangou Grand Bridge, the characteristics of hang- ing basket construction and problems deserving attention in construction are analyzed, which can be consulted by peers.