流溪河大桥主桥拆除施工技术

发布时间：2018-05-25 06:40

本文选题：刚构桥 + 预应力混凝土结构　；参考：《桥梁建设》2014年06期

【摘要】：流溪河大桥主桥为带挂梁的预应力混凝土T形刚构桥,由于交通量剧增,主桥桩基下沉,需拆除,提出利用2台50m架桥机联体并与主桥0号块临时固结,依次拆除左幅25mT梁和T构箱梁的11号块至1号块,将架桥机横移至右幅桥,按照左幅桥拆除方式拆除右幅桥。在悬挂T梁拆除过程中,采用逐片拆离的思路,先切割T梁片之间的连接,将2片T梁做为1组,并遵循"移梁不移机"的原则,采用顶升滑道方式横移T梁,最后将T梁吊离。在主桥T构箱梁拆除过程中,先安装吊具,按顺序切割箱梁顶板、底板、腹板,在箱梁节段分体后,利用牵引装置使梁体在空中转体,最后将梁体吊离。
[Abstract]:The main bridge of Liuxihe Bridge is a prestressed concrete T-shaped rigid frame bridge with hanging beam. Because of the rapid increase of traffic volume and the sinking of pile foundation of the main bridge, it is necessary to remove the pile foundation of the main bridge. It is proposed that two 50m bridge erectors are connected and temporarily consolidated with block 0 of the main bridge. The blocks 11 to 1 of the left 25mT beam and T box girder were removed in turn, and the bridge erecting machine was moved horizontally to the right frame bridge, and the right frame bridge was removed according to the way of the left frame bridge removal. In the course of removing the suspended T-beam, the idea of removing the T-beam one by one, cutting the connection between the T-beams first, taking two T-beams as a group, following the principle of "moving beam without moving machine" and adopting the way of jacking slide way to transversely move the T-beam, is adopted in the process of removing the suspended T-beam. Finally, the T beam is hoisted away. In the course of removing the T-structure box girder of the main bridge, the suspenders are installed first, and the top, bottom and web of the box girder are cut sequentially. After the section of the box girder is divided, the beam is rotated in the air by the traction device, and finally the beam is suspended.
【作者单位】：华南理工大学土木与交通学院;
【基金】：国家自然科学基金项目(51208208) 中国博士后科学基金项目(2013M542174) 中央高校基本科研业务费专项资金资助项目(2014ZZ0019,2013ZB0004)~~
【分类号】：U445.6

【参考文献】