大吨位履带吊更换钢混结合梁施工技术

Construction technique of steel-composite girders replaced by large tonnage crawler crane

既有铁路高墩、大跨度桥梁的换架技术是换梁施工中的一个难题,此文通过对丰沙大线永定河8号桥1孔40 m钢混结合梁吊装方案的比选与实施,具体介绍了利用大吨位履带吊换梁施工的技术关键与实施过程,对同类工程具有借鉴意义。

The replacement and re - erection technique of high pier and large span bridges is a hard nut to crack in the girder replacement construction. This article, through the comparative selection and implementation of the lifting scheme for the 1 - 40m steel composite girders of Bridge No. 8 of the Yongding River on Feng - Sha - Da line, makes an introduction to the technical key and implementation process of the girder replacement and re - erection construction by the large tonnage crawler crane, which is of reference to works of similar nature.