连续箱梁桥的拆除施工技术

Demolishing Construction Technology of Continuous Box Girder in Xi North Canal Bridge

阐述了锡北运河大桥连续箱梁拆除施工,考虑环境,施工条件,中孔拆除后对边孔的影响等因素,通过验算管的强度及刚度,基础承载力,支点强度,计算分析浮运重量,船体吃水深度,贝雷架内力,提出一种拆除连续箱梁的施工方法,保证了拆除施工的安全可靠,实践表明,拆除方案切实可行,旧桥顺利拆除。为今后类似旧桥拆除积累宝贵的施工经验。

Demolishing construction technology of continuous box girder in Xi North canal bridge was introducted, the factors of impact were considered, such as environmental, construction conditions,effect on side hole after middle hole removed, the strength and stiffness of the foundation bearing capacity, Fulcrum strength calculation of floating weight were checked, hull draft and bailey-internal force were analysed, the continuous box girder construction was proposed, and the salty and reliablity of dismantling was guaranteed . Practice shows that programmes were successful. The old bridge was smoothly removed. The valuable demolishing experience was provided for similar old bridges in the future.