局部顶升在桥梁拼宽支座更换施工中的应用

Application of Partial Lift-up in Bearing Replacement Construction of Bridge Widing

以某高速公路改选连续箱梁桥拼宽支座更换项目为研究对象,详细介绍了局部顶升在连续刚构桥梁支座更换中的具体控制要点和操作步骤,给出了在顶升过程中的具体控制参数,并通过实测值与理论计算进行比较,阐明了局部顶升在跨度≤20m的桥梁中更换支座的可行性以及数据的可控性。

Based on a bearing replacement project in a widen continuous box girder highway bridge,this paper described in detail control points and the specific steps of partial lift-up in bearing replacement for continuous box girder. Control data in specific process were given. Then measured values and calculated values were compared.At last, it clarified feasibility and data controllability of partial lift-up in bearing replacement for bridges with spans less than 20 metres.