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悬臂浇注法作为梁桥施工中一种成熟的工艺在拱桥的施工中得到越来越多的应用,其主要特点是受施工场地限制小,施工工序相对简单,造价低,比较经济。国外常用塔架、斜拉索及挂篮浇注拱桥,也有借助于专用挂篮,结合使用斜吊钢筋浇注拱圈的,国内应用较少。笔者结合工程实例,介绍了拱桥悬臂浇注施工的关键工艺,包括墩顶0#块施工、预应力混凝土、悬臂段施工、挂篮设计与施工、中跨合龙施工等,供类似拱桥施工参考。
As a mature technology of beam bridge construction, cantilever casting method is applied more and more in the construction of arch bridge. Its main features are limited by construction site, relatively simple construction procedure, low cost and economy. Commonly used abroad tower, stay cable and hanging basket pouring arch bridge, but also with the help of special hanging basket, combined with diagonally inclined steel pouring arch, less domestic applications. The author introduces the key technology of cantilever pouring construction of arch bridge, including construction of 0 # block, prestressed concrete, cantilever construction, hanging basket design and construction, midspan and co-construction of arch bridge.