Prefabricating method of 40m simply-supported box girder

The invention discloses a prefabrication method of a 40m simply-supported box girder. The prefabrication method comprises the following steps: steel bar engineering construction: processing, binding and hoisting steel bars; form board mounting: mounting a bottom form, a side form, an inner form and an end form; concrete engineering construction: pouring and curing concrete; and pre-stress engineering construction: pulling out a rubber pipe, finished steel strand bundle penetrating-in, tensioning, press grouting, sealing anchor and painting a beam-end waterproof coating. The technical problems that the construction cost is high, the risk is high, and the application range of the high-speed railway is not large are solved. 本申请公开了一种40m简支箱梁的预制方法。该预制方法包括：钢筋工程施工：钢筋的加工、绑扎和吊装；安装模板：底模、侧模、内模、端模的安装；混凝土工程施工：混凝土的灌注和养护；预应力工程施工：抽拔橡胶管、成品钢绞线束、张拉、压浆、封锚和涂刷梁端防水涂料；本申请解决了施工成本、风险大，且对高速铁路的适用范围不大的技术问题。