闸坝上部桥梁现浇砼模板支撑施工技术

Cast-in-site concrete formwork support technology applied for bridge construction over gate dam

中、小型水电站及水闸的上部桥梁(交通桥、工作桥等)现浇砼模板支撑结构采用工字钢梁,其施工工艺简单,可操作性强,汛期施工时不受基坑过流影响,所使用钢结构可重复使用和回收利用,搭设及拆除用时少,不仅可以节省大量物力、财力,汛期基坑过流也不影响上部结构施工,既经济又可加快工程施工进度,施工质量与施工安全得到保证。

For the cast-in-site concrete formwork of access bridges over gate dams of mid-or small-scale hydropower stationor water retaining gate,I-beam supporting steel works involves simple technique;permits convenient construction;is not affected by water flow into the fonndation pit in flood period;is recoverable;requires short time for installation and dismantling;avoids steel pipe frames from base slab to bridge bottom,so it not only renders much less construction cost,but also accelerates construction progress while ensuring construction quality and safety.