重庆朝阳嘉陵江大桥桥墩围堰防渗技术

Research of pier cofferdam of Chongqing Chaoyang Jialing River Bridge

为了解决重庆朝阳嘉陵江右线大桥1#桥墩施工围堰平台采用片石笼结合编织袋填筑而成,坡度大、渗径短、架空结构严重的问题;本文提出了采用水泥膏浆防渗处理方案。施工结果表明,新型水泥膏浆适合于较大孔隙地层的动水堵漏,是桥墩围堰防渗的一种有效手段,较常规连续墙围堰防渗缩短工期50%以上,可供类似工程参考和借鉴。

In order to solve the fight line of the Jiangling River in Chongqing Chaoyang Bridge pier cofferdam 1# on-chip platform with woven gabion filling made, steep slope, seepage path is short, serious problems of overhead structure; this paper, using cement paste seepage control plan. The results show that the construction of the new cement paste is suitable for large hydrodynamic porous formation plugging, pier cofferdam is an effective means than the conventional diaphragm wall cofferdam shorten the construction period more than 50%, for similar projects reference and reference.