运行中双孔污水箱涵修复技术

Repair Technology of Double-chamber Sewage Box Culvert under Operation

随着运行年限的增加,在不影响运行的情况下对大型污水干管的损坏部位进行修复已成为亟待解决的问题。以上海某段约4.7 km的双孔老箱涵的修复工程为例,通过采取箱涵顶开孔、中隔墙渗漏伸缩缝的水下临时封堵、内壁外贴橡胶止水带封闭渗漏伸缩缝、箱涵底部土体加固以及运行配合等一系列措施,对运行中严重渗漏的双孔老箱涵成功实施修复,为其它大口径排水管道或箱涵的修复提供借鉴。

With the increment of operation years, the repair of the damaged position of the large sewage trunk pipe has become the problem urgently for solving under the condition not to affect the operation. Taking the repair project of an old 4.7-m double-chamber box culvert of Shanghai as an example, the article introduces a series of measures, i.e. holing at the top of box culvert, the temporary underwater closure of middle wall leakage expansion joint, the rubber waterstop pasted on inner wall to seal the leakage expansion joint, the reinforcement of soil at the bed of box culvert and the operation taken for the successfully implementation repair of an old seriously leaked double-chamber box culvert under operation, which can be referenced for the repair of the other large-diameter drainage pipelines and the repair of box culvert.