京密引水渠兴寿倒虹吸及土城倒虹吸涵洞伸缩缝漏水处理

在水工混凝土结构的设计和施工中,为了适应温度变化及基础不均匀变形,需要设置伸缩缝（结构缝）,由于施工质量差或运行年限较长,伸缩缝常常出现止水失效现象,造成漏水,严重影响水工混凝土结构的正常使用.结合京密引水渠兴寿倒虹吸及土城倒虹吸涵洞伸缩缝漏水缺陷,提出了处理方案,并进行了实施,取得了满意的效果.

Expansion joint rehabilitation of inverted siphon culverts at Xingshou and Tucheng

With consideration of the variation of temperature and differential foundation deformation, expansion joints are applied during the design and construction of hydraulic structures. Because of either poor construction quality or long operation period, the effect of expansion joints material deteriorates over time, and the seepage through the expansion joint is led to, which affects the normal operation of hydraulic structures. The paper introduces the technical measures regarding to the seepage rehabilitation for expansion joint of inverted siphon culverts at Xingshou and Tucheng along the water supply channel from Miyun to Beijing. It works well after the rehabilitation measures are taken.