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河南省某地下桥,穿过京广线,横越十二股道。该桥长近80m,自东向西分4节进行预制和现浇。预制的箱涵采用中继顶进的方法施工,箱涵的节间变形缝用遇水膨胀橡胶止水带封闭地下水。当采用井点降水帮助施工的水泵停用不久,便发现有些节间缝及其附近的箱涵底板出现严重渗漏水。针对这一情
An underground bridge in Henan Province, across the Beijing-Guangzhou line, across the 12 shares Road. The bridge is nearly 80m long and is prefabricated and cast in 4 sections from east to west. The prefabricated box culvert is constructed by the method of relay jacking, and the internodal deformation joint of the box culvert is sealed with groundwater by a rubber water-sealing rubber water-proof rubber band. When the use of well point precipitation to help construction of the pump stopped shortly, we found some of the joints and near the floor of the box culvert serious leakage of water. Against this situation