一、实行缝墩一次浇筑的原因在土质不均匀的地基上为防止水闸基础不均匀下沉,在底版分块接头处,常常设计成缝墩(图1), 以保护建筑物的安全。缝墩为两个墩组成,中间隔有5～6公分宽的接缝,缝中需做防水设施,以阻挡上游的水流入。在以往施工中,因没把握做好接缝,所以采用二次浇筑法。就是先做一个墩,以后再做相邻的另一个墩,这样不但增加了工作量,也延长了工程日期。在永定河引水工程攔河闸施工中,实行了缝墩—次浇筑法,基本上获得了成功。今将有关缝墩接缝施 First, the implementation of a pier pouring reasons uneven soil uneven foundation in order to prevent sluggish sinking sub, in the bottom piece joints, often designed as a pier (Figure 1), in order to protect the safety of buildings. The piers are composed of two piers, with seams of 5 to 6 cm wide in the interval. Waterproof facilities are to be made in the seams to prevent the inflow of water upstream. In the past construction, because they did not grasp the seam, so the use of secondary pouring method. It is to first make a pier and later to make another adjacent pier. This will not only increase the workload but also extend the project date. In the Yongding River diversion project sluice construction, the implementation of the pier - sub-pouring method, basically achieved success. This will be related to seam piercing joint facilities