(一)概述去年四月,在麻城县永红水库输水管闸门竖井井身施工中,采用了混凝土工字型预制模板,收效良好。如图1所示,该竖井内设有工作闸门和检修闸门。竖井断面为圆形,其外圆直径3.3米、内圆直径2.6米。由于竖井井身高出地面十多米,按工程设计,原计划需要木材40多立方 (A) Overview In April last year, in the construction of shaft wells in the sluice gates of Yonghong Reservoir in Macheng County, Macquarie, concrete I-shaped prefabricated slabs were used, which achieved good results. As shown in Figure 1, there are working gates and service gates in the shaft. Shaft section is circular, the outer diameter of 3.3 meters, the inner diameter of 2.6 meters. As the vertical well shaft above the ground more than 10 meters, according to the project design, the original plan requires more than 40 cubic meters of timber