葛洲坝水利枢纽布置有大江和三江两条航线,大江有一号船闸,三江有二、三号两个船闸。在大江一号船闸上闸首,有一道平板式事故检修门,门体长35.3m,厚5.17m,高11m,总重量217t。设置在左右提升楼上的两台2×160t卷扬机,是门体的提升机构,两吊点间的距离为35m,最大提升为度28m,如图1所示。 Gezhouba Dam is equipped with two major routes, the Dajiang River and the Sanjiang River. There are one ship lock in the Dajiang River and two ship locks in the Sanjiang River. At the gates of the Dajiang No.1 ship lock, there is a flat-panel accident inspection door with 35.3m in door length, 5.17m in thickness and 11m in height with a total weight of 217t. Two 2 × 160t winches, which are installed on the left and right, are the hoisting mechanism of the door. The distance between the two hanging points is 35m and the maximum lifting degree is 28m, as shown in Figure 1.