一、前言葛洲坝枢纽二、三号船闸,是我国目前水级最高的大中型单级船闸,最大设计水头27.0米,闸室有效尺寸分别为280×34×5米和120×18×3.5米(长×宽×槛上水深)。闸室输水二号船闸采用底部纵横支廊道三区段出水系统;三号船闸为底部纵支廊道 I. Introduction Gezhouba Project II and III shiplocks are the largest and medium-sized single-stage shiplocks in China at present with a maximum design head of 27.0m and effective chamber sizes of 280 × 34 × 5m and 120 × 18 × 3.5m respectively Length × width × threshold on the water depth). Lock chamber water delivery No. 2 ship lock at the bottom of the three sections of vertical and horizontal corridor water outlet system;