三峡工程截流施工稳步推进三峡工程上、下游围堰现已分别形成４６０ｍ宽和５４０ｍ宽的口门，至此，以预进占施工为标志的大江截流工程第一阶段目标基本实现。三峡大江截流及二期围堰工程将分成４个重要阶段展开施工。第一阶段以１９９７年汛前完成进占施工为标志；第二阶... The closure of the Three Gorges Project has steadily promoted the upstream and downstream cofferdams to form 460m wide and 540m wide doorways respectively. By now, the first phase of the major river closure project under the pre-seizure construction has basically taken shape. Three Gorges River closure and Phase II cofferdam project will be divided into four major phases to start the construction. The first phase of the pre-flood in 1997 completed the construction mark; second order ...