三峡工程大江截流在前坪试验场预演三峡工程大江截流（即二期围堰截流）自１９９６年１月１８日开始在前坪三峡工程试验场１：８０比尺的动床截流模型上进行预演，至２０日２０点，已顺利完成１０月下旬时段内坝区河段江水为１４０００ｍ‘人流量状态下的围堰进占及龙口合... Rehearsal of the Three Gorges Project at the Qianping Experimental Site Rehearsing the dam closure of the Three Gorges Project (ie, the second-stage cofferdam closure) began on January 18, 1996 at the pre-runoff closure model of 1:80 scale at the Qianping Three Gorges Project Experimental Station , To 20:00 on the 20th, has been successfully completed in late October within the dam section of the river for the 14000m ’flow of cofferdam occupancy and Longkou fit ...