三峡永久船闸是三峡工程三大主体工程之一，是2003年发电控制性工程之一，也是当今世界上规模最大、水头最高、技术最复杂的多梯级通航建筑物．1995年12月22日，由武警水电部队承建的三峡永久船闸一期开挖工程提前8天完成任务．历时20个月，开挖土石方近2000万m3，平均月开挖强 The permanent ship lock of the Three Gorges Project is one of the three major projects of the Three Gorges Project and one of the power generation control projects in 2003. It is also the largest multistage navigable building in the world with the largest scale, the highest water head and the most complicated technology. On December 22, 1995, the first-stage excavation of the permanent ship lock of the Three Gorges constructed by the Armed Police Hydropower Troops completed its task eight days in advance. Lasted 20 months, nearly 20 million cubic meters of earth excavation, the average monthly strong excavation