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长江三峡西起重庆奉节,东至湖北宜昌,全长205千米。自西向东主要有3个大的峡谷地段:瞿塘峡、巫峡和西陵峡。三峡因而得名。三峡两岸高山对峙,崖壁陡峭,山峰一般高出江面1000米～1500米。最窄处不足百米。三峡是由于这一地区地壳不断上升,长江水强烈下切而形成的。水力资源极为丰富。在中国社会科学院工业经济研究所专家和学者评选出的“中国工业改革开放30年最具影响力的30件大事”中,长江三峡水利枢纽工程(简称三峡工程)位列其中。三峡工程包括一座混凝重力式大坝,泄水闸,一座堤后式水电站,一座永久性通航船闸和一架升船机。三峡工程建筑由大坝、水电站厂房和通航建筑物3个部分组成。大坝坝顶总长3035米,坝高185米。水电站装机左岸设14台,右岸设12台,共26台,前排容量为70万千瓦的小轮发电机组。它是迄今世界上综合效益最大的水利枢纽,在发挥巨大的防洪和航运效益外,其1820万千瓦的装机容量和847亿千瓦的年发电量均居世界第一。2006年5月,三峡大坝全线建成。它位于湖北省宜昌县(今宜昌市夷陵区)三斗坪镇,全长2309米,全线浇筑达到设计高程海拔185米,是世界上规模最大的混凝土重力坝。三峡工程总工期长达18年(1992年～2009年),作为一个现代化的巨型水利水电工程,其科技含量之高,难题之多,均属国内外罕见。为了攻克一个个科技难关,民兵在这个“大舞台”上一竞风流。让我们把目光转向宜昌,去看看当时的宜昌民兵们是如何“科技攻关,建功三峡”的。
Yangtze Three Gorges Fengjie from Chongqing, Yichang, Hubei Province, a total length of 205 km. From west to east, there are mainly three large gorges: Qutang Gorge, Wu Gorge and Xiling Gorge. The Three Gorges hence the name. The two sides of the Three Gorges mountain confrontation, steep cliffs, peaks generally higher than the river 1000 meters to 1,500 meters. The narrowest point less than 100 meters. The Three Gorges are formed by the crustal rise in the area and the intense undercutting of the Yangtze River. Water resources are extremely rich. Among the 30 most influential events in 30 years of China’s industrial reform and opening-up “selected by experts and scholars from the Institute of Industrial Economics of the Chinese Academy of Social Sciences, the Three Gorges Project of the Three Gorges Project (referred to as the Three Gorges Project) ranks among the three. The Three Gorges Project includes a concrete gravity dam, a sluice gate, a post-embankment hydropower station, a permanent navigation lock and a shiplift. Three Gorges Project construction by the dam, hydropower plant and navigable buildings composed of three parts. Dam dam top total length of 3035 meters, 185 meters high dam. There are 14 hydropower stations on the left bank and 12 units on the right bank, with a total of 26 units and a small capacity of 700,000 kilowatts in the front row. It is the world’s most comprehensive water conservancy hub, in exerting great flood control and shipping benefits, its 1820 kilowatts of installed capacity and 84.7 billion kilowatts of annual generating capacity ranked first in the world. May 2006, the Three Gorges Dam completed across the board. It is located in Sandouping Town, Yichang County, Yichang City, Hubei Province (now Yiling District, Yichang City), with a total length of 2309 meters. It has the design elevation of 185 meters and is the largest concrete gravity dam in the world. The total construction period of the Three Gorges Project has reached 18 years (from 1992 to 2009). As a modern giant water conservancy and hydropower project, its high technological content and many problems are rare at home and abroad. In order to overcome the technological difficulties, the militia is competing in this ”big arena.“ Let us turn our attention to Yichang, to see how the Yichang militia at that time ”scientific and technological research, building the Three Gorges ".