中国水电四局的施工人员在沙河渡槽一标段的工地上紧张施工（10月21日摄）。南水北调中线规模最大、技术难度最复杂的控制性工程之一的沙河渡槽工程目前正在紧张施工，总体工程量已完成约三分之二。其中由中国水电四局承建的沙河渡槽工程一标段预计在本月底实现贯通。在施工过程中，中国水电四局的工程技术人员克服渡槽预制件体型巨大、钢筋笼整体绑扎和吊装难度大、渡槽混凝土预制难度大等许多施工难点，所采用的Ｕ形双向预应力结构和现场预制架槽机架设施工方法，填补了国内外水利行业大流量渡槽设计及施工的技术空白。沙河渡槽工程位于河南省鲁山县境内，于2009年12月30日开工建设，是国家南水北调中线工程的重要项目之一，是为帮助“南水”穿越平顶山境内的沙河、大浪河等河流“北上”而修建的大型水利设施，工程投资26亿元，全长11.938公里。新华社记者 鲁鹏 摄     China's hydropower construction personnel innings in a section of the aqueduct of the site construction nervous(Taken on October 21,).The largest of south-to-north water transfer/Technical difficulties the most complex controlling engineering of one of the aqueduct project is currently tense construction,The total quantity of completed about two-thirds.Of which China's hydropower construction of four of the aqueduct project section at the end of this month is expected to achieve a breakthrough.In the construction process,China's hydropower innings of engineering and technical personnel to overcome aqueduct casting size large/Steel reinforcement cage whole bundle and lifting is difficult/Prefabricated concrete aqueduct is difficult and many other construction difficulties,The U two-way prestressed structure and the site precast frame slot machine erection construction method,Fill the water conservancy industry at home and abroad large flow aqueduct design and construction technical blank.Shahe aqueduct project in henan province is located in the territory of LuShanXian,On December 30, 2009 to start construction,Is the national south-to-north water transfer project is one of the important projects,Is to help"South water"Through the mesa of within the territory of the/The river river"north"Built large water conservancy facilities,Project investment is 2.6 billion yuan,Total length of 11.938 kilometers.Xinhua news agency reporters LuPeng perturbation

     中国水电四局的施工人员在沙河渡槽一标段的工地上紧张施工（10月21日摄）。新华社记者 鲁鹏 摄      China's hydropower construction personnel innings in a section of the aqueduct of the site construction nervous(Taken on October 21,).Xinhua news agency reporters LuPeng perturbation

    中国水电四局的施工人员在沙河渡槽一标段的工地上搬运建材（10月21日摄）。新华社记者 鲁鹏 摄     China's hydropower construction personnel innings in a section of the aqueduct of the site handling building materials(Taken on October 21,).Xinhua news agency reporters LuPeng perturbation