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渡槽是输送渠道水流跨越河渠、道路、山谷等的架空输水建筑物,是灌区水工建筑物中应用最广的建筑物之一,除用于输送渠水外还可排洪和导流等。后张法予应力钢筋混凝土渡槽是渡槽的一种,由于它设计和施工比较复杂,架模不容易,接缝止水施工难度大等,因此应用不是很广泛。但是渡槽可以很好的解决跨度要求大的问题,五常龙凤山灌区卫国干渠八一渡槽采用后张法予应力设计。
The aqueduct is an overhead water conveyance structure with water flowing across river drains, roads and valleys. It is one of the most widely used structures in the hydraulic structures of irrigation areas, and can be used for drainage and diversion of water in addition to conveying canal water . The post-tensioning method is a kind of aqueduct which is used to stress reinforced concrete aqueduct. Due to its complex design and construction, it is not easy to die-mold and the construction of joints is difficult and so the application is not very extensive. However, the aqueduct can well solve the problem of large span requirements. The post-tension method is used to design the stress strain for the Bayi Aqueduct in the Weiguang Longfengshan irrigation area.