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随着国家对农业综合开发和基础农田水利项目的投入增大,U型渠在其中得到了越来越广泛的使用。U型渠断面接近水利最优断面,具有输水性能优良、防渗效果好、抗冻胀性能高、节省用地、省工省料、整体性好、坚固耐用等优点,适用于各种施工条件。目前农业综合开发和农田水利项目中,U型渠一般多采用预制U型槽进行施工,也有部分项目采用混凝土现场浇注的方式。一般来说U型渠的施工效果还不错,但从目前淮滨县的在建U型渠项目中,大部分是采用预制U型槽的U型渠,该类型U型渠完工后不久就会出现裂缝和沉降,甚至因施工过程中进水口与出水口设置不合理导致当地农民人为破坏的现象。因此要将U型渠施工好,掌握其施工过程及施工技术,显得十分重要。
As the state’s investment in comprehensive agricultural development and basic farmland water conservancy projects have increased, U-shaped channels have been used more and more widely. The section of U-shaped channel is close to the optimal section of water conservancy. It has the advantages of excellent water delivery, good seepage prevention effect, high anti-frost heaving performance, saving land, saving labor and materials, good integrity and durability, and is suitable for various construction conditions . At present, in the comprehensive agricultural development and farmland water conservancy projects, U-shaped channels generally use prefabricated U-shaped grooves for construction, and some projects adopt the method of on-site pouring of concrete. Generally speaking, the construction effect of U-shaped canal is not bad, but from the current U-shaped canal under construction in Huaibei County, most of them are U-shaped canals with prefabricated U-shaped channels which will be completed shortly after completion Cracks and subsidence occurred, and even the man-made damage caused by the irrational inlet and outlet of the construction process led to the local farmers. Therefore, it is very important to construct the U-shaped canal well and grasp its construction process and construction technology.