论文部分内容阅读
有灌溉的农业才是有保证的农业。20世纪六七十年代,在“水利是农业的命脉”和“以粮为纲”的政策及口号下,身处山区的建设者们兴建水库,发展灌区,其中以自流灌区居多,占到了当时可灌耕地面积的87%,为当时的农业发展起到了积极的促进作用。但时至今日,山区灌区工程已大量弃置和报废,现存灌区很多面临着全部失效的危险,已在一定程度上影响了农村农业的发展。本文以章杨灌区修复实践为例,详细分析了山区自流灌区报废的原因,并以预应力钢筋混凝土预制管在章杨灌区修复实践中的应用,总结了管道在中小型自流灌区修复中的诸多优点。
Irrigated agriculture is guaranteed agriculture. In the 1960s and 1970s, builders in the mountains built reservoirs and developed irrigated areas under the policy and slogan of “water conservancy is the lifeline of agriculture” and “taking grain as the key link.” Among them, Accounting for 87% of the area of irrigated land at that time, which played a positive role in promoting the development of agriculture at that time. However, up to now, a large number of projects in mountainous irrigation areas have been abandoned and scrapped. Many of the existing irrigation districts are in danger of being totally ineffective, which has already affected the development of rural agriculture to a certain extent. Taking Zhangyang Irrigation District as an example, this paper analyzes the reason of scrap in the gravity irrigation district in mountainous area. The application of prestressed reinforced concrete prefabricated pipe in the rehabilitation of Zhangyang Irrigation District is summarized in this paper. advantage.