湫湖灌区1号过水桥改造工程设计与计算

摘要:

过水桥在丘陵灌区应用十分广泛,其广泛的应用为丘陵地区跨流域调水提供了便利基础条件。该文介绍湫湖灌区一号过水桥改造情况,为满足过水桥的设计过流能力及减少占地等要求,改造后过水桥的断面及跨度均有所增加。过水桥30m跨度槽身采用后张法预应力技术,通过三维有限元分析计算,表明通过预应力钢筋的施加,可以大大减少运行期的混凝土拉应力,提高了结构的安全度。

Abstract:

aqueduc is widely used in hilly irrigation area, and its extensive application provides convenient basic conditions for cross-watershed water transfer in hilly area. This paper introduces the reconstruction of No. 1 aqueduc. In order to meet the requirements of the design flow capacity of the aqueduct and reduce the footprint, the section and span of the aqueduct are increased after the reconstruction. The 30m span groove body of the water bridge adopts post-tensioning prestress technology. Through three-dimensional finite element analysis and calculation, it is shown that the concrete tensile stress during operation can be greatly reduced by the application of the prestressed steel bar, and the safety of the structure is improved.