Study On Optimum Design Of Shallow - Buried Steel Lining Reinforced Concrete Penstock In Hydropower Station

With the development of water conservancy and hydropower engineering business, many high HD value of hydropower penstock increased used of steel lined reinforced concrete pipeline structure. Steel lined reinforced concrete pipes of hydropower, as a new structure, has the advantages of economic security and the construction is simple. This piping which laid on downstream surface of dam, least weaken the integrity of the dams, but also to avoid interference between the construction of the dam concrete and steel pipe installation. Because of these advantages, in recent years, this new structure has been adopted by a number of domestic and international engineering station.This paper describes the development of steel lined reinforced concrete pipes, summed up the steel-lined reinforced concrete pipes protruding structural advantages and design research, analyzed the mechanical characteristics of steel lined reinforced concrete pressure pipeline, including the outsourcing of concrete, steel-lined pipe stress and strain distribution characteristics and concrete cracking tendency. It focuses on designs of nonlinear analysis of steel lined reinforced concrete penstock structure and the Finite Element Method.In this paper, with the FEM sofeware ABAQUS as the basis, steel lined reinforced concrete pressure conduit in hydropower station as an example, the stress state of steel lined reinforced concrete pressure pipeline are analyzed. Utilizing the nonlinear constitutive relationship of concrete material, using the Finite Element Method, combined with engineering examples, steel lined reinforced concrete pipes made of three-dimensional finite element model. With the increase of water pressure, steel lined reinforced concrete penstocks’force analysis is performed. The outsourcing thickness of concrete, the thickness of the steel liner tube and the gap between outsourcing of concrete and steel-lined pipes as the parameters, steel lined reinforced concrete penstocks’force analysis is performed. Taking into account the relationship between the parameters and capacity and cracking conditions of steel liner and concrete structures. Analysis obtained calculation data, and the conclusion for designing of steel lined reinforced concrete pressure pipeline structure has a certain extent guiding significance.