Wind Turbine Prestressed Foundation Structure

Abstract

The invention discloses a wind turbine generator prestress foundation structure, relates to the field of wind turbine generator foundation structures, and solves the problems of obvious increment of the reinforcement ratio of main beams, cost increment, small reinforcement gap, bad construction operation and influence on the structural concrete safety in a beam slab type wind turbine generator foundation structure adopted by a large wind turbine generator. The wind turbine generator prestress foundation structure is in a beam slab form, and comprises a foundation baseplate; the middle part ofthe foundation baseplate is a table column; a maintenance hole is formed in the table column; discrete main beams are uniformly distributed around the table column; prestress steel ropes are arrangedin the main beams to replace traditional longitudinal ribs; foundation structure concrete is mainly prestress concrete; the prestress steel ropes are tensioned by adopting a back tension method; and the maintenance work of the prestress steel ropes can be performed by entering a foundation through the maintenance hole. Through the idea of introducing the prestress concrete, the steel consumption is reduced, the cost is saved, the construction is convenient, the casting quality is guaranteed, and the maintenance is convenient.

Description

technical field [0001] The invention relates to the field of foundation structures of wind turbines, in particular to a prestressed foundation structure of wind turbines. Background technique [0002] At present, shallow-buried gravity-type extended foundations, that is, conventional slab foundations, are widely used in onshore wind power projects. This type of foundation has the advantages of shallow foundation pit excavation and fewer construction procedures during construction. In order to improve the economy, the structural type of the conventional slab foundation is optimized as a beam-slab foundation. Since the concrete stress level of the beam-slab foundation is higher, it can give full play to the ability of the concrete to resist compression and the steel to resist tension, and has significant economic properties. According to statistics, for the superstructure of the same wind turbine in the same project, the construction cost of the beam-slab foundation is 10% lo...

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Problems solved by technology

[0006] The invention provides a prestressed foundation structure for wind turbines, which solves the problem that large-scale wind turbines adopt the existing beam-slab type wind turbine foundation structure. In order to meet the requirements of concrete cracks and deflection checks, the reinforcement ratio of the main beam is significantly increased, which not only increases the cost, but also increases the cost. Small spacing between steel bars is not conducive to construction operations and affects the safety of structural concrete

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