Prestressed anchor bolt fan foundation reinforcement method

Abstract

The invention relates to a prestressed anchor bolt fan foundation reinforcement method. The prestressed anchor bolt fan foundation reinforcement method comprises the steps that for a prestressed anchor bolt fan foundation with design defects and quality problems, original foundation pier concrete is chiseled away, vertical reinforcements and radial reinforcements extending into a column pier partof an original foundation are reserved, and half of original prestressed anchor bolts are reserved at intervals; the reserved original prestressed anchor bolts are lengthened to form new lengthened anchor bolts; a plurality of circles of vertical embedded reinforcements are arranged on a cantilever plate part of the original foundation; and a new upper foundation reinforcement cage is placed on the reserved original foundation, upper foundation concrete is poured, and the reinforcement cage includes an upper foundation pier and a cantilever plate. The upper foundation is effectively anchored by the reserved vertical reinforcements, the radial reinforcements, the lengthened anchor bolts and embedded reinforcements. Meanwhile, the new prestressed anchor bolts are embedded in the upper foundation pier, a bottom tower barrel is connected with the reinforcement foundation through the lengthened anchors and the new prestressed anchor bolts, the rigidity of a joint is ensured by applying prestress through the lengthened anchor bolts and the new prestressed anchor bolts, and reinforcement of the prestressed anchor bolt fan foundation is realized.

Description

technical field [0001] The application belongs to the technical field of structural engineering, and in particular relates to a method for reinforcing a fan foundation with prestressed anchor bolts. Background technique [0002] With the increase of population, energy and environment have become the two main problems that people are facing. On the one hand, the continuous consumption of traditional fossil fuels prompts people to seek new energy as an alternative; on the other hand, traditional fossil fuels will lead to increased air pollution and carbon dioxide levels, causing the greenhouse effect. [0003] Wind power has the characteristics of clean and pollution-free, large unit capacity, good economic and social benefits, and is currently one of the most promising new energy sources. When the wind turbine is running, the alternating loads such as aerodynamic force, inertial force and elastic force acting on the blades are transmitted to the foundation through the tower,...

AI Technical Summary

Problems solved by technology

This common form of wind turbine foundation needs to pour concrete on site. For wind farms built in remote mountainous areas, commercial concrete cannot be used due to transportation conditions. The concrete mixed on site is affected by many factors, and it is difficult to guarantee the quality, resulting in cracking of the foundation concrete. Serious, such as cracks at the root of the cantilevered slab of the foundation and the partial compression of the concrete under the anchor slab are not satisfied, and are partially crushed, and there are serious quality problems in the foundation

At the same time, due to the complexity of the force of the wind turbine foundation, the traditional prestressed anchor bolt foundation design method is difficult to meet the requirements, and design defects appear. The design height of the foundation column pier is not enough, resulting in splitting cracks in the foundation under the action of prestress and upper load

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