Method for repairing draught fan concrete foundation cavity through high polymers

Abstract

The invention discloses a method for repairing a draught fan concrete foundation cavity through high polymers. The method comprises the following steps of 1, appearance analysis and detection, 2, closed circuit television detection, 3, cavity connectivity high-pressure gas detection, 4, injection tube cap manufacturing, 5, injection tube cap installation and 6, high-pressure injection of the highpolymers, thereby completing repairing of the draught fan concrete foundation cavity through the high polymers. The non-excavation rapid maintenance method not requiring a draught fan to stop runningis provided in order to solve implicit diseases such as disengagement in a wind power large-size concrete structure and looseness of a foundation ring, and the method has a low degree of constructiondisturbance, high efficiency and remarkable technical advantages and economic and social benefits as well as broad application prospects.

Description

technical field [0001] This technology belongs to the facility foundation maintenance and repair technology, and specifically relates to the non-excavation high polymer maintenance technology for wind farm fan concrete foundation holes and fan foundation ring loosening diseases. Background technique [0002] Wind power is a clean and green renewable energy, which is of great significance to solve the energy crisis, reduce environmental pollution, and adjust the energy structure. With abundant wind energy resources, my country is the country with the fastest growing wind power generation and the largest scale in the world, and the installed capacity of the wind power industry ranks first in the world. [0003] The foundation ring is the pre-embedded part of the basic equipment supporting the tower structure. The foundation flange ring and the bottom foundation platform are a reinforced concrete composite structure. Due to factors such as wind turbine construction, micro gaps...

AI Technical Summary

Problems solved by technology

During the operation process, the upper part of the wind turbine drives the foundation ring and the connecting flange to repeatedly generate relative displacement friction with the concrete foundation under the action of wind load, which increases the gap between the foundation ring and the concrete and creates a potential safety hazard.

The existing technology is: pouring cement or epoxy grouting material into the gap through drilling or anchor rods, the fan needs to be shut down during the repair process and the curing period is long; after the waterproof between the concrete cap and the tower tube fails, rainwater seeps down, The water-binder ratio of the poured concrete is not up to the standard; the cement material after pouring is easy to peel off from the original cement concrete base, and due to the dry shrinkage characteristics, the cracks and cavities cannot be well filled and reinforced, and the repair effect is not ideal

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