Anti-deformation rectifiable foundation applicable to wind turbine generator in goaf site, and construction method thereof

Abstract

The invention discloses an anti-deformation rectifiable foundation applicable to a wind turbine generator in a goaf site, and a construction method thereof. The foundation comprises a gravel cushion located in a foundation pit, wherein the gravel cushion is laid on a foundation, and a concrete cushion is laid on the gravel cushion; a lower asphalt felt layer is laid on the concrete cushion, a concrete bottom plate is laid on the lower asphalt felt layer, a main beam and an auxiliary beam which are located in a poured concrete layer are arranged above the concrete bottom plate, a cavity is reserved in a part corresponding to a connection position of a main beam and an auxiliary beam of a raft plate, of the concrete bottom plate, and an overhaul well which is vertically arranged is communicated to the cavity; a bolt connected with the main beam is pre-embedded into the concrete bottom plate; and an upper asphalt felt layer and the poured concrete layer are sequentially arranged above theconcrete bottom plate, and foundation assembling reinforcements are arranged in the poured concrete layer. The wind turbine foundation constructed through the construction method disclosed by the invention is capable of adjusting residual deformation such as differential settlement and inclination occurring in a goaf below, and high in pertinence, thereby greatly improving the self-stabilizationcapacity of the foundation.

Description

technical field [0001] The invention relates to a deformation-resistant and deflection-rectifying foundation suitable for wind turbines in goaf sites and a construction method thereof, belonging to the technical field of wind turbine foundations. Background technique [0002] my country is rich in coal resources. In the past few decades, the huge annual coal output during the development of old energy sources has also made the area of ​​ground subsidence caused by coal mining continue to expand. In recent years, with the process of global economic integration, human beings' demand for energy has become more urgent than in the past, and the intensification of the greenhouse effect has made the development of green and sustainable energy also put on the agenda of various countries. With the rapid rise of the wind power industry, the disadvantages of onshore wind power occupying valuable land resources are becoming increasingly apparent. [0003] Land suitable for large-scale ...

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Problems solved by technology

[0005] The utility model patent with the publication number CN203247598U provides a goaf anti-deformation building foundation. In the technical solution proposed, only cement mortar is used as the cushion layer to interface with the crushed stone layer, and the concept of the crushed stone layer is not clear. It is difficult to ensure the anti-deformation effect of the upper foundation, and correction measures cannot be taken to remedy the deformation of the foundation

The invention patent with the publication number CN104164888A provides a concrete anti-deformation foundation for UHV transmission towers in coal mine mining areas. This technical solution only sets the sliding layer between the concrete layered slabs. Large residual deformation of the foundation in the area, when the plate body is unevenly settled and broken, the viscous sliding layer loses its effect, and when the foundation tilts, the foundation also cannot be rectified and the superstructure can be remedied

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