Prefabricated concrete bearing platform with reserved pile nest holes and fabricated multi-pile foundation installation method based on prefabricated concrete bearing platform with reserved pile nest holes

Abstract

The invention provides a prefabricated concrete bearing platform with reserved pile nest holes and a fabricated multi-pile foundation installation method based on the prefabricated concrete bearing platform with the reserved pile nest holes. A foundation ring is poured at the position in the center of the top face of a concrete body of the prefabricated concrete bearing platform, the multiple annularly-arranged reserved pile nest holes are formed in the positions, corresponding to foundation piles, on the bottom face of the concrete body, and the top of each reserved pile nest hole is provided with a grouting hole way penetrating through the top face of the concrete body. By means of the concrete bearing platform is prefabricated on land, a traditional steel jacket box is replaced by the concrete bearing platform, and a jacket box of the concrete bearing platform serves as a concrete formwork and an important bearing structure; the fabricated multi-pile foundation installation method is adopted, compared with a multi-pile foundation construction scheme used in a sea wind turbine generator at present, sea formwork erecting and disassembling working procedures are omitted, and meanwhile a large amount of sea scene reinforcing steel bar binding can be completed in a prefabrication factory on land; the construction efficiency is greatly improved, the sea bearing platform construction time is saved, and meanwhile the construction cost is reduced.

Description

technical field [0001] The invention belongs to the technical field of foundation structures of towering structures in offshore wind power construction projects, and relates to a prefabricated assembled multi-pile foundation and a construction method thereof. Basic structures such as transmission line towers. Background technique [0002] With the vigorous development of clean energy, my country's offshore wind power is about to usher in a large-scale construction climax. Among them, the foundation design technology of offshore wind turbines is a key link in wind power projects. In view of the combined effects of extreme wind speed, waves and other loads and environmental disasters in my country's offshore waters, weak and complex foundations, and limited construction conditions, traditional multi-pile foundations are driven first. However, the construction of the caps is all at sea, requiring waterproof steel casings, steel bar binding, embedded parts, leveling, and large-v...

AI Technical Summary

Problems solved by technology

Among them, the foundation design technology of offshore wind turbines is a key link in wind power projects. In view of the combined effects of extreme wind speed, waves and other loads and environmental disasters in my country's offshore waters, weak and complex foundations, and limited construction conditions, traditional multi-pile foundations are driven first. However, the construction inside the cap is all at sea, requiring waterproof steel casings, steel bar binding, embedded parts, leveling, and pouring large-volume concrete at sea. There are problems such as complex construction process and long period.

Offshore wind power prefabricated multi-pile foundation can reduce offshore operation time, but wind turbines have strict requirements on the flatness of the foundation

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