A prefabricated multi-pile foundation structure and its construction method
A pile foundation and prefabricated technology, applied in the direction of foundation structure engineering, construction, etc., can solve the problems of complex construction process, strict foundation flatness requirements, long cycle, etc., so as to save construction time, save formwork removal procedures, and improve construction efficiency. efficiency effect
Active Publication Date: 2017-01-04
POWERCHINA XIBEI ENG
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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
Method used
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Embodiment Construction
[0056] Figure 1 shows a prefabricated multi-pile foundation structure (also known as a prefabricated concrete cap box), specifically a prefabricated concrete cap with ring holes 5 reserved for pile sockets, including a concrete body 1, which is set on the concrete body The reserved foundation annular hole 2 at the center of the top surface of 1, the reserved pile socket annular hole 5 penetrates the top and bottom surfaces of the concrete body 1 and is located at the edge of the concrete body 1 (that is, near the outer circumference of the axis), and the reserved A plurality of connecting steel beams 6 arranged in the circumferential direction are arranged between the inner and outer ring surfaces of the ring hole 5 of the pile retaining socket. figure 2 It can be seen that the reserved pile socket ring hole 5 between adjacent connecting steel beams 6 forms a reserved pile socket hole 3, and the reserved pile socket hole 3 is arranged at the position corresponding to the pipe p...
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The invention provides an assembled multi-pile foundation structure and a construction method thereof. The assembled multi-pile foundation structure comprises a concrete body, wherein a preserved foundation ring hole is formed in the center of the top surface of the concrete body, and a plurality of preserved pile holes are annularly and uniformly formed in the bottom surface of the concrete body corresponding to pipe piles. A land prefabricated concrete bearing platform (concrete bearing platform pouring jacket) is adopted, the conventional steel pouring jacket is replaced by the concrete bearing platform, and the prefabricated concrete bearing platform pouring jacket is taken as a concrete template as well as an important bearing structure. Compared with the conventional multi-pile foundation construction scheme adopted in offshore wind turbine generators, the assembled multi-pile foundation mounting method has the advantages that offshore form erecting and form stripping procedures are eliminated. Meanwhile, a large amount of offshore field binding of steel bars can be finished in a land prefabrication plant, the construction efficiency is increased greatly, the offshore bearing platform construction time is saved, and 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 construction method of a prefabricated and assembled multi-pile foundation, which is suitable for supporting foundation structures such as wind turbine towers, offshore booster stations, and power 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, re...
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IPC IPC(8): E02D27/42E02D27/44E02D27/14
Inventor 申宽育胡永柱张立英李振作刘蔚田伟辉
Owner POWERCHINA XIBEI ENG