Guide pipe frame-cylindrical structure combined offshore wind turbine foundation

A technology for cylindrical foundations and offshore wind turbines, applied in infrastructure engineering, construction, etc., can solve problems such as long construction periods, achieve low cost, convenient construction, and improve the ability to resist bending moments

Active Publication Date: 2014-04-30
THE FRONTIER TECH RES INST OF TIANJIN UNIV
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AI-Extracted Technical Summary

Problems solved by technology

The traditional jacket foundation involves offshor...
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Abstract

A guide pipe frame-cylindrical structure combined offshore wind turbine foundation is composed of a cylindrical foundation part and a guide pipe frame part. The cylindrical foundation part comprises a cylindrical steel wall, a concrete cover plate, a prestressed beam and a connecting beam, wherein the concrete cover plate, the prestressed beam and the connecting beam are connected into a whole in a poured mode. The guide pipe frame part comprises four steel leg columns, steel supporting pipes, connecting cylinders and flanges, wherein the steel leg columns and the connecting cylinders are welded and fixed through the steel supporting pipes respectively, the four steel leg columns are fixed to the middle of the connecting beam 4 of the concrete cover plate, and the connecting cylinders are connected with a wind turbine tower through the flanges. The guide pipe frame-cylindrical structure combined offshore wind turbine foundation has the advantages that a top plate bearing mode is adopted by the guide pipe frame-cylindrical structure of the offshore wind turbine foundation so that the resistance to the bending moment of the whole foundation can be improved remarkably, and the requirement for the bearing capacity of the foundation is lowered; the negative pressure sinking installation mode is adopted, so that the construction speed is high; the whole structure is overall prefabricated and assembled on a shore, floatingly-transported on the sea and installed in a negative pressure sinking mode on the sea, as a result, construction is convenient, efficiency is high, and cost is low.

Application Domain

Foundation engineering

Technology Topic

Bending momentShore +9

Image

  • Guide pipe frame-cylindrical structure combined offshore wind turbine foundation
  • Guide pipe frame-cylindrical structure combined offshore wind turbine foundation

Examples

  • Experimental program(1)

Example Embodiment

[0013] Examples:
[0014] A jacket-tubular structure composite offshore wind turbine foundation, which is composed of a cylindrical foundation part and a jacket part. The cylindrical foundation part includes a cylindrical steel wall 1, a concrete cover plate 2, a prestressed beam 3 and a connecting beam 4. The concrete cover plate 2 is set on the top of the cylindrical steel wall 1, the cylindrical steel wall 1 is embedded in the concrete cover plate 2, the prestressed beams 3 are set on the concrete cover plate 2, and the four prestressed beams 3 are evenly arranged radially, The tie beam 4 is arranged between the two prestressed beams 3 and is evenly arranged in the circumferential direction. The concrete cover plate 2, the prestressed beam 3, and the tie beam 4 are cast and connected as a whole; the jacket part includes steel leg columns 5 and steel supports Tube 6, connecting tube 7 and flange 8, four steel leg columns 5 are evenly arranged vertically or obliquely, the angle between the steel leg columns 5 and the vertical centerline is 0-30°, between the two steel leg columns 5, The steel leg column 5 and the connecting tube 7 are respectively welded and fixed by a steel support tube 6. The top center of the four steel leg columns 5 is provided with a connecting tube 7 and is welded and fixed by the steel support tube 6; the four steel leg columns 5 are fixed to the concrete The middle part of the connecting beam 4 of the cover plate 2; the connecting tube 7 is connected to the wind turbine tower 9 through a flange 8.
[0015] In this embodiment, the diameter of the round steel wall is 30m and the thickness is 20mm; the diameter of the concrete cover is 30.5m and the thickness is 0.3m; the prestressed beam is 0.6m wide and 1m high; the connecting beam is 1.2m wide and 1m high; steel legs The diameter of the column is 0.8m, the thickness is 25mm, and the length is 15m. The angle between the steel leg column and the central axis is 7.125 degrees; the steel support tube has a diameter of 0.5m and a thickness of 15mm; the connecting cylinder has a diameter of 4m, a thickness of 35mm, and a height of 2m.
[0016] Specific construction steps: 1) Prefabricated cylindrical structure and jacket structure; 2) Float the foundation as a whole to the installation site by a special construction vessel; 3) Set the foundation in place by negative pressure, and control the level of the foundation during settlement ; 4) Hoisting the fan tower and fan.

PUM

PropertyMeasurementUnit
Angle0.0 ~ 30.0deg

Description & Claims & Application Information

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