Combined offshore wind power foundation with duct piles and a bucket

Abstract

The present disclosure discloses a combined offshore wind power foundation with duct piles and a bucket, which comprises duct piles and a bucket foundation; the bucket foundation includes a steel bucket skirt, a bucket top cover, main beams, ring beam and a transition section. A top of the steel bucket skirt and the bucket top cover are integrally formed into a semi-closed structure. The bucket top cover is provided thereon with main beams uniformly arranged in a circumferential direction. The ring beam are arranged at an edge of the bucket top cover. Each duct pile includes a duct, a steel pile, duct supports and high-strength mortar, each main beam is provided at its outer side end with one of corresponding. The duct support is connected with the main beam and the ring beam, and integrated with the bucket top cover, the main beams and the ring beam.

Claims

1. A combined offshore wind power foundation with duct piles and a bucket, comprising two parts, duct piles and a bucket-shaped foundation, the part of the bucket-shaped foundation comprises a steel bucket skirt, a bucket top cover, main beams, a ring beam and a transition section, wherein a top of the steel bucket skirt and the bucket top cover are integrally formed into a semi-closed structure with an opening facing downwardly, the bucket top cover is provided thereon with 3 to 24 main beams uniformly arranged in a circumferential direction, the ring beam are arranged around an edge of the bucket top cover, and the transition section is arranged in a middle of an upper surface of the bucket top cover; each duct pile includes a duct, a steel pile, duct supports and high-strength mortar, each main beam is provided at its outer side end with one of corresponding 3 to 24 ducts, and an axis of the duct forms an angle of 0 to 15 with respect to a vertical direction, a lower end opening of the duct is flush with a lower surface of the bucket top cover, and the lower end opening of the duct is located at an outer side of the steel bucket skirt; the steel pile is arranged in the duct and is integrally connected with the duct through the high-strength mortar, the duct support is arranged on an outer side of the duct and connected with the main beam and the ring beam.

2. The combined offshore wind power foundation with duct piles and a bucket of claim 1, wherein the bucket top cover, the main beams, the transition section and the ring beam all are structures of reinforced concrete and are all poured together into one piece.

3. The combined offshore wind power foundation with duct piles and a bucket of claim 1, wherein the transition section is a hollow circular truncated cone structure.

4. The combined offshore wind power foundation with duct piles and a bucket of claim 1, wherein the ducts and the duct supports are all steel structures.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

(1) FIG. 1 is a schematic front view of a wind power foundation of the present disclosure.

(2) FIG. 2 is a schematic top view of the wind power foundation of the present disclosure.

(3) List of Reference Numerals: 1steel bucket skirt, 2bucket top cover, 3main beam, 4transition section, 5duct support, 6steel pile, 7duct, 8high-strength mortar and 9ring beam.

DETAILED DESCRIPTION OF THE EMBODIMENTS

(4) The present disclosure is described in further details below with reference to the figures and the specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the present disclosure and do not limit the present disclosure.

(5) As shown in FIGS. 1 and 2, the present disclosure relates to a combined offshore wind power foundation with duct piles and a bucket, which includes two parts, i.e., duct piles and a bucket-shaped foundation. The bucket foundation part includes a steel bucket skirt 1, a bucket top cover 2, main beams 3, a ring beam 9 and a transition section 4.

(6) The steel bucket skirt 1 and the bucket top cover 2 are together formed into a semi-closed structure with an opening facing downwardly. The bucket top cover 2 is structure of a reinforced concrete, the steel bucket skirt 1 has an upper part extending into the bucket top cover 2, and the both form an integrated structure. The steel bucket skirt 1 has a wall thickness of 20 mm, a diameter of 32 m, and a height of 10 m; and the bucket top cover 2 has a diameter of 30 m, and a thickness of 40 cm.

(7) The bucket top cover 2 is provided with 6 main beams 3 uniformly arranged in the circumferential direction, wherein each main beam is arranged in the radial direction, and the ring beam 9 arranged around an edge of the bucket top cover 2. The main beams 3 and the ring beam 9 are structures of reinforced concrete and are integrally poured with the bucket top cover 2. The main beam 3 has a height of 1 m, and a width of 0.6 m, and the ring beam 9 has a height of 1 m, and a width of 0.4 m.

(8) The transition section 4 is arranged at a center of the bucket top cover, is a thin-wall circular truncated cone structure of reinforced concrete, and is integrally poured with the bucket top cover 2 and the main beams 3. The transition section 4 has a wall thickness of 0.5 m, a height of 20 m, a center circle with a diameter of 20 m which is located at a bottom surface of the transition section and at the middle between an outer circumferential wall and an inner circumferential wall, and a center circle with a diameter of 8 m which is located at a top surface of the transition section and at the middle between an outer circumferential wall and an inner circumferential wall.

(9) The duct pile part includes ducts 7, steel piles 6, duct supports 5 and high-strength mortar 8.

(10) The main beams are provided at their outer side end with 6 ducts 7, and an axis of each duct 7 and a vertical direction forms an angle of 5 toward the outer side in a radial plane of the bucket top cover 2. That is, the axis of the duct 7 is coplanar with the vertical axis through a center of the top cover 2, and an angle between both is 5. A lower end opening of the duct 7 is flush with the a lower surface of the bucket top cover, the lower end opening of the duct 7 is located at the outer side of the steel bucket skirt 1, and the duct 7 has a wall thickness of 40 mm, and a height of 4 m.

(11) The duct support 5 is arranged at an outside of the duct 7, the duct 7 and the duct support 5 are steel structures and are integrally connected with the main beam 3, the bucket top cover 2 and the ring beam 9 through embedded parts. The duct support 5 has a wall thickness of 30 mm.

(12) The duct 7 is provided with a steel pile 6 therein, and the steel piles 6 and the duct 7 are integrally connected through high-strength mortar 8. The steel pile 6 has a length of 30 m, and a wall thickness of 50 mm.

(13) The installation scheme is as follows: (1) transporting the bucket-shaped foundation part and the duct piles part (without the steel piles 6) to an installation site, and inserting the bucket skirt of the bucket into a seabed foundation by means of pumping water or air; (2) driving the steel piles 6 into the seabed foundation through the ducts 7, and pouring the high-strength mortar 8 into a gap between the ducts 7 and the steel piles 6 to complete the installation of the whole foundation structure.

(14) The present disclosure is not limited to the embodiments described above. The foregoing description of the specific embodiments is intended to describe and illustrate the technical solutions of the present disclosure, and the specific embodiments described above are merely illustrative and not limitative. Those skilled in the art can make various changes in form and details which all fall within the scope of the present disclosure, in light of the disclosures herein without departing from the spirit and scope of the present disclosure as defined by the appended claims.