CN210562259U

CN210562259U - Cylindrical side pile type offshore wind power foundation

Info

Publication number: CN210562259U
Application number: CN201921008916.6U
Authority: CN
Inventors: 王海军; 苏媛媛; 练继建
Original assignee: Tianjin University
Current assignee: Tianjin University
Priority date: 2019-07-01
Filing date: 2019-07-01
Publication date: 2020-05-19
Anticipated expiration: 2029-07-01

Abstract

The utility model discloses a cylinder-side pile type offshore wind power foundation, which comprises a cylinder structure and a pile structure; the cylindrical structure consists of a cylindrical skirt, a cylindrical top cover, a subdivision plate, a main beam, a ring beam, a concrete top cover, a support rod and a stiffening rib; the cylinder skirt and the cylinder top cover form a semi-closed cylinder structure with a downward opening; 3-12 main beams are uniformly arranged on the cylinder top cover along the radial direction, and 3-6 ring beams are arranged along the circumferential direction; stiffening ribs are arranged on the main beam and the ring beam, and the cabin dividing plate is arranged in the semi-closed cylindrical structure and is positioned right below the main beam and the ring beam, so that a regular polygon semi-closed structure is formed at the central position in the semi-closed cylindrical structure; 3-12 semi-closed structures are formed on the outer side of the regular polygon semi-closed structure through a partition plate; a concrete top cover is arranged on the cylinder top cover; the pile structure is composed of vertical piles, and 3-12 vertical piles are uniformly arranged at the outer side end of the main beam in the circumferential direction; the lower end of the vertical pile exceeds the cylinder skirt by 5-30 m; the upper end of the vertical pile is flush with the upper end surface of the main beam, and the main beam penetrates through the upper end of the vertical pile to be connected with the vertical pile.

Description

Cylindrical side pile type offshore wind power foundation

Technical Field

The utility model belongs to the technical field of ocean engineering's foundation structure, specifically be relate to an adopt marine wind power basis that barrel-shaped structure and pile structure combination formed.

Background

Wind energy is an important component of renewable energy, and active development of wind energy has profound significance for improving the structure of an energy system, relieving the energy crisis and protecting the ecological environment. As wind power technology gradually extends from onshore to offshore, offshore wind power generation has become a focus in the world field of renewable energy development. Since the beginning of the new century, the offshore wind power development situation in China is rapid, and the offshore wind power development situation gradually becomes an important measure for solving the problems of energy supply and energy safety in China, and offshore wind power generation has entered a rapid development stage.

The offshore wind power foundation structure is in a complex marine environment and is very easy to be affected by disastrous effects of various marine environment loads, so that the safety of the foundation structure is affected. Therefore, selecting different basic forms according to factors such as sea area geology, marine environment and the like becomes an extremely important task in wind power engineering design.

The key of the construction of offshore wind power plants is to innovate the form of the foundation structure and ensure the safety of the wind power foundation structure. The traditional foundation forms include a steel pipe pile foundation, a gravity type foundation, a jacket foundation, a multi-pile cap foundation, a cylindrical foundation, a floating foundation and the like. The construction process of the steel pipe pile foundation and the jacket foundation is complex, large-scale equipment is required for matched transportation and hoisting in transportation and installation, and the cost is high. The gravity type foundation integrally resists the environmental load by the dead weight of the structure and the filler and ballast, thereby maintaining the stable structure. The construction is simple, the cost of the filling material and the ballast material is low, but the requirement on the geology of the foundation is higher.

The cylindrical foundation structure is simple in form, convenient to transport and install, high in bearing capacity, capable of achieving one-step installation, high in anti-sliding stability of the cylindrical skirt and wide in application range. When the large-capacity deep-water fan is used, the diameter of the skirt is continuously increased due to the increase of bending moment load, so that the stress condition of a foundation structure is deteriorated, and the installation difficulty is increased; when the surface layer has a thick silt foundation, the height of the cylinder skirt needs to be larger or the diameter of the cylinder needs to be larger, so that the uneven settlement of the whole foundation can be effectively controlled.

SUMMERY OF THE UTILITY MODEL

The utility model aims at overcoming not enough among the prior art, providing a barrel edge stake formula offshore wind power basis, under the reduction basis construction cost condition, guaranteeing the design deformation requirement of whole fan structure.

The utility model aims at realizing through the following technical scheme:

a cylindrical-edge pile type offshore wind power foundation comprises a cylindrical structure and a pile structure; the cylindrical structure consists of a cylindrical skirt, a cylindrical top cover, a subdivision plate, a main beam, a ring beam, a concrete top cover, a support rod and a stiffening rib; the cylinder skirt and the cylinder top cover form a semi-closed cylinder structure with a downward opening; 3-12 main beams are uniformly arranged on the cylinder top cover along the radial direction, and 3-6 ring beams are arranged along the circumferential direction; the stiffening ribs are arranged on the main beam and the ring beam, the cabin dividing plate is arranged in the semi-closed cylindrical structure and is positioned below the main beam and the ring beam, and the cabin dividing plate enables a regular polygon semi-closed structure consisting of 3-12 sides to be formed at the center position in the semi-closed cylindrical structure; 3-12 semi-closed structures are formed on the outer sides of the vertical sides of the regular polygon semi-closed structures through the compartment plates; the concrete top cover is arranged on the cylinder top cover;

the pile structure is composed of vertical piles, and 3-12 vertical piles are uniformly arranged at the outer side end of the main beam in the circumferential direction; the lower end of the vertical pile exceeds the cylinder skirt by 5-30 m; the upper end of the vertical pile is flush with the upper end surface of the main beam, and the main beam penetrates through the upper end of the vertical pile and is connected with the vertical pile; the vertical pile is intersected with the cylinder skirt, the cylinder top cover and the concrete top cover; the pile body of the vertical pile at the intersection part is not provided with a cylinder skirt, and the pile top of the vertical pile is not provided with a cylinder top cover and a concrete top cover so as to keep the interior of the vertical pile to be communicated up and down.

Furthermore, the main beam and the ring beam are both made of I-shaped steel.

Furthermore, the cylinder skirt, the cylinder top cover, the subdivision plates, the main beams, the ring beams and the stiffening ribs are all steel structures and are connected into a whole through welding; the concrete top cover is poured on the cylinder top cover, and the main beams, the ring beams and the stiffening ribs are embedded in the concrete.

Further, the vertical pile is of a steel tubular structure with two open ends.

Furthermore, the upper end face of the vertical pile is also provided with a support rod which is vertically connected with the main beam, and the support rod is an I-shaped rod piece.

Compared with the prior art, the utility model discloses a beneficial effect that technical scheme brought is:

1. to the stratiform ground that the seabed comprises stickness soil layer or sandy soil layer or silt layer etc. that the seabed is by top layer 10 ~ 20m silt foundation or has certain thickness and higher bearing capacity, the utility model discloses go up the wind-powered electricity generation basis in the stake can insert the soil layer that has higher bearing capacity to show the bearing capacity that improves whole foundation structure and the ability of resistance to deformation. Compared with the wide and shallow type barrel foundation, the diameter of the barrel and the depth of the skirt can be obviously reduced, thereby reducing the manufacturing cost. Especially be above-mentioned stratiform ground to the top layer, thickness about 30 ~ 40m, then be the seabed of rock foundation, the utility model discloses the rock-socketed of traditional pile foundation can be avoided to marine wind power basis to show and reduce marine engineering time, thereby reduce construction cost.

2. The utility model discloses the top of stake is the open-ended in the marine wind power basis, when the basis sinks, if the inside silt of stake can extrude through open-top to avoid the inside soil stopper of formation of stake to restrict foundation structure's whole sinking.

Drawings

Fig. 1 is the three-dimensional structure schematic diagram of the wind power foundation of the utility model.

Fig. 2 is a schematic view of the three-dimensional structure of the wind power foundation of the present invention at the bottom view angle.

Reference numerals: 1-I-steel main beam, 2-I-steel ring beam, 3-concrete top cover, 4-cylindrical top cover, 5-cylindrical skirt, 6-subdivision plate, 7-support rod, 8-stiffening rib and 9-vertical pile

Detailed Description

The present invention will be described in further detail with reference to the following drawings and specific embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and are not intended to limit the invention.

As shown in fig. 1 and fig. 2, the utility model relates to a cylindrical side pile type offshore wind power foundation, which comprises a cylindrical structure and a pile structure. The cylindrical structure consists of a cylindrical skirt 5, a cylindrical top cover 4, a cabin dividing plate 6, an I-shaped steel main beam 1, an I-shaped steel ring beam 2, a concrete top cover 3, a support rod 7 and a stiffening rib 8;

the cylinder skirt 5 and the cylinder top cover 4 form a semi-closed cylinder structure with a downward opening; the height of the cylindrical skirt 5 is 10m, the thickness is 20mm, and the diameter is 30 m; the thickness of the top cover is 10 mm;

6I-steel main beams 1 are uniformly arranged on the upper side of the cylinder top cover 4 along the radial direction, and 4 circles of I-steel ring beams 2 are arranged along the annular direction; stiffening ribs 8 are arranged on the I-shaped steel main beam 1 and the I-shaped steel ring beam 2; the height of the I-shaped steel girder 1 is 50cm, the thickness of the flange plate is 30mm, and the width is 30 cm; the height of the I-shaped steel ring beam 2 is 50cm, the thickness of a flange plate is 20mm, and the width is 20 cm;

the cabin plate 6 is arranged in the semi-closed cylindrical structure, and a 6-side regular polygon semi-closed structure is formed in the center of the semi-closed cylindrical structure; arranging cabin dividing plates 6 on the outer sides of all vertical sides of the regular polygonal semi-closed structure along the radial direction to form 6 semi-closed structures; the radial cabin distribution plate 6 is positioned right below the I-shaped steel girder 1; the thickness of the subdivision plate is 15 mm;

a concrete top cover 3 is arranged on the cylinder top cover 4; the thickness of the concrete is 50 cm;

the cylinder skirt 5, the cylinder top cover 4, the subdivision plate 6, the I-steel main beam 1, the I-steel ring beam 2 and the stiffening ribs 8 are of steel structures and are connected into a whole by welding; the concrete top cover 3 is poured on the cylinder top cover 4, and the I-shaped steel main beam 1, the I-shaped steel ring beam 2 and the stiffening ribs 8 are embedded in the concrete.

In the pile structure, the vertical piles 9 are steel tubular structures with openings at two ends, 6 vertical piles are uniformly arranged at the outer side end of the I-shaped steel main beam 1 along the circumferential direction of the cylindrical skirt 5, and the diameter of each vertical pile is 3 m; the lower end of the vertical pile 9 exceeds the height of the cylinder skirt 5 by 10 m; the upper end of the vertical pile 9 is flush with the upper flange of the I-shaped steel main beam 1; the I-shaped steel main beam 1 penetrates through the upper end of the vertical pile 9; the I-shaped steel ring beam 2, the cylindrical skirt 5 and the subdivision plate 6 are disconnected at the position of the vertical pile 9; a support rod 7 is arranged at the upper end of the vertical pile 9 and is vertical to the I-shaped steel main beam 1, and the support rod 7 is an I-shaped rod piece; the vertical pile 9 is intersected with the cylinder skirt 5, the cylinder top cover 4 and the concrete top cover 3; the pile body of the vertical pile 9 at the intersection part is not provided with the cylinder skirt 5, and the pile top of the vertical pile 9 is not provided with the cylinder top cover 4 and the concrete top cover 3 so as to keep the interior of the vertical pile to be communicated up and down.

The vertical pile 9, the cylindrical skirt 5, the I-steel main beam 1, the I-steel ring beam 2, the subdivision plate 6 and the support rod 7 are all of steel structures and are connected into a whole through welding.

The specific construction method of the embodiment is as follows:

(1) firstly, a cylindrical structure, a pile structure and an upper transition section are prefabricated and installed in a land factory.

(2) And after prefabrication of the foundation structure is completed, the foundation structure is transported to a specified installation site through a ship.

(3) Through negative pressure sinking, the whole foundation is sunk into the seabed, and the top cover of the foundation is in close contact with the seabed.

(4) After the foundation construction is completed, an upper fan tower cylinder, a machine head and the like are installed through a floating crane.

The present invention is not limited to the above-described embodiments. The above description of the embodiments is intended to describe and illustrate the technical solutions of the present invention, and the above embodiments are merely illustrative and not restrictive. Without departing from the spirit of the invention and the scope of the appended claims, the person skilled in the art can make many changes in form and detail within the teaching of the invention.

Claims

1. A cylindrical-edge pile type offshore wind power foundation is characterized by comprising a cylindrical structure and a pile structure;

the cylindrical structure consists of a cylindrical skirt, a cylindrical top cover, a subdivision plate, a main beam, a ring beam, a concrete top cover, a support rod and a stiffening rib; the cylinder skirt and the cylinder top cover form a semi-closed cylinder structure with a downward opening; 3-12 main beams are uniformly arranged on the cylinder top cover along the radial direction, and 3-6 ring beams are arranged along the circumferential direction; the stiffening ribs are arranged on the main beam and the ring beam, the cabin dividing plate is arranged in the semi-closed cylindrical structure and is positioned below the main beam and the ring beam, and the cabin dividing plate enables a regular polygon semi-closed structure consisting of 3-12 sides to be formed at the center position in the semi-closed cylindrical structure; 3-12 semi-closed structures are formed on the outer sides of the vertical sides of the regular polygon semi-closed structures through the compartment plates; the concrete top cover is arranged on the cylinder top cover;

the pile structure is composed of vertical piles, and 3-12 vertical piles are uniformly arranged at the outer side end of the main beam in the circumferential direction; the lower end of the vertical pile exceeds the cylinder skirt by 5-30 m; the upper end of the vertical pile is flush with the upper end surface of the main beam, and the main beam penetrates through the upper end of the vertical pile and is connected with the vertical pile; the vertical pile is crossed with the cylinder skirt, the cylinder top cover and the concrete top cover and keeps the interior of the vertical pile to be communicated up and down.

2. The cylindrical-edge pile type offshore wind power foundation of claim 1, wherein the main beams and the ring beams are both made of I-shaped steel.

3. The cylindrical-edge pile type offshore wind power foundation of claim 1, wherein the cylindrical skirt, the cylindrical top cover, the subdivision plates, the main beams, the ring beams and the stiffening ribs are all steel structures and are connected into a whole by welding; the concrete top cover is poured on the cylinder top cover, and the main beams, the ring beams and the stiffening ribs are embedded in the concrete.

4. The spud-in offshore wind turbine foundation of claim 1, wherein the vertical pile is a steel tubular structure open at both ends.

5. The cylindrical-edge pile type offshore wind power foundation of claim 1, wherein the upper end face of the vertical pile is further provided with a support rod vertically connected with the main beam, and the support rod is an I-shaped rod piece.