CN209429159U - Offshore wind farm single-pile foundation - Google Patents

Abstract

The utility model discloses a kind of offshore wind farm single-pile foundations, pile body is inserted into sea bed and fixation, is equipped with reinforcement structure in pile body, reinforcement structure is made of reinforcement bottom plate and floor, reinforce bottom plate to be secured transverse to inside pile body, multiple floors are fixed on vertically to be reinforced connecting on bottom plate and with pile body inner surface.Reinforcement structure is set in the pile body that the utility model passes through wind-power single-pile foundation at sea to increase the intensity at pile body maximal bending moment, the bending strength of pile body is improved using floor, the intensity that offshore wind farm single-pile foundation can be effectively improved reduces the risk that fatigue damage fracture occurs in pile body；And the height of the soil body inside pile body is compressed by reinforcing bottom plate, improves the compactness of the soil body inside pile body, to improve the frictional resistance on the inside of pile body, the bearing capacity for increasing pile body, the embedded depth for reducing basis, basic cost can be reduced.

Description

Offshore wind farm single-pile foundation

Technical field

The utility model relates to offshore wind farm construction technique field more particularly to a kind of offshore wind farm single-pile foundations.

Background technique

Marine wind electric field is important new energy technology, and the design of offshore wind farm crew base and construction are that marine wind electric field is built If one of key technology.

Offshore wind farm crew base cost accounts for about the 20% to 25% of entire offshore wind farm investment, while blower foundation is applied Work progress directly restricts the time of wind power plant power generation.Therefore, basic cost is reduced, marine foundation construction progress is accelerated, Be conducive to improve the economy of entire wind power plant.Single-pile foundation is with Potential Working Time For Operation At Sea is short, it is small to can adapt to construction window Sea area, speed of application is fast, it is simple comparatively fast to realize wind field power generation, structure, is convenient for the advantages that operation phase maintenance.Currently, China is built and is concentrated mainly on the ground such as Jiangsu, Shanghai, Shandong, Fujian and Guangdong in the offshore wind farm project built, except Fujian, extensively Outside eastern part shallow overburden+basement rock sea bed, other regions are based on typical deep covering layer, when the depth of water is less than 30m, single pile Basis is still the preferred foundation pattern of offshore wind farm crew base construction.

Single-pile foundation for offshore wind generation set is long cantilever structure, under the repeated action of wave flow load, be easy to produce compared with Big Cumulative Fatigue Damage, and being continuously increased with offshore wind farm capacity of power unit, in order to adapt to complicated marine hydrology Geology and natural conditions, while needing to meet strict demand of the Fan Equipment normal operation in top to foundation deformation, single pile base again The stake diameter of plinth constantly increases, and reaches as high as 9m.For large diameter steel pipe pile foundation, pile-end soil plug effect is negligible, single pile Under the action of interior outer frictional resistance, the risk that fatigue damage fracture occurs in single pile is increasing.

Utility model content

The technical problem to be solved by the utility model is to provide a kind of intensity height, it is less prone to fatigue damage fracture sea Upper wind-power single-pile foundation.

To solve above-mentioned technical problem the technical scheme adopted by the utility model is offshore wind farm single-pile foundation, including Pile body, the pile body are inserted into sea bed and fixation, are equipped with reinforcement structure in the pile body, and the reinforcement structure is by reinforcement bottom plate and more A floor composition is reinforced bottom plate and is secured transverse to inside pile body, multiple floors be fixed on vertically reinforce on bottom plate and in pile body Surface connection.

Reinforce on bottom plate further, the floor is evenly arranged in a ring.

Further, the floor is triangle floor.

Further, the center for reinforcing bottom plate is equipped with drainage hole.

Further, the aperture size of the drainage hole is the 1/3 of pile body internal diameter.

Further, the distance on the reinforcement bottom plate to sea bed surface is less than 10m.

The beneficial effects of the utility model are: setting adds in the pile body that the utility model passes through wind-power single-pile foundation at sea Strong structure increases the intensity at pile body maximal bending moment, and the bending strength of pile body is improved using floor, can effectively improve sea turn The intensity of electric single-pile foundation reduces the risk that fatigue damage fracture occurs in pile body；And pile body is compressed by reinforcing bottom plate The height of the internal soil body, improves the compactness of the soil body inside pile body, to improve the frictional resistance on the inside of pile body, increase holding for pile body Loading capability, the embedded depth for reducing basis, can reduce basic cost.

Detailed description of the invention

Fig. 1 is the front view of the utility model；

Fig. 2 is the top view of the utility model；

In the figure, it is marked as 1- pile body, 2- sea bed, 3- reinforce bottom plate, 4- floor, 5- drainage hole, the sea level 6-.

Specific embodiment

The utility model is further detailed with reference to the accompanying drawing for the ease of understanding the utility model,.

As shown in Figure 1, the pile body 1 of offshore wind farm single-pile foundation is inserted into sea bed 2, pile body 1 is located at sea bed 2 and sea level 6 Between repeated action of the part by wave flow load, be easy to damage because of excessive fatigue accumulation at the maximal bending moment of pile body 1 Hurt and rupture failure occurs.The utility model is provided in pile body 1 as depicted in figs. 1 and 2 in order to reinforce the intensity of pile body 1 Reinforcement structure, reinforcement structure are made of reinforcement bottom plate 3 and multiple floors 4, are reinforced bottom plate 3 and are secured transverse to inside pile body 1, pass through Reinforce bottom plate 3 to compress soil body height pile body 1 inside, the soil body allowed inside pile body 1 be highly reduced to 2 surface of sea bed with Under, to improve the inside sliding block of pile body 1 by the compactness for improving the 1 inside soil body of pile body, increase holding for single-pile foundation Loading capability can reduce the embedded depth of single-pile foundation with the increase of the bearing capacity of single-pile foundation, thereby reduce pile sinking work The cost of industry time and single-pile foundation.

Floor 4 is fixed on vertically to be reinforced being supported pile body 1 on bottom plate 3 and after connecting with 1 inner surface of pile body, by setting Floor 4 is set to increase the bending stiffness of pile body 1.The quantity of floor 4 is selected according to the internal diameter of pile body 1, and floor 4 is best It is uniformly distributed in a ring on reinforcing bottom plate 3, make between floor 4 and pile body 1 that active force is uniform, is conducive to the raising of intensity, and floor 4 Using triangle floor, stability is higher.

As depicted in figs. 1 and 2, it is equipped with drainage hole 5 at the center for reinforcing bottom plate 3, for reinforcing bottom plate 3 in pile body 1 Soil intracorporal seawater is discharged when portion's soil body is compressed, keeps the degree of packing of the soil body in pile body 1 higher.The aperture size of drainage hole 5 1/3 for 1 internal diameter of pile body is best, and aperture can be prevented excessive and reduce and reinforce bottom plate 3 to the compression degree of the soil body, energy Guarantee that seawater discharge is smooth.

Since the maximal bending moment that existing blower load acts on lower pile body 1 is normally at 2 surface of sea bed or less 10m depth bounds It is interior, therefore the setting depth for reinforcing bottom plate 3 in the utility model is in 2 surface 10m of sea bed, i.e. reinforcement bottom plate 3 arrives sea bed 2 The distance on surface is less than 10m.

Claims (6)

1. offshore wind farm single-pile foundation, including pile body (1), the pile body (1) is inserted into sea bed (2) and fixed, it is characterised in that: institute It states and is equipped with reinforcement structure in pile body (1), the reinforcement structure is made of reinforcement bottom plate (3) and multiple floors (4), reinforces bottom plate (3) it is internal to be secured transverse to pile body (1), multiple floors (4) be fixed on vertically reinforce on bottom plate (3) and with pile body (1) inner surface Connection.

2. offshore wind farm single-pile foundation as described in claim 1, it is characterised in that: the floor (4) is evenly arranged in a ring to be added On strong bottom plate (3).

3. offshore wind farm single-pile foundation as claimed in claim 1 or 2, it is characterised in that: the floor (4) is triangular fin Plate.

4. offshore wind farm single-pile foundation as described in claim 1, it is characterised in that: the center for reinforcing bottom plate (3) is equipped with Drainage hole (5).

5. offshore wind farm single-pile foundation as claimed in claim 4, it is characterised in that: the aperture size of the drainage hole (5) is The 1/3 of pile body (1) internal diameter.

6. offshore wind farm single-pile foundation as described in claim 1, it is characterised in that: the reinforcement bottom plate (3) arrives sea bed (2) table The distance in face is less than 10m.