CN210104782U

CN210104782U - Novel offshore wind power combined pile structure

Info

Publication number: CN210104782U
Application number: CN201920351714.5U
Authority: CN
Inventors: 罗承浩; 邱维衍; 邱建伟; 许万洪; 邱育炬; 许万强; 郑添寿; 张强
Original assignee: FUJIAN YONGQIANG GEOTECHNICAL Co Ltd
Current assignee: FUJIAN YONGQIANG GEOTECHNICAL Co Ltd
Priority date: 2018-06-14
Filing date: 2019-03-20
Publication date: 2020-02-21
Anticipated expiration: 2029-03-20
Also published as: CN109267581A

Abstract

The utility model provides a novel marine wind power composite pile structure, through optimizing the structure of traditional major diameter single pile and assisting supporting construction process, make this kind of composite pile structure, can sink to seabed soil layer under the dead weight effect, sink to the basement rock face after from soil layer under the pile hammer effect of driving, just can be in the little stake on this kind of composite pile drilling and rock-socketed through common minor diameter rock-socketed rig on the market, put into the steel reinforcement cage and pour the concrete, form firm whole with the major diameter stake, compromise the cost, the stability of pile foundation is compromise again to efficiency, reach the requirement of owner's side.

Description

Novel offshore wind power combined pile structure

Technical Field

The utility model relates to a civil engineering construction field, in particular to marine pile foundation construction field, a novel marine wind power combination pile structure specifically says so.

Background

At present, offshore wind power becomes a research hotspot of global wind power development, offshore wind power is taken as an important direction of renewable energy development in all countries of the world, and China also classifies offshore wind power as an important component of a strategic emerging industry. The coastal areas of the east of China are developed economically, lack of conventional energy, high in environmental protection requirement and huge in clean energy demand, and the coastal areas of the east of China are superior in congenital conditions, rich in offshore wind energy resources, good in construction conditions and thick in industrial foundation, and have good conditions for developing and constructing offshore wind power. The offshore wind power generation has the advantages that: the offshore wind energy resource storage capacity is large, the offshore wind energy resource storage capacity is stable, the sea surface roughness is small, the offshore wind turbulence intensity is small, the wind trimming is small, the development efficiency is high, the problems of noise interference, landscape damage and other environmental pollution do not exist, and the offshore wind energy resource storage capacity is very suitable for large-scale development.

The construction of the wind turbine foundation is a precondition for developing offshore wind power, and the structural type of the wind turbine foundation of the offshore wind power plant can be divided into a gravity type foundation, a single pile foundation, a multi-pile foundation, a suction type foundation and the like. The structure selection of the wind turbine foundation needs comprehensive analysis and comparison in the aspects of foundation structure characteristics, natural geological conditions, offshore construction technology, experience and economy.

The single pile foundation generally refers to a single steel pipe pile foundation, and has the structural characteristics of convenient and quick construction and good economical efficiency; the single pile foundation is composed of a steel pipe pile, and the embedding depth of the single pile foundation is determined by water depth and geological conditions. The single-pile foundation is widely applied abroad due to low cost and convenient construction, and the proportion of the single-pile foundation adopted in Europe is up to more than 70%. Along with the large-scale development of domestic offshore wind power, the single machine capacity of a wind turbine is larger and larger, 5MW and above units are successfully researched and developed and put into use, a single pile foundation is developed to be larger in diameter and deeper in length, the characteristics of thin covering layer and high bedrock strength and burying depth are presented for coastal seabed geology of parts of Fujian, Guangdong and the like, a pile foundation is required to be embedded with rock for meeting foundation requirements, and for (ultra) large-diameter single piles, the existing ultra-large-diameter rock-embedding drilling machine is lack of equipment, large-diameter full-section rock embedding is difficult to realize, and the equipment becomes a technical bottleneck for hindering the development of the ultra-large-diameter single piles.

Disclosure of Invention

The utility model aims at overcoming the above-mentioned problem, a novel marine wind power composite pile structure is provided, structure through optimizing traditional major diameter single pile is assisted with supporting construction process, make this kind of composite pile structure, can sink to the basement rock face at whole composite pile from the sea bed surface after, can be through driling in a plurality of small piles that major diameter single pile border distributes, place the steel reinforcement cage, thereby pour in the concrete embedding basement rock layer, make composite pile overall structure firm, both compromise the cost, compromise the stability of pile foundation again in efficiency, reach the requirement of owner's side.

The utility model provides a following technical scheme that above-mentioned technical problem adopted:

a novel offshore wind power combination pile structure, it includes: major diameter single pile (1) and a plurality of minor diameter single pile (2), its characterized in that: a plurality of small-diameter single piles (2) are integrally formed along the pile body of the large-diameter single pile (1), and the small-diameter single piles (2) are evenly distributed on the edge of the large-diameter single pile (1).

Preferably, the large-diameter monopile (1) generally refers to a monopile which is larger than or equal to 6000mm until now, and the small-diameter monopile (2) has a diameter of less than or equal to 800 mm.

Preferably, the number of the small-diameter single piles (2) is 6, and the small-diameter single piles are uniformly distributed on the edge of the large-diameter single pile (1).

Preferably, when the number of the small-diameter single piles (2) is 6, an inner angle formed by the circle centers of two adjacent small-diameter single piles (2) to the circle center of the large-diameter single pile (1) is 60 degrees. Such a structure is the most robust.

Aiming at geological conditions in the background technology, in construction, the combined pile structure is easy to settle and partially enters a bedrock surface, holes are drilled and embedded in a plurality of small-diameter single piles distributed on the periphery of the large-diameter single pile, a reinforcement cage is placed, concrete is poured, and the small-diameter single pile is easily embedded in the bedrock layer.

During the piling process: although the combined pile not only increases the area of the pile end but also increases the area of the pile side compared with a large-diameter single pile, in the process of pile sinking of a covering soil layer, the resistance of the pile end and the friction resistance of the pile side are increased, but the problem of resistance increased in the soil layer can be solved by selecting a pile hammer with larger pile driving force, the combined pile easily enters the soil layer until the surface of a foundation rock under the action of the pile hammer, then, a small-diameter rock-socketed drilling machine which is common in the market can drill holes in small piles on the combined pile to socketed rock, a steel reinforcement cage is placed in the combined pile, concrete is poured to form a firm whole with the large-diameter pile, and the bearing capacity and the stability can meet the requirements.

The utility model has the advantages that:

the utility model provides a novel marine wind power composite pile structure, structure through optimizing traditional major diameter single pile is assisted with supporting construction technology, make this kind of composite pile structure, can be after whole composite pile subsides soil layer, this kind of composite pile gets into soil layer until the basement rock face easily under the pile hammer effect of driving, then just can be at the little stake on this kind of composite pile internal drilling rock-socketed through common minor diameter rock-socketed rig on the market, put into the steel reinforcement cage and pour the concrete, form firm whole with the major diameter stake, both compromise the cost, the efficiency is compromise the stability of pile foundation again, reach the requirement of owner side.

Drawings

The invention will be further explained with reference to the drawings and the embodiments:

FIG. 1 is a schematic top-view cross-sectional view of a novel offshore wind power combination pile structure of the present invention,

fig. 2 is an isometric structural schematic diagram of a novel offshore wind power combined pile structure of the present invention;

fig. 3 is the structural schematic diagram of the novel offshore wind power combined pile structure with unequal length states.

Detailed Description

The following describes a novel offshore wind power combination pile structure according to the present invention with reference to the accompanying drawings and specific embodiments.

The above-mentioned embodiments are only one of the preferred embodiments of the present invention, and the general changes and substitutions performed by those skilled in the art within the technical scope of the present invention should be included in the protection scope of the present invention.

Claims

1. A novel offshore wind power combination pile structure, it includes: major diameter single pile (1) and a plurality of minor diameter single pile (2), its characterized in that: a plurality of small-diameter single piles (2) are integrally formed along the pile body of the large-diameter single pile (1), and the small-diameter single piles (2) are evenly distributed on the edge of the large-diameter single pile (1).

2. The novel offshore wind power combination pile structure of claim 1, characterized in that: the large-diameter single pile (1) generally refers to a single pile which is larger than or equal to 6000mm till now, and the diameter of the small-diameter single pile (2) is smaller than or equal to 800 mm.

3. The novel offshore wind power combination pile structure of claim 1, characterized in that: the number of the small-diameter single piles (2) is 6, and the small-diameter single piles are uniformly distributed on the edge of the large-diameter single pile (1).

4. The novel offshore wind power combination pile structure of claim 1, characterized in that: when the number of the small-diameter single piles (2) is 6, the inner angle formed from the circle center of two adjacent small-diameter single piles (2) to the circle center of the large-diameter single pile (1) is 60 degrees.