阅读说明：本技术 一种海上风电箱型梁连接的多桶组合基础系统 (Multi-barrel combined foundation system connected with offshore wind power box-shaped beams ) 是由 何奔 王淡善 戚海峰 王欢 郇彩云 罗金平 姜贞强 陈法波 李炜 王滨 潘祖兴 于 2019-08-22 设计创作，主要内容包括：本发明公开了一种海上风电箱型梁连接的多桶组合基础系统,其结构包括负压吸力桶、过渡段中心筒和箱型连梁,过渡段中心筒外侧环周等距设置若干箱型连梁,所述每个箱型连梁的下方设置一个负压吸力桶。本发明针对我国复杂海域中不同的水深条件和海床特性,以负压吸力桶三脚架基础为基本设计型式,通过箱型连梁将负压吸力桶和大直径单桩基础进行连接,通过增加预应力拉锚系统提高基础的整体刚度和承载力,在保证工程设计要求的前提下,提供了一种施工便捷和经济低廉的基础系统,可以适用于多种水深和海床条件。(The invention discloses a multi-barrel combined foundation system connected with offshore wind power box-type beams. The invention aims at different water depth conditions and seabed characteristics in complex sea areas in China, takes a negative pressure suction barrel tripod foundation as a basic design form, connects a negative pressure suction barrel with a large-diameter single pile foundation through a box-type connecting beam, improves the integral rigidity and bearing capacity of the foundation by adding a prestressed anchor pulling system, provides a foundation system which is convenient and fast to construct and low in economy on the premise of ensuring engineering design requirements, and can be suitable for various water depth conditions and seabed conditions.)

1. A multi-barrel combined foundation system connected with offshore wind power box-type beams is characterized by comprising a negative pressure suction barrel, a transition section center barrel and box-type connecting beams, wherein a plurality of box-type connecting beams are arranged on the outer side of the transition section center barrel at equal intervals around the circumference, and a negative pressure suction barrel is arranged below each box-type connecting beam.

2. The offshore wind power box girder connection multi-barrel combined foundation system as claimed in claim 1, wherein the box-type connecting girder is internally provided with a connecting girder inner longitudinal partition, a connecting girder inner transverse partition and a connecting girder inner reinforcing rib plate, the connecting girder inner longitudinal partition is vertically arranged along the longitudinal direction of the box-type connecting girder, the connecting girder inner transverse partition is vertically arranged perpendicular to the connecting girder inner longitudinal partition, and the upper edge and the lower edge in the connecting girder are provided with the connecting girder inner reinforcing rib plate.

3. The offshore wind power box girder connection multi-barrel combined foundation system as claimed in claim 1, wherein a top reinforcing plate is arranged between the box connecting beam and the negative pressure suction barrel, the bottom surface of the top reinforcing plate is connected with the top of each negative pressure suction barrel, the top surface of the top reinforcing plate is connected with each box connecting beam, and a through hole matched with the central barrel of the transition section is arranged in the middle of the top reinforcing plate.

4. The offshore wind power box girder connection multi-bucket combined foundation system according to claim 1, wherein the number of the negative pressure suction buckets and the box connecting girders is three.

5. The offshore wind power box girder connection multi-barrel combined foundation system according to claim 3, wherein the edge of the top reinforcing plate between two adjacent box connecting girders is shaped as an inwardly concave arc.

6. The offshore wind power box girder connected multi-bucket combined foundation system of claim 1, wherein the top of the negative pressure bucket is provided with water pumping holes at both sides of the box girder.

7. The offshore wind power box girder connection multi-barrel combined foundation system as claimed in claim 1, wherein the box coupling girder is provided at its distal end with a pre-stressed anchor, one end of the pre-stressed anchor is connected to the distal end of the box coupling girder away from the transition section central cylinder, the other end of the pre-stressed anchor is connected to the transition section central cylinder, and the horizontal projection of the pre-stressed anchor coincides with the center line of the box coupling girder.

8. The offshore wind power box girder connected multi-barrel combined foundation system according to claim 7, wherein the inner wall of the transition section central barrel is provided with at least two annular local transverse reinforcing plates, local longitudinal reinforcing ribs are arranged between adjacent local transverse reinforcing plates, the local longitudinal reinforcing ribs are equidistantly arranged around the inner wall of the transition section central barrel, and the prestressed anchor is connected with the transition section central barrel at a position corresponding to the local longitudinal reinforcing ribs.

9. The offshore wind power box girder connection multi-barrel combined foundation system according to claim 8, wherein a hanging ring is arranged around the outer side of the transition section central cylinder, the height of the hanging ring is between two adjacent local transverse reinforcing plates, and local longitudinal reinforcing ribs are arranged on the inner side of the transition section central cylinder at the corresponding positions of the hanging rings; the top of one end, away from the transition section center cylinder, of each box-type connecting beam is provided with a lock catch, one end of each prestress anchor is connected with the lifting ring, the other end of each prestress anchor is connected with the lock catch, and each prestress anchor is provided with a tension meter.

10. The offshore wind power box girder connection multi-barrel combined foundation system according to claim 1, wherein a single pile is sleeved in the transition section central barrel, a plurality of barrel inner shear keys are arranged on the inner wall of the transition section central barrel along the axial direction of the transition section central barrel, and a barrel inner grouting layer is poured in a space between the transition section central barrel and the single pile.

Technical Field

The invention belongs to the technical field of offshore wind driven generator foundation design related to ocean geotechnics, relates to a multi-barrel combined foundation system connected with offshore wind power box beams in complex sea area conditions, and provides a set of offshore wind power composite foundation system suitable for various water depths and seabed conditions aiming at the offshore complex sea area conditions in China.

Background

Under the large background that global environmental and energy problems are increasingly prominent, new renewable energy sources are favored by countries in the world. Compared with expensive solar power generation and nearly saturated hydropower resources, offshore wind power generation has the advantages of abundant resource reserves, stable power generation, convenient power grid access and the like, so that the development of flying speed is achieved in recent years. By 2018, europe has installed grid-tied 18.5GW offshore wind power, including 4543 wind generators distributed in 11 countries. At present, offshore wind power in China basically has large-scale development conditions, and the construction cost is reduced and the rapid development is realized through technical innovation and large-scale development in the next stage.

However, compared with the uniform dense sandy soil seabed in Europe, offshore wind power construction sea area conditions in China are complex, and the variability of water depth and seabed conditions is large, so that more challenges are provided for the basic design of offshore wind power: in offshore areas of Fujian and Liaoning in China, seabed bedrock is buried shallowly, and the traditional wind power pile foundation needs offshore rock embedding construction, so that the construction period is long, the risk is high, and the manufacturing cost is high; in the offshore area of Zhejiang, the seabed sludge layer is deep, the soil body bearing capacity is low, and the applicability of the offshore large-diameter single-pile foundation is poor; in the offshore area of Guangdong, the water depth is deep, the wave is large, the tide is rapid, and the deformation of the foundation water inlet section under extreme load is very obvious. In addition, the offshore wind power foundation cost can account for about 30% of the investment of the whole project due to the harsh offshore construction conditions. Therefore, the novel, cheap, convenient and reliable offshore wind turbine foundation system which is suitable for the complex sea area of China is provided, and has important engineering and economic significance for offshore wind turbine construction of China.

Disclosure of Invention

The invention aims at different water depth conditions and seabed characteristics in complex sea areas in China, and provides a multi-barrel combined foundation system connected with offshore wind power box-shaped beams, which is suitable for various water depth and seabed conditions in complex sea areas.

In order to achieve the purpose, the invention adopts the following technical scheme:

the invention relates to a multi-barrel combined foundation system connected with offshore wind power box-type beams, which comprises a negative pressure suction barrel, a transition section central barrel and box-type connecting beams, wherein a plurality of box-type connecting beams are arranged on the outer side of the transition section central barrel at equal intervals around the circumference, and a negative pressure suction barrel is arranged below each box-type connecting beam.

Preferably, the box-type coupling beam is internally provided with a coupling beam inner longitudinal partition plate, a coupling beam inner transverse partition plate and a coupling beam inner reinforcing rib plate, the coupling beam inner longitudinal partition plate is vertically arranged along the longitudinal direction of the box-type coupling beam, the coupling beam inner transverse partition plate is vertically arranged perpendicular to the coupling beam inner longitudinal partition plate, and the upper edge and the lower edge in the coupling beam are provided with the coupling beam inner reinforcing rib plate.

Preferably, a top reinforcing plate is arranged between the box-type connecting beam and the negative pressure suction barrel, the bottom surface of the top reinforcing plate is connected with the top of each negative pressure suction barrel, the top surface of the top reinforcing plate is connected with each box-type connecting beam, and the middle of the top reinforcing plate is provided with a through hole matched with the central barrel of the transition section.

Preferably, the number of the negative pressure suction bucket and the box-type connecting beam is three.

Preferably, the edge of the top reinforcing plate between two adjacent box-type connecting beams is shaped into an inward concave arc.

Preferably, water pumping holes are formed in the top of the negative pressure barrel and on two sides of the box-shaped cross beam respectively.

Preferably, the tail end of the box-type connecting beam is provided with a prestressed anchor, one end of the prestressed anchor is connected with the tail end, far away from the central cylinder of the transition section, of the box-type connecting beam, the other end of the prestressed anchor is connected with the central cylinder of the transition section, and the horizontal projection of the prestressed anchor is superposed with the central line of the box-type connecting beam.

Preferably, at least two annular local transverse reinforcing plates are arranged on the inner wall of the central barrel of the transition section, local longitudinal reinforcing ribs are arranged between the adjacent local transverse reinforcing plates, the local longitudinal reinforcing ribs are arranged around the inner wall of the central barrel of the transition section at equal intervals, and the positions of the prestressed anchor bolts connected with the central barrel of the transition section correspond to the local longitudinal reinforcing ribs.

Preferably, a hanging ring is arranged around the outer side of the transition section central cylinder, the height of the hanging ring is positioned between two adjacent local transverse reinforcing plates, and a local longitudinal reinforcing rib plate is arranged on the inner side of the transition section central cylinder at the corresponding position of the hanging ring; the top of one end, far away from the transition section center cylinder, of the box-type connecting beam is provided with a lock catch, one end of the prestress anchor is connected with the hanging ring, the other end of the prestress anchor is connected with the lock catch, and the prestress anchor is provided with a tension meter.

Preferably, a single pile is sleeved in the transition section central cylinder, a plurality of shear keys in the cylinder are arranged on the inner wall of the transition section central cylinder along the axial direction of the transition section central cylinder, and a grouting layer in the cylinder is poured in a space between the transition section central cylinder and the single pile.

The invention combines the common advantages of the negative pressure suction bucket foundation, the prestressed anchor pulling structure and the large-diameter single-pile foundation, takes the negative pressure suction bucket tripod foundation as a basic design form, connects the negative pressure suction bucket with the large-diameter single-pile foundation through the box-type connecting beam, improves the integral rigidity and the bearing capacity of the foundation by increasing the prestressed anchor pulling system, provides a foundation system with convenient construction and low economy on the premise of ensuring the engineering design requirement, and can be suitable for various water depths and seabed conditions. Compare in traditional gravity type basis and pipe frame foundation etc. this novel basis adopts the suction installation, has avoided loaded down with trivial details processes such as design, the welding of complicated node in level and smooth seabed and the pipe frame foundation in the gravity type basis, avoids pile foundation to inlay the rock construction, the marine engineering time that significantly reduces, reduction construction cost.

The invention has the following beneficial effects: (1) the structure is stressed reasonably, and the respective advantages of the negative pressure suction barrel, the steel strand anchor pulling structure and the single pile foundation are fully exerted; (2) the economy is high, and the method is suitable for various water depths and seabed conditions; compare in traditional gravity type basis and jacket basis etc. negative pressure suction bucket foundation adopts the suction installation, has avoided loaded down with trivial details processes such as design, the welding of complicated node in level and smooth seabed and the jacket basis in the gravity type basis, avoids pile foundation embedded rock construction, and the engineering time that significantly reduces improves the economic nature of basis. Meanwhile, the negative pressure suction bucket has an anti-scouring effect on the foundation, so that the anti-scouring protection engineering quantity can be reduced; (3) the construction is convenient, the bucket-group tripod foundation in the patent can be installed by adopting suction and is used as a pile stabilizing device for pile foundation construction, and a pile stabilizing platform is not required to be additionally arranged; (3) the composite foundation formed by the negative pressure suction barrel and the top reinforcing plate in the patent can be recycled through back pressure, so that the engineering cost is greatly reduced, the construction quality is controllable, and the engineering significance is great; (5) structural member sharing between multiple basic form in this patent, the basis can carry out modular design and processing, greatly reduced basis design cost and construction cycle.

Drawings

Fig. 1 is a top view of a first embodiment of the present invention.

Fig. 2 is a side view of a first embodiment of the present invention.

Fig. 3 is a schematic view of an installation process according to a first embodiment of the present invention.

Figure 4 is an isometric view of the box-type coupling beam member of the present invention.

Figure 5 is a top view of the box-type stringer member of the present invention.

Figure 6 is a side view of the box-tie beam assembly of the present invention.

Fig. 7 is a top view of a second embodiment of the present invention.

Fig. 8 is a side view of a second embodiment of the present invention.

Fig. 9 is a schematic view of an installation process according to a second embodiment of the present invention.

Fig. 10 is a structural view of a transition section center tube in the second embodiment of the present invention.

FIG. 11 is a top view of a transition section center barrel in accordance with a second embodiment of the present invention.

Fig. 12 is a detailed view of the connection position of the hanging ring and the transition section central cylinder in the second embodiment of the invention.

Fig. 13 is a top view of a third embodiment of the present invention.

Fig. 14 is a side view of a third embodiment of the present invention.

Fig. 15 is a schematic view of an installation process of the third embodiment of the present invention.

In the figure:

1. a negative pressure suction bucket; 2. a water pumping hole; 3. a top stiffener; 4. a box-shaped connecting beam; 41. connecting the beam inner longitudinal partition plate; 42. a diaphragm plate in the connecting beam; 43. reinforcing rib plates in the connecting beam; 5. a transition section central barrel; 6. a hanging ring; 7. locking; 8. anchor pulling in a prestress way; 9. a tension meter; 10. a local transverse stiffener plate; 11. a local longitudinal reinforcing rib plate; 12. a shear key in the barrel; 13. grouting layer in the cylinder, 14 and single pile.

Detailed Description

The invention is further described with reference to the following figures and detailed description.