CN112283043A

CN112283043A - Construction method of deep open sea Spar column type platform fan

Info

Publication number: CN112283043A
Application number: CN202010921581.8A
Authority: CN
Inventors: 张成芹; 黄艳红; 王俊杰; 刘璐; 张晨天
Original assignee: Cccc Third Harbor Engineering Shanghai New Energy Engineering Co ltd; CCCC Third Harbor Engineering Co Ltd
Current assignee: Cccc Third Harbor Engineering Shanghai New Energy Engineering Co ltd; CCCC Third Harbor Engineering Co Ltd
Priority date: 2020-09-04
Filing date: 2020-09-04
Publication date: 2021-01-29
Anticipated expiration: 2040-09-04
Also published as: CN112283043B

Abstract

The invention discloses a construction method of a deep and offshore Spar column type platform fan, which mainly comprises the following steps that a column type platform (SPAR) is discharged into the water, wet towing and floating transportation is adopted, the column type platform (SPAR) is transported to a corresponding installation position on the sea, the column type platform (SPAR) is automatically ballasted and righted, then the column type platform (SPAR) is connected with an anchoring foundation by a mooring system, the fan is integrally assembled on the shore and transported to the sea, and finally the fan is integrally hoisted. The construction method of the deep and open sea Spar column type platform fan provided by the invention adopts a column type platform (SPAR) floating transportation, a column type platform (SPAR) self-righting process and an offshore fan integral installation construction process, so that the investment of a large-scale transportation barge is reduced, the construction cost is reduced, the problems of high integral righting difficulty and low safety of the traditional column type platform (SPAR) and the fan are solved, the offshore construction operation time is shortened, and the problem of short offshore construction operation window period is solved.

Description

Construction method of deep open sea Spar column type platform fan

Technical Field

The invention relates to the technical field of offshore wind power generation, in particular to a construction method of a far and deep sea Spar column type platform fan.

Background

80% of offshore wind energy resources are located in sea areas with water depth exceeding 60m, the wind energy resources in deep and far sea areas are richer, and the wind speed is more stable. As offshore wind power development is gradually saturated, offshore wind power development gradually goes from offshore to deep open sea. At present, three basic forms of mature floating wind power development are SEMI-submersible (SEMI-SUB), column (SPAR) and Tension Leg (TLP). The column type fan has a structure shown in figure 1, is relatively simple in structure, suitable for streamlined manufacturing, good in stability, free of active ballast equipment and wide in application prospect in the deep and open sea field.

The construction method of the foreign column type fan mainly comprises two methods, one is that a column type platform (SPAR)2 is firstly wet-towed to the site, after ballast centralization is adjusted, the column type platform (SPAR)2 is connected with an anchoring foundation 4 by adopting a mooring system 3, and then the offshore fan 1 is installed in a split manner; the other method is that adopted in the Japanese Hua island project, as shown in figure 2, firstly the integral installation of the fan 1 is realized on the shore, then the fan is transported to the offshore installation site by a barge 7 (the fan 1 and a column platform (SPAR)2 are integrally inclined and placed on the barge), the floating crane 5 and the installation guide frame 6 are adopted in the installation process to assist the straightening of the fan, and finally the mooring system 3 is connected with the anchoring foundation 4.

By adopting the two construction methods, the defects are that: the integral dumping and transportation of the fan and the platform main body requires a large barge, the transportation cost is high, and no related transportation experience exists in China; the second defect is that: the offshore wind turbine integral righting construction operation is difficult to operate and low in safety.

Therefore, the problem that the technical personnel in the field need to solve urgently is to provide a safe and reliable construction method of a column platform (SPAR) fan with simple construction

Disclosure of Invention

Aiming at the problems of high equipment, high cost investment, large operation difficulty and low safety existing in the construction process of the existing column platform (SPAR) fan, the invention provides a construction method of a far and far sea SPAR column platform fan.

In order to achieve the purpose, the invention provides a construction method of a far-sea Spar column type platform fan, which mainly comprises the following construction process flows:

(1) the construction and assembly of the post platform (SPAR) wharf are implemented by firstly building the post platform (SPAR) in sections and then integrally assembling the sections after the construction of the sections is completed.

(2) The method comprises the following steps that a column type platform (SPAR) is launched, the assembled column type platform (SPAR) is transported to a wharf, a semi-submersible barge and a self-propelled hydraulic flat car are adopted to transport the column type platform (SPAR) to a ship, after the semi-submersible barge transports the column type platform (SPAR) to a proper water depth sea area, the semi-submersible barge is launched, the column type platform (SPAR) floats, a tugboat is adopted to pull the column type platform (SPAR) to separate the semi-submersible barge, and the column type platform (SPAR) is launched.

(3) The vertical column platform (SPAR) is wet-towed and transported to a corresponding installation position on the sea by adopting a towing wheel.

(4) The column platform (SPAR) is self-righting, and the column platform (SPAR) is self-ballasted to form a righting restoring moment, so that the column platform (SPAR) is self-righting.

(5) The construction of a mooring system and an anchoring foundation is carried out, before a column platform (SPAR) is in place, the construction of the mooring system and the anchoring foundation is carried out, then one end of the mooring system is connected with the anchoring foundation, and the other end of the mooring system is connected with a buoy to float on the water surface.

(6) The mooring system is connected with the SPAR platform main body, and after the column platform (SPAR) is righted in place by self, the end head of the mooring system floating on the water surface is connected with the column platform (SPAR).

(7) And (4) integrally installing the fan, after the fan is assembled, towing the whole fan by using a towing wheel to transport the whole fan to a corresponding offshore installation machine position, and finally integrally hoisting and installing the fan by using an integral hoisting ship.

Furthermore, the vertical column platform (SPAR) wharf is built and assembled in a flat ground horizontal folding mode.

Furthermore, the semi-submersible barge can be used for front-back left-right load adjustment, so that the deck surface of the semi-submersible barge is kept flush with the wharf plane.

Further, the self-propelled hydraulic flat car can be withdrawn after the completion of loading the platform on the column platform (SPAR).

Further, the anchoring base can be a suction anchor, a high holding power marine anchor or a pile anchor.

The construction method of the deep and open sea Spar column type platform fan provided by the invention adopts a column type platform (SPAR) floating transportation mode, thereby reducing the investment of large transportation barges and lowering the construction cost.

The construction method of the deep and open sea Spar vertical column type platform fan, provided by the invention, adopts a vertical column type platform (SPAR) self-righting process, and solves the problems that the traditional vertical column type platform (SPAR) and the fan are difficult to right integrally and low in safety, or the traditional Spar platform needs a crane ship to assist in righting.

The construction method of the deep and far sea Spar column type platform fan, provided by the invention, adopts the integral installation construction process of the floating foundation offshore fan to replace the split installation process of the traditional floating foundation offshore fan, reduces the offshore construction operation time, and solves the problem of short window period of offshore construction operation.

Drawings

The invention is further described below in conjunction with the appended drawings and the detailed description.

FIG. 1 is a schematic structural view of a Spar column type fan in the prior art;

FIG. 2 is a schematic view of an integral straightening structure of a fan in a conventional Kaso-island project in Japan;

FIG. 3 is a schematic process flow diagram of a construction method of the deep open sea Spar column type platform fan in the embodiment;

FIG. 4a is a schematic structural diagram of a column platform (SPAR) before launching the column platform (SPAR) and a semi-submersible barge in the present example;

FIG. 4b is a schematic diagram of the structure of the column platform (SPAR) rolling on the ship by using a self-propelled hydraulic flat car in the present example;

FIG. 4c is a schematic view of the structure of the column platform (SPAR) in this example, which is completed by rolling on and off the ship using a self-propelled hydraulic flat car;

FIG. 4d is the schematic structural diagram of the column platform (SPAR) in this example after the platform is rolled on the ship by using the self-propelled hydraulic flat car and the ship is returned;

FIG. 4e is a schematic view of the semi-submersible barge submerging and the column platform (SPAR) floating in this example;

FIG. 4f is a schematic view of the structure of the column platform (SPAR) in this example after completion of launching;

FIG. 5 is a schematic structural view of the column platform (SPAR) wet towing floating in this example;

FIG. 6 is a schematic structural view of the self-righting of the SPAR Platform (SPAR) in this example;

FIG. 7 is a schematic structural diagram of the construction of the column platform (SPAR) platform in this example;

FIG. 8 is a schematic structural view of the overall transportation of the fan in this example;

fig. 9 is a schematic structural view of the overall installation of the blower in this example.

The reference numbers in the figures mean:

the device comprises a fan 1, a column platform (SPAR)2, a mooring system 3, an anchoring foundation 4, a floating crane 5, an installation guide frame 6, a barge 7, a semi-submersible barge 8, a wharf 9, a self-propelled hydraulic flat car 10, a tug 11, a whole-machine transportation barge 12, a whole crane ship 13, an A-water surface and a B-seabed surface.

Detailed Description

In order to make the technical means, the creation characteristics, the achievement purposes and the effects of the invention easy to understand, the invention is further explained below by combining the specific drawings.

The invention provides a construction method of a far and deep sea Spar column type platform fan, which comprises the following main construction process flows: the method comprises the steps of firstly launching a column platform (SPAR), carrying out wet towing and floating transportation, transporting the column platform (SPAR) to a corresponding offshore installation position, then automatically ballasting and righting the column platform (SPAR), then connecting the column platform (SPAR) with an anchoring foundation by using a mooring system, integrally assembling and integrally transporting a fan to the offshore, and finally integrally hoisting the fan.

The process flow is described below with reference to specific illustrations.

Referring to fig. 3, a process flow diagram of a construction method of the deep open sea Spar column type platform wind turbine given in this example is shown.

As shown in fig. 3, the main construction process flow comprises: the method comprises the steps of building and assembling a column platform (SPAR) wharf, launching the column platform (SPAR), carrying out wet towing and floating transportation on the column platform (SPAR), self-righting the column platform (SPAR), connecting a mooring system with a SPAR platform main body (anchoring foundation) and integrally installing a fan.

The process flow of the deep open sea Spar column platform fan construction method in the embodiment is specifically described below with reference to the accompanying drawings.

1. Construction assembly of column platform (SPAR) wharf

The construction method provided by the embodiment comprises the steps of reasonably constructing the upright post type platform (SPAR)2 in sections, and integrally assembling the sections after the construction of the sections is completed, wherein the integral assembling adopts a flat and horizontal folding mode.

2. Column platform (SPAR) launching

The following is a detailed description of the implementation of the Stand Platform (SPAR)2 launching in this example.

Referring to fig. 4a, there is shown a schematic structural view of the column platform (SPAR) launching front column platform (SPAR) and semi-submersible barge in this example;

referring to fig. 4b, it shows the structure of the column platform (SPAR) on board the ship by self-propelled hydraulic flat car in this example;

referring to fig. 4c, it shows the structure of the column platform (SPAR) in this example when it is completed to roll on the ship using self-propelled hydraulic flatbed;

referring to fig. 4d, it shows the structure of the column platform (SPAR) after the platform is rolled on the ship by the self-propelled hydraulic flat car and the vehicle is removed;

referring to fig. 4e, which shows the semi-submersible barge submerging in this example, the structure of the column platform (SPAR) floating up;

referring to fig. 4f, a schematic diagram of the structure of the column platform (SPAR) launching completion in this example is shown.

First, as shown in fig. 4a, a column platform (SPAR)2 is picked up from the assembly yard deck and is dropped to the quay; meanwhile, the semi-submerged barge 8 is close to the dock and is submerged until the deck surface is a certain height higher than the plane of the dock 9.

The SPAR Platform (SPAR)2 is then transported from the leading edge of the quay 9 to the semi-submersible barge 8 by rolling on the vessel with self-propelled hydraulic flatbeds 10, as shown in FIG. 4 b.

In the process of loading, as shown in fig. 4c, the semi-submersible barge 8 performs front-back left-right load adjustment according to load adjustment data, so that the deck surface of the semi-submersible barge 8 is kept flush with the plane of the wharf 9, if the deck surface of the ship is lower than the wharf surface and exceeds the allowable suspension travel range, the self-propelled hydraulic flat car 10 stops, the front-back left-right load adjustment is performed, the dual functions of seawater flood tide are combined, when the ship body is lifted to a state capable of loading, the self-propelled hydraulic flat car 10 moves forward again, and the steps are repeated until the self-propelled hydraulic flat car 10 transports the column type platform (SPAR)2 to the ship.

Finally, the self-propelled hydraulic flat car 10 is returned, and after the return is completed, as shown in fig. 4 d.

After the train is withdrawn, as shown in fig. 4e, the semi-submersible barge 8 transports the column platform (SPAR)2 to the sea area with the proper water depth, then the semi-submersible barge 8 submerges, and the column platform (SPAR)2 floats.

As shown in fig. 4f, the tug pulls the column platform (SPAR)2 away from the semi-submerged barge 8, the semi-submerged barge 8 can perform other operations, and the column platform (SPAR)2 is launched.

3. Wet towing floating transportation of column platform (SPAR)

Referring to fig. 5, a schematic diagram of the structure of the column platform (SPAR) wet towing floating in this example is shown.

As shown in fig. 5, after the column platform (SPAR)2 is launched into water, the platform body is horizontally placed, floats in water by the buoyancy of the platform body, and is wet-towed and floated to be transported to a corresponding installation position on the sea by adopting towing wheels 11 meeting towing force requirements and moderate towing speed.

4. Column platform (SPAR) self-righting

Referring to fig. 6, a schematic diagram of the self-righting structure of the SPAR Platform (SPAR) in this example is shown.

As shown in fig. 6, the column platform (SPAR) is self-ballasted, creating a positive restoring moment, which self-centralizes the column platform (SPAR).

5. Mooring system and anchoring foundation construction

Before the column platform (SPAR)2 is in place, the mooring system 3 is constructed.

Firstly, the construction of the anchoring foundation 4 is carried out, and the anchoring foundation 4 can be in the forms of a suction anchor, a high holding power marine anchor, a pile anchor and the like.

Then, one end of the mooring system 3 is connected with the anchoring base 4, and the other end is connected with the buoy and floats on the water surface.

6. The mooring system being connected to a SPAR Platform (SPAR)

Referring to fig. 7, a schematic structural diagram of the construction of the column platform (SPAR) platform in this example is shown.

As shown in fig. 7, the SPAR Platform (SPAR)2 is self-righting into position and the mooring system 3 head floating on the water is connected to the SPAR Platform (SPAR) 2.

7. Integral installation of fan

Referring to fig. 8, it is a schematic structural view of the whole transportation of the fan in this example;

referring to fig. 9, a structural schematic view of the overall installation of the fan in this example is shown.

After the fans 1 are assembled in the onshore fan assembling base, as shown in fig. 8, the whole machine transport barge 12 is dragged by the tug 11 to be transported to a corresponding offshore installation site, and the whole machine transport barge 12 can transport two fans 1 at one time.

Finally, the wind turbine 1 is lifted and installed integrally by the integral crane ship 13 as shown in fig. 9.

The foregoing shows and describes the general principles, essential features, and advantages of the invention. It will be understood by those skilled in the art that the present invention is not limited to the embodiments described above, which are described in the specification and illustrated only to illustrate the principle of the present invention, but that various changes and modifications may be made therein without departing from the spirit and scope of the present invention, which fall within the scope of the invention as claimed. The scope of the invention is defined by the appended claims and equivalents thereof.

Claims

1. A construction method of a deep open sea Spar column type platform fan is characterized by comprising the following main construction process flows:

2. The deep and open sea Spar column platform fan construction method of claim 1, wherein the column platform (SPAR) wharf is built and assembled in a flat and horizontal folding mode.

3. The construction method of the deep and open sea Spar column platform fan as claimed in claim 1, wherein the semi-submersible barge can be adjusted front and back, left and right, and the deck surface of the semi-submersible barge is ensured to be flush with the dock plane.

4. The deep open sea Spar column platform fan construction method of claim 1, wherein the self-propelled hydraulic flat car is retractable after completion of loading on the column platform (SPAR).

5. The method of claim 1, wherein the anchoring foundation is a suction anchor, a high holding power marine anchor or a pile anchor.