JP5189050B2 - Connecting self-elevating work platform ship and installation method of wind power generation facilities in the open ocean - Google Patents

Description

  The present invention relates to a self-elevating work platform used for installing a wind power generation facility particularly in the open ocean and a method for installing the same.

  Wind power generation using clean and renewable wind energy is promising as a new energy source that is friendly to the global environment under the growing interest in environmental and energy issues. The wind power generation facility can be installed either on land or offshore, but the wind speed on the ocean is stronger than on land, and it has the advantage of a good and stable wind. In addition, there are few obstacles on the ocean, and there is no noise or radio interference. Large-scale power consumption areas are concentrated in the coastal area, and other power system facilities tend to be better in the coastal area. For these reasons, offshore has more favorable conditions for wind power generation than onshore. Offshore wind power generation facilities are adopted in many countries, and are generally installed at a distance of several hundred meters to several kilometers from the coast.

  In offshore wind power generation facilities, for example, in the case of a 2 MW class, a large tower mast with a tower mast height of 80 m and a blade portion diameter of 80 m is used. When installing a wind power generation facility on the ocean, first, after constructing the foundation, an operation of assembling the wind power generation facility composed of a tower mast, a nacelle, and a blade portion on the foundation is performed.

In patent document 1, the installation method of the offshore wind power generation facility which assembles a wind power generation facility on a monopile type foundation is disclosed. FIG. 7 is a flowchart schematically showing each step of the installation method of the offshore wind power generation facility described in Patent Document 1, and FIG. 8 (a) shows the process at the installation site in the installation method of FIG. It is a figure which shows a part, (b) is a schematic plan view of the self-raising type work platform ship 100 shown in (a).
Self-lifting platform (Self Elevating Platform: equipped with a four-legged hydraulic jack-up system), because the floating work platform is unstable for the installation work of wind power facilities on the ocean with waves. Abbreviated as "SEP"). As shown in FIG. 8A, at the installation site, four legs (legs) 121 provided at the four corners of the SEP 100 are fixed to the seabed 80, and the hull is jacked up to the sea higher than the sea level 90. This ensures a stable operation without being affected by waves.

  The installation method of FIG. 7 will be described with reference to FIG. In step S11, it is assumed that the foundation construction has been completed at the installation site. In Patent Document 1, it is basically assumed that a wind power generation facility is installed for each unit. First, one tower mast carrying SEP is jacked up and fixed on the sea near the shore quay, and the assembly members 105a and 105b obtained by dividing one tower mast into a plurality of parts are loaded (step S12). Subsequently, the tower mast transport SEP is towed or self-navigated to the installation site to transport the tower mast assembly member (step S13). When arriving at the installation site, the tower mast transport SEP is jacked up and fixed on the ocean (step S14). Using the crane 123 mounted on the tower mast transport SEP, the tower mast assembly members are sequentially lifted and installed on the foundation 107. Thereby, the installation of the tower mast 105 is completed (step S15).

  After that, once returning to the quay, one windmill carrying SEP (may be the same as the tower mast carrying SEP) is jacked up and fixed on the sea near the land quay, and one windmill assembly member ( Nacelle, hub, blade) are loaded (step S16). Then, using the crane mounted on the windmill carrying SEP, the loaded assembly members are assembled to complete the windmill, and loaded onto the temporary table provided in the windmill carrying SEP (step S17). Subsequently, the wind turbine carrying SEP is towed or self-navigated to the installation site to carry the wind turbine assembly member (step S18). When it arrives at the installation site, the wind turbine carrying SEP is jacked up and fixed on the ocean (step S19). Using a crane mounted on the wind turbine transport SEP, the wind turbine is lifted and installed on the tower mast. Thereby, installation of one wind power generation facility is completed (step S20).

  The dimensions of the conventional SEP used for the installation work of the wind power generation facility are included in the medium category as the SEP. The hull length L shown in FIG. 8B is about 34 to 35 m, the hull width B is about 20 to 22 m, and the hull height is about 3 to 3.5 m. Since the length of the leg 121 is about 38 to 40 m, it can be applied to an installation site having a water depth in the range of several m to about 30 m.

  Patent Document 2 also discloses a construction method for offshore wind power generation facilities. In Patent Document 2, as the offshore wind power generation facility becomes larger, the conventional SEP has become limited in terms of capability, and in order to solve the problem that it is necessary to use a large hoist ship, Instead, it proposes to use a special work ship made of steel plate with legs attached to the four corners of a box-shaped floating dog.

JP 2006-37397 A JP 2004-1750 A

The installation method of the offshore wind power generation facility of Patent Document 1 has no problem in the inland sea relatively close to the land, but has the following problems when installed in the open sea.
(1) In the open ocean, in addition to normal waves with a period of several seconds to 20 seconds, the occurrence frequency of long-period waves with a period of about 60 seconds is high. This long-period wave is known to cause a large shake in the ship even if the wave height is about 10 cm. Long-period waves also exert a large load on SEPs fixed at the installation site. The above-described conventional SEP dimensions have a large influence because the natural period and the period of the long-period wave are close. As a result, work safety may not be ensured. Therefore, the above-mentioned conventional SEP is exclusively an inland sea SEP and is not suitable for use in the open sea.
(2) Since the ocean has a higher wave height than the inland sea, the conventional SEP dimensions described above may not be able to ensure stable navigation due to insufficient resilience when towing or self-propelled. There is.
(3) Although many offshore wind power generation facilities are often installed side by side, the tower mast and wind turbine cannot be transported at the same time with the above-mentioned conventional SEP dimensions. 2 round trips are required. As a result, it takes a considerable amount of work days to install a plurality of devices at a long distance.

  In Europe and the like, there is an example in which a larger SEP than the above-described conventional SEP is used. However, such a large SEP is difficult to use except for work in the open ocean and is not versatile. Since the manufacturing cost of one SEP is extremely high, it is preferable that it can be used for various operations other than installation of a wind power generation facility in the open ocean. Naturally, a large SEP is difficult to use for work in the inland sea, and therefore the range of use is limited. The same applies to the box-type special work boat as in Patent Document 2 in that it is difficult to divert it to other uses.

  In view of the various problems as described above, the present invention provides an SEP suitable for use in installing an offshore wind power generation facility in the open ocean and having versatility, and a method for installing a wind power generation facility in the open ocean using the same. The purpose is to do.

The configuration of the present invention that achieves the above object is as follows. The numbers in parentheses are reference numerals in the drawings described later, and are attached for reference.
A first aspect of the present invention is a connected self-elevating work table for installing a wind power generation facility on the foundation after completing construction of the foundation (7) for the wind power generation facility at an installation site in the open ocean. A main body (2a, 2b) consisting of two coastal self-raising work platform ships of the same size, which are connected to each other and separable from each other in the length direction of the hull (1) ), Two floaters (3a, 3b) attached to the left and right sides so that the entire main body (2a, 2b) is sandwiched from the left and right, and a plurality of assembled tower masts in the hull length direction. A tower mast mounting table (22) that can be juxtaposed and mounted on the main body (2a, 2b), and a crane (23) mounted on the main body (2a, 2b), A plurality of assembled blade parts can be temporarily mounted in a vertically placed state, and a blade part temporary placing table (3) mounted on one of the floaters (3a) 1), a tower mast lifting auxiliary device (34) mounted on the vicinity of the end of the other floater (3b), and the lower surface of each of the two floaters (3a, 3b). And a propulsion device (35).

Said 1st aspect WHEREIN: The hull length of the said connection type self-elevating worktable ship (1) which can mount a tower mast of 60-80m is longer than this tower mast, and is 65-85m. It is preferable to be within the range.
Moreover, it is preferable that the hull width of the connected self-elevating work platform ship (1) is in a range of 27 to 30 m.

A second aspect of the present invention is a method of installing a wind power generation facility on the foundation after completing the construction of the foundation (7) for the wind power generation facility at an installation site in the open ocean, and (A) two ships Of the coastal self-lifting work platform ship in the length direction of each hull is aligned and fixed in a separable manner to form a main body (2a, 2b), and a propulsion device (35) is attached to each lower surface. Place the two floaters on the left and right sides of the main body so that the main body (2a, 2b) is sandwiched from the left and right over the entire length of the hull by two floaters (3a, 3b). After installation, a tower mast mounting table (22) and a crane (23) on which a plurality of assembled tower masts can be juxtaposed in the hull length direction are mounted on the main body (2a, 2b). Then, a blade unit temporary mounting table (31) on which a plurality of assembled blade units can be temporarily mounted in a vertical state is attached to one of the floaters. (3a) and a tower-mast hanging auxiliary device (34) on the vicinity of the end of the other floater (3b). Assembling the work table ship for assembling the carriage (1), (B) fixing the connected self-lifting work table ship (1) to the shore quay and assembling one or more on the tower mast mounting table (22) The tower mast (4a, 4b, 4c) that has already been mounted is mounted, and the blade part temporary placing table (31) is mounted with the same number of assembled blade parts (5) as the tower mast, and the same number of nacelles as the tower mast. (6) a wind power generation facility member loading process for loading, (C) a transporting process for towing or self-propelling the connected self-lifting work platform ship (1) to the installation site, and (D) one wind power the connecting self-elevating work platform vessels (1) the work table and fixed to jack up the ship solid at the installation site of the power generation facilities And (E) suspending one tower mast (4a) placed on the other floater (3b) using the crane (23) and the tower mast lifting auxiliary device (34). The tower mast (4a) is installed on the foundation (7) using the crane (23), and then the nacelle (6) and the blade part (5) are connected to the tower using the crane (23). And a wind power generation facility assembling process to be attached to the mast (4a).

In the second aspect, in the case where a plurality of wind power generation facilities are respectively installed on each of the plurality of foundations (7) at an installation site in the open ocean, After the installation is completed, a propulsion device (35) is connected to the connected self-elevating work platform ship (1) with a tugboat for steering and provided on the lower surface of each of the two floaters (3a, 3b). ) is moved to the installation site of the next wind farm by self propulsion was used to jack up and fixed to the installation site, using said crane (23) following the tower mast (4b, 4c) It is preferable to assemble the next wind power generation facility by moving the tower mast mounting table (22) onto the other floater (3b) and then mounting it, and then repeating the wind power generation facility assembly process. It is.

The connected self-lifting work platform ship according to the present invention, that is, the connected SEP, connects two coastal SEPs in the length direction of the hull, and further attaches two floaters to the left and right side surfaces. It has twice the hull length and a hull width expanded by two floaters than the coastal SEP. As a result, the hull length is particularly difficult to be affected by long-period waves in the open ocean, and work safety can be ensured.
In addition, the connection type SEP can improve safety and availability even when the hull length and the hull width are expanded and the restoring force is enhanced to be suitable for ocean navigation.
In addition, the connected SEP can transport a long, large-diameter tower mast for large wind power generation facilities in an assembled state, eliminating the need to assemble the tower mast at the installation site, and improving work efficiency. improves.
The tower mast lifting assist device enables safe and quick work. The tower mast mounted on the tower mast mounting table on the main body of the carriage is moved up to either the left or right floater and then lifted by the tower mast lifting auxiliary device. In this way, the tower mast lifting assist device is equipped near the end of either the left or right floater, so that it is easy to work.
Furthermore, the tower mast mounting table and the blade unit temporary mounting table mounted on the connection type SEP of the present invention can carry a plurality of tower masts and a plurality of blade units, so that a plurality of wind power generation facilities are installed at the installation site. In this case, the number of reciprocations with the quay can be significantly reduced as compared with the prior art, work efficiency can be increased, and work days can be shortened. Thereby, the construction cost of the offshore wind power generation facility which is increasing in size can be suppressed or reduced.
Moreover, since both the tower mast and the blade part can be transported to the installation site in an assembled state, there is no need to perform assembly work at the installation site. In particular, since it is difficult to perform precise crane work in the open ocean, it is beneficial to be able to reduce crane work at the installation site.

1 is a plan view of a connected self-lifting work platform ship or connected SEP according to the present invention. FIG. It is a side view of the connection type SEP by this invention. It is a rear view of the connection type SEP by this invention. (A)-(d) is a top view explaining the assembly process of connection type | mold SEP1 of this invention. It is the flowchart which showed roughly each process of the installation method of the wind power generation facility in the open ocean using the connection type | mold SEP of this invention. (A) and (b) are figures which show a part of process in the installation field in the installation method of FIG. It is the flowchart which showed each process of the installation method of the offshore wind power generation facility described in patent document 1 roughly. (A) is a figure which shows a part of process in the installation site in the installation method of FIG. 7, (b) is a schematic plan view of SEP for inland sea shown by (a).

Embodiments of the present invention will be described below with reference to the drawings showing examples of the present invention.
FIG. 1 is a plan view of a connected self-elevating work platform ship or a connected SEP (indicated by reference numeral 1) according to the present invention, and FIG. 2 is a side view (a part of the tip of the blade portion is not shown). FIG. 3 is a rear view.

  The coupled SEP 1 according to the present invention shown in FIGS. 1 to 3 is for installing a wind power generation facility at an open ocean installation site. The equipment members transported by the connection type SEP1 are tower masts 4a, 4b, 4c, a blade part 5 (consisting of three blades and a central hub) and a nacelle 6 installed on the foundation.

  The connected SEP1 is a form in which two medium-sized SEPs, that is, coastal SEPs (indicated by reference numerals 2a and 2b) that have been conventionally used for construction of wind power generation facilities are connected. As illustrated in FIG. 8, one coastal SEP has a substantially rectangular planar shape and includes a flat deck. Each coastal SEP 2a, 2b has a hull length L of about 34 to 35 m, a hull width B of about 20 to 22 m, and a hull height of about 3 to 3.5 m. The length of the four legs (legs) 21 passing through the four corners is about 38 to 40 m. Each leg 21 is provided with a lifting device 21a. The elevating device 21a can move the leg 21 up and down relatively with respect to the main body of the boat.

  In the connection type SEP1 shown in FIG. 1, one end located on the left side is a bow and the other end located on the right side is a stern.

  The connection type SEP1 of the present invention forms a carriage main body by connecting and fixing one end of two coastal SEPs 2a, 2b of the same size in the ship body length direction to each other. If the hull length L of the coastal SEPs 2a and 2b is about 34 to 35 m, the hull length 2L of the connection type SEP1 is about 68 to 70 m. In the present invention, the total length of the assembled tower mast can be placed on the connection type SEP1 without protruding from the deck.

  The length of the tower mast of the offshore wind power generation facility is usually in the range of 60 to 80 m, and considering that there are various lengths, the hull length 2L of the connected SEP1 is approximately 65 to 85 m. It is appropriate to be within the range. Moreover, the effect which becomes difficult to receive to the influence of the long-period wave which is easy to generate | occur | produce in the open ocean is obtained by making hull length into such a range. As a result, when the leg 21 is fixed to the seabed and jacked up on the sea, the safety of work can be ensured without causing any unexpected shaking.

  The width B of the main body portion of the coupled SEP1 is the same as the hull width B of the coastal SEPs 2a and 2b, and is about 20 to 22 m.

  Further, two floaters 3a and 3b are respectively attached to the left and right side surfaces so as to sandwich the entire main body of the ship from the left and right. The length of each floater 3a, 3b is the same as the hull length 2L of the main body. The width BF of each floater 3a, 3b is, for example, 3.6 m. Therefore, the hull width of the connection type SEP1 is about 27 to 30 m. In this way, in the connected SEP1, not only the hull length is extended, but also the two floaters 3a and 3b are attached to the side surface to expand the hull width, thereby improving the restoring force and improving the stability in ocean navigation. It can be secured. A propulsion device 35 is provided on the lower surface of each floater 3a, 3b. This propulsion device 35 is used when moving from one installation site to the next when installing a plurality of wind power generation facilities at an open ocean installation site (details will be described later).

  A tower mast mounting table 22 is mounted on the main body of the carrier. In the illustrated example, tower mast mounting tables 22 having a height of about 5 m are provided at four locations along the length of the hull, and three tower masts can be mounted and transported. In FIG. 1, only two tower masts 4 b and 4 c are illustrated on the tower mast mounting table 22. When placing the tower mast, place the base of the tower mast on the bow side and the head of the tower mast on the stern side. In addition to the three that can be mounted on the tower mast mounting table 22, one tower mast (indicated by reference numeral 4a) can be mounted on one floater 3b. Can transport 4 tower masts.

  One crane 23 is equipped in the vicinity of the stern on one side of the main body. Types of cranes include jib cranes or crawler cranes, and those with appropriate performance are mounted as necessary. For example, in the case of a jib crane, a pedestal having a height of about 20 m is installed and mounted thereon.

  Furthermore, on one floater 3a, a blade part temporary placing table 31 is mounted so that a plurality of assembled blade parts (including a central hub here) can be temporarily attached in a vertically placed state. In the example shown in the figure, four blade part temporary placement tables 31 are provided, and four assembled blade parts can be transported. The height of the blade part temporary placing table 31 is, for example, about 20 m. A blade part attachment member 32 that is the same shape as the nacelle 6 and is a lightweight dummy is attached to the upper surface of the blade part temporary placement table 31. In FIG. 1, only one blade part 5 temporarily attached to one blade part temporary placing base 31 located closest to the bow side is illustrated. When the blade portion 5 is temporarily attached to the adjacent blade portion temporary placement table 31, it is attached in the opposite direction (upward in FIG. 1). The same applies to the two blade part temporary placement tables 31 on the stern side. As described above, when the blade portion is mounted in a vertically placed state, there are few portions protruding from the hull, and thus it is safe with respect to the surroundings.

  Furthermore, on the other floater 3b, a tower mast lifting auxiliary device 34 is installed near the stern end. The tower mast lifting auxiliary device 34 is a device for supporting the base portion of the tower mast 4a when the tower mast 4a placed on the floater 3b is lifted by the crane 23.

  In addition, when moving the tower mast 4b, 4c mounted on the tower mast mounting table 22 onto the floater 3b, the base and head of the tower mast 4b, 4c are opposed to each other using the crane 23 (horizontal plane). Within 180 degrees).

  Since each coastal SEP 2a, 2b has four legs 21, there are a total of eight legs 21 in the coupled SEP1.

  In the illustrated example, the tower mast and the blade part that can be transported by the connection type SEP1 are up to four sets. In consideration of the dimension range of the coupled SEP1 of the present invention and the dimensions of an average large-scale wind power generation facility, a maximum of four sets is appropriate. In this case, a maximum of four wind power generation facilities can be installed by one transport. As shown in FIG. 1, it is preferable to load and transport a plurality of nacelles 6 in the empty space of the connection type SEP1 as many as the tower mast and the blade portion. By loading the same number of tower masts, blade parts and nacelles and transporting them to the installation site, a plurality of wind power generation facilities can be installed efficiently.

  For convenience of illustration, only one blade portion 5 is shown in FIGS. 1 to 3 (the same applies to FIG. 6 described later).

  The connection type SEP1 of the present invention is characterized in that two coastal SEPs are connected in order to obtain dimensions suitable for work in the open ocean. However, it can be separated again and returned to the two coastal SEPs for use in other operations. In this way, since two coastal SEPs can be connected or separated as necessary, SEPs with high production costs can be used for various purposes without waste. If an integrated SEP having the same dimensions as the connection type SEP1 of the present invention is manufactured, the manufacturing cost is extremely high, and it is too large to be suitable for work in the inland sea, and is not versatile.

4A to 4D are plan views for explaining the assembly process of the connection type SEP1 of the present invention.
(A) is a plan view on the top and a side view on the bottom (legs are not shown). First, the two coastal SEPs 2a and 2b are floated on the sea, and are guided so that the ends in the length direction of the respective hulls are close to each other. If one end is matched, it will connect temporarily. As shown in the side view, in each coastal SEP 2a, 2b, the bottom surfaces of the end portions of the bows 2a1, 2b1 are cut off. Preferably, the stern 2a2, 2b2 of each coastal SEP2a, 2b is connected. Thereby, the connection type SEP1 can be either bow depending on the outfit.
Subsequently, in (b), the eight legs 21 are fixed to the sea floor, and the two connected coastal SEPs 2a, 2b are jacked up and lifted to the sea. The connecting part of the two coastal SEPs 2a, 2b is fixed using an appropriate fixing tool 25. The fixing tool 25 is a combination of a steel plate material and a bolt, and may be anything as long as it can be firmly fixed. In this way, the carrier body is formed.
Subsequently, in (c), the base boat body is lowered to the sea again, and the pair of floaters 3a and 3b are connected and fixed to the left and right side surfaces of the base boat body so as to sandwich the base boat body from the left and right sides. The fixture is an appropriate one such as a bolt. Four or six ballast chambers 36 are provided inside each of the floaters 3a and 3b. The ballast chamber 36 is used to balance the whole of the connection type SEP1 loaded with equipment members. Further, as shown in FIG. 1, a propulsion device 35 is provided in advance in the recesses on the lower surfaces of the floaters 3a and 3b. The propulsion device 35 includes an impeller and a drive mechanism. For example, there is a “pump / jet propulsion device (trade name)” manufactured by SCHOTEL, Germany, which is imported and sold by Nakashima Propeller Co., Ltd. The propulsion device 35 is operated from an operation room (not shown) on the main body of the carriage and is used for movement in the sea area of the installation site and holding a fixed position.
Furthermore, in (d), various facilities are equipped on the deck and the floater. On the deck of the main body, the tower mast mounting table 22 is installed at an appropriate location. The crane 23 is installed at a position that does not hinder the movement of the tower mast mounted on the tower mast mounting table 22 to the floater 3b. Preferably, the crane 23 is installed in the vicinity of one of the left and right side surfaces on the deck and in the vicinity of either end in the hull length direction. On one floater 3a, a blade part temporary table 31 is attached. On the other floater 3b, a tower mast lifting auxiliary device 34 is installed, and a roller rubber fender 33 is attached to the end. In this way, a connected SEP is completed.

  FIG. 5 is a flowchart schematically showing each step of the method for installing a wind power generation facility in the open ocean using the connected SEP of the present invention. FIGS. 6A and 6B are diagrams showing a part of the process at the installation site in the installation method of FIG.

In step S1, it is assumed that foundation construction has been completed at the installation site. In the installation method according to the present invention, it is possible to transport and install equipment members of a plurality of wind power generation facilities at a time. First, one connected SEP is jacked up and fixed on the sea near the shore quay, and a plurality of assembled tower masts are loaded and placed side by side on the tower mast mounting table. (Step S2).
Subsequently, a plurality of blade part assembly members (one blade and a hub) and a blade part attachment member (dummy nacelle) are loaded on the connection type SEP (step S3).
Subsequently, using a coupled SEP crane, the assembled blade unit assembly members are assembled to complete a plurality of blade units, and the blade unit mounting member is fixed on the blade unit temporary placement table, and then the blade unit mounting is performed. The blade portion is attached to the member (step S4). The necessary number of nacelles are also loaded into the connected SEP.
Next, the connected SEP is lowered to the sea and towed to the installation site or self-navigated to transport equipment members of the wind power generation facility (step S5).
When arriving at the installation site, as shown in FIG. 6 (a), the leg of the coupled SEP is lowered to the seabed 80, and the coupled SEP1 is jacked up from the sea surface 90 and fixed (step S6).
Subsequently, using the crane 23 mounted on the connected SEP 1, one tower mast 4 a is lifted using the tower mast lifting auxiliary device 33, lifted by the crane 23, and the tower mast 4 a on one foundation 7. Is installed (see FIG. 6A). Further, one nacelle 6 is mounted on the tower mast 4a, and one blade portion 5 is mounted on the nacelle 6 (see FIG. 6B). Thereby, the installation of one wind power generation facility is completed (step S7).
Thereafter, the connected SEP1 is lowered to the sea and moved to the installation site of the next wind power generation facility. At this time, a barge for steering is connected to the connection type SEP1, and the propulsion devices 35 and 35 provided on the lower surfaces of the two floaters 3a and 3b are self-propelled to the installation site of the next wind power generation facility. And move. Thereafter, the steps S6 and S7 are repeated to install a plurality of wind power generation facilities (step S8). In this way, it is possible to install a plurality of wind power generation facilities by one transport.

1 Linked self-lifting work platform ship (Linked SEP)
2a, 2b Coastal self elevating work platform ship (coastal SEP)
21 Leg 21a Elevating device 23 Crane 3a, 3b Floater 31 Blade part temporary stand 32 Blade part attachment member (dummy nacelle)
33 Roller rubber fender 34 Tower mast lifting assist device 35 Propulsion device 36 Ballast chamber 4a, 4b, 4c Tower mast 5 Blade section 6 Nacelle 7 Foundation 80 Submarine 90 Sea surface

Claims (5)

A connected self-elevating work platform ship (1) for installing a wind power generation facility on the foundation after completing construction of the foundation (7) for the wind power generation facility at the installation site in the open ocean,
A main body (2a, 2b) consisting of two coastal self-elevating work platform ships of the same size, which are connected and fixed in such a way that one end of each hull length direction is separable,
Two floaters (3a, 3b) attached to the left and right sides so as to sandwich the whole of the main body (2a, 2b) from the left and right;
A tower mast mounting table (22) capable of juxtaposing a plurality of assembled tower masts in the hull length direction and mounted on the base body (2a, 2b),
One crane (23) mounted on the main body (2a, 2b);
A blade part temporary placement table (31) that can be temporarily mounted in a vertically placed state with a plurality of assembled blade parts mounted on one of the floaters (3a),
A tower mast lifting auxiliary device (34) mounted on the vicinity of the end of the other floater (3b),
And a propulsion device (35) provided on the lower surface of each of the two floaters (3a, 3b).   The hull length of the self-elevating work platform ship (1) on which a tower mast with a length of 60 to 80 m can be placed is longer than the tower mast and within a range of 65 to 85 m. The connected self-elevating work platform ship according to claim 1. The connected self-lifting work platform ship according to claim 1 or 2 , wherein the hull width of the connected self-lifting work table ship (1) is in a range of 27 to 30 m. A method of installing a wind power generation facility on the foundation after completing the construction of the foundation (7) for the wind power generation facility at the installation site in the open ocean,
(A) The two shipboard self-lifting work platform ships are connected to each other in the length direction of each ship, and are separably connected and fixed to form the main body (2a, 2b), and propelled to the bottom of each. The two floaters are attached to the base ship so that the main body (2a, 2b) is sandwiched from the left and right over the entire length of the ship by two floaters (3a, 3b) each provided with a device (35). After mounting on the left and right sides of the main body, a tower mast mounting table (22) on which a plurality of assembled tower masts can be juxtaposed in the hull length direction and one crane (23) are connected to the main body (2a, 2b) is mounted on one of the floaters (3a), and a blade unit temporary mounting table (31) on which a plurality of assembled blade units can be temporarily mounted in a vertically mounted state is mounted on the other floater (3a). By suspending a tower mast and raising an auxiliary device (34) on the vicinity of the end of the floater (3b), one connected self-raising And the work barge assembly process of assembling the formula work barge to (1),
(B) The connected self-lifting work platform ship (1) is fixed to the shore quay and one or more assembled tower masts (4a, 4b, 4c) are placed on the tower mast stage (22). And, the blade part temporary placing table (31) is attached with the same number of assembled blade parts (5) as the tower mast, and the wind power generation facility member loading step of loading the same number of nacelles (6) as the tower mast;
(C) a transporting process for towing or self-propelling the connected self-lifting work platform ship (1) to the installation site;
(D) and one work barge fixing step wherein the installation site of the wind power plant connected self-elevating work barge (1) is fixed to jack up,
(E) Suspend one tower mast (4a) placed on the other floater (3b) using the crane (23) and the tower mast suspension auxiliary device (34) (23) is used to install the tower mast (4a) on the foundation (7), and then the crane (23) is used to connect the nacelle (6) and the blade portion (5) to the tower mast (4a). A wind power generation facility assembling process to be attached to the wind power generation facility. In the case of installing a plurality of wind power generation facilities on each of a plurality of foundations (7) at an installation site in the open ocean, and after completing the installation of one wind power generation facility by the wind power generation facility assembly process,
A self-propelled ship using a propulsion device (35) provided on the lower surface of each of the two floaters (3a, 3b) by connecting a barge for steering to the connected self-elevating work platform ship (1) moved to the installation site of the next wind facilities by, it jacked up and fixed to the installation site, following the tower mast (4b, 4c) using the crane (23) of the tower mast mounting table 5. The next wind power generation facility is assembled by repeating the wind power generation facility assembling step after moving from (22) onto the other floater (3 b). To install wind power generation facilities in the open ocean of Japan.

Images