WO2017217505A1 - Access structure for accessing open-sea structure - Google Patents

Abstract

An access structure (100) for accessing an open-sea structure is provided with a plurality of platforms (21, 22, 23) provided on the external periphery of an open-sea structure (A) and disposed adjacent to each other, and gunwale contact plate parts (3) provided below the platforms (21, 22, 23), the plurality of platforms (21, 22, 23) being at mutually different heights, and the platforms (21, 22, 23) being provided over the circumferential direction of the open-sea structure (A).

Description

Access structure to open ocean structure

The present invention relates to an access structure to an open ocean structure.
This application claims priority based on Japanese Patent Application No. 2016-120774 filed in Japan on June 17, 2016, the contents of which are incorporated herein by reference.

Conventionally, when an operator accesses an offshore structure such as an offshore wind turbine, the ship is transferred from the ship to the offshore structure. Generally, when transferring from a ship to an open-sea structure, the ship reaches a predetermined position of the open-sea structure by going up a ladder provided in the open-sea structure. For example, as described in Patent Document 1 below, a cylindrical connecting body is installed between a ship and an open ocean structure, and an operator passes through the inside of the connected body and is installed on the outer wall of the open ocean structure. I climbed the ladder and arrived at the bridge.

Japanese Unexamined Patent Publication No. 2014-156179

As described in Patent Document 1 above, when a ladder is provided between the bridge and the ship, when the worker enters the ship from the open ocean structure, the worker faces the ladder backward (turns his back to the ship). ) Go down in a posture. There is a problem that it is very difficult to access the ship because the ship and the waves are difficult to see in the backward attitude. Also, in order to ensure safe access to the ship, the wave height limit value that allows you to board the ship in a backward-facing position is low, so depending on the wave height, it is very difficult to board the ship from an open ocean structure. there is a possibility.

Therefore, the present invention has been made in view of the above circumstances, and provides an access structure to an open ocean structure that can be safely accessed by an operator.

In order to achieve the above object, the present invention employs the following means.
That is, an access structure to an open-sea structure according to the present invention includes a plurality of platforms provided on the outer periphery of the open-sea structure and arranged adjacent to each other, and the heights of the multiple platforms are different from each other. And

In the access structure to the open ocean structure configured as described above, the plurality of platforms provided on the outer periphery of the open ocean structure and arranged adjacent to each other have different heights. Therefore, a platform with an appropriate height is selected according to the changing tide level, and the ship is attached to the platform. When moving from a ship to an open ocean structure, workers can access the open ocean structure side (forward), and when entering the ship from an open ocean structure, the workers face the ship side (forward). Since it can be accessed in a posture, it can be accessed safely.

Moreover, in the access structure to the open ocean structure according to the present invention, the plurality of platforms may be provided over the circumferential direction of the open ocean structure.

In the access structure to the open ocean structure configured as described above, the platform is provided in the circumferential direction of the open ocean structure, so that it can be accessed from all directions between the open ocean structure and the ship.

The access structure to the open ocean structure according to the present invention may further include a connecting plate portion provided below the plurality of platforms.

In the access structure to the open-sea structure constructed in this way, since the joint plate part is provided below the platform, the ship's tip can be contacted with the joint plate part, and the ship can be stabilized. Can be adjoined.

Further, in the access structure to the open ocean structure according to the present invention, the joint plate portion may be configured by arranging a plurality of joint plates in a ladder shape.

In the access structure to the open-sea structure constructed in this way, the joint plate part is constructed by arranging a plurality of joint plates in a ladder shape, so that the joint plate goes up from the ship to the platform. Can also be accessed.

Moreover, the access structure to the open-sea structure according to the present invention may further include a guard post that supports both ends of the plurality of platforms in the width direction.

The predetermined interval between the fence pillars is such that the ship's tip does not enter between the fence pillars as a maximum value. The ship's heel is usually provided with a rubber tire for cushioning, and the diameter of the rubber tire is usually 50 cm or more. For example, the interval between the fenders can be 50 cm or less. In addition, the predetermined interval between the protective columns must be a minimum value that allows an operator to pass between the protective columns. For example, the interval between the fenders can be set to 30 cm or more.
From the above, the predetermined interval between the fenders can be set to 0.3 m to 0.5 m, for example.

The access structure to the open-sea structure according to the present invention may further include a ladder provided on any of the plurality of platforms and extending upward.

In the access structure to the open ocean structure configured as described above, a ladder extending upward is provided on one of the platforms, so that an operator can access a desired location by going up the ladder from the platform. it can.

According to the access structure to the open ocean structure according to the present invention, the worker can safely access between the ship and the platform.

It is a typical front view showing composition of an access structure to an open-sea structure concerning one embodiment of the present invention. It is a typical top view which shows the structure of the access structure to the open ocean structure which concerns on one Embodiment of this invention. It is a typical fragmentary front view which shows the structure of the access structure to the open-sea structure which concerns on one Embodiment of this invention. It is a figure which shows the structure of the access structure to the open ocean structure which concerns on one Embodiment of this invention, and is the typical partial side view seen from the direction orthogonal to FIG. It is a typical fragmentary top view which shows the structure of the access structure to the open-sea structure which concerns on one Embodiment of this invention.

An access structure to an open ocean structure according to an embodiment of the present invention will be described with reference to the drawings. In addition, in the drawings used in the following description, in order to make the features easy to understand, there are cases where the portions that become the features are enlarged for the sake of convenience, and the dimensional ratios of the respective components are not always the same as the actual ones. Absent.

FIG. 1 is a schematic front view showing a configuration of an access structure to an open ocean structure according to an embodiment of the present invention.

An access structure to an open ocean structure (hereinafter simply referred to as an “access structure”) is configured to allow access between a ship and an open ocean structure such as an offshore windmill or open ocean building. . In the present embodiment, an offshore wind turbine will be described as an example of an open-sea structure.

The access structure 100 is provided on the columnar foundation tower A1 of the offshore wind turbine A. The foundation tower A1 is not limited to a cylindrical shape, and a truss structure or the like can be appropriately selected. A nacelle and windmill blades (not shown) are provided on the upper portion of the foundation tower A1.

The access structure 100 includes a plurality of fence pillars 1 fixed to the foundation tower A1, a platform 2 installed between the fence pillars 1, a joint plate portion 3 provided below the platform 2, and a predetermined structure. And a ladder 4 extending upward from the platform 2.

Each fender 1 has a vertical portion 11 extending in the vertical direction, and a curved portion 12 that is curved from the upper and lower ends of the vertical portion 11 and has a distal end fixed to the foundation tower A1. The vertical portion 11 is disposed away from the outer peripheral surface of the foundation tower A1. Even if the ship is struck by a wave several times higher than the significant wave height that reaches about one wave every few hours, the bending portion 12 rides on the guard pillar 1 or sinks under the guard pillar 1. This is to prevent serious damage to the ship side. In addition, when the vertical part 11 has sufficient length so that it may exist in a back | latter stage (paragraph 0027), it is not necessary to curve.

The guard pillars 1 are provided on the outer peripheral surface of the foundation tower A1, and are arranged in a plurality spaced apart from each other along the circumferential direction. In this embodiment, 24 fenders 1 are installed.

The interval (inner distance) between adjacent fenders 1 is preferably 30 cm to 50 cm, and in this embodiment is about 40 cm.

The interval between the guard pillars 1 is about 40 cm, as described above, to prevent the tip of the ship from passing between the guard pillars 1 and colliding with the worker on the platform 2. It is for passing through between the guard pillars 1 and accessing a ship.

Further, the length of the fender column 1 in the direction (vertical direction) along the foundation tower A1 is about 10 m.

The length of the pillar 1 is about 10m, even if the ship is struck by a wave several times higher than the significant wave height that reaches about one wave every few hours, This is to prevent the undercarriage 1 from being submerged and to prevent the ship from being seriously damaged.

The ladder 4 extends upward from the upper platform 23 and is disposed along the outer peripheral surface of the foundation tower A1.

The contact plate portion 3 is disposed below the platform 2. The joint plate part 3 is composed of a plurality of joint plates 31 that are spaced apart in the vertical direction and arranged in a ladder shape. In the present embodiment, the contact plate 31 is made of a steel material such as H steel.

In the present embodiment, the respective contact plates 31 are arranged with an interval of about 15 cm in the vertical direction, and it is possible to put a foot tip between the contact plates 31.

In addition, the height from the upper surface of the platform 2 to the lowest joint plate 31 can be set to about 3 m, for example.

By giving such a large width to the height, the platform 2 and the contact plate 31 are configured so that the tip of the ship can be brought into contact with the contact plate 31 even during high waves. Yes. Thereby, it is possible to prevent the tip of the ship from directly colliding with the foundation tower A1.

A plurality of platforms 2 are arranged over the circumferential direction of the foundation tower A1. In the present embodiment, the three platforms 2, that is, the lower platform 21, the middle platform 22, and the upper platform 23 are configured as one unit. That is, the middle platform 22 is arranged next to the lower platform 21 (left side in front view in FIG. 1), and the upper platform 23 is arranged next to the middle platform 22 (left side in front view in FIG. 1). Four sets of this 1 unit are arranged on the outer periphery of the foundation tower A1.
In addition, the installed heights of the adjacent platforms 2 are different. That is, the middle platform 22 is disposed above the top of the lower platform 21 in the vertical direction, and the upper platform 23 is disposed above the top of the middle platform 22 in the vertical direction. The lower platform 21, the middle platform 22, and the upper platform 23 overlap with each other in the arrangement direction, and the worker can move between the adjacent platforms 2.
In the present embodiment, the lower platform 21, the middle platform 22, and the upper platform 23 are provided with a level difference (height difference) that allows an operator to move up and down between the platforms 2. For example, the step of each platform 2 (the step between the tops of adjacent platforms 21, 22, 23) may be about 0.5 to 1.3 m.

By adopting such an arrangement, any platform 2 from the lower platform 21 to the upper platform 23 can be used even if the tide level fluctuates.

FIG. 2 is a schematic plan view showing the configuration of the access structure 100.

The access structure 100 includes a fencing column 1, a platform 2, a ladder 4, and a plurality of bolt holes A2 (not shown) provided in the foundation tower A1.

The platform 2 is installed on the entire outer periphery of the foundation tower A1 and is installed at 12 locations, but is not limited to 12 locations.

In this way, by providing a plurality of locations on the outer periphery of the foundation tower A1, it is possible to access the foundation tower A1 from the direction that is least affected by the waves in consideration of the wave direction.

The platform 2 is installed between three adjacent guard columns 1, but is not limited to three. The platform 2 has an inner peripheral side fixed to the foundation tower A <b> 1 and an outer peripheral side fixed to the fender column 1. In this embodiment, the platform 2 is bolted to a bolt hole A2 having a predetermined height among a plurality of bolt holes A2 (see FIG. 4) provided in the foundation tower A1.

The platform 2 is not limited to bolt fixing, but may be welding or embedding in concrete, and the fixing method can be appropriately selected.

A joint plate 31 having the same height is disposed between three adjacent guard columns 1 on which each platform 2 is disposed. The width from each platform 2 to the foundation pillar A1 is, for example, about 50 to 100 cm so that the worker can move on the platform.

FIG. 3 is a schematic partial front view showing the configuration of the access structure 100.

The access structure 100 includes a guard pillar 1, a platform 2, and a joint plate 31.

The contact plate 31 is disposed below the platform 2. When the ship's tip touches below the platform 2, it touches the contact plate 31 and the guard column 1 and absorbs the impact of the contact.

When the tide level is different, a platform having an appropriate height can be selected from the platform 21 to the platform 23 according to the tide level.

FIG. 4 is a diagram showing a configuration of the access structure 100, and is a schematic partial side view seen from a direction orthogonal to FIG.

The access structure 100 includes a guard column 1, a contact plate 31, a contact plate support steel 32, and a bolt hole A2.

The contact plate 31 is connected to the contact plate support steel 32. The foundation tower A1 (A) side of the contact plate support steel 32 is connected to a bolt hole A2 provided in the foundation tower A1. When the ship's tip collides with the guard column 1 or the contact plate 31, the impact is transmitted to the base tower A1 through the contact plate support steel 32 and absorbed.

Moreover, the welding plate support steel 32 fixes the welding plate portion 3 by being connected to a bolt hole A2 provided in the foundation tower A1.

FIG. 5 is a schematic partial plan view showing the configuration of the access structure 100.

The access structure 100 includes a guard post 1, a contact plate 31, a contact plate support steel 32, and a bolt hole A2 (not shown).

The connecting plate 31 is constructed between two adjacent guard columns 1.

A contact plate support steel 32 is fixed to the outer peripheral surface of the foundation tower A1. The contact plate support steel 32 extends outward in the normal direction from the outer peripheral surface of the foundation tower A1. The contact plate 31 is supported by the contact plate support steel 32. In this embodiment, the contact plate support steel 32 is made of a steel material such as H steel. In the present embodiment, the contact plate support steel 32 is bolted to a predetermined bolt hole A2 among a plurality of bolt holes A2 (see FIG. 4) provided in the foundation tower A1.

Next, a method for using the access structure 100 will be described.

When the worker accesses the offshore windmill A from the ship, the ship is brought close to the offshore windmill A. At this time, the platform 2 located in the shade is selected from the plurality of platforms 2 arranged along the circumferential direction of the foundation tower A1. Furthermore, among the platforms 2 having different heights, the operator selects a platform 2 having an appropriate height for moving to the platform 2 of the offshore windmill A according to the tide level, and brings the ship closer to the platform 2.

The tip of the ship is brought into contact with a contact plate 31 provided below the platform 2. Here, since the interval between the guard pillars 1 is about 40 cm, the tip of the ship does not enter deeply between the neighboring guard pillars 1. In addition, since the height from the upper surface of the platform 2 to the lowermost joint plate 31 is about 3 m, the tip of the ship can be surely placed at any position of the joint plate portion 3 even during high waves. Can be adjoined.

The worker can move from the tip of the ship to the platform 2 in a posture facing the offshore windmill A (forward-facing). Since the interval between the contact plates 31 is about 15 cm, when the ship contacts the lower position, the worker moves from the tip to the contact plate 31 and moves the ladder-shaped contact plate 31 up to the platform 2. Can be reached.

When the reached platform 2 is in the lower stage, it goes up to the middle platform 22 and the upper platform 23. Similarly, in the case of the middle stage, it goes up to the upper platform 23.

When the worker reaches the upper platform 23, the worker can go up the ladder 4 and reach a desired location.

On the other hand, when the worker enters the ship from the offshore windmill A, the worker descends the ladder 4 and arrives at the upper platform 23. When the platform 2 to which the ship is in contact is in the lower stage, the platform 2 descends to the middle platform 22 and the lower platform 21. Similarly, when it is in contact with the middle platform 22, it descends to the lower platform 21.

Then, board the ship from the platform 2 in a posture facing forward (forward).

In the access structure 100 configured as described above, the plurality of platforms 2 provided on the outer periphery of the offshore wind turbine A and arranged adjacent to each other have different heights. Therefore, the platform 2 having an appropriate height is selected according to the changing tide level, and the ship is brought into contact with the platform 2. When entering the ship from the offshore windmill A, the worker can access with the attitude facing the ship (forward), and when moving from the ship to the offshore windmill A, the worker can access with the attitude facing the offshore windmill A (forward). Can be accessed safely.

Moreover, since the platform 2 is provided over the circumferential direction of the offshore windmill A, it can be accessed from all directions between the offshore windmill A and the ship.

Therefore, even if the wave direction changes and the wave from the offshore windmill A moves, it can be accessed from all directions, so that it can be safely accessed from the wave shadow platform.

Further, since the contact plate portion 3 is provided below the platform 2, the ship's tip can be contacted with the contact plate portion 3, and the ship can be stably contacted.

Further, since the joint plate part 3 is configured by arranging a plurality of joint plates 31 in a ladder shape, it is possible to access the platform 2 from the ship up the joint plate 31.

Moreover, the space | interval of the guard pillars 1 which respectively support the both ends side of the width direction of the platform 2 is about 40 cm. Therefore, the tip of the ship does not enter between the fence pillars 1 and the worker can pass between the fence pillars 1.

Further, since the upper platform 23 is provided with the ladder 4 extending upward, the worker can access the desired location by climbing the ladder 4 from the upper platform 23.

The platform 2 and the connecting plate support steel 32 are bolted to a predetermined bolt hole A2 among the plurality of bolt holes A2 provided in the foundation tower A1 of the offshore wind turbine A. Therefore, the platform 2 and the contact plate support steel 32 can be fixed by changing their positions to a predetermined height.

It should be noted that the assembly procedure shown in the above-described embodiment, or the shapes and combinations of the constituent members are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in this embodiment, although the platform 2 is provided over the circumferential direction of an open-sea structure, this invention is not limited to this. It is only necessary to provide a plurality of platforms 2 having different heights. Moreover, in embodiment shown above, although the platform 2 from which height differs is provided in three steps, this invention is not limited to this. It is sufficient that a plurality of platforms 2 having different heights are provided, and two or more stages may be provided.
As mentioned above, although preferable embodiment of this invention was described, this invention is not limited to these embodiment and its modification. Additions, omissions, substitutions, and other modifications can be made without departing from the spirit of the present invention.
Further, the present invention is not limited by the above description, and is limited only by the appended claims.

According to the access structure to the open-sea structure according to the above-described embodiment, an operator can safely access between the ship and the platform.

DESCRIPTION OF SYMBOLS 1 ... Fence pillar 2 ... Platform 3 ... Joint plate part 4 ... Ladder 11 ... Vertical part 12 ... Curved part 21 ... Lower platform 22 ... Middle platform 23 ... Upper platform 31 ... Joint plate 32 ... Joint plate Support steel 100 ... Access structure A ... Offshore windmill (open ocean structure grain)
A1 ... Foundation tower A2 ... Bolt hole

Claims (6)

1. 
   Provided on the outer periphery of the open ocean structure, with a plurality of platforms arranged next to each other,
   
   An access structure to an open-sea structure, wherein the plurality of platforms have different heights.
   
2. 
   The access structure to the open-sea structure according to claim 1, wherein the plurality of platforms are provided in a circumferential direction of the open-sea structure.
   
3. 
   The access structure to the open-sea structure according to claim 1, further comprising a joint plate portion provided below the plurality of platforms.
   
4. 
   The access structure to the open-sea structure according to claim 3, wherein the joint plate part is configured by arranging a plurality of joint plates in a ladder shape.
   
5. 
   Further comprising fender pillars that respectively support both end sides in the width direction of the plurality of platforms,
   
   The access structure to the open-sea structure according to any one of claims 1 to 4, wherein an interval between the fenders is a predetermined interval.
   
6. 
   The access structure to the open-sea structure according to any one of claims 1 to 5, further comprising a ladder provided on any of the plurality of platforms and extending upward.

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