JP2007160965A - Floating body structure - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a floating body structure capable of ensuring the space between a plurality of floating bodies and reducing the number of members for connecting the floating bodies to each other. <P>SOLUTION: Inner ends of a connection part 2 consisting of a longitudinal rigid body are connected to a predetermined center (an intermediate connection part 4) and extend in the horizontal radial direction. Each floating body 1 is connected to an outer end of the connection part 2 to cause the tensile force between the floating bodies 1 by a tension unit 3 provided between the floating units 1. As a result, the space between the plurality of floating bodies 1 can be ensured. Since the sufficient strength is obtained by the connection part 2 consisting of the rigid body and the tension unit 3 for connecting the floating bodies 1 to each other, the number of the members for connecting the floating bodies 1 to each other is reduced, and the cost is also reduced thereby. Further, the tension unit 3 consists of an arched cable, and is hardly subjected to the resistance of winds and waves. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

  The present invention relates to a floating structure used in, for example, offshore wind power generation facilities.

  Conventionally, as a floating structure, a plurality of floating bodies that stand upright and support each wind power generation facility on the ocean are connected by a mooring chain provided with an intermediate sinker in the middle. There is an offshore wind power generation facility that connects mooring chains with intermediate sinkers. This offshore wind power generation facility can be installed offshore easily even in deep waters. Moreover, the offshore wind power generation facilities are swept by waves and collided, or the relative positional relationship between the wind power generation facilities changes to generate power. This is intended to prevent a situation where the ability is reduced (for example, see Patent Document 1).

JP 2004-176626 A

  However, in the conventional floating structure, in order to prevent a plurality of wind power generation facilities from being brought into contact with each other to prevent mutual interference, a larger distance than the minimum distance that does not reduce the capacity of the wind power generation facilities is required. . Furthermore, since the mooring anchors must be pulled so as not to cause mutual interference between the wind power generation facilities, it is necessary to stretch the mooring chain in a manner that extends toward the side. That is, the conventional floating structure has a problem that a large occupied area is required. For this reason, the problem that the number of members which connect a some floating body increases and cost increases arises.

  In view of the above circumstances, an object of the present invention is to provide a floating structure that can secure a mutual interval between a plurality of floating bodies and can reduce the number of members that connect the floating bodies.

  In order to achieve the above object, a floating structure according to claim 1 of the present invention extends in a horizontal radial direction by connecting a plurality of floating portions on which an article is placed and an inner end to a predetermined center. A connecting portion made of a long rigid body that connects the floating body portions to the outer end, and a tension portion that generates a tensile force between the floating body portions, are provided.

  According to a second aspect of the present invention, there is provided a floating structure according to the first aspect, wherein the tension portion is a stringed cable.

  A floating structure according to a third aspect of the present invention is characterized in that, in the first or second aspect, the floating body portions are equally arranged around a predetermined center.

  A floating structure according to a fourth aspect of the present invention is characterized in that, in any one of the first to third aspects, the connecting portion is made of a precast member.

  A floating structure according to a fifth aspect of the present invention is characterized in that, in any one of the first to fourth aspects, the floating body portion is a submerged type.

  A floating structure according to a sixth aspect of the present invention is characterized in that, in any one of the first to fifth aspects, the connecting portion has substantially the same unit volume weight as water.

  A floating structure according to a seventh aspect of the present invention is the floating structure according to any one of the first to sixth aspects, wherein an intermediate connection portion connected to the inner end of the connection portion at the predetermined center is provided, and the intermediate connection portion is vertically It is formed in the shape of a column extending in the direction, and a tension portion is further provided between each end portion and the floating body portion.

  The floating structure according to an eighth aspect of the present invention is the floating structure according to the seventh aspect, wherein the intermediate connecting portion is configured as a floating body.

  The floating structure according to claim 9 of the present invention is characterized in that, in any one of claims 1 to 8, a wind power generation facility is placed on the floating body.

  In the floating structure according to the present invention, the floating body portion is connected to the outer ends of the connecting portions made of a long rigid body extending in the horizontal radial direction by connecting the inner end to a predetermined center, and a tensile force is generated between the floating body portions. The tension part which produces was provided. As a result, the mutual space | interval of a some floating body part is securable. In addition, since sufficient strength is obtained by the connecting portion of the rigid body structure and the tensile structure that pulls between the floating body portions, the cost can be reduced by reducing the number of members that connect the floating body portions.

  Since the tension portion is made of a stringed cable, it is possible to obtain a floating structure that is hardly affected by wind waves.

  By uniformly disposing the floating body portions around a predetermined center, the strength of connecting the floating body portions can be maintained uniformly.

  By configuring the connecting portion with a precast member, productivity can be improved and cost can be reduced.

  By making the floating body part a submerged type, resistance due to wind waves can be reduced.

  By making the connecting portion have substantially the same unit volume weight as that of water, it is possible to prevent a situation in which excessive stress is applied to the structure connecting the floating body portions.

  The intermediate connecting part provided at the predetermined center is formed in a column shape extending in the vertical direction, and a tensile part is further provided between each end part and the floating body part and the connecting part, so that a three-dimensional tensile force is obtained. Since it is obtained, the strength can be further increased.

  By configuring the intermediate coupling portion as a floating body, a facility (article) can be placed on top of the intermediate coupling portion.

  When the wind power generation facility is placed on the upper part of each floating body, the mutual space between the wind power generation facilities can be secured as the offshore wind power generation facility. In addition, as an offshore wind power generation facility, in order to obtain sufficient strength by a rigid structure connecting portion and a pulling structure that pulls between each floating body portion, the number of members connecting the wind power generation facilities is reduced, thereby reducing the cost. be able to. Furthermore, when the intermediate connection part is configured as a floating body, the management facility of the wind power generation facility can be placed on the upper part of the intermediate connection part to manage the connected wind power generation facility.

  Exemplary embodiments of a floating structure according to the present invention will be described below in detail with reference to the accompanying drawings. Note that the present invention is not limited to the embodiments.

  1 is a plan view showing an embodiment of the floating structure according to the present invention, FIG. 2 is a front view of the floating structure shown in FIG. 1, FIG. 3 is a radial sectional view of the connecting portion shown in FIG. FIG. 2 is a longitudinal sectional view of a connecting portion shown in FIG. 1.

  As shown in FIGS. 1 and 2, the floating body structure has a floating body portion 1, a connecting portion 2, a tension portion 3, and an intermediate connecting portion 4. Further, the floating structure of the present embodiment is used for installing a facility (article) such as a wind power generation facility 5 on the water (offshore) 10 as shown in FIG. The facility is not limited to the wind power generation facility 5.

  The floating body 1 is made of a rigid body such as a steel material, a composite material of steel and concrete, or a concrete material, and floats in water by itself, on which a facility (article) is placed. is there. In FIG. 2, the floating body 1 is a submerged type (semi-sub type) that floats in the water together with the connecting portion 2 and is not easily affected by wind waves on the water 10. A plurality (three in this embodiment) of the floating body 1 are provided. In addition, the floating body 1 may be a precast member that is previously produced on land.

  The connecting portion 2 is a long body made of a rigid body. As shown in FIG. 1, the connecting portion 2 connects the inner ends to a predetermined center (intermediate connecting portion 4) and connects the floating body portions 1 to the outer ends extending in the horizontal radial direction by rigid connection or hinge connection. It is. That is, in the present embodiment, the connecting portion 2 connects the four floating body portions 1 in a radial manner, and is formed in a substantially cross shape in plan view. Moreover, the connection part 2 is formed in the same shape, and each floating body part 1 is equally arranged centering on a predetermined center.

  This connection part 2 consists of rigid bodies, such as a steel material, the composite material of steel, and concrete, or a concrete material, and consists of a precast member divided | segmented into plurality in advance at a factory etc. especially and produced as a connection part unit. The connecting unit has a box cross section, and is formed as a steel pipe when it is made of steel, is formed as a box culvert tube when it is made of a composite material of steel and concrete, and is a fume pipe when it is made of concrete. Formed as. Inside the box cross section of the connecting portion 2 is provided a balance structure for making the unit volume weight substantially the same as the water in which the floating structure is installed. As the balance structure, for example, as shown in FIGS. 3 and 4, the inside of the box section of the connecting unit (connecting unit 2) is divided into upper and lower parts, and the weight chamber 21 in which a weight such as water, stone, or gravel is installed is placed on the lower side. A buoyancy chamber 22 is provided on the upper side for obtaining adjusted buoyancy by air or polystyrene foam. Further, in the weight chamber 21, as shown in FIG. 4, a partition wall 21a is provided to divide the longitudinal direction of the connecting portion unit (connecting portion 2), thereby suppressing the flow of the weight in the longitudinal direction and connecting portion units ( The weight balance in the longitudinal direction of the connecting part 2) is maintained. Then, a plurality of connecting unit units are connected to form a connecting unit 2. The box cross section of the connecting portion 2 is not limited to the substantially circular shape shown in FIG.

  The tension | pulling part 3 consists of a stringed cable, The truss structure with the connection part 2 is comprised so that the tension | tensile_strength between each floating body part 1 may be connected and each floating body part 1 may be produced. Further, as described above, the connecting portions 2 are formed in the same shape, and the tensile force of the tensile portion 3 is evenly distributed between the floating body portions 1 by arranging the floating body portions 1 centered on a predetermined center. It is preferable to generate it.

  The intermediate connecting portion 4 is made of a rigid body such as a steel material, a composite material of steel and concrete, or a concrete material, and is formed in a column shape extending in the vertical direction. The intermediate connecting portion 4 is provided at the predetermined center, and the inner ends of the connecting portions 2 are connected by rigid coupling or hinge coupling. And as shown in FIG. 2, the tension | pulling part 3 is connected between the upper end and lower end of the intermediate | middle connection part 4, and the floating body part 1. As shown in FIG. That is, the tension | pulling part 3 has comprised a part of three-dimensional truss. Although not shown in the figure, when configuring the three-dimensional truss, the floating body 1 is formed in a column shape extending in the vertical direction, and the upper end and the lower end thereof and the upper end and the lower end of the intermediate connecting portion 4 are connected to the tension portion 3. And may be configured to generate a tensile force between them. In addition, the intermediate | middle connection part 4 may be comprised as a floating body.

  The wind power generation facility 5 is placed on the upper part of the floating body 1. In this embodiment, the wind power generation facility 5 includes a support column 51 erected on the upper part of the floating body 1, a generator 52 that is arranged to be rotatable around an axis perpendicular to the upper end of the support column 51, and a generator 52 On the other hand, it is comprised with the windmill 53 arrange | positioned rotatably around the horizontal axis line. In the wind power generation facility 5, power is generated by the rotation of the windmill 53 while the generator 52 rotates in such a manner that the direction of the windmill 53 is variable with respect to the wind direction. In addition, the support | pillar 51 of the wind power generation facility 5 may comprise the lower end part below a water surface as a floating body.

  Moreover, when the intermediate connection part 4 is comprised as a floating body, it is possible to place the upper part of the said intermediate connection part 4 on water, and to mount a facility (article). Although not clearly shown in the drawing, for example, when the wind power generation facility 5 is placed on the floating body 1, a facility (article) such as a management facility for wind power generation equipment is placed on the upper portion of the intermediate connection portion 4. Further, the intermediate connecting portion 4 may be a precast member similarly to the floating body portion 1.

  Although the floating structure configured in this way is not clearly shown in the drawing, for example, the anchor mooring in which an anchor connected to the floating body 1 or the connecting part 2 via a fiber rope or chain is thrown into the water bottom 11 (see FIG. 2). Moored depending on the method. The mooring is not limited to the tight mooring method, and may be appropriately selected according to various situations at the installation location.

  In the embodiment described above, the intermediate connecting portion 4 is provided. However, the inner ends of the connecting portions 2 may be connected to each other at a predetermined center without providing the intermediate connecting portion 4.

  Therefore, in the floating body structure described above, the inner end of the connecting portion 2 made of a long rigid body is connected to a predetermined center (intermediate connecting portion 4) to extend in the horizontal radial direction, and the outer end of the connecting portion 2 is respectively connected. The floating body portions 1 are connected, and a tensile force is generated between the floating body portions 1 by the tension portions 3 provided between the floating body portions 1. As a result, it is possible to ensure the mutual interval between the plurality of floating body portions 1. Moreover, since sufficient strength is obtained by the connecting portion 2 made of a rigid body and the tension portion 3 that connects the floating body portions 1, it is possible to reduce the cost by reducing the number of members that connect the floating body portions 1. Become. Moreover, since the tension | pulling part 3 consists of a stringed cable, it is hard to receive the resistance of a wind wave.

  By arranging the connecting portions 2 in the same shape and evenly arranging the floating body portions 1 around a predetermined center, it is possible to maintain the strength evenly.

  By configuring the connecting portion 2 with a precast member, productivity can be improved and costs can be reduced.

  By making the floating body 1 submerged, it is possible to reduce resistance caused by wind waves.

  By making the connecting part 2 have substantially the same unit volume weight as that of water, it is possible to prevent a situation in which excessive stress is applied to the structure connecting the floating body parts 1.

  In addition, by providing the intermediate connecting portion 4 formed in a columnar shape extending in the vertical direction at a predetermined center, and by providing the tensile portion 3 in a form that forms a solid truss between the upper and lower ends of the intermediate connecting portion 4 and the floating body portion 1, It becomes possible to distribute a plurality of tensile forces generated by the tension portion 3 so as to be applied to the predetermined center side. In addition, since a three-dimensional tensile force can be obtained, the strength in the vertical direction can be increased. Further, the floating body portion 1 and the connecting portion 2 have a columnar shape like the intermediate connecting portion 4, and the upper end and the lower end thereof and the upper end and the lower end of the intermediate connecting portion 4 are connected to each other by generating a tensile force at the pulling portion 3. If constituted in a mode, the strength can be further increased. In particular, in the case where the connecting portion 2 has the same shape and the floating body portions 1 are evenly arranged with respect to a predetermined center, the tensile force of the tensile portion 3 can be evenly generated.

  Furthermore, since the intermediate connecting portion 4 is configured as a floating body, a facility (article) such as a heliport can be placed on the intermediate connecting portion 4.

  When the wind power generation facility 5 is mounted on the upper part of each floating body portion 1, it is possible to ensure the mutual space between the wind power generation facilities 5 as the offshore wind power generation facility. Moreover, since sufficient intensity | strength is obtained by the connection part 2, the tension | pulling part 3, and the intermediate | middle connection part 4 as an offshore wind power generation equipment, it becomes possible to reduce the cost by reducing the member which connects between each wind power generation facility 5 Become. Furthermore, since the intermediate connection part 4 is configured as a floating body, it is possible to manage the connected wind power generation facility 5 by placing a management facility for wind power generation equipment on the upper part of the intermediate connection part 4.

  In the floating structure described above, the number of the floating body portions 1 is four, but the number of the floating body portions 1 is not limited thereto. For example, as shown in FIG. 5, it is conceivable to arrange the wind power generation facility 5 on the upper part of each floating body portion 1 with three floating body portions 1. In any case, it is preferable that the wind turbines 53 do not overlap each other when projected in the horizontal direction, and the power generation capacity of the wind power generation facilities 5 is not reduced. For example, when the wind turbine 53 of the wind power generation facility 5 has a diameter of 125 m, the interval between the columns 51 is set to at least 250 m. For this reason, the said floating body part 1 is connected with the connection part 2 in the aspect which makes the space | interval of each floating body part 1 250 m.

It is a top view which shows the Example of the floating body structure which concerns on this invention. It is a front view of the floating body structure shown in FIG. It is sectional drawing of the radial direction of the connection part shown in FIG. It is sectional drawing of the longitudinal direction of the connection part shown in FIG. It is a top view which shows the other Example of the floating structure which concerns on this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Floating body part 2 Connection part 21 Weight chamber 21a Bulkhead 22 Buoyancy room 3 Tensile part 4 Intermediate connection part 5 Wind power generation facility 51 Prop 52 Generator 53 Windmill 10 Water surface 11 Water bottom

Claims (9)

A plurality of floating bodies on which articles are placed;
A connecting portion made of a long rigid body connecting the floating body portion to an outer end extending in the horizontal radial direction by connecting the inner end to a predetermined center;
A floating body structure comprising: a tension portion that generates a tensile force between the floating body portions.   The floating structure according to claim 1, wherein the tension portion includes a stringed cable.   The floating body structure according to claim 1 or 2, wherein the floating body portions are arranged uniformly around a predetermined center.   The floating structure according to claim 1, wherein the connecting portion is made of a precast member.   The floating body structure according to claim 1, wherein the floating body portion is a submerged type.   The floating structure according to any one of claims 1 to 5, wherein the connecting portion has substantially the same unit volume weight as water.   An intermediate connecting portion connected to the inner end of the connecting portion at the predetermined center is provided, the intermediate connecting portion is formed in a column shape extending in the vertical direction, and further tensioned between each end portion and the floating body portion. The floating structure according to claim 1, wherein a portion is provided.   The floating structure according to claim 7, wherein the intermediate connecting portion is configured as a floating body.   The floating structure according to any one of claims 1 to 8, wherein a wind power generation facility is placed on the floating body.

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