Anchor device, anchor system, and method for setting anchor system

Abstract

An anchor device (20) is provided with: a shaft member (22) which extends along a central axis (A) and to which a tension member (85) is attached; and a first plate member (30) and a second plate member (40) which are configured so as to be able to rotate relative to each other about the central axis (A), the first plate member (30) having a first rear end section (31) farthest from the central axis (A) in the direction in which the first plate member (30) extends and in the direction orthogonal to the central axis (A), and the second plate member (40) having a second rear end section (32) farthest from the central axis (A) in the direction in which the first plate member (30) extends. The second plate member (40) has a second rear end portion (41) farthest from the central axis (A) in the direction of extension of the second plate member (40) and orthogonal to the central axis (A), and the anchor device (20) is configured so as to be capable of changing from a folded state in which the first rear end portion (31) and the second rear end portion (41) are close to each other to an unfolded state in which the first rear end portion (31) and the second rear end portion (41) are separated from each other.

Description

Technical Field

[0001] This invention relates to anchor devices, anchor systems, and methods for installing anchor systems. Background Technology

[0002] A type of wind power generation device used while floating at sea is known. Such a wind power generation device is also called a floating offshore wind power generation device. A floating offshore wind power generation device includes a floating structure and a mooring system. The floating structure includes blades that rotate in the wind, a nacelle housing the generator, a tower supporting the nacelle, and a support for supporting the tower. The mooring system is a system used to moor the floating structure to a foundation. The mooring system includes an anchor disposed within the foundation and a mooring rope connecting the floating structure to the anchor. The mooring rope, for example, is a metal wire, connecting the support of the floating structure to the anchor. An example of a mooring system is disclosed in JPS 61-7493U.

[0003] Anchors included in mooring systems include pile anchors, suction anchors, towed anchors, and suction-embedded anchors. Pile anchors and suction anchors have the advantage of being relatively large and capable of exerting a large holding force, but they have the disadvantage of requiring large vessels or large construction machinery for installation, resulting in high installation costs and long installation periods. Towed anchors and suction-embedded anchors, on the other hand, have the advantage of not requiring large vessels or large construction machinery for installation, but they are relatively small and therefore cannot exert a large holding force. It should be noted that holding force refers to the force generated when a tensile force is applied to the anchor via the mooring rope, which the anchor resists when it moves, slides, or is pulled out of the foundation where it is anchored. Summary of the Invention

[0004] The present invention was made in consideration of these problems, and its object is to provide an anchor device, an anchor system, and a method for setting the anchor system that can be miniaturized during installation and can exert a large holding force after installation.

[0005] 1. The anchoring device involved in this invention comprises: A shaft component extending along a central axis and fitted with a tensioning member; and The first plate component and the second plate component are configured to rotate about the central axis. The first plate component has a first rear end portion, which is furthest from the central axis in the extending direction of the first plate component and in a direction orthogonal to the central axis. The second plate component has a second rear end portion, which is furthest from the central axis in the extending direction of the second plate component and in a direction orthogonal to the central axis. The anchor device is configured to change from a folded state where the first rear end and the second rear end are close together to an unfolded state where the first rear end and the second rear end are separated.

[0006] 2. The anchoring device involved in this invention is the anchoring device described in the first aspect. The first plate component has a first outer surface, which faces in the folded state in a direction opposite to that of the second plate component. The second plate component has a second outer surface, which faces in the folded state in a direction opposite to that of the first plate component. The first outer surface includes a first inclined outer surface, which, in the folded state, approaches the second plate component as it moves closer to the shaft component. The second outer surface includes a second inclined outer surface, which, in the folded state, approaches the first plate component as it moves closer to the shaft component.

[0007] 3. The anchoring device involved in this invention is the anchoring device described in the first aspect or the second aspect. The first rear end portion includes a first inclined end face, which, in the folded state, approaches the second plate component as it moves closer to the shaft component. The second rear end portion includes a second inclined end face, which, in the folded state, approaches the first plate component as it approaches the shaft component.

[0008] 4. The anchoring device involved in this invention is any one of the anchoring devices described in the first to third aspects. The anchoring device also includes: A third plate component is connected to the first plate component and is configured to rotate relative to the first plate component; The fourth plate component is connected to the second plate component and is configured to rotate relative to the second plate component.

[0009] 5. The anchoring device involved in this invention is any one of the anchoring devices described in the first to fourth aspects. The anchor device has a limiting part that, in the deployed state, limits the angle between the first plate component and the second plate component to below a predetermined angle.

[0010] 6. The anchoring device involved in this invention is the anchoring device described in the fifth aspect. The limiting part includes a contact part, which makes contact with each other when the angle between the first plate component and the second plate component is the predetermined angle.

[0011] 7. The anchoring device involved in this invention is the anchoring device described in the fifth or sixth aspect. The limiting part includes a connecting member that connects the first plate member and the second plate member to each other.

[0012] 8. The anchoring device according to the present invention comprises: A shaft component that extends along a central axis and is fitted with a tensioning component; A first frame component and a second frame component, the first frame component and the second frame component being configured to rotate relative to each other about the central axis; and The pressure-bearing component is mounted on the first frame component and the second frame component. The first frame component has a first rear end portion, which is furthest from the central axis in a direction orthogonal to the central axis. The second frame component has a second rear end portion, which is furthest from the central axis in a direction orthogonal to the central axis. The anchor device is configured to change from a folded state where the first rear end and the second rear end are close together to an unfolded state where the first rear end and the second rear end are separated.

[0013] 9. The anchoring device involved in this invention is the anchoring device described in aspect eight. The anchoring device also includes: A third frame member, which is connected to the first frame member and configured to rotate relative to the first frame member; and A fourth frame component, which is connected to the second frame component and configured to be rotatable relative to the second frame component.

[0014] 10. The anchoring device involved in this invention is the anchoring device described in aspect eight or aspect nine. The anchor device has a limiting part that, in the unfolded state, limits the angle between the first frame component and the second frame component to a predetermined angle or less.

[0015] 11. The anchoring device involved in this invention is the anchoring device described in aspect ten. The limiting part includes a connecting member that connects the first frame member and the second frame member to each other.

[0016] 12. The anchor system involved in this invention comprises: The anchoring device described in any of the first to eleventh aspects; and A tensioning component, which is mounted on the shaft component.

[0017] 13. The method for setting up the anchor system involved in this invention comprises: The process of placing the anchor device of the anchor system described in the twelfth aspect within the subgrade in the folded state; and The process of changing the anchor device from the folded state to the unfolded state by stretching the stretching member.

[0018] Beneficial effects: According to the present invention, an anchor device, an anchor system, and a method for installing the anchor system can be provided that are miniaturized during installation and can exert a large holding force after installation. Attached Figure Description

[0019] Figure 1 This is a diagram used to illustrate the first embodiment of the present invention, showing an example of a wind power generation device and an anchor system.

[0020] Figure 2 This is a side view showing an example of an anchor device in an anchor system in a folded state.

[0021] Figure 3 This indicates the state during the unfolding process. Figure 2 Side view of the anchor device.

[0022] Figure 4 In the expanded state Figure 2 Side view of the anchor device.

[0023] Figure 5 In the expanded state Figure 4 Plan view of the anchoring device.

[0024] Figure 6 This is a diagram illustrating an example of how an anchor system is set up.

[0025] Figure 7 This is a diagram illustrating an example of how an anchor system is set up.

[0026] Figure 8 This is a diagram illustrating an example of how an anchor system is set up.

[0027] Figure 9 This is a diagram illustrating an example of how an anchor system is set up.

[0028] Figure 10 This is a diagram illustrating an example of how an anchor system is set up.

[0029] Figure 11 This is a side view showing a modified example of the anchor device in its folded state.

[0030] Figure 12 In the expanded state Figure 11 Side view of the anchor device.

[0031] Figure 13 This is a side view showing other variations of the anchor device in a folded state.

[0032] Figure 14 In the expanded state Figure 13 Side view of the anchor device.

[0033] Figure 15 This is a side view showing another variation of the anchor device in its folded state.

[0034] Figure 16 This indicates the state during the unfolding process. Figure 15 Side view of the anchor device.

[0035] Figure 17 In the expanded state Figure 15 Side view of the anchor device.

[0036] Figure 18 This is a side view showing another variation of the anchor device in its unfolded state.

[0037] Figure 19 This is a side view showing another variation of the anchor device in its folded state.

[0038] Figure 20 This indicates the state during the unfolding process. Figure 19 Side view of the anchor device.

[0039] Figure 21 This indicates the state during the unfolding process. Figure 19 Side view of the anchor device.

[0040] Figure 22 In the expanded state Figure 19 Side view of the anchor device.

[0041] Figure 23 This is a side view of the anchor device used in experiments conducted by the inventors of this invention, shown in a folded state.

[0042] Figure 24 This indicates the state during the unfolding process. Figure 23 Side view of the anchor device.

[0043] Figure 25 It means Figure 23 A graph showing the relationship between the pull-out amount and the unfolding angle of the anchor device.

[0044] Figure 26 It is a graph showing the relationship between the pull-out amount S (mm) of the anchor device 20 and the unfolding angle θ (degrees) when the angle θ2 of the anchor device 20 is changed.

[0045] Figure 27 This is a graph showing the relationship between the pull-out amount S (mm) of the anchor device 20 and the unfolding angle θ (degrees) when the angle θ3 of the anchor device 20 is changed while the angle θ2 of the anchor device 20 is fixed at 20 degrees.

[0046] Figure 28 This is a graph showing the relationship between the angle θ3 of the anchor device 20 and the pull-out amount S in the unfolded and converged state of the device 20 when the angle θ2 is fixed at 20 degrees.

[0047] Figure 29 This is a plan view showing an example of the installation position of the tensioning component in an anchoring device.

[0048] Figure 30 It is represented in the folded state. Figure 29 Side view of the anchor device.

[0049] Figure 31 This is a plan view showing other examples of the installation positions of tensioning components in an anchoring device.

[0050] Figure 32 This is another example of a plan view showing the installation position of the tensioning component in an anchoring device.

[0051] Figure 33 This is a diagram illustrating the second embodiment of the present invention, and is a plan view showing an example of an anchor device in its unfolded state.

[0052] Figure 34 It is represented in the folded state. Figure 33 A cross-sectional view of the anchor device.

[0053] Figure 35 In the expanded state Figure 33 A cross-sectional view of the anchor device.

[0054] Figure 36 This is a plan view showing another example of the anchor device of the second embodiment in its unfolded state.

[0055] Figure 37 It is represented in the folded state. Figure 36 A cross-sectional view of the anchor device.

[0056] Figure 38 In the expanded state Figure 36 A cross-sectional view of the anchor device.

[0057] Figure 39 This is a plan view showing yet another example of the anchor device of the second embodiment in its unfolded state.

[0058] Figure 40 It is represented in the folded state. Figure 39A cross-sectional view of the anchor device.

[0059] Figure 41 In the expanded state Figure 39 A cross-sectional view of the anchor device.

[0060] Figure 42 This is a top view showing an example of the configuration of a wind power generation device and anchoring device. Detailed Implementation

[0061] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. It should be noted that, in the accompanying drawings, for ease of illustration and understanding, the scale and aspect ratios relative to the actual objects have been appropriately altered and exaggerated.

[0062] First Implementation Method Figure 1 This diagram illustrates a first embodiment of the present invention and shows an example of a wind power generation device 10 and an anchor system 80. The wind power generation device 10 of this embodiment is a so-called floating offshore wind power generation device that generates electricity while floating on a water layer W. The water layer W is, for example, a layer of seawater or freshwater. That is, the wind power generation device 10 of this embodiment is configured to float on the surface of the sea or a lake.

[0063] The wind power generation device 10 includes blades 11 that rotate in response to wind, a nacelle 12 that houses a generator, a tower 13 that supports the nacelle 12, and a support 14 that supports the tower 13. The blades 11 are connected to the generator housed in the nacelle 12 via gears or other mechanisms. In the wind power generation device 10, the blades 11 are rotated by wind, thereby generating electricity. The generated electricity is transmitted to a substation, such as one located on land, via cables not shown.

[0064] The anchor system 80 in this embodiment is used to hold the wind power generation device 10 in a predetermined position. It should be noted that the anchor system 80 can also be used to hold other devices or structures besides the wind power generation device 10 in a predetermined position. That is, the anchor system 80 can also be used to hold other devices or structures positioned on or within the water layer W in a predetermined position. Furthermore, the anchor system 80 can also be used to maintain the position and orientation of devices or structures positioned on land or floating in the atmosphere. For example, the anchor system 80 can also be used to maintain the orientation of tower-shaped or columnar structures such as power transmission towers and chimneys positioned on land.

[0065] The anchor system 80 includes an anchor device 20 and a tension member 85. The tension member 85 serves as a mooring rope, exerting a tensile force on the anchor device 20 disposed within the foundation layer G. The tension member 85 is mounted on the shaft member 22 of the anchor device 20 (described later). The tension member 85 can be made of metal wire, a rod, or a plate, etc., without particular limitation. The tension member 85 can be a flexible component or a rigid body.

[0066] Figure 2 This is a side view showing an example of the anchor device 20 in its folded state. Figure 3 This is a side view of the anchor device 20 in its unfolded state. Figure 4 This is a side view of the anchor device 20 in its unfolded state. Figure 5 This is a plan view showing device 20. It should be noted that... Figure 2 and Figure 5 The diagram of the stretching component 85 is omitted.

[0067] The anchoring device 20 includes a shaft member 22, a first plate member 30, and a second plate member 40. The first plate member 30 and the second plate member 40 have a generally plate-like shape. The shaft member 22 has a cylindrical shape and extends along a central axis A. The central axis A is the axis of rotation for the relative rotation of the first plate member 30 and the second plate member 40. The central axis A extends along the plate surfaces of the first plate member 30 and the second plate member 40. It should be noted that the plate surface of the first plate member 30 refers to the surface aligned with the direction in which the first plate member 30 extends and expands when viewed as a whole. Similarly, the plate surface of the second plate member 40 refers to the surface aligned with the direction in which the second plate member 40 extends and expands when viewed as a whole. The first plate member 30 and the second plate member 40 are respectively mounted on the shaft member 22. The first plate member 30 and the second plate member 40 are configured to rotate relative to each other about the central axis A. In this embodiment, the first plate member 30 and the second plate member 40 are configured as a hinge that rotates relative to each other about the central axis A.

[0068] The first plate member 30 has a first rear end portion 31. The first rear end portion 31 is the end of the first plate member 30 that is furthest from the central axis A. More specifically, the first rear end portion 31 is the end of the first plate member 30 that is furthest from the central axis A in the extending direction of the first plate member 30 and in a direction orthogonal to the central axis A. The second plate member 40 has a second rear end portion 41. The second rear end portion 41 is the end of the second plate member 40 that is furthest from the central axis A. More specifically, the second rear end portion 41 is the end of the second plate member 40 that is furthest from the central axis A in the extending direction of the second plate member 40 and in a direction orthogonal to the central axis A.

[0069] The anchor device 20 in this embodiment is configured to change from a folded state to an unfolded state. The folded state refers to the anchor device 20 being closed to its maximum extent. In other words, the folded state is when the first rear end portion 31 and the second rear end portion 41 are maximally close to each other. In the folded state, the first rear end portion 31 and the second rear end portion 41 may or may not be in contact with each other. The unfolded state refers to the anchor device 20 being unfolded to its maximum extent. In other words, the unfolded state is when the first rear end portion 31 and the second rear end portion 41 are maximally separated from each other.

[0070] The first plate member 30 has a first inner surface 35 and a first outer surface 37. The first inner surface 35 is the surface opposite to the second plate member 40 in the folded state. The first outer surface 37 is the surface facing the opposite direction to the second plate member 40 in the folded state. The second plate member 40 has a second inner surface 45 and a second outer surface 47. The second inner surface 45 is the surface opposite to the first plate member 30 in the folded state. The second outer surface 47 is the surface facing the opposite direction to the first plate member 30 in the folded state. In the folded state, the first inner surface 35 and the second inner surface 45 are opposite to each other, and the first outer surface 37 and the second outer surface 47 face substantially opposite directions.

[0071] One end of the tension member 85 is mounted to the shaft member 22. Preferably, the tension member 85 is mounted at multiple locations on the shaft member 22. For example, the tension member 85 may also be mounted at two locations at both ends of the shaft member 22 (see reference). Figure 29 and Figure 30 Alternatively, the tension members 85 installed at both ends of the shaft member 22 can be connected to each other so that tension can be performed through a tension member 85.

[0072] Reference Figures 2 to 10 The method for setting up the anchor system 80 in this embodiment will be described.

[0073] exist Figure 2 The anchor device 20 in its folded state is shown in the image. Figure 2 In the example shown, in the folded state, the first inner surface 35 and the second inner surface 45 are opposite to each other and in contact with each other. The anchor device 20, in the folded state, is located from below (…). Figure 2 The projected area is smallest when observed from below.

[0074] In this embodiment, the anchor device 20 is disposed within the subgrade G in the folded state (see reference). Figure 2 and Figure 6 ).exist Figure 6In the example shown, the folded anchor device 20 is inserted into the foundation layer G using a suction pile 17. The suction pile 17 is suspended from the work vessel 16 floating on the water layer W using a metal wire 18. In this embodiment, the anchor device 20 can be inserted into the foundation layer G in a folded state with the smallest projected area when viewed from below. This significantly reduces the resistance experienced by the anchor device 20 from the foundation layer G. Therefore, the anchor device 20 can be positioned into the foundation layer G without using large vessels or large construction machinery. Then, as... Figure 7 As shown, the suction pile 17 is lifted by stretching the metal wire 18 using the work vessel 16.

[0075] Next, the tensioning component 85 is stretched using the work vessel 16. As a result, the anchor device 20 unfolds (see reference). Figure 3 and Figure 8 By stretching the tension member 85, the shaft member 22 is stretched. At this time, the soil and sand constituting the base layer G enter the space between the first plate member 30 and the second plate member 40, and the first plate member 30 and the second plate member 40 separate from each other.

[0076] If the tensioning member 85 is further stretched, the anchor device 20 becomes deployed (see reference). Figure 4 and Figure 9 That is, the anchor device 20 is in its most extended state. The angle θ1 between the first inner surface 35 and the second inner surface 45 in the extended state can be, for example, between 90 degrees and 180 degrees. The angle θ1 is measured in a plane orthogonal to the central axis A. Furthermore, angle θ1 is the angle between the first inner surface 35 and the second inner surface 45 that does not include the plate members 30 and 40.

[0077] It should be noted that, particularly when the ground layer G is composed of sand, the anchor device 20 may experience significant resistance from the ground layer G during installation. To reduce this resistance, vibration can be applied to the anchor device 20 or water can be sprayed onto the ground layer G surrounding the anchor device 20 during deployment. This increases the fluidity of the ground layer G around the anchor device 20, reducing the resistance experienced by the anchor device 20 during installation. A vibrator can also be installed on the anchor device 20 to apply vibration. Additionally, water can be sprayed onto the ground layer G around the anchor device 20 beforehand by pre-installing a tensioning member 85 along a flexible hose, allowing water to be sprayed from the work vessel 16.

[0078] Then, as Figure 10 As shown, the tension member 85 is connected to the wind power generation device 10. In this state, one end of the tension member 85 is connected to the anchor device 20, and the other end is connected to the support portion 14 of the wind power generation device 10. Figure 10The image shows a wind power generation device 10 connected to an anchor system 80, but in reality, the wind power generation device 10 can also be moored to the ground layer G by multiple (e.g., more than three) anchor systems 80.

[0079] Anchor device 20 in the deployed state is positioned in the opposite direction to the tensioning member 85. Figure 4 and Figure 9 The projected area is largest when viewed from below. Therefore, in Figure 4 , Figure 9 as well as Figure 10 When the tensioning component 85 is stretched, the anchor device 20 generates a large holding force.

[0080] The anchor device 20 of this embodiment includes a shaft member 22 extending along a central axis A and on which a tension member 85 is mounted, and a first plate member 30 and a second plate member 40 configured to rotate about the central axis A. The first plate member 30 has a first rear end portion 31, which is furthest from the central axis A in the extending direction of the first plate member 30 and in a direction orthogonal to the central axis A. The second plate member 40 has a second rear end portion 41, which is furthest from the central axis A in the extending direction of the second plate member 40 and in a direction orthogonal to the central axis A. The anchor device 20 is configured to change from a folded state in which the first rear end portion 31 and the second rear end portion 41 are close together to an unfolded state in which the first rear end portion 31 and the second rear end portion 41 are separated.

[0081] The anchor system 80 of this embodiment includes the anchor device 20 described above and a tension member 85 installed on the shaft member 22.

[0082] The method for setting up the anchor system 80 in this embodiment includes a step of placing the anchor device 20 of the anchor system 80 into the subgrade G in a folded state and a step of changing the anchor device 20 from a folded state to an unfolded state by stretching the tension member 85.

[0083] According to this arrangement of the anchor device 20, anchor system 80, and anchor system 80, the anchor device 20 can be inserted into the ground layer G in a folded state with the smallest projected area when viewed from below. This significantly reduces the resistance experienced by the anchor device 20 from the ground layer G. Therefore, the anchor device 20 can be installed in the ground layer G without using large vessels or large construction machinery. Furthermore, the anchor device 20 has the largest projected area when viewed from the direction opposite to the tension member 85 in its unfolded state. Therefore, when the tension member 85 is stretched in the unfolded state, a large holding force is generated in the anchor device 20. In other words, according to this arrangement of the anchor device 20, anchor system 80, and anchor system 80, the anchor device 20 can be easily installed in the ground layer G and can exert a large holding force after installation.

[0084] Various modifications can be made to the above embodiments. Hereinafter, variations of the above embodiments will be described with appropriate reference to the accompanying drawings. In the following description and the accompanying drawings used in the description, the same reference numerals are used for parts that can be configured in the same way as the corresponding parts in the above embodiments, and repeated descriptions are omitted.

[0085] Figure 11 This is a side view showing a modified example of the anchor device 20 in its folded state. Figure 12 This is a side view of the anchor device 20 in its unfolded state. It should be noted that... Figure 11 The diagram of the stretching component 85 is omitted.

[0086] In the anchor device 20 of this modified example, the first outer surface 37 of the first plate member 30 includes a first inclined outer surface 38. The first inclined outer surface 38 is the surface that approaches the second plate member 40 as it approaches the shaft member 22 in the folded state. Additionally, the second outer surface 47 of the second plate member 40 includes a second inclined outer surface 48. The second inclined outer surface 48 is the surface that approaches the first plate member 30 as it approaches the shaft member 22 in the folded state. Specifically, the anchor device 20 of this modified example includes a first inclined outer surface 38 and a second inclined outer surface 48.

[0087] The anchor device 20 has a first inclined outer surface 38 and / or a second inclined outer surface 48, thereby giving the anchor device 20 an integral, tapered shape. Specifically, in Figure 11 In the side view shown, the width (thickness) of the anchor device 20 decreases as it approaches the shaft member 22. This reduces the resistance experienced by the anchor device 20 from the ground layer G when it is inserted into the ground layer G. Furthermore, the wider widths of the first rear end portion 31 and the second rear end portion 41 increase the resistance experienced from the ground layer G when a tensile force is applied to the anchor device 20. However, the rear end portions 31 and 41 easily capture the soil and sand constituting the ground layer G, resulting in easier deployment.

[0088] The angles between the inner surface 35 and the inclined outer surface 38, and between the inner surface 45 and the inclined outer surface 48, are respectively defined as θ2. Angle θ2 can be, for example, between 5 degrees and 30 degrees. Angle θ2 is measured in a plane orthogonal to the central axis A. Furthermore, angle θ2 is the angle formed inside the plate members 30 and 40, one of the two angles formed between the inner surfaces 35 and 45 and the inclined outer surfaces 38 and 48.

[0089] In the anchor device 20 of this modified example, the first plate member 30 has a first outer surface 37, which faces the opposite direction to the second plate member 40 in the folded state. The second plate member 40 has a second outer surface 47, which faces the opposite direction to the first plate member 30 in the folded state. The first outer surface 37 includes a first inclined outer surface 38, which approaches the second plate member 40 as it approaches the shaft member 22 in the folded state. The second outer surface 47 includes a second inclined outer surface 48, which approaches the first plate member 30 as it approaches the shaft member 22 in the folded state.

[0090] With this type of anchoring device 20, the resistance experienced by the anchoring device 20 from the ground layer G can be reduced when it is inserted into the ground layer G. Furthermore, although the resistance from the ground layer G increases when a tensile force is applied to the anchoring device 20, an easier deployment effect can be expected. Therefore, the anchoring device 20 can be more easily installed into the ground layer G without using large vessels or large construction machinery.

[0091] Figure 13 This is a side view showing other variations of the anchor device 20 in its folded state. Figure 14 This is a side view of the anchor device 20 in its unfolded state. It should be noted that... Figure 13 The diagram of the stretching component 85 is omitted.

[0092] In the anchor device 20 of this modified example, the first rear end portion 31 of the first plate member 30 includes a first inclined end face 33. The first inclined end face 33 is the surface that approaches the second plate member 40 as it approaches the shaft member 22 in the folded state. Additionally, the second rear end portion 41 of the second plate member 40 includes a second inclined end face 43. The second inclined end face 43 is the surface that approaches the first plate member 30 as it approaches the shaft member 22 in the folded state. Specifically, the anchor device 20 of this modified example includes a first inclined end face 33 and a second inclined end face 43.

[0093] In this modified example, the tension member 85 stretches the shaft member 22, thereby causing the soil and sand forming the base layer G to enter the space between the first inner surface 35 and the second inner surface 45 along the first inclined end face 33 and / or the second inclined end face 43. Therefore, the anchor device 20 can be deployed with a smaller amount of displacement.

[0094] The angle θ3 between the inner surfaces 35, 45 and the inclined end faces 33, 43 can be, for example, 45 degrees or more and 90 degrees or less. The angle θ3 is measured in a plane orthogonal to the central axis A. Furthermore, the angle θ3 is the angle formed on the outside of the plate members 30, 40, one of the two angles formed between the inner surfaces 35, 45 and the inclined end faces 33, 43.

[0095] In the anchor device 20 of this modified example, the first rear end 31 includes a first inclined end face 33 that approaches the second plate member 40 as it approaches the shaft member 22 in the folded state, and the second rear end 41 includes a second inclined end face 43 that approaches the first plate member 30 as it approaches the shaft member 22 in the folded state.

[0096] According to such an anchor device 20, when the anchor device 20 is deployed, the tension member 85 tensions the shaft member 22, thereby causing the soil and sand forming the base layer G to enter the space between the first inner surface 35 and the second inner surface 45 along the first inclined end face 33 and / or the second inclined end face 43. Therefore, the anchor device 20 can be deployed easily.

[0097] In other variations not shown, the first plate member 30 and the second plate member 40 may also have a shape in which the middle portion is bent toward the first outer surface 37 and the second outer surface 47, respectively; in other words, the first rear end 31 and the second rear end 41 are separated in the folded state. With such a shape, by stretching the tension member 85, the soil and sand constituting the base layer G enter the space between the first inner surface 35 and the second inner surface 45 of the bent portion. Therefore, the anchor device 20 can be deployed with a smaller amount of displacement.

[0098] Figure 15 This is a side view showing another variation of the anchor device 20 in its folded state. Figure 16 This is a side view of the anchor device 20 in its deployed state. Figure 17 This is a side view of the anchor device 20 in its unfolded state. It should be noted that... Figure 15 The diagram of the stretching component 85 is omitted.

[0099] The anchor device 20 in this modified example has a limiting part 70. In the unfolded state, the limiting part 70 limits the angle between the first plate member 30 and the second plate member 40 to a predetermined angle or less.

[0100] exist Figures 15-17 In the example shown, the limiting part 70 has a contact part 72. The contact part 72 is the portion that contacts each other when the angle between the first plate member 30 and the second plate member 40 is a predetermined angle. The contact part 72 includes a protrusion 39 and a recess 49. In the illustrated example, the first plate member 30 has a protrusion 39 and the second plate member 40 has a recess 49. It should be noted that this is not a limitation; the first plate member 30 may also have a recess 49 and the second plate member 40 may have a protrusion 39.

[0101] like Figures 15-17As shown, when the anchor device 20 is in the deployed state, the protrusion 39 enters the recess 49, and the protrusion 39 and the recess 49 come into contact with each other. In this state, the angle θ1 between the first inner surface 35 and the second inner surface 45 cannot become larger. The protrusion 39 and the recess 49 are configured such that the angle between the first plate member 30 and the second plate member 40 when the protrusion 39 and the recess 49 are in contact with each other is a predetermined angle. Thus, the angle between the first plate member 30 and the second plate member 40 is limited to a predetermined angle or less.

[0102] The anchor device 20 of this modification has a limiting part 70, which, in the unfolded state, limits the angle between the first plate member 30 and the second plate member 40 to a predetermined angle or less.

[0103] In addition, in the anchor device 20 of this modified example, the limiting part 70 includes a contact part 72, which contacts each other when the angle between the first plate member 30 and the second plate member 40 is a predetermined angle.

[0104] With such an anchor device 20, the angle between the first plate member 30 and the second plate member 40 can be limited to a predetermined angle or less. Therefore, the angle between the first plate member 30 and the second plate member 40 can be predetermined in a manner that allows the anchor device 20 to exert a greater holding force while it is installed within the subgrade G.

[0105] Figure 18 This is a side view showing another variation of the anchor device 20 in its unfolded state.

[0106] exist Figure 18 In the example shown, the limiting part 70 includes a connecting member 74. The connecting member 74 connects the first plate member 30 and the second plate member 40 to each other. The length of the connecting member 74 is configured such that the angle θ1 between the first inner surface 35 and the second inner surface 45 is a predetermined angle when the connecting member 74 is extended (extended). Thus, the angle between the first plate member 30 and the second plate member 40 in the extended state (the angle θ1 between the first inner surface 35 and the second inner surface 45) is limited to below a predetermined angle. The connecting member 74 can be made of, for example, metal wire, chain, or rod, without particular limitation.

[0107] In the anchor device 20 of this modified example, the limiting part 70 includes a connecting part 74 that connects the first plate part 30 and the second plate part 40 to each other.

[0108] With such an anchoring device 20, the angle between the first plate component 30 and the second plate component 40 can be limited to a specified angle or less. This allows the angle between the first plate component 30 and the second plate component 40 to be specified in a way that the anchoring device 20 exerts a greater holding force while it is installed within the subgrade G.

[0109] Figure 19 This is a side view showing another variation of the anchor device 20 in its folded state. Figure 20 This is a side view of the anchor device 20 in its deployed state. Figure 21 This is a side view of the anchor device 20 in its deployed state. Figure 22 This is a side view of the anchor device 20 in its unfolded state. It should be noted that... Figure 19 and Figure 20 The diagram of the stretching component 85 is omitted.

[0110] exist Figures 19-22 In the example shown, the anchor device 20 includes a third plate member 50 and a fourth plate member 60 in addition to the first plate member 30 and the second plate member 40. The third plate member 50 is connected to the first plate member 30 and configured to rotate relative to the first plate member 30. Specifically, the third plate member 50 is configured to rotate relative to the first plate member 30 about a rotation axis 52. The rotation axis 52 has a central axis extending parallel to the central axis A. The rotation axis 52 is the axis of rotation for relative rotation between the first plate member 30 and the third plate member 50. The fourth plate member 60 is connected to the second plate member 40 and configured to rotate relative to the second plate member 40. Specifically, the fourth plate member 60 is configured to rotate relative to the second plate member 40 about a rotation axis 62. The rotation axis 62 has a central axis extending parallel to the central axis A. The rotation axis 62 is the axis of rotation for relative rotation between the second plate member 40 and the fourth plate member 60.

[0111] exist Figures 19-22 In the example shown, in the folded state, the length of the third plate member 50 along the direction orthogonal to the central axis A is smaller than the length of the first plate member 30. Furthermore, in the folded state, the length of the fourth plate member 60 along the direction orthogonal to the central axis A is smaller than the length of the second plate member 40. The rotation angle of the third plate member 50 relative to the first plate member 30 can also be limited to a predetermined angle. Similarly, the rotation angle of the fourth plate member 60 relative to the second plate member 40 can also be limited to a predetermined angle.

[0112] In this variation, Figure 19 In the state shown, if the tension member 85 is stretched, the soil and sand constituting the base layer G will enter the space between the third plate member 50 and the fourth plate member 60. Thus, as... Figure 20As shown, the third plate component 50 rotates about the rotation axis 52 and the fourth plate component 60 rotates about the rotation axis 62. Specifically, the third plate component 50 rotates in the opposite direction to the second plate component 40, and the fourth plate component 60 rotates in the opposite direction to the first plate component 30. At this time, since the lengths of the third plate component 50 and the fourth plate component 60 are smaller than the lengths of the first plate component 30 and the second plate component 40, a smaller force is required to rotate the third plate component 50 and the fourth plate component 60 relative to the first plate component 30 and the second plate component 40. In this modified example, to... Figure 20 In the state shown, the third plate component 50 and the fourth plate component 60 are configured such that they do not continue to rotate relative to the first plate component 30 and the second plate component 40.

[0113] If in Figure 20 If the tension member 85 is further stretched in the state shown, the soil and sand constituting the base layer G will move along the inner surfaces of the third plate member 50 and the fourth plate member 60 toward the space between the first plate member 30 and the second plate member 40. Thus, the soil and sand constituting the base layer G enter the space between the first plate member 30 and the second plate member 40, as shown. Figure 21 As shown, the anchor device 20 unfolds. If the tensioning member 85 is further stretched, then as... Figure 22 As shown, the anchor device 20 is in the deployed state.

[0114] The anchor device 20 in this modified example further includes a third plate component 50 and a fourth plate component 60, the third plate component 50 being connected to the first plate component 30 and configured to rotate relative to the first plate component 30, and the fourth plate component 60 being connected to the second plate component 40 and configured to rotate relative to the second plate component 40.

[0115] According to this anchoring device 20, when the tensioning member 85 is stretched, the third plate member 50 and the fourth plate member 60 are rotated relative to the first plate member 30 and the second plate member 40 with a small force. This allows the soil and sand constituting the subgrade G to easily enter the space between the third plate member 50 and the fourth plate member 60. Guided by the inner surfaces of the third plate member 50 and the fourth plate member 60, the soil and sand entering the space between the first plate member 30 and the second plate member 40. Therefore, the anchoring device 20 can be easily deployed.

[0116] It should be noted that the anchor device 20 in this modified example may also be provided with a first inclined end face 33 and / or a second inclined end face 43. In addition, the anchor device 20 in this modified example may also be provided with a first inclined outer surface 38 and / or a second inclined outer surface 48.

[0117] Next, refer to Figures 23-25The experiments conducted by the inventors of this invention will be described. Figure 23 This is a side view of the anchor device 20 used in this experiment, shown in its folded state. Figure 24 This is a side view of the anchor device 20 in its unfolded state.

[0118] The anchor device 20 used in this experiment has a first inclined end face 33 and a second inclined end face 43. The first inner surface 35 of the first plate member 30 is parallel to the first outer surface 37. Additionally, the second inner surface 45 of the second plate member 40 is parallel to the second outer surface 47. The total length L of the first plate member 30 and the second plate member 40 along a direction orthogonal to the central axis A (refer to...) Figure 23 The thickness T of the first plate component 30 and the second plate component 40 is set to 40mm. Additionally, the direction parallel to the central axis A (and...) is set to... Figure 23 The depth of the first plate component 30 and the second plate component 40 on the paper (in the direction perpendicular to the paper surface) is set to 40mm.

[0119] like Figure 24 As shown, the angle between the first inner surface 35 and the second inner surface 45 during the unfolding process is set as θ. Additionally, Figure 24 The angle between the central axis of the tension member 85 and the first inner surface 35 is set as θ. L The angle between the central axis of the stretching member 85 and the second inner surface 45 is set as θ. R Angles θ, θ L and θ R All measurements were taken in a plane orthogonal to the central axis A.

[0120] A transparent foundation is created by mixing numerous quartz particles with a fluid having the same refractive index as the quartz particles. This transparent foundation simulates the subsurface layer G and is constructed in a way that allows the interior of the foundation to be observed from the outside. Figure 23 and Figure 24 The anchor device 20 shown is embedded in the foundation with the shaft member 22 positioned below it. Tensioning members 85 extending vertically are installed at both ends of the shaft member 22. While filming the anchor device 20 using a camera from the direction of the shaft member 22, the anchor device 20 is pulled upwards via the tensioning members 85. Figure 25 The figure shows the pull-out amount (mm) of the anchor device 20 and the unfolding angle θ of the anchor device 20 at this time. L θ R The relationship between (degrees). It should be noted that the pull-out amount (mm) is measured by measuring the vertical displacement of the component connected to the tensioning component 85 using a laser displacement gauge. The unfolding angles θ and θ' are measured based on images captured by a camera. L θ R(Spend).

[0121] according to Figure 25 The experimental results shown indicate that as the drawing amount increases, the unfolding angles θ and θ' increase... L θ R This also increases the efficiency. Specifically, it was confirmed that simply pulling the anchor device 20 upwards via the tension member 85 allows the anchor device 20 to be properly unfolded from its folded state. Additionally, the angle θ... L and angle θ R The anchor device 20 remains approximately the same size throughout the entire pulling process. Accordingly, it has been confirmed that by configuring the first plate member 30 and the second plate member 40 into a symmetrical shape and pulling the anchor device 20 in the same direction as the extending direction of the first plate member 30 and the second plate member 40 in the folded state, the first plate member 30 and the second plate member 40 can be unfolded approximately symmetrically.

[0122] Next, refer to Figures 26-28 Other experiments conducted by the inventors of this invention will be described. The anchor device 20 used in this experiment is based on… Figures 11-14 The anchor device 20 is described. θ is the unfolding angle between the first inner surface 35 and the second inner surface 45 during unfolding. θ2 is the angle between the inner surface 35 and the inclined outer surface 38, and the angle between the inner surface 45 and the inclined outer surface 48. θ3 is the angle between the inner surfaces 35 and 45 and the inclined end faces 33 and 43. Therefore, when angle θ3 = 90 degrees, the anchor device 20 and the reference... Figure 11 and Figure 12 The anchor device 20 described is the same. Furthermore, when the angle θ3 = 50 degrees to 80 degrees, the anchor device 20 is the same as the reference. Figure 13 and Figure 14 The anchor device 20 described is the same. Figure 26 It is a graph showing the relationship between the pull-out amount S (mm) of the anchor device 20 and the unfolding angle θ (degrees) when the angle θ2 of the anchor device 20 changes. Figure 27 This is a graph showing the relationship between the pull-out amount S (mm) of the anchor device 20 and the unfolding angle θ (degrees) when the angle θ2 of the anchor device 20 is fixed at 20 degrees and the angle θ3 is changed. Figure 28 This is a graph showing the relationship between angle θ3 when the angle θ2 of the anchor device 20 is fixed at 20 degrees and the pull-out amount S of the anchor device 20 in the unfolded and converged state.

[0123] Figure 26This represents the relationship between the pull-out amount S (mm) of the anchor device 20 when angle θ2 is changed to 0 degrees, 5 degrees, 10 degrees, 15 degrees, and 20 degrees, and angle θ3 is fixed at 90 degrees, and the unfolding angle θ (degrees) between the first inner surface 35 and the second inner surface 45 during unfolding. It should be noted that three pull-out tests were conducted for a combination of angles θ2 and θ3. According to... Figure 26 The experimental results show that, except for the case where angle θ2 = 0 degrees, as the pulling amount S increases, the unfolding angle θ also increases, and after a certain pulling amount (pulling amount S < 100 mm), it converges to an arbitrary angle. According to... Figure 26 It can be confirmed that the increase in the unfolding angle θ relative to the pull-out increment tends to increase as the angle θ2 increases. Furthermore, it is known that the reliability of unfolding (the probability that the unfolding angle θ > 120 degrees when the pull-out amount S < 100 mm) also increases as the angle θ2 increases. Specifically, it has been confirmed that when the angle θ2 = 20 degrees, simply pulling the anchor device 20 upwards via the tensioning member 85 is sufficient to reliably unfold the anchor device 20 from its folded state to a pull-out amount S < 80 mm.

[0124] Figure 27 This represents the relationship between the pull-out amount S (mm) of the anchor device 20 when angle θ2 is fixed at 20 degrees and angle θ3 is changed to 90 degrees, 80 degrees, 70 degrees, and 50 degrees, and the unfolding angle θ (degrees) between the first inner surface 35 and the second inner surface 45 during unfolding. It should be noted that three pull-out tests were conducted for a combination of angles θ2 and θ3. Based on... Figure 27 The experimental results show that, in all cases, as the pull-out amount S increases, the unfolding angle θ also increases, and the anchor device 20 reliably unfolds (when the pull-out amount S < 100 mm, the unfolding angle θ > 160 degrees). According to... Figure 27 It was confirmed that the final unfolding angle θ does not change significantly with angle θ3, but remains at 160 degrees < θ < 180 degrees. On the other hand, it was found that the increase in unfolding angle θ relative to the drawing increment tends to increase as angle θ3 decreases.

[0125] Figure 28 This is a summary of the relationship between the drawing amount S and the angle θ3 when the unfolding angle θ > 150 degrees, the increment of the angle θ3 relative to the increase in the drawing amount S is less than 1 degree / mm, and the unfolding convergence state is achieved. Based on... Figure 28 It was confirmed that reducing the angle θ3 to allow the anchor device 20 to deploy with less pull-out S helps improve workability.

[0126] Figure 29 This is a plan view showing an example of the installation position of the tension member 85 of the anchor device 20. Figure 30 It is represented in the folded state. Figure 29 Side view of anchor device 20.

[0127] exist Figure 29 and Figure 30 In the example shown, the tension member 85 is mounted at two points at both ends of the shaft member 22. More specifically, as... Figure 30 As shown, the tension member 85 is mounted at both ends of the shaft member 22 by rotating the mounting member 87. One end of the tension member 85 is fixed relative to the corresponding mounting member 87. The mounting member 87 can also be fixed to the shaft member 22 without rotating relative to the central axis A. Alternatively, the mounting member 87 can be mounted to the shaft member 22 in a manner that allows rotation about the central axis A.

[0128] Figure 31 This is a plan view showing another example of the installation position of the tension member 85 of the anchor device 20. Figure 31 In the example shown, the tension member 85 is mounted at a point in the middle of the shaft member 22. The tension member 85 can also be mounted via a reference... Figure 30 The mounting component 87 is mounted on the shaft component 22.

[0129] Figure 32 This is a plan view showing yet another example of the installation position of the tensioning component 85 of the anchor device. Figure 32 The anchor device 20 in the example shown is a reference. Figure 18 The anchor device 20 is described. The tension member 85 can also be referenced. Figure 30 The mounting component 87 is mounted on the shaft component 22.

[0130] Second Implementation Method Figure 33 This is a diagram illustrating the second embodiment of the present invention, and is a plan view showing an example of the anchor device 20 in its unfolded state. Figure 34 It is represented in the folded state. Figure 33 The diagram of anchor device 20 is related to... Figure 33 The sectional view corresponding to line AA. Figure 35 In the expanded state Figure 33 The diagram of anchor device 20 is related to... Figure 33 The cross-sectional view corresponding to line AA. In the second embodiment, for parts that can be constructed in the same way as in the first embodiment, the same reference numerals are used for the corresponding parts in the first embodiment, and repeated descriptions are omitted.

[0131] The anchoring device 20 includes a shaft component 22, a first frame component 130, a second frame component 140, a pressure-bearing component 110, and a limiting part 70. The first frame component 130 and the second frame component 140 have a generally frame-like shape. The shaft component 22 has a cylindrical shape and extends along a central axis A. The central axis A is the axis of rotation for the relative rotation of the first frame component 130 and the second frame component 140. The first frame component 130 and the second frame component 140 are respectively mounted on the shaft component 22. The first frame component 130 and the second frame component 140 are configured to rotate relative to each other about the central axis A.

[0132] The first frame member 130 has a first rear end portion 131. The first rear end portion 131 is the end of the first frame member 130 that is away from the central axis A. The second frame member 140 has a second rear end portion 141. The second rear end portion 141 is the end of the second frame member 140 that is away from the central axis A. The anchor device 20 of this embodiment is the same as that of the first embodiment, and is configured in a way that allows it to change from a folded state to an unfolded state.

[0133] exist Figure 34 In the example shown, the first frame component 130 and the second frame component 140 each have a shape that is bent in the middle. The first frame component 130 includes a first portion 130a and a second portion 130b. The first portion 130a and the second portion 130b are fixed to each other. That is, the angle between the first portion 130a and the second portion 130b is always constant. One end of the first portion 130a is rotatably connected to the shaft component 22, and the other end of the first portion 130a is fixed to the second portion 130b. One end of the second portion 130b is fixed to the other end of the first portion 130a, and the other end of the second portion 130b is a free end.

[0134] Furthermore, the second frame component 140 includes a first portion 140a and a second portion 140b. The first portion 140a and the second portion 140b are fixed to each other. That is, the angle between the first portion 140a and the second portion 140b is always constant. The angle between the first portion 140a and the second portion 140b in the second frame component 140 can be the same as or different from the angle between the first portion 130a and the second portion 130b in the first frame component 130. One end of the first portion 140a is rotatably connected to the shaft component 22, and the other end of the first portion 140a is fixed to the second portion 140b. One end of the second portion 140b is fixed to the other end of the first portion 140a, and the other end of the second portion 140b is a free end.

[0135] exist Figure 34In the folded state shown, the first portion 130a of the first frame member 130 and the first portion 140a of the second frame member 140 extend substantially parallel to each other. The second portion 130b of the first frame member 130 extends in a direction inclined relative to the first portion 130a as it moves away from the shaft member 22 and away from the second frame member 140. Similarly, the second portion 140b of the second frame member 140 extends in a direction inclined relative to the first portion 140a as it moves away from the shaft member 22 and away from the first frame member 130.

[0136] There are no particular limitations on the lengths of the first portion 130a and the second portion 130b of the first frame component 130, or the lengths of the first portion 140a and the second portion 140b of the second frame component 140. The lengths of the first portion 130a of the first frame component 130 and the first portion 140a of the second frame component 140 can be the same or different. Similarly, the lengths of the second portion 130b of the first frame component 130 and the second portion 140b of the second frame component 140 can be the same or different.

[0137] It should be noted that, not limited to this, the first frame component 130 and the second frame component 140 may not have a shape that bends in the middle. For example, the first frame component 130 and the second frame component 140 may also have a straight shape when viewed from the direction along the central axis A of the shaft component 22.

[0138] The first frame member 130 has a first inner surface 135 and a first outer surface 137. The first inner surface 135 is the surface opposite to the second frame member 140 in the folded state. The first outer surface 137 is the surface facing the opposite direction to the second frame member 140 in the folded state. The second frame member 140 has a second inner surface 145 and a second outer surface 147. The second inner surface 145 is the surface opposite to the first frame member 130 in the folded state. The second outer surface 147 is the surface facing the opposite direction to the first frame member 130 in the folded state. In the folded state, the first inner surface 135 and the second inner surface 145 are opposite to each other, and the first outer surface 137 and the second outer surface 147 face substantially opposite directions.

[0139] In this embodiment, a tension member 85 (not shown) is mounted on the shaft member 22. The tension member 85 can, for example, be configured as described in reference to... Figures 29-32 The example shown is installed in the same manner on shaft component 22.

[0140] The pressure-bearing member 110 is mounted on the first frame member 130 and the second frame member 140. The pressure-bearing member 110 functions to withstand the pressure exerted on the anchor device 20 from the ground layer G. The pressure-bearing member 110 is fixed relative to the first frame member 130 and the second frame member 140 at its periphery. Particularly preferably, the pressure-bearing member 110 is fixed relative to the first frame member 130 and the second frame member 140 along its entire periphery. In this embodiment, the pressure-bearing member 110 has a rectangular shape when viewed from above. In this case, all four sides of the pressure-bearing member 110 are fixed relative to the first frame member 130 and the second frame member 140.

[0141] The pressure-bearing member 110 is composed of a component capable of withstanding pressure from the foundation layer G. Such a pressure-bearing member 110 can be composed of a flexible component (flexible component) or a non-flexible component (non-flexible component). Flexible components can be, for example, sheet-like components or mesh-like components. Non-flexible components can be, for example, plate-like components.

[0142] The limiting part 70 in this embodiment includes connecting members 74. The connecting members 74 connect the first frame member 130 and the second frame member 140 to each other. In particular, in this embodiment, the limiting part 70 includes two connecting members 74.

[0143] The anchor system 80, including the anchor device 20 of this embodiment, is in accordance with the reference in the first embodiment. Figures 6-10 The setup method is the same as the one described above.

[0144] exist Figure 34 The anchor device 20 in its folded state is shown in the image. Figure 34 In the example shown, in the folded state, the first inner surface 135 and the second inner surface 145 are opposite to each other and close to each other. At this time, the pressure-bearing member 110 is folded between the first inner surface 135 and the second inner surface 145. The anchor device 20, in the folded state, is positioned from below (…). Figure 34 The projected area is smallest when observed from below.

[0145] Similar to the first embodiment, the anchor device 20 is positioned within the base layer G in its folded state. Next, the tensioning member 85 is stretched using the work vessel 16. As a result, the anchor device 20 unfolds. By stretching the tensioning member 85, the shaft member 22 is stretched. At this time, the soil and sand constituting the base layer G enter the space between the folded bearing members 110, and the first frame member 130 and the second plate member 140 separate from each other.

[0146] If the stretching member 85 is further stretched, the connecting member 74 elongates, and the angle θ1 between the first inner surface 135 and the second inner surface 145 becomes a specified angle (refer to...). Figure 35 At this point, the anchor device 20 is in the deployed state, that is, the anchor device 20 is in the state of maximum deployment. At this time, the pressure on the anchor device 20 from the ground layer G is applied to the pressure-bearing member 110 by stretching the tension member 85. That is, the pressure-bearing member 110 bears the pressure acting on the anchor device 20 from the ground layer G.

[0147] like Figure 34 As shown, when the first frame member 130 and the second frame member 140 each have a shape that bends in the middle portion, by stretching the tension member 85, the soil and sand constituting the base layer G enter the space between the first inner surface 135 and the second inner surface 145 along the second portion 130b of the first frame member 130 and / or the second portion 140b of the second frame member 140. Therefore, the anchor device 20 can be deployed with a smaller amount of displacement.

[0148] It should be noted that the angle θ1 between the first inner surface 135 and the second inner surface 145 in the unfolded state can also be set in the same way as θ1 in the first embodiment.

[0149] The anchor device 20 of this embodiment includes a shaft member 22 extending along a central axis A and on which a tension member 85 is mounted, a first frame member 130 and a second frame member 140 configured to be rotatable about the central axis A, and a pressure-bearing member 110 mounted on the first frame member 130 and the second frame member 140. The first frame member 130 has a first rear end 131, which is furthest from the central axis A in a direction orthogonal to the central axis A. The second frame member 140 has a second rear end 141, which is furthest from the central axis A in a direction orthogonal to the central axis A. The anchor device 20 is configured to change from a folded state in which the first rear end 131 and the second rear end 141 are close together to an unfolded state in which the first rear end 131 and the second rear end 141 are separated.

[0150] With this type of anchor device 20, the anchor device 20 can be inserted into the ground layer G in a folded state with the smallest projected area when viewed from below. This significantly reduces the resistance experienced by the anchor device 20 from the ground layer G. Therefore, the anchor device 20 can be installed in the ground layer G without using large ships or large construction machinery. Furthermore, the anchor device 20 has the largest projected area when viewed from the direction opposite to the tension member 85 in the unfolded state. Therefore, when the tension member 85 is stretched in the unfolded state, the anchor device 20 generates a large holding force. In other words, with this type of anchor device 20, the anchor device 20 can be easily installed in the ground layer G, and it can exert a large holding force after installation.

[0151] The anchor device 20 of this embodiment has a limiting part 70, which limits the angle between the first frame member 130 and the second frame member 140 to a predetermined angle or less when the device is in the unfolded state.

[0152] In the anchor device 20 of this embodiment, the limiting part 70 includes a connecting member 74, which connects the first frame member 130 and the second frame member 140 to each other.

[0153] With such an anchor device 20, the angle between the first frame member 130 and the second frame member 140 can be limited to a predetermined angle or less. Therefore, the angle between the first frame member 130 and the second frame member 140 can be predetermined in a way that allows the anchor device 20 to exert a greater holding force while it is installed within the subgrade G.

[0154] Figure 36 This is a plan view showing another example of the anchor device 20 of the second embodiment in its unfolded state. Figure 37 It is represented in the folded state. Figure 36 The diagram of anchor device 20 is related to... Figure 36 The sectional view corresponding to the BB line. Figure 38 In the expanded state Figure 36 The diagram of anchor device 20 is related to... Figure 36 The sectional view corresponding to the BB line.

[0155] exist Figures 36-38 In the example shown, the anchor device 20 also includes a third frame component 150 and a fourth frame component 160. The pressure-bearing component 110 is mounted on the first frame component 130, the second frame component 140, the third frame component 150, and the fourth frame component 160.

[0156] The third frame member 150 is connected to the first frame member 130 and is configured to rotate relative to the first frame member 130. Specifically, the third frame member 150 is configured to rotate relative to the first frame member 130 about a rotation axis 152. The rotation axis 152 has a central axis extending parallel to the central axis A. The rotation axis 152 is the axis of rotation for relative rotation between the first frame member 130 and the third frame member 150.

[0157] The fourth frame member 160 is connected to the second frame member 140 and is configured to rotate relative to the second frame member 140. Specifically, the fourth frame member 160 is configured to rotate relative to the second frame member 140 about a rotation axis 162. The rotation axis 162 has a central axis extending parallel to the central axis A. The rotation axis 162 is the axis of rotation for relative rotation between the second frame member 140 and the fourth frame member 160.

[0158] exist Figure 37 and Figure 38 In the example shown, the third frame member 150 has a pointed shape whose thickness decreases with distance from the rotation axis 152. Additionally, the fourth frame member 160 has a pointed shape whose thickness decreases with distance from the rotation axis 162. Specifically, in... Figure 37 In the folded state shown, the inner surface 151 of the third frame member 150 extends in an inclined direction, moving away from the rotation axis 152 and away from the fourth frame member 160. Similarly, in the folded state, the inner surface 161 of the fourth frame member 160 extends in an inclined direction, moving away from the rotation axis 162 and away from the third frame member 150. It should be noted that this is not a limitation; the third frame member 150 may also have a fixed thickness regardless of its distance from the rotation axis 152. Likewise, the fourth frame member 160 may also have a fixed thickness regardless of its distance from the rotation axis 162.

[0159] exist Figures 36-38 In the example shown, the length of the third frame member 150 in the folded state, along the direction orthogonal to the central axis A, can be smaller than the length of the first frame member 130. Furthermore, in the folded state, the length of the fourth frame member 160 in the direction orthogonal to the central axis A is less than the length of the second frame member 140. The rotation angle of the third frame member 150 relative to the first frame member 130 can also be limited to a predetermined angle. Similarly, the rotation angle of the fourth frame member 160 relative to the second frame member 140 can also be limited to a predetermined angle.

[0160] There are no particular restrictions on the lengths of the first frame component 130, the second frame component 140, the third frame component 150, and the fourth frame component 160. The lengths of the first frame component 130 and the second frame component 140 can be the same or different. Similarly, the lengths of the third frame component 150 and the fourth frame component 160 can be the same or different.

[0161] The third frame member 150 and the fourth frame member 160 in this embodiment function in the same way as the third plate member 50 and the fourth plate member 60 in the first embodiment, therefore, detailed description is omitted.

[0162] The anchor device 20 in this modified example further includes a third frame member 150 and a fourth frame member 160. The third frame member 150 is connected to the first frame member 130 and is configured to rotate relative to the first frame member 130. The fourth frame member 160 is connected to the second frame member 140 and is configured to rotate relative to the second frame member 140.

[0163] According to this anchoring device 20, when the tensioning member 85 is stretched, the third frame member 150 and the fourth frame member 160 are rotated relative to the first frame member 130 and the second frame member 140 with a small force. This allows the soil and sand constituting the subgrade G to easily enter the space between the folded bearing members 110. Guided by the portions of the bearing members 110 that overlap with the third frame member 150 and the fourth frame member 160, the soil and sand entering the space between the portions overlapping with the first frame member 130 and the second frame member 140. This allows the anchoring device 20 to be easily deployed.

[0164] In particular, such as Figure 37 As shown, when the inner surface 151 of the third frame member 150 and / or the inner surface 161 of the fourth frame member 160 extend in an inclined direction in the folded state, by stretching the tension member 85, the soil and sand constituting the base layer G enter the space between the first inner surface 135 and the second inner surface 145 of the inner surface 151 of the third frame member 150 and / or the inner surface 161 of the fourth frame member 160. Therefore, the anchor device 20 can be deployed more easily.

[0165] Figure 39 This is a plan view showing another example of the anchor device 20 of the second embodiment in its unfolded state. Figure 40 It is represented in the folded state. Figure 39 The diagram of anchor device 20 is related to... Figure 39 The sectional view corresponding to the CC line. Figure 41 In the expanded state Figure 39The diagram of anchor device 20 is related to... Figure 39 The sectional view corresponding to the CC line.

[0166] In this variation, compared with the reference Figures 33-35 Compared to the illustrated example, the difference lies in that the pressure-bearing member 110 is constructed by combining flexible and non-flexible members. In particular, in this modified example, a portion of the pressure-bearing member 110 near the shaft member 22 is formed by a flexible member, while a portion away from the shaft member 22 is formed by a non-flexible member.

[0167] With this type of anchor device 20, the anchor device 20 can be inserted into the ground layer G in a folded state with the smallest projected area when viewed from below. This significantly reduces the resistance experienced by the anchor device 20 from the ground layer G. Therefore, the anchor device 20 can be installed into the ground layer G without using large vessels or large construction machinery. Furthermore, the anchor device 20 has the largest projected area when viewed from the direction opposite to the tension member 85 in the unfolded state. Therefore, when the tension member 85 is stretched in the unfolded state, the anchor device 20 generates a large holding force. In other words, with this type of anchor device 20, the anchor device 20 can be easily installed into the ground layer G, and it can exert a large holding force after installation.

[0168] Figure 42 This is a top view showing an example of the configuration of the wind power generation device 10 and the anchor system 80.

[0169] exist Figure 42 In the example shown, multiple wind power generation devices 10 and multiple anchor devices 20 are configured. One wind power generation device 10 is fixed to the ground layer G by multiple anchor devices 20. In addition, one anchor device 20 fixes multiple wind power generation devices 10 to the ground layer G.

[0170] In most conventional anchoring devices, the embedment portion of the anchoring device into the ground layer G is stretched in a manner deviating from the horizontal direction. Therefore, it is sometimes unable to provide sufficient anchoring function against tensile forces from multiple directions. In contrast, in this invention, the anchoring device 20 is stretched in the embedment portion into the ground layer G by stretching the stretching member 85, thereby unfolding the anchoring device 20. The bearing surface of the anchoring device 20 extends substantially perpendicular to the extending direction of the stretching member 85. Thus, when the stretching member 85 is stretched, the bearing surface of the anchoring device 20 extends substantially perpendicular to the extending direction of the stretching member 85, and the anchoring device 20 can be positioned in any location. Therefore, the anchoring device 20 of this invention can provide excellent performance against tensile forces from multiple directions.

Claims

1. An anchoring device comprising: A shaft component extending along a central axis and fitted with a tensioning member; and The first plate component and the second plate component are configured to rotate about the central axis. The first plate component has a first rear end portion, which is furthest from the central axis in the extending direction of the first plate component and in a direction orthogonal to the central axis. The second plate component has a second rear end portion, which is furthest from the central axis in the extending direction of the second plate component and in a direction orthogonal to the central axis. The anchor device is configured to change from a folded state where the first rear end and the second rear end are close together to an unfolded state where the first rear end and the second rear end are separated.

2. The anchoring device according to claim 1, wherein, The first plate component has a first outer surface, which faces in the folded state in a direction opposite to that of the second plate component. The second plate component has a second outer surface, which faces in the folded state in a direction opposite to that of the first plate component. The first outer surface includes a first inclined outer surface, which, in the folded state, approaches the second plate component as it moves closer to the shaft component. The second outer surface includes a second inclined outer surface, which, in the folded state, approaches the first plate component as it moves closer to the shaft component.

3. The anchoring device according to claim 1, wherein, The first rear end portion includes a first inclined end face, which, in the folded state, approaches the second plate component as it moves closer to the shaft component. The second rear end portion includes a second inclined end face, which, in the folded state, approaches the first plate component as it approaches the shaft component.

4. The anchoring device according to claim 1, wherein, The anchoring device also includes: A third plate component is connected to the first plate component and is configured to rotate relative to the first plate component. The fourth plate component is connected to the second plate component and is configured to rotate relative to the second plate component.

5. The anchoring device according to claim 1, wherein, The anchor device has a limiting part that, in the deployed state, limits the angle between the first plate component and the second plate component to below a predetermined angle.

6. The anchoring device according to claim 5, wherein, The limiting part includes a contact part, which makes contact with each other when the angle between the first plate component and the second plate component is the predetermined angle.

7. The anchoring device according to claim 5, wherein, The limiting part includes a connecting member that connects the first plate member and the second plate member to each other.

8. An anchoring device comprising: A shaft component that extends along a central axis and is fitted with a tensioning component; A first frame component and a second frame component, the first frame component and the second frame component being configured to rotate relative to each other about the central axis; and The pressure-bearing component is mounted on the first frame component and the second frame component. The first frame component has a first rear end portion, which is furthest from the central axis in a direction orthogonal to the central axis. The second frame component has a second rear end portion, which is furthest from the central axis in a direction orthogonal to the central axis. The anchor device is configured to change from a folded state where the first rear end and the second rear end are close together to an unfolded state where the first rear end and the second rear end are separated.

9. The anchoring device according to claim 8, wherein, The anchoring device also includes: A third frame member, which is connected to the first frame member and configured to rotate relative to the first frame member; and... A fourth frame component, which is connected to the second frame component and configured to be rotatable relative to the second frame component.

10. The anchoring device according to claim 8, wherein, The anchor device has a limiting part that, in the unfolded state, limits the angle between the first frame component and the second frame component to a predetermined angle or less.

11. The anchoring device according to claim 10, wherein, The limiting part includes a connecting member that connects the first frame member and the second frame member to each other.

12. An anchoring system, comprising: The anchoring device according to any one of claims 1 to 11; and A tensioning component, which is mounted on the shaft component.

13. A method for setting up an anchor system, comprising: The process of configuring the anchor device of the anchor system according to claim 12 in the folded state within the subgrade; and The process of changing the anchor device from the folded state to the unfolded state by stretching the stretching member.

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