Seismic damping structure for tower-like structures and method for constructing tower-like structures with seismic damping structures

Abstract

To provide a vibration control structure of a tower-like structure capable of improving vibration-damping properties overall a tower-like structure such as offshore wind power generation equipment while reducing the load to a cylindrical foundation of a monopile foundation such as offshore wind power generation equipment due to earthquake motion, etc., and a construction method of a tower-like structure with vibration control structure.SOLUTION: A vibration control structure 8 of a tower-like structure 3 includes a cylindrical seismic damping pile 10 penetrated into the underwater ground 1 within cylindrical foundation 4, which has a predetermined natural frequency. A ground spring section 11 of underwater ground 1 is formed between the outer circumferential surface of the damping pile body 10 and the inner circumferential surface of the cylindrical foundation 4.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a seismic isolation structure for a tower-like structure such as an offshore wind power generation device and a method for constructing a tower-like structure with a seismic isolation structure.

Background Art

[0002] One aspect of offshore wind power generation facilities includes a monopile foundation composed of a cylindrical body for foundation penetrated into the seabed ground, and a tower main body portion whose lower end is supported by the cylindrical body for foundation, and a wind power generation device composed of a windmill (nacelle · rotor) etc. is supported at the upper end portion of the tower main body portion (for example, refer to Patent Document 1).

[0003] The monopile foundation is widely used as the foundation of a fixed-type offshore wind power generation device in Europe etc. because it is general and inexpensive, but in Japan where earthquakes occur frequently, the influence of seismic motion on the monopile foundation serving as its foundation is large. Especially when installed in waters with a large water depth, there is a risk that large deformation may occur in the monopile foundation due to seismic motion, so the design of this type of tower-like structure is carried out strictly.

[0004] That is, in this type of tower-like structure, the lower part is penetrated and supported by the ground, and a large bending moment and shear force act during an earthquake etc. Therefore, in order to ensure safety, it is necessary to increase the outer diameter and wall thickness of the monopile which is the foundation part of the tower-like structure in advance so as to be able to resist the bending moment and shear force.

Prior Art Documents

Patent Documents

[0005]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0006] However, with the conventional technology described above, there is a problem in that the manufacturing cost and construction cost of the monopile, which is the foundation of the tower-like structure, increase as the outer diameter and wall thickness of the monopile increase.

[0007] Furthermore, as monopiles become larger, it becomes necessary to use special work vessels for handling and driving them into the ground. Additionally, driving the monopiles takes more time, leading to increased costs, longer construction periods, and higher safety risks in the construction of monopil foundations.

[0008] In particular, monopile foundations, being single-pile foundations, can generate excessive loads due to resonance with the ground depending on the soil conditions. However, because of their simple structure and shape, it is difficult to reduce seismic loads through design modifications such as shape adjustments, which carries the risk of excessive design strength or foundation shape.

[0009] Therefore, in order to mitigate the increased costs, longer construction periods, and safety risks associated with the construction of monopile foundations due to the increasing size of monopiles, it is desirable to reduce the stress burden on tower-like structures caused by seismic activity and to reduce the outer diameter and wall thickness of the monopiles.

[0010] Therefore, in view of these conventional problems, the present invention aims to provide a seismic damping structure for tower-like structures and a method for constructing a tower-like structure with a seismic damping structure that can improve the seismic damping performance of the entire tower-like structure such as offshore wind power generation facilities and reduce the load on the cylindrical foundation body such as monopile foundations of offshore wind power generation facilities caused by seismic motion and the like. [Means for solving the problem]

[0011] The invention described in claim 1, which solves the conventional problems described above, is a seismic damping structure for a tower-like structure having a hollow cylindrical foundation body erected on the submarine ground while penetrating the submarine ground, wherein the foundation body is provided with a cylindrical seismic damping pile body having a predetermined natural frequency that is penetrating the submarine ground, and a ground spring portion made of the submarine ground is formed between the outer surface of the seismic damping pile body and the inner surface of the foundation body.

[0012] The feature of the invention described in claim 2 is that, in addition to the configuration of claim 1, the seismic damping pile body is filled with a natural frequency adjustment material to a predetermined height inside.

[0013] The feature of the invention described in claim 3 is that, in addition to the configuration of claim 1 or 2, the seismic damping pile body has a weight for adjusting the natural frequency fixed to the inner and / or outer circumferential surface at a predetermined height from the seabed ground.

[0014] The feature of the invention described in claim 4 is that, in addition to the configuration of claim 1 or 2, it is provided with a seismic damping connecting member that connects the inner surface of the tower-like structure and the outer surface of the seismic damping pile body at a predetermined height from the seabed ground.

[0015] The features of the invention described in claim 5 are, in addition to the configuration of claim 4, the inner circumferential surface of the tower-like structure and The aforementioned seismic damping pile body A connector is fixed to the outer surface of the device, to which the end of the seismic damping connecting member is detachably connected, and both ends of the seismic damping connecting member are each connected to the connector.

[0016] The features of the invention described in claim 6 are a method for constructing a tower-like structure with a seismic damping structure having a hollow cylindrical foundation body erected on the submarine ground in a state where it is penetrated into the submarine ground, comprising: a foundation body erection step of erecting the foundation cylindrical body in a state where it is penetrated into the submarine ground; and a seismic damping pile driving step of inserting a cylindrical seismic damping pile body into the foundation cylindrical body from the upper end opening and driving the pile body into the submarine ground within the foundation cylindrical body, wherein a ground spring portion made of the submarine ground is formed between the outer surface of the seismic damping pile body having a predetermined natural frequency and the inner surface of the foundation cylindrical body.

[0017] The features of the invention described in claim 7 are, in addition to the configuration of claim 6, that after the seismic damping pile is driven into the seabed ground, a natural frequency adjustment filling material is filled into the seismic damping pile to a predetermined height to adjust the natural frequency of the seismic damping pile.

[0018] The feature of the invention described in claim 8 is that, in addition to the configuration of claim 6 or 7, a weight for adjusting the natural frequency is fixed to a predetermined position on the inner and / or outer surface of the seismic damping pile, and the seismic damping pile is driven into the ground so that the weight for adjusting the natural frequency is located at a predetermined height from the seabed.

[0019] The feature of the invention described in claim 9 is that, in addition to the configuration of claim 6 or 7, after the seismic damping pile body is driven into the seabed ground, the inner surface of the tower-like structure and the outer surface of the seismic damping pile body are connected by a seismic damping connecting member at a predetermined height from the seabed ground.

[0020] The features of the invention described in claim 10 are, in addition to the configuration of claim 9, The tower-like structure The inner circumferential surface and The aforementioned seismic damping pile body The method involves fixing a connector to the outer surface of the device, to which the end of the seismic damping connecting member is detachably connected, and connecting both ends of the seismic damping connecting member to the connector. [Effects of the Invention]

[0021] The seismic isolation structure of the tower-like structure according to the present invention can reduce the load on the entire tower-like structure by the seismic isolation effect due to the interaction through the ground spring portion of the seismic isolation pile body by having the configuration described in claim 1. Further, by reducing the load on the entire tower-like structure, the sectional force acting on the tower-like structure during an earthquake can be reduced, and accordingly, the outer diameter and wall thickness of the foundation cylindrical body such as a monopile can be reduced.

[0022] Also, in the present invention, by having the configuration described in claims 2 to 3, the seismic isolation pile body can be adjusted to a natural frequency suitable for seismic isolation.

[0023] Furthermore, in the present invention, by having the configuration described in claim 4, in addition to the seismic isolation effect due to the interaction through the ground spring portion of the seismic isolation pile body, the energy generated by seismic motion or the like in the tower-like structure can be absorbed by the seismic isolation connecting member, and the seismic isolation effect can be enhanced.

[0024] Moreover, in the present invention, by having the configuration described in claim 5, the tower-like structure and the pile support structure can be easily and efficiently connected.

[0025] In the present invention, by having the configuration described in claim 6, the seismic isolation structure can be constructed so as to reduce the load on the entire tower-like structure by the seismic isolation effect due to the interaction through the ground spring portion of the seismic isolation pile body.

[0026] Also, in the present invention, by having the configuration described in claims 7 to 8, the seismic isolation pile body can be adjusted to a natural frequency suitable for seismic isolation.

[0027] Furthermore, in the present invention, by having the configuration described in claims 9 to 10, the tower-like structure and the seismic isolation pile body can be easily and efficiently connected, and the seismic isolation effect can be improved by the seismic isolation connecting member.

Brief Description of the Drawings

[0028] [Figure 1] This is a front view showing an embodiment of the seismic damping structure for a tower-like structure according to the present invention. [Figure 2] This is a partially enlarged longitudinal section showing the seismic damping structure portion of the same structure. [Figure 3] This is a partially enlarged longitudinal section showing another aspect of the seismic damping structure described above. [Figure 4] This is a partially enlarged longitudinal section showing yet another aspect of the seismic damping structure shown above. [Figure 5] This is an enlarged cross-sectional view taken along line AA in Figure 4. [Figure 6] This is a partially enlarged longitudinal section showing yet another aspect of the seismic damping structure shown above. [Figure 7] This is an enlarged cross-sectional view taken along the line BB in Figure 6. [Figure 8] This is a partially enlarged longitudinal cross-sectional view showing the state after the cylindrical foundation body has been cast during the tower structure erection process in the method for constructing a tower-like structure with a seismic damping structure according to the present invention. [Figure 9] This is a partially enlarged longitudinal cross-sectional view showing the state of the seismic damping pile driving process described above. [Figure 10] This is a partially enlarged longitudinal cross-sectional view showing the state after the seismic damping piles mentioned above have been driven into the ground. [Figure 11] This is a partially enlarged longitudinal cross-sectional view showing the same seismic damping pile body as above, with its natural frequency adjusted. [Figure 12] This is a partially enlarged longitudinal cross-sectional view showing the same connecting cylindrical body connected to the base cylindrical body. [Modes for carrying out the invention]

[0029] Next, an embodiment of the seismic damping structure for a tower-like structure according to the present invention will be described based on the example shown in Figures 1 to 7. In the figures, reference numeral 1 denotes the ground such as bedrock, and reference numeral 2 denotes the water surface. Furthermore, this embodiment will be described using a monopile-type offshore wind power generation facility 3 as an example of a tower-like structure.

[0030] As shown in Figure 1, the offshore wind power generation facility 3 comprises a cylindrical foundation body 4 (monopile foundation) erected on the seabed 1 while being penetrated into the seabed 1, a hollow cylindrical tower body 6 connected to the upper end of the cylindrical foundation body 4 via a connecting cylindrical body 5 (transition piece), and a wind turbine facility 7 (nacelle and rotor) supported at the upper end of the tower body 6. The cylindrical foundation body 4, the connecting cylindrical body 5, and the tower body 6 form a tower shape.

[0031] The foundation cylindrical body 4 is made of steel pipe or the like and comprises a cylindrical main body portion 4a with open upper and lower ends, and a frustoconical connecting portion 4b that tapers towards the top and is integrally formed at the upper end of the main body portion 4a, with the skirt portion 5a of the connecting cylindrical body 5 fitted to the outside of the connecting portion 4b.

[0032] Furthermore, the form of the cylindrical base body 4 is not limited to a cylindrical shape; for example, it may be a polygonal cylinder or the like.

[0033] As shown in Figures 1 and 2, the cylindrical foundation body 4 is driven into the water with its lower end penetrating the seabed ground 1 to a predetermined depth and its upper end protruding above the water surface 2 by a predetermined height, and the connecting cylindrical body 5 is connected to it above the water surface. The height to which the cylindrical foundation body 4 protrudes from the seabed ground 1 is not limited to the above embodiment; for example, the upper end of the cylindrical foundation body 4 may be submerged in water when it is connected to the connecting cylindrical body 5.

[0034] Furthermore, this tower-like structure, the offshore wind power generation facility 3 (hereinafter referred to as "tower-like structure 3"), is equipped with a seismic damping structure 8, which reduces the burden caused by external forces such as earthquakes.

[0035] This seismic damping structure 8 includes a cylindrical seismic damping pile body 10 having a predetermined natural frequency that is driven into the submerged ground 1 within the cylindrical foundation body 4. A ground spring section 11 made of the submerged ground 1 is formed between the outer surface of the seismic damping pile body 10 and the inner surface of the cylindrical foundation body 4. The seismic damping pile body 10 exerts a seismic damping effect through interaction via the ground spring section 11, thereby reducing external forces such as seismic motion acting on the tower-like structure 3.

[0036] The seismic damping pile body 10 is constructed from steel pipe or the like in a cylindrical shape, with a diameter smaller than the upper opening diameter of the cylindrical foundation body 4. The lower part is driven into the seabed ground 1 to a predetermined depth, and the upper part is driven out of the seabed ground 1 by a predetermined height.

[0037] Furthermore, the configuration of the seismic damping pile 10 is not limited to the cylindrical shape shown in the above-described embodiment, but may also be, for example, a polygonal cylindrical shape.

[0038] The penetration depth of the seismic damping pile 10 into the submarine ground 1 is set based on prior analysis results, and is penetrated to a length at least long enough for the seismic damping pile 10 to stand upright on the submarine ground 1. Depending on the ground conditions, natural frequency, etc., the penetration depth may be deeper or shorter than that of the foundation cylindrical body 4.

[0039] Then, when the seismic damping pile body 10 is driven into the submerged ground 1 within the cylindrical foundation body 4, as shown in Figure 2, a ground spring section 11 is formed between the inner surface of the cylindrical foundation body 4, which has penetrated into the submerged ground 1, and the outer surface of the seismic damping pile body 10, by the soil and sand constituting the submerged ground 1, which has a certain width and depth.

[0040] The ground spring section 11 exhibits elasticity when the soil constituting the seabed ground 1 is sandwiched between the inner surface of the foundation cylindrical body 4 and the outer surface of the seismic damping pile body 10. This behaves like a spring interposed between the inner surface of the foundation cylindrical body 4 and the outer surface of the seismic damping pile body 10, forming a structure in which the foundation cylindrical body 4 and the seismic damping pile body 10 interact with each other.

[0041] Furthermore, in order to obtain the desired effect of a ground spring, the original ground inside the cylindrical foundation body 4 may be improved before the installation of the seismic damping pile body 10. The method of ground improvement is not particularly limited, but for example, the soil constituting the original ground may be mixed with ground improvement materials such as cement or steel slag, or the soil constituting the original ground may be replaced with another material.

[0042] Furthermore, in order to adjust the seismic damping pile body 10 to a natural frequency suitable for seismic damping, as shown in Figure 2, a natural frequency adjustment filler 12 may be filled inside the seismic damping pile body 10 to a predetermined height, and as shown in Figure 3, a natural frequency adjustment weight 13 may be fixed to the inner and / or outer circumferential surface of the seismic damping pile body 10 at a predetermined height from the seabed ground 1. Note that the natural frequency adjustment filler 12 and the natural frequency adjustment weight 13 may be used in combination.

[0043] The natural frequency adjustment filler 12 is made of concrete, mortar, or the like, and the weight and center of gravity of the seismic damping pile 10 change depending on the amount of filler, thereby adjusting the natural frequency. The natural frequency adjustment filler 12 is not limited to concrete or mortar, but may also be made of sand, soil, improved soil, steelmaking slag, etc. Furthermore, it is desirable to set the amount of filler 12 according to the material used as the natural frequency adjustment filler 12.

[0044] The form of the weight body 13 for adjusting the natural frequency is not particularly limited, but for example, a material having a constant weight such as a steel plate is used, and the moment acting on the seismic damping pile body 10 changes depending on its mounting position and weight, thereby adjusting the natural frequency.

[0045] Furthermore, as shown in Figures 4 to 7, this seismic damping structure 8 can further improve its seismic damping effect by ensuring a sufficient protrusion length of the seismic damping pile body 10 from the seabed surface 1 and by providing seismic damping connecting members 14, 14… at a predetermined height from the seabed ground 1 that connect the inner surface of the tower-like structure 3 and the outer surface of the seismic damping pile body 10.

[0046] Regarding the mounting positions of the seismic damping connecting members 14, 14, any position on the inner circumferential surface of the tower-like structure 3 may be appropriately selected, and as shown in Figures 4 and 5, the inner circumferential surface of the foundation cylindrical body 4 may be connected to the outer circumferential surface of the seismic damping pile body 10, and as shown in Figures 6 and 7, the inner circumferential surface of the connecting cylindrical body 5 and Seismic damping pilesThe outer surface of 10 may be connected to it. Alternatively, multiple seismic damping connecting members 14, 14 may be arranged vertically in multiple stages, and the seismic damping pile body 10 and both the foundation cylindrical body 4 and the connecting cylindrical body 5 may be connected by the seismic damping connecting members 14, 14.

[0047] As shown in Figure 5, the seismic damping connecting members 14, 14... are composed of dampers that absorb shock by expansion and contraction, such as oil dampers and air dampers, and both ends are connected to the outer surface of the seismic damping pile body 10 and the inner surface of the tower-like structure 3 (foundation cylindrical body 4 in the embodiment shown in Figures 4 and 5, and connecting cylindrical body 5 in the embodiment shown in Figures 6 and 7).

[0048] Furthermore, the configuration of the seismic damping connecting member 14 is not limited to the above-described embodiment. For example, instead of a damper, a spring material or seismic isolation rubber such as laminated rubber may be used.

[0049] Furthermore, connectors 15, 15… are fixed to the outer surface of the seismic damping pile body 10 and the inner surface of the tower-like structure 3 (foundation cylindrical body 4 in the embodiment of Figures 4 and 5, and connecting cylindrical body 5 in the embodiment of Figures 6 and 7), and the ends of the seismic damping connecting members 12, 12… are detachably connected to the connectors 15, 15….

[0050] The configuration of the connecting members 15, 15… is not particularly limited, but it is preferable that they include, for example, a pair of bearing plates facing each other in the vertical direction and a pivot shaft member that penetrates between the two bearing plates, and that the ends of the vibration-damping connecting members are pivotally supported on the two bearing plates via the pivot shaft member so that they can rotate.

[0051] As shown in Figure 5, each seismic damping connecting member 14, 14... is positioned at a horizontal inclination so as to form a predetermined angle with the diametrical direction of the cylindrical foundation body 4, thereby ensuring the stroke of the damper.

[0052] Next, the construction method of the seismic-damping tower structure 3 according to the present invention will be described with reference to Figures 8 to 12. Components similar to those in the above-described embodiment are denoted by the same reference numerals and their descriptions are omitted.

[0053] First, the cylindrical foundation body 4 is erected by penetrating it into the ground 1 based on existing construction methods.

[0054] Specifically, although not shown in the diagram, first, the cylindrical foundation structures 4, such as monopiles, manufactured at onshore factories or manufacturing yards, are transported to the base port, where they are loaded onto the SEP vessel (hereinafter referred to as a SEP vessel) using its crane.

[0055] Next, the cylindrical foundation body 4 is loaded onto a SEP vessel and transported by sea to the installation area. At the installation area, the legs of the SEP vessel are lowered and allowed to settle on the seabed, and the main body of the SEP vessel, supported by the legs, is raised above the water to stabilize the main body of the SEP vessel against waves and other elements.

[0056] Next, the foundation cylindrical body 4 loaded on the SEP vessel is lifted upright using the SEP vessel's crane, and the foundation cylindrical body 4 is gripped with a pile gripper or the like in a state where it can slide vertically, and in that state is lowered to the seabed ground 1 and placed on the bottom.

[0057] Then, the top of the cylindrical foundation body 4, which has been placed on the seabed ground 1, is driven into the ground with a hammer or the like, and the cylindrical foundation body 4 is installed by penetrating it into the seabed ground 1 as shown in Figure 8 (installation process of cylindrical foundation body 4).

[0058] Next, as shown in Figure 9, the seismic damping pile 10 is inserted through the upper end opening of the foundation cylindrical body 4, its lower end is placed on the seabed ground 1, and its position is adjusted as needed so that the seismic damping pile 10 is concentric with the foundation cylindrical body 4.

[0059] Furthermore, when using the natural frequency adjustment weight 13, it is desirable to insert it into the foundation cylindrical body 4 and then attach the natural frequency adjustment weight 13 to a predetermined position in the vertical or circumferential direction of the seismic damping pile body 10.

[0060] Next, as shown in Figures 9 to 10, the upper surface of the seismic damping pile body 10, which has been placed on the seabed ground 1, is struck with pliers 16 or the like, and the seismic damping pile body 10 is driven into the ground inside the cylindrical foundation body 4 to a predetermined penetration depth.

[0061] At that time, by penetrating the seismic damping pile body 10 into the ground inside the cylindrical foundation body 4 to a predetermined penetration depth, soil and sand are drawn into the interior of the seismic damping pile body 10 and the space between the seismic damping pile body 10 and the cylindrical foundation body 4, resulting in a state where soil and sand are filled into the portion of the seismic damping pile body 10 that has penetrated the submerged ground 1 and the space between the seismic damping pile body 10 that has penetrated the submerged ground 1 and the cylindrical foundation body 4.

[0062] Then, if necessary, the upper surface of the submerged ground 1 that forms the ground spring section 11 is compacted, forming the ground spring section 11 between the seismic damping pile body 10 and the cylindrical foundation body 4.

[0063] Then, as shown in Figure 11, the natural frequency adjustment filler material 12 is filled into the seismic damping pile body 10 to a predetermined position as needed, thereby adjusting the natural frequency of the seismic damping pile body 10.

[0064] Although not specifically shown in the diagram, when connecting the foundation cylindrical body 4 and the seismic damping pile body 10 with seismic damping connecting members 14, 14..., after the seismic damping pile body 10 is driven into the ground, both ends of the seismic damping connecting members 14, 14... are connected to the inner surface of the foundation cylindrical body 4 and the outer surface of the seismic damping pile body 10.

[0065] At that time, connectors 15, 15… are attached to the inner surface of the cylindrical foundation body 4 and the outer surface of the seismic damping pile body 10 at predetermined height positions, and both ends of the seismic damping connecting members 14, 14… are attached so that they can be detachably attached.

[0066] Next, as shown in Figure 12, the skirt portion 5a of the connecting cylindrical body 5 is fitted into the connecting portion 4b of the foundation cylindrical body 4, and after adjusting the circumferential position, grout is injected from below into the gap between the outer surface of the foundation cylindrical body 4 and the inner surface of the connecting cylindrical body 5 to fix them in place.

[0067] Although not specifically shown in the diagram, when connecting the connecting cylindrical body 5 and the seismic damping pile body 10 with seismic damping connecting members 14, 14..., after the seismic damping pile body 10 is driven into the ground, the connecting cylindrical body 5 is fixed to the foundation cylindrical body 4, and then both ends of the seismic damping connecting members 14, 14... are connected to the inner surface of the connecting cylindrical body 5 and the outer surface of the seismic damping pile body 10.

[0068] At that time, connecting devices 15, 15… are attached to the inner surface of the connecting cylindrical body 5 and the outer surface of the seismic damping pile body 10 at predetermined height positions, and both ends of the seismic damping connecting members 14, 14… are attached so that they can be detachably attached.

[0069] Next, once the construction of the seismic isolation structure 8 is complete, the tower body 6 and the wind turbine equipment 7 (nacelle, rotor, etc.) are transported to the construction area. The tower body 6 is then lifted by a crane ship or the like, and the lower end of the tower body 6 is connected to the foundation cylindrical body 4 via the connecting cylindrical body 5. After that, the wind turbine equipment 7 is attached, and the tower structure 3 is constructed. The wind turbine equipment 7 may be attached to the tower body 6 in advance.

[0070] In this configuration, the seismic damping structure of the tower-like structure 3 controls vibrations through interaction between the tower-like structure 3 and the seismic damping pile body 10, which have different natural frequencies, via the ground spring section 11 made of the submerged ground 1, thereby reducing the load on the entire tower-like structure 3.

[0071] Furthermore, by using dampers or elastic materials such as rubber in the seismic damping connecting members 14, 14..., the seismic damping connecting members 14, 14... can absorb external forces caused by seismic motion, etc., thereby exhibiting a high seismic damping effect.

[0072] Furthermore, by reducing the load on the tower-like structure 3, the sectional forces acting on the tower-like structure 3 during an earthquake can be reduced, which in turn allows for a reduction in the outer diameter and wall thickness of the cylindrical foundation body 4. [Explanation of symbols]

[0073] 1 Underwater ground 2 water surface 3. Offshore wind power generation equipment (tower-like structure) 4. Cylindrical base 5 Connection tube 6. Main body of the tower 7 Windmill equipment 8. Seismic damping structure 10. Seismic damping piles 11 Ground spring section 12 Filling material for natural frequency adjustment 13 Weight body for natural frequency adjustment 14. Seismic damping connecting member 15 Connectors 16 Pliers

Claims

1. In a seismic damping structure for a tower-like structure having a hollow cylindrical foundation body erected on the seabed ground while penetrating the seabed ground, The foundation includes a cylindrical seismic damping pile having a predetermined natural frequency, which is driven into the submarine ground within the aforementioned cylindrical foundation body. A seismic damping structure for a tower-like structure, characterized in that a ground spring portion made of the submerged ground is formed between the outer surface of the seismic damping pile and the inner surface of the cylindrical foundation body.

2. The seismic damping structure for a tower-like structure according to claim 1, wherein the seismic damping pile body is filled with a natural frequency adjustment material to a predetermined height inside.

3. The seismic damping structure for a tower-like structure according to claim 1 or 2, wherein the seismic damping pile body has a natural frequency adjustment weight fixed to the inner and / or outer circumferential surface at a predetermined height from the seabed ground.

4. The seismic damping structure for a tower-like structure according to claim 1 or 2, comprising a seismic damping connecting member that connects the inner surface of the tower-like structure and the outer surface of the seismic damping pile body at a predetermined height from the seabed ground.

5. The seismic damping structure for a tower structure according to claim 4, wherein a connector is fixed to the inner surface of the tower structure and the outer surface of the seismic damping pile body, to which the end of the seismic damping connecting member is detachably connected, and both ends of the seismic damping connecting member are each connected to the connector.

6. A method for constructing a tower-like structure with a seismic damping structure having a hollow cylindrical foundation body erected on the seabed ground while penetrating the seabed ground, A foundation cylindrical body erection step, in which the foundation cylindrical body is erected in a state in which it is penetrated into the seabed ground, The process includes inserting a cylindrical seismic damping pile into the cylindrical foundation body through the upper end opening and driving the pile into the submerged ground within the cylindrical foundation body, A method for constructing a tower-like structure with a seismic damping structure, characterized in that a ground spring section made of the submerged ground is formed between the outer surface of the seismic damping pile body having a predetermined natural frequency and the inner surface of the cylindrical foundation body.

7. After the seismic damping pile body is driven into the seabed ground, A method for constructing a tower-like structure with a seismic damping structure according to claim 6, wherein a natural frequency adjustment filler is filled into the seismic damping pile body to a predetermined height to adjust the natural frequency of the seismic damping pile body.

8. A method for constructing a tower-like structure with a seismic damping structure according to claim 6 or 7, wherein a weight for adjusting the natural frequency is fixed to a predetermined position on the inner and / or outer surface of the seismic damping pile body, and the seismic damping pile body is driven into the ground so that the weight for adjusting the natural frequency is located at a predetermined height from the seabed.

9. After the seismic damping pile body is driven into the seabed ground, The seismic damping structure for a tower structure with a seismic damping structure according to claim 6 or 7, wherein the inner surface of the tower structure and the outer surface of the seismic damping pile body are connected by a seismic damping connecting member at a predetermined height from the seabed ground.

10. A method for constructing a tower-like structure with a seismic damping structure according to Claim 9, wherein a connector is fixed to the inner surface of the tower-like structure and the outer surface of the seismic damping pile body, to which the end of the seismic damping connecting member is detachably connected, and both ends of the seismic damping connecting member are connected to the connector, respectively.

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