Support structure of tower

Abstract

To provide a support structure of a tower which can reduce the cost of the support structure than conventional support structures and reduce a total generation amount of CO2.SOLUTION: A support structure of a tower has one wooden column 10 supporting installations installed in a top thereof. The wooden column 10 includes a hermetically closed wound part 12 in a portion thereof in contact with the ground at least equal to or higher than the ground water level, and is founded in the bearing ground under the ground surface.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to support structures for towers constructed for various applications such as wind power generation. [Background technology]

[0002] Traditionally, many of the antenna facilities for mobile phone base stations, large outdoor lighting facilities, signs, and wind power generation facilities have used tower support structures made of concrete or steel.

[0003] For example, in Japan, the mainstream horizontal axis type small wind power towers are steel monopole type as shown in Figure 1. After driving the support piles, a concrete foundation is constructed and the steel monopole is installed. The joint between the pole and the concrete foundation is structured using the "anchor bolt method" or "anchoring method", and after the joint is completed, the concrete foundation is backfilled. Such conventional steel towers are heavy, so the inertial force is large during earthquakes and the concrete foundation tends to be large.

[0004] As a prior art, Patent Document 1 discloses an invention in which cone-shaped supports are manufactured from wooden beams reinforced with glass fiber, carbon fiber, or the like, taking into consideration manufacturing costs and environmental aspects. [Prior art documents] [Patent documents]

[0005] [Patent Document 1] Special Publication No. 2010-529364 Summary of the Invention [Problem to be solved by the invention]

[0006] However, the support structure of conventional towers requires large concrete foundations as mentioned above, which increases the cost of foundation work during construction and the overall CO2 emissions from manufacturing to construction. 2The invention disclosed in Patent Document 1 also assumes that wooden beams are reinforced with glass fiber, carbon fiber, etc., which reduces manufacturing costs and CO 2 The effect of the reduction will be limited.

[0007] In view of the above problems, the present invention aims to reduce the cost of the tower support structure and to reduce the overall CO 2 The objective is to provide a tower support structure capable of reducing the amount of generated heat. [Means for solving the problem]

[0008] The invention related to (1) is a support structure for a tower, which has a single wooden pillar that supports equipment to be installed on top, and is characterized in that the wooden pillar has a sealed wrapping section at least at the part that contacts the ground at or above the groundwater level, and is erected on the supporting ground below the ground level.

[0009] The invention related to (2) is a tower support structure described in (1) above, wherein the wooden support has a connection part that allows one more wooden support to be added vertically to the wooden support.

[0010] The invention according to (3) is the tower support structure described in the above (2), in which the connection portion is provided on the sealed winding portion.

[0011] The invention related to (4) is a tower support structure described in any one of (1) to (3) above, in which the equipment installed on the upper part of the wooden support is a wind power generation equipment. Effect of the Invention

[0012] According to the present invention, the weight of the tower is reduced by using wooden supports for the tower support structure. In addition, by erecting the wooden supports into the supporting ground, the need for a large concrete foundation as in the past is eliminated.

[0013] This reduces the workload of lifting and transporting during tower construction, making it possible to significantly reduce the cost of foundation work. 2 This is expected to contribute to curbing global warming through reduction in emissions, and will add high value to the tower as a monument. In addition, the simplification of the support structure will reduce the effort and cost required for removal. [Brief description of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic cross-sectional view illustrating a conventional support structure for a small wind power tower (steel monopole type). [Diagram 2] 2 is a schematic side view illustrating a support structure of a tower in the first embodiment of the present invention. FIG. [Diagram 3] FIG. 2 is a perspective view showing an example of a connection mode of wooden posts at a connection portion of the wooden posts in an embodiment of the present invention. [Figure 4] FIG. 2 is a perspective view showing an example of a connection mode of wooden posts at a connection portion of the wooden posts in an embodiment of the present invention. [Diagram 5] 11 is a schematic side view illustrating a support structure of a tower in a second embodiment of the present invention. FIG. [Figure 6] 13 is a schematic side view illustrating a support structure of a tower in a modified example of the second embodiment of the present invention. FIG. [Figure 7] FIG. 11 is a perspective view showing how a support wire is installed on a wooden post in a second embodiment of the present invention. [Figure 8] 13 is a plan view showing an example of a branch wire mounting member in a second embodiment of the present invention. FIG. [Figure 9] FIG. 11 is a schematic cross-sectional view illustrating the fitting between the lower end of a wooden post and a post support member in a second embodiment of the present invention. [Figure 10] FIG. 11 is a schematic cross-sectional view illustrating the fitting between the lower end of a wooden post and a post support member in a second embodiment of the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0015] Hereinafter, various embodiments of the tower support structure of the present invention will be described with reference to the drawings.

[0016] First embodiment An example of a tower support structure in a first embodiment of the present invention is shown in a schematic side view in Fig. 1. As shown in the figure, the tower support structure has one wooden support 10 that supports equipment (such as a wind power generation equipment) to be installed on the upper part, and the wooden support 10 has a sealed wrapping part 12 at a part that contacts the ground at least above the groundwater level, and is built into the supporting ground below the ground surface.

[0017] The wooden post 10 can be made of solid wood (logs), but can also be made of laminated boards or lumber such as CLT (Cross Laminated Timber) or NLT (Nail Laminated Timber), or laminated materials or plywood such as LVL (Laminated Veneer Lumber) or DLT (Dowel Laminated Timber). The wooden post 10 can be made of solid material, but is not limited thereto, and can also be made of hollow material.

[0018] Since wood is susceptible to corrosion in the areas that come into contact with the soil above the groundwater level, a sealed wrapping section 12 is provided that wraps the wood with steel plates, fiber sheets, cement-based materials, wrapping, etc. This makes it possible to effectively prevent corrosion of the wooden posts 10.

[0019] When erecting the wooden post 10, a post-hole type erection method can be used in which a post-hole is excavated from the ground surface to the supporting ground using an earth auger, and the wooden post 10 is hoisted with a lifting machine and erected.

[0020] 2, the wooden post 10 may be provided with a connection part 13 that allows one more wooden post 10 to be connected vertically to the wooden post 10. This makes it possible to ensure the required height of the wooden post 10 by connecting a wooden post 10 that does not meet the required length.

[0021] Figures 3 and 4 show an example of a connection mode at the connection part 13 of the wooden post 10. To explain in more detail, as shown in Figure 3(a), a number of holes 131a are drilled in the upper end part of the lower wooden post 10a, and as shown in Figure 3(b), joint members 132 are inserted into the holes 131a. The joint members 132 can be deformed reinforcing bars, bolts, or rod-shaped or plate-shaped materials having the required strength, and it is also possible to use a combination of a number of these types of joint members 132.

[0022] Next, a hole 131b is drilled in advance in the upper wooden post 10b to be connected, and a joint member 132 is fitted into the hole 131b. Then, as shown in Fig. 4(c), adhesive is injected through an adhesive injection hole drilled in the hole 131a of the lower wooden post 10a, and the adhesive is discharged through an adhesive discharge hole drilled in the hole 131b of the upper wooden post 10b, filling the holes 131a and 131b with adhesive. This makes it possible to firmly connect the lower wooden post 10a and the upper wooden post 10b.

[0023] 4(d), the connection part 13 may be wrapped with a winding reinforcement member 133 made of a steel plate, a fiber sheet, a cement-based material, wrapping, or the like, thereby reinforcing the connection part 13. Also, by making the position of the connection part 13 the same as the position of the sealed wrapping part 12 described above, in addition to the reinforcing effect by wrapping the connection part 13, it is possible to improve corrosion resistance, durability, fire resistance, and the like.

[0024] Second Embodiment Next, a second embodiment of the present invention will be described with reference to the drawings. Note that a description of the configuration common to the first embodiment will be omitted.

[0025] An example of a tower support structure in the second embodiment of the present invention is shown in a schematic side view in Fig. 5. As shown in the figure, the tower support structure is characterized by having one wooden pole 10 that supports equipment (such as a wind power generation equipment) to be installed on the upper part, a pole support member 15 that is installed on the ground surface and supports the lower end of the wooden pole 10, and a guy wire 16 that supports the wooden pole 10 by a tension member.

[0026] Since the wooden pole 10 is lighter than the conventional steel pole, the pole support member 15 can be made significantly smaller than before, and can be installed (placed directly) on the ground surface. The pole support member 15 can be made thin and flat to distribute the load, and can be a precast member instead of being cast in place. As long as it has the required strength, it can be made of other materials such as steel instead of concrete.

[0027] Furthermore, by supporting the lower end of the wooden post 10 on the upper surface of the post support member 15 installed on the ground surface, the length for embedment is not required, so that it is more likely that the required height of the wooden post 10 can be secured with a single piece of solid wood without extending the wooden post 10 with the connecting part 13 shown in the first embodiment. Of course, it is possible to provide the connecting part 13 in the second embodiment and extend the wooden post 10 depending on the required height of the wooden post 10.

[0028] The support wires 16 that support the wooden poles 10 with tension members increase the load-bearing capacity, including wind resistance and earthquake resistance, of the wooden poles 10, and effectively prevent the wooden poles 10 from falling over. The support wires 16 can be made of metal bars or wires, or synthetic ropes or wooden tension members.

[0029] One end of the guy wire 16 is connected to a guy wire attachment member 17 provided at a predetermined location on the wooden post 10, and the other end of the guy wire 16 is connected to an earth anchor 14 buried in the ground. As shown in Fig. 6, the other end of the guy wire 16 may be connected to a weight 18 installed on the ground, and furthermore, the earth anchor 14 and the weight 18 may be used in combination.

[0030] The number of support wires 16 is at least three. Preferably, support wires 16 are provided in four or more directions and are arranged to withstand loads from all directions. When tensioning the support wires 16, known means such as turnbuckles can be used.

[0031] 7 shows an example of how the branch wires 16 are installed on the wooden post 10. That is, in the example shown, a first branch wire mounting member 17a and a second branch wire mounting member 17b are provided at a predetermined height position on the wooden post 10, and two branch wires 16 are connected to each of them.

[0032] Fig. 8(a) shows a plan view of the first support wire mounting member 17a, and Fig. 8(b) shows a plan view of the second support wire mounting member 17b. As shown in the figures, since the wooden support 10 is not a uniform material compared to steel, the wooden support 10 is sandwiched between two arc-shaped metal bands 171 and fastened with fastening bolts 173 in order to distribute the load.

[0033] Furthermore, an end of the branch line 16 is connected to the fastening point of the metal band 171. Furthermore, the metal bands 171 of the first branch line mounting member 17a and the second branch line mounting member 17b are provided with fixing bolts 172 at multiple locations (six locations in the illustrated example) for fixing the metal bands 171 to the wooden post 10. This makes it possible to firmly fix the first branch line mounting member 17a and the second branch line mounting member 17b to the wooden post 10.

[0034] 9 and 10 show various ways in which the wooden post 10 is supported by the post support member 15. That is, the wooden post 10 is not connected and fixed to the post support member 15, but is configured so that the lower end of the wooden post 10 fits into a fitting protrusion or recess provided on the post support member 15.

[0035] More specifically, in the embodiment shown in FIG. 9(a), a fitting recess 150 is formed on the upper surface of the pole support member 15, and is configured to fit part or all of the lower end of the wooden pole 10 into the fitting recess 150.

[0036] In addition, in the embodiment shown in Figure 9 (b), an engaging protrusion 151 is formed on the upper surface of the pole support member 15, and the engaging protrusion 151 is configured to engage with a recess provided on the lower end of the wooden pole 10.

[0037] 9(c), the above-mentioned fitting protrusion 151 is formed on a plate 152 made of metal or the like, and the plate 152 is fixed to the upper surface of the column support member 15. Of course, the plate 152 can be made of various materials other than metal as long as it has the required strength.

[0038] Furthermore, the embodiment shown in Fig. 10(d) shows an embodiment in which the above-mentioned plate 152 is installed on the ground surface as the pole support member 15. In other words, if the ground reaction force required to support the wooden pole 10 can be obtained, it is possible to support the wooden pole 10 in the embodiment shown in the figure. For example, the necessary ground reaction force can be obtained by adjusting (e.g., enlarging) the ground contact area of ​​the plate 152. Note that, although a convex portion is provided on the plate 152 in the example shown in the figure, this is not limiting and a concave portion may also be provided.

[0039] As described above, by fitting the wooden post 10 and the post support member 15 together without fixing them, horizontal movement of the wooden post 10 can be effectively prevented. Furthermore, by exposing the end of the wooden post 10, maintenance is improved and replacement of the wooden post 10 becomes easier.

[0040] In addition, it is possible to reduce earthquake input and obtain a seismic isolation effect by not fixing the wooden pillar 10 to the pillar support member 15. Of course, fixing the wooden pillar 10 is not necessarily prohibited.

[0041] (Another embodiment) Although the first and second embodiments of the present invention have been described above, the present invention is not necessarily limited to the above-mentioned embodiments. For example, the supporting wire 16 in the second embodiment can be applied to the wooden post 10 in the first embodiment. By configuring in this way, it is possible to reduce the embedment depth of the wooden post 10 and improve workability.

[0042] In addition, the above-mentioned embodiments have been described as tower support structures capable of supporting a wide range of equipment, such as antenna equipment for mobile phone base stations, large outdoor lighting equipment, and signs, but they can be particularly suitably used as support structures for wind power generation towers, the construction of which has been progressing in recent years. This allows for a significant reduction in material costs and construction labor compared to the conventional steel monopole type, and further reduces the CO 2 It is expected that reductions will contribute to curbing global warming.

[0043] The scope of the present invention is defined by the claims, not by the description of each embodiment above, and includes all modifications within the meaning and scope of the claims. The specific materials, dimensions, shapes, etc. described in the above embodiments can be modified within the scope of the present invention. [Explanation of symbols]

[0044] 10 Wooden Posts 10a Lower wooden support 10b Upper wooden post 12 Sealed winding section 13 Connection 14 Earth Anchor 15 Pillar support member 16 branch line 17 Support wire mounting member 17a First branch line attachment member 17b Second branch line mounting member 18 weight 131a hole 131b hole 132 Joint parts 133 Winding reinforcement member 150 Fitting recess 151 Fitting protrusion 152 Plate 171 Metal Band 172 Fixing bolt 173 Fastening bolt

Claims

1. It has one wooden support pole that supports the equipment installed on the top, The wooden support is The pipe is provided with a sealed lining section at the portion that contacts the ground at least above the groundwater level, Built on supporting ground below ground level A tower support structure comprising:

2. The wooden post has a connection part that allows one more wooden post to be connected vertically to the wooden post.

2. The tower support structure of claim 1.

3. The connection portion is provided on the sealed winding portion.

3. A tower support structure as claimed in claim 2.

4. The equipment installed on the top of the wooden pole is a wind power generation equipment. A tower support structure according to any one of claims 1 to 3.

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