JP6740885B2 - Tower structure - Google Patents

Description

The present invention relates to a tower structure.

In a city gas pipeline, it may be necessary to discharge the gas in the pipeline to the atmosphere in order to maintain the pipeline and cope with an unexpected situation at the time of a disaster such as an earthquake. For this reason, the governor (decompression) station and the emergency shutoff valve station, which are installed every several kilometers, are equipped with a diffusion tower to diffuse the gas in the pipeline into the atmosphere (Patent Document 1, etc.). In such a diffusion tower, the emission of gas from a diffusion port provided at the top of the diffusion pipe is controlled by opening and closing a valve provided in the middle of a pipe for introducing gas from a pipeline into the diffusion pipe. Also, the height from the surface to the diffuser is preferably higher than the neighboring buildings in urban areas so that the gas diffused from the diffuser does not affect the neighborhood. The height is higher than the neighboring buildings.

In addition, the governor (decompression) station and the emergency shutoff valve station send signals to the central monitoring room for gas flow rate and pressure values measured at each station, and signals for opening and closing the emergency shutoff valve are sent to the central monitoring room. There is also a case where a radio tower to which an antenna used for radio communication received from is attached. In such a radio tower, an antenna is attached to the upper part of the radio tower, and in order to perform good radio communication, it is desirable to position the antenna in a higher position than a neighboring building in an urban area, as a result, The height of the radio tower is higher than the neighboring buildings.

JP, 2002-371728, A

However, if the diffusion tower and the radio tower as described above are installed next to each other in an urban area, there is a problem in that the height of the tower causes complication in the landscape.

The present invention has been made in view of the above-mentioned problems, and an object thereof is a tower-like structure capable of reducing the complexity of the landscape as compared with the case where a diffusion tower and a radio tower are installed next to each other. Is to provide.

In order to solve the above-mentioned problems and achieve the object, the tower-like structure according to the present invention is
(1) A cylindrical structure in which a plurality of steel pipes are stacked upward from the ground by connecting a plurality of connecting portions, and an antenna support structure that is attached to an outer peripheral surface of the cylindrical structure and supports an antenna, A diffusion pipe provided in the internal space of the cylindrical structure for discharging gas, and a gas introduction path provided outside the cylindrical structure to the diffusion pipe to muffle the gas passing through the inside. A muffler, a plurality of stages that are individually provided below the connecting portions in the internal space corresponding to the plurality of connecting portions, and are used by an operator as a scaffold, and the tubular structure. Provided on a lower side wall, a ground side entrance for the worker to enter and exit from the ground to the internal space portion, and a side wall at a position corresponding to the antenna support structure of the tubular structure, Between the support structure side entrance and exit for entering and exiting the antenna support structure from the internal space, and the ground side entrance and exit and the support structure side entrance and exit provided in the internal space, through the plurality of stages A plurality of lifting ladders for the worker to move up and down between them, and a ring shape having a through hole provided in the internal space and penetrating in the axial direction of the tubular structure, a plurality of holding members capable of holding the dissipating trenchless through dissipation tubes, and a plurality of support members for supporting the plurality of holding members for each said tubular structure in said internal space, before Symbol vanishing The gas, which has passed through the sounding device and is introduced into the diffusion tube, is diffused from a diffusion port formed at the top of the diffusion tube.

(2) Further, in the tower-like structure according to (1) above, a buffer material made of resin is fixed to the outer peripheral surface of the diffusion pipe, and the buffer material and the inner peripheral surface of the holding member are separated from each other. It is characterized by facing each other .

(3) In the tower-like structure according to (1 ) above, a buffer material made of resin is fixed to the inner peripheral surface of the holding member, and the buffer material and the outer peripheral surface of the diffusion tube are separated from each other. It is characterized by facing each other .

(4) Further, in the tower-like structure according to any one of (1) to (3) above, the plurality of holding members correspond to the plurality of stages in the internal space. It is characterized in that it is provided individually below the stage .

(5) Further, in the tower-like structure according to any one of (1) to (4), the tubular structure and the antenna support structure are made of weather-resistant steel. Characterize.

INDUSTRIAL APPLICABILITY The tower-like structure according to the present invention has the effect of reducing the complexity of the landscape as compared with the case where the desorption tower and the radio tower are installed next to each other.

FIG. 1 is a schematic diagram showing an example of a conventional radio tower. FIG. 2 is a schematic diagram showing an example of a conventional diffusion tower. FIG. 3 is an overall view of the tower-shaped structure according to the embodiment. FIG. 4 is a cross-sectional view taken along the line AA of the tower-shaped structure in FIG. FIG. 5 is a BB cross-sectional view of the tower structure in FIG. FIG. 6 is a schematic diagram showing a connecting portion of a tower-like structure and its vicinity. FIG. 7 is a schematic diagram showing a connecting portion of a tower-like structure and its vicinity when a cushioning material is fixedly provided on the outer peripheral surface of the diffusion tube. FIG. 8 is a schematic diagram showing the connecting portion of the tower-like structure and its vicinity when the cushioning material is fixedly provided on at least the inner peripheral surface of the retaining ring.

Hereinafter, an embodiment of the tower-shaped structure according to the present invention will be described. The present invention is not limited to this embodiment.

FIG. 1 is a schematic diagram showing an example of a conventional wireless tower 200. The conventional wireless tower 200 shown in FIG. 1 has a tubular structure 202 standing on a base 206 installed on the ground 100, and two supporting structures provided at the upper end of the tubular structure 202. The objects 203A and 203B, the antennas 230A and 230B supported by the support structures 203A and 203B, and the like. The height of the wireless tower 200 is, for example, about 60 [m].

In the radio tower 200 shown in FIG. 1, a temporary scaffold is provided outside the radio tower 200 so that an operator can move between the ground 100 and the support structures 203A and 203B when performing maintenance on the antennas 230A and 230B. Need to be provided. Therefore, each time the antennas 230A and 230B are maintained, the temporary scaffolding is installed and removed, resulting in a corresponding increase in maintenance cost and maintenance period.

In addition, when the height of the radio tower 200 is increased in order to increase the reception accuracy of the antennas 230A and 230B in consideration of the heights of surrounding buildings, the tubular structure 202 is increased according to the height. If the diameter is not increased, the rigidity of the tubular structure 202 is insufficient with respect to wind load and seismic load, and the wireless tower 200 cannot stand on its own. Further, since the reception accuracy of the antennas 230A and 230B is affected by the mounting angle of the antennas 230A and 230B, the rigidity of the tubular structure 202 provided with the support structures 203A and 203B that support the antennas 230A and 230B can be reduced. It is necessary to increase the height to suppress the swing of the tubular structure 202. Therefore, if the diameter of the cylindrical structure 202 is increased in order to increase the rigidity of the cylindrical structure 202, the cost such as the material cost and the installation space of the wireless tower 200 increase accordingly.

FIG. 2 is a schematic diagram showing an example of a conventional diffusion tower 300. The conventional diffusion tower 300 shown in FIG. 2 has a diffusion pipe 304 standing on a base 306 installed on the ground 100, a silencer 305 installed inside the diffusion pipe 304, and an outside of the diffusion pipe 304. A plurality of stages 307a, 307b, 307c, 307d provided to be used as a scaffold or the like when an operator performs work such as maintenance, or work provided between the stages 307a, 307b, 307c, 307d provided outside the diffusion tube 304. It is composed of a plurality of lifting ladders 308a, 308b, 308c, etc., for people to come and go. The height of the diffusion tower 300 is, for example, about 15 [m] to 60 [m].

In the diffusion tower 300 shown in FIG. 2, since the silencer 305 is provided inside the diffusion pipe 304, the diameter of the diffusion pipe 304 below the diffusion pipe 304 is smaller than that of the diffusion pipe 304. The diameter is increasing. Further, since the stages 307a, 307b, 307c and the elevating ladders 308a, 308b, 308c, etc. are provided outside the diffusion tube 304, the stages 307a, 307b, 307c, 307d and the elevating ladders are performed. At the time of maintenance of the diffusion pipe 304 using the ladders 308a, 308b, and 308c, the worker is affected by the external environment such as the weather and works.

In addition, when the height of the diffusion tower 300 is increased in order to diffuse the gas from the diffusion port 304a formed at the top of the diffusion pipe 304 at a position higher than the surrounding buildings, depending on the height, If the diameter of the diffusion pipe 304 is increased to increase the rigidity of the diffusion pipe 304, the cost such as the material cost increases and the installation space of the diffusion tower 300 increases accordingly.

Here, if the radio tower 200 as shown in FIG. 1 and the diffusion tower 300 as shown in FIG. 2 are placed next to each other separately, an installation space for installing two mounting structures is required. At the same time, there is a possibility that the height may cause complication in the landscape. Therefore, in the present embodiment, the radio tower and the desorption tower are not placed separately next to each other, but a radiation pipe is placed in the tubular structure that constitutes the radio tower to provide the functions of the radio tower and the radiation tower. It is a monolithic tower structure. As a result, the cost can be reduced and the installation space can be reduced as compared with the case where the desorption tower and the radio tower are separately installed next to each other, and at the same time, the complexity of the landscape due to the two tower-shaped structures being installed next to each other is reduced. can do. Hereinafter, the tower-like structure according to the embodiment will be specifically described.

FIG. 3 is an overall view of the tower structure 1 according to the embodiment. FIG. 4 is a cross-sectional view taken along the line AA of the tower-shaped structure 1 in FIG. FIG. 5 is a BB sectional view of the tower-shaped structure 1 in FIG. As shown in FIG. 3, the tower-shaped structure 1 includes a tubular structure 2, support structures 3A and 3B that support the antennas 30A and 30B, a diffusion pipe 4, a silencer 5, and stages 7a and 7b. , 7c, 7d (sometimes referred to simply as "stage 7" if not particularly distinguished) and lifting ladders 8a, 8b, 8c, 8d (if not particularly distinguished, simply referred to as "lifting ladder 8"). It may also be referred to as “.” and the like. The tower-shaped structure 1 according to the embodiment has a height of about 60 [m], and the antennas 30A and 30B supported by the support structures 3A and 3B provided on the upper part of the tubular structure 2. Thus, it has both the function of a radio tower and the function of a diffuser tower that can transmit and receive radio waves at a high place and can diffuse gas from the diffuser pipe 4 at a high place.

The lower end of the tubular structure 2 is fixed to a base 6 made of reinforced concrete, a part of which is buried in the ground. The tubular structure 2 is formed with an internal space 40 that communicates from the lower end to the upper end in the axial direction (vertical direction), and the lower end of the internal space 40 is closed by the base 6. Further, the tubular structure 2 is configured by stacking a plurality of steel pipes 20a, 20b, 20c, 20d (which may be simply referred to as "steel pipes 20" unless otherwise distinguished) in an upward direction from the ground 100. Each steel pipe 20 is formed in a tubular shape penetrating in the axial direction. Therefore, the internal space 40 of the tubular structure 2 is formed by connecting the internal spaces of the steel pipes 20 in the axial direction (vertical direction).

In the present embodiment, as each steel pipe 20, a weather resistant material, for example, a weather resistant steel pipe formed by molding a weather resistant steel material (such as SMA400) into a tubular shape is used, and the surface of each steel pipe 20 is unpainted. is there. Thereby, in order to maintain the weather resistance of each steel pipe 20, the maintenance work of repainting the surface of each steel pipe 20 can be omitted.

In addition, as shown in FIG. 3, the steel pipes 20a, 20b, 20c, and 20d have connecting portions 9a, 9b, 9c, and 9d in which axial ends of adjacent steel pipes 20 are connected to each other. Sometimes referred to as "part 9"). FIG. 6 is a schematic view showing the connecting portion 9c of the tower-shaped structure 1 and its vicinity. Since the connecting portions 9a, 9b, 9c and 9d have the same configuration, the connecting portion 9c will be described as an example with reference to FIG.

As shown in FIG. 6, an upper end flange 90c is provided on the upper end side in the axial direction of the steel pipe 20c so as to project radially inward of the steel pipe 20c, and a lower end flange 91d is provided on the lower end side in the axial direction of the steel pipe 20d. Are provided so as to project inward in the radial direction of the steel pipe 20d. Then, the upper end flange 90c and the lower end flange 91c are fastened and fastened with a nut 93c through a bolt 92c through a bolt hole 94c that connects the steel pipe 20c and the steel pipe 20d. Thus, the connecting portion 9c is configured by fastening the upper end flange 90 and the lower end flange 91 with the bolt 92 and the nut 93. In addition, as the connecting portion 9, the end portions in the axial direction of the adjacent steel pipes 20 may be butted and joined together by welding. In this case, it is preferable that welding processing be performed in the internal space 40 of the tubular structure 2.

As shown in FIG. 3, two support structures 3A and 3B that support the antennas 30A and 30B are provided on the upper portion of the tubular structure 2 so as to be vertically separated from each other. On each of the support structures 3A and 3B, stages 31A and 31B, which are scaffolds used when an operator performs maintenance, fences 32A and 32B circumferentially provided on the stages 31A and 31B, and an antenna 30A. , 30B, and the like, are configured by supporting frames 33A, 33B and the like. A lightning rod 35 is attached to the upper support structure 3A of the two support structures 3A and 3B.

In addition, in the present embodiment, the support structures 3A and 3B are made of a weather resistant material, for example, a weather resistant steel material (such as SMA400), and the surfaces of the support structures 3A and 3B are unpainted. .. Thereby, in order to maintain the weather resistance of the support structures 3A and 3B, the maintenance work of repainting the surface of the support structures 3A and 3B can be omitted.

As shown in FIG. 3, on the side wall of the steel pipe 20 a which is the lower portion of the tubular structure 2, a ground-side entrance/exit 10 for workers to enter and exit from the ground 100 into the internal space 40 of the tubular structure 2 is provided. Has been. In addition, the side wall of the steel pipe 20e at a position corresponding to the support structures 3A and 3B of the tubular structure 2 is supported to move in and out of the support structures 3A and 3B from the internal space 40 of the tubular structure 2. Structure side entrances/exits 11A and 11B are provided, respectively. Then, in the internal space 40 of the tubular structure 2, a plurality of elevating means as elevating means are provided so that the worker can ascend and descend between the ground side entrance 10 and the support structure side entrances 11A and 11B. Ladder 8a, 8b, 8c, 8d, 8e is provided corresponding to each steel pipe 20a, 20b, 20c, 20d.

As a result, the worker enters the internal space 40 of the tubular structure 2 through the ground-side entrance/exit 10 or the support structure-side entrance/exit 11A, 11B, and uses the lifting/lowering ladders 8 to move the internal space 40. By moving up and down and exiting from the internal space 40 via the ground-side entrance 10 or the support structure-side entrance 11A, 11B, the interior space 40 is passed between the ground 100 and the support structures 3A, 3B. You can come and go. Therefore, when a worker moves between the ground 100 and the support structures 3A and 3B, it is possible to suppress the influence of the external environment such as the weather.

In FIG. 3, among the lifting ladders 8a, 8b, 8c, 8d, 8e, the lifting ladder 8b (see FIG. 5) and the lifting ladder 8d (see FIG. 4) provided corresponding to the steel pipe 20b and the steel pipe 20d. ) Is not shown, the lifting ladder 8b and the lifting ladder 8d are arranged in the circumferential direction of the tubular structure 2 with respect to the lifting ladders 8a, 8c, 8e provided corresponding to the steel pipes 20a, 20c, 20e. It is located at a position offset by a predetermined angle and is not shown in order to make the drawing easier to see.

As shown in FIG. 3, in the internal space 40, a plurality of stages 7a, 7b, 7c, 7d used by workers as scaffolds for maintenance and the like are connected to connect the adjacent steel pipes 20 of the tubular structure 2. It is provided corresponding to the parts 9a, 9b, 9c, 9d. Further, each stage 7 is formed with an elevating/lowering port for the elevating/lowering ladder 8 at a position corresponding to each of the elevating/lowering ladders 8 located immediately below the stage 7, and the elevating/lowering ladder 8 is passed through the elevating/lowering port. Workers can move back and forth between and stage 7.

In addition, each stage 7 is located at a position within 2 [m] below each connecting part 9 corresponding to each stage 7 so that an operator can easily access each connecting part 9 from each stage 7. It is provided in. In the present embodiment, since the connecting portions 9 are located in the internal space portion 40, the worker moves the internal space portion 40 in the up-down direction by using the elevating ladders 8 to move the internal space portion 40 from the top of each stage 7. Each connecting part 9 can be inspected and maintained. Accordingly, at the time of inspection/maintenance of each connecting portion 9, it is not necessary to install a temporary scaffold or the like outside the tubular structure 2 in order for a worker to access each connecting portion 9, and the maintenance cost can be reduced. The maintenance period can be shortened and maintainability can be improved.

Moreover, in the tower-shaped structure 1 according to the embodiment, as shown in FIG. 3, the upper and lower ends for releasing the gas from the gas introduction pipe 50 into the internal space 40 of the tubular structure 2 are open. A diffusion tube 4 composed of the above described pipe body is arranged. The lower end portion of the diffusion pipe 4 is a tip end portion of a silencer 5 provided outside the tubular structure 2 via a connecting portion 51 provided on a side wall of the steel pipe 20a which is a lower portion of the tubular structure 2. Connected with. As a result, the gas that has been silenced from the gas introduction pipe 50 through the silencer 5 is introduced into the diffusion pipe 4 through the connection portion 51 and can be diffused from the diffusion port 4 a formed at the top of the diffusion pipe 4. Has become.

The gas introduction pipe 50 is provided with a valve (not shown), and in a normal time when the gas is not diffused from the diffusion port 4a, the gas introduction pipe 50 is diffused through the silencer 5 with the valve closed. No gas is introduced into No. 4. On the other hand, when the gas is diffused from the diffusion port 4a, the gas can be introduced into the diffusion pipe 4 from the gas introduction pipe 50 through the silencer 5 by opening the valve.

An opening/closing lid (not shown) for opening/closing the diffusion port 4a is provided at the top of the diffusion pipe 4, and the gas diffusion port 4a is normally closed when the opening/closing lid is closed. By closing 4a, it is possible to prevent rain or the like from entering the diffusion pipe 4 through the diffusion port 4a. When the gas is diffused from the diffusion port 4a, the opening/closing lid is opened to open the diffusion port 4a by operating a lid opening/closing device (not shown) that opens/closes the opening/closing lid.

Further, in the tower-shaped structure 1 according to the embodiment, by providing the silencer 5 outside the tubular structure 2, compared to the case where the silencer 5 is provided in the internal space 40 of the tubular structure 2, The diameter of the tubular structure 2 can be reduced, and accordingly, the cost of materials and the like can be reduced, and the installation space of the tubular structure 2 can be saved.

Here, since the diffusion pipe 4 expands and contracts in the axial direction due to the influence of the temperature change due to the pressure reduction from the operating pressure to the atmospheric pressure, if the diffusion pipe 4 is restrained in the axial direction, internal stress and reaction force are generated, This causes adverse effects such as distortion of the diffusion tube 4 and the tubular structure 2. If the tubular structure 2 is thus distorted, for example, the mounting angles of the antennas 30A and 30B supported by the support structures 3A and 3B provided above the tubular structure 2 will change, The reception accuracy may deteriorate.

Therefore, in the present embodiment, the tubular shape is supported below the respective stages 7 in the internal space portion 40 of the tubular structure 2 via the supporting members to the respective steel pipes 20 of the tubular structure 2. The diffusion tube 4 is held by a plurality of holding members having through holes penetrating in the axial direction of the structure 2.

For example, in FIG. 4, the inner space 40 of the steel pipe 20c is the through hole through the brace 21c (which may be simply referred to as "brace 21" unless otherwise specified) that is the support member. A holding ring 22c (which may be simply referred to as "holding ring 22" unless otherwise specified) that is the holding member having a through hole 23c is supported by the steel pipe 20c. In addition, in FIG. 5, the holding ring 22b, which is the holding member having the through hole 23b, which is the through hole, is provided to the steel pipe 20b through the brace 21b, which is the support member, in the internal space 40 of the steel pipe 20b. Supported. Then, the diffusion pipe 4 can be held by the holding rings 22b, 22c by passing the diffusion pipe 4 through the through holes 23b, 23c of the holding rings 22b, 22c. As a result, for example, as shown in FIG. 6, the radial movement of the diffusion tube 4 is restricted by the retaining ring 22c, but the axial direction of the diffusion tube 4 is not constrained by the retaining ring 22c, so during an earthquake. In addition, while suppressing the radial vibration of the diffusion pipe 4 in the internal space 40 of the tubular structure 2 by the retaining ring 22c, expansion and contraction of the diffusion pipe 4 in the axial direction due to a temperature decrease is caused by the tubular structure. It is possible to prevent the object 2 from being adversely affected.

Further, since the diffusion pipe 4 is supported by the steel pipes 20 of the tubular structure 2 via the braces 21, the diffusion pipe 4 can be self-supported without increasing the rigidity of the diffusion pipe 4. As a result, when the height of the diffusion pipe 4 is increased so that the gas can be diffused from the diffusion port 4a at a position higher than the surrounding buildings, the rigidity is increased according to the height of the diffusion pipe 4. It is possible to suppress an increase in the diameter of the diffusion tube 4, which can be achieved, and to reduce the material cost of the diffusion tube 4 and save the installation space. Further, since the diameter of the tubular structure 2 including the diffusion tube 4 can be suppressed, the cost of the material of the tubular structure 2 can be reduced and the installation space can be saved. it can.

FIG. 7 is a schematic diagram showing the connecting portion 9c of the tower-shaped structure 1 and its vicinity when the cushioning material 24 is fixedly provided on the outer peripheral surface of the diffusion tube 4. FIG. 8 is a schematic diagram showing the connecting portion 9c of the tower-shaped structure 1 and its vicinity when the cushioning material 24 is fixedly provided on at least the inner peripheral surface of the holding ring 22. In the tower-shaped structure 1 according to the embodiment, as compared to the configuration shown in FIG. 6, for example, as shown in FIG. It may be referred to as a "buffer 24".), or the buffer 24c may be fixedly provided on at least the inner peripheral surface of the holding ring 22c as shown in FIG. By making it possible to hold the diffusion pipe 4 by each holding ring 22 via the cushioning material 24 between the outer peripheral surface of the diffusion tube 4 and the inner circumferential surface of each holding ring 22, the cushioning material 24 can be used to Radial vibration can be suppressed more effectively. As a material of the buffer material 24, for example, a resin material such as polyethylene can be used. Further, the cushioning material 24 may have a certain thickness as shown in FIGS. 7 and 8 or may be a thin sheet.

Here, when trying to increase the height of the tubular structure 2 from the ground 100, unless the rigidity of the tubular structure 2 is increased according to the height, the tubular structure 2 is tubular against wind load and earthquake load. The rigidity of the structure 2 may be insufficient, and the cylindrical structure 2 may not be able to stand on its own. Generally, in a cylindrical body standing upright from the ground like the tubular structure 2, the diameter of the cylindrical body is increased according to the height of the cylindrical body in order to increase the rigidity. This leads to an increase in cost and installation space.

On the other hand, as in the tower-shaped structure 1 according to the embodiment, the stages 7 and the braces 21 are attached to the tubular structure 2 in the internal space 40 of the tubular structure 2. The stages 7 and the braces 21 function as reinforcing members that reinforce the tubular structure 2, and the rigidity of the tubular structure 2 can be increased. Therefore, it is possible to suppress the increase in diameter of the tubular structure 2 for increasing the rigidity in accordance with the height of the tubular structure 2, and to reduce the cost of the tubular structure 2 and thus the tower structure 1 by that amount. It is possible to reduce the installation space.

DESCRIPTION OF SYMBOLS 1 Tower structure 2 Cylindrical structure 3A Support structure 3B Support structure 4 Emission pipe 4a Emission port 5 Silencer 6 Base 7a Stage 7b Stage 7c Stage 7d Stage 8a Elevating ladder 8b Elevating ladder 8c Elevating ladder 8d Elevating ladder 8e Elevating ladder 9a Connecting part 9b Connecting part 9c Connecting part 9d Connecting part 10 Ground side entrance 11A Support structure side entrance 11B Support structure side entrance 20a Steel pipe 20b Steel pipe 20c Steel pipe 20d Steel pipe 20e Steel pipe 21b Brace 21c Brace 22b Retaining ring 22c Retaining ring 23b Through hole 23c Through hole 24c Buffer material 30A Antenna 30B Antenna 40 Internal space 50 Gas introduction pipe 51 Connection 100 Ground

Claims (5)

A tubular structure in which a plurality of steel pipes are stacked at a plurality of connecting portions in an upward direction from the ground and stacked ,
An antenna support structure that is attached to the outer peripheral surface of the tubular structure and supports the antenna,
A diffusion pipe provided in the internal space of the cylindrical structure for diffusing gas,
A silencer provided in a gas introduction path to the diffusion pipe outside the tubular structure, and silencing the gas passing through the inside,
A plurality of stages that are individually provided below the connecting portions in the internal space corresponding to the plurality of connecting portions, and that are used by an operator as a scaffold;
A ground side entrance for the worker to enter and exit from the ground to the internal space portion, which is provided on the side wall at the bottom of the tubular structure,
A support structure-side entrance and exit for being provided in a side wall at a position corresponding to the antenna support structure of the tubular structure, for entering and exiting the antenna support structure from the internal space portion,
Provided in the internal space, a plurality of lifting ladders for the worker to ascend and descend between the ground side entrance and the support structure side entrance through the plurality of stages,
A plurality of holding members that are provided in the internal space portion and have a ring shape having a through hole that penetrates in the axial direction of the tubular structure, and that can hold the radiation pipe through the radiation pipe through the through hole;
A plurality of supporting members that respectively support the plurality of holding members in the internal space with respect to the tubular structure,
Equipped with
Before SL gas introduced into the stripping tube through the Mute device, the tower-like structure, characterized in that to dissipate from dissipating opening formed in the top portion of the dissipating trenchless. The tower-like structure according to claim 1,
A shock absorbing material made of resin is fixed to the outer peripheral surface of the diffusion pipe, and the shock absorbing material and the inner peripheral surface of the holding member face each other with a space therebetween. The tower-like structure according to claim 1,
A resin-made cushioning material is fixed to the inner peripheral surface of the holding member, and the cushioning material and the outer peripheral surface of the diffusion tube are spaced apart and face each other. The tower-like structure according to any one of claims 1 to 3,
The tower-like structure, wherein the plurality of holding members are individually provided below the stages in the internal space corresponding to the plurality of stages, respectively. The tower-like structure according to any one of claims 1 to 4,
A tower-like structure, wherein the tubular structure and the antenna support structure are made of weather resistant steel.

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