JP2012127083A - Towering structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a towering structure which has a sufficient strength as a structure and does not damage the beauties in the surrounding areas.SOLUTION: A towering structure includes a columnar main body erected on the foundation, plural beam members that are coupled to the main body and extend from the main body in a radiation direction in plane view, and plural tension members that are coupled to the tips of the beam members and the foundation.

Description

  The present invention relates to a tower-like structure.

2. Description of the Related Art Conventionally, there is a self-standing tower-like structure for installing an antenna that transmits and receives radio waves used in mobile phones and the like. In order to perform good radio wave transmission and reception between these antennas, the position of the antenna on the structure needs to be about 30 to 50 m above the ground.
In order to increase the structure for this purpose, it is conceivable to increase the horizontal sectional area of the structure in order to ensure the strength and stability of the structure body. However, simply increasing the horizontal cross-sectional area increases the materials used and leads to increased costs.

  For example, Patent Document 1 discloses a technique related to a cylindrical antenna tower structure. In this antenna tower structure, a tower is constituted by a concrete body having a truncated cone shape.

However, the tower-like structure having such a structure requires a large amount of material such as concrete to be used, which increases costs. Moreover, since it has a huge surface area, it obstructs the field of view and damages the surrounding landscape.
Moreover, in order to construct such a large structure, a large space larger than its horizontal cross-sectional area is required, and there are some areas where construction is impossible.

  On the other hand, if the body of the tower is made too thin in pursuit of aesthetics and cost, there is a high risk of collapse due to the effects of strong winds and snow.

Special table 2009-530962

  This invention is made | formed in view of said situation, and it aims at providing the tower-like structure which has sufficient intensity | strength as a structure and does not impair the surrounding beauty | look.

  A tower-like structure according to the present invention includes a columnar main body built on a foundation, a plurality of beam members that are joined to the main body and extend in a radial direction in plan view from the main body, and tip portions of the beam members; A tower-like structure including a plurality of tension members joined to the foundation.

  The tower-like structure according to the present invention has sufficient strength as a structure and can be constructed without impairing the surrounding beauty.

According to one aspect of the present invention, the main body is configured by stacking cylindrical units made of concrete.
By setting it as said structure, construction becomes easy and low-cost.

  According to another aspect of the invention, tension is introduced into the tension member. By setting it as such a structure, the compressive force which arises in a main body and the tension force which arises in a tension member balance, and it becomes possible to ensure sufficient intensity | strength with a minimum structure.

  According to an aspect of the present invention, the beam member is provided in a plurality of stages at the uppermost portion of the main body and the intermediate portion of the main body.

  According to an aspect of the present invention, the main body is made of a centrifugally cast precast pile material.

  According to an aspect of the present invention, it further includes a ring-shaped member that connects the distal ends of the beam members. This makes it possible to attach a directional antenna or the like in a preferred direction.

  According to an aspect of the present invention, the tension member is a wire, a steel bar, or a shaped steel.

  According to one aspect of the present invention, an antenna is attached to the beam member or the ring-shaped member, and a wireless device is installed in a space surrounded by a tension member on the foundation, and the wireless device and the antenna are connected by a feeder line. Connected.

  The tower-like structure according to the present invention has an effect that it has sufficient strength as a structure and does not impair the surrounding aesthetics.

It is the schematic of the inside of the tower-shaped structure which concerns on embodiment of this invention. It is the schematic of the cylindrical unit used for the tower-like structure which concerns on embodiment of this invention. It is a figure explaining the main body structure by the cylindrical unit which concerns on embodiment of this invention. It is an external view of the tower-like structure which concerns on embodiment of this invention. It is the schematic explaining the cable drawing-in member which concerns on embodiment of this invention.

DESCRIPTION OF SYMBOLS 1 Tower-like structure 2 Base 3 Main body 4 Beam member 5 Pulling member 6 Cylindrical unit 7 Ladder 8 Transmission apparatus 9 Radio equipment 10 Ring-shaped member 11 Cylindrical antenna 12 Parabolic antenna 13 Feeder wire 14 Cable drawing member

  Hereinafter, the tower-like structure of the present invention will be described based on the embodiments. However, these embodiments are described to help understanding of the present invention, and the present invention is described in the described embodiments. It is not limited.

  As shown in FIG. 1, a tower-like structure 1 according to this embodiment is joined to a columnar main body 3 built on a foundation 2 and the main body 3 and extends from the main body 3 in a radial direction in a plan view. It includes a plurality of beam members 4 and a plurality of tension members 5 joined to the tip of the beam member 4 and the foundation 2.

  Since the tower-like structure 1 having the above configuration includes the tension member 5 that fixes the main body 2 via the beam member 4, the tower-like structure 1 has sufficient strength as a structure. Moreover, since it is comprised from a thin member, a visual field is not obstruct | occluded and the surrounding aesthetics are not impaired. Moreover, since the members to be used can be minimized, the cost is low and the construction is easy.

  Next, each structure of the tower-shaped structure which concerns on this embodiment is demonstrated.

[Main unit]
The main body 3 is made of a member that can resist compressive force and bending moment by design.
As shown in FIG. 1, the columnar main body 3 is installed on the foundation 2 and is substantially perpendicular to the ground surface. The main body 3 is preferably columnar with a height of 30 to 50 m and a diameter of 0.5 to 1 m. A part of the main body 3 is embedded in the foundation 2 placed in the ground. Or it is fixed in the shape of a root.

The main body 3 is preferably formed by stacking cylindrical units made of prestressed concrete.
Here, prestressed concrete is a concrete member to which stress is applied in advance, and has a characteristic of being strong in compressive force. Therefore, for example, even when a compressive force is applied to the main body 3 by a tension member 5 to be described later, a crack or the like does not occur.

  When a plurality of cylindrical unit members 6 are connected in the length direction, the unit members are pressure-bonded by tightening the plurality of unit members in the length direction using a tension material. This tendon is provided inside or outside the cylindrical unit member 6.

  In particular, as a member constituting the main body 3, it is preferable to use a centrifugally cast precast pile material, which is a kind of ready-made pile, from the viewpoints of structure, construction, and economy.

  The length of the cylindrical unit 6 is preferably 5 to 13 m, and the diameter is preferably 0.5 m to 1.0 m. The outer shape of the cylindrical unit is not particularly limited, but a cylindrical shape, a trapezoidal cone shape, a rectangular parallelepiped shape, or the like is preferable.

  Further, as shown in FIG. 2, a beam member 4, a ring-shaped member 10, and the like, which will be described later, may be attached to the cylindrical unit 6 prior to the construction of the main body 3.

For joining the cylindrical units 6, existing methods such as joining by welding or joining by a steel plate and a bolt can be used. Furthermore, joining with a steel pipe and a bolt and fitting joining are also possible.
For example, as shown in FIG. 3, the cylindrical units 6 may be joined to each other by covering the upper ends of the existing columnar units 6 with the lower ends of the cylindrical units 6. This method is preferable because a process such as welding accompanying joining of the cylindrical units 6 is not necessary.

  In addition, it is preferable that the main body 3 is provided with equipment for use by workers, such as a ladder 7 and a lifting device.

  The foundation 2 has a portion that is placed in the ground and a portion that is exposed to the ground surface. A transmission device, a rectifier, and the like, which will be described later, are placed on the portion exposed to the ground surface. This portion has an area of about 7 m × 7 m, for example. Moreover, it is preferable that the part in which the part of the main body 3 is embed | buried under the foundation 2 is laid deeper in the ground than the other part.

[Beam members]
The beam member 4 is a means for relaying the main body 3 and the tension member 5, and is provided in a plurality of stages at the uppermost part (top) of the main body 3 and the intermediate part of the main body 3 as shown in FIG. 1 or 4. It is preferable.

  The beam member 4 is provided so that one end thereof is joined to the main body 3 and extends in a radial direction from the main body 3, and supports the tension member 5 at the distal end portion (that is, the end portion not joined to the main body 3). To do.

  As shown in FIG. 2, the beam member 4 is provided in a planar view radial direction with the main body 3 as the center. In the tower-like structure 1, it is preferable that the number of the beam members 4 located at the same height is 3 to 8.

  Further, if the number of beam members 4 is three or more, it is preferable because the balance of tension by the tension member 5 is appropriately applied to the main body 3. Moreover, if the number of the beam members 4 is eight or less, the weight of the whole tower-like structure will be reduced, and the number of members will be reduced, so that it can be provided at low cost.

  The beam member 4 may be provided so as to penetrate the main body 3 and may be joined to the tension member 5 at both ends thereof.

  Moreover, according to one aspect of the present invention, it is preferable that the length of the beam member 4 positioned at the lower portion of the main body 3 is longer than the length of the beam member 4 positioned at the upper portion of the main body 3. With this configuration, as shown in FIG. 1, the tension member 5 is inclined with respect to the main body 3 in the lower part of the tower-like structure 1, and the lower part of the tower-like structure 1 is lower than the upper part thereof. A wide space can be secured. Moreover, the effect that the lower part than the tower upper part can resist a larger fall moment can be acquired.

  Equipment such as the transmission device 8 and the wireless device 9 can be installed in the space surrounded by the tension members 5. Since equipment can be accommodated in the space surrounded by the tension members 5, the appearance of the tower-like structure 1 itself is not impaired.

  In the tower-like structure 1 which concerns on this embodiment, it is preferable that the ring-shaped member 10 which connects the front-end | tip parts of the beam member 4 is further included. The ring-shaped member 10 is a ring-shaped member centering on the main body 3 as shown in FIG. For example, the ring-shaped member 10 may be manufactured by curving a grooved steel having a U-shaped cross section in a ring shape.

  By providing such a ring-shaped member 10, it is possible to attach an antenna in addition to the beam member 4. For this reason, a directional parabolic antenna or the like can be attached in a preferable direction.

[Tensile member]
The tension member 5 is joined to the tip portion (the end portion not joined to the main body 3) of the beam member 4 and the foundation 2.

  The beam member 4 and the tension member 5 are joined by a joining means such as a steel metal product. In addition, the tension member 5 is joined to the base 2 by a joining means such as a steel metal product, and hangs substantially parallel to the main body 3.

  A tension (tensile force) is applied to the tension member 5 as necessary. In the tower-like structure 1 according to the present embodiment, the tension force generated in the tension member 5 and the compressive force generated in the main body 3 are balanced, so that sufficient strength can be ensured even with a minimum number of members. It becomes possible.

  The tension member 5 is a member having resistance to tension, and for example, a wire rope, a steel bar, or a shape steel can be used. Since such a wire rope is thin, the field of view is not obstructed, and the main body 3 can also be configured with a minimum thickness, so that the surrounding landscape is not impaired.

  For example, as shown in FIG. 4, the tension member 5 has its upper end joined to the other end of the beam member 4 positioned at the top of the main body 3, and the middle part of the tension member 5 is connected to the middle part of the main body 3. It will be in the state joined to the beam member 4 located.

  In addition, as shown in FIG. 4, the number of tension members 5 may be increased in the lower part of the tower-like structure 1. Such a tension member 5 is joined to the beam member 4 whose upper end is located in the middle part of the tower-like structure 1.

  For the purpose of suppressing deformation due to wind or earthquake, the tension member 5 may connect the foundation 2 and the beam member 4 in any form and direction. For example, the tension member 5 may be disposed in a twisted position with respect to the main body 3, that is, in a direction that is not parallel to a plane including the axial direction of the main body 3.

  For example, in order to suppress torsional vibration due to wind, the plurality of tension members 5 may be arranged in a net shape by connecting them in a direction that obliquely intersects in an elevational view. In this case, the plurality of tension members 5 are joined to the beam member 4 and the foundation 2 at different positions when viewed in plan.

The tower structure 1 according to the present embodiment is preferably used as a tower for radio wave communication. When used as a tower for radio wave communication, as shown in FIG. 1, an antenna (cylindrical antenna 11, parabolic antenna) is attached to the beam member 4 (or ring-shaped member 10) or the tension member 5 located at the upper part of the main body 3. 12) is attached. In the space surrounded by the tension member 5 on the foundation 2, the transmission device 8 and the wireless device 9 are connected to these devices and the antenna by a feeder line 13.
Moreover, in order to install the transmission apparatus 8 and the wireless device 9, an expanded metal or the like may be laid on the beam member 4 to constitute a scaffold.

  Further, in the tower-like structure 1 according to the present embodiment, it is preferable that the cable lead-in member 14 is installed at the tip of the beam member 4 for one stage among the beam members 4 having a plurality of stages. The cable drawing member 14 introduces a tension force to the tension member 5 by adjusting the pulling amount of the tension member 5 in the direction of the main body 3.

For example, as shown in FIG. 5, the cable drawing member 14 may be configured such that a screw member connects between a member that sandwiches the tension member 5 and a member that is joined to the beam member 4. In this case, the pulling amount of the tension member 5 can be adjusted by rotating the screw member.
By providing such a cable drawing member at the distal end portion of the beam member 4, it is not necessary to provide a jack or the like at the end portion of the tension member 5, and it becomes possible to introduce a tension force to the tension member 5 more easily.

  As shown in FIG. 1, the tension member 5 is stretched from the beam member 4 located at the top of the main body 3 to the foundation 2, but may be from the beam member 4 to the foundation 2 in the middle part of the main body 3. This has the advantage of reducing the horizontal deformation of the body due to the horizontal load. In some cases, the lower end of the tension member 5 may be joined to the lowermost beam member 4.

  As described above, the tower-like structure according to the present invention includes a tensile member that fixes the main body via a beam member, and therefore has sufficient strength as a structure. Moreover, since it is comprised from a thin member, a visual field is not obstruct | occluded and the surrounding aesthetics are not impaired. Moreover, since the members to be used can be minimized, the cost is low and the construction is easy.

  In the tower structure according to the present invention, the antenna can be easily installed even after construction. Moreover, since the tower-shaped structure which concerns on this invention is comprised from the minimum member, it has the advantage that a disassembly is easy.

Claims (8)

A columnar body built on the foundation;
A plurality of beam members joined to the main body and extending from the main body in a planar view radial direction;
A tower-like structure including a distal end portion of the beam member and a plurality of tension members joined to the foundation.   The tower-like structure according to claim 1, wherein the main body is configured by stacking cylindrical units made of concrete.   The tower-like structure according to claim 1 or 2, wherein tension is introduced into the tension member.   The tower-like structure according to any one of claims 1 to 3, wherein the beam member is provided in a plurality of stages at an uppermost portion of the main body and an intermediate portion of the main body.   The tower-like structure according to any one of claims 1 to 4, wherein the main body is made of a centrifugally cast precast pile material.   The tower-like structure according to any one of claims 1 to 5, further comprising a ring-shaped member that connects tip portions of the beam members.   The tower structure according to any one of claims 1 to 6, wherein the tension member is a wire, a steel bar, or a shape steel. An antenna is attached to the beam member,
A wireless device is installed in a space surrounded by tension members on the foundation,
The tower structure according to any one of claims 1 to 7, wherein the wireless device and the antenna are connected by a feeder line.

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