JP5550372B2 - Antenna installation method and antenna installation equipment - Google Patents

Description

  The present invention relates to a method for installing a structure such as an antenna and a facility for installing the structure.

  The antenna is determined based on the horizontal and directivity, and can be transmitted and received with respect to the opposite pole by adjusting accurately. Therefore, it is necessary to install the antenna with respect to the horizontal and keep the state for a long time.

  Conventionally, an antenna or the like is installed on a foundation that is made of concrete or the like and is leveled on the foundation. For example, in Patent Document 1, a base is fixed on a foundation with bolts and nuts, and a mast member is fixed to the base. An antenna is attached to the mast member.

In the city center, for example, it is possible to install the antenna with relatively simple equipment using the roof of the building, but in places such as mountainous areas, a hole is dug in the ground to make a foundation It is necessary to make a foundation by pouring concrete into the hole. In addition, in such a case, it is necessary to transport heavy objects such as concrete to the mountains. Therefore, there is a problem that it takes time and labor for installing the antenna and the cost becomes very high.
Also, when an earthquake or disaster occurs, it is difficult to prepare a wireless communication facility easily and quickly at a low cost.

Japanese Patent Laid-Open No. 11-163614 (FIG. 1 etc.)

  In view of the circumstances as described above, an object of the present invention is to provide a structure that can be easily installed at any location, can reduce the cost of equipment and the cost of installation, and can be quickly deployed in an emergency. It is to provide an installation method and a structure installation facility.

  In order to achieve the above object, a structure installation method according to an aspect of the present invention is configured by arranging a frame member on an XY plane, and has a plurality of fixing portions in the X direction or the Y direction. A platform for mounting an object is prepared, and a plurality of piles are driven into the ground at a position corresponding to each of the fixed portions so as to have an exposed portion exposed from the ground, and each of the fixed portions is fixed to each predetermined portion of the exposed portion. Fix in position.

  In the present invention, a frame member is arranged on the XY plane, has a plurality of fixing portions in the X direction or the Y direction, and a frame on which a structure is mounted is prepared. It is fixed to the pile that has been driven in, and the gantry is positioned at the time of fixing. Therefore, in the present invention, it is possible to easily install the equipment for mounting the structure at any place regardless of the plane or the slope.

  Further, in the method for installing a structure according to the present invention, a large foundation such as concrete is not necessary, and the main part of the facility can be constituted by, for example, an iron frame or pipe, so that the cost of the facility can be reduced.

  Furthermore, in the structure installation method according to the present invention, since the installation is simple as described above, and it is not necessary to transport heavy objects such as concrete, the installation cost can be reduced. Moreover, the system can be quickly deployed even in an emergency.

  In the present invention, the pulling force per pile when the platform on which the structure is mounted is driven into the ground by the plurality of piles is calculated, and one pile is driven into the ground It is preferable to determine the diameter of the pile and the driving depth of the pile into the ground so that the pile friction force per pile when the pile is pulled is greater than the pulling force per pile. It is.

  In the present invention, if it is known whether the geology in the ground corresponds to a certain condition, other investigations are unnecessary, and the pile type can be determined by selecting the type of pile according to the equipment. Therefore, it is possible to design the facility very easily.

  An installation facility for a structure according to an aspect of the present invention is configured by arranging a frame member on an XY plane, and has a plurality of fixing portions in the X direction or the Y direction, and a mount on which the structure is mounted; A plurality of piles that are driven into the ground at a position corresponding to each of the fixing portions so as to have an exposed portion exposed from the ground, and a plurality of fixings that fix the fixing portions to predetermined positions of the exposed portions. Member.

  Therefore, in the present invention, it is possible to easily install a structure at any place regardless of a plane or a slope. Moreover, in this invention, since the principal part of an installation can be comprised with an iron frame or a pipe, for example, the cost of an installation can be reduced. Furthermore, in the present invention, the installation cost can be reduced. Moreover, the system can be quickly deployed even in an emergency.

  According to the present invention, it is easy to install a structure at any place, the cost of equipment and the cost of installation can be reduced, and the system can be quickly deployed in an emergency.

It is a perspective view which shows the structure of the radio | wireless communication equipment which concerns on one Embodiment of this invention. It is a top view of the radio | wireless communication equipment which concerns on one Embodiment of this invention. It is a side view of the radio | wireless communication equipment which concerns on one Embodiment of this invention. It is an enlarged view of the fixing | fixed part in the radio | wireless communication equipment which concerns on one Embodiment of this invention. It is a flow which shows the installation method of the antenna which concerns on one Embodiment of this invention. It is a figure which shows typically the state by which the pile was driven into the ground.

Next, embodiments of the present invention will be described with reference to the drawings.
The embodiment shown below is an example in which the present invention is applied to a wireless communication facility having an antenna. However, the present invention is not limited to such a wireless communication facility.

FIG. 1 is a perspective view showing a configuration of a wireless communication facility according to an embodiment of the present invention. FIG. 2 is a plan view of the wireless communication facility. FIG. 3 is a side view of the wireless communication facility.
As shown in these drawings, the wireless communication facility 1 includes an antenna 2, a mount 3, a plurality of piles 4, and a plurality of fixing members 5.
The antenna 2 is an antenna having directivity, for example. The antenna 2 is attached to the gantry 3 via a mast 14.

  The gantry 3 is configured by arranging the frame member 10 vertically and horizontally on an XY plane (a plane parallel to the ground). The frame member 10 may have an iron L-shaped angle member plated, for example. In this embodiment, four frame members 10 having a length of about 180 cm are arranged in parallel in the X direction, and two frame members 10 having a length of about 180 cm are arranged in parallel on the Y direction. Yes. The frame member 10 arranged in the X direction and the frame member 10 arranged in the Y direction are fixed by bolts and nuts 11 at the intersection of the frame member 10 arranged in the X direction and the frame member 10 arranged in the Y direction. ing.

  At approximately the center of the gap between the two frame members 10 arranged in the Y direction, a rectangular plate-like member 12 made of, for example, plated iron and about 30 cm square is arranged. The two frame members 10 and the plate member 12 arranged in the Y direction are fixed by bolts and nuts 13. At the center of the plate-like member 12, a mast 14 made of plated iron and having a diameter of about 9 cm and a height of about 50 cm is fixed by welding. That is, the plate-like member 12 and the mast 14 constitute one part. The antenna 2 is attached to the mast 14. Thereby, the gantry 3 mounts the antenna 2.

  The gantry 3 has a plurality of fixing portions 15 in each of the X direction and the Y direction. The fixing portion 15 is a pair of holes into which U-shaped bolts as the fixing member 5 are inserted. The fixing portions 15 are provided at two locations of the four frame members 10 arranged in the X direction. More specifically, the fixing portion 15 is provided at a location about 35 cm from the right end of each frame member 10 and a location about 35 cm from the left end. Thereby, the some fixing | fixed part 15 is provided in each of a X direction and a Y direction.

  Each pile 4 is driven into the underground G at a position corresponding to each fixed portion 15. Each pile 4 has an exposed portion 16 exposed from the underground G and a driving portion 17 driven into the underground G. The pile 4 is an iron pipe plated, for example. The diameter of the pipe and the length of the driving portion 17 (pile driving depth) are appropriately selected by the method according to the present invention described later.

The fixing member 5 fixes each fixing part 15 to a predetermined position of each exposure part 15 so that the gantry 3 is horizontal. More specifically, as shown in FIG. 4, the fixing member 5 is composed of, for example, a U-shaped bolt 18 and a nut 19. The U-shaped bolt 18 is inserted into the U-shaped bolt 18 while inserting a pipe as the pile 4. The fixing portion 15 is fixed with a nut 19 through a pair of holes. By appropriately adjusting the fixing position between the fixing portions 15, the gantry 3 is made horizontal. In this embodiment, the gantry 3 is leveled by such an adjustment method. Therefore, the radio communication equipment 1 of this embodiment can easily install the antenna equipment at any place regardless of a plane or a slope. In addition, the wireless communication facility 1 of this embodiment does not require a large foundation such as concrete, and the main part of the facility can be configured by an iron frame or pipe, so that the cost of the facility can be reduced. Furthermore, since the wireless communication facility 1 of this embodiment is easy to install as described above and does not need to transport heavy objects such as concrete, the cost of installation can be reduced. Moreover, the system can be quickly deployed even in an emergency.
Next, an antenna installation method according to an embodiment of the present invention will be described.
FIG. 5 is a flowchart showing an antenna installation method according to an embodiment of the present invention.
First, the parts constituting the gantry 5 and the antenna 2 are transported to the place where the antenna is installed (step 501).

  Next, the gantry 3 is assembled (step 502). Specifically, four frame members 10 (X-direction frame members) are arranged so as to be parallel at a predetermined interval, and two frame members 10 (Y-direction frame members) are arranged at predetermined positions thereon. The upper and lower frame members 10 are fixed with bolts and nuts. Then, the plate-like member 12 is arranged at the approximate center of the gap between the two frame members 10, and the plate-like member 12 to which the frame member 10 and the mast 14 are fixed is fixed by the bolt nut 13. Thereby, the mount frame 3 is assembled.

  Next, each pile 4 is driven into the underground G at a predetermined position corresponding to the position (each fixed portion 15) where the gantry 3 is disposed (step 503). The depth of driving the pile 4 into the underground G will be described later.

Next, each fixing portion 15 of the gantry 3 is fixed to a predetermined position of the exposed portion 16 of each pile 4 so that the gantry 3 is horizontal (step 504). As described above, the pile 4 is inserted into the U-bolt 18 constituting the fixing member 5 and the U-bolt 18 is fixed to the fixing portion 15 through the pair of holes and fixed by the nut 19 (see FIG. 4). Then, by appropriately adjusting the fixing position between the fixing portions 15, the gantry 3 is made horizontal. In this embodiment, the pile 5 is driven into the ground G, and then fixed with the pile 5, the gantry 3 and the U-shaped bolt nut, but the U-shaped bolt nut is attached to the gantry 3 with play, After that, after passing the pile 5 through the U-bolt, the pile 5 is driven into the underground G, and finally the U-bolt nut may be fixed while leveling.
Next, the antenna 2 is attached to the upper portion of the mast 14 of the gantry 3 (step 505), and the directivity of the antenna 2 is adjusted (step 506).
This completes the installation of the antenna.

By the way, strength design is important in a radio communication facility equipped with an antenna having a large wind receiving area and a considerable weight. Specifically, the equipment installed outdoors in this way must be able to withstand, for example, a wind speed of 40 m / s (class A wind pressure load). Therefore, in the facility according to the present invention, the strength is determined by the diameter of the pile 5 and the depth of driving the pile 5 into the underground G.
Hereinafter, the determination method will be described.

  In this determination method, first, the pulling force per pile when the mount 3 on which the antenna 2 is mounted is driven into the ground G with a plurality of piles 5 to configure the wireless communication facility 1 is calculated by calculation.

And the diameter of the pile 5 and the underground G of the pile 5 so that the pile friction force per pile when the one pile 5 is driven into the ground G is larger than the pulling force per pile. Determine the depth of implantation.
Hereinafter, these points will be described more specifically.
[Determination of support specifications and load calculation]
(1) Wind pressure setting P0: Wind pressure load

Here, the legal standard of wind pressure is based on the type of wind pressure load of “Distribution Regulation” 200-3 and its application (1) (2) (3), depending on the type of wind pressure load, classification of receiving wind pressure, region and facility location. being classified.
(2) Calculation of wind receiving area Wind receiving area: Am ² = vertical (m) x horizontal (m) of support dimensions
(3) Support load calculation Support weight: Vertical force (N) = Support weight (Kg) × 9.80665
Horizontal load: P (N) = Unit wind load (P0) x wind receiving area (A)
(4) Total wind load calculation Total wind load total: ΣP (N) = horizontal load of support (P) x number of supports (pieces)
(5) Wind-time bending moment calculation Bending moment: Mp (N · m)
= {Support installation height (m) x Wind load total (ΣP)} x Support column ground clearance (m) / 2
Here, {support support installation height (m) × wind load total (ΣP)} is added according to the support installation quantity.
[Determination of pile strength and specifications]
(6) Section modulus of pile group Section modulus between piles (example of pile installation in a square)
Section modulus (cm ³ / cm ² ): Zb
= (Number of piles per side) x midpoint A (cm ² ) of 4 sides full width + number of piles installed within 4 sides x midpoint B between piles (cm ² ) / midpoint A (cm) of 4 sides full width
(7) Pulling force per pile Pulling force: Tb = Mp / Zb
(Mp is obtained from (5) above and Zb is obtained from (6) above.)
(8) Determination of soil conditions

The soil condition is determined by the N value. Here, the N value is a test result (numerical value) for obtaining ground strength and the like obtained by the standard penetration test (JIS A 1219). (9) Pile friction force per pile Short-term load (N): Rf = Geology (N) / 5 x Φ (pile diameter mm) x L (pile driving depth m)
Usually, consider short-term loads. Incidentally, in the case of long-term load, it is as follows.
Long-term load (N): Rf = geology (N) / 5 × Φ (pile diameter mm) × L (pile driving depth m) × 1.5
(1.5 is a long-term coefficient.)
(10) Determination of strength Pile friction force Rf (N)> Pull-out force per pile Tb (N)

The diameter Φ (mm) of the pile, the length L1 (mm) of the pile, and the driving depth L2 of the pile are selected so as to be (see FIG. 6). Actually, based on the above calculation, a pile having a condition of the diameter Φ and the length L1 is selected from the ready-made products, and the pile is driven into the ground by the calculation result depth L2 in actual construction.

  Conventionally, when installing an antenna or the like, it has been necessary to investigate how strong the equipment and foundation are required at the place of installation and to design those equipment and foundation. On the other hand, in the strength determination method according to the present invention, generally, if the soil condition N value under certain conditions for soil types according to laws and regulations (Distribution Regulations Article 58) is known, other investigations are unnecessary and the facility is used. The type of pile is selected accordingly, and the driving depth of the pile may be determined.

By applying the present invention to a wireless communication facility having the above-mentioned antenna or the like, for example, by deploying this facility in an emergency, a mobile phone line or the like can be very easily and quickly even in an area where communication is interrupted. Can be recovered.
In addition, this invention is not limited to said embodiment.

  For example, in the above-described embodiment, an L-shaped angle member has been described as an example of the frame member constituting the gantry, but other members such as pipes may be used as a matter of course. The number of frame members arranged vertically and horizontally on the XY plane can be determined as appropriate. Of course, other means other than the holes may be used for the fixing portion. Further, although the U-shaped bolt has been described as an example of the fixing member, other members may of course be used.

DESCRIPTION OF SYMBOLS 1 Wireless communication equipment 2 Antenna 3 Base 4 Pile 5 Fixing member 10 Frame member 15 Fixing part 16 Exposed part G Underground

Claims (3)

A frame member is arranged vertically and horizontally , has a plurality of pairs of holes in the vertical direction or the horizontal direction, and prepares a mount for mounting the antenna .
A plurality of piles are driven into the ground at a position corresponding to each of the pair of holes so as to have an exposed portion exposed from the ground,
A plurality of fixing members composed of U-bolts and nuts provided in each pair of holes, each U-bolt is inserted into each pair of holes, and each pile is attached to each U-bolt. Insert and fix each pair of holes at a predetermined position of each exposed portion with each fixing member so that the pedestal is horizontal
How to install the antenna . An antenna installation method according to claim 1,
By calculating the pulling force per pile when driving the mount on which the antenna is mounted into the ground by the plurality of piles,
The diameter of the pile and the pile into the ground so that the pile friction force per pile when the one pile is driven into the ground is larger than the pulling force per pile. Determine the driving depth
How to install the antenna . A pedestal that is configured by arranging the frame member in the vertical and horizontal directions, in the vertical or horizontal direction has a plurality of pairs of holes, mounting the antenna,
A plurality of piles driven into the ground at a position corresponding to each of the pair of holes so as to have an exposed portion exposed from the ground;
It is composed of a U-bolt and a nut, the U-bolt is inserted into the pair of holes, the pile is inserted into the U-bolt, and the U-bolt and the An antenna installation facility comprising: a plurality of fixing members that fix each of the pair of holes to a predetermined position of each exposed portion with a nut .

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