JP5563512B2 - Columnar structure and installation method of columnar structure - Google Patents

Description

  The present invention relates to a columnar structure and a columnar structure installation method, and more particularly to a columnar structure installed outdoors and a columnar structure installation method.

  Conventionally, when installing a communication antenna or the like outdoors, a columnar structure may be used. The columnar structure includes a pole and a foundation. The pole has a communication antenna attached to the tip, and is supported by the foundation by being fixed to the foundation. The foundation is embedded in advance so that a part is exposed to the ground surface before fixing the pole. When the pole is fixed to the foundation, for example, as shown in Patent Document 1, an anchor bolt is passed through the pole base plate and a nut is screwed together.

JP-A-10-121780

  By the way, in the case where the foundation is embedded in advance so that a part of the foundation is exposed to the ground surface and the pole is fixed to the foundation, the pole is fixed to the foundation after the foundation is embedded. Moreover, it was necessary to install anchor bolts for fixing the pole to the foundation. Therefore, the construction period until the installation of the columnar structure cannot be sufficiently shortened.

  Then, this invention is made | formed in view of the above, Comprising: It aims at proposing the installation method of the columnar structure which can shorten the construction period until installation of a columnar structure.

In order to solve the above-described problems and achieve the object, in the present invention, in a columnar structure installed outdoors , a pole which is a concrete pillar partially embedded in the ground, and the underground embedded in the ground And a base for supporting the pole by being fixed to the pole and fixing means for fixing the base to the pole, the fixing means facing the base A main body portion that is fixed to the pole so as to surround an outer peripheral surface of the pole, and a plurality of engaging portions that protrude radially outward from the main body portion and have an inflating portion at a tip, and the foundation is reinforced concrete. is formed by the and engages the plurality of the engaging portion within said body portion, characterized in cylindrical der Rukoto that integrates opposite ends of the iron plate or diamond plate welding or the like And

  In the columnar structure, the pole is preferably configured by connecting a plurality of poles.

  Further, in the present invention, the columnar structure installation method includes a step of excavating a hole in the ground surface, a step of installing a pole in the hole, and an outer peripheral surface of the pole facing the fixing means. A step of providing a reinforcing bar for the foundation so as to surround the portion; and a step of forming a concrete portion of the foundation so as to include the reinforcing bar therein.

  In the columnar structure and the columnar structure installation method according to the present invention, the foundation is integrally formed with respect to the portion embedded in the ground of the pole, so that the construction period until the columnar structure can be shortened. There is an effect.

FIG. 1 is a diagram illustrating a schematic configuration example of a columnar structure according to the embodiment. Drawing 2 is a figure which looked at the columnar structure concerning an embodiment from the perpendicular direction upper part. Drawing 3 is a figure which looked at the columnar structure concerning an embodiment from the perpendicular direction lower side. FIG. 4 is a diagram illustrating a schematic configuration example of the first pole. FIG. 5 is a diagram showing the fixing means. FIG. 6 is a radial cross-sectional view of the first pole. FIG. 7 is a vertical cross-sectional view of the first pole in the vertical direction. FIG. 8 is a diagram illustrating a flow of the columnar structure installation method according to the embodiment.

  Hereinafter, the present invention will be described in detail with reference to the drawings. In addition, this invention is not limited by the following embodiment. In addition, constituent elements in the following embodiments include those that can be easily assumed by those skilled in the art or those that are substantially the same.

  FIG. 1 is a diagram illustrating a schematic configuration example of a columnar structure according to the embodiment. Drawing 2 is a figure which looked at the columnar structure concerning an embodiment from the perpendicular direction upper part. Drawing 3 is a figure which looked at the columnar structure concerning an embodiment from the perpendicular direction lower side. FIG. 4 is a diagram illustrating a schematic configuration example of the first pole. FIG. 5 is a diagram showing the fixing means. FIG. 6 is a radial cross-sectional view of the first pole. FIG. 7 is a vertical cross-sectional view of the first pole in the vertical direction. 6 is a cross-sectional view taken along the line AA in FIG. FIG. 7 is a sectional view taken along line BB in FIG. As shown in FIG. 1, the columnar structure 1 according to the present embodiment is installed outdoors. As shown in FIGS. 1 to 3, the columnar structure 1 includes a pole 2, a fixing means 3, and a foundation 4.

  As shown in FIG. 1, the pole 2 has a communication antenna (not shown) attached to the tip 2a. The pole 2 is formed in a taper shape whose diameter increases as it goes downward from the front end portion 2a in the vertical direction. Part of the pole 2 is buried in the ground 101. In this embodiment, the pole 2 is about 30 m, the columnar structure 1 is installed with respect to the ground surface 100 so that about 5 m is embedded in the ground 101 and the rest protrudes from the ground surface 100. Moreover, the pole 2 is comprised by the 1st pole 21, the 2nd pole 22, and the 2 division structure in this embodiment.

  The 1st pole 21 comprises the lower part of the pole 2, and as shown in FIG. 4, the flange 21a is formed in the edge part of the perpendicular direction upper side. As shown in FIG. 6, the first pole 21 has a hollow structure having a hollow portion 21 b and is a concrete column such as a reinforced concrete column. As for the 1st pole 21, the edge part of the perpendicular direction lower side is embed | buried under the ground 101, and the fixing means 3 is provided in the outer peripheral surface.

  The 2nd pole 22 comprises the upper part of the pole 2, and as shown in FIG. 1, the flange 22a is formed in the edge part of a perpendicular direction lower side. Although not shown, the second pole 22 has a hollow structure having a hollow portion, and is a concrete column such as a reinforced concrete column. Here, the second pole 22 is connected to the first pole 21 by fixing the flange 22a to the flange 21a of the first pole 21, for example, by fixing with a bolt and a nut. That is, the pole 2 is configured by connecting the first pole 21 and the second pole 22 which are a plurality of poles. In addition, the hollow part 21b of the 1st pole 21 and the hollow part of the 2nd pole 22 are connected because the 1st pole 21 and the 2nd pole 22 connect.

  The fixing means 3 fixes the foundation 4 to the pole 2, and in the present embodiment, fixes the foundation 4 to the first pole 21. As shown in FIGS. 5 and 6, the fixing means 3 includes a main body portion 31 and a plurality of locking portions 32.

  The main body 31 fixes the plurality of locking portions 32 to the first pole 21. The main body 31 is provided so as to surround the outer peripheral surface of the first pole 21 facing the foundation 4. The main body 31 is formed of an iron plate, a striped steel plate, or the like, and is disposed on the outer peripheral surface of the first pole 21 facing the foundation 4, that is, around the first pole 21 to which the foundation 4 is fixed when the first pole 21 is embedded. It is fixed to the 1st pole 21 by integrating the both ends which are wound along and are opposed, for example by welding. In addition, the main-body part 31 is set so that the height of a perpendicular direction may become shorter than the height of the foundation 4 (refer FIG. 7).

  The plurality of locking portions 32 are formed so as to protrude radially outward from the main body portion 31. The plurality of locking portions 32 are fixed around the main body portion 31 at regular intervals and in one or more steps in the vertical direction. Each locking portion 32 has a shaft portion 32a and an inflating portion 32b. The shaft portion 32a has a radially inner end fixed to the outer peripheral surface of the main body 31 by, for example, welding. The inflating portion 32b has a cross-sectional area larger than the cross-sectional area in a plane orthogonal to the axial direction of the shaft portion 32a, and is connected to the radially outer end of the shaft portion 32a. That is, each locking portion 32 is formed integrally with the shaft portion 32a and the expanding portion 32b, and in this embodiment is a headed stud, and is fixed to the main body portion 31 by stud welding. Here, when the locking portion 32 is directly fixed to the first pole 21, a hole is made in the outer peripheral surface of the first pole 21, and the locking portion 32 is inserted and fixed in the opened hole. When the pole 21 is a reinforced concrete column, it is difficult to make a hole depending on the position of the internal reinforcing bar, and there is a problem that the strength decreases when the reinforcing bar is cut. However, in this embodiment, since the plurality of locking portions 32 are indirectly fixed to the first pole 21 via the main body portion 31, the plurality of locking portions 32 can be easily fixed to the first pole 21. it can. Moreover, it can suppress that the intensity | strength of the 1st pole 21 falls by fixing the latching | locking part 32 to the 1st pole 21. FIG.

  As shown in FIG. 1, the foundation 4 is embedded in the ground 101. The foundation 4 supports the pole 2 by being fixed to the pole 2 by the fixing means 3. As shown in FIG. 7, the foundation 4 is composed of lower end bars 41, upper end bars 42, and a concrete portion 43.

  The lower end stripe 41 is disposed on the upper side of the base portion 5 in the vertical direction. The lower end bars 41 are reinforcing bars, and a part thereof is fixed to the base part 5. The lower end bars 41 are formed in a lattice shape inside the concrete portion 43. As shown in FIG. 3, the lower end stripe 41 is formed with an opening 41 a for arranging the first pole 21 at the center. In addition, the reinforcing bar 41b is disposed in the lower end bar 41 so as to surround the opening 41a.

  As shown in FIG. 7, the upper end stripe 42 is arranged on the upper side in the vertical direction of the lower end stripe 41. The upper bar 42 is a reinforcing bar, and a part thereof is fixed to the lower bar 41 or the base part 5. The upper end bars 42 are formed in a lattice shape inside the concrete portion 43. The upper end bars 42 are formed such that the end portions extend downward in the vertical direction toward the lower end bars 41. That is, the upper end stripe 42 has a U-shaped cross-section in a plane including the vertical direction. As shown in FIG. 2, the upper end line 42 is formed with an opening 42 a for arranging the first pole 21 at the center. Here, a space portion 44 is formed by the lower end stripe 41 and the upper end stripe 42, and a part of the first pole 21 and a plurality of locking portions 32 of the fixing means 3 are located in the space portion 44.

  The concrete portion 43 is formed so as to include the lower end reinforcement 41 and the upper end reinforcement 42, that is, the space portion 44 is filled with concrete. Thereby, the foundation 4 is formed of reinforced concrete. The concrete portion 43 surrounds the outer peripheral surface of the first pole 21 and a plurality of locking portions 32 are located inside. Therefore, the foundation 4 locks the plurality of locking portions 32 inside. As a result, the foundation 4 supports the first pole 21 by being fixed to the first pole 21.

  Next, a method for installing the columnar structure according to the present embodiment will be described. FIG. 8 is a diagram illustrating a flow of the columnar structure installation method according to the embodiment. First, a pre-construction survey / design is performed (S1). In this process, the installation location of the columnar structure 1 is determined, the adaptive reference wind speed at the installation location is confirmed, the ground standard penetration test at the installation location, the size of the foundation 4 is determined, and the design of the columnar structure 1 (especially the foundation 4) Then, a work permit is obtained for the columnar structure 1. The ground standard penetration test also serves as a boring survey. When the pole 2 is fixed to the foundation 4 after the foundation 4 is buried in advance, excavation is performed until the support layer can be confirmed in accordance with the ground standard penetration test. In this embodiment, the depth corresponding to the pole 2 (main The pole 2 of the embodiment may be excavated to a depth of about 7 m). Therefore, since the ground standard penetration test in this embodiment can be performed in a short number of days, compared with the case where the pole 2 is fixed to the foundation 4 after the foundation 4 is buried in advance, the column structure 1 is installed. The construction period can be shortened. In addition, since the ground standard penetration test in the present embodiment can reduce the ground investigation cost, compared to the case where the pole 2 is fixed to the foundation 4 after the foundation 4 is embedded in advance, the columnar structure 1 is installed. Can reduce the cost.

  Next, surface excavation is performed (S2). In this step, excavation for forming a hole for embedding a part of the pole 2 and the foundation 4 in the ground 101 is performed. In the excavation process, a foundation excavation for forming a foundation hole for embedding the foundation 4 in the ground 101, an auger excavation for forming a pole hole for embedding a part of the first pole 21 in the underground 101, Is done. Thereby, a hole for embedding a part of the pole 2 and the foundation 4 in the ground 101 is formed in the ground surface 100. The foundation hole is formed wider than the foundation 4 to be embedded.

  Next, a local business is performed (S3). In this process, it is performed on the ground in order to support the foundation 4, and a base part 5 made of crushed stone or the like is provided below the foundation 4 in the vertical direction.

  Next, the first pole 21 is installed (S4). In this step, the first pole 21 is inserted into a pole hole formed on the ground surface 100 using a construction vehicle such as a crane. In addition, before the 1st pole 21 is inserted, the root hardening liquid (pile circumference fixing liquid) may be inject | poured into the hole for poles, and it does not need to be inject | poured.

  Next, bar arrangement and formwork installation are performed (S5). In this step, the lower end reinforcement 41 and the upper end reinforcement 42 are provided on the upper side in the vertical direction of the base portion 5, thereby arranging the bars so as to surround the portion of the outer peripheral surface of the first pole 21 that faces the fixing means 3. Further, after the bar arrangement, a formwork for pouring concrete to form the concrete portion 43 is installed around the lower end bar 41 and the upper end bar 42.

  Next, concrete placement is performed (S6). In this step, the concrete portion 43 of the foundation 4 is formed by pouring concrete into the formwork so as to include the lower end reinforcement 41 and the upper end reinforcement 42 therein. In addition, after concrete placement, curing is performed.

  Next, the second pole is installed (S7). In this step, the second pole 22 is connected to the first pole 21 by fixing the flange 22 a of the second pole 22 to the flange 21 a of the first pole 21. Thereby, the columnar structure 1 is installed outdoors. The step of filling the foundation 4 in the ground after placing the concrete may be performed after curing or after the second pole 22 is installed. Further, after the columnar structure 1 is installed outdoors by the above installation method, a communication antenna or the like is attached to the tip 2 a of the pole 2.

  In this embodiment, the pole 2 and the foundation 4 are integrally formed by fixing the foundation 4 to the portion embedded in the ground 101 of the first pole 21 via the fixing means 3. Compared with the case where the pole 2 is fixed to the foundation 4 after burying 4, there is no need to install anchor bolts and the first pole 21 can be installed at the time of concrete placement of the foundation 4. The construction period until the installation of 1 can be shortened, and the installation cost of the columnar structure 1 can be reduced.

  Moreover, in this embodiment, since the foundation 4 is fixed to the first pole 21 in a state where the first pole 21 is buried in the ground 101, it is possible to throw away concrete on the upper side of the base portion 5 in the vertical direction. The foundation 4 can be buried in the ground 101. Therefore, since no waste concrete is required, the construction period until the columnar structure 1 is installed can be shortened, and the design cost of the foundation 4 can be reduced.

  Moreover, in this embodiment, since the pole 2 is formed of a concrete column, the unit price of the pole 2 can be reduced as compared with the case where the pole 2 is formed of an iron pipe column having a similar height. The installation cost of the thing 1 can be reduced.

  As described above, according to the columnar structure 1 and the installation method of the columnar structure 1 according to the present embodiment, it is possible to greatly shorten the construction period until the installation of the columnar structure 1, and to greatly reduce the installation cost. can do.

  In the present embodiment, the antenna attached to the pole 2 is a communication antenna. However, the present invention is not limited to this, and any antenna that needs to be attached to an outdoor high place can be used. There may be. Further, not only the communication antenna but also a control device for controlling these may be attached to the pole 2.

  Further, in this embodiment, the pole 2 is divided into two parts, but the present invention is not limited to this, and may be a three-part structure or more. Moreover, when the height from the ground surface 100 is low, for example, 15 m or less, the divided structure may not be taken. When the pole 2 does not have a split structure, the step of connecting the second pole 22 to the first pole 21 can be eliminated, and the construction period can be further shortened.

  In the present embodiment, it is preferable to set several sizes of the foundation 4 in advance based on the results of the ground survey. When the pole 2 is fixed to the foundation 4 after the foundation 4 is buried in advance, the structural design is individually performed based on the result of the ground investigation. However, if several sizes of the foundation 4 are set in advance based on the ground survey result, it is only necessary to select the size of the foundation 4 from several sizes set based on the ground survey result. The design can be finished. Thereby, the construction period until the installation of the columnar structure 1 can be further shortened, and the design cost of the foundation 4 can be reduced.

DESCRIPTION OF SYMBOLS 1 Columnar structure 2 Pole 2a Tip part 21 1st pole 21a Flange 21b Hollow part 22 2nd pole 22a Flange 3 Fixing means 31 Main part 32 Locking part 32a Shaft part 32b Expansion part 4 Base 41 Lower end muscle 41a Opening part 42 Upper end Reinforcement 42a Opening 43 Concrete part 44 Space part 5 Base part 100 Ground surface 101 Underground

Claims (3)

In columnar structures installed outdoors,
A pole, which is a concrete pillar partially buried in the ground,
A foundation that is embedded in the ground and surrounds the outer peripheral surface of the pole, and supports the pole by being fixed to the pole;
Fixing means for fixing the foundation to the pole;
With
The fixing means includes a main body portion fixed to the pole so as to surround an outer peripheral surface of the pole facing the foundation, and a plurality of locking portions protruding radially outward from the main body portion and having an inflating portion at a tip. Have
The foundation is formed of reinforced concrete, and the plurality of locking portions are locked inside ,
It said body portion includes a columnar structure, wherein a cylindrical shape der Rukoto that integrates opposite ends of the iron plate or diamond plate welding or the like. In the columnar structure according to claim 1,
The said pole is comprised by connecting a some pole, The columnar structure characterized by the above-mentioned. It is the installation method of the columnar structure of Claim 1 or 2,
Drilling holes in the ground surface;
Installing a pole in the hole;
Providing the reinforcing bars of the foundation so as to surround a portion of the outer peripheral surface of the pole facing the fixing means;
Forming a concrete portion of the foundation so as to include the reinforcing bar therein;
The installation method of the columnar structure characterized by including.

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