JPH05112953A - Foundation structure of steel tower - Google Patents

Abstract

PURPOSE:To reduce an installation area of a steel tower in the case the steel tower is installed and, at the same time, to reduce a number of piles to be used. CONSTITUTION:A bar-shaped post 14f provided between 11a-13a and extended in the opposite direction to a steel tower 10 and a large number of arm sections 14g provided to the peripheral surface of the post 14f and extended in horizontal are provided to the basic end of the steel tower 10, and the concrete 24 is filled into an opening section of a pile 22 in a state to insert the post 14f into the opening of the front end of the cylindrical pile 22 erected into an installation place together with the arm sections 14g as a unit. The steel tower is firmly borne against forward, backward and sideways vibration by synergism of the arm sections 14g provided to the post 14f and the concrete 24. According to the constitution, an interval between structural steels can be set narrowly and, at the same time, the foundation section of the installation place can be set narrowly in correspondence with it, and even one pile is available.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a golf course, a driving range, various other ball games fields, and a steel tower for supporting a net surrounding the ball training field, and a basic structure of other various steel towers.

[0002]

2. Description of the Related Art As one type of basic structure of a steel tower, there is a basic structure of a steel tower in which a base end portion in the longitudinal direction is fixed to a base portion provided at an installation site and is erected. As the conventional basic structure, the structure shown in FIGS. 6A and 6B is adopted. In the basic structure, the support plate 1b is welded to the base end of each steel frame 1a that constitutes the steel tower 1, while a large number of concrete piles 2 are driven into the installation location, The front end faces the bottom of the recess 3 provided at the installation location. In the recess 3, a large number of reinforcing bars are arranged and filled with concrete 4, and a plurality of support bolts 5a are fixed to the tip of each pile 2 and are erected to support each bolt 5a. It is inserted through the plate 1b and fixed with a nut 5b. This makes the tower 1
Is standing upright supported by the foundation.

[0003]

By the way, since the above-mentioned steel tower 1 has a height of several tens of meters, it is necessary to be firmly supported by the foundation portion. To cope with this, each steel frame 1
The distance between a is set to a ratio of about 1/10 of the height of the tower 1, the foundation of the installation site is formed to a size corresponding to this, and the number of piles 2 supporting the tower 1 is increased. It is necessary to use. For example, in an iron tower for supporting a ball-proof net of a golf course having a height of 50 m, the distance between the steel frames constituting the steel tower is set to about 5 m,
Generally, the foundation of the installation site is set to a length of 5 m or more corresponding to this, and six or more piles are used.
Therefore, a large installation area is required to install the tower, and a large number of piles are required to support the tower. Therefore, an object of the present invention is to provide a basic structure of a steel tower which requires a small installation area of the steel tower and uses a small number of piles.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a basic structure of a steel tower, in which a base end portion in the longitudinal direction is fixedly erected on a base portion provided at a place of installation, and the base end portion of the steel tower is provided. Is a rod-shaped first support portion that is provided between the steel frames that form the steel tower and extends coaxially to the opposite side of the steel tower, and is provided on the outer periphery of the first support portion and is substantially horizontal from the outer periphery. And one or a plurality of second supporting portions extending in a circular shape, and the first opening is provided at a tip opening portion of a cylindrical pile that is vertically driven and erected at the installation location.
The support portion is integrally inserted with the second support portion, and in this state, the fixing material is filled in the tip end opening portion of the pile.

[0005]

In the basic structure of the steel tower having the above structure, the first support portion and the second support portion provided at the base end of the steel tower are provided.
The support part of is firmly fixed to the pile by the action of the fixing member filled in the opening of the cylindrical pile driven into the installation location, but in particular, the pile is located between the steel frames constituting the steel tower, and Due to the synergistic action of the second support portion provided on the outer periphery of the first support portion and extending in a substantially horizontal shape, and the fixing material, the steel tower is firmly supported against the swing in the left-right direction and the front-back direction. Therefore, if the basic structure is adopted, the distance between the steel frames forming the steel tower can be set smaller than before, and the base part of the installation site can be set correspondingly smaller and used. A minimum of one pile is sufficient, and the number of piles used can be significantly reduced. Further, due to these effects, the installation work of the steel tower is facilitated and the construction cost can be reduced.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIGS. 1 and 2 show the essential parts of the basic structure of a steel tower according to the present invention. The iron tower 10 is the iron tower shown in FIG. 5 in which a ball-proof net of a golf course is stretched, and has a height of about 50 m in which five iron tower portions 10a to 10e are coaxially connected. Further, each of the steel tower parts 10a to 10e has about 1
It is formed to have a length of 0 m, and the basic structure according to the present invention is adopted in the first steel tower portion 10a on the lowermost end side.

As shown in FIG. 5, each of the steel tower parts 10a to 10e has three pipe-shaped steel frames 11a to 13a and 11b to.
13b, 11c to 13c, 11d to 13d, 11e to 1
3e and a large number of connecting portions connecting these in a cross-linking manner. In each steel frame of each steel tower part 10a-10e, the second and third steel frames 12a-12e, 13a-13e are located in a triangular shape with the large-diameter first steel frame 11a-11e as the apex. The steel tower parts 10a to 10e are joined to each other by flange parts 11f and 11g provided at the tips or flange parts similar thereto, as shown by the first steel tower part 10a in FIGS. 3 and 4 as a representative example. Are connected.

In the steel tower 10, however, the first
A support member 14 is fixed to the base end of the steel tower 10a as shown in FIGS. The support member 14 includes a pair of upper and lower support plates 14a and 14b, and both support plates 14a and 14b.
Connection pieces 14c to 14 for connecting a and 14b in the vertical direction
e, a cylindrical pillar 14f, and a large number of arm portions 14g extending from the outer circumference of the pillar 14f. In this support member 14, both upper and lower support plates 14a, 1
First steel frame 11a, second steel frame 12a in a state of penetrating 4b
And the third steel frame 13a are fixed, and the support 14
Similarly, f is fixed to the support plates 14a, 14b in a state of vertically penetrating both support plates 14a, 14b. The first steel frame 11a and the second or third steel frame 11b,
The distance between the 11c is set to 1.8m, and the distance between the second steel frame 11b and the third steel frame 11c is set to 1.3m.

In the support member 14, the support column 14f
The arm portion 14g corresponds to the first support portion and the second support portion of the present invention, and the column 14f extends 1 m below the support plate 14b.
4 g of four columns are provided at four equally spaced locations on the outer periphery of the support post 14f so as to protrude in the vertical direction at seven predetermined intervals and extend horizontally. The pillar 14f has a diameter of 50 cm, and the arm portion 14g has a diameter of 1.6 cm and a length of 8 cm.

On the other hand, a concrete containing box 21 is embedded in the installation place of the steel tower 10 and a cylindrical pile 22 is driven therein. The pile 22 penetrates the bottom of the storage box 21 and faces the center of the storage box 21, and a bottom plate 22a is provided below the opening end by a predetermined amount. The stake 22 has a diameter of 81 cm and a length of m. Such a storage box 2
1, the support member 14 provided in the first steel tower part 10a is accommodated, the pillar 14f of the support member 14 is integrally inserted with the arm part 14g from the open end of the pile 22, and the bottom part of the accommodation box 21 is accommodated. Each of the support plates 14a and 14b is supported by a large number of bolts 23 standing upright. The storage box 21 and the pile 22 are filled with concrete 24, and the first steel tower part 10a is supported in this state. The tower 1
In No. 0, the 2nd iron tower part 10b is connected to the upper end part of the said 1st iron tower part 10a, and also the 3rd, 4th, and 5th iron tower parts 10c-10e are connected one by one.

In the support structure for the steel tower 10 having such a structure, the support box 14f constituting the support member 14 provided at the base end portion of the first steel tower portion 10a and the plurality of arm portions 14g are formed at the installation place in the storage box 21. Although it is firmly fixed to the pile 22 by the action of the concrete 24 filled in the inside and the opening of the pile 22, the pile 22 is particularly located between the steel frames 11a to 11c forming the first steel tower part 10a, and 14
A large number of arm portions 14 provided on the outer periphery of f and extending substantially horizontally.
By the synergistic action of g and concrete 24, the steel tower 10
Is firmly supported against its left-right and front-back shaking.

Therefore, if the basic structure is adopted, the interval between the steel frames 11a to 11c constituting the first steel tower part 10a can be set smaller than before, and the foundation of the installation place correspondingly can be set. Part, that is, the flat area of the storage box 21 can be set small, and the pile 2 to be used
The number of the piles to be used can be remarkably reduced, since the number of 2 and the minimum of 1 are sufficient. Further, due to these effects, the installation work of the steel tower 10 can be facilitated and the construction cost can be reduced.

[Brief description of drawings]

FIG. 1 is a partial vertical cross-sectional side view of a basic structure of a steel tower according to the present invention.

FIG. 2 is a plan view of the basic structure.

FIG. 3 is a side view (a) and another side view (b) of a first steel tower part that constitutes a steel tower installed by adopting the basic structure.

FIG. 4 is a bottom view (a) and a plan view (b) of the first steel tower section.
Is.

FIG. 5 is a side view (a) and another side view (b) of a steel tower installed by adopting the same basic structure.

FIG. 6 is a vertical sectional side view (a) and a plan view (a) of a conventional basic structure.

[Explanation of symbols]

10 ... Iron tower, 10a ... 1st iron tower part, 10b ... 2nd iron tower part, 10c ... 3rd iron tower part, 10d ... 4th iron tower part, 10e
... 5th steel tower part, 11a-11e ... 1st steel frame, 12a-1
2e ... 2nd steel frame, 13a-13e ... 3rd steel frame, 14 ... Support member, 14a, 14b ... Support plate, 14f ... Strut, 14g ... Arm part, 21 ... Storage box, 22 ... Pile, 23
… Bolts, 24… Concrete.

Claims (1)

[Claims] 1. A basic structure of a steel tower in which a base end portion in the longitudinal direction is fixedly erected on a base portion provided at an installation place, and the base end portion of the steel tower is between steel frames constituting the steel tower. A rod-shaped first supporting portion provided coaxially with the steel tower and extending coaxially to the opposite side, and one or a plurality of second supporting portions provided on the outer periphery of the first supporting portion and extending substantially horizontally from the outer periphery. The first support portion is inserted integrally with the second support portion into the tip opening of a cylindrical pile that is vertically driven into the installation location and is erected vertically. In this state, a fixing material is filled in the tip opening of the pile, and the foundation structure of the steel tower is characterized.