JP3172154B2 - Tower assembly scaffolding and tower assembly method - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION The present invention relates to a steel tower having various structures, in particular, to use a column member in which a beam portion is welded in advance to an iron column provided with connecting flange portions at upper and lower ends, and a gap between adjacent members is used. The present invention relates to an assembling method for a steel tower formed by connecting a connecting plate and a connecting bolt and nut to form a tower main body, and an assembling scaffold used in the assembling method.

[0002]

2. Description of the Related Art As shown in FIG. 2, a steel tower structure to which the present invention is applied is provided with connecting flange portions 2 at upper and lower ends of a steel pillar 1 made of a steel pipe. 1 uses a member A in which the beam 3 is welded in advance. In the assembly, first, each steel pole is erected on the foundation (the flange part 2 of the steel pole is connected using anchor bolts laid on the foundation), and the connecting plate is connected between the beam parts 3 of the adjacent members. In addition, the overlapping connecting plate and the beam portion are penetrated by the connecting bolts, the nuts are tightened, and the beam portions are integrated to form a tower structure for the first node. Next, in assembling the second section, the column member A is caught, and the members A are stacked on the upper ends of the steel columns of the tower structure of the assembled first section, respectively, and the flange portions between the upper and lower iron columns are connected. Then, the beam sections of the adjacent members are connected to form a second section, and this is repeated from the third section onward. This is repeated until a predetermined height is reached, and the target structure of the tower is assembled at the top. .

An operator of the assembling work stands on the uppermost beam of the assembled tower structure, instructs a crane operator on a lifting position of the column member, and connects a connecting bolt and a tightening member at an appropriate position. After the nut is attached and the vertical connection of the members is completed, the connection between the beams is performed while climbing on the beams of the connected members and sitting on the beams.

[0004] Accordingly, each of the above-mentioned connecting works is performed at a high place, which is extremely dangerous, and the work is performed on an unstable narrow place as a foothold, so that the working efficiency is reduced.

Accordingly, the present invention proposes a new construction method for assembling a steel tower having the above-mentioned structure and a scaffold used in this construction method.

[0006]

A scaffold for assembling a steel tower according to the present invention includes a notch which can be fitted from the outer periphery of a beam projecting portion of the iron column of the column member A, and the iron pole is positioned within the notch. A scaffold plate portion that overlaps with the upper surface of the beam at the time, and a handrail portion is erected in the outer peripheral range of the scaffold plate portion that becomes the outer periphery of the steel tower when the steel pillar is positioned in the cutout portion. is there.

In the tower assembling method according to the present invention, a section of a tower mainly composed of the column member A is assembled, and the scaffold is positioned in a notch of the scaffold plate portion, and the scaffold plate portion is positioned at the uppermost portion. It is placed on the upper surface of the beam to be connected and connected, and the section with the scaffold is lifted by a crane or the like and sequentially assembled by connecting the flange portions of the upper and lower iron poles, and the connection work was assembled first. It is characterized in that the connecting work of the steel pole is performed using the steel tower scaffold provided in one section.

[0008] Accordingly, the connection work between the beam portions of the adjacent members can be performed on the ground, and the stacked connection of one assembled node is also performed by the worker located on each scaffold.
It is possible to safely and easily perform the position adjustment of a plurality of lines at the same time.

[0009]

Next, an embodiment of the present invention will be described. Among the members used for assembling the steel tower shown in the embodiment, the column member A that is the main component of the tower structure is shown in FIG.
The connecting flange portions 2 are provided at the upper and lower ends, and the beam portions 3 are welded to the iron poles 1 in advance. Particularly, the beam portion 3 is made of H steel having an upper side, a lower side, and an intermediate vertical side, and protrudes in the direction of the adjacent iron column when the iron column 1 is arranged in three or four directions. Other members used for connecting the column members include a connecting bolt B, a tightening nut C, a connecting plate D, and a scaffold E used for assembling work, which is a feature of the present invention, and a clamp used for fixing the scaffold E. It consists of metal fittings F.

The scaffold E is provided with a scaffold plate portion 4 and a handrail portion 5 as illustrated in FIG. 1, and the scaffold plate portion 4 has an outer periphery of a projecting portion of the beam portion 3 of the iron column 1 of the column member A. It has a notch 41 that can be fitted from the side, and is formed in a shape that overlaps with the upper surface of the beam 3 when the iron column 1 is positioned in the notch 41. The railing 5 is a combination of a vertical rod 51 and a horizontal rod 52. When the iron pole 1 is positioned in the notch 41 of the scaffold plate 4, the scaffold plate becomes an outer peripheral side of the iron pole 1. 4, the lower end of the vertical rod 51 is welded and erected.

The holding fixture F has a structure for holding and connecting the scaffold plate portion 4 and the beam portion 3 when the upper sides thereof are overlapped with each other, for example, like a Bullman jig.

For assembling a steel tower, first, a steel tower foundation (construction of a gantry) is constructed, and anchor bolts are erected on the foundation (frame) to construct a first section. In this construction, each column member A is erected as before, a connecting plate D is attached between the beam portions 3 of the adjacent member A, and the overlapping connecting plate D and the beam portion 3 are penetrated by the connecting bolt B. Then, tighten the nut C to build the first node. This construction work is carried out on a workbench of an aerial work vehicle on the ground. In particular, when constructing the first joint, the scaffold E is attached to the uppermost beam 3 of the member A. The scaffold E is mounted on the upper surface of the beam portion 3 in which the iron pole 1 of the member A is located in the notch 41 provided at the center of the scaffold plate portion 4 and both end portions of the scaffold plate portion 4 are at the top. Placed on
Clamp F
To fix the scaffold E to the column member A.

Next, the second node is constructed on the first node. The second node is previously constructed on the ground by the column member A of the second node.
And the scaffold E is fixed to the uppermost beam 3. The assembled second node is lifted by a crane truck and positioned above the first node, and the uppermost flange portion 2 of the first node and the lowermost flange portion 2a of the second node are connected to the connecting bolt B and the tightening nut C. The alignment work and the connection work are performed on the scaffold E incorporated in the first section. The third and subsequent sections are similarly constructed up to the top section. Note that the uppermost section forms the target structure of the tower structure, and since there is no subsequent stacking and assembling work, the scaffold E is naturally not incorporated.

The scaffold E after the construction is completed can be easily separated from the column member A by removing the holding member F.
It is collected on the ground by hanging with a crane. Further, although the embodiment example shows a tripod tower having three pillar members, the invention is also applicable to other leg towers such as a quadruple tower and a pentapod tower.

[0015]

As described above, according to the present invention, a member having a beam portion welded in advance to an iron pole having connection flange portions at upper and lower ends is used, and beams between adjacent members are connected with a connection plate and a connection bolt nut. In a tower constructed by assembling a tower main body, particularly, a scaffold suitable for the construction of the tower and a tower assembling method using the scaffold are used. Since it was performed on E, what could be done only by connecting the column members of each node alone for complicated work, it was possible to perform each assembled node together, and moreover, the ground of each node As a result of the assembling, the connection work between the beam parts, which was the work at a high place, was changed to the ground work, thereby improving safety and improving work efficiency by reducing the work at a high place.

[Brief description of the drawings]

FIG. 1 is an overall perspective view of a scaffold according to an embodiment of the present invention.

FIG. 2 is an overall perspective view of the column member.

FIG. 3 is a plan view of the scaffold attached.

FIG. 4 is an explanatory view (front view) of a main part of the assembling work.

[Explanation of symbols]

 A Column member A 1 Iron column 2 Flange part 3 Beam part B Connection bolt C Tightening nut D Connection plate E Scaffold 4 Scaffold plate 41 Notch 5 Handrail 51 Vertical rod 52 Horizontal rod F Clamping bracket

Claims (3)

(57) [Claims] 1. A tower main body is assembled by using a member in which a beam portion is welded in advance to an iron pole having a connecting flange portion provided at the upper and lower ends, and connecting beams between adjacent members with a connecting plate and a connecting bolt and nut. In a steel tower, a notch portion that can be fitted from the outer periphery of a beam projecting portion of an iron column is provided, and a scaffold plate portion that overlaps with a beam upper surface when the iron column is positioned in the notch portion, and an iron column is positioned in the notch portion. A scaffold for assembling a steel tower, wherein a handrail is erected in an outer peripheral area of a scaffold plate part which becomes an outer periphery of the steel tower when the steel tower is assembled. 2. A tower main body is assembled by connecting members between adjacent beams with connecting plates and connecting bolts and nuts using a member to which beams are welded in advance to an iron pole provided with connecting flange portions at upper and lower ends. In the steel tower, the beam of the adjacent member is connected on the ground to assemble a section of the steel tower main body, and the scaffold according to claim 1 is located in the notch of the scaffold plate portion, and the steel scaffold plate portion is located at the bottom. Placed and connected on the upper surface of the beam to be the upper part, when lifting the above scaffolding section with a crane etc. and assembling it sequentially by connecting the flanges of the upper and lower iron poles, provide it in the previously assembled section A method for assembling a steel tower, comprising connecting a steel pole using a steel tower scaffold. 3. The method of assembling a steel tower according to claim 2, wherein the connection of the scaffold to the beam is carried out by holding the scaffold plate portion and the overlapped surface of the beam with a suitable holding bracket.