JP4309783B2 - Reinforcement structure with welded round material for reinforcing hollow steel tube tower - Google Patents

Description

  The present invention relates to a reinforcing structure that reinforces a hollow steel tube tower with an adjoining round member, and more particularly to a reinforcing structure that improves the compression or tensile strength of the main column material of the hollow steel tube tower.

In recent years, the frequency of large typhoons has increased. In addition, it has been clarified by numerical analysis such as airflow simulation and wind tunnel experiments that strong winds are accelerated by local topography.

Under such circumstances, there is an increasing need for wind-resistant reinforcement of hollow steel pipe towers used for large-capacity power transmission among existing power transmission towers. In particular, it is considered difficult to replace locally, and reinforcement of the main column material of the hollow steel pipe tower, which has hardly been reinforced in the past, has come to be emphasized.
JP 2003-321948 A Japanese Patent Laid-Open No. 2003-074213

  Reinforcement structure of main column material that improves wind resistance performance, especially compressive or tensile strength, by installing attachment round material, etc. without performing on-site processing such as drilling, cutting, welding, etc. for main column material of existing hollow steel tube Obtaining is the solution to the present invention.

The hollow steel pipe tower to which the present invention is to be applied is between a main pillar material that extends in the height direction from each corner of a square base surface and is connected to a forged flange by bolting at a predetermined interval, and an adjacent main pillar material. crossing a horizontal web members extending in the horizontal direction, and the diagonal direction extending long diagonal web members between adjacent main pillar, extend diagonally opposite between adjacent main pillar, the central portion of the long diagonal web members consisting of the the short diagonal belly material. However, the horizontal abdomen is selectively provided as necessary. The present invention, the lower end of such a hollow steel pipe for a steel tower, a pair vertical dividing the support plate to be bolted in hollow steel tower reinforcing construction site in upper forging flange of the main pillar, the main pillar a vertical split under the support plate of the pair to be bolted at reinforcing the construction site in forging flange, an upper support plate reinforcing ribs which is previously welded to the lower surface of the upper support plate, pre-welded to the lower surface of the upper support plate a cross groove joint after being, a lower support plate reinforcing rib which is previously welded to the lower surface of the lower support plate, a lower cross groove joint which is previously welded to the upper surface of the lower support plate, between the upper and lower support plates 1 pair and spliced roundwood that should be provided at the reinforcing construction site on both sides of the main pillar, ing from the upper and lower cross protrusion which is previously welded to the upper and lower ends of the respective spliced round material. Vertical cross protrusion is fitted in the reinforcing construction site in the vertical cross groove joint, Ru bolted.

  Here, “upper” or “lower” refers to the positional relationship in the height direction of the steel tower with respect to the square base surface of the hollow steel pipe steel tower. Further, “vertical” refers to the longitudinal direction of the divided support plate.

  In order to reduce the occurrence of stress on the flange bolt portion that fixes the upper and lower support plates to the upper and lower forged flanges, the upper and lower support plates are divided vertically. If the horizontal direction (width direction, that is, the direction perpendicular to the vertical direction) is divided, the generation of stress on the flange bolt portion cannot be reduced.

  A bending moment is generated in the upper and lower support plates because the contact round member is positioned outside the flange bolt portion with respect to the main column member. In order to counter this moment, vertical support plate reinforcing ribs are welded to the lower surface of the vertical support plate. The reason why the reinforcing ribs are provided on the lower surface of the support plate is to prevent the accumulation of rainwater, the accumulation of dust and the like, the creation of bird's nests, and the like.

Spliced round material reinforced assembly formed in advance is provided several places at intervals in the longitudinal direction of the added contact round material. The accessory round member reinforcement assembly includes a pair of detachable split bands to be sandwiched around the outer periphery of the main column member at the reinforcement work site , a first flange extending radially outward from the center of the band, and an attachment round member. consists of a second flange which is previously upstanding welded to the outer surface, a first flange and second flange are connected by a bolt and a nut in the reinforcing construction site.

When reinforcing the compressive strength of the main column material, a pair of vertically divided upper support plates are bolted to the lower surface of the upper end forged flange of the main column material to be reinforced at the reinforcement work site , The divided lower support plate is bolted to the upper surface of the lower end forged flange of the main column member to be reinforced at the reinforcement work site , thereby reinforcing the compressive strength of the main column member. On the other hand, in the case of reinforcing the tensile strength of the main pillar, the reinforcing construction site on the upper surface of the lower end forged flange of primary post material pair vertical dividing the support plate is adjacent the upper forging flange of the main column material to be reinforced at bolted, also bolted at reinforcing the construction site to the lower surface of the upper forging flange of primary post material pair vertical dividing under the support plate is adjacent to the lower end forged flange of the main column material to be reinforced, which To reinforce the tensile strength of the main pillar material.

According to the reinforcing structure of the connecting round material for reinforcing the hollow steel pipe tower of the present invention, the upper and lower forged flanges of the adjacent main column members are supported by a pair of the connecting round members, so that the main column material is compressed or compressed. Increases the tensile strength. In addition, new parts will be cut, drilled, welded, etc. in advance at the factory, so the components of the existing hollow steel pipe tower will not be subjected to any on-site processing and simple assembly with bolts and nuts. Reinforcement work is completed by work alone. The splicing material itself is also reinforced by the splicing material reinforcement assembly.

With reference to the drawings, a description will be given of an embodiment of a reinforcing structure using an attachment material for reinforcing a hollow steel pipe tower according to the present invention.

First, in FIGS. 1 and 2, a hollow steel pipe tower 10 to which the present invention is applied includes a main column 1 extending in a height direction from each corner of a square base surface 20 and a horizontal direction between adjacent main columns 1. The horizontal abdominal material 2 that extends, the long diagonal abdominal material 3 that extends obliquely between the adjacent main columnar materials 1, and the opposite diagonal direction that extends between the adjacent main columnar materials 1, It consists of short diagonal abdomen 4, 4 that intersect. However, the horizontal web 2 is selectively provided as necessary. 1 and 2, show existing hollow steel pipe steel tower 10 of the present invention is applied, except for the configuration described below, Nra is no difference, such Te conventional hollow steel tower and the basic configuration smell.

Reinforcing structure according spliced material for reinforcing a hollow steel tube tower of the present invention, as best shown in Figure 3-7, for the empty steel tower 10 in the above, the upper end forged flange 11 of the main pillar 1 bolted in hollow steel towers reinforcing the vertical dividing the support plate 5, 5 a pair to be bolted at construction sites (4 and 5), reinforcing the construction site to the lower forging flange 12 of the main pillar 1 a pair of vertical dividing under the support plate 6, 6 to be a (FIGS. 6 and 7), supported on which is previously welded to the lower surface of the upper support plate 5,5 plate reinforcing ribs 51 and 51 (FIGS. 3 and 5) And upper cross groove joint portions 52 and 52 (FIGS. 3 and 5), which are fixed to the lower surfaces of the upper support plates 5 and 5 in advance by welding, and lower support plate reinforcement which is fixed to the lower surfaces of the lower support plates 6 and 6 in advance by welding. Ribs 61 and 61 (FIGS. 3 and 7) and lower support plates 6 and 6 Under cross groove joint is previously welded to the upper surface 62 and 62 (FIG. 3,6), a pair of to be provided at the reinforcing construction site both sides of the main pillar 1 between the upper and lower support plates 5 and 6 and spliced round material 7,7 (FIGS. 1 and 3), consisting of upper and lower is previously welded to the end vertical cross impact force 8 of the spliced roundwood 7, 8 (Fig. 10 and 12).

As best shown in FIGS. 5 and 10, the upper cross groove joint portion 52 includes a base plate 521 which is preliminarily welded and fixed to the lower surface of the vertically divided upper support plate 5, a high-strength bolt frictionally bonded to the base plate 521, and the upper cross groove joint portion 52. consisting connecting plate 522 to be high-strength bolted joint at reinforcing the construction site in a cross collision caused 8. Under cross groove joint 62, As best shown, the vertical dividing the substrate 621 which is previously welded perpendicularly to the upper surface of the support plate 6, the lower and the high strength bolt friction bonded to the substrate 621 in FIG. 6 and 10 consisting connecting plate 622 Metropolitan to be high-strength bolted joint at reinforcing the construction site to the protruding joint portion 8.

As best shown in FIG. 3, 8, 9, bears against round material reinforcement assembly 9 is provided in Appendix tangent round material 7, 7. There are several places (two places in FIG. 3) of the accessory round member reinforcement assemblies 9 at intervals in the longitudinal direction at the site of reinforcement work of the accessory round member 7 . Spliced round material reinforcement assembly 9, sandwiching the outer periphery of the main pillar 1, a conventional bolt and nut of Rubeki pair are fixed by reinforcing construction site by a (not shown) removable split bands 91 and 91 A first flange 911 extending radially outward from the center of each band 91, and a second flange 71 fixed upright on the outer surface of the splicing material 7 in advance . The first flange 911 and the second flange 71 Are coupled by conventional bolts and nuts (not shown) at the reinforcement work site .

When reinforcing the compressive strength of the main column 1, as shown in FIG. 3, a pair of vertically divided upper support plates 5, 5 are reinforced on the lower surface of the upper end forged flange 11 of the main column 1 to be reinforced. The bolts are bolted at the site , and the pair of vertically divided lower support plates 6 and 6 are bolted to the upper surface of the lower end forged flange 12 of the main column 1 to be reinforced at the site of reinforcement work. The compressive strength of the material 1 is reinforced. On the other hand, when reinforcing the tensile strength of the main column 1, as shown in FIG. 13, a pair of vertically divided upper support plates 5, 5 are adjacent to the upper end forged flange 11 of the main column 1 to be reinforced. Bolts are fixed to the upper surface of the lower end forged flange 12a of the main column 1a at the reinforcement work site , and a pair of vertically divided lower support plates 6 and 6 are adjacent to the lower end forged flange 12 of the main column 1 to be reinforced. The main pillar 1b is bolted to the lower surface of the upper end forged flange 11b at the reinforcement work site , thereby reinforcing the tensile strength of the main pillar 1.

In the reinforcement work, the overall height of the hollow steel pipe tower 10, or in necessary positions, first, after a temporary reinforced by reinforcing the construction site in a conventional temporary support (not shown), the upper and lower adjacent main pillar 1 The bolts and nuts holding the end forged flanges 11 and 12 are removed from the upper and lower forged flanges 11 and 12 at the reinforcement work site, and the upper support plates 5 and 5 and the lower support plates 6 and 6 are respectively attached to the forged flanges 11 and 12. At the site of reinforcement work with bolts and nuts. Then, the spliced round material 7,7 are arranged at the reinforcing construction site on both sides of the main column material 1 to be reinforced, connected to the upper and lower cross collision caused 8, 8, the upper and lower cross groove joint portion 52, 62 plate 522 , 622, and high-strength bolts (not shown) are friction bonded at the reinforcement work site (in order to prevent stress reduction of the attached round material due to bolt sliding). At the required construction site of the main pillar 1, the attachment round member reinforcement assembly 9 is attached at the site of reinforcement work , and is connected and fixed to the attachment round members 7 and 7. Finally, the temporary support material is removed.

It is a partial side view of the hollow steel pipe tower to which the reinforcement structure by the attachment round material for reinforcing the hollow steel pipe tower of the present invention is applied. It is a top view of a part of hollow steel pipe tower seen from the II-II line of FIG. It is a partial expanded side view of the hollow steel pipe tower shown in FIG. 1, Comprising: One Example of the reinforcement structure of this invention is shown. It is a cross-sectional view of the reinforcing structure seen from the IV-IV line of FIG. It is a cross-sectional view of the reinforcing structure seen from the VV line of FIG. It is a cross-sectional view of the reinforcement structure seen from the VI-VI line of FIG. It is a cross-sectional view of the reinforcement structure seen from the VII-VII line of FIG. It is a cross-sectional view of the spliced round material reinforcing assembly viewed from the line VIII-VIII in FIG. It is a front view of the division | segmentation band seen from IX-IX of FIG. FIG. 4 is a partially enlarged side view of the right half of the reinforcing structure in FIG. 3. It is a top view of the edge part of the accessory round material in FIG. It is a perspective view of the edge part of the attachment round material in FIG. It is a partial expanded side view of the hollow steel pipe tower shown in FIG. 1, Comprising: Another Example of the reinforcement structure of this invention is shown.

Explanation of symbols

1, 1a, 1b main pillar 2 horizontal web members 3 long diagonal web members 4 short diagonal web members 5 longitudinally divided on the support plate 6 vertically divided under the support plate 7 bears against round material 8 vertical cross butt raising 9 spliced round material reinforcing set Body 10 Hollow steel tube tower 11, 11b Upper end forged flange 12, 12a Lower end forged flange 20 Square base surface 51 Upper support plate reinforcing rib 52 Upper cross groove joint portion 61 Lower support plate reinforcing rib 62 Lower cross groove joint portion 71 Second flange 91 Dividing bands 521, 621 Substrate 522, 622 Connecting plate 911 First flange

Claims (5)

The hollow steel pipe tower extends in the height direction from each corner of the square foundation surface and extends horizontally and is selected between the main pillar material connected by forging flanges with bolts at predetermined intervals and the adjacent main pillar material. A horizontal abdominal material provided in an oblique direction, a long diagonal abdominal material extending in an oblique direction between the adjacent main column members, and an opposite diagonal direction extending between the adjacent main column members, Ri Do and a short diagonal web members which intersects the central, the reinforcing structure according spliced roundwood for reinforcing the hollow steel tube tower,
A vertical split on the support plate of the pair to be bolted in hollow steel tower reinforcing construction site in upper forging flange of the main pillar,
A vertical split under the support plate of the pair to be bolted at the lower end forged flange on the reinforcing construction site of the main pillar,
An upper support plate reinforcing rib which is preliminarily welded to the lower surface of the upper support plate;
An upper cross groove joint part which is fixed by welding to the lower surface of the upper support plate in advance ;
A lower support plate reinforcing rib that is pre-welded to the lower surface of the lower support plate;
A lower cross groove joint part which is fixed in advance to the upper surface of the lower support plate;
A pair of attachment round members to be provided at the reinforcement work site on both sides of the main pillar material between the upper and lower support plates;
It consists of upper and lower cruciform protrusions welded and fixed in advance to the upper and lower ends of each accessory round material
A reinforcing structure using an attachment round material for reinforcing a hollow steel pipe tower, in which the upper and lower cross protrusions are fitted and bolted to the upper and lower cross groove joint portions at the reinforcing work site . The reinforcing structure according to claim 1, wherein a plurality of preformed accessory round material reinforcing assemblies are provided at intervals in the longitudinal direction of the accessory round material . The spliced round material reinforcement assembly, and the main pillar removable split band periphery of scissors write Mbeki pair in said reinforcing construction site, first extending diametrically outward from the center portion of the band A flange and a second flange that is preliminarily welded and fixed to an outer surface of the spliced round member, and the first flange and the second flange are coupled to each other by bolts and nuts at the reinforcement work site. Item 3. The reinforcing structure according to Item 2 . The pair of vertically divided upper support plates are bolted to the lower surface of the upper end forged flange of the main pillar material to be reinforced at the reinforcement work site , and the pair of vertically divided lower support plates are the main pillar to be reinforced. The reinforcing structure according to claim 1, wherein bolts are bolted to the upper surface of the lower end forged flange of the column material at the reinforcement work site , thereby reinforcing the compressive strength of the main column material. Wherein 1 vertical dividing the support plate pairs are bolted in said reinforcing construction site on the upper surface of the lower end forged flange of primary post member adjacent the upper end forged flange of the main column material to be reinforced, The vertical of the pair split under the support plate is bolted to the lower surface of the upper forging flange at the reinforcement construction site primary post member adjacent the lower end forged flange of the main column material to be the reinforcement, thereby reinforce the tensile strength of the main pillar The reinforcing structure according to claim 1.

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