JP5563527B2 - Steel tube tower reinforcement structure - Google Patents

Description

  The present invention relates to a reinforcing structure for steel pipe towers such as power transmission towers and communication towers.

  Many steel towers with steel pipes as the main structural material have been built throughout the country, such as power transmission towers and communication towers. These steel towers need to be reinforced when an unexpected load is expected to be applied to a specific member after construction, or when strength reduction due to aging is expected.

  For example, Patent Document 1 describes a reinforcing structure for a main pillar material of a steel pipe tower as a reinforcing structure therefor. In this structure, each support plate is fixed with bolts and nuts to both end flanges of a steel pipe (main column steel pipe) that constitutes the main column material, and a pair of steel pipe reinforcements are attached to both sides in the radial direction of the main column material steel pipe. The upper and lower ends of these steel pipe reinforcing members are respectively fixed to the respective support plates with bolts and nuts, and a plurality of longitudinal portions of each steel pipe reinforcing member and the main columnar steel pipes are fixed to each other by a fixing member called a band.

JP 2005-248487 A

  It is desirable that the reinforcement work for power transmission towers, etc. has good workability because the surrounding environment is bad, such as in the mountains, and there are many work in high places. However, in the above-described conventional reinforcing structure, the bolts fixing the flange portions of the main column steel pipes adjacent to each other in the vertical direction are removed, and the support plate is overlapped with the flange portion, and then the flange portion and the support plate are renewed. Tighten together with bolts and nuts, thereby fixing the support plate to the flange. In addition, since it is necessary to fix the steel pipe reinforcement to the upper and lower support plates with bolts and nuts, excessive time and labor are required for the construction. In particular, the bolts and nuts that fasten the flanges of the main column steel pipes are firmly fastened, and often involve rusting or painting. Requires technology.

  In addition, reinforcement of the steel pipe tower is not necessarily limited to the main column material, but may be required for abdominal materials such as diagonal materials and horizontal materials. However, the reinforcing structure described in Patent Document 1 is intended to reinforce the main pillar material of the steel pipe tower and is not suitable for reinforcing the abdominal material. Therefore, a reinforcing structure that can obtain high reinforcement strength and good workability is also desired for the abdominal material.

  This invention is made in view of such a situation, and relates to the reinforcement structure of steel pipe towers, such as a power transmission tower and a communication tower, and it aims at improving workability, ensuring high reinforcement strength. To do.

A steel pipe tower reinforcing structure according to one aspect of the present invention for solving the above-described problem is that a plurality of main columnar steel pipes having a steel pipe main body part and flange parts integrally formed at both ends thereof are connected to each other in the longitudinal direction. It is a reinforcement structure of the main column material of the steel pipe tower including the main column material configured by being, a plurality of three or more places around the main column material steel tube and arranged at equal intervals in the circumferential direction A plurality of reinforcing members extending in the longitudinal direction along the main column steel pipe at a position, and members for fixing the reinforcing members to the main column steel pipe, the plurality of reinforcing members in the longitudinal direction of the main column steel pipe A plurality of fixing members respectively fixed on the outer peripheral surface of the main columnar steel pipe at the position, and the fixing member includes a plurality of plate-shaped reinforcing material attaching portions extending radially, each timber, a pair of angle members of L-shaped cross-section The pair of angle members are arranged so that the reinforcing member mounting portions of the respective fixing members are sandwiched in the thickness direction, and the reinforcing material mounting portions are arranged from the inner side toward the outer side in the radial direction of the main columnar steel pipe. Are overlapped with each of the reinforcing material mounting portions so as to extend in directions away from each other at the front end side of the reinforcing member mounting portion, and are directly fastened with bolts and nuts to the respective reinforcing material mounting portions, Each angle member is fixed only to a steel pipe main body portion of the main columnar steel pipe through the fixing member at a plurality of positions in the longitudinal direction.

  According to this reinforcing structure, it is possible to reinforce the main column member by a buckling stiffening effect that is an effect of suppressing buckling deformation while appropriately applying a buckling load acting on the main column member to each reinforcing member. In addition, since each reinforcing material is fixed only to the steel pipe main body of the main column steel pipe, the work of fixing the reinforcing material to the flange of the main column steel pipe is not required during construction. In addition, since a plurality of reinforcing members are arranged at equal intervals at three or more positions around the main columnar steel pipe, a certain level of reinforcing strength is ensured. In particular, by arranging the reinforcing material in this way, the buckling stiffening effect is equalized over the entire circumference of the main columnar steel pipe, and it is possible to enjoy a high reinforcing effect against the buckling load. It becomes.

  Such a reinforcing structure is of course useful for a hollow steel pipe structure as a main column material, but concrete is filled inside the main column material steel tube (hereinafter referred to as MC material). It is also useful for steel pipe towers (hereinafter referred to as MC towers). In particular, in the case of MC material, local deformation is unlikely to occur in the main column material. Therefore, if the above-described reinforcing structure capable of obtaining a high reinforcing effect against buckling load is applied with a simple structure, the structure can be simplified. Therefore, it is possible to provide a reinforcing structure that balances the improvement of the workability of reinforcing work and the reinforcing effect.

Further, a steel pipe tower reinforcing structure according to another aspect of the present invention includes a plurality of main pillar materials, a steel pipe main body portion and connecting portions provided at both ends thereof, and the main pillar material via the connecting portions. It is a reinforcing structure of the abdominal material of the steel pipe tower including the abdomen to be connected, and is along the abdomen at a plurality of three or more positions around the abdomen and arranged at equal intervals in the circumferential direction. A plurality of reinforcing members extending in the longitudinal direction of the lever, and members for fixing the reinforcing members to the abdomen, the outer peripheral surface of the steel pipe main body of the abdomen at a plurality of positions in the longitudinal direction of the abdomen A plurality of fixing members fixed to each other, and the fixing member includes a plurality of plate-shaped reinforcing material mounting portions extending radially, and each of the reinforcing materials has a pair of angles each having an L-shaped cross section. The pair of angle members are made of the reinforcing material of each fixing member. A direction that extends along the reinforcing member mounting portion from the inner side to the outer side in the radial direction of the abdomen so as to sandwich the attachment portion in the thickness direction, and is separated from each other on the distal end side of the reinforcing member mounting portion Are overlapped with the respective reinforcing material attaching portions so as to extend to each other, and are directly fastened with bolts and nuts to the respective reinforcing material attaching portions, respectively, at a plurality of positions in the longitudinal direction of each angle member via the fixing members, respectively. It is fixed only to the steel pipe body of the abdomen. The “abdomen” means a member excluding the main pillar material, such as a diagonal member and a horizontal member, among shaft-like members constituting the steel pipe tower.

According to this reinforcing structure, the abdominal material can be reinforced by a buckling stiffening effect which is an effect of suppressing buckling deformation while appropriately applying a buckling load acting on the abdominal material to each reinforcing material. In addition, by arranging a plurality of reinforcing materials at equal intervals at three or more positions around the abdominal material, a certain level of high reinforcing strength is ensured, and in this way the reinforcing material is arranged, The buckling stiffening effect is equalized over the entire circumference of the abdomen, and it becomes possible to enjoy a high reinforcing effect against the buckling load .

  As described above, according to the steel tube tower reinforcing structure according to one aspect of the present invention, the main column material has a somewhat high reinforcing strength without the work of fixing the reinforcing material to the flange portion of the main column material steel pipe. Since it becomes possible to ensure, regarding the reinforcement structure of the main pillar material of steel pipe towers, such as a power transmission tower and a communication tower, workability can be improved, ensuring high reinforcement strength.

  In addition, according to the steel pipe tower reinforcing structure according to another aspect of the present invention, it is possible to secure a certain level of reinforcing strength by fixing to a steel pipe main body portion of an abdomen such as diagonal or horizontal material. In addition, it is possible to improve the workability while securing a high reinforcing strength for the abdominal material of the steel pipe tower such as the power transmission tower and the communication tower.

It is a side view which shows typically a part of steel pipe tower to which the reinforcement structure of this invention was applied. It is a principal part enlarged view of the steel pipe tower which shows the reinforcement structure of the main pillar material. It is the III-III sectional view taken on the line of FIG. It is a principal part enlarged view of the steel pipe tower which shows the reinforcement structure of a diagonal (abdominal material).

  Hereinafter, a preferred embodiment of the present invention will be described in detail with reference to the accompanying drawings.

  FIG. 1 schematically shows a part of a steel pipe tower to which the present invention is applied. The steel pipe tower shown in this figure includes, for example, a main column member 2 extending in the height direction from four corners of a square base surface, and an abdominal member 3 such as a diagonal member 3a and a horizontal member 3b provided between adjacent main column members 2. Including.

  As shown in the figure, the main pillar material 2 is constituted by connecting a plurality of main pillar material steel pipes 10 to each other in the longitudinal direction. As shown in FIG. 2, these main columnar steel pipes 10 have a steel pipe main body part 11 and flange parts 12 provided integrally at both ends in the longitudinal direction, and the main columnar steel pipes 10 arranged in the vertical direction. The main pillar member 2 is constructed by fastening the flange portions 12 with bolts and nuts outside the figure. In addition, each main pillar material steel pipe 10 is MC material.

  Further, a gusset plate (not shown) is integrally provided in the middle portion of the steel pipe main body 11 of the main columnar steel pipe 10 by means such as welding, and the end portion of the abdomen 3 is attached to the gusset plate. It is fixed.

  A part of the main pillar 2 of the steel pipe tower is reinforced by fixing a reinforcing member 22. 2 and 3 specifically show the reinforcing structure.

As shown in the figure, the main pillar is located at four positions around the specific main pillar steel pipe 10 constituting the main pillar 2, specifically at equal intervals (90 ° intervals) in the circumferential direction. Reinforcing members 22 extending along the longitudinal direction of the steel pipe 10 are disposed. Each reinforcing member 22 is fixed to the steel pipe main body 11 of the main columnar steel pipe 10 by fixing members 14 called bands at a plurality of positions in the longitudinal direction. In the present embodiment, each reinforcing member 22 is fixed to the steel pipe body 11 at seven positions in the longitudinal direction. In those embodiments, each reinforcement member 22, as shown in FIG. 3, Ru pair of angle members 24 der extending in the longitudinal direction of the main pillar steel pipe 10. On the other hand, as shown in FIG. 3, each fixing member 14 is composed of a pair of half-pipe split pieces 14a and 14b having flange portions 16 at both ends, and these split pieces 14a and 14b have the diameter of the steel pipe main body 11 as its diameter. After being arranged on the outer peripheral surface of the steel pipe main body part 11 so as to be sandwiched in the direction, the flange parts 16 are fastened to the steel pipe main body part 11 by fastening with bolts and nuts 18. On the outer peripheral surface of each fixing member 14, three or more (four in FIG. 3) plate-shaped reinforcing material mounting portions 20 are arranged in the circumferential direction at equal intervals and extend radially about the main columnar steel pipe 10. Projected. The pair of angle members 24 are overlapped with the reinforcing member attaching portions 20 of the fixing members 14 so as to sandwich the reinforcing member attaching portions 20 in the thickness direction, and then the angle members 24 are tightened by bolts and nuts 26. Are fastened to the reinforcing member attaching portion 20, whereby each reinforcing member 22 is fixed to the steel pipe main body portion 11 of the main columnar steel pipe 10 via each fixing member 14.

  The reinforcement of the main pillar material 2 with the reinforcing material 22 as described above can be performed by the following procedure, for example. First, each fixing member 14 is fixed to the steel pipe main body 11 of the main columnar steel pipe 10 at a predetermined interval. Next, after the angle members 24 of the reinforcing members 22 are fastened with bolts and nuts 26 to the fixing members 14 at both the upper and lower ends of the steel pipe main body 11 among the fixing members 14, the angle members 24 are fixed to the remaining fixing members 14. 24 are sequentially fastened by bolts and nuts 26. Finally, all the bolts and nuts 26 are fastened with a predetermined torque.

  According to the steel pipe tower reinforcing structure as described above, the main column member 2 can be reinforced by the buckling stiffening effect while appropriately applying the buckling load acting on the main column member 2 to each reinforcing member 22. it can. In addition, in this structure, each reinforcing member 22 is fixed only to the steel pipe main body 11 of the main columnar steel pipe 10 and each reinforcing member 22 is separated from the flange portion 12. There is no need to remove the bolts and nuts that fasten the flange portions of the upper and lower main column members 2, attach the reinforcing material to the flange portions, and re-fix the flange portions. This makes it possible to perform construction very easily. . In addition, as described above, the reinforcing members 22 are arranged at equal intervals around the four positions around the main columnar steel pipe 10, so that a certain level of reinforcing strength can be secured. In particular, according to such an arrangement of the reinforcing member 22, the buckling stiffening effect is equalized over the entire circumference of the main column member 2 (main column member steel pipe 10). It is possible to enjoy a high reinforcing effect. Therefore, according to this reinforcement structure, the workability can be improved while ensuring high reinforcement strength. In addition, from the viewpoint of equalizing the buckling stiffening effect over the entire circumference of the main column member 2 (main column member steel pipe 10), reinforcement is performed at equal intervals at three or more positions around the main column member steel tube 10. The material 22 may be arranged, but according to the structure in which the reinforcing material 22 is located at equal intervals at four or more even positions as in the embodiment, the divided pieces 14a and 14b constituting the fixing member 14 are used. There is an advantage that can be shared.

  In addition, in this embodiment, since the reinforcing structure is applied to a so-called MC steel tower in which the main column material steel pipe 10 (steel pipe main body 11) is used as the MC material as the main column material 2, there are the following advantages. That is, the main pillar material 2 which is an MC material itself has a high strength particularly against an axial load and is relatively difficult to be locally deformed. If the above-described reinforcing structure capable of obtaining the above is applied, it is possible to provide a reinforcing structure in which the workability of the reinforcing work is improved and the reinforcing effect is balanced.

  Further, according to this reinforcing structure, each reinforcing member 22 is made of a general angle member 24, and a fixing member is provided without providing a special joint structure except that a fixing bolt hole is formed. 14 can be fixed. Therefore, it is possible to manufacture the reinforcing material 22 easily and inexpensively, and there is also an advantage that the construction cost can be suppressed.

  Note that the above-described reinforcing structure by the reinforcing material 22 is not limited to the main pillar material 2 and can be similarly applied to the belly material 3 such as the diagonal material 3a and the horizontal material 3b. FIG. 4 shows an example.

  This figure is an enlarged view of a main part when the diagonal member 3a is reinforced by the reinforcing member 22 as shown by a two-dot chain line in FIG. As shown in the figure, the diagonal member 3 a has a steel pipe main body 30 and connecting portions 32 provided integrally at both ends in the longitudinal direction, and the connecting portion 32 with respect to the gusset plate 13 of the main columnar steel pipe 10. Are connected to the main pillar 2 by being fastened with bolts and nuts.

  Reinforcing members 22 are arranged around the steel pipe main body 30 of the diagonal member 3a, specifically, at four positions arranged at equal intervals (90 ° intervals) in the circumferential direction. It is fixed to the steel pipe body 30 by a fixing member 14 at a plurality of positions in the longitudinal direction. The basic structure of the reinforcing material 22 and the fixing member 14 is the same as that used to reinforce the main pillar material 2 (see FIGS. 2 and 3), except that the size is suitable for the diagonal material 3a. Therefore, the construction procedure can also be performed in the same procedure as the reinforcement of the main pillar material 2.

  According to such a reinforcing structure of the diagonal member 3a, the diagonal member 3a can be reinforced by its buckling stiffening effect while appropriately applying the buckling load acting on the diagonal member 3a to each reinforcing member 22. Moreover, since each reinforcing member 22 is fixed only to the steel pipe body 30 of the diagonal member 3a, it can be constructed very easily. Therefore, it is possible to enjoy the same operational effects as in the case of the reinforcing structure of the main column member 2 described above. While the reinforcing structure of the diagonal member 3a has been described with reference to FIG. 4, the same applies to other abdominal members 3 such as the horizontal member 3b.

  The above-described steel pipe tower and its reinforcing structure are exemplifications of preferred embodiments of the present invention, and the specific configuration thereof can be appropriately changed without departing from the gist of the present invention.

2 Main column material 3 Abdominal material 3a Diagonal material 3b Horizontal material 10 Main column material steel pipe 11 Steel pipe body part 12 Flange part 13 Gusset plate 14 Fixing member 22 Reinforcement material 24 Angle material 30 Steel pipe body part 32 Connection part

Claims (3)

Reinforcement of the main column material of a steel pipe tower including a main column material formed by connecting a plurality of main column material steel pipes having a steel pipe main body part and flange parts integrally formed at both ends thereof in the longitudinal direction thereof Structure,
A plurality of reinforcing members extending in the longitudinal direction along the main columnar steel pipe at a plurality of three or more positions around the main columnar steel pipe and arranged at equal intervals in the circumferential direction;
A plurality of fixing members for fixing these reinforcing members to the main columnar steel pipe, which are respectively fixed on the outer peripheral surface of the main columnar steel pipe at a plurality of positions in the longitudinal direction of the main columnar steel pipe Including
The fixing member includes a plurality of plate-like reinforcing material mounting portions extending radially,
Each of the reinforcing members is composed of a pair of angle members having an L-shaped cross section,
The pair of angle members are arranged along the reinforcing material attaching portions so as to sandwich the reinforcing material attaching portions of the respective fixing members in the thickness direction and from the inner side toward the outer side in the radial direction of the main columnar steel pipe. extending Te and to extend in a direction away from each other at the tip end of the reinforcing member mounting portion respectively superimposed on the reinforcing member mounting portion by being fastened directly by bolts nuts against each stiffener mounting portions, each angle A reinforcing structure for a steel pipe tower, wherein the steel pipe tower is fixed only to a steel pipe main body portion of the main columnar steel pipe through the fixing members at a plurality of positions in the longitudinal direction of the material.   The steel pipe tower reinforcement structure according to claim 1, wherein the main pillar material is an MC material in which concrete is filled inside the main pillar steel pipe. In the reinforcing structure of the abdominal member of the steel tube tower, including a plurality of main pillar members, a steel pipe main body part and a abdomen provided with connecting parts provided at both ends thereof and connected to the main pillar material via the connecting parts. There,
A plurality of reinforcing members extending in the longitudinal direction along the abdomen at a plurality of positions at three or more positions around the abdomen and arranged at equal intervals in the circumferential direction;
A member for fixing these reinforcing members to the abdomen, and a plurality of fixing members respectively fixed on the outer peripheral surface of the steel pipe body of the abdomen at a plurality of positions in the longitudinal direction of the abdomen. Including
The fixing member includes a plurality of plate-like reinforcing material mounting portions extending radially,
Each of the reinforcing members is composed of a pair of angle members having an L-shaped cross section,
The pair of angle members extend along the reinforcing material attaching portion from the inside to the outside in the radial direction of the abdomen so as to sandwich the reinforcing material attaching portion of each fixing member in the thickness direction. Each of the angle members by being overlapped with each of the reinforcing material mounting portions so as to extend in directions away from each other at the distal end side of the reinforcing material mounting portion, and being directly fastened to each reinforcing material mounting portion with a bolt and nut . A steel pipe tower reinforcing structure, wherein the steel pipe tower is fixed only to the steel pipe main body of the abdomen through the fixing members at a plurality of positions in the longitudinal direction .

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