JP2015229917A - Replacement device and replacement method for main column material of iron tower constituted of angle steel - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a replacement device and a replacement method for a main colum material that do not require chipping of concrete or excavation of the soil around a foundation body.SOLUTION: A replacement device for a main column material includes a fixture fixed on each of a plurality of neighboring main column materials connected on both ends of a main column material to be replaced, and a support member installed between the fixtures with a jack inserted. The fixture on at least one side is installed while being overlapped with a part of a lap joint, and includes: a plate-form connection metal fitting installed so as to come into contact with both flange surfaces of a neighboring main column material; a temporary fastening bolt inserted into a bolt hole of the lap joint of the neighboring main column material from a bolt hole of the connection metal fitting, the temporary fastening bolt having a nominal length that equals the total of the thicknesses of the connection metal fitting and the neighboring main colum material; a bolt holding metal fitting positioned so as to hold down a bolt head of the temporary fastening bolt, and connected to the connection metal fitting for holding the bolt head of the temporary fastening bolt from both sides; and a holding metal fitting connected with the connection metal fitting for holding the neighboring main column material from both sides.

Description

  The present invention relates to a main column material replacement device and a main column material replacement method for replacing a main column material of an angle steel tower.

  When the main pillar material of the Yamagata steel tower is damaged due to aging or disaster, such as corrosion or deformation, the damaged main pillar material is replaced. When replacing the main pillar material, a temporary track that bypasses the transmission path is provided, and the transmission line is removed from the steel tower to replace the main pillar material. There was a problem that it was expensive.

  In view of this, a construction method has been proposed in which the main pillar material of the steel tower is replaced while the transmission line is overhead. For example, an upper fixture that is fixed to the upper adjacent main column that is connected to the upper side of the replacement main column, and a lower fixture that is fixed to the lower adjacent main column that is connected to the lower side of the replacement main column. The main pillar material replacement device provided with a support member installed with a jack interposed between the upper fixing tool and the lower fixing tool, and the replacement main column material is pushed up by the jack. The main pillar material is replaced by removing the replacement main pillar material, inserting a new main pillar material, and assembling the new main pillar material (for example, patents) Reference 1). The upper and lower fixtures have a friction member and a clamp, and are fixed to the main column member by pressing the friction member and the main column member in close contact with each other.

  However, the main column material replacement method disclosed in Patent Document 1 is fixed to the lower adjacent main column material when the lower adjacent main column material connected to the lower side of the replacement main column material is embedded in the concrete foundation. Since the tool cannot be fixed, it is necessary to expose a part of the lower adjacent main pillar material with concrete, and there is a problem that it takes time and effort to work.

  Therefore, there has been proposed a main column material replacement method for fixing the lower fixture of the main column material replacement device without connecting the concrete foundation. For example, the upper fixture that is fixed to the upper adjacent main column that is connected to the upper side of the replacement main column and the lower adjacent main column that is connected to the lower side of the replacement main column are fixed to the foundation body embedded. Using the main column member replacement device provided with a lower fixing tool and a supporting member installed with a jack interposed between the upper fixing tool and the lower fixing tool. After pushing up and transferring the stress of the replacement main column material to the support member, the replacement of the main column material is performed by removing the replacement main column material, inserting a new main column material, and assembling the new main column material. (For example, refer to Patent Document 2).

  In the main column material replacement method of Patent Document 2, the upper fixture is provided with two tightening members that are wider and wider than the angle steel and are disposed on the inner surface and the outer surface of the angle steel. These two tightening members sandwich both sides of the angle steel, the edges of the tightening member are fixed with bolts and nuts, and both sides of the angle steel are tightened to fix the upper fixture to the main pillar material. At the same time, the upper end surface of the tightening member is locked to the edge of the gusset plate provided on the upper adjacent main column member, and the fixture is prevented from being displaced when the support member is pushed up by the jack. The lower fixture is provided with a band-type tightening member that is divided and disposed on the outer peripheral surface of the quadrangular pyramid portion of the base body. Fit these divided band-type tightening members to the outer peripheral surface of the quadrangular pyramid portion of the foundation body, fix the divided tightening members with bolts and nuts, and tighten the outer peripheral surface of the quadrangular pyramid portion of the base body The lower fixture is fixed to the base body.

JP 2011-149171 A JP-A-10-153015

  However, the main column material replacement method of Patent Document 2 fixes the lower fixing tool to the foundation body when the lower adjacent main column material connected to the lower side of the replacement main column material is embedded in the concrete foundation. For this reason, it is necessary to excavate the soil around the foundation body to expose a part of the foundation body, and there is a problem that work is troublesome and expensive.

  Further, in order to prevent the fixing member from slipping when the support member is pushed up by the jack, the upper fixing member is fastened to the edge of the gusset plate provided on the upper adjacent main column material connected to the upper side of the replacement main column material. The lower fixing tool is divided into bands on the outer peripheral surface of the quadrangular pyramid portion of the foundation body in which the lower adjacent main column material that is connected to the lower side of the replacement main column material is embedded. Since the tightening member of the type is provided, there is no effect of preventing the displacement when the support member is pulled down by the jack, and there is a possibility that the upper and lower fixtures are displaced.

  In addition, since it is necessary to lock the upper fixture to the gusset plate of the upper adjacent main pillar material, it is difficult to fix the upper fixture to the main pillar material when metal fittings or bolts are provided around the gusset plate. There is. In addition, the main pillar material having no gusset plate has a problem that the upper fixing tool cannot be stably fixed because the upper fixing tool cannot be prevented from being displaced.

  Therefore, the object of the present invention is to excavate concrete suspension and soil around the foundation body even when the lower adjacent main column material connected to the lower side of the replacement main column material is embedded in the concrete foundation. It is another object of the present invention to provide a main column material replacement device and a main column material replacement method for a mountain-shaped steel tower that can replace the main column material.

  Also, it can be fixed to the main pillar material provided with gusset plates, metal fittings, bolts, etc., and it can support the stress generated in the fixture without shifting the fixture when the support member is pushed up and down by the jack. An object of the present invention is to provide a main column material replacement device and a main column material replacement method for a Yamagata steel tower.

  In order to solve the above-described problems, the main column material replacement device for an angle steel tower of the present invention is fixed to two adjacent main column materials connected to both ends of the replacement main column material via lap joints. In the main column material replacement apparatus for an angle steel tower comprising two fixtures and a support member installed with a jack interposed between the two fixtures, at least one of the fixtures is the lap joint A plate-shaped connecting bracket disposed so as to be in contact with both flange surfaces of the adjacent main column member, and a fixture that is installed so as to overlap with a part of the lap joint, The nominal length of the bolt is formed by adding the thickness of the connecting metal fitting and the thickness of the adjacent main pillar material, and the lap joint of the adjacent main pillar material from the bolt hole provided in the connecting metal fitting A temporary fixing bolt to be inserted into the bolt hole, and the temporary fixing The bolt head is arranged so as to hold the bolt head of the bolt, and is connected to the coupling metal, and is connected to the bolt holding metal that clamps the bolt head of the temporary fixing bolt; It has the clamping metal fitting to clamp.

  Further, the connection fitting is formed of a plate-like body having a width larger than the flange width of the replacement main pillar member and the adjacent main pillar member, and a part of the connection fitting is part of the lap joint. Bolt holes for inserting the temporary fixing bolts are provided at positions overlapping the bolt holes of the lap joints in the range where they are arranged so as to overlap and in contact with the adjacent main pillar material of the coupling fitting. And a bolt hole for connecting to the clamping metal fitting and a bolt hole for connecting to the clamping metal fitting are within a range protruding in the width direction from the adjacent main pillar material of the coupling metal fitting. It is characterized by being provided.

  In addition, the bolt holding metal fitting is an L-shaped body having a width larger than the flange width of the replacement main column material and the adjacent main column material, and is long enough to cover the overlapping portion of the connection fitting with the lap joint. The bolt holding bracket is formed by simultaneously connecting the plurality of temporary fixing bolts inserted from the bolt holes of the connecting bracket into the bolt holes of the lap joint of the adjacent main column member from the bolt head side. It is characterized by being arranged so as to be pressed, and provided with bolt holes for connection with the connecting metal fittings in the vicinity of both ends in the width direction of the bolt holding metal fittings.

  Further, in the lap joint in which the replacement main column member is connected to the outer surface side of the adjacent main column member, the holding metal fitting has a width larger than the flange width of the replacement main column member and the adjacent main column member Formed in an L-shaped body, a bolt hole for connecting to the connecting metal fitting is provided in the holding metal fitting, and the holding metal fitting is disposed on the outer surface side of the adjacent main column member. The adjacent main pillar material is clamped by being connected to the connection fitting disposed on the inner surface side of the adjacent main pillar material.

  Further, in the lap joint in which the replacement main pillar material is connected to the inner surface side of the adjacent main pillar material, the clamping metal fitting includes a first band metal fitting and a second band metal fitting, The band metal fitting and the second band metal fitting are formed of an L-shaped body having a width larger than the flange width of the replacement main pillar material and the adjacent main pillar material, the first band metal fitting and the second band metal fitting. The band bracket is provided with a bolt hole for connecting the first band bracket and the second band bracket, and the first band bracket is disposed on the outer surface side of the adjacent main column member. It is arranged outside the connecting metal fitting, and is connected to the second band metal fitting arranged on the inner surface side of the adjacent main pillar material via the connection metal fitting, and sandwiches the adjacent main pillar material. It is said.

  Further, the support member is formed of one or a plurality of unit members whose overall length can be adjusted according to the type and the number of the use members, and a screw is interposed between any two of the fixture, the jack, and the support member. It is characterized by comprising a screw adjusting portion whose length can be adjusted according to the screwing position.

  The main column material replacement method for the angle steel tower according to the present invention includes a step of fixing two fixtures to two adjacent main column members connected to both ends of the replacement main column member via lap joints, and 2 A step of installing a support member with a jack interposed between the two fixtures, a step of extending the jack and transferring the load of the replacement main column material to the support member, and the replacement main column material Removing and attaching a new main pillar material, and at least one of the two fixtures is connected to the replacement main pillar material on the outer surface side of the adjacent main pillar material. When the lap joint is installed so as to overlap a part of the lap joint, a part of the tie is overlapped with a part of the lap joint so that the tie is attached to both inner surfaces of the adjacent main column members. A step of placing the flanges in contact with the flange surfaces, and a bolt provided on the connecting bracket. Inserting the temporary fixing bolt into the bolt hole of the lap joint of the adjacent main column member from the hole, and arranging the bolt holding metal fitting so as to press the temporary fixing bolt from the bolt head side; Connecting the bolt pressing metal fitting and the connecting metal fitting so as to hold the bolt head of the temporary fixing bolt, arranging the holding metal fitting on the outer surface side of the adjacent main column member, and the adjacent main body A step of connecting the clamping metal fitting and the coupling metal fitting so as to clamp the column member.

  Further, the main column material replacement method of the angle steel tower of the present invention includes a step of fixing two fixtures to two adjacent main column materials connected to both ends of the replacement main column material via a lap joint, A step of installing a support member with a jack interposed between the two fixtures, a step of extending the jack and transferring the load of the replacement main pillar material to the support member, and the replacement main column Removing a material and attaching a new main pillar material, and at least one of the two fixtures is disposed on the inner surface side of the adjacent main pillar material on the replacement main pillar material. Is installed so as to overlap a part of the lap joint to which the lap joint is connected, so that a part of the connection metal fitting overlaps a part of the lap joint, and the connection metal fitting is arranged on the outer surface side of the adjacent main column member. A step of placing the flanges in contact with both flange surfaces, and Inserting the temporary fixing bolt into the bolt hole of the lap joint of the adjacent main pillar member from the bolt hole, and arranging the bolt holding metal fitting so as to press the temporary fixing bolt from the bolt head side; A step of connecting the bolt pressing metal fitting and the connecting metal fitting so as to hold a bolt head of the temporary fixing bolt, and a step of arranging a first band metal fitting of the holding metal fitting on the outer surface side of the connecting metal fitting. The first band metal fitting and the second band metal fitting of the holding metal fitting arranged on the inner surface side of the adjacent main pillar material are connected via the connecting metal fitting so as to sandwich the adjacent main pillar material. And a process.

  According to the main column material replacement device and main column material replacement method of the Yamagata steel tower of the present invention, the fixture of the main column material replacement device is a lap joint of the replacement main column material and the adjacent main column material. Excavation of concrete and soil around the foundation body, even when the lower adjacent main pillar material connected to the lower side of the replacement main pillar material is buried in the concrete foundation. Since the fixing tool can be fixed to the main pillar material, the labor and cost of the work can be reduced.

  In addition, the fixing tool of the main column material replacement device is fixed by being overlapped with a part of the lap joint of the replacement main column material and the adjacent main column material, and from the bolt hole provided in the connecting bracket of the fixing tool. Since the temporary fixing bolt is inserted into the bolt hole of the lap joint of the adjacent main column member, it is not necessary to prevent the fixing tool from shifting, and the fixing tool does not shift when the support member is pushed up and down by the jack. The generated stress can be supported.

  Furthermore, since the fixture of the main column material replacement device is fixed by overlapping a part of the lap joint of the replacement main column material and the adjacent main column material, metal fittings and bolts are provided around the gusset plate. Even in the case of the main pillar material having no gusset plate, the fixture can be stably fixed.

It is a front view which shows an example of the attachment state of the main pillar material replacement | exchange apparatus of this invention. It is sectional drawing of the lower side fixing tool in the AA line of FIG. It is a front view which shows an example of the arrangement | positioning state of the connection metal fitting of a lower side fixing tool. It is a front view which shows an example of the arrangement | positioning state of the bolt pressing metal fitting of a lower side fixing tool. It is sectional drawing of the lower side fixing tool in the BB line of FIG. It is a top view of the 1st band metal fitting used for the clamping metal fitting of a lower side fixture. It is a front view of the 1st band metal fitting seen from the AA line of FIG. It is a rear view of the 1st band metal fitting seen from the BB line of FIG. It is a top view of the 2nd band metal fitting used for the clamping metal fitting of a lower side fixture. It is a front view of the 2nd band metal fitting used for the clamping metal fitting of a lower side fixture. It is sectional drawing of the upper side fixing tool in the CC line of FIG. It is a front view which shows an example of the arrangement | positioning state of the connection metal fitting of an upper fixture. It is a front view which shows an example of the arrangement | positioning state of the connection metal fitting of the upper fixture seen from the opposite surface side (inner surface side of the main pillar material) of FIG. It is a front view which shows an example of the arrangement | positioning state of the bolt pressing metal fitting of the upper side fixing tool seen from the other surface side (inner surface side of the main pillar material) of FIG. It is sectional drawing of the upper side fixing tool in the DD line | wire of FIG. It is a top view of the clamping metal fitting of an upper fixture. It is a front view of the clamping metal fitting of the upper side fixture seen from the AA line of FIG. It is a rear view of the clamping metal fitting of an upper fixture seen from a BB line of Drawing 16. It is a front view which shows an example of a Yamagata steel tower. It is an enlarged front view which shows an example near the lower end part of the Yamagata steel tower.

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

  FIG. 19 is a front view showing an example of a Yamagata steel tower. FIG. 20 is an enlarged front view showing an example of the vicinity of the lower end of the Yamagata steel tower. The Yamagata steel tower 100 includes a tower main body 101 that is erected along the vertical direction from the ground, and a brace 102 that protrudes laterally from the tower main body 101. The tower main body 101 includes four main pillar members 111, 111,... Arranged along the vertical direction and extending to the upper end of the tower main body 101. Further, the steel tower main body 101 is arranged in a horizontal direction so as to be inclined with the plurality of horizontal members 112, 112,... That connect the main pillar members 111, 111 to each other and the main pillar member 111 or the horizontal member 112. And a plurality of diagonal members 113, 113,... For connecting the main pillar members 111, 111 to each other.

  Each main column member 111 is formed by connecting a plurality of angle steels having joint portions 114 at the ends, and each angle steel arranged at an angle with respect to the ground overlaps the joint portions 114 and 114. It is constructed by joining with bolts and nuts. In addition, the lowermost main column member 111 is embedded in the concrete foundation with the joint portion 114 at one end protruding upward, and is fixed to the foundation body 115.

  Each arm metal 102 includes a pair of arm metal main members 121 and 121 protruding from the steel tower main body 101 along the horizontal direction. In addition, each arm metal 102 includes a pair of arm metal suspension members 122 and 122 that protrude from the tower main body 101 and are arranged so as to be inclined with respect to the arm metal main material 121 and connect the steel tower main body 101 and the tip of the arm metal main material 121. ing.

  When replacing the main column member 111 of such an angle steel tower 100, two fixtures fixed respectively to two adjacent main column members connected to both ends of the replacement main column member via a lap joint, 2. Description of the Related Art Conventionally, a main pillar material replacement device having a support member installed with a jack interposed between these two fixing tools has been used. The fixture of the conventional main column material replacement device has a friction member and a clamp, and the friction member and the adjacent main column material are clamped by placing the friction member in contact with the adjacent main column material. Is pressed and fixed to the adjacent main pillar material. For this reason, it is necessary to fix a fixture at a position avoiding the joint portion 114 of the adjacent main column member and the connecting portion between the diagonal member 113 and the horizontal member 112, and the adjacent main column member is embedded in the foundation 115. In this case, it was necessary to expose a part of the adjacent main pillar material by holding concrete. In addition, as a fixing device of another fixing method, it has a divided band-type tightening member, and this band-type tightening member is fitted to the outer peripheral surface of the quadrangular pyramid portion of the base body 115, and the tightening members are There is a fixing tool for fixing to the base body 115 with bolts and nuts. In the case of this fixture, in order to fix the fixture to the foundation body 115, it was necessary to excavate the soil around the foundation body 115 to expose a part of the foundation body 115.

  The main column material replacement device for the angle steel tower of the present invention is to fix the fixing tool by overlapping a part of the lap joint 114 of the replacement main column material and the adjacent main column material. Even when the adjacent main pillar material connected to the lower side is buried in the foundation 115, it protrudes upward from the foundation body 115 of the adjacent main pillar material without excavating the concrete and the soil around the foundation body 115. A fixture can be secured at the joint 114 position of the portion.

  FIG. 1 is a front view showing an example of an attached state of the main pillar material replacement device of the present invention. The main column material replacement apparatus 1 of the present invention includes an upper fixture 2 fixed to an upper adjacent main column material 8 connected via a lap joint 10 at the upper end of the replacement main column material 7, and a replacement main column material 7. The lower fixing tool 3 fixed to the lower adjacent main pillar member 9 connected via the lap joint 11 at the lower end of the lower fixing tool 3 and the jack 5 is installed between the upper fixing tool 2 and the lower fixing tool 3. The supporting member 4 is provided. The upper fixing tool 2 and the lower fixing tool 3 are fixed so as to overlap a part of the lap joints 10 and 11, and have a connection fitting 12, a temporary fixing bolt 13, a bolt holding fitting 14, and a clamping fitting 15. Yes. In FIG. 1, the upper fixture 2 shows an attachment state to the lap joint 10 in which the replacement main pillar material 7 is connected to the outer surface side of the upper adjacent main pillar material 8, and the lower fixture 3 is The attachment state to the lap joint 11 in which the replacement main pillar material 7 is connected to the inner surface side of the lower adjacent main pillar material 9 is shown. In addition, in the example of the attachment state of the main pillar material replacement | exchange apparatus 1 of this invention of FIG. 1, the case where the fixtures 2 and 3 of the main pillar material replacement | exchange apparatus 1 of this invention are attached to an upper side and a lower side fixture. Although shown, one fixture may be a conventional fixture having a friction member and a clamp.

  First, the lower fixture 3 fixed to the lap joint 11 in which the replacement main column material 7 is connected to the inner surface side of the lower adjacent main column material 9 will be described. 2 is a cross-sectional view of the lower fixture 3 taken along the line AA in FIG. 1, and FIG. 3 is a front view showing an example of an arrangement state of the connection fitting 12a of the lower fixture 3. As shown in FIG. The connection fitting 12a of the lower fixture 3 is formed of a plate-like body having a width larger than the flange width of the replacement main pillar material 7 and the lower adjacent main pillar material 9, and a part of the connection fitting 12a overlaps. It is arranged on both flange surfaces on the outer surface side of the lower adjacent main column member 9 so as to overlap a part of the joint 11. In addition, in the example of the attachment state of the main pillar material replacement apparatus 1 shown in FIG. 1 and the example of the arrangement state of the connecting fitting 12a shown in FIG. 3, a lap joint in which six bolts are used on each flange surface 11 shows a state in which the connection fitting 12a is arranged on the lower adjacent main column member 9 so that a part of the connection fitting 12a overlaps the three bolts of the lap joint 11. The overlapping of the connecting fitting 12a and the lap joint 11 is preferably in the range of about half the number of bolts of the lap joint 11.

  A bolt hole 17a (hereinafter referred to as temporary fixing bolt) for inserting the temporary fixing bolt 13a at a position overlapping with the bolt hole of the lap joint 11 is provided in a range where it contacts the lower adjacent main pillar material 9 of the coupling metal 12a. Called holes). Therefore, the bolt hole of the lap joint 11 of the replacement main pillar material 7 and the lower adjacent main pillar material 9 is in communication with the temporary fixing hole 17a of the connection fitting 12a. Further, in the range protruding in the width direction from the lower adjacent main pillar 9 of the connecting metal 12a, a bolt hole 18a for connecting to the bolt pressing metal 14a and a bolt hole for connecting to the holding metal 15a are provided. 19a.

  The temporary fixing bolt 13a of the lower fixture 3 is formed such that the nominal length of the bolt is a dimension obtained by adding the thickness of the connecting metal 12a and the thickness of the lower adjacent main pillar material 9 together. Are inserted into the bolt holes of the lap joint 11 of the lower adjacent main pillar material 9 from the temporary fixing holes 17a. That is, although the bolt hole of the lap joint 11 of the replacement main column member 7 and the lower adjacent main column member 9 and the temporary fixing hole 17a of the coupling metal 12a are in communication, the temporary fixing bolt 13a is It is inserted into the bolt hole of the lap joint 11 of the replacement main column member 7 and not inserted into the bolt hole of the lap joint 11 of the replacement main column member 7. .

  FIG. 4 is a front view showing an example of an arrangement state of the bolt pressing metal fittings 14 a of the lower fixture 3. The bolt retainer 14a of the lower fixture 3 is an L-shaped body having a width larger than the flange width of the replacement main column member 7 and the lower adjacent main column member 9, and is connected to the lap joint 11 of the connection bracket 12a. It is formed to a length that covers the overlapping portion. Also, bolt holes 20a (hereinafter referred to as bolt pressing holes) for connecting to the coupling metal 12a are provided near both ends in the width direction of the bolt pressing metal 14a.

  As shown in FIG. 2, the bolt retainer 14a includes a plurality of temporary fastening bolts 13a inserted into the bolt holes of the lap joint 11 of the lower adjacent main pillar member 9 from the temporary fastening holes 17a of the connecting fitting 12a. The bolts are arranged so as to be pressed simultaneously from the head side. Then, by inserting the bolt 16 into the bolt holding hole 20a of the bolt holding metal fitting 14a and the bolt hole 18a for connecting to the bolt holding metal fitting 14a of the coupling metal 12a and connecting with the bolt nut 16, the bolt holding down The bolt head of the temporary fixing bolt 13a is clamped between the metal fitting 14a and the connecting metal fitting 12a. In addition, a filler plate 21 having a thickness corresponding to the gap between the connection fitting 12a and the bolt holding fitting 14a is inserted into the bolt joint portion between the connection fitting 12a and the bolt holding fitting 14a.

  The holding fixture 15 a of the lower fixture 3 includes a first band fitting 22 and a second band fitting 23. 5 is a cross-sectional view of the lower fixture 3 taken along the line BB in FIG. 1, FIG. 6 is a top view of the first band fitting 22 of the holding fitting 15a, and FIG. 7 is a first view taken along the line AA in FIG. FIG. 8 is a rear view of the first band fitting 22 as viewed from line BB in FIG. 6, FIG. 9 is a top view of the second band fitting 23 of the holding fitting 15a, and FIG. 10 is a holding fitting 15a. It is a front view of the 2nd band metal fitting 23. The first band fitting 22 and the second band fitting 23 are formed of an L-shaped body having a width larger than the flange width of the replacement main pillar member 7 and the lower adjacent main pillar member 9. Are arranged outside the connecting metal fitting 12 a arranged on the outer surface side of the lower adjacent main pillar material 9, and the second band metal fitting 23 is arranged on the inner surface side of the lower adjacent main pillar material 9. Bolt holes 24 for connecting the first band fitting 22 and the second band fitting 23 to each other in the width direction projecting from the lower adjacent main pillar 9 of the first band fitting 22 and the second band fitting 23. Is provided. Then, the first metal fitting 22 and the second metal fitting 23 are connected to the bolt hole 24 of the first metal band 22 and the holding metal 15a of the metal fitting 12a so as to sandwich the metal fitting 12a and the lower adjacent main pillar material 9. By inserting a bolt 25 into the bolt hole 19a and the bolt hole 24 of the second band metal 23 and connecting with a bolt nut 25, the first band metal 22 and the second band metal 23 The adjacent main pillar material 9 is sandwiched. A filler plate 21 having a thickness corresponding to the gap between the connection fitting 12 a and the second band fitting 23 is inserted into the bolt joint between the first band fitting 22 and the second band fitting 23.

  Bolt holes 27 for connecting to the support frame 26 are provided in the vicinity of the end portion and the center portion of the first band metal fitting 22 in the width direction. In the cross-sectional view of the lower fixture 3 shown in FIG. 5, the support frame 26 is formed in a rectangular shape, and the lower adjacent main pillar material 9 penetrates in the vertical direction through the center of the rectangular shape. 1 band member 22 and bolt nut 28 are connected. Further, the support frame 26 is fixed with jack fixing plates 29 for fixing the jack 5 at both ends in the cross-sectional view of the lower fixture 3 shown in FIG.

  With the above configuration, the lower fixture 3 of the main column material replacement device 1 of the present invention locks the coupling metal 12a to the lower adjacent main column material 9 via the temporary fixing bolt 13a and also connects the coupling metal 12a. Since the lower adjacent main column member 9 is clamped by the holding fitting 15a via the pin and fixed to the lower adjacent main column member 9, the lower fixture 3 is fixed when the support member 4 is pushed up and lowered by the jack 5. The stress generated in the lower fixture 3 can be supported without shifting.

  Next, the upper fixture 2 fixed to the lap joint 10 in which the replacement main pillar material 7 is connected to the outer surface side of the upper adjacent main pillar material 8 will be described. 11 is a cross-sectional view of the upper fixture 2 taken along the line CC in FIG. 1, FIG. 12 is a front view showing an example of the arrangement state of the coupling fitting 12b of the upper fixture 2, and FIG. 13 is the opposite side of FIG. It is a front view which shows an example of the arrangement | positioning state of the connection metal fitting 12b of the upper side fixture 2 seen from (the inner surface side of the main pillar material). The connection fitting 12b of the upper fixture 2 is formed of a plate-like body having a width larger than the flange width of the replacement main pillar material 7 and the upper adjacent main pillar material 8, and a part of the connection fitting 12b is a lap joint 10. Are arranged on both flange surfaces on the inner surface side of the upper adjacent main column member 8 so as to overlap with each other. In addition, in the example of the attachment state of the main pillar material replacement apparatus 1 shown in FIG. 1 and the example of the arrangement state of the connecting fitting 12b shown in FIG. 12, a lap joint in which six bolts are used on each flange surface 10 shows a state in which the connection fitting 12b is arranged on the upper adjacent main column member 8 so that a part of the connection fitting 12b overlaps the three bolts of the lap joint 10. The overlap between the connecting fitting 12b and the lap joint 10 is preferably in the range of about half the number of bolts of the lap joint 10. Moreover, the connection metal fittings 12b respectively arranged on both flange surfaces on the inner surface side of the upper adjacent main columnar member 8 are welded to each other between the two metal plate connection metal pieces 12b at the position of the inner R portion of the angle steel. You can connect.

  Temporary fixing holes 17b for inserting the temporary fixing bolts 13b are provided at positions overlapping the bolt holes of the lap joint 10 in a range in contact with the upper adjacent main pillar member 8 of the coupling metal 12b. . Therefore, the bolt hole of the lap joint 10 of the replacement main pillar material 7 and the upper adjacent main pillar material 8 and the temporary fixing hole 17b of the coupling metal 12b are in communication. Further, in the range protruding in the width direction from the upper adjacent main column member 8 of the coupling metal 12b, a bolt hole 18b for connecting to the bolt pressing metal 14b and a bolt hole 19b for connecting to the clamping metal 15b. And are provided.

  The temporary fixing bolt 13b of the upper fixture 2 is formed such that the nominal length of the bolt is the sum of the thickness of the connecting fitting 12b and the thickness of the upper adjacent main pillar member 8, and the temporary fixing bolt 13b of the connecting fixture 12b is temporarily attached. The stopper hole 17b is inserted into the bolt hole of the lap joint 10 of the upper adjacent main pillar member 8. That is, although the bolt hole of the lap joint 10 of the replacement main pillar material 7 and the upper adjacent main pillar material 8 and the temporary fixing hole 17b of the connecting metal fitting 12b are in communication, the temporary fixing bolt 13b is connected. It is inserted into the bolt holes of the lap joint 10 of the replacement main column member 7 and not inserted into the bolt holes of the lap joint 10 of the upper main column member 8 and the temporary fixing hole 17b of the metal fitting 12b.

  FIG. 14 is a front view showing an example of an arrangement state of the bolt pressing metal members 14b of the upper fixture 2 as viewed from the opposite surface side (inner surface side of the main column member) of FIG. The bolt retainer 14b of the upper fixture 2 is an L-shaped body having a width larger than the flange width of the replacement main column member 7 and the upper adjacent main column member 8, and is an overlapping portion of the connecting bracket 12b with the lap joint 10. It is formed to a length that covers the surface. In addition, bolt holding holes 20b for connecting to the coupling metal 12b are provided near both ends in the width direction of the bolt holding metal 14b.

  As shown in FIG. 11, the bolt holding metal fitting 14b includes a plurality of temporary fixing bolts 13b inserted into the bolt holes of the lap joint 10 of the upper adjacent main column member 8 from the temporary fixing holes 17b of the connecting metal fitting 12b. The bolts are arranged so as to be pressed simultaneously from the head side. Then, a bolt 16 is inserted into the bolt holding hole 20b of the bolt holding metal fitting 14b and the bolt hole 18b for connecting to the bolt holding metal fitting 14b of the connecting metal fitting 12b, and is connected with the bolt nut 16 so that the bolt holding down is achieved. The bolt head of the temporary fixing bolt 13b is clamped by the metal fitting 14b and the connecting metal fitting 12b. In addition, a filler plate 21 having a thickness corresponding to the gap between the connection fitting 12b and the bolt holding fitting 14b is inserted into the bolt joint portion between the connection fitting 12b and the bolt holding fitting 14b.

  15 is a cross-sectional view of the upper fixture 2 taken along the line DD in FIG. 1, FIG. 16 is a top view of the holding fixture 15b of the upper fixture 2, and FIG. 17 is the upper fixture 2 seen from the line AA in FIG. 18 is a front view of the holding fixture 15b, and FIG. 18 is a rear view of the holding fixture 15b of the upper fixture 2 as seen from line BB in FIG. The holding fixture 15b of the upper fixture 2 is formed of an L-shaped body having a width larger than the flange width of the replacement main column member 7 and the upper adjacent main column member 8, and the outer surface of the upper adjacent main column member 8 Arranged on the side. A bolt hole 30 for connecting to the connecting metal fitting 12b is provided in a range protruding in the width direction from the upper adjacent main pillar material 8 of the holding metal fitting 15b. Then, the bolt 25 is inserted into the bolt hole 30 of the clamping metal fitting 15b and the bolt hole 19b for connecting to the clamping metal fitting 15b of the coupling metal fitting 12b arranged on the inner surface side of the upper adjacent main pillar member 8, and the bolt By connecting with the nut 25, the upper adjacent main pillar material 8 is clamped by the clamping metal fitting 15b and the coupling metal fitting 12b. A filler plate 21 having a thickness corresponding to the gap between the sandwiching metal 15b and the coupling metal 12b is inserted into the bolt joint between the clamping metal 15b and the coupling metal 12b.

  Bolt holes 27 for connecting to the support frame 26 are provided in the vicinity of the end in the width direction and the vicinity of the center of the holding metal fitting 15b. In the cross-sectional view of the upper fixture 2 shown in FIG. 15, the support frame 26 is formed in a rectangular shape, and the upper adjacent main pillar member 8 penetrates in the vertical direction through the center of the rectangular shape, so that the holding metal fitting 15b. And bolts and nuts 28. Further, the support frame 26 is fixed with support member fixing plates 31 for fixing the support member 4 at both ends in the cross-sectional view of the upper fixture 2 shown in FIG.

  With the above configuration, the upper fixture 2 of the main column material replacement apparatus 1 according to the present invention locks the connection fitting 12b to the upper adjacent main column member 8 via the temporary fixing bolt 13b and is connected to the holding fitting 15b. Since the upper adjacent main pillar member 8 is sandwiched by the metal fittings 12b and fixed to the upper adjacent main pillar member 8, the upper fixing member 2 is not displaced when the support member 4 is pushed up and lowered by the jack 5 and is fixed on the upper side. The stress generated in the tool 2 can be supported.

  The support member 4 disposed between the upper fixture 2 and the lower fixture 3 is formed of steel pipe pieces 4a, 4b, 4c, and 4d as a plurality of types of unit members having different lengths. After fixing the upper fixture 2 and the lower fixture 3 to the adjacent main pillars 8 and 9, respectively, the steel pipe pieces 4a, 4b, 4c, and the like are selected according to the distance between the upper fixture 2 and the lower fixture 3. By setting the type and number of 4d, the length of the support member 4 can be adjusted with a high degree of freedom.

  A screw adjustment unit 6 is connected to the lower end of the support member 4. The screw adjusting portion 6 is fixed to the screw main body 6a formed of a male screw, the upper flange 6b fixed to the lower end of the support member 4 and screwed to the upper portion of the screw main body 6a, and the upper end of the jack 5, A lower flange 6c that is screwed into a lower portion of the main body 6a and a connecting steel pipe 6d having an upper flange 6b fixed to the lower end are configured. The screw adjusting portion 6 is configured to adjust the overall length in the axial direction by rotating the upper flange 6b or the lower flange 6c with respect to the screw body 6a. After adjusting the overall length of the support member 4 according to the type and number of the steel pipe pieces 4a, 4b, 4c, and 4d, the overall length of the screw adjusting portion 6 is adjusted so that the space between the upper fixture 2 and the lower fixture 3 is increased. The total length of the support member 4, the jack 5, and the screw adjustment unit 6 can be accurately adjusted according to the distance.

  The jack 5 includes a cylinder 5a, a rod 5b, and a rod connecting steel pipe 5c. The cylinder 5a is fixed to the jack fixing plate 29 of the lower fixture 3 and is connected to a hydraulic pump (not shown). The rod connecting steel pipe 5c has a lower end fixed to the tip of a rod 5b driven forward and backward by the cylinder 5a, and a lower flange 6c of the screw adjusting portion 6 fixed to the upper end. The jack 5 expands and contracts the cylinder 5a based on the operation of the hydraulic pump by the operator when the load is transferred between the replacement main column member 7 and the support member 4, and the upper fixture 2 and the lower fixture. The distance between the tool 3 is adjusted.

  Next, a method for replacing the main pillar material of the Yamagata steel tower using the main pillar material replacement device 1 of the present invention having the above-described configuration will be described.

  In the first step, the upper fixture 2 is fixed to the upper adjacent main column member 8 connected via the lap joint 10 at the upper end of the replacement main column member 7, and the lap joint 11 at the lower end of the replacement main column member 7 is fixed. The lower fixing tool 3 is fixed to the lower adjacent main pillar material 9 that is connected through the lower fixing tool 3.

  A method of fixing the fixture to the lap joint in which the replacement main column material is connected to the inner surface side of the adjacent main column material will be described with reference to the lower fixture 3 shown in FIGS. First, the connecting bracket 12a of the lower fixture 3 is arranged on both flange surfaces on the outer surface side of the lower adjacent main column member 9 so that a part of the connecting bracket 12a overlaps a part of the lap joint 11. To do. At this time, it arrange | positions so that the hole 17a for temporary fixing provided in the connection metal fitting 12a may overlap with the bolt hole of the lap joint 11 of the lower adjacent main pillar material 9. FIG. Therefore, in the overlapping part of the connecting fitting 12a and the lap joint 11, the bolt hole of the lap joint 11 of the replacement main pillar material 7 and the lower adjacent main pillar material 9 and the temporary fixing hole 17a of the connecting fitting 12a communicate. It will be in the state. In addition, in the example of the attachment state of the main pillar material replacement apparatus 1 shown in FIG. 1 and the example of the arrangement state of the connecting fitting 12a shown in FIG. 3, a lap joint in which six bolts are used on each flange surface 11 shows a state in which the connection fitting 12a is arranged on the lower adjacent main column member 9 so that a part of the connection fitting 12a overlaps the three bolts of the lap joint 11. The overlapping of the connecting fitting 12a and the lap joint 11 is preferably in the range of about half the number of bolts of the lap joint 11.

  In order to arrange the connecting fitting 12 a so as to overlap a part of the lap joint 11, it is necessary to remove the bolt and nut of the lap joint 11 at the overlapping portion of the connecting fitting 12 a and the lap joint 11. When the bolts and nuts of the lap joint 11 are removed, the bolt strength of the lap joint 11 is lowered, and the stress acting on the lap joint 11 may not be borne. Accordingly, the bolt and nut of the lap joint 11 that does not overlap with the connecting fitting 12a is replaced with a bolt and nut having a higher strength than that of the current material, and only the replaced high-strength bolt and nut is used for the lap joint 11. The stress that acts is borne.

  Next, the temporary fixing bolt 13a of the lower fixture 3 is inserted into the bolt hole of the lap joint 11 of the lower adjacent main column member 9 from the temporary fixing hole 17a of the connecting metal 12a. The temporary fixing bolt 13a is formed such that the nominal length of the bolt is a dimension obtained by adding the thickness of the connecting metal fitting 12a and the thickness of the lower adjacent main pillar material 9 to each other, and therefore the temporary fixing hole 17a of the connecting metal fitting 12a. And inserted into the bolt hole of the lap joint 11 of the lower adjacent main column member 9 and not inserted into the bolt hole of the lap joint 11 of the replacement main column member 7.

  Next, the bolt retainer 14a of the lower fixture 3 is disposed so as to simultaneously press the plurality of temporary fixing bolts 13a from the bolt head side. Then, the bolt 16 is inserted into the bolt holding hole 20a of the bolt holding metal 14a and the bolt hole 18a for connecting to the bolt holding metal 14a of the connecting metal 12a, and connected with the bolt nut 16 to be connected to the bolt holding metal 14a. And the coupling fitting 12a sandwich the bolt head portion of the temporary fixing bolt 13a. A filler plate 21 having a thickness corresponding to the gap between the connection fitting 12a and the bolt holding fitting 14a is inserted into the bolt joint between the connection fitting 12a and the bolt holding fitting 14a.

  Next, the first band metal fitting 22 of the holding metal fitting 15a of the lower fixture 3 is arranged outside the connecting metal fitting 12a arranged on the outer surface side of the lower adjacent main pillar member 9, and the second band metal fitting 23 is arranged below the lower metal fitting 15a. It arrange | positions at the inner surface side of the side adjacent main pillar material 9. FIG. Then, the first metal fitting 22 and the second metal fitting 23 are connected to the bolt hole 24 of the first metal band 22 and the holding metal 15a of the metal fitting 12a so as to sandwich the metal fitting 12a and the lower adjacent main pillar material 9. The bolt 25 is inserted into the bolt hole 19a and the bolt hole 24 of the second band metal 23 and connected with the bolt nut 25. The first band metal 22 and the second band metal 23 are adjacent to each other on the lower side. The pillar material 9 is clamped. A filler plate 21 having a thickness corresponding to the gap between the connection fitting 12 a and the second band fitting 23 is inserted into the bolt joint between the first band fitting 22 and the second band fitting 23.

  Next, in the cross-sectional view of the lower fixture 3 shown in FIG. 5, the support frame 26 formed in a rectangular shape is inserted so that the lower adjacent main pillar material 9 penetrates in the vertical direction in the center of the rectangular shape. The first band member 22 and the bolt nut 28 are connected. Further, a jack fixing plate 29 for fixing the jack 5 is fixed to both ends of the support frame 26.

  By the above method, the lower fixture 3 locks the connecting fitting 12a to the lower adjacent main pillar member 9 via the temporary fixing bolt 13a, and lower holding main 15a with the holding fitting 15a via the connecting fitting 12a. By sandwiching the pillar material 9, it can be fixed to the lap joint in which the replacement main pillar material is connected to the inner surface side of the adjacent main pillar material.

  Next, a method of fixing the fixture to the lap joint in which the replacement main column material is connected to the outer surface side of the adjacent main column material will be described using the upper fixture 2 shown in FIGS. 1 and 11 to 18. First, the connection fitting 12b of the upper fixture 2 is arranged on both flange surfaces on the inner surface side of the upper adjacent main column member 8 so that a part of the connection fitting 12b overlaps a part of the lap joint 10. At this time, it arrange | positions so that the hole 17b for temporary fixing provided in the connection metal fitting 12b may overlap with the bolt hole of the lap joint 10 of the upper adjacent main pillar material 8. FIG. Therefore, in the overlapping portion between the connecting fitting 12b and the lap joint 10, the bolt hole of the lap joint 10 of the replacement main column member 7 and the upper adjacent main column member 8 and the temporary fixing hole 17b of the connecting fitting 12b communicate with each other. It will be in a state. In addition, in the example of the attachment state of the main pillar material replacement apparatus 1 shown in FIG. 1 and the example of the arrangement state of the connecting fitting 12b shown in FIG. 12, a lap joint in which six bolts are used on each flange surface 10 shows a state in which the connection fitting 12b is arranged on the upper adjacent main column member 8 so that a part of the connection fitting 12b overlaps the three bolts of the lap joint 10. The overlapping of the connecting fitting 12b and the lap joint 10 is preferably in the range of about half the number of bolts of the lap joint 10.

  In order to arrange the connecting fitting 12b so as to overlap a part of the lap joint 10, it is necessary to remove the bolt and nut of the lap joint 10 at the overlapping portion of the connecting fitting 12b and the lap joint 10. If the bolts and nuts of the lap joint 10 are removed, the bolt strength of the lap joint 10 may be reduced, and the stress acting on the lap joint 10 may not be borne. Therefore, the bolt and nut of the lap joint 10 that does not overlap with the connecting fitting 12b is replaced with a bolt and nut having a higher strength than the current material, and only the replaced high-strength bolt and nut can be used for the lap joint 10. The stress that acts is borne.

  Next, the temporary fixing bolt 13b of the upper fixture 2 is inserted into the bolt hole of the lap joint 10 of the upper adjacent main pillar member 8 from the temporary fixing hole 17b of the connecting metal 12b. The temporary fixing bolt 13b is formed so that the nominal length of the bolt is a dimension obtained by adding the thickness of the connecting metal fitting 12b and the thickness of the upper adjacent main pillar member 8 to the temporary fixing hole 17b of the connecting metal 12b. It is inserted into the bolt hole of the lap joint 10 of the upper adjacent main column member 8 and is not inserted into the bolt hole of the lap joint 10 of the replacement main column member 7.

  Next, the bolt holding metal fitting 14b of the upper fixture 2 is arranged so that the plurality of temporary fixing bolts 13b are simultaneously pressed from the bolt head side. Then, the bolt 16 is inserted into the bolt holding hole 20b of the bolt holding metal fitting 14b and the bolt hole 18b for connecting to the bolt holding metal fitting 14b of the connecting metal fitting 12b, and connected with the bolt nut 16 to be connected to the bolt holding metal fitting 14b. And the coupling fitting 12b sandwich the bolt head portion of the temporary fixing bolt 13b. In addition, a filler plate 21 having a thickness corresponding to the gap between the connection fitting 12b and the bolt holding fitting 14b is inserted into the bolt joint between the connection fitting 12b and the bolt holding fitting 14b.

  Next, the clamp 15b of the upper fixture 2 is disposed on the outer surface side of the upper adjacent main pillar member 8. Then, the bolt 25 is inserted into the bolt hole 30 of the clamping metal fitting 15b and the bolt hole 19b for connecting to the clamping metal fitting 15b of the connecting metal fitting 12b arranged on the inner surface side of the upper adjacent main pillar member 8, and a bolt nut 25, the upper adjacent main pillar material 8 is clamped by the clamping metal fitting 15b and the coupling metal fitting 12b. Note that a filler plate 21 having a thickness corresponding to the gap between the sandwiching metal 15b and the coupling metal 12b is inserted into the bolt joint between the clamping metal 15b and the coupling metal 12b.

  Next, in the cross-sectional view of the upper fixture 2 shown in FIG. 15, the support frame 26 formed in a rectangular shape is sandwiched so that the upper adjacent main pillar material 8 penetrates in the vertical direction in the center of the rectangular shape. The metal fitting 15b and the bolt nut 28 are connected. Further, a support member fixing plate 31 for fixing the support member 4 is fixed to both ends of the support frame 26.

  By the above method, the upper fixture 2 locks the connection fitting 12b to the upper adjacent main pillar member 8 via the temporary fixing bolt 13b, and the upper adjacent main pillar member 8 is connected to the holding fitting 15b and the connection fitting 12b. By clamping, it can fix to the lap joint by which the replacement main pillar material is connected to the outer surface side of the adjacent main pillar material.

  In the second step, the support member 4 is installed with the jack 5 interposed between the upper fixture 2 and the lower fixture 3.

  When the fixing of the upper fixing tool 2 and the lower fixing tool 3 is completed, the cylinder 5a of the jack 5 is fixed to the jack fixing plate 29 of the lower fixing tool 3, and the hydraulic piping is connected to the cylinder 5a. The jack 5 is installed in 3 to be operable.

  Thereafter, the distance between the upper fixture 2 and the lower fixture 3 is measured, the length of the support member 4 adapted to the measured value is set, and the steel pipe pieces 4a, 4b, 4c adapted to this set length. , 4d are determined. The support member 4 is produced by connecting the determined types and number of steel pipe pieces 4 a, 4 b, 4 c, 4 d to each other, and the upper ends 4 a, 4 a of the support member 4 are attached to the support member fixing plate 31 of the upper fixture 2. Link. Thereafter, the screw main body 6a of the screw adjusting portion 6 is rotated with respect to the lower flange 6c, and the upper flange 6b and the connecting steel pipe 6d are rotated with respect to the screw main body 6a. Adjust the height. When the flange of the upper end of the connecting steel pipe 6d comes into contact with the flange of the lower end of the steel pipe piece 4d provided at the lower end of the support member 4 by adjusting the length of the screw adjusting portion 6, the connecting steel pipe 6d and the steel pipe piece 4d are connected with a bolt nut. Fix it. Thus, between the left and right ends of the upper fixture 2 and the lower fixture 3 fixed to the adjacent main column members 8 and 9, two sets of support members 4, jacks 5 and screw adjusting portions 6 are arranged to their full length. Adjust and install.

  In the third step, the jack 5 is extended to transfer the load of the replacement main pillar material 7 to the support member 4.

  The diagonal member and the horizontal member connected to the replacement main pillar member 7 are separated from the replacement main pillar member 7 by removing the bolts and nuts fastened to the connecting positions. Subsequently, the bolts and nuts that join the replacement main column material 7 and the lower adjacent main column material 9 and the bolts and nuts that connect the replacement main column material 7 and the upper adjacent main column material 8 are loosened, and the hydraulic pump is operated. The cylinder is driven to extend, and the load acting on the replacement main column member 7 is transferred to the support member 4.

  In the fourth step, the replacement main pillar material 7 is removed and a new main pillar material is attached.

  When the load acting on the replacement main column material 7 is transferred to the support member 4, the replacement main column material 7 is removed, and the new main column material is replaced with the upper end of the lower adjacent main column material 9 and the upper adjacent main column. It is assembled between the lower end of the material 8. After assembling the new main pillar material, the jack 5 is driven to contract, the load of the support member 4 is transferred to the main pillar material, and the screw adjusting portion 6, the support member 4 and the jack 5 are removed. Finally, the lower fixture 3 is removed from the lower adjacent main pillar material 9 and the upper fixture 2 is removed from the upper adjacent main pillar material 8 to complete the replacement work.

  According to the above-mentioned main column material replacement method of the Yamagata steel tower, the fixing device of the main column material replacement device is fixed by overlapping with a part of the lap joint of the replacement main column material and the adjacent main column material. Even when the lower adjacent main pillar material connected to the lower side of the replacement main pillar material is buried in the concrete foundation, the lower adjacent main pillar is not excavated in the concrete and without excavating the soil around the foundation body. The fixture can be fixed at the joint position of the portion protruding upward from the base body of the material.

  In addition, the fixture of the main pillar material replacement device, by locking the connecting metal fitting to the adjacent main pillar material via the temporary fixing bolt, and sandwiching the adjacent main pillar material with the holding metal fitting via the connecting metal fitting, Since it can be fixed to the lap joint, it is not necessary to prevent the fixing tool from being displaced, and the stress generated in the fixing tool can be supported without the fixing tool being displaced when the support member is pushed up and lowered by the jack. In addition, the fixing tool can be stably fixed even when a metal fitting or a bolt is provided around the gusset plate or in a main pillar material having no gusset plate.

DESCRIPTION OF SYMBOLS 1 Main pillar material replacement apparatus 2 Upper side fixing tool 3 Lower side fixing tool 4 Support member 5 Jack 5a Cylinder 5b Rod 5c Rod connection steel pipe 6 Screw adjustment part 6a Screw body 6b Upper flange 6c Lower flange 6d Connection steel pipe 7 Replacement main Column material 8 Upper adjacent main column material 9 Lower adjacent main column material 10 Lap joint at the upper end of the replacement main column material 11 Lap joint at the lower end of the replacement main column material 12 Connecting bracket 13 Temporary fastening bolt 14 Bolt holding bracket 15 Metal fittings 16 Bolt nuts 17 Temporary fixing holes 18 Bolt holes for connecting to bolt holding metal fittings 19 Bolt holes for connecting to holding metal fittings 20 Bolt holding holes 21 Filler plates 22 First band metal fittings 23 Second band metal fittings 24 Second Bolt holes for connecting the 1 band bracket and the second band bracket to each other 25 Bolt nut 26 Support frame 27 Support frame Bolt hole for connecting to rim 28 Bolt nut 29 Jack fixing plate 30 Bolt hole for connecting to connecting bracket 31 Support member fixing plate 100 Yamagata steel tower 101 Steel tower body 102 Arm metal 111 Main pillar material 112 Horizontal material 113 Diagonal material 114 Joint 115 Base body 121 Arm metal main material 122 Arm metal suspension material

Claims (8)

Two fixing members fixed to two adjacent main column members connected to both ends of the replacement main column member via lap joints, and a support member installed with a jack interposed between the two fixing members In the main column material replacement device of the Yamagata steel tower with
At least one of the fixtures is installed so as to overlap a part of the lap joint,
The fixture installed to overlap a part of the lap joint is
A plate-like coupling fitting disposed so as to be in contact with both flange surfaces of the adjacent main column member;
The nominal length of the bolt is formed by adding the thickness of the connecting metal fitting and the thickness of the adjacent main pillar material, and the lap joint of the adjacent main pillar material from the bolt hole provided in the connecting metal fitting. A temporary fixing bolt inserted into the bolt hole;
A bolt holding metal fitting arranged to hold the bolt head of the temporary fixing bolt, connected to the coupling metal fitting, and holding the bolt head of the temporary fixing bolt;
A clamping fitting connected to the coupling fitting and sandwiching the adjacent main pillar material;
A main column material replacement device for a Yamagata steel tower characterized by comprising: In the main column material replacement apparatus of the Yamagata steel tower according to claim 1,
The connection fitting is formed of a plate-like body having a width larger than the flange width of the replacement main pillar material and the adjacent main pillar material, and a part of the connection fitting overlaps a part of the lap joint. Being placed in the
A bolt hole for inserting the temporary fixing bolt is provided at a position overlapping the bolt hole of the lap joint in a range where the connecting metal fitting is in contact with the adjacent main pillar material;
Bolt holes for connecting to the bolt pressing metal fittings and bolt holes for connecting to the clamping metal fittings are provided in a range protruding in the width direction from the adjacent main pillar material of the connecting metal fittings. ,
The main pillar material replacement device for the Yamagata Steel Tower. In the main column material replacement apparatus of the Yamagata steel tower according to claim 1,
The bolt holding metal fitting is an L-shaped body having a width larger than the flange width of the replacement main column material and the adjacent main column material, and is formed to a length that covers the overlapping portion of the connecting metal fitting with the lap joint. is being done,
The bolt holding metal fittings are arranged so as to simultaneously hold the plurality of temporary fixing bolts inserted from the bolt holes of the connecting metal fittings into the bolt holes of the lap joints of the adjacent main pillar members from the bolt head side. Being
In the vicinity of both ends in the width direction of the bolt holding metal fittings, bolt holes for connecting to the connecting metal fittings are provided,
The main pillar material replacement device for the Yamagata Steel Tower. In the main column material replacement apparatus of the angle steel tower according to claim 1, in the lap joint in which the replacement main column material is connected to the outer surface side of the adjacent main column material,
The holding metal fitting is formed of an L-shaped body having a width larger than a flange width of the replacement main pillar material and the adjacent main pillar material,
The clamping metal fitting is provided with a bolt hole for connecting to the coupling metal fitting,
The clamping metal fitting is arranged on the outer surface side of the adjacent main pillar material and connected to the connecting metal fitting arranged on the inner surface side of the adjacent main pillar material to sandwich the adjacent main pillar material;
The main pillar material replacement device for the Yamagata Steel Tower. In the main column material replacement apparatus of the angle steel tower according to claim 1, in the lap joint in which the replacement main column material is connected to the inner surface side of the adjacent main column material,
The holding metal fitting has a first band metal fitting and a second band metal fitting, and the first band metal fitting and the second band metal fitting are formed from a flange width of the replacement main column material and the adjacent main column material. Is formed of an L-shaped body with a large width,
The first band metal fitting and the second band metal fitting are provided with bolt holes for connecting the first band metal fitting and the second band metal fitting,
The first band metal fitting is arranged on the outer side of the coupling metal member arranged on the outer surface side of the adjacent main column member, and is arranged on the inner surface side of the adjacent main column member via the connection metal member. Connecting with the second band metal fitting to sandwich the adjacent main pillar material;
The main pillar material replacement device for the Yamagata Steel Tower. In the main column material replacement apparatus of the Yamagata steel tower according to claim 1,
The support member is formed of one or a plurality of unit members whose overall length can be adjusted according to the type and number of used members,
A screw adjuster having a length that can be adjusted according to the screwing position of the screw between any two of the fixture, the jack, and the support member;
The main pillar material replacement device for the Yamagata Steel Tower. Fixing each of two fixtures to two adjacent main column members connected to each other of the replacement main column member via lap joints;
A step of installing a support member with a jack interposed between the two fixtures;
Extending the jack and transferring the load of the replacement main pillar material to a support member;
Removing the replacement main pillar material and attaching a new main pillar material;
With
When at least one of the two fixtures is installed over a part of a lap joint in which the replacement main pillar is connected to the outer surface side of the adjacent main pillar,
A step of disposing the connecting fitting so as to overlap a part of the lap joint so that the connecting fitting is in contact with both flange surfaces on the inner surface side of the adjacent main column member;
Inserting the temporary fixing bolt from the bolt hole provided in the connection fitting into the bolt hole of the lap joint of the adjacent main column member;
A step of placing the bolt holding metal fitting so as to hold the temporary fixing bolt from the bolt head side;
Connecting the bolt pressing metal fitting and the coupling metal fitting so as to sandwich the bolt head of the temporary fixing bolt;
A step of disposing the holding metal fitting on the outer surface side of the adjacent main pillar material;
Connecting the clamping metal fitting and the coupling metal fitting so as to sandwich the adjacent main pillar material;
A method for replacing a main pillar material of a Yamagata steel tower, comprising: Fixing each of two fixtures to two adjacent main column members connected to each other of the replacement main column member via lap joints;
A step of installing a support member with a jack interposed between the two fixtures;
Extending the jack and transferring the load of the replacement main pillar material to a support member;
Removing the replacement main pillar material and attaching a new main pillar material;
With
When at least one of the two fixtures is installed on a part of a lap joint where the replacement main column member is connected to the inner surface side of the adjacent main column member,
A step of placing a part of the coupling fitting over a part of the lap joint, and placing the coupling fitting in contact with both flange surfaces on the outer surface side of the adjacent main column member;
Inserting the temporary fixing bolt from the bolt hole provided in the connection fitting into the bolt hole of the lap joint of the adjacent main column member;
A step of placing the bolt holding metal fitting so as to hold the temporary fixing bolt from the bolt head side;
Connecting the bolt pressing metal fitting and the coupling metal fitting so as to sandwich the bolt head of the temporary fixing bolt;
Disposing the first band metal fitting of the clamping metal fitting on the outer surface side of the connection metal fitting,
The step of connecting the first band metal fitting and the second band metal fitting of the holding metal fitting arranged on the inner surface side of the adjacent main pillar material via the connecting metal fitting so as to sandwich the adjacent main pillar material. When,
A method for replacing a main pillar material of a Yamagata steel tower, comprising:

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