JP6585142B2 - Tower structure structure, composite reinforcing material, and method of manufacturing composite reinforcing material - Google Patents

Description

  The present invention relates to a structure of a tower structure in which a composite reinforcing material is embedded along the tower of the tower structure, a composite reinforcing material, and a method for manufacturing the composite reinforcing material.

  In Patent Document 1, as a structure of a tower structure such as a pier of a bridge, a composite reinforcing material in which a vertical steel material such as an H-shaped steel is surrounded by a reinforcing bar assembly is installed at a predetermined interval inside a housing. It is disclosed.

Japanese Patent No. 3463074

  Here, the composite reinforcing material disclosed in Patent Document 1 is arranged so that the spiral reinforcing bar constituting the reinforcing bar assembly does not contact the vertical steel material around the entire circumference of the vertical steel material. For this reason, the thickness of the composite reinforcing material is a thickness obtained by adding a separation between the vertical steel material and the helical reinforcing bar. And the thickness of a composite reinforcement material will be reflected in the wall thickness of a housing as it is.

  Accordingly, an object of the present invention is to provide a structure of a tower structure, a composite reinforcing material, and a manufacturing method of the composite reinforcing material that can reduce the wall thickness of the frame.

  In order to achieve the above object, the structure of the tower structure of the present invention is a structure of a tower structure in which a composite reinforcing material is embedded along the tower structure, and the composite reinforcing material has a plate shape. A vertical steel material formed by opposing flanges, and a reinforcing bar assembly that is in contact with a side edge of the flange and is separated from the plate surface, and surrounds the vertical steel material. By installing at a predetermined interval inside the housing, the portion where the composite reinforcing material is embedded and the portion where the main reinforcing bar is not embedded as well as the composite reinforcing material are alternately formed, and the tower It is characterized in that a band reinforcement is embedded in the surface layer of the structure.

  The invention of the composite reinforcing material is a composite reinforcing material embedded in a concrete structure, wherein the vertical steel material formed by opposing plate-shaped flanges is brought into contact with the side edges of the flanges and from the plate surface. Comprises a reinforcing bar assembly surrounding the vertical steel material in a separated state.

  Here, the vertical steel material is preferably an H-shaped steel or an I-shaped steel. The reinforcing bar assembly includes a spiral reinforcing bar extending in the axial direction of the vertical steel material, and an axial reinforcing bar extending substantially parallel to the axial direction and disposed between the flange and the helical reinforcing bar. It can be set as the structure provided with.

  Furthermore, the invention of a method for manufacturing a composite reinforcing material is the method for manufacturing a composite reinforcing material according to any one of the above, wherein the vertical steel material is spaced apart in the axial direction so that the axial direction is a lateral direction. And a step of assembling the reinforcing bar assembly in contact with a side edge of the flange so as to surround the vertical steel material.

  In addition, the vertical steel material is arranged so that the axial direction is a lateral direction, and the step is bridged between support bases arranged at intervals in the axial direction, and the axial rebar is along the outside of the flange. And a step of assembling the helical rebar while being in contact with a side edge of the flange so as to surround the vertical steel material and the axial rebar.

  Here, with respect to the plate surface outside the flange on both sides of the vertical steel material, a spacer may be attached at an interval in the axial direction so as to be interposed between the spiral reinforcing bars.

  In the structure of the tower structure of the present invention configured as described above, when a vertical steel material formed by opposing plate-like flanges is surrounded by the reinforcing bar assembly, the reinforcing bar assembly is brought into contact with the side edge of the flange.

  For this reason, there is no separation between the side edge of the flange and the reinforcing bar assembly, and the wall thickness of the housing can be reduced. If the wall thickness of the frame is reduced, the weight of the frame can be reduced, so that the overall construction cost and the construction period including the foundation supporting the tower structure can be reduced.

  In addition, a composite reinforcing material in which a reinforcing bar assembly is brought into contact with the side edge of the flange to surround the vertical steel material will support the reinforcing bar assembly by the vertical steel material. It is possible to make it difficult for collapse and displacement of the rebar assembly.

  Furthermore, if it is a method of manufacturing a composite reinforcing material that assembles a reinforcing bar assembly in contact with the side edge of a flange so as to surround a vertical steel material, the assembly work can be easily performed without using a special jig. Can do.

It is sectional drawing which showed the structure of the pier used as the tower structure of embodiment of this invention. It is a figure explaining that the wall thickness of a housing becomes thin by using the spiral column used as the composite reinforcement material of embodiment of this invention. It is a side view for demonstrating one process of the manufacturing method of a spiral column. It is a side view for demonstrating one process of the manufacturing method of a spiral column. It is a side view for demonstrating one process of the manufacturing method of a spiral column. It is sectional drawing for demonstrating one process of the manufacturing method of a spiral column. It is sectional drawing for demonstrating one process of the manufacturing method of a spiral column. It is sectional drawing for demonstrating one process of the manufacturing method of a spiral column. It is the perspective view which showed the structure of the spiral column which the assembly | attachment of the reinforcing bar assembly was completed.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is a cross-sectional view showing the structure of a pier 1 that is a tower structure according to the present embodiment. Here, the tower structure corresponds to a concrete structure such as a pier, an abutment, a chimney, and a pillar extending in the vertical direction. Hereinafter, the pier 1 will be described as an example.

  As shown in FIG. 1, the pier 1 of the present embodiment is formed in a hollow shape having a rectangular shape in plan view. That is, the frame 11 of the pier 1 is formed in a shape surrounding the hollow, such as a letter-shaped cross section.

  And the composite reinforcement material is installed in the inside of this housing 11 at predetermined intervals. That is, the site | part in which the composite reinforcement material is embed | buried and the site | part only of the concrete which is not limited to the composite reinforcement material and the main reinforcement are also laid alternately.

  Here, the composite reinforcing material arranged in a range that becomes the side of the rectangle in cross section is referred to as a spiral column 2. The spiral column 2 is mainly composed of an H-section steel 3 that is a vertical steel material and a reinforcing bar assembly 4 that surrounds the H-section steel 3.

  In addition, an H-section steel 3A and a corner portion assembly 5 are disposed in the corner portion of the rectangular housing 11 having a rectangular cross section. And on the outer peripheral side of the housing 11, outer band reinforcing bars 12 are arranged as band reinforcing bars. In addition, an inner band reinforcing bar 13 is disposed as a band reinforcing bar on a surface layer on the inner peripheral side of the housing 11.

  Such a pier 1 can be constructed, for example, by the following process. First, the precast concrete plate in which the outer band reinforcing bar 12 is embedded and the precast concrete plate in which the inner band reinforcing bar 13 is embedded are arranged at positions that become the outer peripheral surface of the pier 1 and the inner peripheral surface on the hollow side.

  And in the space between the precast concrete plates facing each other, spiral columns 2,... Are installed with a predetermined interval in the longitudinal direction in plan view. In addition, the H-section steel 3A and the corner portion assembly 5 are arranged in the corner portion.

  Furthermore, according to the height of the pier 1 to be constructed, a precast concrete plate, a spiral column 2 and an H-shaped steel 3A are connected in the vertical direction. The space between the precast concrete slabs where the installation of the spiral column 2 and the like has been completed is appropriately filled with concrete to construct the pier 1 having a predetermined height.

  In addition, the pier 1 can also be constructed using a conventional formwork without using a precast concrete plate.

  Next, details of the spiral column 2 serving as the composite reinforcing material of the present embodiment will be described with reference to FIGS.

  The spiral column 2 is mainly composed of an H-section steel 3 that is a vertical steel material and a reinforcing bar assembly 4 that surrounds the H-section steel 3. Here, although the H-section steel 3 is demonstrated to an example as a vertical steel material, it is not limited to this, I-section steel etc. may be sufficient.

  As shown in FIG. 2, the H-shaped steel 3 is formed by a pair of plate-like flanges 31, 31 formed to face each other and a plate-like web 32 that connects the flanges 31, 31 at the center. ing.

  The plate-like flange 31 extends in a strip shape in the axial direction of the H-section steel 3 (the direction orthogonal to the plane of FIG. 2), and the side surface facing the outside is called a plate surface 312, and the width direction of the strip-like plate surface 312 End faces located on both sides in the vertical direction in FIG. 2 are referred to as side edges 311 and 311. That is, the side edge 311 has a very narrow area compared to the plate surface 312.

  The reinforcing bar assembly 4 is placed in contact with the side edges 311 and 311 of the flange 31 and is separated from the plate surface 312. The reinforcing bar assembly 4 includes a spiral bar 41 (see FIG. 5) as a continuous spiral reinforcing bar that extends in the axial direction of the H-section steel 3, and an axis that extends substantially parallel to the axial direction of the H-section steel 3. It is mainly comprised by the vertical reinforcement 42, ... as a directional reinforcement.

  The spiral reinforcement 41 is a reinforcing bar wound in a spiral spring shape, and as shown in FIGS. 3B to 3C, the bundled spiral reinforcement 41A can be extended to have an arbitrary length.

  On the other hand, the vertical reinforcing bars 42 are disposed in the gap between the plate surface 312 of the flange 31 and the spiral reinforcing bars 41. Here, the reinforcing bar assembly 4 in which the vertical reinforcing bars 42,... Are respectively disposed at the four corners of the spiral reinforcing bar 41 that is substantially rectangular in cross section will be described as an example.

  A conventional reinforcing bar assembly a is shown on the left side of the arrow in FIG. The reinforcing bar assembly a is composed of an H-shaped steel a3, a spiral bar a1 that surrounds the H-shaped steel a3, and vertical bars a2,... Arranged at each corner of the spiral bar a1.

  And the spiral reinforcement a1 is arrange | positioned so that it may not contact | connect not only the plate | board surface of the flange a31 of H-section steel a3 but the side edge a311. In short, a separation exists between the side edge a311 of the flange a31 and the spiral muscle a1.

  For this reason, the thickness of the conventional reinforcing bar assembly a (the length in the direction perpendicular to the web plate surface of the H-shaped steel a3) is greater than the thickness of the reinforcing bar assembly 4 of the present embodiment, and the thickness is This is reflected in the thickness of the composite reinforcement and the wall thickness of the housing. That is, the spiral column 2 of the present embodiment is thinner than the conventional one by bringing the spiral bars 41 into contact with the side edges 311 and 311 of the flange 31 of the H-shaped steel 3, so that the wall thickness of the housing 11 is also reduced. be able to.

  Next, a method for manufacturing the spiral column 2 will be described with reference to FIGS. 3A to 3C and FIGS. 4A to 4C.

  First, as shown in FIG. 3A, the H-section steel 3 in which the separation direction of the support platforms 6 and 6 is matched to the axial direction is bridged over a plurality of support platforms 6 and 6 arranged at intervals. FIG. 3A shows a state where the plate surface 312 of one flange 31 of the H-section steel 3 is visible. That is, the side edges 311 and 311 of the flange 31 are an upper edge and a lower edge in this arrangement. Further, at the left and right ends of the flange 31 of the H-shaped steel 3, joint holes 33,... For connecting to another H-shaped steel 3 adjacent in the vertical direction when the pier 1 is constructed are drilled.

  In this way, the plate surface 312 of the flange 31 of the H-section steel 3 spanned between the support bases 6 and 6 so that the axial direction is the horizontal direction is provided with a plurality of brackets spaced in the axial direction. Install 7,.

  As shown in FIG. 4A, the metal fitting 7 is formed in a U shape in a sectional view and includes a magnet 71 on the back surface side. For this reason, it can be made to attach or detach easily in the arbitrary places of the flange 31 formed with steel materials.

  The bracket 7 formed in a U-shape in cross-section can use the upper receiving portion 7 a that is the upper flange and the lower receiving portion 7 b that is the lower flange as a temporary placing table for the vertical reinforcing bars 42. Therefore, two vertical reinforcing bars 42, 42 are arranged on the outer sides of the flanges 31, 31 on both sides of the H-shaped steel 3, respectively, using the support fitting 7.

  Subsequently, as shown in FIG. 3B, the bundled spiral bars 41 </ b> A and 41 </ b> A are attached to the H-section steel 3 in a necessary number according to the length of the H-section steel 3. The spiral bars 41A and 41A mounted in a bundled state are extended in the axial direction so that the entire length of the H-section steel 3 is surrounded by the spiral bars 41 as shown in FIGS. 3C and 5.

  Here, in order to maintain the state in which the spiral muscle 41 is extended, the movement of the spiral muscle 41 in the axial direction is limited by the clip 72 as shown in FIG. 4B. That is, as shown in FIG. 5, a part of the spiral muscle 41 is sandwiched between a pair of clips 72, 72, and the clips 72, 72 are fixed to the flange 31, thereby moving the portion sandwiched between the clips 72, 72. Can be prevented.

  Then, for example, a rectangular plate spacer 8 is interposed between the metal fitting 7 and the spiral line 41. The spacer 8 can be fixed to the upper receiving portion 7a of the receiving bracket 7 using a vise or a bolt.

  By attaching the spacers 8 and 8 having the same width to the flanges 31 and 31 on both sides of the H-shaped steel 3, the H-shaped steel 3 can be disposed at the center of the spiral bar 41. That is, the relative position adjustment of the spiral bar 41 with respect to the H-shaped steel 3 can be performed by interposing the spacers 8 and 8. FIG. 3C is a side view showing a state in which the spacer 8 is interposed between the metal fitting 7 and the spiral bar 41.

  After the position adjustment of the spiral bar 41 by the spacer 8, as shown in FIG. 4C, the vertical reinforcing bar 42 placed on the upper receiving part 7a of the bracket 7 is moved to the upper corner of the spiral bar 41, The vertical reinforcing bar 42 placed on the lower receiving part 7 b is moved to the lower corner of the spiral reinforcing bar 41.

  The vertical reinforcing bars 42 moved to the corners of the spiral bars 41 are fixed to the spiral bars 41 by binding wires 73 as shown in FIG. In this way, the reinforcing bar assembly 4 is assembled to the H-shaped steel 3 to complete the spiral column 2. In addition, after extending the spiral reinforcement 41, the number of the support bases 6 which support the H-section steel 3 can be increased.

  Next, the structure of the pier 1 of this embodiment, the action of the spiral column 2 and its manufacturing method will be described.

  In the structure of the pier 1 of the present embodiment configured as described above, when the H-shaped steel 3 formed by opposing the plate-like flanges 31, 31 is surrounded by the reinforcing bar assembly 4, The reinforcing bar assembly 4 is brought into contact with 311 and 311.

  For this reason, there is no separation between the side edge 311 of the flange 31 and the reinforcing bar assembly 4, and the wall thickness of the housing 11 can be reduced. Here, since the area of the side edge 311 of the flange 31 is very narrow, even if the concrete is not filled between the side edge 311 and the spiral reinforcement 41, the structural performance is not affected. In addition, a sufficient space is secured between the plate surface 312 of the flange 31 having a large area and the spiral reinforcement 41 so that the concrete can go around.

  And since the cross-section can be reduced if the thickness (wall thickness) of the casing 11 is reduced, the amount of concrete used for filling can be reduced and the weight of the casing 11 can be reduced. Further, if the weight of the housing 11 can be reduced, the foundation for supporting it can be slimmed down, so that the overall construction cost and construction period can be reduced.

  On the other hand, when the wall thickness of the casing 11 is not changed, a vertical steel material having a size (cross section) larger than that of the conventional case can be arranged, so that structural performance superior to that of the conventional case can be obtained.

  Further, in the case of the spiral column 2 in which the reinforcing bar assembly 4 is brought into contact with the side edges 311 and 311 of the flange 31 to surround the H-shaped steel 3, the reinforcing bar assembly 4 is supported by the H-shaped steel 3. For this reason, it is possible to make it difficult for the cargo collapse or the rebar assembly 4 to shift during transportation or erection. That is, even if a force is temporarily applied to the reinforcing bar assembly 4 until the spiral column 2 is manufactured and built, it is moved or displaced due to contact with the flanges 31 of the H-section steel 3. Is limited, and a completed shape can be maintained at the time of manufacture.

  If H-shaped steel 3 or I-shaped steel is used as the vertical steel material, the steel plate has a pair of flanges 31 and 31 having side edges 311 having a narrow area with respect to the plate surface 312. You do not have to prepare.

  In addition, a special jig is used in the manufacturing method of the spiral column 2 in which the reinforcing bar assembly 4 is assembled while being in contact with the side edges 311 of the flanges 31, 31 so as to surround the H-shaped steel 3. The assembly work can be easily carried out even without it.

  That is, as in the case of the conventional rebar assembly a shown on the left side of FIG. 2, a special arm-shaped jig projecting from the flange a31 is used in order to ensure separation around the entire circumference of the H-shaped steel a3. However, if the spiral line 41 can be brought into contact with the side edge 311 of the flange 31, the spiral line 41 can be supported by the flange 31, so that the use of a special jig is omitted. be able to.

  In addition, the spiral muscle 41 may be simply attached to the flange 31 with the clip 72 or the like by placing it on the flanges 31 and 31 of the H-section steel 3 in a bundled state, extending the side edges 311 and 311 to slide. Thus, manufacturing can be performed efficiently.

  Further, if the bracket 7 and the spacer 8 are attached at an interval in the axial direction and are interposed between the spiral bar 41 and the flange 31, the position can be easily adjusted, and the steel bar 3 is reinforced with respect to the H-section steel 3. It is possible to prevent the assembly 4 from being biased.

  The embodiment of the present invention has been described in detail above with reference to the drawings. However, the specific configuration is not limited to this embodiment, and design changes that do not depart from the gist of the present invention are not limited to this embodiment. Included in the invention.

  For example, in the above-described embodiment, the process of attaching the spiral bars 41 after arranging the vertical reinforcing bars 42 outside the flanges 31 of the H-shaped steel 3 has been described. After the steel 3 is surrounded by the spiral bars 41, the vertical reinforcing bars 42 may be inserted into the gaps between the spiral bars 41 and the flange 31.

1 Pier (tower structure)
11 Housing 12 Outer rebar (band rebar)
13 Inner belt reinforcement (band reinforcement)
2 Spiral column (composite reinforcement)
3 H section steel (vertical steel)
31 Flange 311 Side edge 312 Plate surface 4 Reinforcing bar assembly 41 Spiral bar (spiral bar)
42 Vertical bars (Axial bars)
6 Support stand 8 Spacer

Claims (5)

A structure of a tower structure in which a composite reinforcing material is embedded along the tower structure's frame,
The composite reinforcing material includes: a vertical steel material formed by opposing plate-like flanges; and a reinforcing bar assembly that surrounds the vertical steel material in contact with a side edge of the flange and separated from the plate surface. Prepared,
The reinforcing bar assembly is arranged between the flange and the helical reinforcing bar extending substantially parallel to the axial direction and extending substantially parallel to the axial direction. With axial rebar,
By installing the composite reinforcing material at a predetermined interval inside the housing, the portion where the composite reinforcing material is embedded and the portion where the main reinforcing bar is not embedded, not limited to the composite reinforcing material, are alternated. The structure of the tower structure is characterized in that a band reinforcing bar is embedded in the casing surface layer of the tower structure. A composite reinforcement embedded in a concrete structure,
A vertical steel material formed by opposing plate-shaped flanges;
A reinforcing bar assembly that surrounds the vertical steel material in contact with the side edge of the flange and is separated from the plate surface ;
The reinforcing bar assembly is arranged between the flange and the helical reinforcing bar extending substantially parallel to the axial direction and extending substantially parallel to the axial direction. A composite reinforcing material comprising an axial rebar .   The composite reinforcing material according to claim 2, wherein the vertical steel material is H-shaped steel or I-shaped steel. It is a manufacturing method of the composite reinforcement material according to claim 2 or 3 ,
Spanning the vertical steel material between the support pedestals arranged with an interval in the axial direction so that the axial direction is a lateral direction;
Placing the axial rebar along the outside of the flange;
And a step of assembling the helical rebar having a substantially rectangular shape in plan view while contacting the side edge of the flange so as to surround the vertical steel material and the axial rebar. A helical bracket provided with a magnet on the back side is attached to the outer plate surface of the flange on both sides of the vertical steel material, and a spacer is attached at an interval in the axial direction via the metallic bracket. The method for producing a composite reinforcing material according to claim 4 , wherein the composite reinforcing material is interposed therebetween.