JP4365820B2 - Pier reinforcement unit and bridge reinforcement structure - Google Patents

Description

  The present invention relates to a pier reinforcement unit and a pier reinforcement structure for reinforcing an existing pier.

As a method for reinforcing existing piers for the purpose of earthquake resistance or the like, there is a method of covering the piers with members made of reinforced concrete. For example, Patent Document 1 describes a precast concrete panel having a reinforcing bar inside. This concrete panel can surround a concrete pillar by combining the divided concrete panels in the horizontal direction. After the concrete columns are combined to surround the concrete pillars, the concrete pillars are reinforced by filling a grout between the concrete pillars and the concrete panels.
JP-A-10-96260

  However, the above technique has a drawback that the concrete panel is heavy because the reinforcing bars are built in the precast concrete panel. When the concrete panel is heavy, it becomes particularly problematic because it becomes difficult to reinforce the bridge pier submerged under the surface of the river or the bridge pier buried deep in the ground. Moreover, since a reinforcing bar is built in the concrete panel beforehand at the time of manufacture, the concrete panel becomes expensive.

  The present invention has been made in view of such circumstances, and an object thereof is to provide a pier reinforcement unit that is lighter and less expensive and a pier reinforcement structure using the same.

The present invention is a pier reinforcement unit that reinforces the pier by surrounding an existing pier in combination with another pier reinforcement unit, and a form plate that can be separated from the pier and surround the pier. , Arranged in a horizontal direction, arranged vertically along the surface of the form plate facing the pier, and attached to the form plate so as to be separated from the form plate and connected between the pier and the form plate A rebar frame in which a plurality of loop rebars that can be located in a space, a horizontal frame extending in the horizontal direction, and a vertical frame extending in the vertical direction are assembled to form each side of the rectangular parallelepiped, A plurality of crosspieces that are fixed to the mold plate so as to be arranged across the surface of the frame plate facing the bridge pier and extend in the horizontal direction between the two vertical frames arranged at the side edges of the mold plate. A rebar frame configured to be arranged one above the other, and a plurality of Each of the reinforcing bars is placed on one of a plurality of bars arranged on one side end of the mold plate and one of a plurality of bars arranged on the other side end, The bars are arranged in the horizontal direction and are arranged vertically along the form plate.

According to this configuration, the pier reinforcement unit is composed of a formwork plate and a plurality of loop rebars attached to one surface of the formwork plate, so that it is lighter than a concrete panel incorporating a conventional rebar. Can do. Further, according to this configuration, the pier reinforcement unit includes the formwork plate and the plurality of loop reinforcing bars, and it is not necessary to incorporate the reinforcing bars in the concrete panel in advance at the time of manufacture. In addition, since the reinforcing bars are arranged in the horizontal direction and are arranged vertically along the surface of the mold plate that faces the pier, the strength of the reinforcing bars can be improved. In the present invention, the “loop reinforcing bar” means an annular reinforcing bar. Furthermore, according to this configuration, the loop reinforcing bar is attached to the formwork plate by the reinforcing bar frame, so that the strength of the reinforcing bar can be further increased.

  Similarly, the present invention is a pier reinforcement unit that reinforces the pier by surrounding an existing pier in combination with another pier reinforcement unit, and is a mold plate that can be separated from the pier and surround the pier. , Each of which is arranged in a horizontal direction, arranged vertically along the surface facing the pier in the formwork plate, and attached to the formwork plate so as to be connected to be separated from the formwork plate. Loop steel bars that can be positioned in the space between the steel plate, steel plates attached to the form plate so that one flange faces the form plate and the longitudinal direction is vertical, and steel H A plurality of hooks arranged along the outer surfaces of both flanges of the first and second flanges, wherein the plurality of loop rebars are one of a plurality of hooks arranged on the outer surface of one of the flanges of the H steel, and the other. Multiple hooks arranged on the outer surface of the flange By being placed on one, it is Haisuji horizontally, characterized in that it is arranged vertically along the mold plate.

  According to this configuration, the pier reinforcement unit is composed of a formwork plate and a plurality of loop rebars attached to one surface of the formwork plate, so that it is lighter than a concrete panel incorporating a conventional rebar. Can do. Further, according to this configuration, the pier reinforcement unit includes the formwork plate and the plurality of loop reinforcing bars, and it is not necessary to incorporate the reinforcing bars in the concrete panel in advance at the time of manufacture. Therefore, the pier reinforcement unit can be made inexpensive. Moreover, since the reinforcing bars are arranged in the horizontal direction and arranged vertically along the surface of the mold plate facing the bridge pier, the strength of the reinforcing bars can be improved. Furthermore, according to this structure, since the loop reinforcement is attached to the formwork plate by the H steel having the hook, the strength of the reinforcement can be further increased.

  According to another aspect of the present invention, the pier reinforcement units of the present invention are combined with each other to surround an existing pier, and the space between the pier and the form plate is filled with the filler. A pier reinforcement structure is provided, and the reinforced pier can be entirely strong.

  According to the pier reinforcement unit of the present invention, the weight is lighter, and the strength of the pier reinforced by using the pier reinforcement unit can be given as a whole. Moreover, according to the bridge pier reinforcement structure of this invention, the reinforced bridge pier can have intensity | strength as a whole.

  Hereinafter, a pier reinforcement unit and a pier reinforcement structure according to an embodiment of the present invention will be described with reference to the accompanying drawings. In addition, the same component is shown with the same code | symbol and the overlapping description is abbreviate | omitted.

  The pier reinforcement unit of this embodiment surrounds an existing pier by combining a plurality of pier reinforcement units 10, and fills the space between the pier and the pier reinforcement unit with a filler such as concrete to form a reinforced concrete structure. By doing so, the pier can be reinforced. 1 is a perspective view showing a pier reinforcement unit according to a first embodiment of the present invention, FIG. 2 is a plan view thereof, FIG. 3 is a rear view thereof, FIG. 4 is a plan view thereof, and FIG. Is a side view thereof.

  As shown in FIGS. 1-5, the pier reinforcement unit 10 of this embodiment is located in the space between the formwork plate 12 surrounding the pier by connecting a plurality of units, and the pier and the formwork plate 12. A plurality of loop reinforcing bars 14. The mold plate 12 is, for example, a thin iron plate having a width of 1 to 5 m, a height of 1 to 5 m, and a thickness of about 3 to 10 mm, and can have various sizes and shapes. The formwork plate 12 does not have to be strong enough to reinforce the pier itself. However, when the mold plate 12 is an iron plate having a thickness of 16 to 19 mm or more, the mold plate 12 can be further strengthened and can reinforce the pier itself. . As the mold plate 12, in addition to the iron plate, a concrete plate or a molded plate made of synthetic resin such as FRP may be used. In this case, the corrosion resistance of the mold plate 12 can be improved. As shown in FIG. 3, a separator 34 (see FIG. 12) is fixed to the back surface of the mold plate 12 (the surface opposite to the surface facing the pier) to maintain the distance between the mold plate 12 and the pier. A plurality of hand holes 18 are provided. As shown in FIGS. 3 to 5, a suspension piece 20 for lifting the pier replenishment unit 10 with a crane or the like is provided on the back surface of the mold plate 12 during the pier reinforcement work.

  The loop rebar 14 has an oval shape, each of which is made of a steel rod having a diameter of about 10 to 30 mm, is arranged in the horizontal direction, and a plurality of loop rebars 14 are arranged vertically. The upper and lower intervals between the loop reinforcing bars 14 are such that loop reinforcing bars having the same diameter can be inserted between adjacent loop reinforcing bars 14. As shown in FIGS. 1, 2, 4 and 5, each of the loop reinforcing bars 14 arranged vertically is fixed to a plurality of vertically extending assembly bars 16 by welding or the like, and is integrated so as not to be separated separately. It has become. As shown in FIGS. 4 and 5, the plurality of loop reinforcing bars 14 integrated by the assembly bars 16 are separated from the formwork plate 12 by a connecting member 22 fixed to the assembly bars 16 and the formwork plate 12 by welding or the like. They are mounted apart. As shown in FIGS. 2, 4 and 5, the connecting member 22 is a bracket formed by bending an angle steel material into an L-shape, and a brace is attached for reinforcement. The loop reinforcement 14 is positioned in the space between the bridge pier and the formwork plate 12 by the connecting member 22. Moreover, as shown in FIGS. 1-4, the loop reinforcement 14 has the protrusion part 15 which protruded to the side in the both-ends part of the formwork board 12. As shown in FIG. Thereby, the two pier reinforcement units 10 can be combined by fitting the protrusions 15 of the loop reinforcing bars 14 in the two pier reinforcement units 10 alternately.

  FIG. 6 is a perspective view showing the pier reinforcement unit used in the curved portion in the first embodiment of the present invention. As shown in FIG. 6, the pier reinforcement unit 100 used in the bent portion of the present embodiment has the above-described FIGS. 1 to 5 except that the mold plate 12 and the loop reinforcing bar 14 are curved in an arcuate shape in the horizontal plane. The linear pier reinforcement unit 10 shown in FIG. By appropriately combining the above-described linear pier reinforcement unit 10 shown in FIGS. 1 to 5 and the curved pier reinforcement 100 shown in FIG. 6, it is possible to cope with piers having various shapes.

  FIG. 7 is a perspective view showing a state in which two pier reinforcement units in the first embodiment of the present invention are combined. As shown in FIG. 7, when the pier reinforcement units 10 are combined with each other, the protruding portions 15 of the loop reinforcing bars 14 protruding from the sides of the respective formwork plates 12 are alternately fitted. Furthermore, the pier reinforcement units 10 can be combined with each other by inserting the vertical bars 24 in the vertical direction at the portions where the protrusions 15 are fitted to each other and fixing them by welding or the like. The strength of the combined part can be strengthened. In addition to the portion where the protrusions 15 are fitted, the vertical bars 24 can be inserted and fixed inside the loop reinforcing bars 14 in the vertical direction, and the strength can be increased.

  FIG. 8 is a perspective view showing a state where a plurality of pier reinforcement units are combined so as to surround the pier. In the example of FIG. 8, two straight pier reinforcement units 10 are used facing each other, two curved pier reinforcement units 100 connected to each other are used two facing each other, and six are used for convenience. It is in a state to go. The gap between the respective mold plates 12 is closed by the additional mold plate 26.

  FIG. 9 is a perspective view showing a state in which the gap between the mold plates of the combined pier reinforcement unit of the present embodiment is closed using an additional form plate, and FIG. 10 is a perspective view showing the closed state. As shown in FIGS. 9 and 10, when the pier reinforcement units 10 are combined with each other, a gap may be generated between the respective formwork plates 12. In this case, the additional mold plate 26 can enter or abut into the gap, and can be closed by welding, rivet bonding, or the like, thereby closing the gap of the mold plate 12. In this case, each mold plate 12 does not require strict dimensional accuracy, and can cope with various shapes of piers.

  FIG. 11 is a perspective view showing a state where the pier reinforcement units combined so as to surround the pier are stacked in two stages. As shown in FIG. 11, by stacking the pier reinforcement units 10 combined in the horizontal direction in the vertical direction, it is possible to cope with piers having various heights. When stacking the pier reinforcement units 10 in multiple stages, the assembly bars 16 and the vertical bars 24 are joined by hot punching pressure welding or the like. Alternatively, in some cases, the assembly bars 16 and the vertical bars 24 may not be joined. Thereafter, the pier reinforcement units 10 can be stacked in multiple stages by joining the form plates 12 adjacent to each other by welding, rivet joining, or the like. The above-described additional mold plate 26 can be joined at each stage. Or after joining the pier reinforcement unit 10 of all the steps, without joining the additional formwork board 26, you may join the additional formwork board 26. FIG. In this case, you may make it join the long additional form plate 26 extended up and down extending over all the steps.

  FIG. 12 is a diagram illustrating a state in which a gap is formed between the formwork plate and the pier using a separator. When surrounding an existing pier using the pier reinforcement units 10 and 100, it is necessary to maintain a predetermined distance between the pier 28 and the formwork plate 12. In particular, when the filler is filled in the space between the pier 28 and the mold plate 12, it is necessary to resist the mold plate 12 from being pushed out by the pressure of the filler. In the present embodiment, a separator 34 having a predetermined length is driven through a sleeve 32 into a pier anchor drilling hole 30 provided on the pier 28. The separator 34 passes between the loop rebar 14, the assembly bar 16, and the vertical bar 24 and passes through the hand hole 18 provided in the formwork plate 12 shown in FIG. 3. A portion of the separator 34 protruding from the hand hole 18 is fixed to the mold plate 12 by a fixing steel material 36. In this way, the separator 34 can be used to maintain a predetermined distance between the formwork plate and the pier.

  Hereinafter, the pier reinforcement method using the pier reinforcement unit of this embodiment is demonstrated. As shown in FIG. 13, it is assumed that the footing 40 and a part of the pier 28 are below the water surface 42. In this case, first, the foot 40 is crushed to remove the earth and sand 44 deposited on the foot 40. In this embodiment, the combination work of the pier reinforcement units 10 and 100 is easy, and since the formwork plate 12 functions to cut off the water by partitioning the range in which the filler is filled, the range of dredging is 1 to 3 m. A narrow range is acceptable. After that, the work of drilling the pier anchor drilling hole 30 as shown in FIG. The pier anchor drilling hole 30 is drilled at a position where the reinforcing bar does not exist after searching for the position of the reinforcing bar inside the pier 28. After the pier anchor drilling hole 30 is drilled, a sleeve 32 for attaching the separator 34 is driven into the pier anchor drilling hole 30.

  Next, as shown in FIG. 14, after combining the pier reinforcement units 10 and 100 on the water surface 42, the combined pier reinforcement units 10 and 100 are dropped below the water surface 42. And as shown in FIG.7, FIG.15, the vertical reinforcement 24 is inserted and fixed suitably in the part into which the protrusion parts 15 of the loop reinforcement 14 of the pier reinforcement units 10 and 100 are fitting. In order to further improve the strength, a vertical reinforcing bar may be inserted into a portion other than the protrusion 15 inside the loop reinforcing bar 14. Next, as shown in FIG. 12, the separator 34 is inserted from the hand hole 18 and passed between the loop reinforcing bar 14, the assembly reinforcing bar 16, and the vertical reinforcing bar 24, and then fixed with the sleeve 32 and the fixing steel material 36. In this way, the pier 28 can be surrounded by the combined pier reinforcement units 10 and 100. At this time, the space between the pier 28 and the mold plate 12 may be filled with a filler such as underwater concrete and solidified to form a first-stage reinforced concrete structure. In this embodiment, the formwork plate 12 functions to partition and close the range in which the concrete is filled, and the water in the space between the pier 28 and the formwork plate 12 is caused by the underwater concrete having a larger specific gravity than water. Since the replacement is performed, it is not necessary to separately perform a closing operation such as partitioning and draining the vicinity of the pier 28. In this case, when the water depth below the water surface 42 is shallow, normal concrete can be used as a filler.

  Similarly, as shown in FIG. 16, after combining the second-stage pier reinforcement units 10 and 100 on the water surface 42, the combined pier reinforcement units 10 and 100 are dropped below the water surface 42. Thereafter, installation of the vertical stripes 24, installation of the separator, and the like are performed in the same manner as in the first stage. By repeating this process, the pier reinforcement units 10 and 100 can be installed on the piers 28 of various heights. In this case, the pier reinforcement units 10 and 100 at the first stage, the second stage or more on the water surface 42 are combined in advance, and the integrated pier reinforcement units 10 and 100 are dropped below the water surface 42 at a time. May be installed.

  Thereafter, as shown by the arrows in FIG. 17, the space between the pier 28 and the mold plate 12 is filled with a filler and solidified. As the filler, a material that is initially in a fluid form and has a self-hardening property that hardens over time, such as concrete materials such as cement concrete, fiber reinforced concrete (FRC), concrete-polymer composites, For example, mortar materials such as cement mortar, fiber reinforced mortar (FRM), mortar-polymer composite, and resin materials such as epoxy resin and acrylic resin can be used. In this way, a reinforced concrete structure can be formed around the existing bridge pier 28 in which the reinforcing bars are entirely contained.

  According to the present invention, since the pier reinforcement unit is made of a form plate and a reinforcing bar, it can be made lighter than a conventional concrete panel with a built-in reinforcing bar. Moreover, since the pier reinforcement unit of the present invention has a simple structure, it is easy to produce and inexpensive. In addition, the pier reinforcement units 10 and 100 of the present embodiment can be easily transported and transported to the site of pier reinforcement work, and can also be efficiently performed on site. Furthermore, since the pier reinforcement structure formed by the pier reinforcement unit of the present invention has a structure in which the reinforcing bars are entirely contained in the concrete, the strength of the reinforced pier can be increased. Furthermore, since the pier reinforcement units 10 and 100 of this embodiment have the effect | action which partitions off the area where the formwork board 12 fills with concrete, the operation | work which shuts off the water of a river and a large-scale dredging operation become unnecessary. Therefore, it is particularly suitable for reinforcing river piers and large piers buried in soil.

  Hereinafter, a second embodiment of the present invention will be described. FIG. 18 is a perspective view showing the pier reinforcement unit in the second embodiment of the present invention. The pier reinforcement unit 200 of the present embodiment is different from the above-described first embodiment in that a single reinforcing bar 46 is provided as a horizontal reinforcing bar. When combining the pier reinforcement units 200 of this embodiment, the single reinforcing bars 46 of the respective pier reinforcement units 200 are joined together by the sleeves 48 as shown in FIG. In this case, the single reinforcing bars 46 may be joined to each other by welding such as flare welding or pressure welding such as hot punching pressure welding without using the sleeve 48. Others are performed in the same manner as in the case of using the pier reinforcement units 10 and 100 of the first embodiment described above. In this embodiment, since the single rebar 46 is lighter than the loop rebar, the pier reinforcement unit 200 as a whole can be lighter than the pier reinforcement units 10 and 100 of the first embodiment, and can be transported and transported. And work on site can be facilitated.

  Hereinafter, a third embodiment of the present invention will be described. FIG. 20 is a perspective view showing an abutment reinforcement unit in the third embodiment of the present invention. As shown in FIG. 20, the pier reinforcement unit 300 of the present embodiment has a protruding portion 15 that protrudes laterally at one side end of the mold plate 12, and the other side end of the mold plate 12. The point which has the non-protrusion part 17 which does not protrude in the side is different from the pier reinforcement unit 10 of 1st Embodiment which has the protrusion part 15 in the both-ends part of the formwork board 12. FIG. When combining the pier reinforcement units 300 of this embodiment, as shown in FIG. 21, the protrusion part 15 of one pier reinforcement unit 300 and the non-protrusion part 17 of the other pier reinforcement unit 300 are fitted. The mold plates 12 are brought into contact with each other. In this case, the additional mold plate 26 may not be used. Others are performed in the same manner as in the case of using the pier reinforcement units 10 and 100 of the first embodiment described above. Also in this embodiment, the pier reinforcement unit 300 can be reduced in size and weight. Furthermore, when the mold plates 12 are brought into contact with each other, it is not necessary to join additional mold plates.

  The fourth embodiment of the present invention will be described below. FIG. 22 is a perspective view showing an abutment reinforcement unit in the fourth embodiment of the present invention. As shown in FIG. 22, the pier reinforcement unit 400 of the present embodiment is the first embodiment in which only the loop reinforcement 14 is attached in that the loop reinforcement 14 and the single reinforcement 46 are alternately attached up and down. It differs from the pier reinforcement unit 10 of a form. When combining the pier reinforcement units 400 of this embodiment, as shown to FIG. 7 and 19, the loop reinforcement 14 is fitted and the single reinforcement 46 is joined. In this embodiment, by using a part of the single rebar 46, the pier reinforcement unit can be reduced in weight.

  The fifth embodiment of the present invention will be described below. FIG. 23 is a perspective view showing a pier reinforcement unit according to a fifth embodiment of the present invention, FIG. 24 is a front view thereof, FIG. 25 is a plan view thereof, and FIG. 26 is a side view thereof. As shown in FIGS. 23 to 26, in the pier reinforcement unit 500 of the present embodiment, the loop rebar 14 is attached by a rebar frame 54 installed on the mold plate 12. It differs from the pier reinforcement unit 10 of 1st Embodiment attached by.

  As shown in FIGS. 23 to 26, the reinforcing bar frame 54 is assembled so that a horizontal frame 56 that is a bar extending in the horizontal direction and a vertical frame 58 that is a bar extending in the vertical direction form each side of the rectangular parallelepiped. It consists of The reinforcing bar frame 54 is fixed to the mold plate 12. In addition, a suspension piece 62 for lifting the pier replenishment unit 500 with a crane or the like during the pier reinforcement work is provided on the upper part of the reinforcing bar frame 54.

  Between the two vertical frames 58 arranged at one side end of the mold plate 12, a plurality of crosspieces 60 extending in the horizontal direction are arranged vertically. Similarly, a crosspiece 60 is arranged at the other side end of the mold plate 12. The loop reinforcing bars 14 are placed on the crosspieces 60 arranged at both end portions of the mold plate 12. A plurality of loop reinforcing bars 14 are arranged in the vertical direction for each of the crosspieces 60 arranged in a plurality. An assembly bar 16 in the vertical direction is attached to the inside of the loop reinforcing bar 14 having an oval shape by welding or the like. Due to the reinforcing bar frame 54, the loop reinforcing bar 14 is positioned in the space between the bridge pier and the formwork plate 12. Further, as shown in FIGS. 23 to 25, at both end portions of the formwork plate 12, the loop reinforcing bar 14 has a protruding portion 15 protruding sideways.

  Since the loop reinforcement 14 is attached to the formwork board 12 by the reinforcement frame 54, the bridge pier reinforcement unit 500 of this embodiment can make the said intensity | strength stronger.

  The sixth embodiment of the present invention will be described below. 27 is a perspective view showing a pier reinforcement unit according to a sixth embodiment of the present invention, FIG. 28 is a front view thereof, FIG. 29 is a plan view thereof, and FIG. 30 is a side view thereof. As shown in FIGS. 27 to 30, in the pier reinforcement unit 600 of the present embodiment, the loop rebar 14 is arranged by the hook 70 of the H steel 64 attached to the mold plate 12. It differs from the pier reinforcement unit 10 of 1st Embodiment attached by the connection material 22. FIG.

  As shown in FIGS. 27 to 30, the three H steels 64 are attached to the mold plate 12 with the longitudinal direction being vertical. Several angle steels 66 are attached to each H steel 64 by welding or the like, and a spacing member 68 is attached to the angle steel 66 by welding or the like. An end portion of the spacing member 68 is attached to the mold plate 12, and the H steel 64 is disposed away from the mold plate 12 by the spacing member 68. A suspension piece 72 for lifting the pier replenishment unit 600 with a crane or the like during reinforcement of the pier is provided on the upper portion of the H steel 64 located at the side end of the mold plate 12.

  A plurality of hooks 70 are vertically attached to each H steel 64. The loop rebar 14 is placed on the hook 70 attached to each of the H steels 64. A plurality of loop rebars 14 are arranged one above the other for each of the hooks 70 attached thereto. An assembly bar 16 in the vertical direction is attached to the inside of the loop reinforcing bar 14 having an oval shape by welding or the like. The loop rebar 14 is located in the space between the pier and the formwork plate 12 by the H steel 64 having the hook 70. Moreover, as shown in FIGS. 27 to 30, the loop reinforcing bar 14 has a protruding portion 15 that protrudes laterally at both ends of the mold plate 12.

  Since the loop reinforcement 14 is attached to the formwork board 12 by the H steel 64 having the hook 70, the bridge pier reinforcement unit 600 of this embodiment can make the said intensity | strength stronger.

  The seventh embodiment of the present invention will be described below. FIG. 31 is a perspective view showing a state in which the gap between the mold plates of the combined pier reinforcement unit of the present embodiment is closed using an additional form plate, and FIG. 32 is a perspective view showing the closed state. In the present embodiment, a backing plate 74 is attached to the mold plate 12, and the point that the additional mold plate 26 is brought into contact with the backing plate 74 to close the gap between the mold plates 12 is the first. It differs from the pier reinforcement unit 10 of 1 embodiment.

  As shown in FIG. 31, the backing plate 74 is attached to the plate surface of the mold plate 12 on the side where the loop rebar is present, by welding or the like, while protruding from both end portions of the mold plate 12. As shown in FIG. 32, the additional mold plate 26 is brought into contact with the backing plate 74 and bonded by welding, rivet bonding, or the like, so that the gap of the mold plate 12 can be closed. In this case, since the backing plate 74 protrudes from the side end portion of the mold plate 12, the strict dimensional accuracy is not required for the additional mold plate 26 to be brought into contact with the backing plate 74, and various shapes are used. Can be used for piers. In addition, since the backing plate 74 is attached to the plate surface on the side where the loop reinforcing bar of the mold plate 12 is provided, the additional mold plate 26 and the mold plate 12 that are in contact with the backing plate 74 are provided. The level difference is reduced and the unevenness of the structure can be reduced.

  The eighth embodiment of the present invention will be described below. FIG. 33 is a diagram showing a state in which the distance between the mold plate and the bridge pier is maintained using a separator in the eighth embodiment of the present invention. In the first embodiment described above, the pier anchor drilling hole is provided for attaching the separator, whereas this embodiment is different in that a pier anchor drilling hole is not provided and a simpler method is used.

  As shown in FIG. 33, in this embodiment, the separator 50 has the separator edge part 52 which contact | abuts the bridge pier 28 and the formwork board 12 at the said both ends, respectively. The separator 50 is disposed between the loop reinforcing bar 14 and the assembly reinforcing bar 16 and is not particularly fixed. In this case, the separator 50 may be arranged before the pier reinforcement unit is installed on the pier, or the separator 50 may be arranged after the pier reinforcement unit is installed on the pier. After placing the separator 50, as shown in FIG. 33, the dredged earth and sand 44 is backfilled so as to cover the outer periphery of the formwork plate 12, or a sandbag is stacked on the outer periphery of the formwork plate 12. Pressure is applied from the outer periphery of. This pressure is supported by the separator 50. The pressure applied when the filler is filled in the space between the pier 28 and the mold plate 12 is offset by the pressure from the outer periphery of the mold plate 12 by the earth and sand 44.

  In this manner, in the present embodiment, a predetermined distance can be maintained between the mold plate 12 and the pier 28. In this embodiment, since the pier anchor drilling is not provided in order to arrange the separator 50, the pier reinforcement work is facilitated. In addition, since it is not necessary to provide the hand hole 18 or the fixing steel material 36 outside the mold plate 12, there is an advantage that the unevenness of the structure can be reduced.

  The ninth embodiment of the present invention will be described below. FIG. 34 is a diagram showing a state in which the space between the formwork plate and the bridge pier is taken using the butter material in the ninth embodiment of the present invention. In the first embodiment and the eighth embodiment described above, the separator is used to keep the distance between the bridge pier and the formwork plate, whereas in this embodiment, the outer side of the formwork plate is fixed by the butter material 76. By doing so, the point which maintains the space | interval of a bridge pier and a formwork board differs.

  As shown in FIG. 34, in the present embodiment, a plate-like butter material 76 is combined to surround the formwork plate 12, and the formwork plate 12 is fixed. In the example of FIG. 34, four butter materials 76 are brought into contact with each of the four sides of the mold plate 12 of the combined pier reinforcement unit 10, and further, four butter materials 76 are brought into contact with each of the four corners. Thus, the mold plate 12 is fixed. In the present embodiment, the pressure applied when the filler is filled in the space between the pier 28 and the mold plate 12 is supported by the butter material 76. After the filler is solidified, the butter material 76 is removed.

  In the present embodiment, since the separator is not used to maintain the distance between the pier and the formwork plate, the pier reinforcement work is further facilitated. In addition, since it is not necessary to provide the hand hole 18 or the fixing steel material 36 outside the mold plate 12, there is an advantage that the unevenness of the structure can be reduced.

  Note that the pier reinforcement unit and the pier reinforcement structure of the present invention are not limited to the above-described embodiment, and various changes can be made without departing from the scope of the present invention. For example, in the pier reinforcement unit, the number of loop reinforcing bars and single reinforcing bars provided more than those shown in the above embodiment and a number of loop reinforcing bars and single reinforcing bars arranged in the horizontal direction are also included in the scope of the present invention.

It is a perspective view which shows the pier reinforcement unit in 1st Embodiment of this invention. It is a front view which shows the pier reinforcement unit in 1st Embodiment of this invention. It is a rear view which shows the pier reinforcement unit in 1st Embodiment of this invention. It is a top view which shows the pier reinforcement unit in 1st Embodiment of this invention. It is a side view which shows the pier reinforcement unit in 1st Embodiment of this invention. It is a perspective view which shows the pier reinforcement unit used in the curved part in 1st Embodiment of this invention. It is a perspective view which shows a mode that two pier reinforcement units in 1st Embodiment of this invention were combined. It is a perspective view which shows a mode that several pier reinforcement units were combined so that a pier might be surrounded. It is a perspective view which shows a mode that the gap of the formwork board of the bridge pier reinforcement unit of 1st Embodiment of this invention combined is closed using an additional formwork board. It is a perspective view which shows a mode that the gap of the formwork board of the bridge pier reinforcement unit of 1st Embodiment of this invention combined was plugged up using the additional formwork board. It is a perspective view which shows a mode that the pier reinforcement unit combined so that a pier might be surrounded was stacked in two steps. It is a figure which shows a mode that the space | interval of a formwork board and a bridge pier is taken using a separator in 1st Embodiment of this invention. It is a perspective view which shows a mode that it wrinkled on the footing of the pier. It is a perspective view which shows a mode that the 1st step pier reinforcement unit combined so that a pier might be surrounded was arrange | positioned on the footing of a pier. It is a perspective view which shows a mode that the vertical reinforcement was arranged to the pier reinforcement unit arrange | positioned on the footing of the pier in 1st Embodiment of this invention. It is a perspective view which shows a mode that the 2nd step pier reinforcement unit has been arrange | positioned on the 1st step pier reinforcement unit which arranged the vertical reinforcement. It is a perspective view which shows a mode that concrete is inject | poured into the space between a bridge pier and a formwork board. It is a perspective view which shows the pier reinforcement unit in 2nd Embodiment of this invention. It is a perspective view which shows a mode that two pier reinforcement units in 2nd Embodiment of this invention were combined. It is a perspective view which shows the pier reinforcement unit in 3rd Embodiment of this invention. It is a perspective view which shows a mode that the two pier reinforcement units in 3rd Embodiment of this invention were combined. It is a perspective view which shows the pier reinforcement unit in 4th Embodiment of this invention. It is a perspective view which shows the pier reinforcement unit in 5th Embodiment of this invention. It is a front view which shows the pier reinforcement unit in 5th Embodiment of this invention. It is a top view which shows the pier reinforcement unit in 5th Embodiment of this invention. It is a side view which shows the pier reinforcement unit in 5th Embodiment of this invention. It is a perspective view which shows the pier reinforcement unit in 6th Embodiment of this invention. It is a front view which shows the pier reinforcement unit in 6th Embodiment of this invention. It is a top view which shows the pier reinforcement unit in 6th Embodiment of this invention. It is a side view which shows the pier reinforcement unit in 6th Embodiment of this invention. It is a perspective view which shows a mode that the space | interval of the formwork board of the bridge pier reinforcement unit of 7th Embodiment of this invention combined is closed using an additional formwork board. It is a perspective view which shows a mode that the gap of the formwork board of the bridge pier reinforcement unit of 7th Embodiment of this invention combined was block | closed using the additional formwork board. It is a figure which shows a mode that the space | interval of a formwork board and a bridge pier is maintained using a separator in 8th Embodiment of this invention. It is a figure which shows a mode that the space | interval of a formwork board and an abutment is maintained using a butter material in 9th Embodiment of this invention.

Explanation of symbols

DESCRIPTION OF SYMBOLS 10,100,200,300,400,500,600 ... Pier reinforcement unit, 12 ... Formwork board, 14 ... Loop reinforcement, 15 ... Projection part, 16 ... Assembly reinforcement, 17 ... Non-projection part, 18 ... Hand hole, DESCRIPTION OF SYMBOLS 20 ... Suspension piece, 22 ... Connecting material, 24 ... Vertical reinforcement, 26 ... Additional formwork board, 28 ... Pier pier, 30 ... Pier anchor drilling, 32 ... Sleeve, 34 ... Separator, 36 ... Steel material for fixation, 40 ... Footing , 42 ... water surface, 44 ... earth and sand, 46 ... single rebar, 48 ... sleeve, 50 ... separator, 52 ... separator end, 54 ... rebar frame, 56 ... horizontal frame, 58 ... vertical frame, 60 ... crosspiece, 62 ... hanging Piece, 64 ... H steel, 66 ... Angle steel, 68 ... Spacing retaining material, 70 ... Hook, 72 ... Suspension piece, 74 ... Backing plate, 76 ... Butter material.

Claims (3)

A pier reinforcement unit that reinforces the pier by surrounding an existing pier in combination with another pier reinforcement unit,
A form plate that can be spaced apart from the pier and surround the pier;
Respectively arranged in the horizontal direction, arranged vertically along the surface of the mold plate facing the pier, and attached to the mold plate so as to be separated from the mold plate and connected to the pier, A plurality of loop reinforcing bars capable of being positioned in a space between the mold plate and the mold plate,
A rebar frame in which a horizontal frame extending in a horizontal direction and a vertical frame extending in a vertical direction are assembled so as to form each side of a rectangular parallelepiped, and is disposed across a surface of the mold plate facing the bridge pier. In this way, a reinforcing bar frame is arranged so that a plurality of bars extending in the horizontal direction are vertically arranged between the two vertical frames arranged on the side edge of the mold plate so as to be fixed to the mold plate. And comprising
The plurality of loop reinforcing bars are respectively placed on one of the plurality of bars arranged at one side end of the mold plate and one of the plurality of bars arranged at the other side end. The bridge pier reinforcement unit, wherein the reinforcement is arranged in a horizontal direction and arranged vertically along the formwork plate . A pier reinforcement unit that reinforces the pier by surrounding an existing pier in combination with another pier reinforcement unit,
A form plate that can be spaced apart from the pier and surround the pier;
Respectively arranged in the horizontal direction, arranged vertically along the surface of the mold plate facing the pier, and attached to the mold plate so as to be separated from the mold plate and connected to the pier, A plurality of loop reinforcing bars capable of being positioned in a space between the mold plate and the mold plate,
A plurality of H steels attached to the form plate so that one flange faces the form plate and the longitudinal direction is vertical;
A plurality of hooks arranged along the outer surface of both flanges of the H steel,
The plurality of loop reinforcing bars are placed on one of a plurality of hooks arranged on the outer surface of one flange of the H steel and one of a plurality of hooks arranged on the outer surface of the other flange, respectively. The bridge pier reinforcement unit, wherein the reinforcement is arranged in a horizontal direction and arranged vertically along the formwork plate . The pier reinforcement units according to any one of claims 1 to 2 are combined with each other to surround an existing pier, and a space between the pier and the form plate is filled with a filler. Bridge pier reinforcement structure.

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