JP2018150742A - Concrete member reinforcing method and lid member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To propose a concrete member reinforcing method and a lid member used for the method capable of densely filling a reinforcing member insertion hole with a filler even in a case where a shear reinforcing member is disposed in a state where a concrete member is penetrated.SOLUTION: A concrete member reinforcing method comprising: a drilling step of forming a reinforcing member insertion hole 4 penetrating an existing concrete member 1; a shielding step of shielding a back side hole opening 42 of the reinforcing member insertion hole 4 with a first lid member 5; a filling step of passing a shear reinforcing member 2 through the reinforcing member insertion hole 4 and filling the reinforcing member insertion hole 4 with a filler 6; a lid removing step of removing the first lid member 5; and a thickening step of forming a thickened concrete portion on a front surface 11 and a back surface 12 of the existing concrete member 1. The thickened concrete portion is formed in a state involving a base end portion or a tip end portion of the shear reinforcing member 2.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a concrete member reinforcing method and a lid member used therefor.

  It is necessary to reinforce existing reinforced concrete members that are expected to have insufficient shear strength during earthquakes and the like. As such a method for reinforcing the existing concrete member, there is a method in which a reinforcing member insertion hole is formed in the concrete member, a shear reinforcing member is inserted into the reinforcing member insertion hole, and a filler is filled.

  In the shear reinforcement method, it is common to inject a filler with a predetermined pressure into a bottomed reinforcing member insertion hole. On the other hand, when the reinforcing member insertion hole is a through-hole, it is necessary to inject the filler in a state where one of the hole openings is shielded so that the filler does not leak out. For example, in Patent Document 1, the filler is injected into the reinforcing member insertion hole from the injection hole formed in the fixing member in a state where the hole opening is shielded by the fixing member formed at the end of the shear reinforcing member.

  Even when shear reinforcement is performed, a thickened concrete portion may be further formed if, for example, the concrete member is expected to have insufficient bending strength. The thickening method increases the cross-sectional dimension of a concrete member by placing reinforcing bars on the surface of an existing concrete member and placing the concrete (for example, see Patent Document 2).

Japanese Patent No. 3700800 Japanese Patent Laid-Open No. 10-237825

  When using both the shear reinforcement method and the thickening method, if the end of the shear reinforcement member protrudes from the surface of the existing concrete member and is inserted into the thickened portion, the shear reinforcing reinforcing bar placed in the thickened portion is omitted. Or since it can reduce, the effort at the time of construction and the reduction of material cost can be aimed at.

  However, if the shear reinforcement member protrudes from the existing concrete member, the hole of the reinforcement member insertion hole cannot be shielded by the fixing member of the shear reinforcement member. Leaks out.

  From such a point of view, the present invention provides a solid filling of the filler into the reinforcing member insertion hole even when the reinforcing member is disposed in a state where the concrete member as the object to be reinforced is penetrated. It is an object of the present invention to propose a concrete member reinforcing method and a lid material used therefor.

  In order to solve the above-mentioned problems, the concrete member reinforcing method of the present invention includes a drilling step for forming a reinforcing member insertion hole penetrating an existing concrete member, and a back side hole of the reinforcing member insertion hole as a first lid member. A shielding step of shielding by, a filling step of passing the reinforcing member through the reinforcing member insertion hole and filling the reinforcing member insertion hole with a filler, a lid member removing step of removing the first lid member, and the existing A thickening step for forming thickened concrete is provided on the front surface and the back surface of the concrete member. In the filling step, the base end portion of the reinforcing member is protruded from the front side hole of the reinforcing member insertion hole and the distal end portion of the reinforcing member is protruded from the back side hole, and in the thickening step, Concrete is placed with the proximal end or the distal end of the reinforcing member being wound.

  According to the concrete member reinforcing method, since the reinforcing member insertion hole is shielded by the first lid member, the filler can be filled in the reinforcing member insertion hole which is the through hole. Since the reinforcing member is fixed to the thickened concrete portion, the integrity with the existing concrete member is ensured. Here, the reinforcing member of the present specification includes a reinforcing bar and a shear reinforcing member.

  The filling step preferably includes a filling operation for filling the reinforcing member insertion hole with a filler, and a reinforcing member insertion operation for inserting the reinforcing member into the reinforcing member insertion hole after the filling operation.

  When a space is formed inside the first lid member, it is desirable to fill the space with the filler in the filling operation. In this way, when the reinforcing member is inserted, air is prevented from entering the reinforcing member insertion hole from the first lid material side, and the filler in the reinforcing member insertion hole is placed inside the first lid material. Leakage into the space can be prevented.

  In the filling step, the front side hole of the reinforcing member insertion hole is set to a second position in a state where the tip of the reinforcing member is in contact with the first lid member in the reinforcing member insertion hole filled with the filler. A front shielding operation for shielding with a lid material, a lid material penetration operation for penetrating the first lid material and projecting a tip end portion of the reinforcing member from a rear side hole of the reinforcing member insertion hole, and the reinforcing member insertion hole It is desirable to perform additional injection work for additionally injecting the filler. In this case, the second lid member is removed together with the first lid member in the lid member removing step. If it does in this way, even if it is a case where a filler leaks when passing a reinforcement member through a lid | cover material, it can be filled with additional injection | pouring densely. When performing additional injection, the front side hole and the back side hole of the reinforcing member insertion hole are shielded, so that leakage of the filler can be prevented, and the filler can be filled with solidity.

  As the reinforcing member, a member provided with a wire and a fixing member having an outer shape larger than the cross-sectional shape of the wire formed at both ends of the wire may be used. At this time, the first lid member is formed with a first rubber plate in which a through hole having an inner diameter equal to or smaller than the outer diameter of the wire is formed, and a first through hole through which the fixing member on the tip side can be inserted. What is necessary is just to use what laminated | stacked the steel plate and the 2nd steel plate which is a flat plate in order from the said existing concrete member side. According to this first lid material, the first rubber plate is pressed by the first steel plate and the second steel plate, so that the first rubber plate is prevented from being deformed by the pressure when the filler is injected, and consequently Solidity can be secured. In the lid material penetrating work, the reinforcing member penetrates the first lid material by pushing the reinforcing member after removing the second steel plate.

  Further, the second lid member has a second rubber plate in which a through-hole having an inner diameter equal to or smaller than the outer diameter of the wire is formed, and a notch having a width approximately equal to the outer diameter of the wire from the central portion of the plate. What is necessary is just to use what was laminated | stacked in order from the said existing concrete member side with the 3rd steel plate formed to the outer edge. When using this second lid member, while inserting the reinforcing member into the reinforcing member insertion hole in the state where the reinforcing member is inserted into the through hole of the second rubber plate in the front shielding operation, The second rubber plate is brought into contact with the front surface of the existing concrete member, and the third steel plate is attached to the front surface of the second rubber plate, thereby suppressing the deformation of the second rubber plate by the injection pressure of the filler. As a result, leakage of the filler can be prevented.

  When the first lid member has a bottomed cylindrical member, in the filling operation, the distal end portion of the reinforcing member is inserted into the cylindrical member and the filler is placed in the cylindrical member. Fill. By doing so, even if the reinforcing member is disposed so as to penetrate the reinforcing member insertion hole, the filler can be densely filled in the reinforcing member insertion hole.

  The lid material of the present invention is formed by laminating a rubber plate, a first steel plate, and a second steel plate, and the rubber plate is formed with a first through hole and around the first through hole. Radial cuts are formed, and the first steel plate has a second through-hole having a diameter larger than the diameter of the first through-hole, and the second steel plate has the second through-hole. It is a flat plate that can be shielded.

  If such a lid material is used at the time of injecting the filler into the reinforcing member insertion hole, the first steel plate and the second steel plate are laminated, so that the rubber plate is prevented from being deformed by the injection pressure of the filler. Can be suppressed. Therefore, the reinforcing member insertion hole can be filled with the filler material. Moreover, if a 2nd steel plate is removed, a reinforcement member can be arrange | positioned in a reinforcement member insertion hole in the state which penetrated the rubber plate and the 1st steel plate. Thereafter, when the filler is additionally injected into the reinforcing member insertion hole, since the first steel plate is attached to the rubber plate, the deformation of the rubber plate can be suppressed, and hence the leakage of the filler can be prevented. .

  According to the concrete member reinforcing method and the lid material of the present invention, even when the reinforcing member is disposed in a state of passing through the concrete member that is the object to be reinforced, the filler is densely placed in the reinforcing member insertion hole. Filling becomes possible.

It is sectional drawing which shows the reinforcement structure of the existing concrete member which concerns on embodiment of this invention. It is a perspective view which shows a shear reinforcement member. (A) is a flowchart which shows each process of the concrete member reinforcement method which concerns on 1st embodiment, (b) is a flowchart which shows each operation | work of a filling process. It is sectional drawing which shows each process of the concrete member reinforcement method which concerns on 1st embodiment, (a) is a drilling process, (b) is a shielding process, (c) is a filling process. It is a figure which shows the 1st cover material which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is a disassembled perspective view. It is a figure which shows the 2nd cover material which concerns on 1st embodiment, Comprising: (a) is a perspective view, (b) is a disassembled perspective view. It is sectional drawing which shows each process of a concrete member reinforcement method, Comprising: (a) is the filling process following FIG.4 (c), (b) is a cover material removal process, (c) Thickening process. It is a perspective view which shows the cover material which concerns on 2nd embodiment. It is sectional drawing which shows each process of the concrete member reinforcement method which concerns on 2nd embodiment, (a) is a drilling process, (b) is a shielding process, (c) is a filling process. It is sectional drawing which shows each process of the concrete member reinforcement method following FIG. 9, Comprising: (a) And (b) is a cover material removal process, (c) Thickening process.

<First embodiment>
In the present embodiment, as shown in FIG. 1, a concrete member reinforcing method in which a shear reinforcing member (reinforcing member) 2 is disposed on an existing concrete member 1 and a thickened concrete portion 3 is added will be described. The existing concrete member 1 of this embodiment is a wall member made of reinforced concrete. In addition, the existing concrete member 1 is not limited to a wall, For example, a pillar, a beam, etc. may be sufficient.

  The shear reinforcing member 2 is surrounded by the center of the existing horizontal bars and vertical bars (not shown) arranged in a lattice pattern on the existing concrete member 1 (more specifically, the upper and lower horizontal bars and the left and right vertical bars). In the middle of the area. The number and arrangement (arrangement pitch) of the shear reinforcement members 2 arranged on the existing concrete member 1 are not limited. For example, the vertical interval of the shear reinforcement members 2 is made the same as the bar arrangement pitch of the horizontal bars. Alternatively, it may be doubled or more. Similarly, the horizontal interval of the shear reinforcement member 2 may be the same as the bar arrangement pitch of the vertical bars, or may be twice or more. Further, the arrangement of the shear reinforcement member 2 is not limited to the center of the horizontal and vertical bars arranged in a lattice pattern.

  As shown in FIG. 2, the shear reinforcing member 2 includes a wire 21, a distal end fixing member 22 and a proximal end having a shape larger than the cross-sectional shape of the wire 21 provided at the distal end and the proximal end of the wire 21. And a fixing member 23. The shear reinforcing member 2 may be omitted from both ends or one of the fixing members as long as a predetermined fixing length can be secured in the thickened concrete portion 3. Note that the shape of the end face of the wire 21 when the fixing member is omitted is not limited. For example, a surface orthogonal to the axial direction may be formed (dimmed) on the wire, A surface inclined with respect to the axial direction may be formed. As shown in FIG. 1, the front end fixing member 22 and the base end fixing member 23 of the shear reinforcement member 2 arranged in the thickened concrete portion 3 ensure a predetermined covering concrete thickness.

  In the present embodiment, a steel bar is used as the wire 21. In addition, the material which comprises the wire 21 is not limited, For example, a deformed bar, a screw reinforcing bar, etc. may be sufficient. As shown in FIG. 1, the wire 21 has a length greater than the thickness of the existing concrete member 1.

  The distal end fixing member 22 and the proximal end fixing member 23 are formed by fixing a steel plate to the distal end of the wire 21 by friction welding. In addition, the formation method of the front-end | tip fixing member 22 and the base end fixing member 23 is not limited, For example, you may weld and may screw together using a nut. Further, the material constituting the front end fixing member 22 and the base end fixing member 23 is not limited to the steel plate, and may be, for example, a nut or the like screwed into the end of the wire 21. Alternatively, the fixing member (kump-shaped portion) may be formed by striking or pressing in the axial direction with the tip of the wire 21 heated. Further, the front end fixing member 22 and the base end fixing member 23 may be hooks formed by bending the wire 21. Further, the material constituting the front end fixing member 22 and the base end fixing member 23 is not limited to metal or the like.

  The front-end fixing member 22 of the present embodiment is made of a circular plate having a diameter larger than the outer diameter of the wire 21. The shape of the tip fixing member 22 is not limited, and may be, for example, a rectangle or other polygons. On the other hand, the base end fixing member 23 is made of a rectangular plate having a larger shape than the front end fixing member 22. The shape of the base end fixing member 23 is not limited, and may be, for example, a circle, an ellipse, an oval, or a polygon other than a rectangle. The front end fixing member 22 and the base end fixing member 23 may have the same shape.

  The thickened concrete portion 3 is formed on each of the front surface 11 and the back surface 12 of the existing concrete member 1. In the thickened concrete portion 3, a reinforcing bar (not shown) is embedded, and the distal end portion and the proximal end portion of the shear reinforcing member 2 protruding from the front surface 11 and the rear surface 12 of the existing concrete member 1 are wound. In addition, the reinforcing bar diameter, arrangement | positioning pitch, etc. of the reinforcing steel embed | buried in the thick concrete part 3 are not limited, What is necessary is just to determine suitably. Further, the thickened concrete portion 3 may be unreinforced concrete.

As shown in FIG. 3A, the concrete member reinforcing method of the present embodiment includes a drilling step S1, a shielding step S2, a filling step S3, a lid removing step S4, and a thickness increasing step S5.
In the drilling step S1, the reinforcing member insertion holes 4 are formed in the existing concrete member 1 as shown in FIG. The reinforcing member insertion hole 4 is a through hole extending from the front surface 11 to the back surface 12 of the existing concrete member 1.

  Reinforcing member insertion holes 4 are arranged with vertical bars so that the existing reinforcing bars will not be damaged at the time of drilling based on the arrangement of the existing concrete members 1 and the information of nondestructive testing. At the same interval, the vertical interval is the same as the horizontal bar, and is formed at the center of the region surrounded by both reinforcing bars. The piercing operation of the reinforcing member insertion hole 4 is performed substantially perpendicularly to the surface of the existing concrete member 1 from the front surface 11 side to the rear surface 12 side of the existing concrete member 1. The drilling means used for drilling the reinforcing member insertion hole 4 is not limited. For example, a core drill or the like may be used.

  The reinforcing member insertion hole 4 has an inner diameter through which the tip fixing member 22 of the shear reinforcing member 2 can be inserted. That is, the inner diameter of the reinforcing member insertion hole 4 is greater than or equal to the outer diameter of the tip fixing member 22. In the present embodiment, the additional injection groove 43 is formed by cutting out a part of the front side hole 41 of the reinforcing member insertion hole 4. The shape and size of the additional injection groove 43 is not limited and may be determined as appropriate.

  In the shielding step S <b> 2, as shown in FIG. 4B, the back surface side hole opening 42 of the reinforcing member insertion hole 4 is shielded by the first lid material 5. As shown in FIG. 5A, the first lid member 5 of the present embodiment is configured by laminating a first rubber plate 51, a first steel plate 52, and a second steel plate 53. The first rubber plate 51, the first steel plate 52, and the second steel plate 53 are plate materials that are square in front view.

  The first rubber plate 51 is a plate material that comes into contact with the back surface 12 of the existing concrete member 1 when the first lid member 5 is installed in the back surface side hole 42 of the reinforcing member insertion hole 4. As shown in FIG. 5B, a first through hole 54 is formed in the central portion of the first rubber plate 51. The first through hole 54 has an inner diameter that is equal to or smaller than the outer diameter of the wire 21 of the shear reinforcement member 2. That is, the first rubber plate 51 is configured to be in close contact with the outer surface of the wire 21 when the shear reinforcement member 2 is passed through the first through hole 54. A plurality of cuts 55 are radially formed around the first through hole 54. The depth of the cut 55 is set such that the length from the center of the first through hole 54 to the tip (bottom) of the cut 55 is equal to the radius of the tip fixing member 22 of the shear reinforcement member 2. That is, when penetrating the shear reinforcement member 2, the periphery of the first through hole 54 is turned up and pushed away by the notch 55, so that the tip fixing member 22 can be passed through the first through hole 54. The shape and the like of the cut 55 are not limited. Further, the notch 55 may be formed as necessary and may be omitted. In the first rubber plate 51, the first through hole 54 may be omitted and only the cut 55 may be formed. A pair of bolt holes 56 are formed in the first rubber plate 51 at positions facing each other with the first through hole 54 interposed therebetween. In the present embodiment, the bolt holes 56 are formed at the corners located diagonally of the first rubber plate 51, but the arrangement of the bolt holes 56 is not limited. Moreover, the number of the bolt holes 56 is not limited, For example, you may form the bolt hole 56 in each corner | angular part (a total of four places), respectively.

  The first steel plate 52 is a steel plate laminated on the first rubber plate 51. The surface of the first steel plate 52 on the existing concrete member 1 side contacts the first rubber plate 51. The thickness of the first steel plate 52 is set to a size that does not cause deformation due to the injection pressure when the filler is additionally injected into the reinforcing member insertion hole 4. The method for setting the thickness of the first steel plate 52 is not limited. A second through hole 57 having a diameter larger than the diameter of the first through hole 54 and allowing the leading end fixing member 22 of the shear reinforcement member 2 to be inserted is formed in the central portion of the first steel plate 52. The shape and size of the second through-hole 57 are not limited as long as the tip fixing member 22 can be inserted, but in the present embodiment, the second through hole 57 has a circular shape having an inner diameter equal to or larger than the diameter of the tip fixing member 22. Bolt holes 56 are formed in the first steel plate 52 corresponding to the positions of the bolt holes 56 of the first rubber plate 51. That is, in the first steel plate 52, a pair of bolt holes 56, 56 are formed at corners located diagonally.

  The second steel plate 53 is a plate material laminated on the first steel plate 52. The surface of the second steel plate 53 on the existing concrete member 1 side contacts the first steel plate 52. That is, the first rubber plate 51, the first steel plate 52, and the second steel plate 53 are laminated in order from the existing concrete member 1 side. The second steel plate 53 is a flat plate capable of shielding the second through hole 57. The thickness of the second steel plate 53 is set to a size that does not cause deformation due to the injection pressure when the reinforcing member insertion hole 4 is filled with the filler. In addition, the setting method of the board thickness of the 2nd steel plate 53 is not limited, For example, the 1st steel plate 52 and the 2nd steel plate 53 are piled up, and the board thickness by which the deformation | transformation does not arise with the injection pressure of a filler. It may be. Bolt holes 56 are formed in the second steel plate 53 corresponding to the positions of the bolt holes 56 of the first rubber plate 51 and the first steel plate 52. That is, the second steel plate 53 is formed with a pair of bolt holes 56, 56 at corners located diagonally.

  When shielding the back side hole 42 of the reinforcing member insertion hole 4, the first rubber plate 51, the first steel plate 52, and the first rubber plate 51 are attached to the back surface 12 of the existing concrete member 1. The bolt B inserted through the bolt hole 56 of the second steel plate 53 is fastened to the existing concrete member 1.

  In the filling step S <b> 3, the reinforcing member insertion hole 4 is made to penetrate the shear reinforcing member 2 and the reinforcing member insertion hole 4 is filled with the filler 6. As shown in FIG. 3B, the filling step S3 of this embodiment includes a filling operation S31, a reinforcing member insertion operation S32, a front shielding operation S33, a lid material penetration operation S34, and an additional injection operation S35. .

  In the filling operation S31, as shown in FIG. 4B, the reinforcing member insertion hole 4 is filled with the filler 6. The filler 6 is injected by inserting an injection pipe (not shown) into the reinforcing member insertion hole 4 and from the bottom (rear side hole 42 side) of the reinforcing member insertion hole 4. When injected from the bottom of the reinforcing member insertion hole 4 of the filler 6, the injection pipe is pushed back to the front surface 11 side by the pressure of the filler 6, so that the injection material is injected at the tip of the injection pipe into the front side hole 41. Do until it reaches. In the filling operation S31, the filler 6 is also filled into the space (the first through hole 54 and the second through hole 57) formed in the first lid member 5. Moreover, you may perform filling operation | work S31 after implementing reinforcement member insertion operation | work S32.

  In the reinforcing member insertion operation S32, as shown in FIG. 4C, the shear reinforcing member 2 is inserted into the reinforcing member insertion hole 4 filled with the filler 6. The shear reinforcement member 2 is inserted until the tip fixing member 22 contacts the first lid member 5. At this time, the second rubber plate 71 of the second lid member 7 is attached to the shear reinforcement member 2 in advance. When the shear reinforcement member 2 is inserted into the reinforcement member insertion hole 4, the second rubber plate 71 contacts the front surface 11 of the existing concrete member 1. Here, the second lid member 7 of the present embodiment is formed by laminating a second rubber plate 71 and a third steel plate 72 as shown in FIG. The second rubber plate 71 and the third steel plate 72 are plate members that are square in front view.

  The second rubber plate 71 is a plate material that comes into contact with the front surface 11 of the existing concrete member 1 when the second lid member 7 is installed in the front side hole 41 of the reinforcing member insertion hole 4. As shown in FIG. 6B, a third through hole 73 is formed at the center of the second rubber plate 71. The third through hole 73 has an inner diameter equal to or smaller than the outer diameter of the wire 21 of the shear reinforcement member 2. That is, when the shear reinforcement member 2 is passed through the third through hole 73, the second rubber plate 71 is attached to the shear reinforcement member 2. At this time, the inner surface of the third through hole 73 is in close contact with the outer surface of the wire 21. Around the third through-hole 73, a plurality of cuts 74 are formed radially. At least a part of the plurality of cuts 74 is such that the distance between the tips (bottoms) of the cuts 74 facing each other with the third through hole 73 therebetween is the width (short side) of the proximal fixing member 23 of the shear reinforcement member 2. It has a depth equal to or greater than (width). That is, the second rubber plate 71 is configured to allow the proximal end fixing member 23 to be inserted by the notch 74 when the second rubber plate 71 is attached to the shear reinforcing member 2 or removed from the shear reinforcing member 2. The shape and the like of the notch 74 are not limited, and may be determined as appropriate according to the shape of the proximal fixing member 23. The notches 74 may be formed as necessary and may be omitted.

  An additional injection hole 75 is formed in the second rubber plate 71 in the vicinity of the third through hole 73 (in the present embodiment, below the third through hole 73). The additional injection hole 75 passes through the second rubber plate 71. The additional injection hole 75 is formed so as to overlap with the additional injection groove 43 when the second lid member 7 is installed in the front side hole 41 of the reinforcing member insertion hole 4. A pair of bolt holes 76 are formed in the second rubber plate 71 at positions facing each other across the third through hole 73. In the present embodiment, the bolt holes 76 are formed at the corners located diagonally of the second rubber plate 71, but the arrangement of the bolt holes 76 is not limited. Moreover, the number of the bolt holes 76 is not limited, For example, you may form the bolt hole 76 in each corner | angular part (a total of four places), respectively.

  The third steel plate 72 is a steel plate laminated on the second rubber plate 71. The surface of the third steel plate 72 on the side of the existing concrete member 1 contacts the second rubber plate 71. That is, the second rubber plate 71 and the third steel plate 72 are laminated in order from the existing concrete member 1 side. The plate thickness of the third steel plate 72 is set such that no deformation occurs due to the injection pressure when the filler is additionally injected into the reinforcing member insertion hole 4. The third steel plate 72 is formed with a notch 77 having the same width as the outer diameter of the wire from the center of the plate to the outer edge. Bolt holes 76 are formed in the third steel plate 72 corresponding to the positions of the bolt holes 76 of the second rubber plate 71. That is, a pair of bolt holes 76 and 76 are formed at the corners located at the opposite corners of the third steel plate 72. In the third steel plate 72, an additional injection hole 75 may be formed near the bottom of the notch 77 (the center of the third steel plate 72) as necessary.

  In the front shielding operation S <b> 33, as shown in FIG. 7A, the front lid hole 41 of the reinforcing member insertion hole 4 is shielded by the second lid member 7. In the present embodiment, when the shear reinforcement member 2 is inserted into the reinforcement member insertion hole 4 filled with the filler 6, the third rubber plate 71 is disposed on the front surface of the second rubber plate 71 disposed on the front surface 11 of the existing concrete member 1. By attaching the steel plate 72, the front side hole 41 is shielded. At this time, the third steel plate 72 is disposed by dropping the third steel plate 72 from above so that the shear reinforcement member 2 enters the notch 77. The third steel plate 72 may be slid from the side of the shear reinforcing member 2 or may be disposed by being pushed up from the lower side of the shear reinforcing member 2. In addition, what is necessary is just to install the 2nd cover material 7 as needed. When the second lid member 7 is omitted, it is desirable to shield the front side hole 41 as appropriate.

  In the lid material penetrating operation S <b> 34, as shown in FIG. 7A, the distal end portion of the shear reinforcement member 2 is projected from the back surface side hole 42 of the reinforcement member insertion hole 4. The lid material penetration operation S34 is performed before the filler 6 loses fluidity. First, the second steel plate 53 is removed, and then the proximal end side of the shear reinforcement member 2 is pushed into the distal end side. Thereby, the front end fixing member 22 penetrates the first rubber plate 51 and the first steel plate 52, and the front end portion of the shear reinforcement member 2 protrudes from the second steel plate 53. At this time, the base end portion of the shear reinforcement member 2 is in a state of protruding from the second lid member 7. The filler 6 attached to the tip of the shear reinforcement member 2 is removed.

  In the additional injection operation S35, the filler 6 is additionally injected into the reinforcing member insertion hole 4. By additionally injecting the filler 6, the air that has entered the reinforcing member insertion hole 4 is discharged when the shear reinforcing member 2 is inserted into the reinforcing member insertion hole 4 or when the shear reinforcing member 2 is penetrated. . The additional injection of the filler 6 is performed by injecting the filler 6 from the additional injection hole 75 of the second lid member 7. In the present embodiment, the filler 6 is press-fitted with an injection pipe (not shown) through which the notch 77 of the third steel plate 72 is inserted in the additional injection hole 75 of the second rubber plate 71.

  In the lid removing step S4, as shown in FIG. 7B, the first lid 5 and the second lid 7 are removed. The first lid member 5 and the second lid member 7 are removed after a predetermined strength is developed in the filler 6.

  In the thickening step S5, the thickened concrete portions 3 and 3 are formed on the front surface 11 and the back surface 12 of the existing concrete member 1, as shown in FIG. The thickened concrete portion 3 is formed by placing reinforcing bars (not shown) on the front surface 11 and the back surface 12 of the existing concrete member 1 and placing the formwork and then placing concrete. At this time, the concrete is placed in a state where the proximal end portion or the distal end portion of the shear reinforcing member 2 protruding from the front surface 11 and the rear surface 12 of the existing concrete member 1 is involved.

The effect of the concrete member reinforcement method of this embodiment is as follows.
Since the shear reinforcement member 2 penetrating the existing concrete member 1 is fixed to the thickened concrete portion 3, the existing concrete member 1 is subjected to shear reinforcement and bending strength reinforcement at the same time.

  Since the filler 6 is filled in a state where the reinforcing member insertion hole 4 is shielded by the first lid member 5, the filler 6 can be filled in the reinforcing member insertion hole 4 which is a through hole. Further, even when air enters when the shear reinforcing member 2 is inserted into the reinforcing member insertion hole 4, the solidity can be maintained by additionally injecting the filler 6.

  Since the filler 6 is filled in the space (the first through hole 54 and the second through hole 57) formed in the first lid member 5 in the filling operation, the reinforcing member is inserted when the shear reinforcing member 2 is inserted. Air can be prevented from entering the insertion hole 4 from the first lid member 5 side. Since the first steel plate 52 and the second steel plate 53 are laminated on the first lid member 5, it is possible to prevent or minimize the deformation of the first rubber plate 51 due to the injection pressure of the filler 6. As a result, the reinforcing material insertion hole 4 can be filled with the filler 6 densely. Moreover, if the 2nd steel plate 53 is removed, the shear reinforcement member 2 can be arrange | positioned in the reinforcement member insertion hole 4 in the state which made the 1st rubber plate 51 and the 1st steel plate 52 penetrate. Thereafter, when the filler 6 is additionally injected into the reinforcing member insertion hole 4, the first rubber plate 51 is attached to the first rubber plate 51, so that deformation of the first rubber plate 51 can be suppressed. As a result, leakage of the filler 6 can be prevented.

When penetrating the shear reinforcement member 2, the front lid side hole opening 41 of the reinforcement member insertion hole 4 is shielded by the second lid member 7, so that leakage of the filler 6 is prevented, and consequently the inside of the reinforcement member insertion hole 4. Can be maintained. Since the second lid member 7 has a third steel plate 72 attached to the front surface of the second rubber plate 71, the second rubber plate 71 is applied by the pressure of the filler 6 at the time of additional injection or when the shear reinforcement member 2 is pushed in. Can be suppressed, and as a result, leakage of the filler 6 can be prevented.
When penetrating through the shear reinforcement member 2, even if a gap is generated near the front side hole 41 by dragging the filler 6 to the shear reinforcement member 2, solidity is ensured by additional injection. .

<Second Embodiment>
In the present embodiment, as in the first embodiment, a concrete member reinforcing method in which the shear reinforcing member 2 is disposed on the existing concrete member 1 and the thickened concrete portion 3 is added will be described. In the concrete member reinforcement method of the present embodiment, as shown in FIG. 8, a bottomed tubular member (cylinder 58) is used as the first lid member 5 that shields the back side hole opening 42 of the reinforcement member insertion hole 4. It differs from the concrete member reinforcement method of the first embodiment in that it is provided. The details of the existing concrete member 1, the shear reinforcement member 2, and the thickened concrete portion 3 of the present embodiment are the same as the contents shown in the first embodiment, and thus detailed description thereof is omitted.

The concrete member reinforcing method of the present embodiment includes a drilling step S1, a shielding step S2, a filling step S3, a lid member removing step S4, and a thickening step S5 (see FIG. 3A).
In the drilling step S1, the reinforcing member insertion hole 4 is formed in the existing concrete member 1 as shown in FIG. The details of the drilling step S1 are the same as the contents shown in the first embodiment, and thus detailed description thereof is omitted.

  In the shielding step S <b> 2, as shown in FIG. 9B, the back surface side hole opening 42 of the reinforcing member insertion hole 4 is shielded by the first lid material 5. As shown in FIG. 8, the first lid member 5 of the present embodiment includes a cylindrical body 58 and a substrate 59. The cylinder 58 is a bottomed cylindrical member whose tip is shielded. The base end of the cylindrical body 58 is fixed to the plate surface of the substrate 59. The substrate 59 is a rectangular plate material. A through hole (not shown) is formed at the center of the substrate 59. A cylinder 58 is fixed to the edge portion of the through hole. Two bolt holes 56 are formed in the substrate 59. In the present embodiment, one bolt hole 56 is formed on each side of the through hole (tubular body 58). One bolt hole 56 is a horizontally long slot (long hole along the longitudinal direction of the substrate 59), and the other bolt hole 56 is a vertically long slot (long hole along the short direction of the substrate 59). ). The bolt hole 56 is not necessarily a long hole. Further, the direction of the long hole is not limited. When the rear side hole 42 of the reinforcing member insertion hole 4 is shielded, the bolt B through which the bolt hole 56 of the substrate 59 is inserted is fastened to the existing concrete member 1.

  In the filling step S3, as shown in FIG. 9C, the shear reinforcement member 2 is inserted into the reinforcement member insertion hole 4 and the cylindrical body 58 is filled with the filler 6. In this embodiment, after inserting the shear reinforcement member 2 into the reinforcement member insertion hole 4, the reinforcement member insertion hole 4 is filled with the filler 6. The filler 6 may be filled in the reinforcing member insertion hole 4 before inserting the shear reinforcing member 2. The shear reinforcement member 2 is inserted until the end surface of the front-end fixing member 22 contacts the bottom surface of the cylindrical body 58. The filling material 6 is injected from the bottom of the cylinder 58 by inserting an injection pipe (not shown) into the reinforcing member insertion hole 4. When the filler 6 is injected from the bottom, the injection pipe is pushed back to the front surface 11 side by the pressure of the filler 6, so the injection of the filler 6 is performed until the injection pipe reaches the front side hole 41. The filling material 6 may be filled in a state where the front side hole 41 of the reinforcing member insertion hole 4 is shielded by a lid material.

  In the lid removing step S4, the first lid 5 is removed as shown in FIG. The removal of the first lid member 5 is performed after the filler 6 exhibits a predetermined strength. When the first lid member 5 is removed, the filler 6 attached around the tip of the shear reinforcement member 2 (the portion protruding from the existing concrete member 1) is removed, as shown in FIG. A part of the wire 21 and the tip fixing member 22 are exposed. In addition, what is necessary is just to remove the filler 6 adhering to the front-end | tip part of the shear reinforcement member 2 as needed.

  In the thickening step S5, as shown in FIG. 10C, thickened concrete portions 3 and 3 are formed on the front surface 11 and the back surface 12 of the existing concrete member 1. The thickened concrete portion 3 is formed by placing concrete after placing reinforcing bars (not shown) on the front surface 11 and the back surface 12 of the existing concrete member 1. At this time, the concrete is placed in a state where the proximal end portion or the distal end portion of the shear reinforcing member 2 protruding from the front surface 11 and the rear surface 12 of the existing concrete member 1 is involved.

The effect of the concrete member reinforcement method of this embodiment is as follows.
Since the shear reinforcement member 2 penetrating the existing concrete member 1 is fixed to the thickened concrete portion 3, the existing concrete member 1 is subjected to shear reinforcement and bending strength reinforcement at the same time.

  In order to fill the filler 6 in a state where the back side hole 42 of the reinforcing member insertion hole 4 is shielded by the first lid member 5, the filler 6 is filled in the reinforcing member insertion hole 4 which is a through hole. Can do. Further, even when air enters when the shear reinforcing member 2 is inserted into the reinforcing member insertion hole 4, the solidity can be maintained by additionally injecting the filler 6. Since the distal end portion of the shear reinforcement member 2 is inserted into the first lid member 5 and the filler material 6 is filled, the filler material 6 can be filled in the reinforcement member insertion hole 4 densely.

The embodiment of the present invention has been described above. However, the present invention is not limited to the embodiment, and the above-described constituent elements can be appropriately changed without departing from the spirit of the present invention.
For example, the configuration of the lid materials (the first lid material 5 and the second lid material 7) is not limited to those shown in the above embodiments. For example, if it has a yield strength that does not deform with respect to the injection pressure when filling the filler 6 and can penetrate the shear reinforcement member 2, the lid material can be covered with a single rubber plate. It may be configured. In this case, it is desirable to press-fit the filler 6 in a state where the front end fixing member 22 is brought into contact with the opening portion (through hole or notch 55) of the rubber plate.

  Further, the lid member may be a combination of a rubber plate and a flat steel plate. When using this lid material, a rubber plate and a steel plate are laminated in the filling operation, and the steel plate may be removed in the lid material penetrating operation.

  In addition, as the first lid member 5, a material in which the through holes 54 and 57 are formed in advance so as to allow the shear reinforcement member 2 to pass therethrough is employed. You may employ | adopt what forms a through-hole by. That is, the reinforcing member insertion hole 4 may be shielded during the filling operation, and a lid member in which the through hole can be formed may be employed during the lid member penetration operation.

Instead of the additional injection groove 43, an additional injection hole leading to the reinforcing member insertion hole 4 may be formed in the existing concrete member 1.
In the embodiment, the shear reinforcing member 2 is used as the reinforcing member, but the reinforcing member inserted into the reinforcing member insertion hole 4 is not limited to the shear reinforcing member 2. The reinforcing member may be, for example, a reinforcing bar, a PC steel material, a shaped steel material, or the like.

1 Existing concrete member 2 Shear reinforcement member (reinforcement member)
DESCRIPTION OF SYMBOLS 21 Wire 22 Front end side fixing member 23 Base end side fixing member 3 Thickened concrete part 4 Reinforcement member insertion hole 41 Back side hole 42 Front side hole 43 Additional injection groove 5 First lid material 51 First rubber plate 52 First One steel plate 53 Second steel plate 54 First through hole 55 Notch 56 Bolt hole 57 Second through hole 58 Cylindrical body 59 Substrate 6 Filler 7 Second lid material 71 Second rubber plate 72 Third steel plate 73 Third through hole 74 Notch 75 Additional injection hole 76 Bolt hole S1 Drilling process S2 Shielding process S3 Filling process S4 Lid removal process S5 Thickening process S31 Filling work S32 Reinforcing member insertion work S33 Front cover penetration work S34 Cover material penetration work S35 Additional injection work

Claims (8)

Drilling step of forming a reinforcing member insertion hole penetrating an existing concrete member;
A shielding step of shielding the back side hole of the reinforcing member insertion hole with a first lid;
A filling step of passing a reinforcing member through the reinforcing member insertion hole and filling the reinforcing member insertion hole with a filler;
A lid removing process for removing the first lid;
A thickening step for forming a thickened concrete portion on the front and back surfaces of the existing concrete member, and a concrete member reinforcing method comprising:
In the filling step, the base end portion of the reinforcing member protrudes from the front side hole of the reinforcing member insertion hole and the distal end portion of the reinforcing member protrudes from the back side hole.
In the thickening step, concrete is laid in a state in which the proximal end portion or the distal end portion of the reinforcing member is rolled up. The filling step includes
A filling operation for filling the reinforcing member insertion hole with a filler;
The concrete member reinforcing method according to claim 1, further comprising: a reinforcing member inserting operation of inserting the reinforcing member into the reinforcing member inserting hole after the filling operation. A space is formed inside the first lid member,
The concrete member reinforcing method according to claim 2, wherein in the filling operation, the space is filled with the filler. In the filling step,
In the reinforcing member insertion hole filled with the filler, the front side hole of the reinforcing member insertion hole is shielded by the second lid material in a state where the tip of the reinforcing member is in contact with the first lid material. Front shielding work,
A lid material penetrating operation in which the tip end portion of the reinforcing member is caused to penetrate the first lid material and protrude from the back side hole of the reinforcing member insertion hole,
An additional injection operation for additionally injecting a filler into the reinforcing member insertion hole, and
The concrete member reinforcing method according to any one of claims 1 to 3, wherein in the lid removing step, the second lid is removed together with the first lid. The reinforcing member includes a wire and a fixing member having an outer shape larger than a cross-sectional shape of the wire formed on both ends of the wire,
The first lid member is
A first rubber plate in which a through hole having an inner diameter equal to or smaller than the outer diameter of the wire is formed;
A first steel plate formed with a through-hole through which the fixing member on the front end side can be inserted;
The second steel plate that is a flat plate is laminated in order from the existing concrete member side,
5. The concrete member reinforcing method according to claim 4, wherein, in the cover material penetrating operation, the reinforcing member is pushed in after the second steel plate is removed. The reinforcing member includes a wire and a fixing member having an outer shape larger than a cross-sectional shape of the wire formed on both ends of the wire,
The second lid material is
A second rubber plate in which a through hole having an inner diameter equal to or smaller than the outer diameter of the wire is formed;
A third steel plate in which a notch having a width similar to the outer diameter of the wire is formed from the center to the outer edge is laminated in order from the existing concrete member side,
In the front shielding operation, the reinforcing member is inserted into the reinforcing member insertion hole in a state where the reinforcing member is inserted through the through hole of the second rubber plate, and the second rubber plate is attached to the existing concrete member. Work to abut the front,
The method for reinforcing a concrete member according to claim 4, further comprising: attaching the third steel plate to a front surface of the second rubber plate. The first lid member includes a bottomed cylindrical member,
3. The concrete member according to claim 1, wherein in the filling step, a tip end portion of the reinforcing member is inserted into the cylindrical member and the filler is filled into the cylindrical member. Reinforcement method. A lid formed by laminating a rubber plate, a first steel plate, and a second steel plate,
In the rubber plate, a first through hole is formed and a radial cut is formed around the first through hole,
In the first steel plate, a second through hole having a diameter larger than the diameter of the first through hole is formed,
The second steel plate is a flat plate capable of shielding the second through hole.

Images