JP6460835B2 - Reinforcing structure of concrete structure and method of reinforcing the same - Google Patents

Description

  The present invention relates to a reinforcing structure for a concrete structure introduced to reinforce a concrete structure, and a method for reinforcing a concrete structure to reinforce a concrete structure.

  Conventionally, for the purpose of increasing the effect of preventing the displacement of the joint surface of a concrete structure, as applied to a new jointed concrete structure formed by piercing concrete in multiple times, A concrete structure disclosed in Patent Document 1 has been proposed.

  The concrete structure disclosed in Patent Document 1 has a hole provided so as to penetrate the joint surface of the jointed concrete structure from the outer surface of the newly installed joint concrete structure, and the joint surface. It comprises a reinforcing body such as a PC steel material and a steel pipe installed in the hole, and a filler filled in the hole in which the reinforcing body is installed.

  Since the concrete structure disclosed in Patent Document 1 cuts the other end of the injection pipe that protrudes upward from one end opening of the hole after the filler reaches the upper end surface of the pier, the injection pipe Is left inside the reinforcing body such as a steel pipe, and the filler inside the reinforcing body such as a steel pipe is filled with the filler inside the remaining injection pipe.

JP 2011-80240 A

  However, in the concrete structure disclosed in Patent Document 1, when a PC steel material having low rigidity is used as a reinforcing body, the PC steel material is curved in the hole, so that the PC steel material is placed at a predetermined position in the hole. There was a risk that it would be difficult to install. The concrete structure disclosed in Patent Document 1 uses a solid PC steel material as a reinforcing body when an injection tube is used to fill the filler into the hole. May interfere with the filling operation of the filler into the hole.

  Moreover, the concrete structure disclosed in Patent Document 1 is such that the remaining injection pipe is in close contact with the inner peripheral surface of the steel pipe, and no gap is formed between the side surface of the injection pipe and the inner peripheral surface of the steel pipe. Therefore, the filler is not filled between the side surface of the injection pipe and the inner peripheral surface of the steel pipe, and a gap occurs between the side surface of the injection pipe and the inner peripheral surface of the steel pipe, thereby filling the inside of the injection pipe. There was a possibility that the material and the steel pipe would not be integrated. Even if the concrete structure disclosed in Patent Document 1 is a case where a steel pipe is used as a reinforcing body, a straight tubular steel pipe in which no depression is formed on the side surface of the steel pipe is used, and the side surface of the steel pipe is formed in a smooth shape. For this reason, there is a possibility that the hardened filler and the steel pipe do not adhere sufficiently within the hole.

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to concretely harden the filler inside the pipe of the steel pipe main body, thereby providing a concrete structure such as a pier. An object of the present invention is to provide a reinforcing structure for a concrete structure that can sufficiently reinforce an object and a method for reinforcing the same.

The reinforcing structure for a concrete structure according to the first invention is a reinforcing structure for a concrete structure introduced to reinforce the concrete structure, and is inserted into the hole of the concrete structure, and the hole of the concrete structure is inserted. a steel body to the bottom Ru placed in contact, and a filler is filled in the hole of the concrete structure, the steel body may have a tube portion which is formed in a hollow shape inside the steel pipe body and, wherein the filler is characterized in der Rukoto those cured integrally within said tube.

In the reinforcing structure of a concrete structure according to the second invention, in the first invention, the inner diameter of the steel pipe main body is larger than the outer shape of the injection pipe used when the hole of the concrete structure is filled with the filler. It is characterized by.

  A reinforcing structure for a concrete structure according to a third aspect of the present invention is the first or second aspect, wherein the steel pipe body is formed in a concave shape from the outer surface of the steel pipe toward the inside of the steel pipe body in a direction perpendicular to the pipe axis. It has one or a plurality of indentations.

A concrete structure reinforcing method according to a fourth aspect of the invention is a concrete structure reinforcing method for reinforcing a concrete structure, wherein a steel pipe body is inserted into a hole of the concrete structure, and the inside of the steel pipe body is provided. A filling step in which an injection tube for supplying a filler is inserted into the hollow tube and the filler is filled in the hole of the concrete structure using the injection tube; and the filling After filling the hole of the concrete structure with the material, the filling pipe is pulled out from the inside of the pipe and removed, and the steel pipe body is placed in contact with the bottom surface of the hole of the concrete structure, and the filling is performed. characterized in that it comprises a removal step of Ru curing the wood.

  According to the first to fourth inventions, the steel pipe main body filled and hardened with the filler inside the pipe is provided so as to be installed on the concrete upper part and the concrete lower part, thereby acting in the pipe axis direction of the steel pipe main body. It is possible to reinforce concrete structures such as piers so that the upper part of the concrete does not tilt laterally and collapse, as the steel pipe body and the hardened filler are sufficiently resisted by the tensile or compressive force Become.

  According to 1st invention-4th invention, even if it is a case where the shear force of the horizontal direction acts on a steel pipe main body from the concrete upper part, and the steel pipe side surface of the steel pipe main body and the hardened filler contact on the steel pipe contact surface. By ensuring a large steel pipe contact surface of the steel pipe body, the supporting pressure acting on the hardened filler from the side face of the steel pipe is relieved by resisting shear force, and the hardened filler is prevented from being damaged or collapsed. In addition, since the filler hardened inside the pipe of the steel pipe main body restrains the side surface of the steel pipe, it is possible to reliably exert the resistance against the shearing force on the side face of the steel pipe.

  According to 1st invention-4th invention, since injection pipes, such as a tremy tube, are removed from the inside of a pipe of a steel pipe body, after filling a gap material of a hole and a pipe inside of a steel pipe body, a steel pipe body As the filler hardened inside the pipe is not divided in the direction orthogonal to the pipe axis by the side surface of the injection pipe, the filler is hardened integrally inside the pipe of the steel pipe body, thereby hardening against the shearing force in the lateral direction. It becomes possible to remarkably improve the resistance of the filler.

  According to 1st invention-4th invention, since the pipe inside of a steel pipe main body is formed in a substantially hollow shape, it becomes what improved member rigidity remarkably compared with the conventional reinforcing bar, PC steel rod, etc., and concrete From the other end side to the one end side of the hole portion of the structure, a steel pipe body having high member rigidity is installed upright, and the steel pipe body can be accurately aligned in the hole portion.

  In particular, according to the second aspect of the present invention, the injection pipe is inserted into the steel pipe body formed in a substantially hollow shape inside the pipe, and the side surface of the injection pipe is separated from the inner side surface of the steel pipe at a predetermined interval. By installing the injection pipe and the steel pipe main body at predetermined positions of the hole, assuming that the injection pipe and the steel pipe main body do not interfere with each other when filling the material, the filling operation of the filler into the hole is carried out smoothly. It becomes possible.

  In particular, according to the second invention, since the side surface of the injection pipe is separated from the inner surface of the steel pipe at a predetermined interval, the filler is directly brought into contact with the inner surface of the steel pipe when filling the inside of the pipe of the steel pipe body. The steel tube main body and the hardened filling with respect to the tensile force or compressive force in the tube axis direction of the steel pipe main body are firmly integrated with the steel tube main body by filling the hardened filler inside the steel pipe main body and the steel pipe main body. It becomes possible to remarkably improve the resistance of the material.

  In particular, according to the third invention, the steel pipe main body has one or a plurality of indentations, so that the indentations are formed in a concavo-convex shape in the direction perpendicular to the tube axis with respect to the cured filler, and the holes of the concrete structure The filler hardened inside the gap of the steel pipe and the pipe of the steel pipe main body comes into contact with the steel pipe side surface of the steel pipe main body in an uneven shape, thereby improving the integrity of the steel pipe main body and the hardened filler. Adhesion with the filler can be made sufficient.

It is a perspective view which shows the concrete structure in which the reinforcement structure of the concrete structure to which this invention is applied is introduced. It is a perspective view which shows the reinforcement structure of the concrete structure to which this invention is applied. It is a front view which shows the reinforcement structure of the concrete structure to which this invention is applied. (A) is an enlarged front view which shows the steel pipe main body of the reinforcement structure of the concrete structure to which this invention is applied, (b) is the DD sectional view taken on the line. (A) is the AA line cross-sectional view of the steel pipe main body shown in FIG. 4, (b) is the BB line cross-sectional view. (A) is an enlarged front view which shows the steel pipe main body in which the horizontally long hollow part was formed by the reinforcement structure of the concrete structure to which this invention is applied, (b) is a steel pipe main body of a substantially straight tubular normal steel pipe. It is an enlarged front view shown. It is a front view which shows the state by which injection pipes, such as a tremy pipe, are inserted inside the pipe of a steel pipe main body by the reinforcement structure of the concrete structure to which this invention is applied. It is a front view which shows the state by which a filler is discharged from the front-end | tip part of an injection pipe by the reinforcement structure of the concrete structure to which this invention is applied. It is a front view which shows the process in which the filler discharged from the front-end | tip part of the injection pipe is filled in the hole of a concrete structure with the reinforcement structure of the concrete structure to which this invention is applied. It is a front view which shows the process of removing an injection pipe from the pipe inside of a steel pipe main body with the reinforcement structure of the concrete structure to which this invention is applied. It is a front view which shows the state by which the filler was filled into the hole of the concrete structure by the reinforcement structure of the concrete structure to which this invention is applied. It is a front view which shows the state which the external force acted on the concrete structure in which the reinforcement structure of the concrete structure to which this invention was applied was introduced. (A) is an expansion cross-sectional view which shows the steel pipe contact surface of a steel pipe main body by the reinforcement structure of the concrete structure to which this invention is applied, (b) is an expansion which shows the steel bar contact surface of the conventional PC steel bar. It is a cross-sectional view. It is an expanded vertical sectional view which shows the state by which the hollow part of the steel pipe side surface was pinched | interposed into the uneven | corrugated body of a pair of fillers by the reinforcement structure of the concrete structure to which this invention is applied.

  EMBODIMENT OF THE INVENTION Hereinafter, the form for implementing the reinforcement structure 1 of the concrete structure to which this invention is applied is demonstrated in detail, referring drawings.

  As shown in FIG. 1, the reinforcing structure 1 of a concrete structure to which the present invention is applied, for example, to an unreinforced concrete structure such as a bridge pier 8 constructed without a reinforcing bar or the like being disposed in the interior 8b, By providing a separate steel pipe main body 2, the concrete structure is reinforced.

  The concrete structure reinforcement structure 1 to which the present invention is applied is introduced into a concrete structure constructed as, for example, a bridge pier 8 of a bridge such as a railway bridge or a road bridge, a concrete revetment wall, and the like. In order to reinforce an existing concrete structure that has passed for several years or more, a plurality of steel pipe main bodies 2 are provided in the concrete structure at intervals of about 0.3 m to 1 m.

  As shown in Fig. 2, the concrete structure is constructed to be of a predetermined scale by transferring the concrete in multiple times, so the concrete is integrated at the boundary where the concrete is transferred. A discontinuous surface 85 that is not formed is formed. Moreover, even when the concrete structure is continuously placed without dividing the concrete into a plurality of times, a discontinuous surface 85 in which the concrete is not integrated is formed by the occurrence of a cold joint or the like. There is also.

  In the concrete structure, when the discontinuous surface 85 is formed, the placed concrete is divided at the inside 8b with the discontinuous surface 85 as a boundary. As shown in FIG. 3, the concrete structure has a hole with a substantially circular cross-section that is cored by continuously drilling concrete or the like from the outer surface 8 a of the pier 8 or the like toward the inner portion 8 b. 80 is formed through the discontinuous surface 85.

  The hole 80 has, for example, an extension of about 2 m to 30 m from one end side 80 a arranged on the outer surface 8 a of the pier 8 etc. to the other end side 80 b arranged on the inside 8 b of the pier 8 etc. The hole 80 has an extension of at least about 2 m to 3 m on both sides with the discontinuous surface 85 as a boundary. The hole 80 has, for example, a hole inner side surface 81 having a substantially circular cross section from one end side 80a to the other end side 80b, and has a hole diameter of about 15 cm to 30 cm.

  A concrete structure reinforcement structure 1 to which the present invention is applied includes a steel pipe body 2 inserted into a hole 80 of the concrete structure, and a filler 6 filled in the hole 80 of the concrete structure. The steel pipe body 2 has a steel pipe side surface 21 formed so as to have a substantially circular cross section, and has an outer diameter of about 5 cm to 20 cm. The steel pipe main body 2 has an extension of about 2 m to 30 m from the first end 2 a provided on one end side 80 a of the hole 80 to the second end 2 b provided on the other end side 80 b of the hole 80.

  When the steel pipe main body 2 is inserted into the hole 80 of the concrete structure such as the bridge pier 8, the steel pipe side surface 21 of the steel pipe main body 2 and the hole inner side surface 81 of the hole 80 are separated from each other. A gap 82 is formed in the hole 80. The steel pipe main body 2 is made of, for example, a steel pipe of the steel pipe main body 2 by attaching spacers such as a plurality of steel plates extending in a plurality of directions from the side surface 21 of the steel pipe toward the outside in the tube axis orthogonal direction X, or a substantially circular steel plate. The side surface 21 and the hole inner side surface 81 of the hole 80 can be separated from each other. The steel pipe main body 2 is formed in a substantially hollow shape inside the steel pipe main body 2 and has a pipe interior 22 surrounded by the steel pipe side surface 21.

  As shown in FIGS. 4 and 5, the steel pipe main body 2 is formed in a substantially straight tube shape extending in the pipe axis direction Y and a recess 3 formed by hot working or the like toward the inside of the pipe axis orthogonal direction X. And a straight pipe portion 4. The straight pipe portion 4 extends in the pipe axis direction Y by making the steel pipe side face 21 continuous on substantially the same plane in the pipe axis direction Y without making the steel pipe side face 21 uneven in the pipe axis orthogonal direction X of the steel pipe body 2. It is formed in a substantially straight tube shape.

  One or a plurality of the recessed portions 3 are formed in the tube axis direction Y and the tube circumferential direction W of the steel tube main body 2. At this time, the plurality of depressions 3 formed at predetermined intervals in the pipe circumferential direction W of the steel pipe main body 2 are alternately arranged with the steel pipe side faces 21 not uneven in the pipe axis orthogonal direction X. It is formed intermittently in the pipe circumferential direction W without being continuous in the direction W. The plurality of depressions 3 formed at predetermined intervals in the tube axis direction Y of the steel pipe main body 2 are alternately formed with the straight tube portions 4 in the tube axis direction Y, and are not continuous in the tube axis direction Y. , Intermittently in the tube axis direction Y.

  The hollow portion 3 is formed in a concave shape from the outer surface 21a of the steel pipe toward the inside of the steel pipe main body 2 in the direction orthogonal to the pipe axis X by bending the side surface 21 of the steel pipe, and is convex from the inner side surface 21b of the steel pipe. Formed. As shown in FIG. 5, the recess 3 is formed in a convex shape from the inner surface 21 b of the steel pipe toward the inside of the steel pipe body 2 in the pipe axis orthogonal direction X, so that the pipe axis orthogonal direction X of the pipe interior 22 is formed. Is smaller than that of the straight pipe portion 4.

  As shown in FIG. 4, each of the steel pipe main bodies 2 is formed in a substantially elliptical shape or the like extending in the pipe axis direction Y of the steel pipe main body 2, and at about 3 to 9 places in the pipe circumferential direction W. A hollow portion 3 is formed vertically long along the tube axis direction Y of the steel pipe body 2. The steel pipe main body 2 is not limited to this, and as shown in FIG. 6A, each recess 3 may be formed in a horizontally long shape extending in the pipe circumferential direction W of the steel pipe main body 2, and FIG. As shown in FIG. 5, a substantially straight tubular normal steel pipe or the like in which the steel pipe side surface 21 is continuously formed on substantially the same plane and extends in the pipe axis direction Y may be used.

  As shown in FIGS. 7 to 11, the reinforcing structure 1 for a concrete structure to which the present invention is applied is an injection for supplying the filler 6 when the filler 6 is filled in the hole 80 of the concrete structure. The pipe 7 is inserted into the pipe interior 22 of the steel pipe body 2 and the filling pipe 6 is filled in the hole 80 of the concrete structure, and then the injection pipe 7 is removed from the pipe interior 22 of the steel pipe body 2. . Here, the filler 6 is made of a time-curable material such as cement-based material such as mortar or concrete, or a time-curable material such as urethane-based material, so that the gap portion 82 of the hole 80 and the steel pipe body 2 After the tube interior 22 is filled, it cures after a predetermined time has elapsed.

  The method of reinforcing a concrete structure to which the present invention is applied is that the steel pipe body 2 is inserted into the hole 80 of the concrete structure such as the pier 8 and the filling material 6 is inserted into the hole 80 of the concrete structure using the injection pipe 7. And a removing step of pulling and removing the injection pipe 7 from the pipe interior 22 of the steel pipe main body 2 and being introduced to reinforce the concrete structure.

  In the filling step, first, as shown in FIG. 7, the steel pipe body 2 is inserted into a hole 80 formed by drilling a concrete structure such as a pier 8 or the like, and is substantially hollow inside the steel pipe body 2. An injection tube 7 such as a tremy tube is inserted into the tube interior 22 formed in a shape. At this time, in the filling step, for example, a spacer such as a plurality of steel plates extending in the tube axis orthogonal direction X from the side surface 71 of the injection tube 7 or the inner surface 21b of the steel tube, or a substantially circular steel plate at the tip 7b of the injection tube 7 Etc., the side surface 71 of the injection tube 7 and the steel tube inner surface 21b are separated from each other. The injection pipe 7 is formed in a state where the side surface 71 of the injection pipe 7 is spaced from the inner side surface 21b of the steel pipe by a predetermined distance d from the first end 2a to the second end 2b of the steel pipe main body 2. The distal end portion 7b of the injection tube 7 is provided to reach the two end portions 2b.

  Next, in the filling step, as shown in FIG. 8, the distal end portion of the injection tube 7 in which the filler 6 supplied from the base end portion 7 a of the injection tube 7 reaches the second end portion 2 b of the steel pipe body 2. 7b is discharged into the hole 80. At this time, the filler 6 is discharged from the distal end portion 7b of the injection tube 7 so as to be injected into the other end side 80b of the hole portion 80 and from the other end side 80b of the hole portion 80 to the one end side 80a. The gap portion 82 of the portion 80 and the pipe interior 22 of the steel pipe body 2 are filled.

  In the filling step, when the filler 6 is filled into the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2, as shown in FIG. 9, from the other end side 80b of the hole 80 to the one end side 80a, The filler 6 passes through the pipe interior 22 of the steel pipe body 2 between the side surface 71 of the injection pipe 7 and the steel pipe inner side surface 21 b and the gap portion 82 of the hole 80.

  In the removal process, as shown in FIG. 10, the filler 6 is filled into the pipe interior 22 of the steel pipe main body 2 between the side surface 71 of the injection pipe 7 and the steel pipe inner side surface 21 b and the gap portion 82 of the hole 80. Later, the injection tube 7 is pulled up from the other end side 80b of the hole 80 to the one end side 80a. At this time, the injection pipe 7 causes the filler 6 to be discharged from the distal end portion 7b of the injection pipe 7 into the pipe interior 22 of the steel pipe main body 2 while being pulled out from the second end portion 2b of the steel pipe main body 2 to the first end portion 2a. It will be a thing.

  Finally, as shown in FIG. 11, the method for reinforcing a concrete structure to which the present invention is applied is a tube of the steel pipe body 2 in a state where the steel pipe body 2 is installed in the hole 80 of the concrete structure such as the pier 8 or the like. The steel pipe body 2 and the hardened filler 6 are provided in the hole 80 so that the filler 22 filled in the interior 22 and the hole 80 is hardened and penetrates the discontinuous surface 85 of the concrete structure. .

  At this time, the reinforcing structure 1 of the concrete structure to which the present invention is applied is such that the steel pipe body 2 filled and hardened with the filler 6 in the pipe interior 22 has the discontinuous surface 85 of the concrete structure such as the pier 8 as a boundary. The concrete upper part 83 and the concrete lower part 84 are provided to be installed.

  As shown in FIG. 12, the concrete structure such as the bridge pier 8 is divided into the concrete upper part 83 and the concrete lower part 84 with the discontinuous surface 85 as a boundary due to an external force F acting due to an earthquake or the like. The concrete upper part 83 tends to be displaced so as to tilt in the lateral direction. The concrete structure such as the bridge pier 8 tries to be displaced so that the concrete upper portion 83 tilts alternately in the lateral direction because the external force F in the lateral direction acts alternately from the left and right sides.

  The reinforcing structure 1 for a concrete structure to which the present invention is applied has a tensile force P or a compressive force in the pipe axis direction Y applied to the steel pipe body 2 at the discontinuous surface 85 of the concrete structure when the concrete upper part 83 is inclined. C acts. At this time, in the concrete structure reinforcing structure 1 to which the present invention is applied, the pipe interior 22 of the steel pipe body 2 is filled with the filler 6, so that the steel pipe body 2 resists the tensile force P in the tube axis direction Y. The hardened filler 6 resists the compressive force C in the tube axis direction Y.

  In the concrete structure reinforcing structure 1 to which the present invention is applied, since the hardened filler 6 resists the compressive force C in the tube axis direction Y, the compressive force C in the tube axis direction Y is applied to the steel pipe body 2. Therefore, it is possible to prevent buckling deformation of the steel pipe body 2. Further, the reinforcing structure 1 for a concrete structure to which the present invention is applied is such that the concrete upper portion 83 is displaced so as to be alternately inclined in the lateral direction, whereby the tensile force P and the compressive force C in the tube axis direction Y generate the steel pipe body. However, since the filler 6 hardens in the pipe interior 22 of the steel pipe main body 2, the side surface 21 of the steel pipe is restrained by the hardened filler 6, thereby preventing buckling deformation of the steel pipe main body 2. It becomes possible.

  Thus, the concrete structure reinforcement structure 1 to which the present invention is applied is provided so that the steel pipe body 2 filled and hardened with the filler 6 in the pipe interior 22 is installed on the concrete upper part 83 and the concrete lower part 84. As a result, the concrete upper portion 83 tilts in the lateral direction, as the steel pipe body 2 and the hardened filler 6 are sufficiently resisted by the tensile force P or the compression force C acting in the tube axis direction Y of the steel pipe body 2. It is possible to reinforce the concrete structure such as the pier 8 so as not to collapse.

  Further, the concrete structure such as the pier 8 is divided by the discontinuous surface 85 because the lateral external force F acts due to an earthquake or the like, and the concrete upper portion 83 and the concrete lower portion 84 are divided by the discontinuous surface 85 as a boundary. The transverse shear force S acts on the steel pipe body 2.

  Here, the reinforcing structure 1 of a concrete structure to which the present invention is applied resists the tensile force P acting in the pipe axis direction Y of the steel pipe body 2, as shown in FIG. The steel pipe main body 2 having a predetermined steel pipe cross-sectional area is required only in the cross-sectional portion of the pipe body that forms the pipe. Further, the conventional PC steel rod 9 also resists the same level of tensile force P, so that it has the same degree as the cross-sectional portion of the tubular body forming the steel pipe side surface 21 of the steel pipe body 2 as shown in FIG. It is necessary to have a cross-sectional area of

  As shown in FIG. 13, the reinforcing structure 1 for a concrete structure to which the present invention is applied has a substantially hollow pipe interior 22 formed in the steel pipe main body 2, so that a tubular body that forms the steel pipe side surface 21 of the steel pipe main body 2 is formed. The steel pipe contact surface 23 between the steel pipe side surface 21 of the steel pipe main body 2 and the hardened filler 6 is made to be the same as the conventional steel pipe cross-sectional area of the PC steel bar 9 and the cross-sectional area of the conventional PC steel bar 9. The steel bar contact surface 90 between the PC steel bar 9 and the hardened filler 6 can be made larger.

  Thereby, as shown in FIGS. 12 and 13, the reinforcing structure 1 for a concrete structure to which the present invention is applied has a lateral shearing force S acting on the steel pipe body 2 from the concrete upper portion 83, and Even when the steel pipe side surface 21 and the hardened filler 6 come into contact with each other at the steel pipe contact surface 23, the steel pipe contact surface 23 of the steel pipe main body 2 is ensured to be large, so that the steel pipe side surface 21 resists the shearing force S. Since the supporting pressure acting on the cured filler 6 is relaxed, it is possible to prevent the cured filler 6 from being damaged or collapsed. Furthermore, the reinforcing structure 1 for a concrete structure to which the present invention is applied has a reliable resistance to the shearing force S on the steel pipe side surface 21 because the filler 6 hardened in the pipe interior 22 of the steel pipe body 2 restrains the steel pipe side surface 21. Can be demonstrated.

  The concrete structure reinforcement structure 1 to which the present invention is applied is such that after filling the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe body 2 with the filler 6, as shown in FIG. Since the pipe 7 is removed from the pipe interior 22 of the steel pipe body 2, the filler 6 hardened in the pipe interior 22 of the steel pipe body 2 is not divided by the side surface 71 of the injection pipe 7 in the tube axis orthogonal direction X. Can do. Thereby, the reinforcing structure 1 of the concrete structure to which the present invention is applied is such that the filler 6 hardened in the pipe interior 22 of the steel pipe body 2 is not divided by the injection pipe 7 and is filled in the pipe interior 22 of the steel pipe body 2. By integrally curing 6, it becomes possible to remarkably improve the resistance of the cured filler 6 to the transverse shear force S and the like.

  The concrete structure reinforcing structure 1 to which the present invention is applied has a significantly improved member rigidity compared to conventional reinforcing bars, PC steel rods 9 and the like because the pipe interior 22 of the steel pipe body 2 is formed in a substantially hollow shape. It will be what you let. Thereby, the reinforcing structure 1 of the concrete structure to which the present invention is applied has the steel pipe main body 2 with high member rigidity installed upright from the other end side 80b to the one end side 80a of the hole 80, and It becomes possible to accurately align the steel pipe main body 2.

  As shown in FIG. 9, the reinforcing structure 1 for a concrete structure to which the present invention is applied is such that the injection pipe 7 is inserted into a steel pipe body 2 in which the pipe interior 22 is formed in a substantially hollow shape. Is separated from the inner surface 21b of the steel pipe at a predetermined distance d, so that the injection pipe 7 and the steel pipe main body 2 can be prevented from interfering with each other when the hole 6 is filled with the filler 6. Accordingly, the concrete structure reinforcement structure 1 to which the present invention is applied assumes that the injection pipe 7 and the steel pipe main body 2 do not interfere with each other at the hole 80, and the injection pipe 7 and the steel pipe main body 2 are placed at predetermined positions of the hole 80. It becomes possible to carry out the filling operation of the filler 6 into the hole 80 smoothly.

  In the reinforcing structure 1 for a concrete structure to which the present invention is applied, the side surface 71 of the injection pipe 7 is separated from the inner side surface 21b of the steel pipe by a predetermined distance d. Further, the filler 6 can be cured while being in direct contact with the inner surface 21b of the steel pipe. Thereby, the reinforcing structure 1 of the concrete structure to which the present invention is applied is obtained by firmly integrating the filler 6 hardened in the pipe interior 22 of the steel pipe main body 2 and the steel pipe main body 2 so that the pipe axial direction of the steel pipe main body 2 is obtained. It becomes possible to remarkably improve the resistance of the steel pipe body 2 and the hardened filler 6 to the tensile force P or compressive force C of Y.

  As shown in FIG. 14, the concrete structure reinforcing structure 1 to which the present invention is applied has a recessed portion 3 formed in a concave shape from the outer surface 21 a of the steel pipe toward the inner side of the pipe axis orthogonal direction X of the steel pipe body 2. At the same time, the recess 3 is formed in a convex shape from the inner surface 21b of the steel pipe. At this time, the reinforcing structure 1 of the concrete structure to which the present invention is applied has a pair of irregularities in the tube axis orthogonal direction X of the steel pipe body 2 as the filler 6 is cured along the shape of the recess 3. An uneven body 60 of the filler 6 is formed, and the recess 3 is sandwiched between the uneven bodies 60 of the pair of fillers 6. Thereby, the reinforcement structure 1 of the concrete structure to which the present invention is applied has the integrity of the steel pipe body 2 and the hardened filler 6 by the depression 3 being sandwiched between the concave and convex bodies 60 of the pair of fillers 6. Thus, the adhesion between the steel pipe body 2 and the filler 6 can be remarkably improved.

  In the reinforcing structure 1 of a concrete structure to which the present invention is applied, the filler 6 is filled into the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe body 2 from the other end side 80b of the hole 80 to the one end side 80a. For this reason, it is possible to fill the hole 80 with the filler 6 without any gap using the dead weight of the filler 6 in order from the other end 80b of the hole 80 toward the one end 80a.

  In addition, the reinforcement structure 1 of the concrete structure to which the present invention is applied shall have a plurality of steel pipe main bodies 2 connected in the pipe axis direction Y when the extension of the hole 80 of the concrete structure becomes long. You can also.

  As mentioned above, although the example of embodiment of this invention was demonstrated in detail, all the embodiment mentioned above showed only the example of actualization in implementing this invention, and these are the technical aspects of this invention. The range should not be construed as limiting.

  For example, the concrete structure reinforcing structure 1 to which the present invention is applied can be introduced into a new concrete structure. In addition, the concrete structure reinforcing structure 1 to which the present invention is applied can be introduced into a new or existing concrete structure as a reinforcement for a reinforced concrete structure in which reinforcing bars and the like are disposed.

DESCRIPTION OF SYMBOLS 1: Reinforcement structure of concrete structure 2: Steel pipe main body 2a: 1st end part 2b: 2nd end part 21: Steel pipe side surface 21a: Steel pipe outer side surface 21b: Steel pipe inner side surface 22: Pipe inside 23: Steel pipe contact surface 3: Recess Part 4: Straight pipe part 6: Filler 60: Concavity and convexity 7: Injection pipe 7a: Base end part 7b: Tip part 71: Side face 8: Pier 8a: Outer surface 8b of bridge pier: Inside bridge pier 80: Hole 80a: One end Side 80b: Other end side 81: Hole inner side surface 82: Gap 83: Concrete upper part 84: Concrete lower part 85: Discontinuous surface W: Pipe circumferential direction X: Pipe axis orthogonal direction Y: Pipe axis direction

Claims (4)

A reinforcing structure of a concrete structure introduced to reinforce a concrete structure,
Is inserted into the hole of the concrete structure, comprising: a steel body which on the bottom of the hole Ru placed in contact with the concrete structure, and a filler is filled in the hole of the concrete structure,
The steel body, the steel pipe have a tube portion which is formed in a hollow shape inside the body, the filler, the concrete structure, characterized in der Rukoto those cured integrally within said tube Reinforcement structure. 2. The reinforcing structure for a concrete structure according to claim 1, wherein an inner diameter of the steel pipe main body is larger than an outer shape of an injection pipe used when the filler is filled in a hole of the concrete structure. 3. The concrete structure according to claim 1, wherein the steel pipe main body has one or a plurality of indentations formed in a concave shape from the outer surface of the steel pipe toward the inside of the steel pipe main body in a direction orthogonal to the pipe axis. Reinforcement structure of things. A method for reinforcing a concrete structure for reinforcing a concrete structure,
The steel pipe body is inserted into the hole of the concrete structure, and an injection pipe for supplying a filler is inserted into the hollow pipe formed inside the steel pipe body, and the injection pipe is used. A filling step of filling the pores of the concrete structure with the filler;
After filling the filling material into the hole of the concrete structure, the injection pipe is pulled out from the inside of the pipe and removed, and the steel pipe body is placed in contact with the bottom surface of the hole of the concrete structure, method for reinforcing a concrete structure, characterized in that it comprises a removal step of Ru curing the filling material.

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