JP2016156232A - Reinforcement steel pipe and concrete construction reinforcement structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a reinforcement steel pipe and a concrete construction reinforcement structure which achieve sufficient adhesion between a steel pipe body and a filling material in a hole section on a concrete construction and significantly improve filling property of the filling material.SOLUTION: A reinforcement steel pipe 1 to reinforce a concrete construction comprises a hollow steel pipe body 2 to be inserted into a hole section 80 provided on the concrete construction. The steel pipe body 2 has one or more through hole 20 penetrating a side face 21 thereof to allow a filling material 6 to pass therethrough when the filling material 6 is filled in the hole section 80 on the concrete construction.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a reinforced steel pipe provided to reinforce a concrete structure and a reinforcing structure of a concrete structure introduced 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.

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. In the concrete structure disclosed in Patent Document 1, when an injection pipe is used to fill a filler with a hole, a solid PC steel material is used as a reinforcing body. May interfere with the filling operation of the filler into the hole.

  Moreover, even when 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 a hollow portion is not formed on the side surface of the steel pipe is used, and the side surface of the steel pipe is smooth. As a result, the cured filler and the steel pipe may not be sufficiently adhered in the hole. In the concrete structure disclosed in Patent Document 1, even when the injection pipe is inserted into the hole and the filler is injected from the lower end of the hole, the extension of the hole becomes long and the steel pipe becomes an obstacle. As a result, there is a possibility that a portion where the filling of the filler is insufficient at the intermediate portion or the upper end portion in the hole is formed.

  Therefore, the present invention has been devised in view of the above-mentioned problems, and the object of the present invention is to install a steel pipe body at a predetermined position of a hole portion of a concrete structure and An object of the present invention is to provide a reinforcing steel pipe and a reinforcing structure for a concrete structure in which the adhesion between the main body and the filler is sufficient and the filling property of the filler is greatly improved.

  A reinforced steel pipe according to a first aspect of the present invention is a reinforced steel pipe provided to reinforce a concrete structure, and includes a hollow steel pipe body that is inserted into a hole of the concrete structure. When filling a hole in a concrete structure with a filler, one or a plurality of through holes through which the filler passes are formed by penetrating the side surface of the steel pipe.

  A reinforcing steel pipe according to a second invention is the reinforcing steel pipe according to the first invention, wherein the steel pipe main body has one or a plurality of indentations formed concavely from the outer surface of the steel pipe toward the inner side in the direction perpendicular to the pipe axis of the steel pipe main body. And the said through-hole is formed in the said hollow part, It is characterized by the above-mentioned.

  A reinforcing steel pipe according to a third invention is the reinforced steel pipe according to the second invention, wherein the recess has a deepest concave portion deeper than the outer surface of the steel pipe toward the inside in the direction perpendicular to the pipe axis of the steel pipe body, The hole is formed so as to include a part or all of the deepest portion.

  The reinforcing steel pipe according to a fourth invention is the reinforcing steel pipe according to any one of the first invention to the third invention, wherein the through hole is a cross section of each steel pipe in the pipe axis direction of the steel pipe main body, and is one place in the pipe circumferential direction of the steel pipe main body. It is formed as follows.

  The reinforced steel pipe according to a fifth aspect of the present invention is the reinforced steel pipe according to any one of the first to fourth aspects of the invention, wherein the through hole has a substantially circular shape having a diameter in the pipe circumferential direction of the steel pipe body, or the pipe circumferential direction of the steel pipe body. Is formed in a substantially elliptical shape with a short diameter, and the diameter or the short diameter is 5 mm or more and 25 mm or less.

  A reinforcing structure for a concrete structure according to a sixth aspect of the present invention is a reinforcing structure for a concrete structure that is introduced to reinforce the concrete structure, and is formed in a hollow shape that is inserted into a hole of the concrete structure. A steel pipe main body and a filler filled in a hole of the concrete structure, and the steel pipe main body allows the filler to pass when the hole of the concrete structure is filled with the filler. One or a plurality of through holes are formed by penetrating the side surface of the steel pipe.

  According to 1st invention-5th invention, since a through-hole is formed in the steel pipe side surface of a steel pipe main body, in the area between the other end side and one end side of a hole part, the clearance part of a hole part and a steel pipe main body Thus, the filler passes through the through-holes and is alternately accommodated between the inside of the tube and the filling property of the filler in the hole can be greatly improved.

  According to 1st invention-5th invention, the filler hardened | cured in the clearance gap of a hole part and the filler hardened | cured inside the pipe | tube of a steel pipe main body were connected through the filler hardened | cured by the through-hole. It becomes a state, and the integrity of the steel pipe body and the hardened filler is improved and the adhesion between the steel pipe body and the filler is remarkably improved by forming the locking body of the filler so as to pass through the through hole. It becomes possible to improve.

  In particular, according to the second invention, since the filler is cured along the shape of the depression, a pair of irregularities of the filler that are irregular in the direction perpendicular to the tube axis of the steel pipe body is formed, and the depression is formed. By being sandwiched between the pair of concavo-convex bodies, it is possible to improve the integrity of the steel pipe body and the hardened filler, and remarkably improve the adhesion between the steel pipe body and the filler.

  In particular, according to the third invention, the through hole is formed so as to include part or all of the deepest part of the hollow part, and the deepest part where the plastic deformation of the side surface of the steel pipe is maximized is removed. It is possible to provide a highly reliable steel pipe body by removing a portion where the strength becomes unstable due to deformation.

  In particular, according to the fourth invention, in each steel pipe cross section in the pipe axis direction of the steel pipe body, a through hole is formed in one or less places in the pipe circumferential direction of the steel pipe body. Compared with the case where a hole is formed, an increase in cross-sectional defects in the cross section of the steel pipe can be suppressed, so that it is possible to prevent a decrease in tensile strength, compression strength, etc. of the steel pipe body.

  In particular, according to the fifth invention, since the through hole is formed so that the diameter or minor axis thereof is 5 mm or more and 25 mm or less, the aggregate contained in the filler can be easily passed through the through hole. As a result, it becomes possible to smoothly carry out the accommodation of the filler. In particular, since the through-holes are formed in a substantially elliptical shape, in each steel pipe cross section in the pipe axis direction of the steel pipe body, the longitudinally formed through-holes are aggregated while suppressing an increase in cross-sectional defects on the side surfaces of the steel pipe. Etc. can easily pass through, and it is possible to very smoothly implement the filling of the filler containing aggregates and the like.

  According to the sixth invention, since the steel pipe body is formed in a substantially hollow cross section, it is assumed that the member rigidity is remarkably improved as compared with conventional reinforcing bars, PC steel bars, etc., from the other end side of the hole. Since the steel pipe main body having high member rigidity can be installed upright to one end side, it is possible to accurately align the steel pipe main body in the hole. In addition, the injection pipe is inserted into the steel pipe main body formed in a substantially hollow cross section, and the injection pipe and the steel pipe main body are installed at predetermined positions of the hole without causing the injection pipe and the steel pipe main body to interfere with each other. It becomes possible to smoothly perform the filling operation of the filler into the hole.

  According to the sixth invention, since the through hole is formed on the side surface of the steel pipe body, in the section between the other end side and the one end side of the hole portion, Thus, the filler passes through the through-holes and is interchanged alternately, so that the hole can be filled with the filler without any gap, and the filler can be filled in the hole with a high density.

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 a concrete structure to which this invention is applied, and a reinforcement steel pipe. It is a front view which shows the reinforced steel pipe and the hole of a concrete structure to which this invention is applied. (A) is an enlarged front view which shows the reinforced steel pipe 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 reinforced steel pipe to which this invention shown in FIG. 4 is applied, (b) is the BB line cross-sectional view. It is an enlarged front view which shows the hollow part and through-hole of a reinforced steel pipe to which this invention is applied. (A) is an expanded front view which shows the steel pipe main body by which the horizontally long hollow part was formed with the reinforced steel pipe to which this invention is applied, (b) is an enlarged front view which shows the steel pipe main body of a substantially straight tubular normal steel pipe It is. 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 a hole with the reinforcement structure of the concrete structure to which this invention is applied. It is an enlarged front view which shows the state which a filler passes a through-hole 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 with which the filler was filled with 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. (A) is an expanded longitudinal cross-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 reinforced steel pipe to which this invention is applied, (b) is a through-hole of the steel pipe side surface It is an expanded longitudinal cross-sectional view which shows the state by which the latching body of the filler was penetrated.

  DESCRIPTION OF EMBODIMENTS Hereinafter, embodiments for carrying out a reinforcing steel pipe 1 to which the present invention is applied and a concrete structure reinforcing structure 7 to which the present invention is applied will be described in detail with reference to the drawings.

  As shown in FIG. 1, the reinforcing structure 7 of a concrete structure to which the present invention is applied is, for example, an unreinforced concrete structure such as a bridge pier 8 constructed without a reinforcing bar or the like disposed in the interior 8b. By separately providing the reinforced steel pipe 1 to which the present invention is applied, the concrete structure is reinforced.

  The concrete structure reinforcement structure 7 to which the present invention is applied is, for example, a reinforced steel pipe 1 to which the present invention is applied to a concrete structure constructed as a bridge pier 8 of a bridge such as a railway bridge or a road bridge, or a concrete revetment wall. It is introduced by providing the steel pipe main body 2 which concerns on this, and in particular, in order to reinforce the existing concrete structure which passed several years or more after construction. In the reinforced steel pipe 1 to which the present invention is applied, a plurality of steel pipe main bodies 2 are provided in a 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 a hole diameter of about 15 cm to 30 cm, for example, by forming the hole inner side surface 81 so as to have a substantially circular cross section from one end side 80a to the other end side 80b.

  A reinforced steel pipe 1 to which the present invention is applied includes a steel pipe main body 2 formed in a substantially hollow cross section that is inserted into a hole 80 of a 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 body 2 is formed to have a substantially hollow cross section, whereby a pipe interior 22 is formed inside the steel pipe side face 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 by bending the steel pipe side surface 21 toward the inner side in the tube axis orthogonal direction X of the steel pipe main body 2. The hollow portion 3 is depressed in the pipe circumferential direction W of the steel pipe body 2 by pressing the steel pipe side surface 21 in a deepest and concave shape than the steel pipe outer surface 21a toward the inside of the pipe axis orthogonal direction X of the steel pipe body 2. The deepest portion 3 a is formed at the approximate center of the portion 3.

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

  As shown in FIGS. 4 to 6, the steel pipe body 2 penetrates the steel pipe side surface 21 in the pipe axis orthogonal direction X to form one or a plurality of through holes 20. In the steel pipe main body 2, one through hole 20 is formed in a part or all of the plurality of depressions 3. The steel pipe main body 2 is not limited to this, and a part or all of the through holes 20 may be formed in the straight pipe part 4 or the like that is a place where the hollow part 3 is not formed.

  As shown in FIG. 5 (a), the steel pipe main body 2 has a portion in which the through hole 20 is formed only at one position in each steel pipe cross section in the pipe axis direction Y of the steel pipe main body 2, and FIG. 5 (b). As shown, the through-hole 20 is formed at one place or less in the pipe circumferential direction W of the steel pipe main body 2 with a part where the through-hole 20 is not formed at one place. The steel pipe main body 2 is not limited thereto, and through holes 20 may be formed at a plurality of locations in each steel pipe cross section in the pipe axis direction Y of the steel pipe main body 2.

  As shown in FIGS. 5 and 6A, the through-hole 20 has a substantially circular shape having a diameter d in the pipe circumferential direction W of the steel pipe body 2, or as shown in FIGS. 5 and 6B. The pipe body circumferential direction W of the steel pipe main body 2 is formed into a substantially elliptical shape with the short diameter d1 and the pipe axis direction Y of the steel pipe main body 2 with the long diameter d2. At this time, the through-hole 20 is formed so that the diameter d or the minor axis d1 is 5 mm or more and 25 mm or less. When the through-hole 20 is formed in the recess 3, a part or all of the deepest portion 3 a of the recess 3 is formed by cutting the steel pipe side surface 21 around the deepest portion 3 a of the recess 3. Formed to include.

  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. 7A, 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 FIG. 2, the reinforcing structure 7 of the concrete structure to which the present invention is applied includes a steel pipe body 2 according to the reinforced steel pipe 1 to which the present invention is applied, and a filler 6 filled in the hole 80 of the concrete structure. With. 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 pipe interior 22 of the steel pipe main body 2 are used. After a predetermined time has passed, the resin is cured.

  The concrete structure reinforcement structure 7 to which the present invention is applied includes a steel pipe body 2 installed in a hole 80 of a concrete structure such as a bridge pier 8 and the like, as shown in FIGS. By going through a filling step of filling the filler 80 into the hole 80 and a removal step of pulling out and removing the injection tube 70, the concrete material is introduced to reinforce the concrete structure.

  In the filling process, first, as shown in FIG. 8, the steel pipe body 2 according to the reinforced steel pipe 1 to which the present invention is applied is inserted into the hole 80 formed by drilling a concrete structure such as the pier 8 or the like. At the same time, an injection pipe 70 such as a tremy pipe is inserted into the pipe interior 22 of the steel pipe body 2. 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 of the injection tube 70 or the inner surface 21b of the steel tube, or a substantially circular steel plate at the distal end portion 70b of the injection tube 70 Is provided, the side surface of the injection pipe 70 and the steel pipe inner side surface 21b are separated from each other. The injection pipe 70 is spaced from the inner surface 21b of the steel pipe at a predetermined interval from the first end 2a to the second end 2b of the steel pipe main body 2, and is connected to the second end 2b of the steel pipe main body 2 at the tip of the injection pipe 70. 70b is provided to reach.

  Next, in the filling step, as shown in FIG. 9, the distal end portion of the injection tube 70 in which the filler 6 supplied from the base end portion 70 a of the injection tube 70 reaches the second end portion 2 b of the steel pipe body 2. It is made to discharge to the hole 80 from 70b. At this time, the filler 6 is discharged from the distal end portion 70b of the injection tube 70, so that the filler 6 is injected into the other end side 80b of the hole 80, and the hole 80 extends from the other end side 80b of the hole 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 body 2, from the other end side 80b of the hole 80 to the one end side 80a, as shown in FIG. The filler 6 passes through the gap 82 of the hole 80 and the pipe interior 22 of the steel pipe body 2. At this time, since the through-hole 20 is formed in the steel pipe side surface 21 in the steel pipe main body 2, the filler 6 passes through the through-hole 20.

  In the filling step, as shown in FIG. 11A, the filler 6 passes through the through hole 20 from the gap portion 82 of the hole 80 toward the pipe interior 22 of the steel pipe body 2, or FIG. ), The filler 6 passes through the through hole 20 from the pipe interior 22 of the steel pipe body 2 toward the gap 82 of the hole 80.

  In the removal process, as shown in FIG. 12, after filling the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2 with the filler 6, the injection is performed from the other end side 80b of the hole 80 to the one end side 80a. Pull tube 70 up. At this time, the injection pipe 70 discharges the filler 6 from the tip end portion 70b of the injection pipe 70 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. 13, the reinforcing structure 7 for a concrete structure to which the present invention is applied has the steel pipe main body 2 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 filled filler 6 is hardened and penetrates the discontinuous surface 85 of the concrete structure.

  At this time, the reinforcing structure 7 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. 14, the concrete structure such as the pier 8 divides the concrete upper portion 83 and the concrete lower portion 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 7 of a concrete structure to which the present invention is applied has a tensile force P or compressive force in the pipe axis direction Y on 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 reinforcing structure 7 of the concrete structure to which the present invention is applied, since the filler 6 is filled in the pipe interior 22 of the steel pipe body 2, the steel pipe body 2 resists the tensile force P in the pipe axis direction Y. The hardened filler 6 resists the compressive force C in the tube axis direction Y.

  In the reinforcing structure 7 of the concrete structure to which the present invention is applied, the hardened filler 6 resists the compressive force C in the tube axis direction Y, so that 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 7 of the concrete structure to which the present invention is applied is such that the concrete upper portion 83 is displaced so as to tilt alternately in the lateral direction, so that the tensile force P and the compressive force C in the pipe axis direction Y are changed to 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.

  Thereby, the reinforcing structure 7 of the concrete structure 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 7 of the concrete structure to which the present invention is applied resists the tensile force P acting in the tube axis direction Y of the steel pipe body 2, so that the present invention is as shown in FIG. The steel pipe main body 2 according to the applied reinforced steel pipe 1 has a predetermined steel pipe cross-sectional area only in the cross-sectional portion of the tubular body forming the steel pipe side surface 21 except for the cross-sectional defect portion due to the through-hole 20 being formed. Is required. Moreover, since the conventional PC steel rod 9 also resists the same level of tensile force P, as shown in FIG. 15 (b), it is almost the same as the cross-sectional portion of the tubular body forming the steel pipe side surface 21 of the steel pipe body 2. It is necessary to have a cross-sectional area of

  As shown in FIG. 15, the reinforcing structure 7 for a concrete structure to which the present invention is applied has a pipe interior 22 formed in the steel pipe main body 2, so that the cross-sectional portion of the pipe forming the steel pipe side surface 21 of the steel pipe main body 2 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 used as a conventional PC steel bar while the cross-sectional area of the steel pipe and the steel bar cross-sectional area of the conventional PC steel bar 9 are approximately the same. 9 and the steel rod contact surface 90 between the hardened filler 6 can be made larger.

  Thereby, in the reinforcing structure 7 of a concrete structure to which the present invention is applied, as shown in FIGS. 14 and 15, the shearing force S in the lateral direction from the concrete upper portion 83 acts on the steel pipe body 2, 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 7 of the 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.

  In the reinforcing structure 7 of a concrete structure to which the present invention is applied, after filling the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2 with the filler 6, as shown in FIG. Since the pipe 70 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 can be prevented from being divided in the pipe axis orthogonal direction X by the injection pipe 70. As a result, the reinforcing structure 7 for a concrete structure to which the present invention is applied assumes that the filler 6 hardened in the pipe interior 22 of the steel pipe body 2 is not divided by the injection pipe 70 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.

  As shown in FIG. 8, the reinforcing structure 7 of the concrete structure to which the present invention is applied has a steel pipe body 2 with a substantially hollow cross section. The rigidity is remarkably improved. Thereby, the reinforcement structure 7 of the concrete structure to which the present invention is applied is installed with the steel pipe main body 2 having high member rigidity standing upright from the other end side 80b to the one end side 80a of the hole 80, and in the hole 80. It becomes possible to accurately align the steel pipe main body 2.

  The concrete structure reinforcing structure 7 to which the present invention is applied is because the injection pipe 70 is inserted into the steel pipe main body 2 having a substantially hollow cross section, and the injection pipe 70 is separated from the inner side surface 21b of the steel pipe at a predetermined interval. When filling the hole 80 with the filler 6, the injection pipe 70 and the steel pipe body 2 can be prevented from interfering with each other. Accordingly, the concrete structure reinforcement structure 7 to which the present invention is applied assumes that the injection pipe 70 and the steel pipe main body 2 do not interfere with each other at the hole 80, and the injection pipe 70 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.

  As shown in FIG. 10, the reinforcing structure 7 for a concrete structure to which the present invention is applied is because the injection pipe 70 is separated from the inner surface 21 b of the steel pipe at a predetermined interval. When filling, the filler 6 can be cured while being in direct contact with the inner surface 21b of the steel pipe. Thereby, the reinforcing structure 7 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 axis direction of the steel pipe main body 2 is reached. 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.

  In particular, the reinforcing structure 7 of a concrete structure to which the present invention is applied has a steel pipe body 2 having one or a plurality of indentations 3 so that the filler 6 in which the indentations 3 are hardened is in the direction orthogonal to the tube axis X. It is formed in an uneven shape. Thereby, the reinforcing structure 7 of the concrete structure to which the present invention is applied is such that the filler 6 hardened in the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe body 2 is uneven on the side surface 21 of the steel pipe body 2. , The integrity of the steel pipe body 2 and the hardened filler 6 can be improved, and adhesion between the steel pipe body 2 and the filler 6 can be made sufficient.

  In the reinforcing structure 7 for a concrete structure to which the present invention is applied, the gap 6 of the hole 80 and the pipe interior 22 of the steel pipe main body 2 are filled with the filler 6 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.

  As shown in FIGS. 10 and 11, the reinforced steel pipe 1 to which the present invention is applied has the through hole 20 formed in the steel pipe side surface 21 of the steel pipe main body 2, so that the gap portion 82 of the hole 80 and the pipe of the steel pipe main body 2 are formed. The filler 6 can be filled into the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe body 2 while allowing the filler 6 to pass through the through hole 20 between the inside 22. Thereby, the reinforced steel pipe 1 to which the present invention is applied is formed between the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2 in a section between the other end 80b and the one end 80a of the hole 80. The filler 6 passes through the through-holes 20 and is alternately interchanged, and the filler 80 is filled into the hole 80 from the other end side 80b of the hole 80 without a gap. Thus, it is possible to greatly improve the filling property of the filler 6.

  The reinforced steel pipe 1 to which the present invention is applied, in the case where the through-hole 20 is formed in the recess 3, when the recess 3 is formed on the side surface 21 of the steel pipe by hot working using a roller, the center of the roller, etc. By providing a projection having a cutting blade on the side surface, the recess 3 is formed on the side surface 21 of the steel pipe, and at the same time, the through hole 20 is formed in the recess 3 to efficiently form the through hole 20. It becomes possible.

  In particular, in the reinforced steel pipe 1 to which the present invention is applied, as shown in FIGS. 5 and 10, the cross-sectional area of the pipe interior 22 in the direction orthogonal to the pipe axis X is the same as that of the straight pipe portion 4. In comparison, it becomes narrower. At this time, the reinforced steel pipe 1 to which the present invention is applied is configured so that the internal pressure of the filler 6 that passes through the portion where the hollow part 3 is formed in the pipe axial direction Y is applied to the straight pipe part 4 in the pipe inside 22 of the steel pipe body 2. The filler 6 can be vigorously passed from the through hole 20 formed in the recess 3 toward the gap 82 of the hole 80 as being larger than the internal pressure of the filler 6 passing therethrough. Thereby, the reinforced steel pipe 1 to which the present invention is applied allows the filler 6 to pass through the through-hole 20 vigorously and allows the filler 6 to be smoothly accommodated.

  The reinforced steel pipe 1 to which the present invention is applied has a through-hole 20 in one or less locations in the pipe circumferential direction W of the steel pipe body 2 in each steel pipe cross section in the pipe axis direction Y of the steel pipe body 2. Compared with the case where the through holes 20 are formed at a plurality of locations in the direction W, it is possible to suppress an increase in cross-sectional defects in the cross section of the steel pipe. Thereby, the reinforced steel pipe 1 to which the present invention is applied can suppress an increase in the cross-sectional defect in the cross section of the steel pipe and can prevent a decrease in the tensile strength, compression strength, and the like of the steel pipe body 2.

  Since the reinforced steel pipe 1 to which the present invention is applied is formed so that the diameter d or the short diameter d1 of the through hole 20 is 5 mm or more and 25 mm or less, the aggregate or the like contained in the filler 6 is replaced with the through hole 20. Therefore, it is possible to smoothly carry out the filling of the filler 6 as a material that can be easily passed. In particular, the reinforced steel pipe 1 to which the present invention is applied has a short diameter d1 of 5 mm or more and 25 mm or less, and the through hole 20 is formed in a substantially elliptical shape, whereby each steel pipe cross section in the pipe axis direction Y of the steel pipe body 2 is formed. In this example, it is assumed that the aggregate or the like easily passes through the vertically formed through-hole 20 while suppressing an increase in the cross-sectional defect of the side surface 21 of the steel pipe, so that the filler 6 containing the aggregate or the like can be accommodated very smoothly. It becomes possible to carry out.

  As shown in FIG. 6, the reinforced steel pipe 1 to which the present invention is applied has a through-hole 20 formed so as to include a part or all of the deepest part 3 a of the recessed part 3, and thereby the side surface of the steel pipe by pressing or the like. The deepest portion 3a in which the plastic deformation 21 is maximum is removed by cutting or the like when the through hole 20 is formed. As a result, the reinforced steel pipe 1 to which the present invention is applied is reliable by removing the deepest portion 3a where the plastic deformation of the side surface 21 of the steel pipe is maximized, thereby removing the portion where the strength becomes unstable due to the plastic deformation. It is possible to provide a steel pipe body 2 having a high height.

  As shown in FIG. 4, the reinforced steel pipe 1 to which the present invention is applied has a recess 3 formed in a concave shape from the steel pipe outer surface 21 a toward the inside in the pipe axis orthogonal direction X of the steel pipe body 2. It is formed in a convex shape from the side surface 21b. At this time, in the reinforced steel pipe 1 to which the present invention is applied, the filler 6 is cured along the shape of the recess 3 as shown in FIG. An uneven body 60 of the pair of fillers 6 having an uneven shape is formed, and the recess 3 is sandwiched between the pair of uneven bodies 60. Further, the reinforced steel pipe 1 to which the present invention is applied includes a filler 6 hardened in the gap portion 82 of the hole 80 and a filler 6 hardened in the pipe interior 22 of the steel pipe main body 2 as shown in FIG. Are connected to each other with the filler 6 cured in the through hole 20 interposed therebetween, and the locking body 61 of the filler 6 is formed to be inserted through the through hole 20.

  Accordingly, in the reinforced steel pipe 1 to which the present invention is applied, as shown in FIG. 16, the recess 3 is sandwiched between the concave and convex bodies 60 of the pair of fillers 6, and the engaging body 61 of the filler 6 penetrates. By being inserted into the hole 20, the integrity of the steel pipe body 2 and the hardened filler 6 can be improved, and the adhesion between the steel pipe body 2 and the filler 6 can be remarkably improved.

  In addition, the reinforced steel pipe 1 to which the present invention is applied may be configured such that a plurality of steel pipe main bodies 2 are connected in the pipe axis direction Y when the extension of the hole 80 of the concrete structure becomes long.

  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 7 to which the present invention is applied can be introduced into a new concrete structure. Further, the concrete structure reinforcing structure 7 to which the present invention is applied can be introduced into a newly-installed or existing concrete structure as a reinforcement of a reinforced concrete structure in which reinforcing bars and the like are disposed.

DESCRIPTION OF SYMBOLS 1: Reinforced steel pipe 2: Steel pipe main body 2a: 1st end part 2b: 2nd end part 20: Through-hole 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: Depression Part 3a: Deepest part 4: Straight pipe part 6: Filler 60: Uneven body 61: Locking body 7: Reinforcement structure 70 of concrete structure: Injection pipe 70a: Base end part 70b: Tip part 8: Pier 8a: Outer surface 8b: inside 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 (6)

A reinforced steel pipe provided to reinforce a concrete structure,
A steel pipe body formed in a hollow shape to be inserted into a hole of a concrete structure,
The steel pipe main body is characterized in that one or a plurality of through-holes through which the filler passes when a hole in a concrete structure is filled with the filler are formed through the side surface of the steel pipe. Reinforced steel pipe. 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 in the direction perpendicular to the pipe axis of the steel pipe main body, and the through holes are formed in the indentations. The reinforced steel pipe according to claim 1. The indented portion is formed in a deepest and concave shape deeper than the outer surface of the steel pipe toward the inside in the direction perpendicular to the pipe axis of the steel pipe body,
The reinforced steel pipe according to claim 2, wherein the through hole is formed so as to include a part or all of the deepest portion. The said through-hole is each steel pipe cross section of the pipe-axis direction of the said steel pipe main body, and is formed in one place or less of the pipe circumferential direction of the said steel pipe main body. Reinforced steel pipe. The through hole is formed in a substantially circular shape having a diameter in the pipe circumferential direction of the steel pipe body, or a substantially elliptical shape having a short diameter in the pipe circumferential direction of the steel pipe body, and the diameter or the short diameter is It forms so that it may become 5 mm or more and 25 mm or less. The reinforced steel pipe in any one of Claims 1-4 characterized by the above-mentioned. A reinforcing structure of a concrete structure introduced to reinforce a concrete structure,
A steel pipe body formed in a hollow shape to be inserted into the hole of the concrete structure, and a filler filled in the hole of the concrete structure,
The steel pipe main body is formed with one or a plurality of through holes through which the filler passes when the filler is filled in a hole of a concrete structure. Reinforced structure of concrete structures.

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