JP6515325B2 - Reinforcement structure of reinforced steel pipe and concrete structure - Google Patents

Description

  The present invention relates to a reinforced steel pipe provided to reinforce a concrete structure, and a reinforced 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 the concrete structure, the present invention is applied to a new joint concrete structure formed by being concreted by being divided into a plurality of times. A concrete structure disclosed in Patent Document 1 has been proposed.

  The concrete structure disclosed in Patent Document 1 includes a hole provided so as to penetrate the joint surface of the joint concrete structure from the outer surface of the joint joint concrete structure to be newly formed, and the perforation surface. It is provided with reinforcement bodies, such as PC steel materials, a steel pipe, etc. which were installed in a hole, and the filler with which the hole in which the reinforcement body was installed was filled.

JP, 2011-80240, A

  However, in the concrete structure disclosed in Patent Document 1, when PC steel having a low rigidity is used as a reinforcing body, PC steel is curved or the like in the hole, so the PC steel 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 pipe is used to fill the filler in the hole, and the injection pipe and the PC steel material Interferes in the hole, which may hinder the filling operation of the filler into the hole.

  Further, in the concrete structure disclosed in Patent Document 1, even when 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. Since it was formed, there existed a possibility that it might become a thing in which the hardened | cured filler and steel pipe do not adhere sufficiently in a hole. In the concrete structure disclosed in Patent Document 1, even when the injection pipe is inserted into the hole and the filling material is injected from the lower end in 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 becomes insufficient may be formed at the middle portion or the upper end portion in 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 install a steel pipe main body at a predetermined position of a hole of a concrete structure and An object of the present invention is to provide a reinforced structure of reinforced steel pipe and a concrete structure, in which adhesion between a main body and a filler is sufficient and the filling property of the filler is significantly improved.

The reinforced steel pipe according to the first aspect of the present invention is a reinforced steel pipe provided for reinforcing a concrete structure, comprising a hollow steel pipe main body inserted into the hole of the concrete structure, the steel pipe main body being One or more through holes through which the filler passes when filling the pores of the concrete structure are formed by penetrating the side surface of the steel pipe, and the steel pipe main body is the steel pipe main body Toward the inside in the direction perpendicular to the tube axis, having one or a plurality of depressions formed in a concave shape from the outer surface of the steel pipe, the through hole is formed in the depressions, and the depressions A deepest portion is formed in a concave shape deepest than the outer surface of the steel pipe toward the inside in the direction orthogonal to the tube axis, and the through hole is formed so as to include the entire deepest portion .

In the reinforced steel pipe according to a second aspect of the present invention , in the first aspect , the through hole is formed at one or less location in the pipe circumferential direction of the steel pipe main body in each steel pipe cross section in the pipe axial direction of the steel pipe main body. It features.

In the reinforced steel pipe according to the third aspect of the present invention , in the first aspect or the second aspect of the present invention , the through hole has a substantially circular shape whose diameter is in the pipe circumferential direction of the steel pipe body, or the pipe circumferential direction of the steel pipe body It is characterized in that it is formed in a substantially elliptical shape in which the minor diameter is a minor diameter, and the diameter or the minor diameter is 5 mm or more and 25 mm or less.

A reinforcing structure of a concrete structure according to a fourth aspect of the present invention is a reinforcing structure of a concrete structure to be introduced for reinforcing a concrete structure, comprising: a concrete structure having a hole; and a hole of the concrete structure comprising a steel body formed in a hollow shape to be inserted, and a filler is filled in the hole of the concrete structure in the steel body, filling the filling material into the hole of the concrete structure At the same time, one or more through holes through which the filler passes are formed by penetrating the side of the steel pipe, and the steel pipe main body is directed to the inside of the steel pipe main body in the direction perpendicular to the pipe axis. It has one or a plurality of depressions formed in a concave shape from the side, the through hole is formed in the depressions, and the depressions are directed to the inside of the steel pipe main body in the direction orthogonal to the pipe axis, More than most Ku is deepest recessed, the through hole is characterized by being formed so as to include all of the deepest portion.
The reinforced structure of a concrete structure according to the fifth invention is characterized in that, in the fourth invention , the hole portion of the concrete structure penetrates the discontinuous surface of the concrete structure where the concrete is not integrated. Do.

According to the first to third inventions , since the through hole is formed on the side surface of the steel pipe main body, the gap between the hole and the steel pipe main body in the section between the other end side and the one end side of the hole Between the inside of the tube and the inside of the tube, the filling material alternately passes through the through hole, and the filling property of the filling material in the hole can be significantly improved.

According to the first to third inventions , the filler hardened in the gap between the holes and the filler hardened in the pipe of the steel pipe main body are connected via the filler hardened in the through hole. In this state, the locking member of the filler is formed so as to pass through the through hole, thereby improving the integrity of the steel pipe main body and the hardened filler, and the adhesion between the steel pipe main body and the filler is remarkable. It is possible to improve.

In particular, according to the first aspect of the present invention , since the filler is cured along the shape of the recessed portion, the concavo-convex body of a pair of fillers is formed in a concavo-convex shape in the direction perpendicular to the tube axis of the steel pipe main body. By being sandwiched between the pair of concavo-convex members, it is possible to improve the integrity of the steel pipe body and the hardened filler, and to remarkably improve the adhesion between the steel pipe body and the filler.

Further, according to the first invention, a through hole so as to encompass all parts of the deepest portion of the recess is formed, that the plastic deformation of the steel pipe sides deepest portion having the maximum is removed, by plastic deformation It becomes possible to remove the location where strength became unstable and to provide a highly reliable steel pipe main body.

In particular, according to the second invention , in each steel pipe cross section in the pipe axial direction of the steel pipe main body, through holes are formed at one or less locations in the pipe circumferential direction of the steel pipe main body. As compared with the case where the hole is formed, the increase in the cross-sectional fracture in the cross section of the steel pipe can be suppressed, so that it is possible to prevent the decrease in the tensile resistance, the compression resistance and the like of the steel pipe main body.

In particular, according to the third aspect of the present invention , since the diameter or the minor diameter of the through hole is formed to be 5 mm or more and 25 mm or less, aggregates and the like contained in the filler are easily passed through the through hole. As a result, it is possible to smoothly implement the filling material. In particular, by forming through holes in a substantially elliptical shape, in each steel pipe cross section in the pipe axis direction of the steel pipe main body, while suppressing an increase in cross section loss of the steel pipe side surface, the vertically formed through holes are made of aggregate It becomes possible to carry out the interchange of the filler containing the aggregate etc. very smoothly as the one etc. passes easily.

According to the fourth aspect of the invention , the steel pipe main body is formed in a substantially hollow shape in cross section, so that the rigidity of the member is significantly improved as compared with the conventional rebar, PC steel rod, etc. Since the steel pipe main body having high rigidity of the member can be erected and installed up to one end side, it is possible to accurately position the steel pipe main body in the hole. Further, the injection pipe is inserted into the steel pipe main body formed into a hollow shape in cross section, and the injection pipe and the steel pipe main body are installed at predetermined positions of the hole without interference between the injection pipe and the steel pipe main body. It is possible to smoothly carry out the filling operation of the filler in the hole.

According to the fourth aspect of the invention , since the through hole is formed on the side surface of the steel pipe in the steel pipe, in the section between the other end side and the one end side of the hole, the gap between the hole and the inside of the pipe of the steel pipe In the meantime, the filler passes through the through holes and is alternately accommodated, so that it is possible to fill the holes without gaps with the filler so that the fillers can be densely filled in the holes. Furthermore, since the filler is cured along the shape of the recess, a pair of filler projections and recesses which are in the form of projections and recesses in the direction perpendicular to the tube axis of the steel pipe main body is formed, and the recess is sandwiched between the pair of recesses and projections Thus, the integrity of the steel pipe body and the hardened filler can be improved, and the adhesion between the steel pipe body and the filler can be remarkably improved. Furthermore, a through hole is formed so as to cover all of the deepest part of the depressed part, and the deepest part where plastic deformation of the side of the steel pipe is maximized is removed, so that the strength becomes unstable due to plastic deformation. Is removed to obtain a highly reliable steel pipe body.
According to the fifth aspect of the present invention , the upper portion of the concrete structure tends to tilt, and the filler material fills the inside of the steel pipe body even if tensile force or compressive force in the pipe axial direction acts on the steel pipe body at the discontinuous surface. Thus, the steel pipe body resists the tensile force in the axial direction of the pipe, and the hardened filler resists the compressive force in the axial direction of the pipe.

It is a perspective view showing a concrete structure where a reinforcement structure of a concrete structure to which the present invention is applied is introduced. It is a perspective view which shows the reinforcement structure and reinforcement steel pipe of the concrete structure to which this invention is applied. It is a front view which shows the reinforced steel pipe to which this invention is applied, and the hole of a concrete structure. (A) is an enlarged front view which shows the reinforced steel pipe to which this invention is applied, (b) is the DD sectional longitudinal view. (A) is an AA line transverse cross-sectional view of a reinforced steel pipe to which the present invention shown in FIG. 4 is applied, and (b) is a B-B line transverse sectional view thereof. It is an enlarged front view which shows the hollow part and through hole of the reinforced steel pipe to which this invention is applied. (A) is an enlarged front view showing a steel pipe main body in which a horizontally long depressed portion is formed by a reinforced steel pipe to which the present invention is applied, (b) is an enlarged front view showing a steel pipe main body of a substantially straight tubular steel pipe It is. It is a front view showing the state where injection pipes, such as a Tremy pipe, are inserted in the inside of a steel pipe main part by the reinforcement structure of the concrete structure to which the present invention is applied. It is a front view showing the state where filler is discharged from the tip part of an injection pipe by the reinforcement structure of the concrete structure to which the present 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 by the reinforcement structure of the concrete structure to which this invention is applied is filled with a hole. It is an enlarged front view which shows the state which a filler passes through a through-hole by the reinforcement structure of the concrete structure to which this invention is applied. It is a front view showing the process of removing the pouring pipe from the inside of the pipe of the steel pipe main body by the reinforcement structure of the concrete structure to which the present invention is applied. It is a front view which shows the state by which the filler was filled with the hole by the reinforcement structure of the concrete structure to which this invention is applied. It is a front view showing the state where external force applied to the concrete structure where the reinforcement structure of the concrete structure to which the present invention is applied was introduced. (A) is an expanded cross-sectional view showing a steel pipe contact surface of a steel pipe main body in a reinforced structure of a concrete structure to which the present invention is applied, (b) is an enlarged view showing a steel rod contact surface of a 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 was inserted | pinched by the uneven | corrugated body of a pair of fillers by the reinforced steel pipe to which this invention is applied, (b) is the through-hole of the steel pipe side. It is an enlarged longitudinal cross-sectional view which shows the state in which the latching body of the filler was penetrated.

  Hereinafter, a reinforcing steel pipe 1 to which the present invention is applied and an embodiment for implementing a reinforcing structure 7 of a concrete structure to which the present invention is applied will be described in detail with reference to the drawings.

  The reinforcing structure 7 of the concrete structure to which the present invention is applied is, as shown in FIG. 1, for example, a non-barbed concrete structure such as a bridge pier 8 built without reinforcing bars or the like disposed inside 8b By separately providing the reinforced steel pipe 1 to which the present invention is applied, the concrete structure is reinforced.

  The reinforced structure 7 of a concrete structure 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 introduce | transduces by providing the steel pipe main body 2 which concerns, and in particular, it is introduce | transduced in order to reinforce the existing concrete structure in which several years or more have passed since it was built. The reinforced steel pipe 1 to which the present invention is applied is provided with a plurality of steel pipe main bodies 2 at intervals of about 0.3 m to 1 m in a concrete structure.

  As shown in FIG. 2, concrete structures are constructed to be of a predetermined size by dividing concrete several times, and concrete is integrated at the boundary where concrete is continuous. A discontinuous surface 85 is formed. In addition, in the case of a concrete structure, even when concrete is cast in succession without dividing the concrete into multiple times, the occurrence of a cold joint or the like results in the formation of a discontinuous surface 85 in which the concrete is not integrated. There is also.

  By forming the discontinuous surface 85, the concrete structure becomes one in which the cast concrete is divided at the interior 8b with the discontinuous surface 85 as a boundary. The concrete structure, as shown in FIG. 3, is a hole having a cross-sectionally substantially circular shape or the like which is cored by carrying out a concrete drilling operation and the like continuously from the outer surface 8a of the bridge pier 8 etc. to the inside 8b. 80 will be formed through the discontinuous surface 85.

  The hole 80 has an extension of about 2 m to 30 m, for example, from one end 80 a disposed on the outer surface 8 a of the bridge 8 or the like to the other end 80 b disposed on the inner 8 b of the bridge 8 or the like. The hole 80 has an extension of at least about 2 m to 3 m, particularly on both sides bordering the discontinuous surface 85. The hole 80 has a hole diameter of about 15 cm to 30 cm, for example, by forming the inner side surface 81 of the hole so as to be substantially circular in cross section from the one end 80a to the other end 80b.

  The reinforced steel pipe 1 to which the present invention is applied includes a steel pipe main body 2 formed in a substantially hollow shape in cross section, which is inserted into the hole 80 of the concrete structure. The steel pipe side surface 21 is formed so that it may become a cross-sectional substantially circular shape, and the steel pipe main body 2 has an outer diameter of about 5 cm-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 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 or the like, the steel pipe side surface 21 of the steel pipe main body 2 and the hole inner surface 81 of the hole 80 separate from each other. A gap 82 is formed in the hole 80 of the The steel pipe main body 2 is, for example, a steel pipe main body 2 by attaching spacers such as a plurality of steel plates extending substantially in a plurality of directions from the steel pipe side surface 21 to the outside in the pipe axis orthogonal direction X. The side surface 21 and the hole inner surface 81 of the hole 80 can be separated. The steel pipe main body 2 is formed in a substantially hollow shape in cross section, so that the pipe interior 22 is formed inside the steel pipe side surface 21.

  As shown in FIG. 4 and FIG. 5, the steel pipe main body 2 is formed in a substantially straight tubular shape extending in the pipe axial direction Y and the recessed portion 3 formed by hot working etc. inward in the pipe axis orthogonal direction X And the straight pipe portion 4. The straight pipe portion 4 extends in the pipe axial direction Y by the steel pipe side surface 21 continuing on substantially the same plane in the pipe axial direction Y without making the steel pipe side surface 21 uneven in the pipe axis orthogonal direction X of the steel pipe main body 2. It is formed in a substantially straight tubular shape.

  The recess 3 is formed one or more in the axial direction Y and the circumferential direction W of the steel pipe main body 2. At this time, the plurality of recessed portions 3 formed at predetermined intervals in the pipe circumferential direction W of the steel pipe main body 2 alternate with the pipe side 21 which is 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 pipe axial direction Y of the steel pipe main body 2 are alternately formed with the straight pipe portions 4 in the pipe axial direction Y and are not continuous in the pipe axial direction Y , Is formed intermittently in the tube axis direction Y.

  The recessed portion 3 is formed in a concave shape from the steel pipe outer side surface 21 a by curving the steel pipe side surface 21 inward in the pipe axis orthogonal direction X of the steel pipe main body 2. The depressed portion 3 is depressed in the circumferential direction W of the steel pipe body 2 by pressing the steel pipe side surface 21 inward and in the deepest direction with respect to the steel pipe outer surface 21 a toward the inside in the pipe axis orthogonal direction X of the steel pipe body 2. The deepest portion 3 a is formed substantially at the center of the portion 3.

  The hollow portion 3 is formed in a convex shape from the steel pipe inner side surface 21 b by curving the steel pipe side surface 21 toward the inside in the pipe axis orthogonal direction X of the steel pipe main body 2. The recessed portion 3 is formed in a convex shape from the inner surface 21b of the steel pipe toward the inner side in the pipe axis orthogonal direction X of the steel pipe main body 2, thereby, as shown in FIG. The cross-sectional area of the straight pipe portion 4 is narrower than that of the straight pipe portion 4.

  The steel pipe main body 2 is made to penetrate the steel pipe side surface 21 in the pipe axis orthogonal direction X as shown in FIGS. 4 to 6, and one or a plurality of through holes 20 are formed. 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 portion 4 or the like where the hollow portion 3 is not formed.

  The steel pipe main body 2 is, as shown in FIG. 5A, in each steel pipe cross section in the pipe axial direction Y of the steel pipe main body 2, a portion where the through hole 20 is formed at only one place, and FIG. As shown, the through hole 20 is formed at one or less position in the pipe circumferential direction W of the steel pipe main body 2 having a portion where the through hole 20 is not formed even at one portion. Not only this but the through-hole 20 may be formed in multiple places in each steel pipe cross section of the pipe axial direction Y of the steel pipe main body 2. FIG.

  The through hole 20 is, as shown in FIGS. 5 and 6 (a), a substantially circular shape having a diameter d of the pipe circumferential direction W of the steel pipe main body 2, or as shown in FIGS. 5 and 6 (b) The pipe circumferential direction W of the steel pipe main body 2 is formed into a substantially elliptical shape, while the minor axis d1 is used and the pipe axial direction Y of the steel pipe main body 2 is defined as the major diameter d2. At this time, the through hole 20 is formed such that the diameter d or the short diameter d1 is 5 mm or more and 25 mm or less. When the through hole 20 is formed in the recess 3, the steel pipe side surface 21 is cut around the deepest portion 3 a of the recess 3 or the like to cut part or all of the deepest portion 3 a of the recess 3. Formed to be included.

  In the steel pipe main body 2, as shown in FIG. 4, each of the depressions 3 is formed in a substantially elliptical shape or the like extending in the pipe axial direction Y of the steel pipe main body 2. The depressed portion 3 is formed longitudinally long along the axial direction Y of the steel pipe main body 2. Not only this but as shown in Drawing 7 (a), each hollow part 3 may be formed horizontally long extended to tube peripheral direction W of steel pipe main part 2, and, as shown in Drawing 7 (b) As shown in), a substantially straight tubular normal steel pipe or the like in which the steel pipe side surfaces 21 are continuously formed on substantially the same surface and extends in the pipe axial direction Y may be used.

  The reinforcing structure 7 of the concrete structure to which the present invention is applied is, as shown in FIG. 2, a steel pipe main 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. And The filler 6 is made of a time-hardening material such as cement-based material such as mortar or concrete, or a time-hardenable material such as urethane-based material, and the gap 82 of the hole 80 and the inside 22 of the steel pipe main body 2 After being filled, it hardens after a predetermined time has passed.

  The reinforcing structure 7 of the concrete structure to which the present invention is applied is, as shown in FIGS. 8 to 13, installing the steel pipe main body 2 in the hole 80 of the concrete structure such as the bridge pier 8 etc. Through the filling step of filling the filling material 6 in the hole 80 and the removal step of pulling out and removing the injection pipe 70, it is introduced to reinforce the concrete structure.

  In the filling step, first, as shown in FIG. 8, the steel pipe main 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 concrete structure such as the bridge 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 main body 2. At this time, in the filling step, for example, spacers such as a plurality of steel plates extending in the pipe axis orthogonal direction X from the side surface of the injection tube 70 or the steel pipe inner side 21b, or a substantially circular steel plate at the tip 70b of the injection tube 70 As a result, the side surface of the injection pipe 70 and the inner surface 21b of the steel pipe are separated. The injection pipe 70 is spaced from the steel pipe inner side surface 21b from the first end 2a to the second end 2b of the steel pipe main body 2 at a predetermined interval, It is provided to reach 70b.

  In the filling step, next, as shown in FIG. 9, the tip end portion of the injection pipe 70 which has made the filler 6 supplied from the proximal end portion 70a of the injection pipe 70 reach the second end portion 2b of the steel pipe main body 2 It discharges 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 and injected into the other end 80b of the hole 80, and the hole 80 extends from the other end 80b to the one end 80a. The space 82 of the portion 80 and the inside 22 of the steel pipe body 2 are filled.

  In the filling step, when filling the filling material 6 in the gap 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2, as shown in FIG. 10, from the other end 80b to the one end 80a of the hole 80, The filling material 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 of the steel pipe main body 2, the filler 6 passes through the through hole 20.

  In the filling step, as shown in FIG. 11 (a), the filler 6 passes through the through hole 20 from the gap 82 of the hole 80 toward the pipe interior 22 of the steel pipe main body 2, or FIG. As shown in), the filling material 6 passes through the through hole 20 from the inside 22 of the pipe of the steel pipe main body 2 to the gap 82 of the hole 80.

  In the removal step, as shown in FIG. 12, after the gap 82 of the hole 80 and the tube interior 22 of the steel pipe main body 2 are filled with the filling material 6, injection is performed from the other end 80b to the one end 80a of the hole 80. Pull up the tube 70. At this time, the filling pipe 70 discharges the filling material 6 from the tip end 70 b of the filling pipe 70 to the inside 22 of the steel pipe main body 2 while the filling pipe 70 is pulled out from the second end 2 b to the first end 2 a of the steel pipe main body 2 It becomes a thing.

  Finally, as shown in FIG. 13, the reinforcing structure 7 of the concrete structure to which the present invention is applied is in the hole 80 with the steel pipe main body 2 installed in the hole 80 of the concrete structure such as the bridge pier 8 or the like. The filled filler 6 is hardened to penetrate the discontinuous surface 85 of the concrete structure, and the steel pipe body 2 and the hardened filler 6 are provided in the hole 80.

  At this time, in the reinforcing structure 7 of the concrete structure to which the present invention is applied, the steel pipe main body 2 in which the filler 6 is filled and hardened in the pipe interior 22 is bounded by the discontinuous surface 85 of the concrete structure such as the bridge pier 8 or the like. , And the concrete upper part 83 and the concrete lower part 84.

  As shown in FIG. 14, in the concrete structure such as the bridge pier 8 etc., the external force F acts in the lateral direction due to an earthquake or the like to divide the concrete upper portion 83 and the concrete lower portion 84 with the discontinuous surface 85 as a boundary. The concrete upper portion 83 is to be displaced so as to tilt in the lateral direction. The concrete structure such as the bridge pier 8 tends to be displaced so that the upper part 83 of the concrete alternately tilts in the lateral direction, since the external force F in the lateral direction acts alternately from the left and right sides.

  The reinforcing structure 7 of the concrete structure to which the present invention is applied is a tensile force P or a compressive force in the axial direction Y applied to the steel pipe body 2 at the discontinuous surface 85 of the concrete structure when the concrete upper portion 83 is inclined. C will work. At this time, since the reinforcing material 7 of the concrete structure to which the present invention is applied is filled with the filler 6 in the pipe interior 22 of the steel pipe main body 2, the steel pipe main body 2 resists the tensile force P in the pipe axial direction Y. The hardened filler 6 resists the compressive force C in the axial direction Y.

  In the reinforcing structure 7 of the concrete structure to which the present invention is applied, since the filler 6 hardened against the compressive force C in the axial direction Y acts against the compressive force C in the axial direction Y, the steel tube main body 2 It is possible to prevent the buckling deformation of the steel pipe main body 2 as not to be burdened. Furthermore, in the reinforcing structure 7 of the concrete structure to which the present invention is applied, the tensile force P in the axial direction Y and the compressive force C in the pipe axial direction Y are displaced by the concrete upper portion 83 being displaced alternately in the lateral direction. Although alternately acting on 2, the filler material 6 is hardened in the pipe interior 22 of the steel pipe body 2, so the steel pipe side face 21 is restrained by the hardened filler material 6 to prevent the buckling deformation of the steel pipe body 2 It becomes possible.

  Thereby, the reinforced structure 7 of the concrete structure to which the present invention is applied is provided so that the steel pipe main body 2 in which the filler 6 is filled and hardened in the pipe interior 22 is bridged between the concrete upper portion 83 and the concrete lower portion 84 Thus, the concrete upper portion 83 is inclined in the lateral direction as the steel pipe main body 2 and the hardened filler 6 sufficiently resist the tensile force P or the compression force C acting in the pipe axial direction Y of the steel pipe main body 2. It is possible to reinforce the concrete structure such as the bridge pier 8 so as not to collapse.

  Further, in the concrete structure such as the bridge pier 8 and the like, the external force F in the lateral direction acts due to an earthquake or the like to divide the upper concrete portion 83 and the lower concrete portion 84 with the discontinuous surface 85 as a boundary. The shear force S in the lateral direction acts on the steel pipe body 2.

  Here, in order to resist the tensile force P which acts on the pipe axial direction Y of the steel pipe main body 2, the reinforcing structure 7 of the concrete structure to which the present invention is applied, 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 at the cross-sectional part of the tube forming the steel pipe side surface 21 except for the cross-sectional loss part due to the through hole 20 being formed. Is required. Also, as shown in FIG. 15 (b), the conventional PC steel rod 9 also has the same degree of cross section of the pipe forming the steel pipe side surface 21 of the steel pipe main body 2 to resist the same tensile force P. It is necessary to have a steel rod cross-sectional area of

  In the reinforcing structure 7 of the concrete structure to which the present invention is applied, as shown in FIG. 15, since the pipe interior 22 is formed in the steel pipe main body 2, the cross section of the pipe forming the steel pipe side 21 of the steel pipe main body 2 The steel pipe contact surface 23 of the steel pipe side surface 21 of the steel pipe main body 2 and the hardened filling material 6 is made the conventional PC steel bar while making the steel pipe cross sectional area and the steel bar cross sectional area of the conventional PC steel bar 9 comparable. It can be made larger than the steel rod contact surface 90 between 9 and hardened filler 6.

  Thereby, as shown in FIG. 14 and FIG. 15, the reinforcing structure 7 of the concrete structure to which the present invention is applied, the shear force S in the lateral direction from the concrete upper portion 83 acts on the steel pipe main body 2. Even when the steel pipe side surface 21 and the hardened filler 6 are in 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 largely secured, thereby resisting the shear force S and the steel pipe side surface 21. The bearing pressure acting on the hardened filler 6 is relieved, and it becomes possible to prevent the hardened filler 6 from being broken or broken. Furthermore, in the reinforcing structure 7 of the concrete structure to which the present invention is applied, the filler 6 hardened in the pipe interior 22 of the steel pipe main body 2 restrains the steel pipe side surface 21, so the resistance against the shear force S is ensured to the steel pipe side 21. Can be used to

  The reinforcing structure 7 of the concrete structure to which the present invention is applied, as shown in FIG. 12, after filling the filler 6 in the gap 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2, Since the pipe 70 is removed from the pipe interior 22 of the steel pipe main body 2, the filler 6 hardened in the pipe interior 22 of the steel pipe main body 2 can not be divided in the pipe axis orthogonal direction X by the injection pipe 70. 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 pipe interior 22 of the steel pipe main body 2 is not divided by the injection pipe 70, the filler in the pipe interior 22 of the steel pipe main body 2 By integrally curing 6, it is possible to significantly improve the resistance of the cured filler 6 to the transverse shear force S and the like.

  The reinforcing structure 7 of the concrete structure to which the present invention is applied, as shown in FIG. 8, has the steel pipe main body 2 formed in a substantially hollow shape in cross section. The rigidity is significantly improved. Thereby, the reinforcing 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 80b of the hole 80 to the one end 80a. It becomes possible to carry out position alignment of the steel pipe main body 2 correctly.

  In the reinforcing structure 7 of the concrete structure to which the present invention is applied, the injection pipe 70 is inserted into the steel pipe main body 2 formed into a hollow shape in cross section, and the injection pipe 70 is separated from the steel pipe inner side surface 21b at a predetermined distance. When filling the filling material 6 in the hole 80, the injection pipe 70 and the steel pipe main body 2 can be made not to interfere with each other. As a result, the reinforcing structure 7 of the concrete structure to which the present invention is applied is configured such that the injection pipe 70 and the steel pipe main body 2 do not interfere with each other in the hole 80. As a result, the filling operation of the filler 6 into the hole 80 can be smoothly performed.

  In the reinforcing structure 7 of the concrete structure to which the present invention is applied, as shown in FIG. 10, the filling pipe 70 is separated from the inner surface 21b of the steel pipe at a predetermined distance. At the time of filling, the filler 6 can be cured while being in direct contact with the inner surface 21 b of the steel pipe. Thereby, the reinforcing structure 7 of the concrete structure to which the present invention is applied firmly integrates the filler 6 hardened in the pipe interior 22 of the steel pipe main body 2 and the steel pipe main body 2, and the pipe axial direction of the steel pipe main body 2 It is possible to significantly improve the resistance of the steel pipe body 2 and the hardened filling material 6 to the tensile force P or compressive force C of Y.

  In particular, in the reinforcing structure 7 of the concrete structure to which the present invention is applied, the steel pipe main body 2 has one or a plurality of depressions 3 so that the filling material 6 in which the depressions 3 are hardened It is formed in an uneven shape. Thereby, in the reinforcing structure 7 of the concrete structure to which the present invention is applied, the filler 6 hardened in the gap portion 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2 is uneven on the steel pipe side surface 21 of the steel pipe main body 2 As a result, the integrity of the steel pipe main body 2 and the hardened filler 6 can be improved, and adhesion between the steel pipe main body 2 and the filler 6 can be made sufficient.

  In the reinforcing structure 7 of the concrete structure to which the present invention is applied, the filler material 6 is filled in the gap 82 of the hole 80 and the pipe interior 22 of the steel pipe main body 2 from the other end 80b to the one end 80a of the hole 80 Therefore, the filler 6 can be filled in the hole 80 without gaps by using the weight of the filler 6 in order from the other end 80 b to the one end 80 a of the hole 80.

  In the reinforced steel pipe 1 to which the present invention is applied, as shown in FIGS. 10 and 11, since the through holes 20 are formed in the steel pipe side surface 21 of the steel pipe main body 2, the gap 82 of the hole 80 and the pipe of the steel pipe main body 2 The filler 6 can be filled into the gap 82 of the hole 80 and the tube interior 22 of the steel pipe main body 2 while passing the filler 6 to the through hole 20 between the interior 22 and the inside 22. Thereby, the reinforced steel pipe 1 to which the present invention is applied has the gap 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 material 6 passes alternately through the through holes 20, and the filler material 6 is filled in the hole 80 without gaps from the other end 80b of the hole 80, and the hole 80 is formed. It is possible to significantly improve the filling property of the filler 6 in the above.

  The reinforced steel pipe 1 to which the present invention is applied, when the through hole 20 is formed in the hollow portion 3, when the hollow portion 3 is formed in the steel pipe side surface 21 by hot working using a roller By forming the hollow portion 3 on the side surface 21 of the steel pipe by forming a projection or the like having a cutting blade on the same time, forming the through hole 20 in the hollow portion 3 and efficiently forming the through hole 20 It becomes possible.

  In particular, as shown in FIGS. 5 and 10, in the reinforced steel pipe 1 to which the present invention is applied, the cross-sectional area in the pipe axis orthogonal direction X of the pipe interior 22 is straight pipe 4 at the location where the recess 3 is formed. It becomes narrow by comparison. At this time, the reinforced steel pipe 1 to which the present invention is applied is the inner pipe 22 of the steel pipe main body 2 and the inner pipe 22 of the filler 6 passing through the portion where the recess 3 is formed in the pipe axial direction Y. The filler 6 can be forcefully 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 through. As a result, in the reinforced steel pipe 1 to which the present invention is applied, the filler 6 can be vigorously passed through the through holes 20, and the filler 6 can be smoothly carried out.

  In the reinforced steel pipe 1 to which the present invention is applied, the through hole 20 is formed at one or less location in the pipe circumferential direction W of the steel pipe main body 2 in each steel pipe cross section in the pipe axial direction Y of the steel pipe main body Compared to 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 steel pipe cross section. As a result, the reinforced steel pipe 1 to which the present invention is applied can suppress an increase in cross-sectional fracture in the cross section of the steel pipe, and can prevent a decrease in the tensile resistance, the compression resistance and the like of the steel pipe main body 2.

  The reinforced steel pipe 1 to which the present invention is applied is formed such that the diameter d or the short diameter d1 of the through hole 20 is 5 mm or more and 25 mm or less. It is possible to smoothly carry out the filling material 6 as one to be easily passed. In particular, in the reinforced steel pipe 1 to which the present invention is applied, the through holes 20 are formed in a substantially elliptical shape with the minor diameter d1 of 5 mm or more and 25 mm or less, so that each steel pipe cross section in the pipe axial direction Y of the steel pipe body 2 The filler material 6 containing the aggregate and the like is extremely smooth when the aggregate and the like easily pass through the longitudinally formed through holes 20 while suppressing an increase in the cross-sectional defects of the steel pipe side surface 21. It is possible to implement

  In the reinforced steel pipe 1 to which the present invention is applied, as shown in FIG. 6, the through hole 20 is formed so as to include a part or all of the deepest portion 3a of the depressed portion 3, thereby a steel pipe side surface by pressing or the like. When forming the through hole 20, the deepest portion 3a where the plastic deformation 21 is maximized is removed by cutting or the like. Thereby, in the reinforced steel pipe 1 to which the present invention is applied, the deepest portion 3a where plastic deformation of the steel pipe side surface 21 is maximized is removed, thereby removing a portion where strength becomes unstable due to plastic deformation and reliability It is possible to provide a high-strength steel pipe body 2.

  In the reinforced steel pipe 1 to which the present invention is applied, as shown in FIG. 4, the hollow portion 3 is formed in a concave shape from the steel pipe outer surface 21a 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, as shown in FIG. 16A, the filler 6 hardens along the shape of the recessed portion 3 to make the pipe axis orthogonal direction X of the steel pipe main body 2 The concavo-convex body 60 of the pair of filling materials 6 in the concavo-convex shape is formed, and the depressed portion 3 is sandwiched between the pair of concavo-convex bodies 60. Further, as shown in FIG. 16 (b), the reinforced steel pipe 1 to which the present invention is applied is the filler 6 hardened in the gap 82 of the hole 80 and the filler 6 hardened in the pipe interior 22 of the steel pipe main body 2. In this state, the through holes 20 are connected with the cured filler 6 interposed therebetween, and the locking body 61 of the filler 6 is formed to pass through the through holes 20.

  Thereby, as shown in FIG. 16, in the reinforced steel pipe 1 to which the present invention is applied, the depressed portion 3 is sandwiched between the concavo-convex members 60 of the pair of filling materials 6, and the locking bodies 61 of the filling materials 6 further penetrate 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 the reinforced steel pipe 1 to which the present invention is applied, a plurality of steel pipe main bodies 2 can be connected in the pipe axial direction Y when the extension of the hole 80 of the concrete structure becomes long.

  As mentioned above, although the example of the embodiment of the present invention was explained in detail, any of the above-mentioned embodiments only shows the example of the embodiment in the case of carrying out the present invention. The scope should not be interpreted in a limited manner.

  For example, the reinforcing structure 7 of the concrete structure to which the present invention is applied can be introduced into a new concrete structure. Moreover, the reinforcement structure 7 of the concrete structure to which this invention is applied can also be introduce | transduced into the new or the existing concrete structure as what further reinforces the reinforced concrete structure by which a rebar etc. were arrange | positioned inside.

1: Reinforcement steel pipe 2: Steel pipe body 2 a: First end 2 b: Second end 20: Through hole 21: Steel pipe side 21 a: Steel pipe outer side 21 b: Steel pipe inner side 22: Pipe inside 23: Steel pipe contact surface 3: hollow Part 3a: deepest part 4: straight pipe part 6: filler 60: concavo-convex body 61: locking body 7: reinforcing structure of concrete structure 70: injection pipe 70a: base end 70b: tip 8: bridge 8a: outer surface 8b: Internal part 80: Hole 80a: One end side 80b: Other end side 81: Hole inner surface 82: Gap 83: Concrete upper part 84: Concrete lower part 85: Discontinuous surface W: Tube circumferential direction X: Tube axis orthogonal direction Y : Tube axis direction

Claims (5)

A reinforced steel pipe provided to reinforce a concrete structure,
A hollow steel pipe body inserted into the hole of the concrete structure;
In the steel pipe main body, one or more through holes through which the filler passes when the filler in the hole of the concrete structure is formed are formed by penetrating the side surface of the steel pipe,
The steel pipe main body has one or a plurality of depressions concavely formed 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 depressions .
The recessed portion is formed deepest in a concave shape deepest than 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,
The said through-hole is formed so that all of the said deepest part may be included . The reinforced steel pipe characterized by the above-mentioned . The reinforced steel pipe according to claim 1 , wherein the through hole is formed at one or less location in a pipe circumferential direction of the steel pipe main body in each steel pipe cross section in the pipe axial direction of the steel pipe main body. The through hole is formed in a substantially circular shape whose diameter is in the circumferential direction of the steel pipe main body, or in a substantially elliptical shape whose minor axis is in the circumferential direction of the steel pipe main body, and the diameter or the minor diameter is It forms so that it may become 5 mm or more and 25 mm or less. The reinforced steel pipe of Claim 1 or 2 characterized by the above-mentioned. The reinforcement structure of a concrete structure introduced to reinforce the concrete structure,
Comprises a concrete structure having a hole, a steel body formed in a hollow shape to be inserted into the hole of the concrete structure, and a filler is filled in the hole of the concrete structure,
The steel body, when filling the filling material into the hole of the concrete structure, one or more through holes becomes that the filling material to pass through, is formed by penetrating the steel side,
The steel pipe main body has one or a plurality of depressions concavely formed 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 depressions .
The recessed portion is formed deepest in a concave shape deepest than 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,
The reinforcing structure of a concrete structure , wherein the through hole is formed so as to include all of the deepest portion . The reinforcing structure of a concrete structure according to claim 4 , wherein the hole portion of the concrete structure penetrates a discontinuous surface of the concrete structure which is not integrated with concrete.

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