JP2019044550A - Joining structure between concrete member - Google Patents

Abstract

To provide a joining structure between concrete members capable of preventing the deterioration of proof stress at a joint part between concrete members, and making use of strong durability even if a large external force is exerted on the concrete member.SOLUTION: A joining structure 1 between concrete members for joining a first concrete member 2 and a second concrete member 3, the first concrete member 2 being penetrated by a fibrous fiber member 4, and the second concrete member 3 having an insertion hole 31 excavated from the outer surface into which a fiber member 4 is inserted and which is filled with an age-based curable material 6.SELECTED DRAWING: Figure 1

Description

  The present invention relates to a joint structure between concrete members for joining a first concrete member and a second concrete member.

  Conventionally, as a technique for joining concrete members, for example, the techniques disclosed in Patent Literatures 1 and 2 related to joining of a concrete floor slab and a concrete wall column are proposed.

  In the technology disclosed in Patent Document 1, a through hole is formed from the bottom of a reinforced concrete wall column, and a mortar is injected into the through hole after an anchor bar protruding upward from the floor plate is inserted. ing.

  Further, in the disclosed technique of Patent Document 2, an anchor bolt formed by forming a bolt insertion hole at a lower end portion of a concrete wall column made of a precast concrete member and projecting upward from a floor slab with respect to the bolt insertion hole Discloses a configuration for inserting a bolt, and a technique for filling a mortar into the bolt insertion hole.

  The techniques disclosed in Patent Documents 1 and 2 are expected to stably join a concrete wall column to a floor slab by firmly attaching a mortar to an anchor bolt or the like.

  However, according to the techniques disclosed in these Patent Documents 1 and 2, when the precast wall column is deteriorated and an external force is applied due to a collision of a vehicle, etc., the anchor bolt can be easily pulled out from the mortar attached. In some cases, Also, when such external force is applied, the mortar may be pulled out with the anchor bolt attached, and further, part of the concrete of the wall column attached to the mortar may be split together. In some cases, it may get caught. That is, there is a problem that the durability against the external force applied to the wall can not be improved only by the disclosed techniques of Patent Documents 1 and 2.

  Further, according to the disclosed techniques of Patent Documents 1 and 2, although the anchor bolt is disposed at the joint portion between the concrete members, the anchor bolt is corroded by intrusion of rain water or the like from the joint portion, As a result, there is a problem that the yield strength of the concrete member is lowered from the joint portion of the concrete members.

JP 2001-226912 A JP, 2015-71907, A

  Therefore, the present invention has been made in view of the above-mentioned problems, and the object of the present invention is a joint structure between concrete members for joining a first concrete member and a second concrete member, It is possible to prevent the reduction of the load resistance from the joint portion between the concrete members, and the joint between the concrete members which can exhibit strong durability even when a large external force is applied to the concrete members. In providing the structure.

  A joint structure between concrete members according to a first aspect of the present invention is the joint structure between concrete members for joining a first concrete member and a second concrete member, wherein the first concrete member has a fibrous fiber member protruding The second concrete member is characterized in that the fiber member is inserted into an insertion hole formed on the outer surface and is filled with a time-hardening material.

  The joint structure between concrete members according to the second invention is characterized in that, in the first invention, the second concrete member is embedded with a spiral reinforcing bar so as to surround the insertion hole.

  In the joint structure between concrete members according to the third invention, in the first invention or the second invention, the first concrete member is embedded in a part of the fiber member, and a spiral rebar around the embedded fiber member Is embedded.

  In the joint structure between concrete members according to the fourth invention, in the first invention to the third invention, the elastic member having an elastic force is projected and the first concrete member is abutted against the fiber member, the elastic A member is embedded in the time-hardening material filled in the insertion hole of the second concrete member.

  A joint structure between concrete members according to a fifth aspect of the present invention is the joint structure between concrete members for joining a first concrete member and a second concrete member, wherein the first concrete member has a first surface formed on an outer surface. The fibrous member is inserted into the insertion hole of the second concrete member, and the second concrete member is inserted into the second insertion hole formed on the outer surface facing the first insertion hole. The first insertion hole and the second insertion hole may be filled with a time-hardening material.

  The joint structure between concrete members according to a sixth aspect of the present invention is the joint structure according to the fifth aspect, wherein either one or both of the first concrete member and the second concrete member is the first insertion hole and the second insertion hole A spiral rebar is embedded so as to surround either or both of the above.

  In the joint structure between concrete members according to the seventh invention, in the fifth invention or the sixth invention, an elastic member having an elastic force is inserted into the first insertion hole and the second insertion hole, and the elasticity A member is in contact with the fiber member.

  In the joint structure between concrete members according to the eighth invention, in any one of the first invention to the seventh invention, the fiber member is formed in a flat plate shape, and is flat plate orthogonal to a direction in which a shear force acts. Are characterized in that they are arranged.

  In the joint structure between concrete members according to the ninth invention, in any of the first invention to the eighth invention, the first concrete member is any one of a floor slab and a wall column, and the second concrete member is , And the other is a floor slab and a wall column.

  According to the present invention having the above-described configuration, the joint structure between the concrete members exerts a remarkable effect when, for example, a substantially horizontal external force from the side surface of the road is applied to the outside due to a collision of the vehicle. Do. That is, when an external force is applied, when the second concrete member inclines outward, the tensile force that causes the fiber member to pull out in the joining direction, and shear fracture in the width direction orthogonal to the joining direction Although it is possible to act as shear forces, it is possible to counter these forces through the strong adhesion of the time-hardenable material to the fiber member.

  At this time, by forming the outer surface in a concavo-convex shape by weaving the fiber member from the upper end to the lower end, the adhesion to the time-hardening material can be enhanced, and the pull-out preventing effect of the fiber member Can be enhanced. Similarly, the adhesion to the time-hardenable material can be enhanced by forming fine irregularities and the like on the inner peripheral surface of the insertion hole. As a result, it is possible to prevent the time-hardening material from being pulled out of the insertion hole together with the fiber member.

  Further, according to the present invention, a spiral reinforcing bar is embedded so as to surround the insertion hole. If a force to pull out the fiber member acts, it can be countered through the inward restraining force acting on the insertion hole through the spiral reinforcing bar.

  In addition to this, a part of the concrete that constitutes the second concrete member adhering to the time-hardenable material may act to split and pull out together, but the inward restraint via the spiral rebar By exerting the force, it is possible to suppress such cracking of the concrete itself.

It is a perspective view in a 1st embodiment of junction structure between concrete members to which the present invention is applied. It is a front sectional view in a 1st embodiment of junction structure between concrete members to which the present invention is applied. It is a sectional side view in a 1st embodiment of junction structure between concrete members to which the present invention is applied. It is a figure for demonstrating the joining method of a 1st concrete member and a 2nd concrete member. It is a figure for describing a 2nd embodiment of junction structure between concrete members to which the present invention is applied. It is a figure for describing a 3rd embodiment of junction structure between concrete members to which the present invention is applied. It is a figure for describing a 4th embodiment of junction structure between concrete members to which the present invention is applied. It is a figure for describing 5th Embodiment of the bonded structure between concrete members to which the present invention is applied. In 5th Embodiment of the bonded structure between concrete members to which this invention is applied, it is a figure for demonstrating the procedure which makes a fiber member project from the 1st concrete member in which the penetration hole was formed. In a fifth embodiment of the joint structure between concrete members to which the present invention is applied, a procedure for simultaneously filling a time-hardenable material in the insertion hole of the first concrete member and the insertion hole of the second concrete member will be described. FIG.

  Hereinafter, an embodiment for carrying out a joint structure between concrete members to which the present invention is applied will be described in detail with reference to the drawings.

  FIG. 1 is a perspective view of a first embodiment of a joint structure 1 between concrete members to which the present invention is applied, FIG. 2 is a front sectional view thereof, and FIG. 3 is a side sectional view thereof. The joint structure 1 between concrete members to which the present invention is applied is used to join the first concrete member 2 and the second concrete member 3.

  The first concrete member 2 is a concrete floor slab used for a bridge or the like, and the second concrete member 3 is disposed at the side end in the width direction. The second concrete member 3 is a precast concrete wall column, and is extended in the axial direction of the first concrete member 2 to separate the road side from the outer side. The second concrete member 3 is disposed along the lateral end of the first concrete member 2 in the width direction. The joint structure 1 between concrete members according to the first embodiment is a concrete floor slab in which the first concrete member 2 is used for a bridge or the like, and the second concrete member 3 exemplifies a concrete wall height column made of precast Although it will be described, in the present invention, the first concrete member 2 may be a precast concrete wall column, and the second concrete member 3 may be a concrete floor slab used for a bridge or the like.

  The second concrete member 3 has a rectangular shape whose longitudinal direction is the vertical direction, and is made of so-called reinforced concrete in which reinforcing bars 35 and 36 are embedded. Among them, the reinforcing bars 36 are constituted by a plurality of bars extending linearly in the axial direction. Further, the reinforcing bars 35 are extended in the vertical direction so that the reinforcing bars 36 are inscribed, and the upper and lower ends are bent in an arc shape. The side surface of the second concrete member 3 includes a road side 3a facing the road and an outer side 3b facing the outside of the road bridge.

  The reinforced concrete second concrete member 3 further includes an insertion hole 31, a hole 32 communicating with the insertion hole 31, a hole 33, a spiral reinforcing bar 34 embedded around the insertion hole 31, and a reinforcing bar 35. And a cable 37 provided in the enclosed area. Further, the bottom surface 3d of the second concrete member 3 has a recess 38 recessed upward, a first bottom 39a extended from the recess 38 toward the road side surface 3a, and an outer surface from the recess 38. And a second bottom 39b extending towards 3b.

  The first concrete member 2 includes a fiber member 4 and a spiral reinforcing bar 24 embedded around the fiber member 4. On the upper surface of the side end in the width direction of the first concrete member 2, a convex portion 28 provided to be convex upward and a first upper portion 29 a extended from the convex portion 28 to the road side surface 3 a And a second upper portion 29b extended from the convex portion 28 toward the outer side surface 3b.

  The insertion hole 31 is configured as a hole formed in the bottom surface 3 d of the second concrete member 3. The insertion hole 31 may be formed by cutting the bottom surface 3 d of the second concrete member 3 with a drilling machine or the like, or is formed by removing the box from the bottom surface 3 d of the second concrete member 3 in advance. It may be done. The insertion hole 31 is configured to have a diameter larger than the outer diameter of the fiber member 4. The insertion hole 31 has a shape that is reduced in diameter toward the upper side, and has a three-dimensional shape such as a truncated pyramid or a truncated cone, but is not limited thereto. That is, the insertion hole 31 may have a cylindrical or rectangular shape without diameter expansion or diameter reduction in the vertical direction, or regular or irregular diameter expansion or diameter reduction may be performed. . Furthermore, fine irregularities and the like may be formed on the inner peripheral surface of the insertion hole 31. In addition, although the penetration hole 31 shown in FIG. 2 is comprised as a hole cut down to the upper direction from the recessed part 38 to the last, in the structure which does not provide the recessed part 38 intentionally, any bottom face 3d in the 2nd concrete member 3 It may be provided at a place.

  The hole 32 is a hole for connecting the road side surface 3 a of the second concrete member 3 and the insertion hole 31. The hole 32 is a hole which is continuous with the upper side of the insertion hole 31 and is provided for discharging a time-hardening material including non-shrink mortar and the like from the insertion hole 31. The hole 32 may be curved upward from the insertion hole 31 and may be inclined downward toward the road side surface 3 a. Further, the hole 32 may be curved upward from the insertion hole 31 and then inclined downward toward the outer side surface 3 b.

  The hole 33 is a hole for connecting the road side surface 3 a of the second concrete member 3 and the insertion hole 31. The hole 33 is a hole which is continuous with the lower side of the insertion hole 31 and is provided for injecting a time-hardening material including a non-shrink mortar and the like into the insertion hole 31. The hole 33 may be curved upward from the insertion hole 31 and may be inclined downward toward the road side surface 3 a. Further, the hole 33 may be curved upward from the insertion hole 31 and then inclined downward toward the outer side surface 3 b.

  The spiral reinforcing bar 34 is a reinforcing bar bent in advance in a spiral shape. The spiral reinforcing bar 34 is disposed so as to surround the insertion hole 31 from the outer peripheral side of the insertion hole 31. The spiral reinforcing bars 34 are embedded in advance in the concrete constituting the second concrete member 3.

  The cable 37 is a cable used to connect the second concrete members 3 adjacent to each other in the bridge axial direction. Specifically, the cable 37 is embodied as various cables such as a carbon fiber cable, a PC steel material, a stainless steel material, and a steel cable. A cable hole (not shown) for inserting the cable 37 is bored in each of the second concrete members 3. When joining the adjacent second concrete members 3, the cable 37 may be inserted into the cable hole (not shown), and tension may be applied to this when necessary.

  The recesses 38 are provided with insertion holes 31 at intervals in the axial direction as shown in FIG. The first bottom 39a slopes downward toward the road side 3a. The second bottom 39 b is inclined downward toward the outer side 3 b. In other words, the first bottom 39a and the second bottom 39b are inclined downward toward the outside in the width direction.

  As the fiber member 4, nonmetallic fibers such as aramid fibers, carbon fibers, glass fibers, ultrahigh molecular weight polyethylene fibers, polyarylate fibers and the like are used. The outer surface 41 of the fiber member 4 is formed in a concavo-convex shape by fibers being woven from the upper end to the lower end. The fiber member 4 is formed in a flat plate shape by impregnating the fiber with a resin, but the present invention is not limited to this, and may be formed in any shape such as a rod shape or a cylindrical shape. When the direction in which the first concrete member 2 and the second concrete member 3 are joined is taken as the joining direction, the fiber direction of the fibers of the fiber member 4 is oriented in the joining direction, and the fibrous member 4 is arranged. In addition, steel fiber may be used for the fiber member 4 other than nonmetallic fiber is used.

  The lower half of the fiber member 4 is embedded in the concrete constituting the first concrete member 2. As a result, the upper half of the fiber member 4 protrudes upward from the upper surface 2 d of the first concrete member 2. The upper half of the protruded fiber member 4 is inserted into the insertion hole 31. Since the insertion hole 31 is larger in diameter than the fiber member 4, the fiber member 4 is loosely fitted to the insertion hole 31. The insertion hole 31 into which the loosely fitted fiber member 4 is inserted is filled with a time-hardening material such as non-shrink mortar.

  An elastic member 5 having an elastic force abuts on a substantially central portion of the fiber member 4. The elastic member 5 is formed in a flat plate shape using, for example, an elastic body such as natural rubber, chloroprene rubber or butadiene rubber. The elastic member 5 is abutted so as to sandwich both outer surfaces 41 of the flat fiber member 4, and the fiber member 4 is interposed. In addition, the elastic member 5 may be wound and provided so that the circumference | surroundings of the fiber member 4 may be surrounded. Moreover, as long as the elastic member 5 is in contact with the fiber member 4, the elastic member 5 is not limited to a flat plate, and may be formed in any shape.

  The lower half of the elastic member 5 is embedded in the concrete constituting the first concrete member 2. As a result, the upper half of the elastic member 5 protrudes upward from the upper surface 2 d of the first concrete member 2. The upper half of the projected elastic member 5 is inserted into the insertion hole 31. Since the insertion hole 31 is larger in diameter than the elastic member 5, the elastic member 5 is loosely fitted to the insertion hole 31. A time-hardening material such as non-shrink mortar is filled in the insertion hole 31 into which the loosely fitted elastic member 5 is inserted.

  The spiral reinforcing bar 24 is a reinforcing bar bent in advance in a spiral shape, like the spiral reinforcing bar 34. The spiral reinforcing bar 24 is disposed so as to surround the fiber member 4 from the outer peripheral side of the insertion hole 31. The spiral rebar 24 is embedded in the first concrete member 2 in advance.

  The convex portion 28 is provided so that the position in the width direction is aligned with the concave portion 38 as shown in FIG. The first upper portion 29a is inclined downward toward the road side 3a. The second bottom 19b is inclined downward toward the outer side 3b. In other words, the first upper portion 29a and the second upper portion 29b are inclined downward toward the widthwise outer side.

  When actually installing the second concrete member 3 at the side end of the first concrete member 2, the convex portion 28 is made to face the concave portion 38, the first upper portion 29a is made to face the first bottom portion 39a, and the second upper portion 29b is made to face the second bottom 39b, and a time-hardening material such as non-shrink mortar or resin mortar is filled between them.

  Next, a method of joining the first concrete member 2 and the second concrete member 3 will be described.

  First, as shown in FIG. 4A, the process is started from the state where the construction of the first concrete member 2 is completed. In this state, the upper half of the fiber member 4 is projected upward from the upper surface 2 d of the first concrete member 2.

  Next, the 2nd concrete member 3 manufactured beforehand in a factory is carried in to the field. Then, as shown in FIG. 4B, the convex portion 28 faces the concave portion 38, the first upper portion 29a faces the first bottom portion 39a, and the second upper portion 29b faces the second bottom portion 39b. Are temporarily held apart from each other.

  Next, as shown in FIG. 4C, the temporally curable material 6 is injected from the holes 33. The time-hardening material 6 is injected into the hole 33 through a hose 91. The time-curable material 6 injected from the hole 33 reaches the insertion hole 31 and is filled so as to fill the fiber member 4 and the elastic member 5 inserted in the insertion hole 31. The filled time-hardening material 6 hardens and firmly adheres to the fiber member 4 and the elastic member 5 and also adheres firmly to the insertion hole 31. As a result, the insertion hole 31 and the fiber member 4 and the elastic member 5 are firmly connected to each other through the hardened time-hardening material 6, and thus the second concrete member 3 is made to the first concrete member 2. It becomes possible to install firmly. The time-hardenable material 6 may be injected from between the first upper portion 29a and the first bottom portion 39a.

  The time-hardening material 6 having reached the insertion hole 31 is the convex portion 28 constituting the upper surface 2 d of the first concrete member 2 as it is, the first upper portion 29 a, the second upper portion 29 b, and the bottom surface 3 d of the second concrete member 3. It flows also between the recessed part 38 which comprises these, the 1st bottom part 39a, and the 2nd bottom part 39b. As a result, the time-hardening material 6 is also filled between the upper surface 2 d of the first concrete member 2 and the bottom surface 3 d of the second concrete member 3, and the time-hardenable material 6 hardens to make them mutually different. It will be firmly joined.

  By the way, the second concrete member 3 is placed on the upper surface 2 d of the first concrete member 2 in advance, and then the second concrete member 3 is placed, and the time-hardenable material 6 is injected from the holes 32 thereon. The inside of 31 may be filled with this time-hardening material 6.

  Thus, for example, when a substantially horizontal external force is applied to the second concrete member 3 installed at the side end of the first concrete member 2 from the road side 3a to the outside due to a collision of the vehicle. Think. In such a case, the tensile force with which the fiber member 4 tends to pull out in the joining direction when the second concrete member 3 is inclined outward, and shear fracture in the width direction orthogonal to the joining direction Although shear forces act, these forces can be countered through the strong adhesion of the time-hardenable material 6 to the fiber member 4.

  At this time, the fiber member 4 is woven from the upper end to the lower end, and by forming the outer surface 41 in a concavo-convex shape, the adhesion to the time-hardenable material 6 can be enhanced. The pullout prevention effect and the shear failure prevention effect can be enhanced. Similarly, the adhesion to the time-hardenable material 6 can be enhanced by forming fine irregularities and the like on the inner peripheral surface of the insertion hole 31. As a result, it is possible to prevent the time-hardening material 6 from being pulled out of the insertion hole 31 together with the fiber member 4. Moreover, since the fiber member 4 is formed in a flat plate shape, the surface area with respect to the cross-sectional area is larger than, for example, formed in a rod-like shape, so the adhesion with the time-hardenable material 6 can be more effectively exhibited. . And since the fiber member 4 is formed in flat form and exerts adhesive force effectively, the embedding length with respect to the 1st concrete member 2 and the adhesion length with respect to the penetration hole 31 can also be shortened, and by extension, the 1st concrete It is possible to expand the applicability of the use place of the member 2 and the second concrete member 3.

  Furthermore, according to the present invention, a spiral reinforcing bar 34 is embedded so as to surround the insertion hole 31. If a tensile force acts on the fiber member 4, it can be countered through the inward restraining force acting on the insertion hole 31 via the spiral reinforcing bar 34.

  In addition to this, a part of the concrete that constitutes the second concrete member 3 adhering to the time-hardenable material 6 may act to split and pull out together, but it is possible to use the spiral rebar 34 to It is possible to suppress such cracking of the concrete itself by exerting a restraining force in the direction.

  Further, in the present invention, also in the first concrete member 2, the spiral rebar 24 is similarly provided around the fiber member 4, so that the fiber member 4 can resist the tensile force. It is possible to strongly prevent that the concrete in the vicinity is pulled out together by splitting.

  Further, in the present invention, the fiber member 4 is disposed so that the weaving direction of the fiber member 4 is directed to the joining direction of the first concrete member 2 and the second concrete member 3. For this reason, according to the present invention, the tensile force acting on the fiber member 4 can be efficiently countered.

  Furthermore, according to the present invention, when the outer surface 41 of the fiber member 4 is disposed orthogonal to the width direction in which the shear force acts, when the shear force acts on the fiber member 4 temporarily, the fiber member 4 is deformed. Since it can be deformed flexibly, it is possible to prevent the fiber from breaking. Incidentally, in the present invention, the outer surface 41 of the fiber member 4 may be disposed parallel to the width direction in which the shear force acts.

  Further, according to the present invention, the elastic member 5 protruding from the first concrete member 2 is provided in contact with the fiber member 4 so that when the fiber member 4 is subjected to a tensile force, the elastic member 5 is elastic. It is possible for the member 5 to counteract this tensile force. In particular, according to the present invention, by interposing the fiber member 4 in the elastic member 5, it is possible to further enhance the effect of the elastic member 5 against the tensile force.

  Further, according to the present invention, since the elastic member 5 protruding from the first concrete member 2 is provided in contact with the fiber member 4, the elastic force is applied when the shearing force acts on the fiber member 4 temporarily. It is possible for the member 5 to resist this shear force. In particular, according to the present invention, by interposing the fiber member 4 in the elastic member 5, it is possible to further enhance the effect of the elastic member 5 against the shearing force.

  Furthermore, in the joint structure 1 between concrete members to which the present invention is applied, the convex portion 28 faces the concave portion 38, the first upper portion 29a faces the first bottom portion 39a, and the second upper portion 29b faces the second bottom portion 39b. Then, a time-hardening material such as non-shrink mortar is filled between them. As a result, when external force is applied in the horizontal direction, it is possible to cause the facing convex portion 28 and the concave portion 38 to act as a shear key capable of resisting so-called shear stress. That is, although a shear force is exerted between the convex portion 28 and the concave portion 38 when an external force directed outward from the road side surface 3 a is applied, the shear portion is inserted into the concave portion 38 so that the shear is generated. You can fight against the force.

  In particular, according to the present invention, non-metallic fibers such as aramid fibers are used for the fiber member 4 embedded in the time-hardenable material 6, and an elastic body is used for the elastic member 5. For this reason, even if a corrosion factor such as water or salt enters the time-hardening material 6 from the outside, since the metal-based material causing the corrosion is not used, the fiber member 4 and the elastic member 5 are corroded. I have not. Therefore, according to the present invention, it is possible to reliably prevent a decrease in yield strength due to corrosion without corrosion of the joint portion between the first concrete member 2 and the second concrete member 3.

  Further, according to the present invention, moisture is externally applied by inclining the holes 32 downwardly toward the outer side surface 3b and by inclining the holes 33 downwardly toward the road side surface 3a and the outer side surface 3b. It becomes possible to make it the structure which corrosion factors, such as salt content, can not enter easily. That is, since the hole 32 and the hole 33 are inclined upward toward the insertion hole 31, the intrusion is prevented before reaching the insertion hole 31 for a corrosion factor which is going to intrude from the outside. As a result, since no corrosion factor enters the insertion hole 31, even if steel fibers are used for the fiber member 4 inserted inside, it is possible to prevent the fiber member 4 from being corroded. It becomes.

  In the embodiment described above, an example is described in which the first concrete member 2 is a floor slab and the second concrete member 3 is a wall height column, but the present invention is not limited to this, and any concrete member It may be used for joining between.

  FIG. 5 shows a plan sectional view of a second embodiment of the joint structure 1 between concrete members to which the present invention is applied. In this embodiment, the first concrete member 102 and the second concrete member 103 are both precast concrete wall columns.

  The side surface of the second concrete member 103 includes a road side surface 103a facing the road side and an outer side surface 103b facing the outside of the road bridge. The second concrete member 103 includes an insertion hole 31, a hole 32 communicating with the insertion hole 31, a hole 33, and a spiral reinforcing bar 34 embedded around the insertion hole 31. In addition, an axial start surface 103 d of the second concrete member 103 is a concave portion 138 concaved in a lateral direction (axial direction), and a first surface extending from the concave portion 138 toward the road side surface 103 a. A bottom portion 139a and a second bottom portion 139b extending from the recess 138 toward the outer side surface 103b.

  The side surface of the first concrete member 102 includes a road side surface 102 a facing the road side and an outer side surface 102 b facing the outside of the road bridge. The first concrete member 102 includes a fiber member 4 and a spiral reinforcing bar 24 embedded around the fiber member 4. In the axial end surface 102d of the first concrete member 102, a convex portion 128 provided in a convex shape toward the side (axial direction) and an extending portion from the convex portion 128 toward the road side surface 3a It has a first upper portion 129a and a second upper portion 129b extended from the convex portion 128 toward the outer side surface 103b.

  At this time, also in the second embodiment, the joint structure 1 between concrete members to which the present invention is applied can prevent the reduction of the yield strength from the joint portion between the concrete members, which is larger than the concrete member. Even when an external force is applied, it is possible to exhibit strong durability.

  FIG. 6 shows a front sectional view of a third embodiment of a joint structure 1 between concrete members to which the present invention is applied. In this embodiment, the first concrete member 2 and the second concrete member 3 are both concrete columns used for civil engineering structures, building structures and the like.

  The second concrete member 3 includes an insertion hole 31, a hole 32 communicating with the insertion hole 31, a hole 33, and a spiral reinforcing bar 34 embedded around the insertion hole 31. Further, the bottom surface 3d of the second concrete member 3 includes a recess 38 recessed upward and a first bottom 39a extended from the recess 38 to one side surface in the width direction, and a recess And 38 a second bottom 39 b extended from the other side in the width direction.

  The first concrete member 2 includes a fiber member 4 and a spiral reinforcing bar 24 embedded around the fiber member 4. The upper surface 2d of the first concrete member 2 has a convex portion 28 provided to be convex upward and a first upper portion 29a extended from the convex portion 28 to the side surface on one side in the width direction And a second upper portion 29 b extended from the convex portion 28 to the other side surface in the width direction.

  Even in the third embodiment, the joint structure 1 between concrete members to which the present invention is applied makes it possible to prevent the reduction in yield strength from the joint portion between the concrete members, and a large external force is applied to the concrete members. Even in the case where it is carried out, it becomes possible to exhibit strong durability.

  FIG. 7 shows a side sectional view of a fourth embodiment of a joint structure 1 between concrete members to which the present invention is applied. In this embodiment, the first concrete member 102 and the second concrete member 103 are both concrete girder members used for a bridge or the like.

  In the joint structure 1 between concrete members to which the present invention is applied, the first concrete member 102 and the second concrete member 103 are connected in the axial direction which is a substantially horizontal direction, and the width direction is the vertical direction. Therefore, gravity acts on the first concrete member 102 and the second concrete member 103 in the width direction, and shear force acts on the fiber member 4 in the width direction.

  At this time, in the joint structure 1 between concrete members to which the present invention is applied, it is possible to prevent the reduction of the yield strength from the joint portion between the concrete members also in the fourth embodiment. Even when an external force is applied, it is possible to exhibit strong durability.

  In particular, in the joint structure 1 between concrete members to which the present invention is applied, a shear force acts on the fiber member 4 in the width direction in the fourth embodiment. For this reason, in the joint structure 1 between concrete members to which the present invention is applied, in the fourth embodiment, the outer surface 41 of the fiber member 4 is disposed orthogonal to the width direction in which the shear force acts. When the shearing force acts on the member 4, the fiber member 4 can be flexibly deformed, so that breakage of the fiber can be prevented.

  FIG. 8 shows a side cross-sectional view of a fifth embodiment of a joint structure 1 between concrete members to which the present invention is applied.

  In this embodiment, an insertion hole 27 is formed in the first concrete member 2, and the insertion hole 27 is filled with a time-hardening material 7 such as non-shrink mortar.

  The insertion hole 27 is configured as a hole cut from the upper surface 2 d of the first concrete member 2. The insertion hole 27 may be formed by cutting the upper surface 2 d of the first concrete member 2 with a drilling machine or the like, or is formed by removing the box on the upper surface 2 d of the first concrete member 2 in advance. It may be done. The insertion hole 27 is configured to be larger in diameter than the outer diameter of the fiber member 4. Although the insertion hole 27 is formed in a cylindrical shape without diameter expansion and diameter reduction as it goes in the vertical direction, it is not limited to this. That is, the insertion hole 27 may have a rectangular parallelepiped shape without diameter expansion or diameter reduction as it goes in the vertical direction, or regular or irregular diameter expansion or diameter reduction may be performed. Further, the insertion hole 27 may be shaped so as to be reduced in diameter toward the lower side, and may be so-called three-dimensional shape such as a truncated pyramid or a truncated cone. Furthermore, fine irregularities and the like may be formed on the inner peripheral surface of the insertion hole 27. In addition, although the insertion hole 27 shown in FIG. 8 is configured as a hole that is cut downward from the convex portion 28 to the last, in a configuration in which the convex portion 28 is not provided intentionally, the upper surface 2 d of the first concrete member 2 It may be provided at any place of

  The lower half of the fiber member 4 is embedded in the time-hardening material 7 filled in the insertion hole 27 of the first concrete member 2. As a result, the upper half of the fiber member 4 protrudes upward from the upper surface 2 d of the first concrete member 2.

  The lower half of the elastic member 5 is embedded in the time-hardening material 7 filled in the insertion hole 27 of the first concrete member 2. As a result, the upper half of the elastic member 5 protrudes upward from the upper surface 2 d of the first concrete member 2.

  The spiral reinforcing bar 24 is disposed so as to surround the insertion hole 27 from the outer peripheral side of the insertion hole 27. The spiral reinforcing bars 24 are embedded in advance in the concrete constituting the first concrete member 2.

  At this time, also in the fifth embodiment, the joint structure 1 between concrete members to which the present invention is applied can prevent the reduction of the yield strength from the joint portion between the concrete members, which is larger than the concrete member. Even when an external force is applied, it is possible to exhibit strong durability.

  FIG. 9 is a view for explaining the procedure for causing the fiber member 4 to project from the first concrete member 2 in which the insertion hole 27 is formed in the fifth embodiment of the joint structure 1 between concrete members to which the present invention is applied. is there.

  When projecting the fiber member 4 from the 1st concrete member 2 in which the penetration hole 27 was formed, as shown to Fig.9 (a) first, it starts from the state in which the construction of the 1st concrete member 2 is completed. . In this state, the fiber member 4 is not protruded upward from the upper surface 2 d of the first concrete member 2.

  Next, as shown in FIG. 9 (b), the insertion hole 27 is cut downward from the upper surface 2 d of the first concrete member 2. The cutting of the insertion hole 27 is performed at the site where the construction of the first concrete member 2 is completed. In addition, what the penetration hole 27 is previously formed as the 1st concrete member 2 may be used. At this time, the cutting work of the insertion hole 27 can be omitted.

  Next, as shown in FIG. 9C, the insertion hole 27 is filled with the time-hardening material 7. At this time, the fiber member 4 and the elastic member 5 may be inserted into the insertion hole 27 in a temporarily held state, and the time-hardening material 7 may be filled, or the insertion hole 27 may be filled with the time-hardening material 7 The fiber member 4 and the elastic member 5 may be inserted before the filled time-curable material 7 is cured. Then, the filled time-hardening material 7 hardens and firmly adheres to the fiber member 4 and the elastic member 5 and also adheres firmly to the insertion hole 27. As a result, the insertion hole 27 and the fiber member 4 and the elastic member 5 are firmly connected to each other through the hardened time-hardening material 7, and the upper half of the fiber member 4 is the upper surface 2 d of the first concrete member 2. Is projected upward from the Thereafter, the first concrete member 2 and the second concrete member 3 may be joined.

  Thus, in the fifth embodiment, the joint structure 1 between concrete members to which the present invention is applied is made by cutting the insertion hole 27 in the first concrete member 2 and using the time-hardenable material 7 filled in the insertion hole 27. The fiber member 4 is made to project. For this reason, the joint structure 1 between concrete members to which the present invention is applied makes it possible to newly join the second concrete member 3 to the existing first concrete member 2 via the fiber member 4, for example It can be applied to replacement work and repair work of concrete members.

  In the embodiment described above, although the insertion hole 27 is filled with the time-hardening material 7, the insertion hole 31 is filled with the time-hardening material 6, but the insertion hole 27 and the insertion hole 31 are simultaneously hardened with time 6 May be filled. FIG. 10 shows a fifth embodiment of the joint structure 1 between concrete members according to the present invention, in which the time-hardening material 6 is simultaneously applied to the insertion hole 27 of the first concrete member 2 and the insertion hole 31 of the second concrete member 3. It is a figure for demonstrating the procedure of filling.

  First, as shown in FIG. 10A, at the site where the construction of the first concrete member 2 is completed, the insertion hole 27 is cut downward from the upper surface 2 d of the first concrete member 2, and the cut-through hole 27 is cut. The fiber member 4 and the elastic member 5 are inserted while being temporarily held. At this time, the elastic member 5 is in contact with the fiber member 4.

  Next, as shown in FIG. 10 (b), the second concrete member 3 is carried into the site, and the fiber member 4 and the elastic member 5 inserted in a state of being temporarily held in the insertion hole 27 are inserted into the insertion hole 31. .

  Next, as shown in FIG. 10C, the time-hardening material 6 is filled in the insertion hole 27 and the insertion hole 31 facing the insertion hole 27. Then, the filled time-hardening material 6 hardens and adheres firmly to the fiber member 4 and the elastic member 5 and also adheres firmly to the insertion hole 27 and the insertion hole 31. As a result, the insertion hole 27 and the insertion hole 31 as well as the fiber member 4 and the elastic member 5 are firmly connected to each other through the hardened time-hardening material 6, and the first concrete member 2 and the second concrete member 3 Bonding with is completed.

  In the joint structure 1 between concrete members to which the present invention is applied, the spiral reinforcing bars 24 and 34 may be omitted in the first to fifth embodiments.

  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.

  In particular, the first concrete member 2 102 and the second concrete member 3 103 may be used to join concrete members such as wall material, column material, beam material, girder material, floor slab, concrete frame, etc. May be in any combination.

1 Connection structure between concrete members 2 first concrete member 2 d upper surface 24 spiral reinforcing bar 27 insertion hole 28 convex portion 29 a, 29 b upper portion 3 second concrete member 3 a road side 3 b outer side surface 3 d bottom surface 31 insertion hole 32 hole 33 hole 34 spiral reinforcing bar 35 Reinforcement 36 Reinforcement 37 Cable 38 Recess 39a, 39b Bottom 4 Fiber member 41 Outer surface 5 Elastic member 6 Time-hardening material 7 Time-hardening material 102 First concrete member 102d End surface 128 Convex part 129a, 129b Side part 103 Second concrete Member 103d Start end surface 138 Recess 139a, 139b Side

Claims (9)

In a joint structure between concrete members for joining a first concrete member and a second concrete member,
In the first concrete member, a fibrous fiber member is protruded,
The joint structure between concrete members characterized in that the second concrete member is formed by inserting the fiber member into an insertion hole formed on the outer surface and being filled with a time-hardening material. The joint structure between concrete members according to claim 1, wherein a spiral reinforcing bar is embedded in the second concrete member so as to surround the insertion hole. The joint between concrete members according to claim 1 or 2, wherein a part of the fiber member is embedded in the first concrete member, and a spiral reinforcing bar is embedded in the periphery of the embedded fiber member. Construction. The first concrete member is abutted to the fiber member while an elastic member having an elastic force is protruded.
The joint structure according to any one of claims 1 to 3, wherein the elastic member is embedded in the time-hardening material filled in the insertion hole of the second concrete member. In a joint structure between concrete members for joining a first concrete member and a second concrete member,
In the first concrete member, a fibrous fiber member is inserted into a first insertion hole formed on the outer surface,
In the second concrete member, the fiber member is inserted into a second insertion hole formed on the outer surface facing the first insertion hole,
A joint structure between concrete members, wherein the first insertion hole and the second insertion hole are filled with a time-hardening material. In one or both of the first concrete member and the second concrete member, a spiral reinforcing bar is embedded so as to surround either or both of the first insertion hole and the second insertion hole. The joint structure between concrete members according to claim 5, characterized in that: An elastic member having an elastic force is inserted into the first insertion hole and the second insertion hole, and the elastic member is in contact with the fiber member. Bonding structure between concrete members. The concrete member according to any one of claims 1 to 7, wherein the fiber member is formed in a flat plate shape, and a flat plate surface is disposed orthogonal to a direction in which a shear force acts. Joint structure between. The first concrete member is either a floor slab or a wall column,
The joint structure between concrete members according to any one of claims 1 to 8, wherein the second concrete member is any one of a floor slab and a wall column.

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