JP6099341B2 - Shear reinforcement structure of plate-like concrete structure - Google Patents

Description

  The present invention relates to a shear reinforcement structure for a plate-like concrete structure such as a box culvert wall.

  Conventionally, for example, a box-cylinder reinforced concrete structure with a rectangular cross section embedded in the ground, in order to improve the shear strength of the wall of the box culvert used for passages, waterways, joint grooves, etc. A hole extending along a direction parallel to the shear direction of the metal (that is, a hole extending perpendicularly to the wall surface) is formed in the wall, and a rod-shaped reinforcing material is inserted into the hole to reinforce the inner wall of the hole. It is known to construct a shear reinforcement structure for the wall by filling a filler with the material.

JP 2007-303100 A

The hole for inserting the rod-shaped reinforcing material into the wall as the plate-like concrete structure of the box culvert is generally formed by drilling from the inner space side of the box culvert to the wall surface of the box culvert. However, if there are pipes, cables, or other obstacles near the wall (in front of the wall) of the interior space of the box culvert, the obstacles become obstacles and the wall behind the obstacles. Since the drilling drill cannot be abutted vertically, a hole that extends perpendicularly to the wall surface from the inner space side of the box culvert cannot be formed in the wall, and a shear reinforcement structure cannot be constructed. There was a problem.
The present invention relates to a shear reinforcement for a plate-like concrete structure capable of improving the shear strength of the plate-like concrete structure without forming a hole extending in the direction parallel to the shear direction in the plate-like concrete structure. Provide structure.

The shear reinforcement structure for a plate-like concrete structure according to the present invention is inserted into a hole provided in the plate-like concrete structure so as to extend obliquely to the member axis of the plate-like concrete structure. A filler is provided between the formed rod-shaped reinforcing material and the inner wall of the hole, and the rod-shaped reinforcing material extends in a direction obliquely intersecting the member axis of the plate-like concrete structure. In a hole different from the hole fixed in the hole and obliquely intersecting the member axis of the plate-like concrete structure and extending in a direction intersecting the extending direction of the hole A filler is provided between the rod-shaped reinforcing material different from the rod-shaped reinforcing material inserted into the inner wall of the another hole, and the another rod-shaped reinforcing material is a member of a plate-like concrete structure. Intersects the axis diagonally and above Since secured within said another hole to extend in a direction intersecting the extending direction of the reinforcement rod-shaped, without forming a hole extending along a direction parallel to the shear direction to the plate-like concrete structure In addition, a shear reinforcement structure for a plate-like concrete structure that can improve the shear strength of the plate-like concrete structure can be realized.
In addition, a plate-like concrete structure is a box culvert wall installed in the ground, and the hole is a hole formed in the box culvert wall from the inner space side of the box culvert, so that the box culvert wall is sheared. Without forming a hole extending along a direction parallel to the direction, a shear reinforcement structure capable of improving the shear strength of the wall of the box culvert can be realized.
Further, since the plate-like concrete structure is a box culvert wall installed in the ground, and the hole is a hole formed in the box culvert wall from the upper end surface of the box culvert wall, the internal space of the box culvert Even if it is a case where the operation | work which forms a hole in a wall from the side cannot be performed, the shear reinforcement structure which can improve the shear strength of the wall of a box culvert is realizable.
Further, the shear reinforcement structure for a plate-like concrete structure according to the present invention is provided in a hole provided in the plate-like concrete structure so as to extend obliquely with respect to the member axis of the plate-like concrete structure. A filler is provided between the rod-shaped reinforcing material inserted in the hole and the inner wall of the hole so that the rod-shaped reinforcing material extends in a direction obliquely intersecting the member axis of the plate-like concrete structure. A plate-like concrete structure fixed in the hole, wherein the plate-like concrete structure is a wall of a box culvert installed in the ground, and the hole is an upper end surface of the box-culvert wall Since the hole is formed in the wall of the box culvert from the inner space side of the box culvert, even if the operation of forming the hole in the wall cannot be performed, Shear reinforcement structure that can improve the N cross tolerance can be realized.

The figure which shows the shear reinforcement structure of the wall of a box culvert (Embodiment 1). The figure which shows the shear reinforcement structure of the wall of a box culvert (Embodiment 2).

Embodiment 1
As an example of a shear reinforcement structure of a plate-like concrete structure, for example, a shear reinforcement structure of a wall of a box culvert will be described with reference to FIG.
The box culvert 1 is a box-cylinder reinforced concrete structure having a square cross section, for example, embedded in the ground 100, and is used for a passage, a water channel, a common groove, and the like.

In the first embodiment, when forming the hole 5 for inserting the rod-shaped reinforcing material 4 into the wall 3 of the box culvert 1 from the inner space 2 side of the box culvert 1, the hole 5 is formed in the extending direction of the box culvert 1. Is formed so as to extend in a direction obliquely intersecting with the shearing direction 12 of the wall 3 on a plane 11 orthogonal to the center line (center axis) 10 of the box culvert 1 along the axis.
In other words, the hole 5 is formed on the surface 11 orthogonal to the center line 10 of the box culvert 1 so as to extend in a direction obliquely intersecting the member axis 13 of the wall 3. The member axis 13 of the wall 3 is a vertical axis with respect to the wall 3.
That is, the hole 5 in which the center line 14 (center axis) of the hole is inclined and extended on the surface 11 orthogonal to the center line 10 of the box culvert 1 in the wall 3 of the box culvert 1 is formed.

Then, after inserting the rod-shaped reinforcing material 4 into the hole 5 from the inner space 2 side of the box culvert 1, a filler (grout) 15 such as mortar is filled between the inner wall of the hole 5 and the reinforcing material 4. Or by inserting a rod-shaped reinforcing material 4 into the hole 5 after filling the hole 5 from the inner space 2 side of the box culvert 1 to the box 3 on the wall 3 of the box culvert 1. On the surface 11 orthogonal to the center line 10 of the culvert 1, the center line (center axis) of the rod-shaped reinforcing member 4 extends in a direction obliquely intersecting the shear direction 12 of the wall 3 (in other words, A shear reinforcement structure 20 fixed in the hole 5 is constructed so that the center line of the reinforcing member 4 extends in a direction obliquely intersecting the member axis 13 of the wall 3.
In other words, the shear reinforcement structure 20 fixed in the hole 5 so that the center line of the rod-shaped reinforcing member 4 is inclined and extended on the surface 11 orthogonal to the center line 10 of the box culvert 1 in the wall 3 of the box culvert 1. Therefore, the shear strength of the wall 3 of the box culvert 1 can be improved.

According to the first embodiment, the shear reinforcement capable of improving the shear strength of the wall 3 of the box culvert 1 without forming a hole extending along the direction parallel to the shear direction 12 in the wall 3 of the box culvert 1. Structure 20 can be constructed.
Further, when piping, cables, or other obstacles exist at the wall (in front of the wall) of the internal space 2 of the box culvert 1, the shear reinforcement structure 20 can be formed on the wall portion behind the obstacles. Therefore, the shear strength of the wall 3 of the box culvert 1 can be improved.

Embodiment 2
In the first embodiment, the hole 5 for inserting the rod-shaped reinforcing material 4 is formed in the wall 3 of the box culvert 1 from the inner space 2 side of the box culvert 1. However, as shown in FIG. A hole 30 reaching the upper end surface 29 of the wall 3 is cut out to form a hole 5 for inserting the rod-shaped reinforcing material 4 into the wall 3 of the box culvert 1 from the upper end surface 29 of the wall 3 of the box culvert 1. Then, the shear reinforcement structure 20 may be constructed so that the rod-shaped reinforcing material 4 is inserted into the hole 5 from the upper end surface 29 of the wall 3 of the box culvert 1.
In the second embodiment, as in the first embodiment, the hole 5 is inclined with respect to the shearing direction 12 of the wall 3 on the surface 11 perpendicular to the center line 10 of the box culvert 1 in the wall 3 of the box culvert 1. It is formed on the wall 3 so as to extend in the intersecting direction (in other words, so that the center line of the hole 5 extends obliquely with respect to the member axis 13 of the wall 3), and the bar-shaped reinforcement The center line of the material 4 extends in a direction obliquely intersecting the shear direction 12 of the wall 3 (in other words, the direction in which the center line of the reinforcing material 4 obliquely intersects the member axis 13 of the wall 3). A shear reinforcement structure 20 is constructed which is fixed in the hole 5 (to extend to

  According to the second embodiment, the same effect as the first embodiment can be obtained. According to the second embodiment, the wall 3 of the box culvert 1 can be used even when the inner space 2 of the box culvert 1 is narrow and the operation of forming the hole 5 in the wall 3 from the inner space 2 side cannot be performed. It becomes possible to construct a shear reinforcement structure 20 that can improve the shear strength.

  In the first and second embodiments, the shear reinforcement structure 20 of the wall 3 of the box culvert 1 has been described as an example. However, the shear reinforcement structure of the present invention is a lining of a building wall, a beam, a floor, and a mountain tunnel. It can also be applied to plate-like concrete structures such as concrete.

  The plate-like concrete structure may be an unreinforced concrete structure or a reinforced concrete structure.

  Further, as the rod-shaped reinforcing member 4, for example, a reinforcing bar or a reinforcing member as disclosed in Patent Document 1 (a rod-shaped reinforcing member having fixing plates at both ends) may be used.

1 Box culvert, 2 Box culvert internal space,
3 Box culvert wall (plate-like concrete structure), 4 bar-shaped reinforcement, 5 holes, 12 shear direction, 15 filler, 29 upper end surface of the box culvert wall,
100 Underground.

Claims (4)

Between the rod-shaped reinforcing material inserted into the hole provided in the plate-like concrete structure so as to extend obliquely to the member axis of the plate-like concrete structure and the inner wall of the hole A filler is provided, the rod-shaped reinforcing material is fixed in the hole so as to extend in a direction obliquely intersecting the member axis of the plate-like concrete structure , and the plate-like concrete structure is The rod-shaped reinforcing material inserted in the hole different from the hole provided so as to obliquely intersect the member axis and extend in the direction intersecting with the extending direction of the hole is different from the rod-shaped reinforcing material. A filler is provided between the reinforcing material and the inner wall of the other hole, and the other bar-shaped reinforcing material obliquely intersects the member axis of the plate-like concrete structure and the rod-shaped reinforcing material To extend in the direction that intersects the extension direction Shear reinforcement structure of the plate-like concrete structure, characterized in that fixed to the serial another hole.   The plate-like concrete structure is a wall of a box culvert installed in the ground, and the hole is a hole formed in the wall of the box culvert from the inner space side of the box culvert. Shear reinforcement structure for plate-like concrete structures.   The plate-like concrete structure is a wall of a box culvert installed in the ground, and the hole is a hole formed in the wall of the box culvert from the upper end surface of the box culvert wall. The shear reinforcement structure of the plate-shaped concrete structure of description.   Between the rod-shaped reinforcing material inserted into the hole provided in the plate-like concrete structure so as to extend obliquely to the member axis of the plate-like concrete structure and the inner wall of the hole A shear reinforcement structure for a plate-like concrete structure provided with a filler and fixed in the hole so that the rod-like reinforcement extends in a direction obliquely intersecting the member axis of the plate-like concrete structure Because
  A plate-like concrete structure, wherein the plate-like concrete structure is a wall of a box culvert installed in the ground, and the hole is a hole formed in the box culvert wall from the upper end surface of the box culvert wall Shear reinforcement structure.

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