Partition member for concrete construction joint

Abstract

To improve the bite between a partition board and concrete cast both before and after compared to the case of the partition board having flat surfaces on both sides.SOLUTION: A partition member for concrete construction joints comprises: a partition board made of precast concrete that is placed, in the case of a concrete structure member extending in one direction, between a concrete part in one side and a concrete part in the other side along one direction in which the casting is performed in different timings; and reinforcement bars protruding from one side and the other side of the partition board. The partition board has concave-shape cotter parts formed on its one side surface, while having roughened areas with wavy rough surfaces formed on the other side surface.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present disclosure relates to a partition member for concrete joints.

Background Art

[0002] The concrete structure construction device described in Patent Document 1 divides a plurality of concrete driving spaces in the lateral direction, allows concrete to be driven for each divided driving space, and constructs a continuous concrete structure in the lateral direction by connecting the contact surfaces of the concrete driven for each driving space. It includes a vertical formwork installed at intervals on the front and back surfaces of the driving space, vertical and horizontal reinforcing bars arranged within the intervals, and an embedded member installed on the vertical contact surface of laterally adjacent driving spaces. The embedded member has a closing plate and a connecting bar inserted and attached to the closing plate. The closing plate is configured as a plate-shaped member forming a substantially rectangle to block the vertical contact surface of the driving space, and both surface portions are configured as rough surfaces. The connecting bar and the horizontal reinforcing bar are configured to be connectable. Concrete is driven into laterally adjacent driving spaces, and the adjacent concretes are integrated via the embedded member.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] When the placement of concrete is not completed at once, or when it is desired to change the specifications of the concrete, etc., in some cases, concrete may be placed later in a continuous manner on the previously placed and already hardened concrete to divide the concrete.

[0005] Conventionally, for the part where concrete is placed separately, a concrete partition board with reinforcing bars embedded in advance is used. And, recesses are not provided on both sides of this partition board, and both sides of the partition board are flat. For this reason, the adhesion between the concrete placed first, the concrete placed later, and the partition board was poor.

[0006] The problem of the present disclosure is to improve the adhesion between the concrete placed first, the concrete placed later, and the partition board as compared with the configuration in which both sides of the partition board are flat.

Means for Solving the Problem

[0007] The partition member for concrete joint according to the first aspect is a precast concrete partition board disposed between a concrete portion on one side in one direction and a concrete portion on the other side in one direction that are placed at different timings in a concrete structural member extending in one direction, and reinforcing bars protruding from one side and the other side of the partition board. A concave cotter portion is formed on one side plate surface of the partition board, and a roughened portion roughened in a wave shape is formed on the other side plate surface of the partition board.

[0008] According to the above aspect, a concave cotter portion is formed on one side plate surface of the partition board, and a roughened portion roughened in a wave shape is formed on the other side plate surface of the partition board. Thereby, as compared with the configuration in which both sides of the partition board are flat, the adhesion between the concrete placed first, the concrete placed later, and the partition board can be improved.

[0009] The partition member for concrete joint according to the second aspect is the partition member for concrete joint according to the first aspect, wherein the reinforcing bar is joined to the main reinforcing bar constituting the structural member by a mechanical joint.

[0010] According to the above aspect, the reinforcing bar is joined to the main reinforcing bar by a mechanical joint. Thereby, the reinforcing bar protruding from the partition board can be reliably joined to the main reinforcing bar.

[0011] The partition member for concrete joint according to the third aspect is used for the concrete joint of the foundation beam in the partition member for concrete joint described in the first or second aspect.

[0012] According to the above aspect, the partition member is used for the concrete joint of the foundation beam. Thereby, the biting between the concrete placed first and the concrete placed later that constitute the concrete of the foundation beam and the partition plate can be improved.

Effect of the Invention

[0013] According to the present disclosure, compared with the configuration in which both surfaces of the partition plate are flat, the biting between the concrete placed first and the concrete placed later and the partition plate can be improved.

Brief Description of the Drawings

[0014]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Mode for Carrying Out the Invention

[0015] An example of a partition member for concrete joint placement according to an embodiment of the present disclosure will be described with reference to FIGS. 1 to 5. The arrow H shown in each figure indicates the vertical direction, which is the vertical direction, the arrow W shown in each figure is orthogonal to the arrow H and is in the horizontal direction, and the arrow D shown in each figure is orthogonal to the arrows H and W and is in the horizontal direction.

[0016] This partition member for concrete joint placement is used to place concrete later in a continuous manner with respect to the previously placed and already hardened concrete part when the placement of concrete is not completed at once, when it is desired to change the concrete specifications, etc.

[0017] (Overall structure) The partition member 10 for concrete joint placement (hereinafter simply referred to as "partition member 10") includes a partition plate 12 made of precast concrete and reinforcing bars 40 passing through the four corner portions of the partition plate 12, as shown in FIGS. 1 and 2.

[0018] [Partition plate 12] As shown in FIGS. 1 and 2, the partition plate 12 is rectangular when viewed from the plate thickness direction, and a front surface 12a and a back surface 12b are formed on the partition plate 12. The front surface 12a is an example of one side plate surface, and the back surface 12b is an example of the other side plate surface.

[0019] As shown in FIG. 1, a roughened portion 14 roughened in a wave shape is formed on the front surface 12a of the partition plate 12. The roughened portion 14 is a so-called roughening for concrete, and is a portion where fine streaks are formed on the surface using a broom or a brush before the concrete hardens. In FIG. 1, the roughened portion 14 is shown to be formed partially, but the roughened portion 14 is formed over the entire front surface 12a of the partition plate 12. Here, the roughened portion 14 is a portion where a plurality of grooves having a depth of 2 mm or more are formed at intervals.

[0020] Further, as shown in FIG. 2, two concave cotter portions 16 are formed side by side in the vertical direction on the back surface 12b of the partition plate 12. The cotter portion 16 is rectangular in shape extending in the depth direction when viewed from the width direction (plate thickness direction).

[0021] [Construction method of partition member for concrete joint]] Next, the construction method of the partition member 10 will be described for the case of placing concrete to form a foundation beam extending in the width direction. The foundation beam extending in the width direction is an example of a concrete structural member extending in one direction.

[0022] First, with a beam formwork (not shown) installed, as shown in FIG. 3, the partition member 10 is installed between the main reinforcing bars 46 that form the foundation beam formed between a pair of columns 44. Specifically, the partition member 10 is installed such that the reinforcing bar 40 and the formwork etc. face each other in the width direction between the main reinforcing bar 46a extending from one column 44a and the main reinforcing bar 46b extending from the other column 44b. Note that in FIG. 3, stirrups etc. are shown omitted.

[0023] Next, a sleeve pipe 42 is installed so as to straddle the end of the main reinforcing bar 46a and one end of the reinforcing bar 40, and further, a sleeve pipe 42 is installed so as to straddle the end of the main reinforcing bar 46b and the other end of the reinforcing bar 40.

[0024] Next, as shown in FIG. 4, grout is injected from the injection holes 42a of each sleeve pipe 42. Specifically, grout is injected into the injection hole 42a until grout is discharged from the discharge hole 42b of the sleeve pipe 42. In this way, the reinforcing bar 40 is joined to the main reinforcing bars 46a and 46b by a mechanical joint. Note that a seal member (reference numeral omitted) for suppressing the leakage of grout between the reinforcing bars 40 and 46 and the sleeve pipe 42 is provided.

[0025] Next, concrete is placed in the portion between the column 44a shown in FIG. 3 and the partition plate 12, and after this concrete portion has hardened, other concrete is placed in the portion between the column 44b and the partition plate 12.

[0026] In this way, the partition member 10 is constructed, and a foundation beam is formed between the pair of columns 44.

[0027] [Manufacturing formwork for the partition plate 12] As shown in FIG. 5(A), the formwork 48 for manufacturing the partition plate 12 includes a frame portion 48a and a bottom portion 48b. The bottom portion 48b is provided with a convex portion 48c for forming the concave cotter portion 16 (see FIG. 2) and a cylindrical hole 48d into which one side portion of the reinforcing bar 40 attached to the partition plate 12 is inserted.

[0028] When the reinforcing bar 40 is set in this formwork 48 and concrete is poured, a flat surface with a flattened upper surface is formed as shown in FIG. 5(B). By roughening this flat surface, a roughened portion 14 (see FIG. 1) is formed.

[0029] (Summary) As described above, in the partition member 10, a roughened portion 14 is formed on the surface 12a of the partition plate 12, and a concave cotter portion 16 is formed on the back surface 12b of the partition plate 12. Thereby, compared with the configuration in which both surfaces of the partition plate are flat, the biting between the previously placed concrete and the subsequently placed concrete and the partition plate 12 can be improved.

[0030] Also, in the partition member 10, the reinforcing bar 40 is joined to the main reinforcing bars 46a and 46b by a mechanical joint. Thereby, the reinforcing bar 40 protruding from the partition plate 12 can be reliably joined to the main reinforcing bars 46a and 46b.

[0031] Also, in the partition member 10, the partition member 10 is used for the concrete joint of the foundation beam. Thereby, the biting between the previously placed concrete and the subsequently placed concrete constituting the foundation beam and the partition plate can be improved.

[0032] Although the present disclosure has been described in detail with respect to specific embodiments, it is obvious to those skilled in the art that the present disclosure is not limited to such embodiments and that various other embodiments can be adopted within the scope of the present disclosure. For example, although four reinforcing bars 40 are provided on the partition plate 12, the number of reinforcing bars may be four or less, or four or more.

[0033] In addition, in the above embodiment, although not particularly described, the beam into which the concrete is poured may be a beam other than the foundation beam, such as another beam.

[0034] In addition, in the above embodiment, although the rough portion 14 is formed on the front surface 12a of the partition plate 12 and the concave cotter portion 16 is formed on the back surface 12b of the partition plate 12, concave cotter portions may be formed on both surfaces of the partition plate.

Explanation of Reference Numerals

[0035] 10 Partition member 12 Partition plate 12a Front surface (an example of one side plate surface) 12b Back surface (an example of the other side plate surface) 14 Rough portion 16 Cotter portion 40 Reinforcing bar 46 Main reinforcing bar 46a Main reinforcing bar 46b Main reinforcing bar

Claims

1. In a structural member made of concrete extending in one direction, a precast concrete partition plate is disposed between a concrete portion on one side in the one direction and a concrete portion on the other side in the one direction that are poured at different times; A reinforcing bar protruding from one side and the other side of the partition plate, A concave cotter portion is formed on one side of the plate surface of the partition plate, A roughened portion that is roughened in a wavy shape is formed on the plate surface on the other side of the partition plate. Partition material for concrete joints.

2. The reinforcing bar is joined to the main bar constituting the structural member by a mechanical joint. A partition member for concrete joints according to claim 1.

3. Used for pouring concrete joints for foundation beams. A partition member for concrete joints according to claim 1 or 2.

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