JP6460952B2 - Joining structure and joining method - Google Patents

Description

  The present invention relates to a precast block joining structure and joining method.

  In recent years, from the viewpoint of efficiency of construction and the like, structures are often constructed by joining precast blocks made of reinforced concrete. In order to join the precast blocks, for example, in a state where the reinforcing bars protruding from both the precast blocks are joined by mechanical joints, the interstitial concrete is placed in the interstices between the two precast blocks.

  In patent document 1, when connecting the precast concrete foundations, after arranging the end surfaces of the foundations to face each other, the connecting reinforcing bars are arranged so as to straddle the grooves provided in the foundations. Fill with mortar. The reinforcing bars of the foundation are exposed in this groove, and a lap joint is formed by the reinforcing bars and the connecting reinforcing bars when the foundations are connected.

Japanese Patent Laid-Open No. 9-177092

  When connecting a reinforcing bar protruding from a precast block with a mechanical joint, an allowable error of the reinforcing bar position is small, and it is necessary to manufacture and install the precast block with high accuracy. Furthermore, when the reinforcing bar diameter is increased, it is necessary to increase the length of the reinforcing bar protruding from the precast block, which makes it difficult to transport and install the precast block.

  Further, if the joint positions are aligned when the precast blocks are joined, the redundancy as the joining structure cannot be ensured if a failure occurs in the joint. The method of Patent Document 1 does not require a mechanical joint and improves the workability problem described above. However, such a redundancy problem has not been considered.

  The present invention has been made in view of the above problems, and an object of the present invention is to provide a precast block joint structure or the like that can easily form a joint structure and ensure the redundancy of the joint structure.

  1st invention for solving the subject mentioned above has two or more grooves which open to an end face and the side surface following the end face, and a plurality of the grooves differ in length in the side face, and are along each groove. The joint structure of the precast block in which the reinforcing bars are embedded, the end faces of the pair of precast blocks are opposed to each other, the longer groove of one blur cast block and the shorter groove of the other precast block And the position of the shorter groove of one of the precast blocks and the position of the longer groove of the other precast block correspond to each other, and the long groove and the short groove at the corresponding positions of the pair of precast blocks A joint structure is characterized in that joint reinforcing bars are arranged inside both grooves so as to straddle, and fillers are filled in both grooves.

  It is desirable that the reinforcing bars are arranged so as not to protrude from the end face. It is also desirable that the reinforcing bar is exposed inside the groove. Furthermore, it is desirable that a groove reinforcing portion is provided around the groove.

  It is desirable that a fixing member is provided at an end of the reinforcing bar on the end face side. It is also desirable that a fixing member is provided at the end of the joint reinforcing bar.

  2nd invention has several groove | channels opened to the end surface and the side surface following the said end surface, The said groove | channel differs in the length in the said side surface, and the precast by which the reinforcing bar is embed | buried along each groove | channel A block joining method, wherein the end faces of a pair of precast blocks are opposed to each other, the position of the longer groove of one of the precast blocks and the shorter groove of the other precast block, and the position of one of the precast blocks. The step of making the short groove of the cast block correspond to the position of the long groove of the other precast block, and both the grooves so as to straddle the long groove and the short groove at the corresponding positions of the pair of precast blocks A joint rebar is disposed inside, and a filling material is filled inside both grooves.

  In the present invention, the end faces of the precast blocks having grooves of different lengths are arranged to face each other, so that the positions of the long grooves of one precast block and the short grooves of the other precast block correspond to each other. The position of the short groove and the long groove of the other precast block are made to correspond. By inserting the joint reinforcing bars into the grooves at the corresponding positions and filling the grooves, lap joints were formed between the joint reinforcing bars and the reinforcing bars in the block, and the joint positions were shifted in a staggered manner. A junction structure can be formed.

  By shifting the joint position, it is possible to ensure the redundancy of the joint structure, and in the present invention, it is not necessary to protrude the reinforcing bar from the precast block, and there is no need for a mechanical joint, etc. The joint structure can be constructed, and the precast block can be easily transported and installed.

  In addition, if the reinforcing bar is exposed inside the groove, a high-strength lap joint can be formed, and the strength of the joint part can be further increased by reinforcing the periphery of the groove or by providing a fixing body at the end of the reinforcing bar or joint reinforcing bar. You can also.

  According to the present invention, it is possible to provide a precast block joint structure or the like that can easily form a joint structure and ensure the redundancy of the joint structure.

Diagram showing block 1 Diagram showing block 1 Diagram showing block 1 ' The figure which shows the joining method of block 1, 1 ' The figure which shows the cross section of block 1, 1 ' The figure which shows the joining method of block 1, 1 ' The figure which shows the cross section of block 1, 1 ' The figure which shows the joining method of block 1, 1 ' The figure which shows the cross section of block 1, 1 ' The figure which shows the block 1a, 1b, 1c and the joining structure 10a Diagram showing blocks 1d and 1e

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the drawings.

(1. Precast block 1)
FIG. 1 is a perspective view showing a precast block 1 (hereinafter sometimes referred to as a block) according to an embodiment of the present invention. 2A is a diagram showing the upper surface of the block 1, and FIGS. 2B and 2C are diagrams in the height direction along lines aa and bb in FIG. 2A, respectively. It is sectional drawing.

  As shown in FIGS. 1 and 2, the block 1 of the present embodiment is provided with a plurality of grooves 11 a and 11 b that are open on the top surface (the end surface in the height direction) and the two side surfaces following the top surface. In addition, although the block 1 of this embodiment is a substantially rectangular parallelepiped shape and the upper surface and the side surface are orthogonal, the shape of the block 1 is not restricted to this. The grooves 11a and 11b are provided on the front and rear sides of the block 1 (corresponding to the left and right in FIG. 2A), respectively.

  The grooves 11a and 11b extend in the height direction along the side surface of the block 1 from the upper surface of the block 1 downward. The groove 11a and the groove 11b have different lengths on the side surface of the block, and the groove 11a is longer than the groove 11b. The grooves 11a and 11b are alternately provided along the width direction of the block side surface (corresponding to the vertical direction in FIG. 2A).

  The main body of the block 1 is made of concrete, and a plurality of reinforcing bars 12 are embedded therein. The reinforcing bars 12 are arranged along the grooves 11a and 11b in the length direction on the block side surfaces of the grooves 11a and 11b, respectively. The upper ends of the reinforcing bars 12 are exposed inside the grooves 11a and 11b. The upper end of the reinforcing bar 12 is below the upper surface of the block 1 and does not protrude from the upper surface of the block 1. In addition, the dotted line of FIG. 1 has shown the shape and arrangement | positioning in the block 1 about some groove | channels 11a and the reinforcing bars 12. FIG.

(2. Joining method and joining structure of blocks 1, 1 ')
In this embodiment, the block 1 and the block 1 ′ shown in FIG. 3 are joined to form a joined structure of the blocks 1 and 1 ′. The block 1 ′ in FIG. 3 is the same as the block 1 except that the arrangement of the grooves 11 a and 11 b along the width direction of the side surface of the block is opposite to that of the block 1.

  At the time of joining the blocks 1 and 1 ′, the block 1 ′ is turned upside down as shown in FIG. 4A, and the block 1 ′ is arranged on the upper surface of the block 1 as shown by the arrow A.

  At this time, the lower surface (end surface in the height direction) of the block 1 ′ and the upper surface of the block 1 face each other, and as shown in FIG. 4B, the longer groove 11 a of the block 1 and the shorter groove of the block 1 ′ 11b corresponds to the position of the shorter groove 11b of the block 1 and the position of the longer groove 11a of the block 1 ′.

  FIGS. 5 (a) and 5 (b) are views of the same cross section as in FIGS. 2 (b) and 2 (c) at this time. In this embodiment, no padding portion is provided between the blocks 1 and 1 ′. The upper and lower blocks 1, 1 'have continuous grooves 11a, 11b at corresponding positions.

  Next, as shown by an arrow B in FIG. 6, the joint reinforcing bar 20 is inserted from the outside into the grooves 11 a and 11 b at the positions corresponding to the upper and lower blocks 1 and 1 ′.

  FIGS. 7A and 7B are views of a cross section similar to FIGS. 2B and 2C at this time. The joint reinforcing bar 20 is disposed inside the grooves 11a and 11b so as to straddle the grooves 11a and 11b at the corresponding positions in the upper and lower blocks 1 and 1 '. The length of the joint reinforcing bar 20 is shorter than the total length of the grooves 11a and 11b, and the arrangement of the joint reinforcing bar 20 has a margin and can absorb construction errors.

  After that, as shown in FIG. 8, the fillers 30 such as concrete and mortar are filled in the grooves 11 a and 11 b at the corresponding positions in the upper and lower blocks 1 and 1 ′, and the blocks 1 and 1 ′ are integrated to form a block. 1, 1 'joint structure 10 is formed.

  9 (a) and 9 (b) are views of the same cross section as in FIGS. 2 (b) and 2 (c) at this time, and the lap joint is composed of the reinforcing bar 12 of the blocks 1 and 1 ′ and the reinforcing bar 20 for the joint. Is formed. It can also be seen that the position of the joint reinforcing bar 20 in the height direction differs between the position of the groove 11a and the position of the groove 11b of the block 1, and the joint positions of the blocks 1, 1 'are shifted in a staggered manner.

  In the present embodiment, no padding portion is provided between the blocks 1 and 1 ′, but the blocks 1 and 1 ′ are arranged with a space between the blocks 1 and 1 ′, and a space between the blocks 1 and 1 ′. It is also possible to fill with a filler. However, even in this case, the padding portion may be minimized. Further, if possible, a thermosetting resin, plastic grout or the like may be used for the filler 30, and the filler 30 may be pre-filled and the joint reinforcing bars 20 placed before the curing. Furthermore, the method of this embodiment can also be applied to the case where the blocks 1 and 1 ′ are joined to the left and right instead of the top and bottom.

  As described above, in this embodiment, the end surfaces of the blocks 1 and 1 'having the grooves 11a and 11b having different lengths are arranged to face each other, whereby the long groove 11a of one block 1 and the other block are arranged. The position of the short groove 11b of 1 'is made to correspond, and the position of the short groove 11b of one block 1 and the position of the long groove 11a of the other block 1' are made to correspond. A lap joint is formed between the joint reinforcing bar 20 and the reinforcing bars 12 in the blocks 1 and 1 ′ by inserting the joint reinforcing bars 20 into the corresponding grooves 11a and 11b and filling the grooves 11a and 11b. It is possible to form the joint structure 10 that is formed and whose joint positions are staggered.

  By shifting the joint position, redundancy can be ensured, and in this embodiment, there is no need to project the reinforcing bar 12 from the block 1, no mechanical joint or the like is required, and there is no need to enlarge the stuffing portion. Can be constructed easily, and transportation and installation of the block 1 are easy.

  However, the present invention is not limited to this. For example, as shown in a block 1a in FIG. 10A, a groove reinforcing portion 14 may be provided around the groove 11a (and the groove 11b). The groove reinforcing portion 14 can be formed by providing fiber reinforced concrete, a half-shaped steel pipe or the like around the groove, and has an effect of increasing adhesion by restraining the filler 30 in the groove.

  Further, as shown in a block 1b of FIG. 10B, a reinforcing bar reinforcing portion 15 can be provided around the reinforcing bar 12 to reinforce the reinforcing bar 12. The reinforcing bar reinforcing part 15 is, for example, a spiral bar, a part of the plane is embedded in the block 1b, the remaining part is exposed in the groove, and the reinforcing bar 12 is passed through the exposed part. It is possible to further insert the joint reinforcing bar 20 by increasing the exposed portion. As the reinforcing bar reinforcing portion 15, a steel pipe or the like can be used instead of the spiral reinforcing bar.

  Further, as shown in a block 1c in FIG. 10C, a fixing member 121 having a diameter larger than the diameter of the reinforcing bar may be provided at the upper end portion of the reinforcing bar 12a. Similarly, as shown in the joint structure 10a by the blocks 1c and 1c ′ in FIG. 10 (d), the fixing member 121 is provided at the end of the reinforcing bar 12a of each block body, and the reinforcing bars are provided at both ends of the joint reinforcing bar 20a. A fixing body 201 having a diameter larger than the diameter may be provided. The block 1c 'is the same as the block 1', except that the arrangement of the grooves 11a and 11b along the width direction of the side surface of the block is reversed from that of the block 1c. In addition, when the cover thickness of the fixing members 121 and 201 cannot be ensured, it is possible to use ceramics instead of steel as the fixing members 121 and 201 in order to prevent corrosion.

  10A to 10D, the strength of the joint portion can be increased, and the joint length can be shortened.

  In addition, the reinforcing bar 12 does not necessarily have to be exposed in the groove. For example, the entire reinforcing bar 12 may be embedded in the block 1 as shown in a block 1d of FIG. However, a joint can be formed with high strength by exposing the reinforcing bars 12 inside the grooves 11a and 11b.

  Further, as shown in the block 1e of FIG. 11B, the grooves 11a and 11b may extend in the height direction along the side surface of the block 1 from both the upper surface and the lower surface of the block 1.

  In the example of FIG. 11B, the position of the longer groove 11a extending from the upper surface of the block 1e corresponds to the position of the shorter groove 11b extending from the lower surface, and both end portions of the reinforcing bar 12 are inside these grooves 11a and 11b. Each is exposed. Similarly, the position of the shorter groove 11b extending from the upper surface of the block 1e corresponds to the position of the longer groove 11a extending from the lower surface, and both ends of reinforcing bars (not shown) are exposed inside these grooves 11a and 11b, respectively. . Thereby, one type of block 1e can be piled up and down to form a junction structure.

  The preferred embodiments of the present invention have been described above with reference to the accompanying drawings, but the present invention is not limited to such examples. It will be apparent to those skilled in the art that various changes or modifications can be conceived within the scope of the technical idea disclosed in the present application, and these are naturally within the technical scope of the present invention. Understood.

1, 1 ′, 1a, 1b, 1c, 1d, 1e; precast blocks 10, 10a; joint structures 11a, 11b; grooves 12, 12a; reinforcing bars 14; 30; Filler

Claims (7)

Having a plurality of grooves opened in the end surface and the side surface following the end surface;
The plurality of grooves have different lengths on the side surfaces,
A precast block joining structure in which reinforcing bars are embedded along each groove,
The end faces of the pair of precast blocks face each other, the position of the longer groove of one of the brecast blocks and the shorter groove of the other precast block, and the shorter groove of one of the brecast blocks The position of the longer groove of the other precast block corresponds,
Reinforcing bars for joints are arranged inside both grooves so as to straddle the long groove and the short groove at corresponding positions of the pair of precast blocks,
A joining structure characterized in that a filler is filled in both grooves.   The joint structure according to claim 1, wherein the reinforcing bars are arranged so as not to protrude from the end face.   The joint structure according to claim 1, wherein the reinforcing bar is exposed inside the groove.   The joint structure according to claim 1, wherein a groove reinforcing portion is provided around the groove.   The joining structure according to any one of claims 1 to 4, wherein a fixing body is provided at an end of the reinforcing bar on the end face side.   The joining structure according to claim 1, wherein a fixing body is provided at an end of the joint reinforcing bar. Having a plurality of grooves opened in the end surface and the side surface following the end surface;
The plurality of grooves have different lengths on the side surfaces,
A precast block joining method in which reinforcing bars are buried along each groove,
The end faces of a pair of the precast blocks are opposed to each other, and the position of the longer groove of one of the precast blocks and the shorter groove of the other precast block, and the shorter groove of one of the precast blocks, The step of corresponding the position of the longer groove of the other precast block;
A step of placing joint reinforcing bars inside both grooves so as to straddle the long groove and the short groove at corresponding positions of a pair of the precast blocks, and filling the inside of both grooves with a filler,
A precast block joining method characterized by comprising:

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