JPH07116743B2 - Concrete block connection method and thin plate used for it - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION The present invention is preferably used when joining concrete blocks such as so-called box culverts and providing sewers, headraces, drainage channels, underpasses, common ditches or water tanks underground. The present invention relates to a concrete block connecting method.

[0002]

2. Description of the Related Art When a plurality of concrete blocks such as box culverts are joined to construct the above-mentioned sewer system, it is customary to lay a mortar on a foundation concrete placed at the bottom of an excavation hole or the like. . Then, recently, a deformable thin plate is interposed between the floor mortar and the concrete block, and when the concrete blocks are tightened and joined together by a tensioning material, the uncured mortar is under the concrete block. A construction method has been developed to prevent the occurrence of the problem that a large amount of bits are caught between the joint end faces due to being scooped up by the edge corners.

[0003]

However, it is difficult to actually suspend the concrete block by a crane in the excavation hole and align the concrete block so as to accurately approach the joint end of the already laid concrete block. There is a gap between the concrete block and the suspended concrete block. And
If this gap is too large, problems tend to occur when the tension blocks are used to tighten the concrete blocks together in the procedure described below.

An object of the present invention is to eliminate such a problem.

[0005]

The present invention takes the following means in order to achieve such an object.
That is, the connection method of the concrete block according to the present invention, a deformable thin plate is laid on the laying mortar that is cast on the basic concrete, and a plurality of concrete blocks that are mutually connected on this thin plate are sequentially laid, Before hardening the floor mortar, it is a construction method in which these concrete blocks are tightly connected to each other with a tension material, and a slit for thrusting the burl on the basic concrete in the thin plate laying region at the joint position of each concrete block is provided. When the concrete block to be laid is placed near the joint end of the already laid concrete block, the released joint end side of the concrete block to be laid is placed through the slit to form the basic concrete. To push with the bar that is thrust up I, wherein the aligning the concrete block to be the laying already moved to the laid concrete blocks direction.

In order to be able to insert a burl into a desired slit as appropriate, it is desirable that a plurality of slits are provided at intervals in a direction orthogonal to the concrete block connecting direction. The slit may be a long hole formed in a thin plate or a gap formed between a plurality of thin plates separated from each other.

As a thin plate which is particularly preferably used when carrying out such a connecting method, a thin plate having a plurality of long hole-shaped slits which are formed substantially parallel to each other at predetermined intervals is mentioned. be able to.

[0008]

According to the present invention, the concrete block to be laid is suspended in the vicinity of the laid concrete block, and then the bar pierced on the basic concrete through the slit is rotated, Since the lower edge of the joint end on the release side of the concrete block to be laid is pressed, the concrete block to be laid should be moved in the direction of the already laid concrete block without difficulty, and a large gap should be created between the concrete blocks. Can be aligned so that there are no gaps. Therefore, it becomes possible to smoothly proceed the tightening and joining work using the tension material. If a plurality of slits are provided at intervals in the direction orthogonal to the concrete block joining direction, it is possible to insert a burl into a desired slit as needed to correct the posture of the concrete block.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS.

FIG. 1 is a perspective view showing box culverts 1 and 2 which are concrete blocks to be joined.
The box culverts 1 and 2 are precast box-shaped ones, each of which has a hole 12 penetrating from one joint end face 1a, 2a to the other joint end face 1b, 2b at four corners. In the middle of each through hole 12 of No. 1, a connecting concave portion 13 opening to the inner surface of the culvert 1.
Is provided. A joint rubber 14 is provided on the joint end faces 1a, 1b, 2a, 2b of the box culverts 1, 2. And these box culverts 1,2
After being manufactured in a factory or the like, it is brought into the field. In the field, first, the ground 3 is excavated, and the foundation stone 4 and foundation concrete 5 are placed on the bottom of the foundation 3. Then, the floor mortar 6 is placed on the foundation concrete 5, and a deformable thin plate 7 is laid at a required position on the floor mortar 6.

The thin plate 7 is made of a metal plate such as galvanized iron or a plastic plate, and has a plurality of elongated slits 71 parallel to each other at a predetermined interval in a direction orthogonal to the connecting direction of the box culverts 1 and 2. The box culverts 1 and 2 are laid on the upper surface of the floor mortar 6 to be joined.

Then, on the laying area of the thin plate 7 in which the slit 71 is present, the joining end surface 1 of the box culverts 1 and 2 is formed.
The box culverts 1 and 2 are sequentially placed and aligned so that a, 1b, 2a and 2b are located.

More specifically, when laying the box culverts 1 and 2, first, as shown in FIG.
The thin plate 7 is laid on the thin plate 7, and the box culvert 2 is arranged on the thin plate 7. At this time, the thin plate 7 is arranged so that a plurality of slits 71 formed at intervals in a direction orthogonal to the connecting direction of the box culvert 2 are located below the released joint end surface 2b of the box culvert 2. Then, the box culvert 2 is hung by a crane or the like and placed on the thin plate 7. And floor mortar 6
By pressing the box culvert 2 by means of the burl 8 which is pierced on the foundation concrete 5 through the slit 71 before hardening of the above, the box culvert 2 to be laid is brought close to the box culvert 1 ′ already laid or Abut. Next, as shown in FIG. 3, the box culverts 1 are laid, but the same procedure as the laying of the box culverts 2 described above is performed, and a plurality of holes are bored at intervals in the direction orthogonal to the connecting direction of the box culverts 1. The provided slit 71 is the box culvert 1
Of the thin plate 7 so as to be located below the released joint end face 1b of
And the box culvert 1 is placed on the thin plate 7. Then, before hardening the floor mortar 6, pressing the lower edge portion 1c of the joint end face 1b on the release side of the box culvert 1 to be laid by the burl 8 which is erected on the basic concrete 5 through the slit 71. Thus, the box culvert 1 to be laid is moved in the direction of the already laid box culverts 1 ′ and 2 ′ so as to approach or abut the box culvert 2. Thereafter, as shown in FIG. 4, these box culverts 1 and 2 are tightly joined to each other by using PC steel material 11 as a tension material, and at the same time, they are connected to the already installed box culverts 1 and 2.

A method for tightly joining the box culverts 1 ', 2', 1 and 2 together is disclosed in, for example, Japanese Patent Laid-Open No. 5-1129.
According to the connection construction method described in Japanese Patent Publication No. 82-82. That is, as shown in FIG. 5, the culverts 1 ′ and 2 ′ that have already been installed are adjacent to the culverts 1 and 2 that are to be installed, and the insertion holes that are open to the other end surface side A of the culverts 1 and 2 that are to be installed. PC steel material 1 on culvert 1'installed from 12
Insert 1. Then, the one-end screw portion 11a of the PC steel material 11 is positioned in the connecting recess 13 of the culvert 1'which has been laid, and the other-end screw portion 11b is placed in the connecting recess 13 of the culvert 1 to be installed. Position it.

Next, in the connecting recess 13 of the culvert 1 to be laid, a nut 18 is provided on the other end threaded portion 11b of the PC steel material 11 as shown in FIG. The threaded portion corresponding to approximately half the length of the connector 17 is attached in a state where it is secured for safety, and FIG.
As shown in, the connector 17 is screwed to the tip thread portion of the other end thread portion 11b.

Further, as shown in FIG. 7, in the connecting recess 13 of the installed culvert 1 ', the PC steel material 11 is formed.
The nut 14 is screwed and fixed to the threaded portion 11a at one end thereof, and the tension rod 15 is inserted into the connecting concave portion 13 of the culvert 1 from the other end surface side A of the culverts 1 and 2 to be laid.
Insert one end 15a of the tension rod 15 into the connector 1
7, a thread portion corresponding to approximately half the length of the connector 17 is secured and screwed, and the other ends 15b of the tension rods 15 are to be laid. It is carried by the hydraulic jack 16 arranged at A.

By the cooperation of the hydraulic jack 16 and the tension rod 15, as shown in FIG. 8, a tension force is applied to the PC steel material 11 so as to lay it on the culverts 1 ', 2'sides already laid. The culverts 1 and 2 are pressed, and the other end 11 of the PC steel material 11 is maintained while maintaining the tension state of the PC steel material 11.
The nut b is fixed in the connecting concave portion 13 of the culvert 1 to be laid by the nut 18.

Then, the connector 17 and the tension rod 15 are connected.
Is removed from the PC steel material 11 by removing,
Remove the hydraulic jack 16. By such work, the box culverts 1 ', 2', 1, 2 are joined together in a tightened state.

With such a structure, the box culverts 1 and 2 to be laid are successively hung near the laid box culverts 1'and 2 ', and a slit is provided each time the box culverts are hung. By rotating the burl 8 pierced on the foundation concrete 5 via 71,
The box culverts 1 and 2 to be laid are pressed by pressing the joint end surfaces 1b and 2b on the release side of the box culverts 1 and 2 to be laid.
Can be moved in the direction of the already installed box culverts 1 ', 2', and can be closely aligned.

The shape of the slit is not limited to that of the embodiment described above. For example, a slit-like shape 171 formed between a plurality of separated thin plates 107 as shown in FIG. But it's okay. When applied to a large concrete block, as shown in FIG.
A plurality of the thin plates 7 having the long hole-shaped slits 71 may be adjacently used. Besides, various modifications can be made without departing from the spirit of the present invention.

Further, in the above embodiment, the box culverts 1, 1 ', 2 are provided via the box culverts 2 having no connecting recesses between the box culverts 1, 1'having the connecting recesses 13. Although the boxes are connected to each other, the number of the box culverts 2 having no connecting concave portion may be two or more, or the box culverts 1 and 1 ′ having the connecting concave portion 13 may be directly connected to each other. .

Further, the method of connecting the box culverts to each other is not limited to the above embodiment, and various modifications can be made without departing from the spirit of the present invention.

Further, in the above embodiment, the case where the concrete block is a box culvert for forming a culvert such as a sewer has been described, but the present invention is not necessarily limited to such a case. It may be a concrete block for constructing a water storage tank, a prefabricated press cast garage, or the like.

[0024]

EFFECTS OF THE INVENTION Since the present invention has the above-described structure, the concrete block to be laid is suspended in the vicinity of the laid concrete block and then pierced on the basic concrete through the slit. Rotate to press the lower edge of the joint end on the release side of the concrete block to be laid, and move the concrete block to be laid in the direction of the already laid concrete block to align it closely. Therefore, it is possible to prevent a gap from being generated between the laid concrete block and the concrete block to be laid, and it is possible to smoothly perform the tightening and joining work using the tension material. That is, according to the present invention, although the floor mortar is provided with a thin plate for preventing a large amount of bite between the joint end faces, the concrete block immediately after being hung is moved by the burl to remove the concrete blocks from each other. It is possible to arrange so that no large gap remains between them, and it is possible to obtain the effect that the tightening and joining work of the concrete blocks can be carried out smoothly.

Furthermore, by providing a plurality of slits at intervals in the direction orthogonal to the concrete block joining direction, it is possible to correct the posture of the concrete block by appropriately inserting burls into the desired slits. Figure 1
-By using a thin plate as shown in the embodiment of Fig. 8 or the embodiment of Fig. 10, such slits can be accurately positioned and formed quickly and reliably.

[Brief description of drawings]

FIG. 1 is a perspective view showing an embodiment of the present invention.

FIG. 2 is an operation explanatory view of the same embodiment.

FIG. 3 is an operation explanatory view of the same embodiment.

FIG. 4 is a schematic side sectional view showing the embodiment.

FIG. 5 is a schematic process explanatory view of the embodiment.

FIG. 6 is a schematic process explanatory view of the embodiment.

FIG. 7 is a schematic process explanatory view of the embodiment.

FIG. 8 is a schematic process explanatory view of the embodiment.

FIG. 9 is a perspective view showing another embodiment of the present invention.

FIG. 10 is a perspective view showing still another embodiment of the present invention.

[Explanation of symbols]

 1,2,1 ', 2' ... Concrete block 1a, 1b, 2a, 2b ... Joining end face 1c, 2c ... Lower edge part 3 ... Ground 4 ... Foundation Kuriishi 5 ... Foundation concrete 6 ... Floor mortar 7, 107 ... Thin plate 8 ... Burl 9 ... Joint rubber 11 ... Tension material 11a ... One end screw part 11b ... Other end screw part 12 ... Insertion hole 13 ... Connection concave part 14, 18 ... Nut 15 ... Tension rod 15a ... Insertion end 15b ... Other end 16 ... Hydraulic jack 17 ... Connectors 71,171 ... Slit

Claims (5)

[Claims] 1. A deformable thin plate is laid on a floor mortar cast on a foundation concrete, and a plurality of concrete blocks interconnected with each other are sequentially laid on the thin plate, and before the floor mortar is hardened. It is a construction method in which each concrete block is tightly connected with a tension material, and a slit for piercing the bar on the concrete foundation is provided in the thin plate laying region at the joining position of each concrete block, and the concrete that has already been laid At the stage where the concrete block to be laid near the joint end of the block is placed, the released joint end side of the concrete block to be laid is pressed by the burl piercing the foundation concrete through the slit. The concrete block to be laid by Connecting method of the concrete blocks, characterized in that to the already aligned is moved to laid concrete blocks direction. 2. The method for connecting concrete blocks according to claim 1, wherein a plurality of slits are provided at intervals in a direction orthogonal to the concrete block connecting direction. 3. The method for connecting concrete blocks according to claim 1, wherein the slit is an elongated hole formed in a thin plate. 4. The method for connecting concrete blocks according to claim 1, wherein the slit is a gap formed between a plurality of thin plates separated from each other. 5. A thin plate directly used in the method for connecting concrete blocks according to claim 3, wherein a plurality of long hole-shaped slits are provided in parallel at a predetermined interval. A thin plate characterized by.