JP3450272B2 - Retaining wall block - Google Patents

Description

Detailed Description of the Invention

[0001]

TECHNICAL FIELD The present invention relates to a concrete such as a retaining wall.
A retaining wall block used when constructing a roof structure .

[0002]

2. Description of the Related Art Concrete blocks used for constructing concrete structures such as beams, retaining walls, underdrains and waterways have the purpose of improving work efficiency, accuracy and quality control.
It is produced outside the construction site. However, in the case where the block itself is large and heavy or has a complicated shape, the work load and cost for transportation increase, and a large storage space is required.

Therefore, in recent years, a method has been adopted in which the concrete block is divided and manufactured in advance, and the divided block is carried into a construction site and connected as necessary. For example, as shown in FIG. 44, an underdrain block having a predetermined shape is divided into upper and lower parts in advance and manufactured, and the divided blocks 201 and 202 are connected at a construction site.

Recesses 201a and 202a are formed at intervals on the side surfaces of the end portions of the divided blocks 201 and 202 on the side of the connecting surface. In addition, each recess 201a,
Ends 201b and 202b of the internal reinforcing bars embedded in the block are exposed in 202a.

When connecting the divided blocks 201 and 202, the two divided blocks 201 and 202 are assembled as shown in the figure with a packing (not shown) interposed therebetween. Then, the reinforcing bar ends 201b and 202b facing each other are individually welded to integrate the two divided blocks 201 and 202.

[0006]

However, in the above-described connecting method, since it takes 5 to 10 minutes to weld each location, a series of connecting operations is completed even if a plurality of welding operators are used. It takes a considerable amount of time before welding, and variations in welding quality are likely to occur due to environmental conditions and the ability of workers.

Further, the end portions 201b and 202b of the internal rebar are
Since they are simply welded together, the packing cannot be pressed sufficiently during connection. That is, it is difficult to connect the two divided blocks 201 and 202 in a proper pressure contact state with the packing sandwiched therebetween, and it is difficult to secure desired airtightness and watertightness.

The present invention was created in view of the above circumstances, and an object of the present invention is to provide a retaining wall block capable of firmly connecting concrete blocks in a proper pressure contact state.

[0009]

In order to achieve the above object, the invention according to claim 1 provides two or more concrete blocks.
And the adjacent first and second contacts.
Retaining wall block constructed by connecting cleat blocks
And a plurality of openings having openings on the connecting surface side and the side surface side.
The first concrete block with a recess and the tip end
Make sure that the removed male screw part is exposed in each of the recesses.
Multiple first connections embedded in one concrete block
Rod and a plurality of recesses having openings on the connecting surface side and the side surface side
With corresponding to the recess of the first concrete block
2 Concrete block and male screw on the tip
Second concrete so that the parts are exposed in each of the recesses
A plurality of second connecting rods embedded in the block;
Center the female screw hole where the male thread on the tip of the connecting rod can be screwed
And has a male screw part on the outer surface and a female screw hole
The first connecting rod is screwed into the male thread of the tip of the connecting rod.
A first tightening member attached to each
Center the insertion hole with a diameter slightly larger than the outer diameter of the connecting rod
And screwed onto the external male thread of the first tightening member
It has a female screw hole that can be
By inserting the through hole into the male thread on the tip of the second connecting rod
A second tightening member covering each of the second connecting rods;
After covering the second connecting rod with the second tightening member,
The second connecting lock can be obtained by screwing the male thread on the tip of the connecting rod.
Is attached to each of the
Directs toward the tip of the second connecting rod of the second tightening member by contact.
A nut for restricting movement in the rake direction,
Between the connecting surface of the REIT block and the second concrete block
After combining the connecting surfaces so that the recesses of the
And a second tightening member covering the second connecting rod.
Rotate to attach the female screw hole to the first connecting rod
Screwed onto the external male thread of the first tightening member
The second connecting rod among the connecting rods that are tightened and face each other.
Through the nut that abuts the step of the second tightening member.
Pull the 1st connecting rod in the direction of 1st connecting rod
Pulled toward the second connecting rod via the first tightening member
By connecting the first concrete block and the connecting surface
The connecting surface of the second concrete block is in pressure contact,
1, the concave part of the second concrete block is each concrete
A plurality of blocks are provided on each of the inner and outer surfaces of the block .
Pull with the first and second concrete blocks connected.
The number of recesses on the surface where the tension force acts is the surface where the compression force acts
More than the number of recesses on the side,
The same thickness as the connecting rod on the side where the compressive force acts
The first tightening member and the first nut are used.
And a second tightening member and a second nut
The same size connector is used, and the first
At the end of the external thread of the tightening member,
The external thread portion of the member and the female screw hole of the second tightening member
Face the end face of the second tightening member in the screwed and tightened state.
A ring collar that fits is provided to connect the first tightening member to the first connection.
Before covering the rod, screw it into the male thread on the tip of the first connecting rod.
The first connecting rod is attached to each of the first connecting rods.
The first tightening member after tightening is fixed by the fixing nut.
Fixed, before the second fastening member is covered with the second connecting rod.
To the second male threaded portion of the second connecting rod
By the second fixing nut attached to each connecting rod
After tightening the second tightening member,
And are characterized.

The invention according to claim 2 has two or more cores.
Combining concrete blocks into an approximately L shape and adjoining
Constructed by connecting the first and second concrete blocks
Retaining wall block that has been opened on the connecting surface side and the side surface side.
First concrete block having a plurality of recesses having
And the male thread on the tip is exposed in each recess.
The compound embedded in the first concrete block so that
With several first connecting rods and openings on the connecting surface side and the side surface
A plurality of recesses that correspond to the recesses of the first concrete block.
The second concrete block prepared accordingly, and installed at the tip
Make sure that the removed male screw part is exposed in each of the recesses.
Multiple second connections embedded in 2 concrete blocks
The rod and the male thread on the tip of the first connecting rod can be screwed together.
Having a female screw hole in the center and a male screw part on the outer surface,
The female screw hole can be screwed into the male thread on the tip of the first connecting rod.
First tightening attached to each first connecting rod with and
Member and diameter slightly larger than the outer diameter of the second connecting rod
Having an insertion hole in the center and an outer surface of the first tightening member
There is a step between the female screw hole that can be screwed into the male screw part and the insertion hole.
Has a through hole in the male thread of the tip of the second connecting rod.
The second tightening that covers each second connecting rod by inserting
Attach the mounting member and the second tightening member to the second connecting rod.
And then screw it into the male thread on the tip of the second connecting rod.
Is attached to each second connecting rod with
Second connection of the second tightening member by contact with the step of the material
Equipped with a nut that restricts movement in the direction toward the rod tip.
Well, the connecting surface of the first concrete block and the second concrete block
Assemble the connecting surfaces of the base blocks so that the recesses
After fitting, the second connecting rod covers the second
Rotate the tightening member so that its female screw hole is
External thread of the first tightening member attached to the cable
Of the connecting rods facing each other.
2 Attach the connecting rod to the step of the second tightening member.
The first connecting rod in the direction of the first connecting rod and
The connecting rod is connected to the second connecting rod via the first tightening member.
The first concrete block by pulling in the direction
The connection surface of the second concrete block and the connection surface of the second concrete block are pressed together
The concave parts of the first and second concrete blocks are
Multiple pieces are provided on each of the inner and outer surfaces of the concrete block.
And the first and second concrete blocks are connected.
The number and the compressive force of the recesses tensile forces in the state of be that side effects were
Has the same number of recesses on the surface side, and the pulling force is
The surface side that acts on the connecting lock is more than the side that acts on the compressive force.
A thick one is used as the terminal and the first tightening part
Material, first nut, second tightening member and second nut
Corresponding to the thickness of the connecting rod
A large one is used and the outer surface of the first tightening member
At the end of the male screw part, the outer male screw part of the first tightening member is attached.
And the female screw hole of the second tightening member are screwed together and tightened.
The annular collar that faces the end surface of the second tightening member in this state is provided.
Before the first tightening member is covered with the first connecting rod.
The first connecting rod is screwed into the male threaded portion at the tip to make the first connecting rod.
By the first fixing nut attached to each connecting rod
After tightening, the first tightening member is fixed and the second tightening
Of the second connecting rod before covering the second connecting rod with the bracket member.
It can be attached to each of the second connecting rods by screwing it into the male thread on the tip.
The second fixed nut that is attached to the second fixed nut
The fastening member is fixed.

[0011]

[0012]

[0013]

1 to 5 show an embodiment of the present invention. 1 to 5, reference symbols DB1 and D
B2 is a divided block, 10 is an internal rebar, 30 is a connecting rod, and 50 is a connector.

The divided blocks DB1 and DB2 are for beam blocks and are connected left and right to form a beam block having a predetermined shape (see FIG. 1). This divided block DB1 and DB2
Is a precast concrete product manufactured in advance at a place other than the construction site, and is delivered to the construction site without being connected.

Internal reinforcing bars 10 are incorporated in the divided blocks DB1 and DB2, respectively. The internal reinforcing bars 10 are arranged so as to connect the eight main bars 11 parallel to each other, the four stirrup bars 12 arranged so as to surround the outer side of the main stirrup 11 and the ends of the stirrup bars 12. 4 auxiliary muscles 1
3, the divided blocks DB1 and DB2 are assembled in a similar shape and then joined by welding or another method to be integrated. Of course, one having a structure other than the illustrated example may be used as the internal rebar, and one having a reinforcing bar (not shown) parallel to the main bar 11 may be used as the internal rebar.

Further, recesses 40 having openings on the upper and lower surfaces and on the connecting surface side are provided on the upper and lower surfaces on the connecting surface side of the divided block DB1 and on the upper and lower surfaces on the connecting surface side of the divided block DB2. Two are formed at a time.

Further, four connecting rods 30 each having a predetermined length are embedded in each of the divided blocks DB1 and DB2 so as to be parallel to the main bar 11. In the illustrated example, a deformed reinforcing bar is used as the connecting rod 30, and the connecting rod 30 is joined to the internal reinforcing bar 10 by welding or another method. That is, the divided block D
B1 and DB2 are manufactured using the internal rebar 10 in which the connecting rod 30 is integrated. Also, each connecting rod 3
0 has a male screw portion 30a at one end thereof, and the male screw portion 30a is exposed in each recess 40.

Incidentally, the thickness of the connecting rod 30 is appropriately selected according to the conditions such as the weight of the divided blocks to be connected and the force externally applied to the beam block after connection. In addition, the size of the connector 50, which will be described in detail later, also depends on the size of the connecting rod
It is appropriately selected according to the thickness of 0 and the same conditions as described above.

For example, in the beam block according to the present embodiment, since the pulling force acts on the lower surface side and the compressive force acts on the upper surface side, the upper surface side on which the compressive force acts on the lower surface side on which the tensile force acts. Instead, it is preferable to use a thick connecting rod 30 and a corresponding large-sized connecting device 50. Of course, even if the thickness of the connecting rod 30 and the size of the connecting device 50 are the same, the number of connecting rods 30 and connecting devices 50 on the lower surface side where the pulling force acts is larger than that on the upper surface side where the compressing force works. Good.

Further, in the present embodiment, the deformed rebar having the convex surface portion is used as the connecting rod 30, and the connecting rod 30 is integrated with the internal reinforcing bar 10, so that the connecting rod 3 is formed.
The desired tensile strength is set to 0.
If the desired tensile strength can be obtained without integrating the connecting rod 30 with the internal rebar 10, the connecting rod 3
It is not always necessary to bond 0 to the internal rebar 10.

As shown in FIGS. 3 and 4, the connector 50 includes a first fastening member 51 and a second fastening member 52.
And two nuts 53 that can be attached to the male screw portion 30a of the connecting rod 30.

The first tightening member 51 is the connecting rod 30.
Insertion hole 51a having a diameter slightly larger than the outer diameter of
And an insertion hole 51b having a diameter slightly larger than the outer diameter of the nut 53 via a step 51c. Further, a nut-shaped portion 51d with which a tool (not shown) such as a wrench can be engaged is provided at the end of the first tightening member 51 on the insertion hole 51a side. Further, a male screw portion 51e is provided on the outer surface of the insertion hole 51b of the first tightening member 51.

The second tightening member 52 is the connecting rod 30.
Insertion hole 52a having a diameter slightly larger than the outer diameter of
And a female screw hole 52b corresponding to the male screw portion 51e,
It has through the step 52c. Further, a nut-shaped portion 52d that can be engaged with a tool (not shown) such as a wrench is provided at the end of the second tightening member 52 on the insertion hole 52a side.

As can be seen from the drawings, the male screw portion 51e of the first tightening member 51 and the female screw hole 52b of the second tightening member 52 of the connector 50 are both right-hand threads, and the connecting rod 30 The threads of the male screw portion 30a are all left-handed threads. Of course, at least one of the threads of the male thread portion 30a of the connecting rod 30 is a right-hand thread, or the threads of the male thread portion 51e of the first fastening member 51 and the female thread hole 52b of the second fastening member 52 are left. Even with screws, it is possible to carry out the desired block connection.

When connecting the two divided blocks DB1 and DB2 by the connector 50, first, as shown in FIG. 5, the connecting rod 30 of one divided block DB1 is connected.
The second tightening member 52 is covered on the outer side of the exposed portion of and the nut 53 is attached to the male screw portion 30a. Further, the first tightening member 51 is covered on the outside of the exposed portion of the connecting rod 30 in the other divided block DB2, and the nut 53 is attached to the male screw portion 30a. It should be noted that depending on the relationship between the facing distance between the connecting rods 30 and the sizes of the components of the coupler 50 when the blocks are combined, this mounting operation can be performed after the blocks are combined, which will be described later.

By attaching a mark indicating the nut mounting position to each male screw portion 30a, the mounting position of the nut 53 on the male screw portion 30a can be easily determined. Further, if an adhesive is applied to the inner surface of the nut 53 in advance, or if two nuts having a small thickness are used as the nut 53 and one nut is fixed to the other nut, the nut mounting position varies. Can be prevented.

Next, two divided blocks DB1 and DB2
The connecting surfaces are combined so that the recesses 40 of the connecting rods match each other, in other words, the center lines CL (see FIG. 5) of the connecting rods 30 of the connecting rods match each other with a packing (not shown) interposed therebetween. By the way, if the connecting surface of the divided block DB1 and the divided block DB2 is provided with a convex portion and a concave portion that engage with each other, the above-mentioned combination work can be easily performed, and the shear resistance of the blocks after the coupling can be improved. Can be improved.

Next, the tightening members 51 and 52 attached to the connecting rods 30 facing each other are turned by fingertips,
The male screw portion 51e of the first tightening member 51 is lightly screwed into the female screw hole 52b of the second tightening member 52.

Next, the nut-shaped portion 51d of the first tightening member 51 and the nut-shaped portion 52d of the second tightening member 52.
While the tool is engaged with the tightening member, the tightening members 51 and 52 are rotated in opposite directions, or by rotating only the other tightening member while holding one tightening member, the male screw of the first tightening member 51 is rotated. Second part 51e
The tightening member 52 is tightened in the female screw hole 52b.

As the tightening progresses, the nuts 53 attached to the male screw portions 30a of the connecting rods 30 come into contact with the step 51c of the first tightening member 51 and the step 52c of the second tightening member 52. When the tightening is further continued after this, the connecting rods 30 are attracted in the direction of the arrow in FIG. 3, whereby the connecting surfaces of the divided blocks DB1 and DB2 are pressed against each other via the packing without a gap. Divided block DB1 and divided block DB2
In order to press the connection surfaces of (1) and (3) without unevenness, it is desirable that the above-mentioned tightening work is uniformly performed on the four connectors 50.

By this tightening, a pulling force in the direction of the arrow in FIG. 3 acts on each connecting rod 30, but as described above, each connecting rod 30 has sufficient strength (adhesive force to concrete) against this. ) Is secured, the connecting rod 30 does not slip out of the block during tightening. Also, each connecting rod 3
Since the tensile force acting on 0 is dispersed in the block via the concrete contact surface, cracks due to local stress concentration do not occur.

Further, the insertion hole 51 of the first tightening member 51
Since there is some play between a and the connecting rod 30 and between the insertion hole 52a of the second tightening member 52 and the connecting rod 30, there is a deviation in the center lines CL of the connecting rods 30 facing each other. However, this deviation can be absorbed by the play so that the connecting work can be properly performed.

Further, the direction of the threads of the male screw portion 51e of the first tightening member 51 and the female screw hole 52b of the second tightening member 52 and the direction of the screw threads of the male screw portion 30a of the connecting rod 30 are reversed. Therefore, during the tightening work,
The nut 53 attached to the male screw portion 30a of the connecting rod 30 does not loosen. Of course, as described above, the inner surface of the nut 53 attached to the male screw portion 30a may be previously coated with an adhesive material, or the nut 53 may be applied.
Even when two nuts having a small thickness are used and one nut is fixed to the other nut, the same loosening prevention effect as described above can be obtained.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided blocks DB2 continue until they come into pressure contact with each other through the packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening work is completed, a hardening material (not shown) is filled in each recess 40 and hardened. As the hardening material, reinforced mortar made of a mixture of mortar and resin can be preferably used. As a result, the connector 50 is prevented from loosening, and the shear resistance of the joint is improved. This completes a series of connecting operations.

According to the concrete block connection structure described above, a simple operation of rotating at least one of the first tightening member 51 and the second tightening member 52 using a tool after combining the divided blocks DB1 and DB2 Thus, the connecting surfaces of the divided blocks DB1 and DB2 can be pressed against each other via the packing to firmly connect the blocks DB1 and DB2.

Further, since the pulling force can be applied to the connecting rods 30 facing each other by the tightening work to sufficiently press the packing, the divided block DB1
By connecting DB2 and DB2 in an appropriate pressure contact state, desired airtightness and watertightness can be accurately ensured.

Further, since the pulling force can be applied to the connecting rods 30 facing each other, the divided blocks DB1 and DB2 will not be loosened even when receiving a force from the outside, and the divided blocks DB1 and DB2 can be connected for a long time. The condition can be maintained in good condition.

Furthermore, since the connector 50 can be made compact and the connector 50 can be easily retrofitted to the divided blocks DB1 and DB2, it is necessary to keep the connector 50 attached to the block before coupling. Without connector 5
There is an advantage that 0 can be stored and managed in another place.

Instead of the nut-shaped portion 51d of the first tightening member 51 and the nut-shaped portion 52d of the second tightening member 52, a toothed portion (rectangular grooves at equal intervals in the circumferential direction) as shown in FIG. Lined portions) 51f and 52e may be provided. In this case, the toothed portions 51f and 52
A tool having a protrusion that can be engaged with e is used as a tool.

Further, it is possible to prevent plastic deformation of the connecting rod 30 and the both fastening members 51, 52 due to an external force applied to the blocks after connection, and to maintain good connection strength, watertightness and airtightness of the blocks. The method shown in FIG. 7, FIG. 8 or FIG.

In the method shown in FIG. 7, two fixing nuts 54 are previously attached to each of the male screw portions 30a of the connecting rod 30, and after the tightening work of the first tightening member 51 and the second tightening member 52 is completed. The first tightening member 51 and the second tightening member 5 are tightened by tightening the fixing nut 54.
2 is fixed. Of course, even if the number of fixing nuts 54 is one, the same fixing can be performed.

In the method shown in FIG. 8, the first tightening member 51 is used.
At least one injection hole 51g communicating with the insertion holes 51a and 51b is formed on the outer surface of the second fastening member 52, and the injection hole 52 communicating with the insertion hole 52a and the female screw hole 52b is formed on the outer surface of the second tightening member 52.
At least one f is formed, and the hardening material HM is injected into either one of the injection holes from the injection nozzle PN. The injected hardening material HM has a female screw hole 52b.
Between the male screw portion 51e and the insertion hole 51a, 52a
And enters into the gap between the connecting rod 30 and hardens. As this hardening material HM, one prepared by mixing an extender or the like with an epoxy or polyester resin can be preferably used.

In the method shown in FIGS. 9A and 9B, a predetermined amount of the hardening material HM is previously filled in the female screw hole 52b of the second tightening member 52, and then the female screw of the second tightening member 52 is formed. The male screw portion 51e of the first tightening member 51 is tightened in the hole 52b. The hardening material HM enters the gap between the female screw hole 52b and the male screw portion 51e or the gap between the insertion holes 51a and 52a and the connecting rod 30 in accordance with the tightening, and hardens after the tightening operation is completed. The hardening material HM used here is the same as the above. While tightening the male screw portion 51e of the first tightening member 51 into the female screw hole 52b of the second tightening member 52, both tightening members 51, 5
If vibration is applied by shaking 2 or the like, it is possible to promote the wraparound of the hardening material HM into the gap.

Further, in the above-described embodiment, the straight rods having straight deformed shape are used as the connecting rod 30, but the connecting rod shown in FIG. 10 (A), FIG. 10 (B) or FIG. 10 (C) is used. If adopted, the adhesive force of the connecting rod 30 to concrete can be increased and the tensile strength thereof can be improved. Connecting rod 30 shown in FIG.
The reinforcing member 31 bent in a wave shape is joined along the length direction. The connecting rod 30 shown in FIG.
A plurality of rod-shaped reinforcing members 32 are joined in parallel at intervals in the length direction. The connecting rod 30 of FIG.
A plurality of rod-shaped reinforcing members 33 for the two connecting rods 30
Are joined in parallel at intervals in the length direction. Of course, the same effect can be expected by bending the connecting rod 30 itself to form a corrugated portion, an L-shaped portion, or the like.

Furthermore, in the above-described embodiment, the main bar 1
Although the internal rebar 10 is composed of 1, the stirrup bar 12 and the auxiliary bar 13, as shown in FIG. 11, a resin net 14 formed in a grid pattern or another pattern, a grid pattern or another pattern is formed. By interposing the wire mesh 15 knitted in step 2 between the main bar 11 and the connecting rod 30, the brittle resistance of the divided block itself can be increased. Further, the stress acting between the connecting rod 30 and the concrete to which it is attached at the time of connecting the blocks can be effectively dispersed by the resin net 14 and the metal net 15, and further effectively by the internal rebar 10. Can be dispersed. By the way, the wire mesh 1
5 may be connected to at least one of the internal rebar 10 and the connecting rod 30.

An example of a coupler having a structure other than the above will be described below with reference to FIGS. 12 to 28.

The connector 60 shown in FIGS. 12 to 14 is the first
The tightening member 61, the second tightening member 62, and one nut 63 attachable to the male screw portion 30a of the connecting rod 30 are included.

The first tightening member 61 is the connecting rod 30.
It has a female screw hole 61a corresponding to the male screw portion 30a in the center. In addition, the female screw hole 61 of the first tightening member 61
A nut-shaped portion 61b with which a tool (not shown) such as a wrench can be engaged is provided on the opening side of a. Further, a male screw portion 61c is provided on the outer surface of the first tightening member 61.

The second tightening member 62 is the connecting rod 30.
Insertion hole 62a having a diameter slightly larger than the outer diameter of
And a female screw hole 62b corresponding to the male screw portion 61c,
It has through the step 62c. Further, a nut-shaped portion 62d that can be engaged with a tool (not shown) such as a wrench is provided at the end of the second tightening member 62 on the insertion hole 62a side.

As can be seen from the drawings, the threads of the male screw portion 61c of the first tightening member 61 and the female screw hole 62b of the second tightening member 62 in the connector 60 are both right-handed threads. In addition, the nut 63 is used during tightening work described later.
In order to prevent the screw from loosening, the male thread portion 30a of the connecting rod 30 on the second tightening member 62 side has a left-hand thread. Of course, at least one of the threads of the male screw portion 30a of the connecting rod 30 is a right-hand thread, or
Even if the male screw portion 61c of the tightening member 61 and the screw thread of the female screw hole 62b of the second tightening member 62 are left-threaded, the desired block connection can be performed.

When connecting the two divided blocks DB1 and DB2 by the connecting device 60, first, as shown in FIG. 14, the connecting rod 3 of one divided block DB1 is connected.
The second tightening member 62 is covered on the outside of the exposed portion of 0,
The nut 63 is attached to the male screw portion 30a. Also,
The first tightening member 61 is attached to the male screw portion 30a of the connecting rod 30 of the other divided block DB2. still,
Depending on the relationship between the facing distance between the connecting rods 30 and the sizes of the components of the coupler 60 when the blocks are combined, this mounting operation may be performed after the blocks are combined, which will be described later.

By attaching a mark indicating the mounting position of the nut 63 and the second tightening member 62 to each male screw part 30a, the mounting position of the nut 63 and the second tightening member 62 to the male screw part 30a can be easily determined. . If an adhesive is applied to the inner surface of the nut 63 in advance, or if two nuts having a small thickness are used as the nut 63 and one nut is fixed to the other nut, the nut mounting position varies. Can be prevented.

Next, two divided blocks DB1 and DB2
So that the recesses 40 of the connecting rods are aligned with each other, in other words, the center lines CL of the connecting rods 30 of each other (see FIG. 14).
The packing (not shown) is sandwiched between them so that they match.

Next, the tightening members 61 and 62 attached to the connecting rods 30 facing each other are turned by fingertips,
The female screw hole 62b of the second tightening member 62 is lightly tightened on the male screw portion 61c of the first tightening member 61.

Next, the nut-shaped portion 61b of the first tightening member 61 and the nut-shaped portion 62d of the second tightening member 62.
When the tool is engaged with the first tightening member 61 and the second tightening member 62 is rotated while pressing the first tightening member 61, the male screw portion 61c of the first tightening member 61 is attached to the second screw member 61c.
The female screw hole 62b of the tightening member 62 is tightened. First
Since the pitch of the threads of the male screw portion 61c of the fastening member 61 is larger than the pitch of the threads of the male screw portion 30a of the connecting rod 30, only the first fastening member 61 is rotated while pressing the second fastening member 62. However, the same tightening work can be performed.

As the tightening progresses, the nut 63 attached to the male screw portion 30a of the connecting rod 30 comes into contact with the step 62c of the second tightening member 62. When the tightening is further continued after this, the connecting rods 30 are pulled in the direction of the arrow in FIG. 12, whereby the divided blocks DB1 and DB2 are pressed into contact with each other via the packing without a gap.

Since there is some play between the insertion hole 62a of the second tightening member 62 and the connecting rod 30, even if there is a deviation in the center line CL of the connecting rods 30 that face each other, this deviation is used as the play. It can be absorbed by and can be properly connected.

The male screw portion 6 of the first tightening member 61
1c and the direction of the screw thread of the female screw hole 62b of the second tightening member 62 and the direction of the screw thread of the male screw portion 30a of the connecting rod 30 are different from each other.
The nut 63 attached to the male screw portion 30a of the connecting rod 30 does not loosen. Of course, as described above, the adhesive may be applied in advance to the inner surface of the nut 63 attached to the male screw portion 30a, or the nut 63 may be attached.
Even when two nuts having a small thickness are used and one nut is fixed to the other nut, the same loosening prevention effect as described above can be obtained.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided blocks DB2 continue until they come into pressure contact with each other through the packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening work is completed, a curing material (not shown) similar to the above is filled in each recess 40 and cured. This prevents the connector 60 from loosening and improves the shear strength of the connecting portion. This completes a series of connecting operations.

Instead of the nut-shaped portion 61b of the first tightening member 61 and the nut-shaped portion 62d of the second tightening member 62, a toothed portion (rectangular grooves at equal intervals in the circumferential direction) as shown in FIG. Lined portions) 61d and 62e may be provided. In this case, the toothed portions 61d and 6
A tool having a protrusion that can be engaged with 2e is used as a tool.

Further, it is possible to prevent the connecting rod 30 and the fastening members 61 and 62 from being plastically deformed by an external force applied to the blocks after connection, and to maintain the connection strength, watertightness and airtightness of the blocks in good condition. Can adopt the method shown in FIG.

In the method shown in FIG. 16, two fixing nuts 64 are previously attached to each of the male screw portions 30a of the connecting rod 30, and after the tightening work of the first tightening member 61 and the second tightening member 62 is completed. Fixing nut 64
Is tightened to fix the first tightening member 61 and the second tightening member 62. Of course, even if the number of fixing nuts 64 is one, the same fixing can be performed. Although the description is omitted, the same effect can be obtained by adopting the same methods as those shown in FIGS. 8 and 9.

The connector 70 shown in FIGS. 17 to 19 has a tubular guide member 71, a lid member 72 for closing the opening of the guide member 71, two tightening members 73, two spring washers 74, and a coil. It is composed of a spring 75.

The guide member 71 has an inner cavity 71a having a circular cross section and a female screw portion 71b provided on the inner surface of the opening of the inner cavity 71a. Further, at the end of the guide member 71 opposite to the female screw portion 71b, the tightening member 7
An insertion hole 71c for 3 is provided, and a step 71d is provided inside the insertion hole 71c. Reference numeral 71e is a hole for injecting a hardening material.

The lid member 72 has an insertion hole 72a for the tightening member 73 in the center, and the female screw portion 7 is formed on the outer surface of one end.
It has a male screw portion 72b corresponding to 1b.

Each tightening member 73 has an insertion hole 71c.
And a hexagonal prism shape that can be inserted into 72a. A female screw hole 73a corresponding to the male screw portion 30a of the connecting rod 30 is provided at the center of one end of each tightening member 73. A circular collar 73b having a smaller diameter than the internal cavity 71a is provided on the outer surface of the other end of each tightening member 73.

As can be seen from the drawings, the threads of the female screw holes 73a of each tightening member 73 in the connector 70 are all right-hand threads, and the male screw portion 30a of the connecting rod 30 is formed.
Both threads are right-handed. Of course, even if at least one of the threads of the male screw portion 30a of the connecting rod 30 is left-handed and the threads of the tightening member 73 are changed accordingly, the desired block connection can be carried out.

The connector 70 is preassembled before the connecting work. In this assembly, as shown in FIG. 18, in the guide member 71, the spring washer 74, the tightening member 73, the coil spring 75, the tightening member 73,
After inserting the spring washers 74 in order, the male screw portion 72b of the lid member 72 is fastened to the female screw portion 71b of the guide member 71.

When the two divided blocks DB1 and DB2 are connected by the connector 70, first, as shown in FIG. 19, the connecting surfaces of the two divided blocks DB1 and DB2 are aligned so that the recesses 40 of the two are aligned. In other words, the packing (not shown) is sandwiched between the connecting rods 30 so that the center lines CL of the connecting rods 30 coincide with each other.

Next, with the preassembled tightening member 73 of the connector 70 being pushed into the guide member 71 against the biasing force of the coil spring 75, the connector 7
0 is inserted into the recess 40. After the insertion, release the tightening of each tightening member 73, and insert each female screw hole 73a.
To the male screw portion 30a of the connecting rod 30, and each tightening member 73 is lightly tightened to the male screw portion 30a by turning with a fingertip.

Next, with the tool engaged with each tightening member 73, each tightening member 73 is rotated in the opposite direction, whereby the female screw hole 7 of each tightening member 73 is rotated.
3a is fastened to each of the male screw portions 30a of the connecting rod 30. Of course, this tightening work is performed by the tightening member 73.
Alternatively, it may be performed by holding down one and rotating only the other.

As the tightening progresses, the circular brim 73b of each tightening member 73 is moved to the step 71d of the guide member 71 and the lid member 7.
The end face of 2 is abutted via the spring washer 74.
If you continue tightening after this, each connecting rod 3
0 is attracted in the direction of the arrow in FIG. 17, whereby the divided block DB1 and the divided block DB2 are pressed against each other via the packing without a gap.

Since there is some play between the insertion hole 71c of the guide member 71 and the tightening member 73, and between the insertion hole 72a of the lid member 72 and the tightening member 73, the centers of the connecting rods 30 facing each other. Even if the line CL is misaligned,
This deviation can be absorbed by the play to properly perform the connecting work.

If the lid member 72 that has been fastened to the guide member 71 is loosened during the fastening, the direction of the thread of the male screw portion 72b of the lid member 72 should be changed to the female screw of the fastening member 73. It is recommended to reverse the direction of the screw thread of the hole 73a. Of course, when the lid member 72 is fastened to the guide member 71, the male screw portion 72b of the lid member 72 may be previously coated with an adhesive material.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided blocks DB2 continue until they come into pressure contact with each other through the packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening work is completed, a hardening material (not shown) similar to the above is filled in each recess 40 and hardened. As a result, the connector 70 is prevented from loosening, and the shear resistance of the connecting portion is improved. This completes a series of connecting operations.

The connector 80 shown in FIGS. 20 to 22 is composed of a tubular guide member 81 and two fastening members 82.

The guide member 81 has an internal cavity 81a having a circular cross section. Further, on the outer peripheral surface of the guide member 81, an insertion port 81b for inserting the tightening member 82 into the internal cavity 81a is provided. Further, on both end surfaces of the guide member 81, the insertion hole 81c for the tightening member 82 is formed.
And a step 81d is provided inside the insertion hole 81c.

Each tightening member 82 has the insertion hole 81c.
It has a hexagonal prism shape that can be inserted into. The male screw portion 30 of the connecting rod 30 is provided at the center of one end of each tightening member 82.
A female screw hole 82a corresponding to a is provided. Also,
The inner cavity 8 is formed on the outer surface of the other end of each tightening member 82.
A circular brim 82b having a diameter smaller than that of 1a is provided.

As can be seen from the drawings, the threads of the female screw holes 82a of the tightening members 82 of the connector 80 are all right-hand threads, and the male screw portion 30a of the connecting rod 30 is formed.
Both threads are right-handed. Of course, even if at least one of the screw threads of the male screw portion 30a of the connecting rod 30 is a left screw and the screw threads of the tightening member 82 are changed accordingly, the desired block connection can be performed. .

The connector 80 is preassembled before the connecting work. As shown in FIG. 21, this assembly is performed by inserting two tightening members 82 into the guide member 81 through the insertion opening 81b.

When the two divided blocks DB1 and DB2 are connected by the connecting device 80, first, as shown in FIG. 22, the connecting surfaces of the two divided blocks DB1 and DB2 are aligned with each other so that the recesses 40 thereof are aligned with each other. In other words, the packing (not shown) is sandwiched between the connecting rods 30 so that the center lines CL of the connecting rods 30 coincide with each other.

Next, with one or both of the fastening members 82 of the preassembled connector 80 being pushed into the guide member 81, the connector 80 is inserted into the recess 40. After the insertion, each tightening member 82 is pulled out from the insertion hole 81c, each female screw hole 82a is aligned with the male screw portion 30a of the connecting rod 30, and each tightening member 82 is turned with a fingertip and lightly tightened to the male screw portion 30a. .

Next, with the tightening members 82 engaged with the tool, each of the tightening members 82 is rotated in the opposite direction, whereby the female screw hole 8 of each tightening member 82 is rotated.
2a is fastened to each of the male screw portions 30a of the connecting rod 30. Of course, this tightening work is performed by the tightening member 82.
Alternatively, it may be performed by holding down one and rotating only the other.

As the tightening proceeds, the circular brim 82b of each tightening member 82 contacts the step 81d of the guide member 81. When the tightening is further continued after this, the connecting rods 30 are pulled in the direction of the arrow in FIG. 20, whereby the divided blocks DB1 and DB2 are pressed into contact with each other via the packing without a gap.

Since there is some play between the insertion hole 81c of the guide member 81 and each tightening member 82, even if the center lines CL of the connecting rods 30 facing each other are misaligned.
This deviation can be absorbed by the play to properly perform the connecting work.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided blocks DB2 continue until they come into pressure contact with each other through the packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening work is completed, a hardening material (not shown) similar to the above is filled in each recess 40 and hardened. As a result, the connector 80 is prevented from loosening, and the shearing resistance of the connecting portion is improved. This completes a series of connecting operations.

The connector 90 shown in FIGS. 23 to 25 is composed of a tubular guide member 91 and a tightening member 92.

The guide member 91 has an internal cavity 91a having a circular cross section. Further, on the outer peripheral surface of the guide member 91, an insertion opening 91b for inserting the tightening member 92 into the internal cavity 91a is provided. Further, one end surface of the guide member 91 has an insertion hole 9 for the tightening member 92.
1c is provided, and a step 91d is provided inside the insertion hole 91c. Furthermore, a nut-shaped portion 91e engageable with a tool (not shown) such as a wrench is provided on one end surface of the guide member 91, and the male screw portion of the connecting rod 30 is provided at the center of the nut-shaped portion 91e. A female screw hole 91f corresponding to 30a is provided.

The tightening member 92 has a hexagonal prism shape which can be inserted into the insertion hole 91c. A female screw hole 92a corresponding to the male screw portion 30a of the connecting rod 30 is provided at the center of the tightening member 92. On the outer surface of the other end of the tightening member 92, a circular collar 92b having a diameter smaller than that of the internal cavity 91a is provided.

As can be seen from the drawing, both the threads of the female screw hole 91f of the guide member 91 and the screw thread of the female screw hole 92a of the tightening member 92 in the connector 90 are right-handed screws, and the male rod of the connecting rod 30 is the same. All the threads of the screw portion 30a are right-hand threads. Needless to say, even if at least one of the threads of the male thread portion 30a of the connecting rod 30 is left-handed and the threads of the guide member 91 and the tightening member 73 are changed accordingly, the desired block connection cannot be performed. It is possible.

The connector 90 is preassembled before the connecting work. This assembly is performed by inserting the tightening member 92 into the guide member 91 through the insertion opening 91b as shown in FIG.

When the two divided blocks DB1 and DB2 are connected by the connecting device 90, first, as shown in FIG. 25, the connecting surfaces of the two divided blocks DB1 and DB2 are aligned so that the recesses 40 of the two are aligned. In other words, the packing (not shown) is sandwiched between the connecting rods 30 so that the center lines CL of the connecting rods 30 coincide with each other.

Next, with the preassembled fastening member 92 of the connector 90 being pushed into the guide member 91, the connector 90 is inserted into the recess 40. If the length dimension of the guide member 91 is larger than the interval between the connecting rods 30 facing each other, the guide member 91 is inclined at the time of this insertion as shown by the chain double-dashed line in FIG.
Is preferably inserted into one of the connecting rods 30.
After the insertion, the female screw hole 91f of the guide member 91 is aligned with the male screw portion 30a of the one connecting rod 30, and the tightening member 92 is pulled out from the insertion hole 91c so that the female screw hole 9f.
2a is aligned with the male screw portion 30a of the other connecting rod 30, and each of the guide member 91 and the fastening member 92 is turned with a fingertip and lightly fastened to the male screw portion 30a.

Next, the nut-shaped portion 91 of the guide member 91.
By rotating the guide member 91 and the tightening member 92 in opposite directions while the tool is engaged with each of the e and the tightening member 92, the female screw hole 91f of the guide member 91 is formed.
To the male screw portion 30a of the one connecting rod 30, and the female screw hole 92a of the tightening member 92 to the male screw portion 30a of the other connecting rod 30. Of course, this tightening work may be performed by pressing one of the guide member 91 and the tightening member 92 and rotating only the other.

As the tightening proceeds, the circular brim 92b of the tightening member 92 contacts the step 91d of the guide member 91.
If you continue tightening after this, each connecting rod 3
0 is attracted in the direction of the arrow in FIG. 23, whereby the divided block DB1 and the divided block DB2 are pressed against each other via the packing without a gap.

Since there is some play between the insertion hole 91c of the guide member 91 and the tightening member 92, even if there is a deviation in the center lines CL of the connecting rods 30 facing each other, this deviation is absorbed by the play. Thus, the connecting work can be properly performed.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided blocks DB2 continue until they come into pressure contact with each other through the packing under a predetermined pressure, whereby the two divided blocks DB1 and DB2 are firmly connected.

After the tightening work is completed, a hardening material (not shown) similar to the above is filled in each recess 40 and hardened. As a result, the connector 90 is prevented from loosening, and the shearing resistance of the connecting portion is improved. This completes a series of connecting operations.

The connector 100 shown in FIGS. 26 to 28 is composed of a first tightening member 101 and a second tightening member 102.

A female screw hole 101a corresponding to the male screw portion 30a of the connecting rod 30 is provided at the center of one end face of the first tightening member 101, and a male screw portion 101b is provided at the other end.
Is provided. Further, one end surface of the first tightening member 101 is provided with toothed portions 101c in which rectangular grooves are arranged at equal intervals in the circumferential direction.

A female screw hole 102a corresponding to the male screw portion 101b of the first tightening member 101 is provided at the center of one end face of the second tightening member 102, and a male screw portion 30a of the connecting rod 30 is provided at the center of the other end face. Female screw hole 10 corresponding to
2b is provided. In addition, the second tightening member 102
On the other end surface of the toothed wheel, there are provided toothed portions 102c in which rectangular grooves are arranged at equal intervals in the circumferential direction.

As can be seen from the drawing, this connector 100
The female thread hole 101a of the first tightening member 101, the screw thread of the male screw portion 101b, and the screw thread of the female screw hole 102a of the second tightening member 102 in FIG.
Male screw part 30 of connecting rod 30 on the side of tightening member 101
The thread of a is also the right thread. Further, the screw thread of the female screw hole 102b of the second tightening member 102 is a left screw, and the screw thread of the male screw portion 30a of the connecting rod 30 on the second tightening member 102 side is also a left screw. Of course, the first
Female screw hole 101a of tightening member 101 and male screw portion 10
1b screw thread and female screw hole 10 of the second tightening member 102
The screw thread of 2a is a left screw, and the first tightening member 10
The screw thread of the male screw portion 30a of the connecting rod 30 on the first side is a left screw, and the female screw hole 1 of the second tightening member 102 is
The screw thread of 02b is the right screw, and the second tightening member 1
Even if the male thread portion 30a of the 02 side connecting rod 30 has a right-hand thread, the desired block connection can be performed.

When the two divided blocks DB1 and DB2 are connected by the connector 100, first, FIG.
As shown in, the second tightening member 102 is attached to the male screw portion 30a of the connecting rod 30 in one of the divided blocks DB1 using the female screw hole 102b. Further, the male screw portion 3 of the connecting rod 30 of the other divided block DB2
The first tightening member 101 is attached to 0a using the female screw hole 101a. It should be noted that depending on the relationship between the facing distance between the connecting rods 30 in the block combination and the sizes of the components of the coupler 100, this mounting operation can be performed after the block combination described later.

Next, two divided blocks DB1 and DB2
So that the recesses 40 of the connecting rods are aligned with each other, in other words, the center lines CL of the connecting rods 30 of each other (see FIG. 28).
The packing (not shown) is sandwiched between them so that they match.

Next, the tightening members 101 and 102 attached to the connecting rods 30 facing each other are turned with a fingertip, and the male screw portion 101b of the first tightening member 101 is moved to the second position.
Lightly tighten in the female screw hole 102a of the tightening member 102.

Next, the toothed ring portion 101c of the first tightening member 101 and the toothed ring portion 10 of the second tightening member 102.
2c is engaged with the tool, the first tightening member 101 is rotated by the tool, and the male screw portion 101b of the first tightening member 101 is moved to the second tightening member 102.
Tighten in the female screw hole 102a. This tightening is continued until the first tightening member 101 and the second tightening member 102 are joined together without a gap.

Next, the first tightening member 101 and the second tightening member 102 after coupling are rotated in the same direction by a tool so that the female screw hole 101a of the first tightening member 101 is connected to the male screw portion 30a of the connecting rod 30. Second tightening member 1
02 female screw hole 102b is connected to the male screw portion 3 of the connecting rod 30.
Tighten each to 0a. As a result, the connecting rods 30 are pulled in the direction of the arrow in FIG. 26, whereby the divided blocks DB1 and DB2 come into pressure contact with each other via the packing without a gap.

The above-mentioned tightening work is performed in the divided block DB.
1 and the divided block DB2 continue until they come into pressure contact with each other under a predetermined pressure via the packing. As a result, the two divided blocks DB1 and DB2 are firmly connected.

After the tightening work is completed, the same hardening material (not shown) as described above is filled in each recess 40 and hardened. As a result, the connector 100 is prevented from loosening, and the shearing resistance of the joint is improved. This completes a series of connecting operations.

An example of a concrete block connection structure other than the beam block shown in FIG. 1 will be described below with reference to FIGS. 29 to 33. In the drawing, a recess 40 for accommodating the coupler is shown.

FIG. 29 shows an example in which the present invention is applied to an underdrain block. This underdrain block is integrated by combining two divided blocks DB3 and DB4, which are divided and produced in advance, through a packing (not shown) and connecting them by a connector (not shown). There is. Each of the divided blocks DB3 and DB4 contains an internal rebar (not shown) assembled in a similar shape to each block. The recess 40 is formed in each divided block D.
Two pieces are provided on the outer side surfaces of the connecting ends of B3 and DB4 at intervals. The connecting rod (not shown) is embedded in the divided blocks DB3 and DB4 in a state of being joined or not joined to the internal reinforcing bar, and its male screw portion is exposed in the recess 40. Any one of the above-mentioned couplers is selectively used to connect the divided blocks DB3 and DB4. The method of block connection is the same as the method described above.

FIG. 30 shows an example in which the present invention is applied to an underdrain block. This underdrain block is integrated by combining four divided blocks DB5 to DB8, which are manufactured by dividing in advance, into a rectangular shape through a packing (not shown) and connecting them by a connector (not shown). ing. In each of the divided blocks DB5 to DB8,
Internal rebars (not shown) assembled in a similar shape to each block are built in. The recess 40 is formed in each divided block D.
Six pieces are provided at intervals on the outer side surfaces of the connection ends of B5 to DB8, and two pieces are provided on the inner side surface at intervals. In other words, the tensile strength is increased by increasing the number of recesses (the number of couplers) on the side where the tensile force acts in the underdrain block after the construction compared to the side where the compressive force acts. The connecting rod (not shown) is embedded in each of the divided blocks DB5 to DB8 in a state of being joined or not joined to the internal reinforcing bar, and its male screw portion is exposed in the recess 40. Any one of the above-described couplers is selectively used to connect the divided blocks DB5 to DB8. The method of block connection is the same as the method described above.

FIG. 31 shows an example in which the present invention is applied to a waterway block. This water channel block is integrated by combining three divided blocks DB9 to DB11, which are manufactured by dividing in advance, into a U shape through a packing (not shown) and connecting them by a connector (not shown). Has been done. Each of the divided blocks DB9 to DB11 has a built-in internal rebar (not shown) assembled in a similar shape to each block. Six recesses 40 are provided on the outer surface of the connection end of each of the divided blocks DB9 to DB11 at intervals, and two recesses 40 are provided on the inner surface at intervals. In other words, the tensile strength is increased by increasing the number of recesses (the number of couplers) on the side on which the tensile force acts in the constructed water channel block than on the side on which the compressive force acts. The connecting rods (not shown) are connected to or not connected to the internal reinforcing bars in the divided blocks DB9 to DB1.
1 is embedded inside, and the male screw part thereof is exposed in the recess 40. Any one of the above-described couplers is selectively used to connect the divided blocks DB9 to DB11. The method of block connection is the same as the method described above.

FIG. 32 shows an example in which the present invention is applied to a retaining wall block. In this retaining wall block, six divided blocks DB12 to DB16, which are produced by dividing in advance, are combined into a substantially L shape through a packing (not shown),
They are integrated by connecting them with a connector (not shown). Each divided block DB12 to DB
An internal rebar (not shown) assembled in a similar shape to each block is incorporated in the block 16. Six recesses 40 are provided on the outer surface of each of the divided blocks DB12 to DB16 at intervals, and four recesses 40 are provided on the inner surface at intervals. In other words, the tensile strength is increased by increasing the number of recesses (the number of couplers) on the side where the tensile force acts in the retaining wall block after the construction than the side where the compressive force acts. The connecting rod (not shown) is connected to the internal rebar or not connected to each divided block DB.
12 to DB16 are embedded inside, and the male screw part thereof is exposed in the recess 40. This divided block DB1
Any one of the above-mentioned couplers is selectively used for coupling 2 to DB16. The method of block connection is the same as the method described above.

FIG. 33 shows an example in which the present invention is applied to an underdrain block. This underdrain block is integrated by combining eight divided blocks DB17 to DB24, which are manufactured by dividing in advance, into a rectangular shape through a packing (not shown) and connecting them by a connector (not shown). ing. Each divided block DB17 to DB2
In FIG. 4, internal rebars (not shown) assembled in a similar shape to each block are built in. Three recesses 40 are provided at intervals on the outer side surfaces of the connection ends of the divided blocks DB17 to DB24, and two recesses 40 are provided on the inner side surface at intervals. In other words, the number of recesses on the side where the tensile force acts on the retaining wall block after construction (the number of couplers)
To increase the tensile strength by increasing the pressure on the side where the compression force acts. The connecting rod (not shown) is connected to the internal rebar or is not connected to each divided block DB17.
It is embedded inside DB24, and the male screw part is exposed in the recessed part 40. This divided block DB 17-
Any one of the above-described couplers is selectively used for coupling the DB 24. The method of block connection is basically the same as the method described above, but here, the prestress method is adopted for block connection.

The prestressing method is a method whose main purpose is to cancel the stress generated by the load.
Here, the upper connected blocks (DB24, DB17, and DB18) and the lower connected blocks (DB22 and DB21)
And DB20), the compressive force is applied in advance to the inner surface side where the tensile force acts to increase the tensile strength. In order to apply a compressive force, a tubular material called a sheath, which is pre-embedded in each of the upper divided blocks (DB24, DB17, and DB18) and the lower divided blocks (DB22, DB21, and DB20). A wire or cable made of high-strength steel or the like (hereinafter, referred to as a tension material WM) is inserted through. And
By pulling and fixing both ends of the tension material WM after insertion using a tool having a nut or a taper, a compressive force is applied to the inner surface side of each of the upper coupling block and the lower coupling block.

A method of connecting divided blocks which can be used when constructing a concrete structure will be described below with reference to FIGS.
Will be described with reference to. In the drawing, the main bar of the internal reinforcing bar is indicated by reference numeral 11 and the connecting rod is indicated by reference numeral 30. Further, the connector 50 shown in FIG. 3 is cited as the connector.

FIGS. 34A and 34B show a method of connecting divided blocks into a T-shape. The connecting rod 30 is joined to the flat plate-shaped divided block DB25 by welding or another method so as to be orthogonal to the main bar 11 of the internal reinforcing bar, and the male screw portion is exposed on the surface. The connecting rod 30 is embedded in the flat plate-shaped divided block DB 26, and the male screw portion is exposed in the recess 40. These divided blocks D
When connecting B25 and DB26, the 1st fastening member 51 and the 2nd fastening member 52 are attached to each male screw part, respectively. Then, the divided blocks DB25 and DB26
After combining as shown in FIG. 34B, the first tightening member 51 and the second tightening member 52 are tightened.

35 (A) and 35 (B) show a method of connecting divided blocks into a T-shape. A T-shaped connecting rod 30 is embedded in the T-shaped divided block DB 27, and a male screw portion is exposed in the recess 40. The connecting rod 30 is embedded in the flat plate-shaped divided block DB 27, and the male screw portion is exposed in the recess 40. When connecting the divided blocks DB27 and DB28, the first tightening member 51 and the second tightening member 52 are attached to the male screw parts.
Install each. Then, the divided block DB 27
After combining and DB28 as shown in FIG. 35 (B),
The first tightening member 51 and the second tightening member 52 are tightened.

FIG. 36 shows a method of connecting the divided blocks in a radial shape. Divided block DB2 of hexagonal column
A Y-shaped connecting rod 30 is embedded in 9 and the three male screw portions are exposed on the surface. Flat block DB
The connecting rod 30 is embedded in 30 to DB32, and the male screw portion is exposed in the recess 40. These divided blocks D
When connecting B29 to DB32, the first tightening member and the second tightening member of the connector 50 are attached to the male screw portions, respectively. Then, the divided blocks DB29 to DB
After assembling 32 as shown in the figure, the first tightening member and the second tightening member are tightened.

FIG. 37 shows a method of connecting divided blocks in a cross shape. Quadrangular block DB3
A cross-shaped connecting rod 30 is embedded in 3 and four male screw portions are exposed on the surface. Flat block DB
The connecting rod 30 is embedded in 34 to DB37, and the male screw portion is exposed in the recess 40. These divided blocks D
When connecting B33 to DB37, the first tightening member and the second tightening member of the connector 50 are attached to the male screw parts, respectively. Then, the divided blocks DB33 to DB
After assembling 37 as shown in the figure, the first tightening member and the second tightening member are tightened.

FIG. 38 shows a method of connecting divided blocks in a cross shape. Cross-shaped divided block DB38
The main bars 11 of the internal reinforcing bars are embedded in parallel with the surface, the connecting rods 30 are embedded in parallel with the main bars 11, and male screw portions provided at both ends of each connecting rod 30 are exposed in the recess 40. . The main bars 11 of the internal reinforcing bars are embedded in parallel in the flat plate-shaped divided blocks DB39 to DB42, and the connecting rod 3
0 is buried in parallel with the main bar 11, and each connecting rod 3
The male screw portions provided at both ends of 0 are exposed in the recess 40. When connecting the divided blocks DB38 to DB42, the first tightening member and the second tightening member of the connector 50 are attached to the male screw portions, respectively. Then, after combining the divided blocks DB38 to DB42 as shown in the drawing, the tightening work of the first tightening member and the second tightening member is performed.

FIG. 39 shows a method of connecting divided blocks into a T-shape. T-shaped divided block DB 43
The connecting rods 30 are embedded in parallel with each other and joined to each other, and male screw portions provided at both ends or one end of each connecting rod 30 are exposed in the recess 40. The connecting rods 30 are embedded in parallel in the flat plate-shaped divided blocks DB44 to DB46, and the male screw portion of each connecting rod 30 is recessed.
It is exposed within 0. These divided blocks DB43 to D
When connecting B46, the first tightening member and the second tightening member of the connector 50 are attached to the male screw parts, respectively. Then, after the divided blocks DB43 to DB46 are combined as shown in the figure, the work of tightening the first tightening member and the second tightening member is performed.

FIG. 40 shows a method of connecting divided blocks into an L shape. L-shaped divided block DB 47
Connecting rods 30 are embedded in parallel with each other, and each connecting rod 3
The male screw portion of 0 is exposed in the recess 40. The connecting rods 30 are embedded in parallel in the flat plate-shaped divided blocks DB48 and DB49, and the male screw portion of each connecting rod 30 is exposed in the recess 40. These divided block DB 47
~ When connecting DB49, connecter 5 to each male screw part
The first tightening member 0 and the second tightening member 0 are attached respectively. Then, after the divided blocks DB47 to DB49 are combined as shown, the first tightening member and the second tightening member
Tighten the tightening member.

FIG. 41 shows a method of connecting divided blocks into a T-shape. L-shaped divided block DB50
A connecting rod 30 is embedded in parallel with the connecting rod 30, the male screw portion of one connecting rod 30 is exposed on the surface, and the other connecting rod 3 is connected.
The male screw portion of 0 is exposed in the recess 40. The connecting rods 30 are embedded in parallel with each other in the flat plate-shaped divided block DB 51, and the male screw portion of each connecting rod 30 is exposed in the recess 40. These divided blocks DB50 and DB51
When connecting, the first tightening member and the second tightening member of the connector 50 are attached to the male screw parts, respectively.
Then, after the divided blocks DB50 and DB51 are combined as shown in the drawing, the first tightening member and the second tightening member are tightened.

FIG. 42 shows a method of connecting the divided blocks into a curved shape. Curved divided block DB52
The connecting rods 30 are embedded along the curved surface, and the male screw portions of each connecting rod 30 are exposed in the recess 40.
The connecting rods 30 are embedded in parallel in the flat plate-shaped divided blocks DB53 and DB54, and the male screw portion of each connecting rod 30 is exposed in the recess 40. When connecting the divided blocks DB52 to DB54, the first tightening member and the second tightening member of the connector 50 are attached to the male screw parts, respectively. Then, the divided block DB 52-
After the DB 54 is assembled as shown in the figure, the first tightening member and the second tightening member are tightened.

FIG. 43 shows a method of connecting the divided blocks into a curved shape. Curved divided block DB55
The connecting rods 30 are embedded along the curved surface, and the male screw portions of each connecting rod 30 are exposed in the recess 40.
The connecting rod 30 is embedded along the curved surface in the curved divided blocks DB56 and DB57, and the male screw portion of each connecting rod 30 is exposed in the recess 40. When connecting these divided blocks DB55 to DB57,
The first tightening member and the second tightening member of the connector 50 are attached to the male screw parts, respectively. Then, after the divided blocks DB55 to DB57 are combined as shown in the figure, the first tightening member and the second tightening member are tightened.

[0132]

As described above in detail, according to the present invention, according to the present onset Akira,
It is possible to concrete blocks together and constituting a retaining wall block linked with strongly and proper pressure conditions to precisely ensure the desired tightness and water-tightness, loose connection points also receives a force from the outside It is possible to prevent the occurrence of the above and maintain a good connection state for a long period of time.

[0133]

[Brief description of drawings]

FIG. 1 is a plan view showing a state in which divided blocks are connected according to an embodiment of the present invention.

2 is a front view of FIG.

FIG. 3 is an enlarged vertical cross-sectional view of the coupler and its peripheral portion in FIG.

FIG. 4 is an exploded perspective view of the coupler shown in FIG.

FIG. 5 is an explanatory diagram of a method of connecting divided blocks.

6 is a perspective view showing a modification of the coupler shown in FIG.

7 is a longitudinal sectional view corresponding to FIG. 3, showing a modification of the coupler shown in FIG.

FIG. 8 is an explanatory view of a method of filling a hardener into the coupler.

FIG. 9 is an explanatory view of a method of filling a hardener in the coupler.

FIG. 10 is a perspective view showing a modification of the connecting rod shown in FIG.

11 is a perspective view showing a modification of the internal reinforcing bar shown in FIG.

FIG. 12 is a longitudinal sectional view corresponding to FIG. 3, showing another embodiment of the coupler.

13 is an exploded perspective view of the connector shown in FIG.

14 is an explanatory view of a method of connecting divided blocks by the connector shown in FIG.

15 is a perspective view showing a modification of the coupler shown in FIG.

16 is a longitudinal sectional view corresponding to FIG. 3, showing a modification of the coupler shown in FIG.

FIG. 17 is a longitudinal sectional view corresponding to FIG. 3, showing another embodiment of the coupler.

18 is an exploded perspective view of the connector shown in FIG.

FIG. 19 is an explanatory diagram of a method of connecting divided blocks by the connector shown in FIG.

FIG. 20 is a vertical sectional view corresponding to FIG. 3, showing another embodiment of the coupler.

21 is an exploded perspective view of the connector shown in FIG.

22 is an explanatory diagram of a method of connecting divided blocks by the connector shown in FIG.

23 is a longitudinal sectional view corresponding to FIG. 3, showing another embodiment of the coupler.

FIG. 24 is an exploded perspective view of the connector shown in FIG.

FIG. 25 is an explanatory view of a method of connecting divided blocks by the connector shown in FIG. 23.

FIG. 26 is a longitudinal sectional view corresponding to FIG. 3, showing another embodiment of the coupler.

27 is an exploded perspective view of the coupler shown in FIG. 26. FIG.

FIG. 28 is an explanatory diagram of a method of connecting divided blocks by the connector shown in FIG. 26.

FIG. 29 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 30 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 31 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 32 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 33 is a perspective view showing another embodiment of the concrete block connection structure.

FIG. 34 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 35 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 36 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 37 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 38 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 39 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 40 is an explanatory diagram of a block connecting method that can be used when building a concrete structure.

FIG. 41 is an explanatory diagram of a block connecting method that can be used when building a concrete structure.

FIG. 42 is an explanatory diagram of a block connecting method that can be used when constructing a concrete structure.

FIG. 43 is an explanatory diagram of a block connecting method that can be used when building a concrete structure.

FIG. 44 is an explanatory diagram of a conventional block connecting method.

[Explanation of Codes] DB1, DB2 ... Divided block, 10 ... Internal rebar, 30
... connecting rod, 30a ... male screw part, 31 ... corrugated reinforcing member, 32 ... bar-shaped reinforcing member, 33 ... bar-shaped reinforcing member, CL ...
Center line of connecting rod, HM ... hardening material, 40 ... recess, 90
... Coupler, 91 ... Guide member, 91b ... Insertion port, 91c
... Insertion hole, 91d ... Step, 91e ... Nut-shaped part, 91
f ... Female screw hole, 92 ... Tightening member, 92a ... Female screw hole, 92b ... Circular collar.

─────────────────────────────────────────────────── ─── Continued Front Page (58) Fields surveyed (Int.Cl. ⁷ , DB name) E02D 29/02 E02B 5/02 E03F 1/00-11/00 E04B 1/38 E04B 1/04

Claims (2)

(57) [Claims] 1. A concrete block comprising two or more concrete blocks.
Adjacent first and second concrete blocks
It is a retaining wall block composed by connecting
A plurality of recesses having openings on the connection surface side and the side surface side.
1 Concrete block and male screw part provided at the tip are exposed in each recess
Multiple buried in the first concrete block
The first connecting rod and a plurality of recesses having openings on the connecting surface side and the side surface side.
Second concrete provided corresponding to the recess of the cleat block
The boot block and the male thread on the tip are exposed in the recesses.
Embedded in the second concrete block as
The second connecting rod of and the female screw hole where the male screw end of the first connecting rod can be screwed
It has a male screw part on the outer surface and a female screw hole.
The first connecting rod is screwed into the male threaded portion at the tip to make the first connecting rod.
A first tightening member attached to each connecting rod, and an insertion hole having a diameter slightly larger than the outer diameter of the second connecting rod.
And a male screw on the outer surface of the first tightening member
There is a female screw hole that can be screwed into the
Then insert the insertion hole into the male thread on the tip of the second connecting rod.
The second tightening part that covers each of the second connecting rods.
Material and second tightening member over the second connecting rod
The second connecting lock can be obtained by screwing the male thread on the tip of the connecting rod.
Is attached to each of the
Directs toward the tip of the second connecting rod of the second tightening member by contact.
And a nut for limiting the movement direction of Cow, connecting surface and the second concrete first concrete block
Assemble the connecting surfaces of the blocks so that the recesses of the blocks match.
The second tightening on the second connecting rod
Rotate the attachment member to attach the female screw hole to the first connecting rod.
On the external thread part of the attached first tightening member
The second connecting rod of the connecting rods facing each other
Install the nut that brings the connecting rod into contact with the step on the second tightening member.
Through the first connecting rod direction and the first connecting
Direction of second connecting rod through first tightening member
Of the first concrete block by pulling
The connecting surface and the connecting surface of the second concrete block are pressed together.
Cage, first, the recess of the second concrete blocks each concrete
There are multiple pieces on the inner and outer surfaces of the toe block,
Pull with the first and second concrete blocks connected.
The number of recesses on the side where the tension force acts depends on the compression force
There are more recesses on the surface side, and the surface side on which the tensile force acts
The same thickness as the connecting rod is used on the surface side where the compression force acts.
The same tightening member and the first nut are used.
And a second tightening member and a second nut
A connector of the same size is used as the coupler , and a first screw member is provided at the end of the external male screw portion of the first tightening member.
1. External thread part of tightening member and female part of second tightening member
Second tightening member in a state where it is screwed into the screw hole and tightened
Is provided with an annular collar facing the end face of the first connecting member before the first tightening member is covered with the first connecting rod.
The first connecting lock can be mounted by screwing it onto the male thread on the tip of the connecting rod.
Tighten with the first fixing nut attached to each
After tightening, the first tightening member is fixed, and the second tightening member
Before covering the second connecting rod with the male end of the second connecting rod.
Attached to each second connecting rod by screwing on the screw part
Second tightening after tightening with the fixed second fixed nut
Retaining wall block characterized in that the retaining member is fixed . 2. Two or more concrete blocks are substantially L-shaped
Adjacent first and second concrete blocks
It is a retaining wall block composed by connecting
A plurality of recesses having openings on the connection surface side and the side surface side.
1 Concrete block and male screw part provided at the tip are exposed in each recess
Multiple buried in the first concrete block
The first connecting rod and a plurality of recesses having openings on the connecting surface side and the side surface side.
Second concrete provided corresponding to the recess of the cleat block
The boot block and the male thread on the tip are exposed in the recesses.
A plurality of which are embedded in the second concrete over heat block to so that
The second connecting rod of and the female screw hole where the male screw end of the first connecting rod can be screwed
It has a male screw part on the outer surface and a female screw hole.
The first connecting rod is screwed into the male threaded portion at the tip to make the first connecting rod.
A first tightening member attached to each connecting rod, and an insertion hole having a diameter slightly larger than the outer diameter of the second connecting rod.
And a male screw on the outer surface of the first tightening member
There is a female screw hole that can be screwed into the
Then insert the insertion hole into the male thread on the tip of the second connecting rod.
The second tightening part that covers each of the second connecting rods.
Material and second tightening member over the second connecting rod
The second connecting lock can be obtained by screwing the male thread on the tip of the connecting rod.
Is attached to each of the
Directs toward the tip of the second connecting rod of the second tightening member by contact.
And a nut for limiting the movement direction of Cow, connecting surface and the second concrete first concrete block
Assemble the connecting surfaces of the blocks so that the recesses of the blocks match.
The second tightening on the second connecting rod
Rotate the attachment member to attach the female screw hole to the first connecting rod.
On the external thread part of the attached first tightening member
The second connecting rod of the connecting rods facing each other
Install the nut that brings the connecting rod into contact with the step on the second tightening member.
Through the first connecting rod direction and the first connecting
Direction of second connecting rod through first tightening member
Of the first concrete block by pulling
The connecting surface and the connecting surface of the second concrete block are pressed together.
Cage, first, the recess of the second concrete blocks each concrete
There are multiple pieces on the inner and outer surfaces of the toe block,
Pull with the first and second concrete blocks connected.
The number of recesses on the surface where the tension force acts and the compression force act
The number of recesses on the surface side is the same, and the surface on which the tensile force acts
The connecting rod is thicker on the side than on the side where the compressive force acts.
And a first tightening member and a first nut.
And a second tightening member and a second nut
A large connector that corresponds to the thickness of the connecting rod
It is used, and at the end of the external male thread of the first tightening member,
1. External thread part of tightening member and female part of second tightening member
The second clamping member in a state where the fastening screwed a screw hole
Is provided with an annular collar facing the end face of the first connecting member before the first tightening member is covered with the first connecting rod.
The first connecting lock can be mounted by screwing it onto the male thread on the tip of the connecting rod.
Tighten with the first fixing nut attached to each
After tightening, the first tightening member is fixed, and the second tightening member
Before covering the second connecting rod with the male end of the second connecting rod.
Attached to each second connecting rod by screwing on the screw part
Second tightening after tightening with the fixed second fixed nut
Retaining wall block characterized in that the retaining member is fixed .