JP2649031B2 - Watertight connection device for concrete block and watertight connection method using the same - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a concrete block waterproof connection apparatus for connecting concrete blocks to each other while securing water blocking. The present invention also relates to a waterproof connection method for connecting concrete blocks to each other using the waterproof connection device.

[0002]

2. Description of the Related Art Taking a concrete block, for example, a box culvert, as an example, the following connection method has been conventionally proposed as a connection method for securing water stoppage at a connection portion and connecting them together.

In the connecting method, as shown in FIG. 24, a concave portion b is provided at an intermediate portion between four inner corners of a box culvert a, and a connecting portion is connected to the four corners of the box culvert so as to communicate with the concave portion b. A connection hole c for inserting the shaft is provided. However, in order to connect the box culverts to each other, an elastic soft waterproof material d is adhered to one end of the culvert in the circumferential direction, and at the connecting portion of the box culvert, as shown in FIG. Water is stopped by compressing the water material, and a screw shaft portion f at one end of a connection shaft e inserted through an insertion hole of a box culvert to be connected is protruded into the concave portion b. A washer g is fitted in the portion f, and a nut h is screwed and screwed into the screw shaft portion f. Thereafter, the connection hole c is filled with grout, and the concave portion is closed with a mortar i for connection. The structure was buried in the mortar.

[0004]

However, when the above-mentioned connecting method is used, the water stopping at the connecting portion of the block relies on the water stopping based on the elastic compression of the elastic soft water stopping material attached to the end face of the culvert. If the water-stopping material is not adhered with sufficient accuracy so as not to be twisted when the water-stopping material is applied, there is a possibility that the water stoppage becomes uncertain. In addition, as for the connection structure, it takes time to fill the connection holes with grout and fill the recess with mortar, and it is difficult to apply the mortar particularly when the construction to close the recess has an upward posture. There was a problem. In addition, the formation of the recesses at the four inside corners of the box culvert results in the rebar buried inside the box culvert being interrupted at that portion, which is not preferable from the viewpoint of reinforcing the block.

[0005] As described above, the conventional connection method has poor reliability of water stoppage at the connection portion, and requires much labor for attaching an elastic waterstop to the end face of the culvert and filling mortar into the recess. In addition to the problem that the construction efficiency was poor, there was also a problem that the formation of the concave portion interrupted the rebar.

SUMMARY OF THE INVENTION An object of the present invention is to provide a watertight connection device for concrete blocks that can solve the above-mentioned problems, and to provide a watertight connection between concrete blocks using the same. It is intended to provide a construction method.

[0007]

The present invention employs the following means to solve the above-mentioned problems. A watertight connection device for a concrete block according to the present invention (hereinafter referred to as a waterstop connection device) connects a concrete block with a connection shaft, a plate attached to an end portion of the connection shaft, and the connection shaft. This is a water-stop connecting device that is connected and connected using a connecting nut to be connected. The connecting surface of the block is provided with a continuous groove in the connecting surface length direction. When the connecting surfaces of the blocks are in contact with each other, the opposing grooves match, and the block connecting portion has a stop. A filling hole is formed in a portion requiring water, and a linear connection hole opened by the concave groove is provided in the block in the block width direction. The connecting shaft has screw shaft portions at both end portions and can be loosely inserted into the connecting hole. The length of the connecting shaft is such that the screw shaft portion is at the end of the connecting hole in the loosely inserted state. The groove is set so as to protrude from the groove (including a state in which the groove protrudes slightly from the end of the groove). Further, the plate has an insertion hole through which the screw shaft portion can be inserted, and can be in contact with an opening edge peripheral portion of the connection hole. The connection nut is open at both ends, and a screw shaft portion of the connection shaft can be screwed into each of a portion on one end and a portion on the other end.

In the above water stopping connection device, it is preferable that a cylindrical portion which has a through hole through which the connecting rod can be inserted and which is inserted substantially closely into the connecting hole is provided at the periphery of the through hole on the back surface of the plate. Good.

In each of the above water shutoff coupling devices, a screw nut can be screwed into the screw shaft portion so as to press the plate against the peripheral edge of the opening end of the connection hole, and the screw projecting from the screw nut. The connection nut may be screwed to the shaft.

In each of the above-mentioned water-stop connecting devices, the groove is expanded in the width direction of the connecting surface at the portion where the end of the connecting hole is present, so that the screw shaft portion of the connecting shaft is present in the expanded portion. Good.

[0011] In each of the above water-stop connecting devices, the block is provided with a fitting groove on the connecting surface thereof so as to sandwich the concave groove from both sides, and an elastic soft water stop protruding from the connecting surface at the bottom of the fitting groove. The base portion of the material is preferably fixed so that the elastic soft waterproof material surrounds the concave groove.

[0012] The water blocking connection method for a concrete block according to the present invention (hereinafter referred to as a water blocking connection method) is provided by using a concrete block, a connection shaft, a plate and a connection nut which constitute the connection device. A plurality of blocks are connected and integrated. First, the connecting shaft is loosely inserted into the connecting hole of the base block laid on the foundation, and the screw shaft at one end of the connecting shaft is protruded from the outer end of the connecting hole. The screw shaft is fastened to the peripheral edge of the outer end of the connection hole, and the screw shaft at the other end of the connection shaft is protruded from the inner end of the connection hole so that the screw shaft is inserted into the groove of the connection surface. After the screw shaft portion is inserted through the insertion hole of the plate, a portion of one end of the connection nut is screwed and tightened to the screw shaft portion, and the plate is connected to the peripheral edge of the opening end of the connection hole. Abut the part. Thereafter, one or a plurality of blocks are connected to each block through the connection holes, and filling holes are formed by matching the opposing concave grooves, and the blocks are laid on the foundation in a continuous state. The connecting shaft is loosely inserted into the hole, the screw shaft at one end of the connecting shaft is screwed into the other end of the connecting nut, and the screw shaft at the other end of the connecting shaft is Projecting into the concave groove of the connecting surface of the continuous block located at the portion. Then, the one end side of the connection nut is screwed into the screw shaft portion and tightened to bring the plate into contact with the peripheral edge of the opening end of the connection hole. One or a plurality of blocks are similarly laid on the foundation in the connected block in the connected state, and when the connected block located at the end is an intermediate block, the same process as described above is performed. After that, the one end portion of the connection nut is screwed to the screw shaft portion protruding into the concave groove and tightened to bring the plate into close contact with the opening end peripheral portion of the connection hole. When the connecting block located at the end is the terminal block, the screw shaft at the other end of the connecting shaft is projected from the outer end of the connecting hole, and a nut is screwed into the screw to tighten the screw. The shaft is fixed to the outer edge of the connection hole. Thereafter, grout is filled into the filling hole and the connection hole from an opening end of the filling hole or an injection hole provided in the block so as to communicate with the filling hole.

In addition to the above-mentioned water-stop connection method, one or a plurality of blocks are formed on the foundation so that the connection holes are communicated with each other, and the filling holes are formed by matching the opposing grooves, so that the blocks are continuously connected. The connection shaft is loosely inserted into the connection hole in the communication state, and a screw shaft portion at one end of the connection shaft is protruded from an outer end portion of the connection hole. While the shaft is fixed to the peripheral portion of the outer end of the connection hole, the screw shaft portion at the other end of the connection shaft is made to protrude from the inner end of the connection hole so as to be present in the concave groove of the connection surface, After the screw shaft portion is inserted through the insertion hole of the plate, a portion on one end side of the connection nut is screwed and tightened to the screw shaft portion, and the plate is brought into contact with the opening edge peripheral portion of the connection hole. Let me know. Thereafter, one or a plurality of blocks are connected to each block through the connection holes, and filling holes are formed by matching the opposing concave grooves, and the blocks are laid on the foundation in a continuous state. The connecting shaft is loosely inserted into the hole, the screw shaft at one end of the connecting shaft is screwed into the other end of the connecting nut, and the screw shaft at the other end of the connecting shaft is After projecting into the concave groove of the connecting surface of the connecting block located at the portion, the portion of the connecting nut at one end side is screwed and tightened to the screw shaft portion, and the plate is connected to the peripheral edge of the opening end of the connecting hole. Abut the part. One or a plurality of blocks are similarly laid on the foundation in the connected block in the connected state, and when the connected block located at the end is an intermediate block, the same process as described above is performed. After that, the one end portion of the connection nut is screwed into the screw shaft portion protruding into the concave groove and tightened to bring the plate into contact with the opening end peripheral portion of the connection hole. When the connecting block located at the end is the terminal block, the screw shaft at the other end of the connecting shaft is projected from the outer end of the connecting hole, and a nut is screwed into the screw to tighten the screw. The shaft is fixed to the outer edge of the connection hole. Thereafter, grout is filled into the filling hole and the connection hole from an opening end of the filling hole or an injection hole provided in the block so as to communicate with the filling hole.

In each of the above-mentioned water-stop connection methods, one end of the connection nut is screwed into the screw shaft portion through which the plate insertion hole is inserted and tightened to bring the plate into contact with the peripheral edge of the opening end of the connection hole. Alternatively, a tightening nut may be screwed into the screw shaft and tightened to bring the plate into contact with the peripheral edge of the opening of the connection hole, and then connected to the screw shaft protruding from the tightening nut. A configuration in which the nut is screwed can be adopted.

[0015] In each of the above water-stop connection methods,
It is preferable that the portion where the end of the connection hole exists is expanded in the width direction of the connection surface, and the screw shaft portion of the connection shaft is provided in the expansion portion.

In each of the above water-stop connection methods, when it is necessary to prevent the grout from leaking when the grout is injected into the filling hole, an elastic soft water-stopping material is adhered so as to surround the groove. It is preferable that the elastic soft waterproof material is compressed using the block, and the connecting surfaces of the block abut against each other.

Further, in each of the above-mentioned water-stop connection methods, it is preferable that the plate is brought into close contact with the entire periphery of the opening end of the connection hole to close the insertion hole.

[0018]

Embodiments of the present invention will be described below with reference to the drawings. In FIGS. 1 and 2, the water stop connection device 1 according to the present invention
The concrete blocks 2 and 2 are connected to each other using a connecting shaft 3 and a plate 5 mounted on an end portion of the connecting shaft, and a connecting nut 6 for connecting the connecting shafts to each other.

The block 2 is configured as, for example, a box-shaped block for constructing a waterway. In this embodiment, an intermediate block 2a for forming an intermediate portion of the waterway and an end block for forming an end portion of the waterway. 2b.

As shown in FIGS. 5 and 6, the intermediate block 2a has a box shape, and has, for example, a trapezoidal recess along the center line of the connecting surface 7 on each of the front and rear connecting surfaces 7,7. A groove 9 is provided in the periphery, and the upper ends of the opposed vertical grooves 9a, 9a extend above the upper horizontal groove 9b and open to the upper end of the block.
In this embodiment, a portion near the upper and lower ends of the vertical groove 9a is expanded in the width direction of the connection surface to form a groove expansion portion 10. The front and rear upper groove expansion portions 10a and 10a and the lower groove expansion portions 10b and 10b are located at the same height position. The fitting groove 11 is provided along the inner peripheral edge of the concave groove, and the fitting groove 11 is provided along the outer edges of both the vertical concave grooves 9a, 9a and the lower horizontal groove 9c. A fitting groove 11 is provided along the outer edge of the upper horizontal groove 9b, and both ends of the fitting groove 11 are located inside the vertical grooves 9a, 9a and are bent upward to open to the upper end of the block. ing. In this way, the fitting groove is provided on the connecting surface so as to sandwich the concave groove from both sides.

In the portions near the upper and lower ends of the side walls 12, 12, linear connecting holes extending in the front-rear direction (width direction) of the block and having both ends opened at the bottom surface of the groove extending portion 10. 13 are provided. In the intermediate block 2a having such a configuration, when the connecting surfaces 7, 7 abut against each other, a continuous filling hole 15 (FIGS. 1, 6) is formed by matching of the concave grooves 9, 9 facing each other. . In addition, the fitting of the opposed fitting grooves 11, 11 causes
(FIGS. 6 and 10) are formed. As shown in FIG. 6, the intermediate block 2a has a bottom portion 1 of a fitting groove 11 provided on one of the connecting surfaces (the front connecting surface in FIG. 6).
A base portion 20 of an elastic soft waterproof material 19 made of, for example, butyl rubber is adhered to the entire length of the flexible waterproof member 7, and the elastic soft waterproof material 19 is made to protrude from the connection surface 7.

As shown in FIGS. 1 and 2, the end block 2b has a box shape which can be connected to the intermediate block 2a. The connecting surface 7 is provided with a concave groove 9 and a fitting groove 11 in the same manner as in the intermediate block 2a. Therefore, the configuration will be described with reference to FIG. 5. For example, a trapezoidal groove 9 is provided along the center line of the connection surface 7, and the upper ends of the opposed vertical grooves 9 a, 9 a It extends above the lateral groove 9b and opens to the upper end of the block. In the present embodiment, the recessed groove extending portion 10 is formed by extending the portion near the upper and lower ends of the vertical groove 9a in the width direction of the connection surface. A fitting groove 11 is provided along the inner peripheral edge of the concave groove, and a fitting groove 11 is provided along the outer edges of the two vertical concave grooves 9a, 9a and the lower horizontal groove 9c. A fitting groove 11 is provided along the outer edge of the horizontal groove 9b, and both ends of the fitting groove 11 are located inside the vertical groove 9a and bent upward to open to the upper end of the block.

As described above, the fitting surface is provided with the fitting groove so as to sandwich the groove from both sides. Further, linear connecting holes 13 extending in the front-rear direction (width direction) of the block and having both ends opened at the bottom surface of the groove extending portion 10 are provided at the portions near the upper and lower ends of the side walls 12, 12. Have been. On the other hand, since the outer end surface 21 (FIG. 7) of the intermediate block 2a does not serve as a connecting surface, the groove is not provided. Note that FIG. 7 shows a state in which the outer end 22 of the connection hole 13 is open at the bottom surface of the concave portion 23 formed on the outer surface. In the end block 2b having such a configuration, the connecting surface 7 contacts the connecting surface 7 of the intermediate block 2a, and the continuous filling holes 15 (FIG. FIG. 6) is formed.
In addition, the fitting of the opposed fitting grooves 11, 11 forms the water-stop material accommodating portion 16 (FIG. 6). As shown in FIG. 6, a base portion of an elastic soft waterproof material 19 made of, for example, butyl rubber is provided on a bottom portion 17 of the fitting groove 11 provided on the connection surface of the end block, as shown in FIG. 20 is adhered, and the elastic soft waterproof material 19 is made to protrude from the connecting surface 7.

The connecting shaft 3 is made of a reinforcing steel or a PC steel material with both end portions having screw shaft portions 25, 25.
The connection hole 1 is formed to be thinner than the inner diameter of the connection hole 13.
3 can be inserted freely, and its length is set as follows. In the intermediate block 2a, the connection holes 13
The two screw shaft portions 25a and 25b of the connection shaft loosely inserted into the groove are projected from the corresponding connection hole ends and fit in the concave groove expansion portion 10 (FIGS. 9 to 11). In the end block 2b, a screw shaft portion 25a on one end side of the connection shaft loosely inserted into the connection hole 13 projects from the outer end of the connection hole and fits in the recess 23 (FIG. 9). The screw shaft portion 25b on the other end side is set so as to protrude from the inner end of the connection hole and fit in the concave groove extension portion 10.

The plate 5 has a rectangular plate shape, for example.
An insertion hole 2 through which the screw shaft portion 25 can be inserted
6 are provided. In this embodiment, as shown in FIGS. 3 and 4, a tube having a through hole 27 through which the connection shaft 3 can be inserted at the periphery of the insertion hole on the back surface of the plate, and which is inserted almost closely into the connection hole 13. The part 29 is provided in a protruding manner. Then, the plate 5 can be in close contact with the entirety of the opening end peripheral portion 31 of the connection hole on the back surface 30 (FIG. 9). In order to further enhance the close contact state of the plate, as shown in FIG. 4, a rubber packing material 32 is adhered to the back surface of the plate 5 at the contact portion with the peripheral edge of the opening of the connection hole. May be.

As shown in FIGS. 3 and 4, the connecting nut 6 is relatively long with both ends open, and a portion 33 at one end and a portion 35 at the other end are connected to the connecting shaft 3 respectively. Of the screw shaft portion 25 can be screwed.

FIG. 8 shows a plurality of intermediate blocks 2a having the above construction and end blocks 2b, 2b disposed at both ends.
This shows a water channel constructed integrally by using the connecting shaft 3, the plate 5, and the connecting nut 6 having the above configuration. Taking the case of constructing the waterway as an example, the water stop connection method according to the present invention will be described below.

After constructing a concrete foundation 36 at the bottom of the excavation section provided in the waterway construction section, the concrete foundation 36
On the upper side, the end block 2b that forms one end of the waterway to be constructed (or, when the waterway to be constructed is divided into several sections, one end of the channel in the section) is laid. Next, as shown in FIGS. 1 and 9, the connecting shaft 3 is loosely inserted into the connecting hole 13 of the laid block 2b, and the screw shaft portion 25a at one end of the connecting shaft is connected to the outer end of the connecting hole. 22 so that the screw shaft portion 25a
After fitting a washer 37 in contact with the bottom of the recess, the nut 3
8 is screwed. The washer 37 has a grout injection hole 39 and an exhaust hole 40 communicating with the connection hole 13.

The screw shaft portion 25b at the other end of the connecting shaft 3 loosely inserted into the connecting hole 13 projects from the inner end 41 of the connecting hole due to the aforementioned relationship between the length of the connecting shaft and the connecting hole. The screw shaft portion 25b is inserted into the through hole 27 of the cylindrical portion 29 and the through hole 26 of the plate so as to fit in the concave groove expanding portion 10. I do. Thereafter, a portion 33 on one end side of the connection nut 6 is screwed and tightened to the screw shaft portion 25b, and the plate 5 is brought into close contact with the entire opening end peripheral portion 31 of the connection hole,
Close the connection hole 13.

Next, as shown in FIGS. 9 and 10, the intermediate block 2a is inserted into the connection holes 13 and 13 in the block 2b.
The filling hole 15 is formed by matching the opposing grooves (the groove on the end block side and the groove on the intermediate block side) 9, 9, and stopped by the matching of the opposing fitting grooves 11, 11. The water material storage part 16 is formed and the concrete foundation 3
6 is laid in a continuous state. And the intermediate block 2
a screw shaft portion 25a on one end side of the connection shaft 3 loosely inserted into the connection hole 13 of FIG. 3a, is screwed into a portion 35 on the other end side of the connection nut 6, and a screw shaft portion on the other end side of the connection shaft is connected. As shown in FIG. 11, the protrusion 25b projects into the groove extending portion 10 provided on the connection surface of the intermediate block 2a provided continuously. Then, the screw shaft portion 25b is connected to the through hole 27
And the cylindrical portion 29 is inserted into the connecting hole 13 almost in close contact. Thereafter, a portion 33 on one end side of the connection nut 6 is screwed and tightened to the screw shaft 25b, and the plate 5 is brought into close contact with the entire opening end peripheral portion 31 of the connection hole, and the connection hole 13 is closed. .

Another intermediate block 2a is further connected to the connected intermediate block 2a in the same manner, and the same steps (free insertion of the connecting shaft, mounting of the plate, and tightening of the connecting nut) are performed. . This is repeated by the number of the intermediate blocks, and the end blocks 2b are connected to the end portions of the serially provided intermediate blocks as shown in FIG.
3 and a filling hole 15 is formed by matching of the concave grooves 9 and 9 facing each other, and by fitting of the fitting grooves 11 and 11 facing each other, the water blocking material accommodating portion 1 is formed in the same manner as shown in FIG.
6 is formed and laid on the concrete foundation 36 in a continuous state. Similarly, the connecting shaft 3 is loosely inserted into the connecting hole 13 of the end block 2b, and the screw shaft portion 2 at one end thereof is
5a is screwed into the other end 35 of the connection nut 6 at the end, and the screw shaft 25b at the other end of the connection shaft is projected from the outer end 22 of the connection hole and set in the recess 23. Shaft 25
Then, the washer 44 is fitted into the b, and the nut 38 is screwed and tightened. As a result, each connecting shaft is connected in a rod shape via the connecting nut 6 in a state where the plate is pressed, and one end thereof is connected to the outer end of the connecting hole of the end block located at the base end of the water channel. 8 and the other end is fixed to the peripheral portion of the outer end of the connection hole of the end block located at the end of the channel, so that the entire block is integrated as shown in FIG. It is in a state of being connected to.

In the state where the connection is completed, the connection portion including the plate and the connection nut is stored in the storage space 42 formed by the matching of the groove expansion portion. 9 to 11, only the connection hole 13a of one block is in communication with the storage space 42, and the connection hole 13b of the other block is closed by the plate 5. I have. In this embodiment, the fitting grooves 11, 1 facing each other are used.
Since the elastic soft waterproof materials 19, 19 are accommodated in a compressed state in the waterproof material housing portions 16, 16 formed by the matching of 1, 11, 11, the grout is filled in the filling hole as described later. At the time of injection, it is possible to reliably prevent the injection grout from leaking from the contact portion of the connection surface. In this embodiment, since the screw shaft portion 25 of the connection shaft 3 is inserted into the through hole 27 of the cylindrical portion 29 protruding from the plate 5, the axis of the connection shaft 3 is aligned with the hole center of the connection hole 13. A substantially matched state is obtained, whereby the annular gap G surrounds the connecting shaft.
Is formed.

Thereafter, grout is injected into each of the filling holes 15 formed in the block connecting portion.
In the present embodiment, as shown in FIG. 12, grout is injected from one upper end (injection port) 43 of one filling hole opened to the upper end of the block. The filling hole 15 is formed so that the elastic soft waterproof material 19,
Since the grout is enclosed by 19, the injected grout is prevented from leaking to the outside, and is filled in the gap G between the filling hole 15 and the one connecting hole communicating with the filling hole 15. The filling is confirmed by the grout flowing out from the upper end (exhaust hole) 45 of the other filling hole opened to the upper end of the block. A grout inlet 39 provided in the washer 37 is provided in a connection hole of the end block located on the one end side.
More grout is filled.

In the watertight connection method according to the present invention, as shown in FIG. 13, one or a plurality of intermediate blocks 2a (one in the figure) is provided at an end block 2b forming one end of a water channel. Are connected to each other so that each of the connection holes is in communication with each other and a filling hole is formed by matching of the opposing concave grooves, and one or a plurality of ( Similarly, two intermediate blocks (two in the figure) may be similarly connected. In this case, the procedure of the water stop connection is as follows. The configuration of each part is partially described in the same manner as in this case.
11 is performed.

The connecting shaft 3 is loosely inserted into the connecting hole 13 of the intermediate block 2a which is in communication with the connecting hole 13 of the end block 2b, and the screw shaft portion 25a at one end of the connecting shaft is connected to the end block. It is made to protrude from the outer end of the connection hole, and a washer 37 having the same configuration as above is fitted to this, and a nut 38 is screwed in. The screw shaft portion 25a is fixed to the peripheral portion of the outer end of the connection hole.

The screw shaft 25b on the other end of the connecting shaft is connected to the groove of the block (for example, the groove extending portion 10 having the same structure as described above).
9 and the screw shaft portion 25b
Is inserted through the through hole 27 of the cylindrical portion 29 and the through hole 26 of the plate, and the cylindrical portion 29 is inserted into the connecting hole 13 almost in close contact. Thereafter, a portion 33 on one end side of the connection nut 6 is screwed and tightened to the screw shaft portion 25b, and the plate 5 is brought into close contact with the entire opening end peripheral portion 31 of the connection hole.
Close the connection hole 13.

After that, two other intermediate blocks are connected to the intermediate block 2a by making the connection holes thereof communicate with each other, and the filling holes 15 are formed by matching the opposing concave grooves 9, 9. The connection shaft 3 is loosely inserted into the connection hole in the communicating state, and the screw shaft portion 25 a on one end of the connection shaft is screwed into the portion 35 on the other end of the connection nut 6. This is repeated below. Similarly to the above, the end block 2b is connected to the connecting block located at the end, and the screw shaft portion 25b on the other end side of the connecting shaft 3 connected via the connecting nut 6 is connected to the outside of the connecting hole. It is made to protrude from the end to be present in the concave portion 23, the washer 44 is fitted to the screw shaft portion 25 b, and the nut 38 is screwed and tightened. Attach to the part to complete the connection of the blocks. Then, in the same manner as described above, the filling hole 1
5 and the gap G between the connection holes are filled with grout. In this case, when grout is filled in the filling hole formed in the connecting portion between the end block and the intermediate block forming one end of the water channel, the grout is filled in the connecting holes 13, 13 of both blocks. Becomes

Other Embodiments (1) FIGS. 14 to 15, FIGS. 16 to 17, FIGS.
0 to 21 show other examples of blocks used in the present invention.

FIGS. 14 and 15 show blocks used for construction of a septic tank, for example. The block 2 is provided with a pedestal portion 52 having a toe portion 50 and a heel portion 51 at the lower end of an upright vertical wall portion 49.
A receiving portion 55 for receiving an end of the horizontal plate 53 is provided on the inner surface of the projection 9. The connecting surfaces 7, 7 at both ends of the block are provided with concave grooves 9 which open upward and extend linearly downward to reach near the lower end of the pedestal portion 52 along the center line of the connecting surface. The upper and lower portions near the upper and lower ends of the concave groove 9 and the upper and lower two portions of the intermediate portion thereof are expanded in the width direction of the connecting surface to form the same concave groove expanding portion 10 as described above.

The block 2 is provided with a straight connecting hole 13 extending in the block width direction and having both ends opened at the bottom surface of the concave groove extending portion 10. The connecting surface 7 is provided with a fitting groove 11 for fitting an elastic soft waterproof material 19 made of, for example, butyl rubber so as to surround the concave groove 9 in a U-shape except for the upper end thereof. When the connecting surfaces are in contact with each other, the filling holes 15 are formed by the mating of the opposing concave grooves 9, 9, and the mating grooves 1
The water-stop material accommodating portion 16 for accommodating the elastic soft water-stop material 19 in a compressed state is formed by the coincidence of 1 and 11.

Using the block, the connecting shaft, the plate, and the connecting nut having the above-described configuration, the procedure for connecting the blocks while securing the water stop at the connecting portion is the same as that in the above embodiment. In this case, for example, a grout injection hole 54 is continuously provided at the lower end of the filling hole.

FIGS. 16 and 17 show blocks used for retaining walls, for example. The block 2 has an L-shape, and its connecting surface 7 is provided with a concave groove 9 which is bent in an L-shape continuously in the longitudinal direction of the connecting surface. The groove extending portion 10 is expanded in the width direction of the connecting surface to form the same groove extending portion 10 as described above.

The block 2 is provided with a linear connecting hole 13 extending in the block width direction and having both ends opened at the bottom surface of the concave groove extending portion 10. The connecting surface 7 is provided with a fitting groove 11 for fitting an elastic soft waterproof material 19 made of, for example, butyl rubber so as to surround the concave groove 9. Then, in a state where the connecting surfaces are in contact with each other, the filling hole 15 is formed by the matching of the concave grooves 9, 9 facing each other, and the fitting of the fitting grooves 11, 11 facing each other.
A water-stop material accommodating portion 16 for accommodating the elastic soft water-stop material 19 in a compressed state is formed.

Using the block, the connecting shaft, the plate, and the connecting nut having the above-described configuration, the procedure for connecting the blocks while securing the water stop at the connecting portion is the same as in the above-described embodiment. In this case, for example, the grout injection hole 56 is continuously provided at the lower end of the filling hole, and the exhaust hole 57 is continuously provided at the upper end of the filling hole.

FIGS. 18-19 show blocks used for gutters, for example. The block 2 has a U-shape, is provided with a concave groove 9 bent in a U-shape along the center line of the connecting surface 7, and an intermediate portion of the concave groove 9, for example, a vertical portion is connected. A groove extending portion 10 similar to the above is formed by expanding in the width direction of the surface.

The block 2 is provided with a linear connecting hole 13 extending in the block width direction and having both ends opened at the bottom surface of the concave groove extending portion 10. The connecting surface 7 is provided with a fitting groove 11 for fitting an elastic soft waterproof material 19 made of, for example, butyl rubber so as to sandwich the groove from both sides along the inner and outer edges of the groove 9. Become. When the connecting surfaces are in contact with each other, the filling hole 15 is formed by the matching of the concave grooves 9 and 9 facing each other, and the elastic and soft waterproof material 19 is formed by the matching of the fitting grooves 11 and 11 facing each other.
Is formed in a compressed state to form a water-stopping material housing portion 16.

Using the block, the connecting shaft, the plate, and the connecting nut having the above-described configuration, the procedure for connecting the blocks while securing the water stop at the connecting portion is the same as in the above embodiment.

FIGS. 20 to 21 show, for example, manhole blocks. The block 2 has a cylindrical shape and is provided with a circular concave groove 9 along the center line of the joint surface 7. For example, front, rear, left and right of the concave groove 9 are expanded in the width direction of the connecting surface, The groove extending portion 10 is the same as described above.

The block 2 is provided with a linear connection hole 13 extending in the block width direction (vertical direction) and having upper and lower ends opened at the bottom surface of the groove extending portion 10.
The connecting surface 7 is provided with a fitting groove 11 for fitting an elastic soft waterproof material 19 made of, for example, butyl rubber so as to sandwich the groove from both sides along the inner and outer edges of the groove 9. Become.
In the state where the connecting surfaces are in contact with each other, the filling hole 15 is formed by the matching of the upper and lower concave grooves 9, 9 facing each other, and the elastic soft stopper is formed by the matching of the upper and lower fitting grooves 11, 11 facing each other. A water-stop material accommodating portion 16 for accommodating the water material 19 in a compressed state is formed.

Using the block, the connecting shaft, the plate, and the connecting nut having the above-described configuration, the procedure for connecting the blocks while securing the water stop at the connecting portion is the same as in the above embodiment. In this case, for example, a grout injection hole 59 and an exhaust hole 60 are provided continuously at a position facing the filling hole.

(2) In the watertight connection method according to the present invention, the intermediate block may be used as an end block. FIG. 22 shows an example of this, in which a screw shaft portion 25a on one end side of a connecting shaft is projected into a groove (for example, a groove extending portion 10 configured in the same manner as described above) 9, and the projected screw shaft is formed. The washer 37 is fitted into the portion 25a in the same manner as described above, and the nut 38 is screwed and tightened. When the end block has a concave groove as described above, for example, when extending the end of the structure by cast-in-place construction, the concave groove 9 improves the adhesive strength with the cast-in-place concrete.

(3) FIG. 23 shows the watertight connection method according to the present invention in which the one end portion of the connection nut is screwed and tightened to the screw shaft portion 25 inserted through the insertion hole 26 of the plate 5. Alternatively, a tightening nut 61 is screwed into the screw shaft portion 25 and tightened, and then the connection nut 6 is screwed into a screw shaft portion protruding from the tightening nut 61.
In this case, the connecting shaft can be easily tensioned by grasping the screw shaft at the end thereof, and the tightening nut can be screwed in this state.

(4) In the present invention, the plate 5 may not be provided with a tubular portion.

(5) In the present invention, if the width of the groove provided on the connecting surface is wide to some extent, the groove may not be provided with the extension.

[0055]

According to the present invention, a filling hole is formed in the connecting portion of the blocks continuously provided in the longitudinal direction thereof. The connecting shafts, which are inserted through the connecting holes formed in the width direction of the block and open to the filling holes, are connected to each other with the connecting nuts at the filling hole portions. At this time, the connecting nuts are used or tightened. The plate fitted to the end portion of the connection shaft is pressed against the peripheral edge portion of the opening of the connection hole by using an attached nut. The plate is preferably brought into close contact with the entire periphery of the opening end to close the connection hole. The present invention employing such a configuration has the following excellent effects.

The present invention does not connect the whole blocks at once, but connects the connection blocks sequentially in partial portions, so that the connection of each part can be performed reliably and uniformly.

When grout is injected into the filling hole, grout is naturally filled into the filling hole and the connecting hole, and the block connecting portion is water-stopped, the connecting shaft is rust-proofed, and the connecting shaft and the block are integrated. And the filling process of the connecting portion can be performed simultaneously. Conventionally, the filling process of the connecting portion is performed by applying mortar, and the integration of the block and the connecting shaft and the rust-proofing process of the connecting shaft are performed by grouting the connecting hole, and furthermore, the block is stopped. Although the water treatment was performed by attaching an elastic soft waterproof material to the connecting surface of the block, according to the present invention, these individual steps can be performed simultaneously, and compared with the conventional construction method, Simplification and reduction of construction cost can be expected.

In particular, when the plate is configured so as to close the connection hole, grout can be filled by partitioning the whole into partial portions, so that the filling can be easily and reliably performed. If grout is injected from a specific location to fill all filling holes and all connecting holes with grout, it is difficult to spread grout simultaneously to each part because grout is viscous. It takes a long time for filling and tends to cause non-uniform filling.

As the filled grout hardens, a highly reliable water stop is achieved at the interconnected portions of the blocks by the cured grout. The connection structure of the reinforced concrete can be constituted by the hardening of the grout at the connection portion of the connection shaft. In the connection hole, the block and the connection shaft are integrated with each other through the cured grout. Further, since the grout hardened material covers the connecting shaft, corrosion of the connecting shaft is prevented. In addition, in the filling hole, since the grout hardened material is formed straddling both blocks, the hardened material also functions as a shear reinforcing material for a block connecting portion. From the above, according to the present invention, the block is strongly connected because the shearing resistance of the hardened material of the filling hole is added to the connection strength of the reinforced concrete structure integrated with the block. This strong connection state is maintained for a long period of time because corrosion of the connection shaft is prevented.

In forming a connecting portion of a block, a concave portion is conventionally formed in an intermediate portion of an inner surface portion of a block, whereas a concave groove is formed in an end surface of the block in the present invention. Therefore, according to the present invention,
There is no problem of interrupting the reinforcing bar unlike the conventional case.

In particular, when a cylindrical portion through which the screw shaft portion of the connecting shaft is inserted is protruded from the plate, the cylindrical portion is inserted into the connecting hole in a substantially close state so that the axis of the connecting shaft is aligned with the axis of the connecting hole. Can be substantially matched. Therefore, the periphery of the connection shaft can be stably covered with the grout hardened material having substantially the same thickness. In addition, since the axis of the connection nut screwed to the screw shaft portion can substantially match the axis of the connection hole, the blocks are connected to each other and then inserted into the connection hole of the connected block. When screwing the screw shaft of the connection shaft to the connection nut, there is an advantage that the screw shaft of the connection shaft can be easily adjusted to the screw portion of the connection nut.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view illustrating a waterproof connection apparatus and a waterproof connection method using the same according to the present invention.

FIG. 2 is an exploded perspective view illustrating a water blocking connection device.

FIG. 3 is a perspective view illustrating a state in which the connecting shafts are connected to each other using a plate and a connecting nut.

FIG. 4 is a cross-sectional view illustrating a state in which a plate is brought into contact with an opening edge peripheral portion of a connection hole via a packing material.

FIG. 5 is a perspective view illustrating a box-shaped block.

FIG. 6 is a partial perspective view illustrating a connection surface of the box-shaped block.

FIG. 7 is a partial perspective view illustrating another example of a block.

FIG. 8 is a perspective view illustrating a water channel constructed by applying the present invention.

FIG. 9 is a cross-sectional view illustrating a connection state between an end block and an intermediate block.

FIG. 10 is a cross-sectional view illustrating a connection state between an end block and an intermediate block.

FIG. 11 is a cross-sectional view illustrating a connection state of the intermediate blocks.

FIG. 12 is a plan view illustrating a connection state between an intermediate block and an end block.

FIG. 13 is a perspective view illustrating another embodiment of a water channel constructed by applying the present invention.

FIG. 14 is a side view illustrating another mode of the block.

FIG. 15 is a partial perspective view thereof.

FIG. 16 is a side view illustrating another mode of the block.

FIG. 17 is a partial perspective view of the same.

FIG. 18 is a side view illustrating another mode of the block.

FIG. 19 is a partial perspective view thereof.

FIG. 20 is a plan view illustrating another mode of the block.

FIG. 21 is a partial perspective view of the same.

FIG. 22 is a cross-sectional view illustrating a water stop connection method when a block having concave grooves formed at both ends is used at an end.

FIG. 23 is a cross-sectional view illustrating a state in which a tightening nut is screwed into a screw shaft portion of the connecting shaft and tightened, and a portion of one end of the connecting nut is screwed into a screw shaft portion protruding from the tightening nut. is there.

FIG. 24 is a perspective view illustrating a box culvert used in a conventional connection method.

FIG. 25 is a plan view illustrating a conventional connection method.

[Explanation of symbols]

 DESCRIPTION OF REFERENCE NUMERALS 1 water-stop connecting device 2 block 3 connecting shaft 5 plate 6 connecting nut 7 connecting surface 9 concave groove 10 concave groove extending portion 11 fitting groove 13 connecting hole 15 filling hole 16 water-stop material accommodating portion 19 elastic soft water-stop material 25 screw Shaft 26 Insertion hole 27 Through hole 29 Tube part 31 Open end peripheral part 32 Rubber packing material 37 Washer 38 Nut

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁶ Identification number Agency reference number FI Technical display location E04B 1/684 E04B 1/68 A

Claims (11)

(57) [Claims] 1. A water-stop connecting device for connecting concrete blocks to each other by using a connecting shaft, a plate mounted on an end portion of the connecting shaft, and a connecting nut for connecting the connecting shafts to each other. Te, the block has, on its coupling surface, grooves are provided continuously to the coupling face length direction, the coupling surface mutually contacting state of the block, facing concave groove matches, sales of blocks connecting portion
A filling hole is formed in a portion requiring water stoppage, and a linear connecting hole opened by the concave groove is provided in the block in the block width direction, and the connecting shaft is , Having a screw shaft portion at both end portions, which can be loosely inserted into the connection hole, and whose length is such that the screw shaft portion protrudes from the end of the connection hole in the concave groove in the loosely inserted state. The plate has an insertion hole through which the screw shaft portion can be inserted, and can be brought into contact with a peripheral edge of an opening end of the connection hole. The connection nut has both ends open and one end thereof A water blocking connection device for a concrete block, wherein a screw shaft portion of the connection shaft can be screwed into each of the side portion and the other end portion. 2. A cylindrical portion which has a through hole through which the connecting rod can be inserted and which is inserted substantially closely into the connecting hole at a peripheral portion of the through hole on the back surface of the plate. The watertight connection device for a concrete block according to claim 1. 3. The watertight connection device for a concrete block according to claim 1, wherein a tightening nut for pressing the plate against the opening end peripheral portion of the connection hole can be screwed into the screw shaft portion, and The watertight connection device for a concrete block, wherein the connection nut can be screwed into a screw shaft protruding from the fastening nut. 4. The groove according to claim 1, wherein the groove extends in the width direction of the connection surface at a portion where the end of the connection hole exists, and the screw shaft portion of the connection shaft is located at the expansion portion. Item 5. The watertight connection device for concrete blocks according to Item 1, 2 or 3. 5. The block is provided with a fitting groove on its connecting surface so as to sandwich the groove from both sides, and at the bottom of the fitting groove,
The concrete according to claim 1, 2, 3, or 4, wherein a base end portion of the elastic soft waterproof material protruding from the connection surface is fixed, and the elastic soft waterproof material surrounds the concave groove. Watertight coupling device for blocks. 6. A waterproof connection method according to claim 1, wherein a plurality of concrete blocks are connected and integrated using a concrete block, a connecting shaft, a plate, and a connecting nut. The connecting shaft is loosely inserted into the connecting hole of the laid base end block, and a screw shaft at one end of the connecting shaft is protruded from the outer end of the connecting hole. Is fixed to the peripheral portion of the outer end of the connection hole, while the screw shaft portion at the other end of the connection shaft is made to protrude from the inner end of the connection hole to be present in the concave groove of the connection surface. After the screw shaft portion is inserted into the insertion hole of the plate, a portion of one end of the connection nut is screwed into the screw shaft portion and tightened, and the plate is brought into contact with the opening edge peripheral portion of the connection hole. , Then one or more blocks in the block,
The connection holes are communicated with each other, the filling holes are formed by matching the opposing concave grooves, the connection holes are laid on the foundation in a continuous state, and the connection shaft is loosely inserted into the connection hole in the communication state, and the connection shaft is The screw shaft at one end of the connection nut is screwed into the other end of the connection nut, and the screw shaft at the other end of the connection shaft is connected to the groove on the connection surface of the connecting block located at the end. After protruding inside,
One end portion of the connection nut is screwed and tightened to the screw shaft portion, and the plate is brought into contact with the opening end peripheral edge portion of the connection hole. When the blocks are laid on the foundation in a continuous state, and the continuous block located at the end is an intermediate block, through the same process as above, it is connected to the screw shaft portion projecting into the groove. One end of the nut is screwed and tightened to bring the plate into close contact with the peripheral edge of the open end of the connection hole.If the end of the continuous block located at the end is connected, The screw shaft on the other end of the shaft is projected from the outer end of the connection hole,
A nut is screwed and tightened to fix the screw shaft portion to the outer peripheral portion of the connection hole. Thereafter, the open end of the filling hole or the open end of the filling hole is connected to the filling hole and the connecting hole. A grout is filled from an injection hole provided in the block so as to communicate with the filling hole. 7. A waterproof connection method according to claim 1, wherein a plurality of concrete blocks are connected and integrated by using a concrete block, a connecting shaft, a plate, and a connecting nut. One or a plurality of blocks are connected to each other, the filling holes are formed by matching the opposing concave grooves, and the blocks are laid in a continuous state, and the connecting shaft is loosely inserted into the communicating holes. And a screw shaft portion at one end of the connection shaft,
The screw shaft is projected from the outer end of the connection hole, and a nut is screwed onto the protrusion to fix the screw shaft to a peripheral portion of the outer end of the connection hole. After projecting from the inner end of the hole to be present in the concave groove of the connecting surface, the screw shaft is inserted through the insertion hole of the plate, and then the one end of the connecting nut is screwed into the screw shaft. Then, the plate is brought into contact with the periphery of the opening end of the connection hole, and then one or more blocks are attached to the block.
The connection holes are communicated with each other, the filling holes are formed by matching the opposing concave grooves, the connection holes are laid on the foundation in a continuous state, and the connection shaft is loosely inserted into the connection hole in the communication state, and the connection shaft is The screw shaft at one end of the connection nut is screwed into the other end of the connection nut, and the screw shaft at the other end of the connection shaft is connected to the groove on the connection surface of the connecting block located at the end. After protruding inside,
One end portion of the connection nut is screwed and tightened to the screw shaft portion, and the plate is brought into contact with the opening end peripheral edge portion of the connection hole. When the blocks are laid on the foundation in a continuous state, and the continuous block located at the end is an intermediate block, through the same process as above, it is connected to the screw shaft portion projecting into the groove. One end of the nut is screwed and tightened to bring the plate into contact with the peripheral edge of the opening of the connection hole.If the continuous block located at the end is the last one, the other end of the connection shaft The screw shaft at the end is protruded from the outer end of the connection hole, a nut is screwed into the screw shaft and tightened to fasten the screw shaft to the periphery of the outer end of the connection hole. The filling hole and the connection hole are provided in the block so as to communicate with the open end of the filling hole or the filling hole. Waterproofing connection method of the concrete blocks, characterized in that filling the grout from the injection holes. 8. The method for connecting a concrete block to water according to claim 6 or 7, wherein one end of a connection nut is screwed into a screw shaft portion inserted through an insertion hole of the plate and tightened to connect the plate. Instead of a configuration in which the plate is brought into contact with the peripheral edge of the opening end of the hole, a tightening nut is screwed into the screw shaft and tightened to bring the plate into contact with the peripheral portion of the opening end of the connection hole. A watertight connection method for a concrete block, wherein a connection nut is screwed into a screw shaft protruding from the nut. 9. The method according to claim 6, wherein the concave groove is extended in a width direction of the connecting surface at a portion where an end of the connecting hole is present, and A method for connecting a concrete block to water, wherein a screw shaft portion is provided in the extension portion. 10. The method of connecting a concrete block according to claim 6, 7, or 8, wherein the elastic soft waterproof material surrounding the concave groove is compressed by using the block according to claim 5. A method of connecting concrete blocks with water, wherein the connecting surfaces of the blocks are butted against each other. 11. The method for connecting a concrete block to water according to claim 6, 7 or 8, wherein the plate is brought into close contact with the entire periphery of the opening end of the connection hole to close the insertion hole. Water-blocking method for concrete blocks.