JPH0799031B2 - Concrete block joining method, concrete block used in the method, and mold device for forming joining recess of the concrete block - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for joining concrete blocks, a concrete block used in the method, and a mold device for forming a joint recess of the concrete block.

[0002]

2. Description of the Related Art As an example of a conventional method for joining concrete blocks to each other, as shown in FIGS. 12 to 13, insertion holes b, b opened on a joining surface a and extending in the block width direction.
The blocks A and A, which are provided with
b are brought into contact with each other so as to communicate with each other, and both end portions of the tension rod member c loosely inserted in the communicating insertion hole are projected into the joint recesses d, d provided in the block surface, and the tension rod member c is attached. In the tensioned state, the end portion is fixed to the inner surface of the joint recess d.

When the tension rod c is the bolt shaft c1, the fixing procedure is as shown in FIG. 12, in which a washer f is fitted to an end portion (screw portion) e protruding into the joint recess d and The end portion is fixed to the inner surface of the joint recess by screwing and tightening the nut g onto the screw portion e.
Further, when the tension rod c is the twisted wire c2, as shown in FIG. 13, a washer i is attached to the end portion h protruding into the joint recess d.
After fitting, the joint rod c is tensioned, and the receiving member j
The end portion is fixed to the inner surface of the joint recess by using a wedge member k that is tightly accommodated in.

After being fixed in this way, it is usually shown in FIGS.
As shown in FIG. 3, the joining work was completed by filling the joining recess d with the mortar m, but prior to the filling of the mortar, a liquid filler (a resin liquid exhibiting a water-stopping function by curing) was filled in the gap of the insertion hole. And grout) were also used.
As shown in FIG. 13, the procedure is to insert an injection pipe o into a through hole n of a washer provided in communication with the insertion hole b, and inject the liquid filler into the insertion hole through the injection pipe at a required pressure. Met.

[0005]

According to the conventional connecting method, when the gap of the insertion hole is left as it is, the tension rod and the block do not have a unity structure, so that the tension rod is a shear reinforcement member. There was a problem that it did not work effectively. If the mortar is not sufficiently filled in the joint recess, or if the filled mortar contracts after installation and the mortar does not adhere well to the inner surface of the joint recess, the water that has entered from the joint recess will also enter the insertion hole and leak water. There was a problem that caused corrosion of the tension bar.

In order to solve such a problem, it has been attempted to fill the gap between the insertion holes with the liquid filler as described above, but in this case as well, for the following reason.
It is difficult to densely fill the insertion hole with the liquid filler. Therefore, the above-mentioned problems in the case where the insertion hole is not filled have not been solved. That is, since the inner surface (concrete surface) of the joining recess that abuts the washer is not formed as a completely smooth surface, a gap is created at the abutting portion p of both, and the liquid filler injected into the insertion hole is When a phenomenon of backflow from the gap (a backflow phenomenon shown by reference numeral q in FIG. 13) has occurred, and particularly when the tension rod member is formed by using a twisted wire, the liquid filler also flows from the gap between the strands. This is because it is difficult to densely fill the liquid filler due to the phenomenon of backflow (a backflow phenomenon indicated by symbol r in FIG. 13), and voids are formed inside the insertion holes.

In order to eliminate such incompleteness of filling, it is not unthinkable to diversify the technique in the field of bridges, which is adopted for substantially the same purpose of filling the insertion hole with the liquid filler. FIG. 14 is a diagram for explaining a construction procedure when it is assumed that this is diverted, and a filling cap u formed by surrounding a fixed brim t on the other end edge of the cylindrical body s whose one end is closed is shown. Using the ring-shaped elastic water blocking material v, the fixed brim t is brought into contact with the opening peripheral edge portion of the joint recess d and is closely fixed to the block surface using the anchor bolt w, and is provided on the cylindrical body t. A liquid filler is filled inside through the injection hole x. In this case, the liquid filler does not leak, so that the liquid filler can be densely filled in the insertion hole b.

However, the cap is still shown in FIG.
As shown in FIG. 5, the protrusion remains as it is (in the example of FIG. 1, all the mounting portions of the lid member 39 protrude), so that it does not protrude in parallel with the visible surface of the block. It is not desirable in appearance, especially when the cap is protruding to the inner surface of the tank when joining blocks that construct a tank such as a septic tank, there is a risk that something will get caught in the protruding portion or the effective volume of the tank will be reduced by the protruding portion. There was also a problem in terms of functionality. In addition, since the cap is expensive in terms of cost, there is a problem that installation cost increases if one cap is attached to each joint recess.

In view of the above conventional problems, the present invention was developed with the aim of achieving reliable, easy construction and reducing construction costs, and a concrete block capable of solving the above problems at once. The purpose is to provide the joining method of. Another object of the present invention is to provide a concrete block used in the method, and further to provide a mold device for forming a joint recess of the concrete block.

[0010]

To solve the above problems, the present invention employs the following means. That is, the method for joining concrete blocks according to the present invention (hereinafter referred to as the joining method) is a method in which the joining surfaces of the concrete blocks 1 and 1 each having the through hole 21 that opens in the joining surface 10 and extends in the block width direction After abutting the 21, 21 so as to communicate with each other, both end portions of the tension rod member 23 loosely inserted in the communicating through hole are projected into the joint recesses 25, 25 recessed in the block surface, and The tension rod member 23 is tensioned to fix its end portion to the inner surface of the joint recess, and this fixing is performed by communicating the insertion hole 21 and the joint recess 25, and then the inner peripheral portion on the opening side of the joint recess, A disc-shaped lid member 39 having a through hole 42 penetrating in the depth direction of the joint recess 25 is screwed in, and in the screwed state, the lid member surface is substantially flush with the block surface. After that, it was provided on one lid member Holes, or liquid filler is injected from the injection port communicating with the required site of the insertion hole, it is characterized in that to fill the liquid filler bonding recesses and through holes.

Further, the concrete block used for the joining method (hereinafter referred to as a block) is provided with an insertion hole 21 which is open in the joint surface 10 and extends in the block width direction, and the insertion hole 21 is a recess formed on the surface of the block. A circular hole 29 is continuously provided at the opening end of a main body 26 of the joint recess which is enlarged toward the front side, and the female hole 30 is formed on the concrete peripheral surface of the circular hole 29. Is directly recessed, and the circular hole portion 29 has a male screw portion 40 to be screwed with the female screw portion 30 on its peripheral surface, and a through hole 42 penetrates in the depth direction of the joining recessed portion 25. The joining recess 25 is closed by screwing the provided disc-shaped lid member 39, and the lid member surface is substantially flush with the block surface in the screwed state. With That.

A mold device (hereinafter referred to as a mold device) 43 for forming a joint concave portion of the concrete block has a first mold 45 which is tapered toward the front side, and a frustoconical peripheral part 51 on the tip side thereof. The mold 45 of No. 1 projects outwardly from the base end peripheral edge 52 (including the case where the front end side peripheral edge 51 a partially matches the base end peripheral edge 52), and a projection screw 53 is provided on the peripheral surface thereof. And a second mold 46
Is characterized in that it is separably fixed by the fixing means in a state where the axes of both are aligned and the base end face of the first die and the tip end face of the second die are in contact with each other. In the mold device, the first mold 45 is preferably made of a rubber material.

[0013]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows an embodiment of a concrete block (hereinafter referred to as a block) 1 used in the present invention, which is formed as a standing wall block for constructing a septic tank. The block 1 is provided with a pedestal portion 6 having a toe portion 3 and a heel portion 5 at the lower end of a vertical wall portion 2 which is long in the vertical direction, and an inner surface of the vertical wall portion 2 receives a receiving end of a horizontal plate 7. The part 9 is provided so as to project. Joint surfaces 10 at both ends of the block,
As shown in FIGS. 2 to 3, a filling hole 11 extending upward and extending linearly downward and reaching the vicinity of the lower end of the pedestal portion 6 is formed in the state in which the joining surfaces 10 and 10 are in contact with each other. (FIG. 2), for example, the semicircular concave grooves 12, 12 are
It is provided continuously in the vertical direction. Further, a trapezoidal fitting groove 15 for fitting an elastic and soft waterproof material 13 made of, for example, butyl rubber, is provided in the joint surface 10 so as to surround the concave groove 12 in a U shape except the upper end thereof. When the joining surfaces come into contact with each other, the accommodating portion 16 (FIG. 6) for accommodating the elastic and soft water blocking material 13 in a compressed state is formed by the matching fitting grooves 15, 15. Note that, in FIG. 3, for convenience of explanation, the elastic and soft water blocking material 13 is shown in a dense state with dots.

As shown in FIGS. 1 and 3, in the groove 12 at one end of the block, one end is opened at the surface of the toe portion 3 and the other end is opened at the groove 12 at the lower end side thereof.
The injection holes 19 are connected in series.

As shown in FIG. 2, an insertion hole 21 that opens in the groove 12 and extends linearly in the width direction of the standing wall is provided at a required portion of the groove 12 in the vertical direction. When they abut each other, the insertion holes 21 and 21 communicate with each other linearly (FIG. 6). In this embodiment, as shown in FIG. 5, the insertion hole 21 is formed to have a length such that the entire tension rod member 23 formed as a bolt shaft having male screw portions 22 and 22 at both end portions can be loosely inserted. In addition, in the substantially central portion of the insertion hole 21, there is formed a joint recess 25 having, for example, a truncated pyramid shape that is expanded toward the opening end side by recessing the surface portion on the inner surface side of the block. As shown in FIGS. 2 and 5, the joint recess 25 has a circular hole portion (tapered hole portion in this embodiment) 29 through a step 27 at the opening end of the joint recess main body 26 that expands toward the front side. A female screw portion 30 is directly recessed on the concrete peripheral surface having a taper of the tapered hole portion.

Then, the male rod portion 22 is formed by loosely inserting the tension rod member 23 into the insertion hole 21 and projecting it into the joint recess 25.
Then, a washer 35 is fitted into which the inclined wall surface 31 and the back surface 32 of the joint recess 25 are in contact with each other, and the front surface 33 forms an abutment surface that is perpendicular to the axis of the insertion hole. The blocks can be joined together by (Fig. 6). A hole 37 communicating with the insertion hole 21 is formed in the washer 35.

The joint recess 25 can be closed by a lid member 39 as shown in FIG. The lid member 39
As shown in FIG. 2, it has a disk shape, and the tapered hole 29
A male screw portion 40 that is screwed into the female screw 30 provided on the outer peripheral surface 38 having a taper corresponding to the taper angle of the taper hole portion.
And has a through hole 42 that is offset toward the peripheral edge, extends in the depth direction of the joint recess, and is closed by the plug 41 (FIG. 1). Then, in the closed state, as shown in FIGS. 6 to 7, the outer surface of the lid member is flush with the outer surface of the standing wall portion and the through hole 4 is formed.
2 is in the upper position.

4 and 8 show a mold device 43 for forming the joint recess 25. The mold device 43 is a first mold 45 which is detachable by using, for example, screw fixing means.
And a second mold 46. The first mold 45 has a polygonal truncated pyramid shape, and a side surface portion thereof is provided with a through hole 49 through which the core rod member 47 forming the insertion hole 21 passes.
The whole is made of rubber material. Also the second mold 4
6 is formed of, for example, vinyl chloride resin,
It is formed in a flat disk shape having a tapered peripheral surface 50, and a peripheral edge portion 51 on the front end surface side thereof projects outward more than a peripheral edge 52 of the base end surface of the first die 45. Further, a spiral projection screw 53 is provided on the tapered peripheral surface 50.

As shown in FIG. 8, the first die 45 and the second die 46 having such a configuration are brought into contact with each other with their axes aligned, and the die plate 55 is inserted into the second die 46. The fixing screw 57 that is inserted through the provided screw insertion hole 56 is attached to the first mold 4
As shown in FIG. 8, the first die 45 and the second die 4 are screwed into the insert 59 that is open at the tip surface of the die 5.
6 is in an integrated state and is positioned and fixed to the template 55 as required.

In order to form the joint recess 25 of the block using the mold device 43, the mold device 43 is used to form the mold plate 55.
After the concrete is set in the required area of (1) and the concrete is set and the concrete is hardened, the fixing screws 57 are removed to separate the template 55 as shown in FIG. After that, the second mold 46 is reversely rotated to remove the mold (FIG. 9), after which the core member 47 is extracted and the first mold 45 is removed (FIG. 10). In this embodiment, since the first die 45 is made of a deformable rubber material, it is easy to remove the die.

However, the block 1 having such a configuration
The procedure for joining one to the other is as follows. That is, as shown in FIG. 5, the elastic soft water blocking material 13 is attached in advance to the bottom portion of the fitting groove 15 formed on one of the joint surfaces, for example, the left joint surface 10, and either one of them is attached. The tension rod 23 is completely inserted into the insertion hole of the block, for example, the insertion hole 21 of the right block.

After that, as shown in FIG. 6, the joining surfaces 10 and 10 are brought into contact with each other so that the recessed grooves 12 and 12 on both joining surfaces are aligned with each other, and then the tension bar member 23 is projected from the joining surface 10 to communicate with each other. This is inserted into the other insertion hole 21 in the state, and the male screw portions 22 and 22 are projected into the joint recesses 25 and 25.

After that, as shown in FIG. 6, when the washer 35 is fitted to the male screw portion 22 and the nut 36 is tightened, the blocks 1 and 1 are connected to each other via the tension rod member 23, and the elastic and soft water blocking member 13 is connected. Is accommodated in a compressed state in the accommodating portion 16 formed by the matching of the two fitting grooves 15, 15.

After that, the joint recess 25 is closed by screwing the lid member 39, and a liquid filler (for example, resin liquid or grout) is filled from the injection hole 19. At the time of this filling, the filling hole 11 is surrounded by the elastic soft water stop member 13 in the compressed state so as to be opened at the upper end of the block, so that the injected liquid filler is prevented from leaking to the outside. While filling the filling hole 11, a part thereof is inserted through the insertion hole 21.
Into the joint recess 25 through the hole 37 provided in the washer 35.
Spills in. At that time, the internal air is discharged from the through hole 42, and the liquid filler flows out from the through hole 42.
It can be confirmed that the inside of the joint recess 25 is filled with the liquid filler (see FIG. 7). In this state, the through hole 42 is closed with the plug 41 (FIG. 1). The liquid filler thus fills the filling hole 11 and flows out from the upper end open portion (exhaust port) 59, so that the filling hole 11, each insertion hole 21 ..., Each joint recess 25 ... It can be confirmed that it has been filled with the agent. The liquid filler may be injected into the insertion hole 21 through a through hole provided in one lid member. In this case,
The fact that the liquid filler has flowed out of the through hole of the other lid member can confirm that the liquid filler has been filled in the insertion hole.

FIG. 11 shows another embodiment of the block 1. The block 1 is opened in the joint surface 10 and extends in the width direction of the block, and the joint concave portion at the end of the block (pyramidal truncated cone or truncated cone). Insertion hole 2 opened to 25)
1 is provided, and a screw ring 62 having screw grooves 60 and 61 provided on the inner and outer peripheral surfaces is embedded in the peripheral edge portion of the opening of the joint recess 25. And the lid member 3 having the same structure as the above
9 can be screwed into the inner thread groove 60 of the thread ring.

In order to join the blocks having the above construction, the blocks 1 and 1 are brought into contact with the joining surfaces 10 and 10 so that the through holes 21 and 21 are communicated with each other, and the through holes 21 and 21 are communicated with each other. The end portion 6 of the tension rod 23 (formed as a twisted wire in this embodiment) 23 loosely inserted in the
3, 63 are projected into the joint recesses 25, 25, the tension bar 23 is tensioned, and then both ends of the tension bar 23 are fixed with a fixture (including a washer 65, a wedge member 66, and a receiving cylinder member 67). It is fixed to the inner surface of the joint recess by using the insertion hole 2 in the fixed state by the hole 69 provided in the washer 65.
1 and the joining recess 25 are formed so as to communicate with each other, then the lid member 39 is screwed into the inner thread groove 60, and then the liquid filler is injected through the through hole 42 provided in one lid member, and the other lid member. The injection of the liquid filler is completed when the liquid filler flows out from the through hole 42 of 39.

[0027]

Since the present invention is constituted as described above, it has the following excellent effects. In the joining method according to the present invention, after fixing the end portion of the tension rod member to the inner surface of the joining recess, the joining recess is closed by screwing the lid member into the inner peripheral portion on the opening side of the joining recess provided in the block. Then, in the closed state, the surface of the lid member and the surface of the block are substantially flush with each other, and a liquid filler is injected from a through hole provided in one of the lid members or an injection port communicating with a required portion of the insertion hole, The joining recess and the insertion hole are filled with a liquid filler.

Therefore, the filling of the liquid filler into the joint recess and the insertion hole can be efficiently performed in one step. Moreover, it becomes possible to densely fill the liquid filler, and it is possible to effectively function the tension rod material as a shearing reinforcement material, and it is possible to eliminate the conventional problems of causing water leakage and causing corrosion of the tension rod material. it can.

In addition to this, it has a unique effect that cannot be achieved at all by diverting the technology in the bridge field. That is, in the closed state, the surface of the lid member and the surface of the block are substantially flush with each other, so that the cap protrudes from the visible surface of the block or the cap protrudes from the inner surface of the constructed septic tank. It is possible to avoid inconvenience in terms of physical and functional aspects. In addition, since the disc-shaped lid member can be manufactured at a lower cost than the cylindrical cap, the construction cost can be reduced.

In the block according to the present invention, the female screw portion is directly recessed on the concrete peripheral surface on the opening side of the joint recess, and the male screw portion of the lid member is screwed into the female screw portion to form the joint recess. The lid member is used to close the lid. for that reason,
As compared with the case where the screw ring is embedded in the joint recess as shown in FIG. 14, the costly screw ring and the step of burying the screw ring are not necessary, so that the manufacturing cost of the block can be reduced accordingly.

Since the mold device according to the present invention adopts a configuration in which the first mold and the second mold are separably fixed by the fixing means, the fixed state of both molds is released and the rear second mold is released. By reversely rotating and releasing from the mold, the female screw portion can be naturally formed on the inner peripheral portion on the opening side of the joining recess. Since the second mold is sufficient for demolding by reverse rotation, the demolding work can be performed easily and comfortably as compared with the case of demolding by rotating the first and second molds in reverse. You can In particular, when the first mold is made of a rubber material, the first mold can be easily demolded by its natural deformation.

[Brief description of drawings]

FIG. 1 is a perspective view showing a block according to the present invention in a joined state.

FIG. 2 is a perspective view illustrating an end portion of a block on a joining side.

FIG. 3 is an explanatory diagram illustrating a configuration of a side surface portion of a block in a state where an elastic soft water blocking material is attached.

FIG. 4 is a perspective view illustrating a mold device.

FIG. 5 is a cross-sectional view illustrating a procedure for joining blocks to each other.

FIG. 6 is a cross-sectional view illustrating a joined state of blocks.

FIG. 7 is a cross-sectional view illustrating a state where a joining recess is filled with a liquid filler.

FIG. 8 is a cross-sectional view illustrating a state in which the mold device is fixed to the mold plate.

FIG. 9 is a cross-sectional view for explaining a state in which the mold plate has been removed, together with the procedure for removing the mold by rotating the first mold in the reverse direction.

FIG. 10 is a cross-sectional view illustrating a procedure for removing the second mold.

FIG. 11 is a sectional view for explaining another way of joining blocks together.

FIG. 12 is a cross-sectional view for explaining a conventional procedure of block joining together with its problems.

FIG. 13 is a cross-sectional view for explaining a conventional procedure of block joining together with its problems.

FIG. 14 is an explanatory diagram for explaining a procedure for connecting blocks to each other by diverting the technology in the field of bridges.

FIG. 15 is an explanatory diagram illustrating a problem when blocks are connected to each other by diverting a technology in the field of bridges.

[Explanation of symbols]

 1 block 10 joining surface 21 insertion hole 23 tension rod 25 joining recess 26 joining recess main body 29 circular hole 30 female screw portion 39 lid member 40 male screw portion 42 through hole 43 mold device 45 first mold 46 second mold

Continuation of front page (51) Int.Cl. ⁶ Identification number Office reference number FI technical display area E04B 1/61 1/682

Claims (4)

[Claims] 1. A concrete block 1, 1 having an insertion hole 21 which is opened in a joint surface 10 and extends in the width direction of the block.
After the contact surfaces are contacted with each other so that the insertion holes 21 and 21 communicate with each other, both end portions of the tension rod member 23 loosely inserted into the communication insertion holes are joined to each other by joining recesses 25, 25, and the tension bar member 23 is tensioned to fix its end portion to the inner surface of the joint recess, and this fixing is performed by connecting the insertion hole 21 and the joint recess 25, and then the joint recess. A disc-shaped lid member 39 having a through hole 42 penetrating in the depth direction of the joint recess 25 is screwed into the inner peripheral portion on the opening side, and in the screwed state, the lid member surface is substantially flush with the block surface. After that, the liquid filler is injected from a through hole provided in one lid member or an injection port communicating with a required part of the insertion hole, and the joining recess and the insertion hole are filled with the liquid filler. A method of joining concrete blocks, characterized by: 2. An insertion hole 21 which is open in the joint surface 10 and extends in the block width direction is provided.
Is communicated with a joint recess 25 formed in the surface of the block, and the joint recess 25 has a joint recess main body 26 that expands toward the surface side.
A circular hole portion 29 is continuously provided at the opening end of the circular hole portion 29, and a female screw portion 30 is directly recessed on the concrete peripheral surface of the circular hole portion 29. A disc-shaped lid member 39 having a male screw portion 40 that is screwed into the peripheral surface and having a through hole 42 formed in the depth direction of the joint recess 25 is screwed into the joint recess 25 to close the joint recess 25. The concrete block, wherein the surface of the lid member is substantially flush with the surface of the block in the screwed state. 3. A first die 45 which becomes thinner toward the front side, and a peripheral edge portion 51 which is frustoconical and has a tip end side thereof projects more outward than a base end peripheral edge 52 of the first die 45, and its peripheral surface. Has a second mold 46 provided with a protrusion screw 53.
The concrete blocks 5 and 46 are separably fixed by a fixing means in a state where the axes of both are aligned and the base end face of the first die and the tip end face of the second die are in contact with each other. Device for forming a joint recess of the. 4. The mold apparatus according to claim 3, wherein the first mold 45 is made of a rubber material.