JP2000008504A - Water cutoff construction method for concrete connection object and water cutoff connecting member - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a water cutoff construction method for concrete connection objects and a water cutoff connecting member, which connects connection objects such as civil engineering materials or building materials together simply and reliably via the accurate fitting positioning of a connecting member main body of an elastic material, is excellent in a rigid connecting property, a following-up property to external force such as an earthquake, and a water cutoff property, is easy to manufacture and design, and can reduce the manufacturing cost. SOLUTION: Arrow-shaped lock sections 6a locked in fitting holes 3 provided at the depths from opening sections 4 facing the connecting faces 2 of concrete connection objects A, B are provided at least at one side end of a connecting member main body 6 made of an elastic material. Cleavage space sections 9 are formed in the thickness direction nearly crossing the longitudinal direction I in the connecting member main body 6.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for waterproofing a concrete joint and a joint member for waterproofing, for example, an underground buried structure such as a concrete box culvert, a side ditch, a U-shaped ditch, a sewer pipe, and a common ditch. Concrete materials in construction materials such as civil engineering materials and exterior wall panels, interior wall panels, ceiling panels, floor panels, slab boards, etc. as ground structures such as objects, tunnels, retaining walls, etc., are easily and reliably connected,
Improve earthquake resistance and waterproofness.

[0002]

2. Description of the Related Art Conventionally, there are the following joining methods for connecting concrete materials, such as box culverts, gutters, U-shaped grooves, and other civil engineering materials at a laying site.
That the concrete joints are structurally rigid to integrate each other; (b) that the joints of the concrete joints have flexibility in order to exhibit earthquake resistance;
(C) In order to prevent leakage of the liquid, it is necessary to satisfy conditions such as exhibiting a water stopping property. Recently, to maintain the seismic resistance of underground buried structures such as box culverts and gutters in response to the ground strain caused by ground deformation such as lateral flow due to a large earthquake, the rigidity of underground buried structures has been reduced. Let
It has been found that a method that absorbs ground deformation as a flexible structure is the best solution. In this case, it is necessary to ensure sufficient water stoppage even if the connecting portion between the underground buried structures greatly changes. However, these (a) to
There has been no bonding method that satisfies all of the items (c).
Conventionally, there is an example of a joining method as shown in FIG. 10 for joining underground buried structures. This is achieved by interposing a packing 51 or an O-ring made of rubber or synthetic resin in a receiving port 50a at a front end of a receiving pipe 50 as one concrete joining article A to be joined, and forming the other concrete joining article A. This is a method of inserting the insertion tube 52. As another joining method, as shown in FIG. 11, a mounting portion 53 provided outside the concrete joints A and B is tightened by bolts 54 and nuts 55, and the joint surfaces 2 of the concrete joints A and B are joined together. , 2 and a packing 56 made of rubber or the like is crimped to stop water.

[0003]

As shown in FIG. 10, a packing 5 made of rubber or the like is provided in a receiving port 50a of a receiving pipe 50.
The conventional method of joining the concrete joints A and B as an underground buried structure by inserting the insertion pipe 52 through the first pipe 1 secures a clearance in the mouth 50a of the mouth pipe 50, The packing 51 has a frictional resistance such that the packing 51 does not come out of the receiving port 50a in a natural joint state,
In addition, the design must be performed in such a manner that the limit pressure for pushing by the insertion tube 52 must be set to the maximum. In addition, this joining method is inferior in the ability to follow the joint between the inlet pipe 50 and the insertion pipe 52 with respect to an external force such as a tensile force or a compressive force such as ground deformation, ground strain, vibration, etc. Sufficient water stopping properties could not be obtained, such as water leaking from a gap between the receiving tube 50 and the insertion tube 52. As shown in FIG. 11, another conventional joining method for pressing a packing 56 made of rubber or the like between the joining surfaces 2 and 2 of concrete joints A and B by tightening bolts 54 and nuts 55 is concrete. Joint A made of
Since the flexibility performance between B is significantly impaired, the earthquake resistance is poor. In addition, the waterproofness is not sufficient because it is performed only by a pressing force enough to cause elastic deformation of the packing 56. In addition, this joining method shown in FIG. 11 has a large number of parts, requires skilled techniques for joining concrete joints A and B, requires a lot of time and labor for joining work, and has poor workability and non-workability. Efficiency, construction costs,
There were inconveniences such as high material and production costs.

SUMMARY OF THE INVENTION The present invention solves the above-mentioned conventional inconvenience, and grout material is injected into a mounting hole provided at the back of a joint surface of a concrete joint, and is provided at the side end of the joining member body in the mounting hole. By inserting the locking part into the predetermined position while visually checking it, and solidifying the grout material, the joining work between concrete joints can be performed reliably even inexperienced people in a short time with simple handling operation In addition, the rigidity of the joints is sufficient, and it has good follow-up to external forces such as earthquakes and vibrations, has excellent water-stopping properties, and has a small number of parts, and is easy to manufacture and design. Another object of the present invention is to provide a method of stopping water for a concrete joint and a joining member for stopping water at a low material cost.

[0005]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and a first aspect of the present invention is to inject a grout material into a mounting hole provided at the back of a joint surface of a concrete joint, A filling step, a step of inserting a locking portion formed at a side end in a longitudinal direction of the joining member main body formed of an elastic material into the mounting hole, and solidifying the grout material to form the mounting hole. In addition, means for locking together with the locking portion and joining the concrete joints to each other via the joining member body is adopted.

According to a second aspect of the present invention, there is provided a method according to the first aspect, wherein the grout material is press-fitted from an opening facing the joint surface of the concrete joint into a mounting hole provided at the back of the opening. Adopted.

According to a third aspect of the present invention, in the first aspect, the joining member body has an arrow-shaped locking portion formed at a side end in a longitudinal direction so as to be locked in the mounting hole, and the locking portion. A closed pressure contact portion provided in the thickness direction intersecting the longitudinal direction at the back of the closed pressure contact portion which is pressed against the opening facing the joint surface of the concrete joint, and is provided in the thickness direction behind the closed pressure contact portion at the time of insertion into the mounting hole. The outer portion is formed as a closed end, and is formed from a joining portion which can be separated and extended when a predetermined external force is applied, or an opening space portion having a contact portion through a gap.

According to a fourth aspect of the present invention, at least one side end of a joining member main body formed of an elastic material is connected to an inside of a mounting hole provided at a depth from an opening facing a joining surface of a concrete joint. An arrow-shaped locking portion to be stopped is provided, and the joining member main body is formed with a space portion for opening in the thickness direction substantially intersecting with the axial length direction.

According to a fifth aspect of the present invention, in the fourth aspect, the opening is formed so that an inner shape thereof is tapered toward a large-diameter mounting hole provided at the back of the joint surface of the concrete joint. In addition, a constricted portion is formed in the neck portion located at the boundary between the mounting hole and the opening, and the installation width between the locking portions of the joining member main body is formed smaller than the opening width of the constricted portion. Adopted.

According to a sixth aspect of the present invention, in the fourth aspect, the joining member main body is provided with a means for providing a closing pressure contact portion which is pressed against the opening behind the locking portion on at least one of the upper surface and the lower surface. Adopted.

According to a seventh aspect of the present invention, in the fourth aspect, the opening space portion is configured such that an outer portion in a thickness direction of the joining member main body is a detachable closed end having a joining portion of a desired length, and Means in which the inner part of the space for use is formed as a wide part is adopted.

According to an eighth aspect of the present invention, in the fourth aspect, the opening space portion is configured such that an outer portion in the thickness direction of the joining member main body is formed as a contact portion with a gap of a desired length therebetween, and the opening space portion is provided. The means that the inner part is formed in a wide part is adopted.

According to a ninth aspect of the present invention, in any one of the fourth, seventh, and eighth aspects, a plurality of the opening spaces are provided in mutually opposite directions. It was adopted.

According to a tenth aspect of the present invention, in any one of the fourth, seventh, eighth, and ninth aspects, the opening space portion extends beyond the center line of the thickness of the joining member. The means of being formed was adopted.

According to an eleventh aspect of the present invention, in any one of the seventh and eighth aspects, the joint portion or the contact portion disposed outside the opening space portion has a length of about 1 mm or less. The means of being formed was adopted.

According to a twelfth aspect of the present invention, in the sixth aspect, the closing press contact portion is obliquely provided so as to be lockable in a direction in which the locking portion is inserted into the mounting hole, and is longer than the locking portion. Means in which a desired number of lips are formed in a lip shape are employed.

[0017]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 6, A and B
Is a concrete joint to be joined, and the concrete joints A and B used in this embodiment are box culverts 1 and 1 as shown in FIG. These box culverts 1 and 1 are provided with opposing joint surfaces 2 and 2 which can be joined at the time of joining.

In the drawings, reference numeral 3 denotes a mounting hole. The mounting hole 3 has a substantially circular cross section as shown in FIGS. 1 to 5, for example, and has a joint surface between both concrete joints A and B to be joined. The joint surface 2 faces at least one of the concrete joints 2 and 2 so that the arrow-shaped engaging portion 6a formed at at least one end of the joint member body 6 can be inserted into the joint surface 2 of at least one concrete joint. It is provided with a large diameter in the back through an opening 4 provided in a substantially annular front surface.

The opening 4 is formed so that its cross-sectional shape is tapered toward the large-diameter mounting hole 3 provided at the back, and a neck located at the boundary between the mounting hole 3 and the opening 4. Constricted portions 5 and 5 are formed in the portion. l ₁ is the minimum opening width of the opening 4 in the vertical direction.

Reference numeral 6 denotes a joining member main body formed of an elastic material made of rubber or synthetic resin and having a substantially annular front surface. The joining member main body 6 faces the joining surface 2 of the concrete joint A on at least one side end. An arrow-shaped locking portion 6a is provided which is inserted from the opening portion 4 into the mounting hole 3 provided at the back thereof and locked, and the other end of the joining member main body 6 is a concrete joint B on the other side.
Attached to In the present embodiment, arrow-shaped locking portions 6a, 6a are provided at both left and right ends of the joining member main body 6, respectively. As the elastic material to form the joining member main body 6, for example, a material obtained by knitting inorganic fibers such as glass fiber and carbon fiber in addition to rubber and synthetic resin is used. The size of the joining member main body 6 of the present embodiment is such that the size of the one locking portion 6a is different from that of the other locking portion 6a.
Is about 75 mm, and the thickness H of the joining member body 6 is about 17 mm. Further, the effective installation length in the longitudinal direction I of the joining member body 6 of the opening space 9 described later, in which a plurality of, three in the drawing, are formed in the joining member body 6, is about 18 mm. Furthermore the locking portion 6a is missing when inserted into the mounting hole 3 is prevented by being formed on the arrow-shaped, and the length l ₂ of the longitudinal direction I is formed approximately 6.6 mm. Moreover, the height h in the thickness direction of the locking portion 6a is formed to be at least 2 mm or more. Reference numeral 6b denotes a closing press contact portion provided behind the locking portion 6a. The closing press contact portion 6b can be locked in the insertion direction S of the locking portion 6a with respect to the mounting hole 3 at a desired installation angle θ. A desired number of sloping and lip-shaped members, three in the upper and lower portions in the drawing, are formed on the left and right behind the two locking portions 6a, 6a. The installation angle θ of the lip-shaped closing press contact portion 6b is in a range of 45 ° to 60 ° in order to facilitate the insertion of the locking portion 6a into the mounting hole 3 through the opening 4 and to press the inner surface of the opening 4 with pressure. By doing so, it is optimized to prevent the closing pressure contact portion 6b from coming out of the opening 4. The number of the closed press-contact portions 6b is not limited to the number shown in the figure, and can be freely increased or decreased.
Although not shown in the drawing in the width direction of the closing press contact portions 6b, 6b at least closest to the engaging portions 6a, 6a, the closing press contact portions 6b, 6b, The grout material 7 filled in the mounting holes 3 and 3 when the locking portion 6 is inserted into the mounting holes 3 and 3 except 6b.
The desired number of slits through which the excess amount is smoothly circulated is provided.

K is a space formed between the joint member main body 6 and the engaging portion 6a inserted into the mounting hole 3.
In order to join the joints A and B made of concrete, the grout material 7 is first injected into the mounting hole 3 as shown in FIG. 2 and filled as shown in FIG. Side ends in the longitudinal direction I of the joining member body 6
In the present embodiment, the locking portions 6a formed at one end of the locking portions 6a formed at the left and right ends are inserted into the mounting holes 3. When the grout material 7 already injected into the mounting hole 3 is solidified in the mounting hole 3, the locking portion 6a
The concrete joints A and B are joined to each other via the joint member main body 6 which is attached by locking the grout material 7 solidified in the space K with the attachment hole 3 integrally with the joint hole 3.

To inject the grout material 7 into the mounting hole 3, an injector 8 as shown in FIG. 2 is used. The grout material 7 accommodated in the cylinder 8b is moved by the trigger 8a as shown in FIG.
A pistol type is used which is discharged from a nozzle 8d provided at the tip of the cylinder 8b by the pressing force of a piston 8c which can slide inside. In order to inject the grout material 7 into the mounting hole 3 by using the injector 8, the trigger 8 a of the injector 8 is pulled to open the opening 7 facing the joint surface 2 of the concrete joint A. The grout material 7 is press-fitted into the mounting hole 3 provided at the back of the opening 4 from the opening 4.

Reference numeral 9 denotes a plurality of members extending in the thickness direction T substantially intersecting with the longitudinal direction I of the joining member main body 6;
Pieces are open column space portion is formed, the open column space section 9 the outer portion of the thickness direction T of the joint member main body 6, separable closed end having a junction 9a ₁ of the desired length l ₃ 9a, and the inner portion is formed as a wide portion 9b. The opening space portions 9 adjacent to each other in the axial length direction I are installed in directions opposite to each other, but these opening space portions 9 cross over the center line N in the thickness direction T of the joining member main body 6. It is formed. The joint 9a ₁ is approximately 1mm or less in length in the separable joined to it are the concrete conjugates A, B
It is optimal because the joining member main body 6 exhibits rigidity when joining, so that the locking portions 6a, 6a can be easily inserted into predetermined positions in the mounting holes 3, 3. The ground deformation earthquake, a predetermined size or more tensile force of ground strain or vibration, if an external force such as a compressive force is applied, the disconnection space portion by the joint portions 9a ₁ is broken in the lateral direction When the opening 9 is opened, the joining member main body 6 has a bellows shape as a whole and exhibits elasticity in the vertical and horizontal directions as shown in FIG. 5, so that the following ability of the joining member main body 6 to an external force such as an earthquake is improved. The waterproofness of the joining member body 6 to the concrete joints A and B is excellent. The wide portion 9b of the opening space 9 is formed in an arc shape as shown in the figure, and the diameter Φ is formed to a size of about 4 mm.

As the grout material 7, for example, non-shrinkable cement mortar is preferably used, but in addition, liquid rubber or synthetic resin is used. The grout material 7 is made of concrete joints A and B as described above.
Is filled and solidified in the mounting hole 3 through the opening 4 facing the joint surface 2 of the second member.

X is the joining direction of the concrete joining members A and B, Y is the direction crossing the joining direction X in the vertical direction,
Z is a direction crossing the joining direction X in the horizontal direction.

One embodiment of the present invention has the above configuration.
Hereinafter, an example of a method of joining the concrete joints A and B to each other will be described in the order of steps together with the operation. In order to join the box culverts 1 and 1 as the concrete joints A and B at the laying site, first, the box culverts 1 and 1 are inserted into the mounting holes 3 and 3 provided at the back of the joint surfaces 2 and 2 of the concrete joints A and B. The grout material 7 is injected and filled. This grout material 7
In addition to the use of non-shrink cement mortar,
Liquid rubber or synthetic resin is used. Grout material 7
Is injected using a pistol-type injector 8 as shown in FIG. 2, for example.
The grout members 7, 7 are press-fitted into the mounting holes 3, 3 provided at the back of the openings 4, 4 from the openings 4, 4 facing the second.

Next, arrow-shaped locking portions 6a, 6a are provided on the side ends in the longitudinal direction I of the joining member main body 6 made of an elastic material such as rubber or synthetic resin, in this embodiment, on both side ends of the joining member main body 6.
Joint surfaces 2 and 2 of box culverts 1 and 1 facing each other
Is inserted in the joining direction X into the mounting holes 3 and 3 provided at the back from the substantially annular openings 4 and 4 provided at the front (see FIG. 1).

At this time, lip-shaped closing press contact portions 6b, 6 provided on the upper and lower surfaces behind the arrow-shaped locking portions 6a, 6a provided on both ends in the longitudinal direction I of the joining member main body 6.
When the b and 6b are brought into contact with the inner surfaces of the openings 4 and 4 and inserted, the locking portions 6a and 6a are guided and moved in the joining direction X, so that the locking portions 6a and 6a are inserted into the mounting holes 3 and 3. When you insert
In the mounting holes 3, 3, the insertion positions of the locking portions 6 a, 6 a with respect to the mounting holes 3, 3 are accurately positioned without being carelessly bent. Moreover the bonding member body 6 made of an elastic material, the disconnection space portion without a closed end 9a has a junction 9a ₁ of the desired length l ₃ the outer portion of the thickness direction T intersecting the longitudinal direction I By providing 9 in the thickness direction T, the joining member main body 6 is integrally formed to exhibit rigidity. Therefore, the locking portions 6a, 6
a is inserted at a predetermined position in the mounting hole 3 without inconvenience that the center line N is deviated by careless bending. In this embodiment, the bending load of the joint member main body 6 of the disconnection space portion 9 without the outer portion and the closed end 9a is formed in the thickness direction T, the length l ₃ of the joint 9a ₁ of the closed end 9a Is 1 mm or less, the conventional rubber packing simply formed in a bellows shape has a rigidity of about 70 g / 10 cm and has flexibility, but normally 420 g / cm,
Demonstrate high rigidity.

When the locking portions 6a, 6a are inserted into predetermined positions in the mounting holes 3, 3, the lip-shaped closing press contact portions 6b, 6b, 6b provided behind the locking portions 6a, 6a are opened. It is pressed against the inner surface of the opening 4. Accordingly, when the locking portion 6a is inserted into the mounting hole 3 and positioned, the grout material 7 injected into the space K formed between the mounting hole 3 and the locking portion 6a is closed by the press-contact portion 6b. , 6b, 6b are pressed into the opening 4, so that leakage from the openings 4, 4 is prevented.

Thereafter, the grout material 7 is inserted into the space K of the mounting hole 3.
When filled and solidified, the arrow-shaped joint member main body 6 made of an elastic material such as rubber is inserted into the mounting holes 3 and 3 provided in the concrete joints A and B and having a substantially circular cross section. When the grout material 7 is solidified, the grout material 7 is locked together with the locking portions 6a, 6a in the mounting holes 3 and 3 so that the locking portions 6a and 6a are watertightly fixed. At the same time, the concrete joints A and B are joined via the joint member main body 6.

At this time, the engaging portions 6a, 6a provided on both right and left ends of the joining member main body 6 have an outer shape formed in the shape of an arrow, so that the mounting holes 3 having a substantially semicircular cross section for the joints A, B made of concrete. The constricted portions 5 and 5 are formed at a location located at the neck portion between the mounting hole 3 and the constricted opening 4 connected to the mounting hole 3. locking portion 6a which is inserted into the mounting hole 3 than the width opening width l ₁ of the narrow 4 is formed on the large-diameter and distal neck portions the height h of the thickness direction T of, h
Is secured to at least 2 mm, the grout material 7 is solidified, the locking portions 6a, 6a mounted in the mounting holes 3, 3 are firmly fixed, and the pull-out from the mounting holes 3, 3 is ensured. And the water stoppage becomes extremely excellent (see FIG. 4). Thus, concrete joints A and B
The grouting material 7 is injected into the mounting holes 3 and 3 provided at the back of the joining surfaces 2 and 2 by an injector 8, and after filling, the grouting material 7 is provided on the left and right ends of the joining member body 6 made of an elastic material. Part 6
a, 6a are the mounting holes 3, 3 for the concrete joints A, B.
The grouting material 7 is inserted into the inside of the mounting holes 3 and 3 through the joint member body 6 made of an elastic material by a simple handling of being inserted into the inside of the mounting holes 3 and 3 while visually checking the insertion state from outside. The box culverts 1 and 1 are connected to each other quickly and securely.

When a tensile force or a compressive force due to an external force such as ground deformation, ground distortion or vibration due to an earthquake is applied to the joints of the box culverts 1 and 1 of the concrete joints A and B, rubber or synthetic resin is applied. Vibration and the like are absorbed by the elastic restoring property of the joining member body 6 made of an elastic material, and the joint between the concrete joints A and B is not affected. At this time, the joining portion 9 having a desired length l ₃ of 1 mm or less is provided outside the opening space 9 provided in the thickness direction T of the joining member body 6.
Since the closed end 9a having a ₁ is formed and the joining member body 6 is rigid, the concrete joints A and B exhibit rigidity while maintaining the watertightness of the joining member body 6 and are structurally robust. Connected to.

When a tensile force or a compressive force due to an external force such as an earthquake or vibration greater than the elastic limit of the joining member body 6 made of an elastic material is applied to the joining portions of the concrete joints A and B, the joining is performed as described above. In the member main body 6, a thickness direction in which an opening space 9 having a closed end 9 a having a joint 9 a ₁ having a desired length l ₃ of 1 mm or less formed on the outer portion thereof substantially intersects the longitudinal direction I of the joint member main body 6. because it is formed toward the T, the disconnection space portion 9 joining portion 9a ₁ by an external force is broken in the lateral direction of the earthquake or the like joining member body 6 by being separable in the lateral direction in FIG. 5 The bellows form as shown.

At this time, in the present embodiment shown in FIGS. 1 to 6, three opening spaces 9 are provided in the joining member main body 6 so that adjacent ones are formed in directions opposite to each other. and the that, moreover the joints 9a ₁ of the closed end 9a formed on the outer portion with these open column space portion 9 is formed beyond the center line N in the thickness direction T of the joint member main body 6 1
The inner part is formed in the wide part 9b while the inner part is formed to have a desired length l ₃ of not more than mm. Therefore, the bonding member body 6 joints 9a ₁ Oite open column space portion 9 is formed to be Hirakiretsu bellows will substantially average thickness without rise to uneven thickness thereof is in each part plants. In this manner, the thickness of the joining member body 6 becomes uneven, and the joining member body 6 is easily broken, the disadvantage that the breaking strength is low is eliminated, and the elasticity of the joining member body 6 made of an elastic material due to an external force is improved. In the case of this embodiment, the breaking strength of the joining member main body 6 is 80 kg / 10 c.
m, and its elongation amount reaches 115 mm, and exhibits high elasticity. The concrete joints A and B are joined in the longitudinal direction I of the joint member body 6 and in the thickness direction T substantially intersecting with the longitudinal direction I against external force such as an earthquake in a state of being joined via the joint member body 6. It expands and contracts vertically and horizontally, and exhibits extremely high followability. Moreover, the rigidity of the joining member main body 6 and the water stopping property of the joining member main body 6 are improved.

FIGS. 7 and 8 show a second embodiment of the present invention.
This is an example. Wherein in the first embodiment, the joint member main body to open the column space portion 9 provided in the thickness direction of 6, the outer portion and the closed end having a junction 9a ₁ of the desired length, concrete conjugates A, the B When inserted into the openings 4 and 4 communicating with the mounting holes 3 and 3 provided at the back of the joining surfaces 2 and 2, the joining member main body 6 has rigidity and is smoothly inserted without being bent. The joints A and B exhibit rigidity while maintaining the watertightness of the joint member main body 6, and are connected in a structurally robust manner. However,
In this embodiment, the opening space 9 provided in the joining member body 6 is provided.
Has a desired length l ₃ whose outer end is provided with a gap in advance.
By forming the contact portion 9'a _1, openings 4, 4 communicating with the mounting hole 3, 3 provided concrete conjugate A, to B
Contact portion when inserting the joint member main body 6 to 9'a _1, 9 '
Contact portion 9 gaps between a ₁ is closed as a closed end 9a '
The joining member main body 6 exhibits rigidity due to the contact between a ₁ and 9′a ₁ , so that the joining member main body 6 can be inserted smoothly. Then, when the ground changes due to an earthquake or an external force such as a tensile force or a compressive force exceeding a predetermined magnitude such as ground strain or vibration is applied to the joints of the concrete joints A and B, the space for opening is required. As shown in FIG. 8, the joining member main body 6 is formed in a bellows-like shape, and expands and contracts vertically and horizontally, so that the joining member main body 6 can follow the external force such as an earthquake or the like. Other than that, the configuration and operation are the same as those of the first embodiment.

FIG. 9 shows a third embodiment of the present invention. In the first and second embodiments, the rear part of the arrow-shaped locking portion 6a provided at the side end of the joining member main body 6 is shown. Although the closing pressure contact portions 6b provided on the upper surface and the lower surface can be locked in the insertion direction S of the locking portion 6a, a lip shape is shown.
In this embodiment, a tapered surface 6c is formed from the front end constricted portion of the locking portion 6a to the joining member main body 6 so that the closed pressure contact portions 6b 'which can be pressed against the inner surfaces of the openings 4 and 4 are provided on the left and right upper and lower surfaces. This embodiment is different from the above embodiments in that it is formed so as not to leak out when the grout material 7 is filled and solidified, and the other configurations are the same as those in the above embodiments. There is.

In the above description, concrete joints A,
Although the box culverts 1 and 1 are described as a preferred embodiment as B, the concrete joints A and B are not limited to the box culverts 1 and 1 shown in the drawings, and may further include side grooves, U-shaped grooves, and the like. Civil engineering materials such as underground buried structures such as sewage pipes and common ditches, and ground structures such as tunnels and retaining walls, and construction materials such as outer wall panels, inner wall panels, ceiling panels, floor panels, and slab boards. The invention applies. In the above description, the joining member main body 6 used when joining the box culverts 1 and 1 is formed in a substantially annular front surface corresponding to the openings 4 and 4 facing the joining surfaces 2 and 2. However, this is merely an example, and when the concrete joints A and B are side grooves or U-shaped grooves, the joining member main body 6 is not formed in a substantially annular front surface but is formed in an end shape. It is formed.

In each of the above embodiments, the opening space portions 9 extending in the thickness direction T intersecting with the longitudinal direction I of the joining member main body 6 made of an elastic material are independently formed in a cross section of the opposite direction to be substantially annular in front. Although it is formed, this opening space 9
Closed end having a junction 9a ₁ on the outer peripheral portion of the Hirakiretsu space portion 9 when also inserting the engagement portion 6a into the mounting hole 3 things formed on the outer peripheral surface of the joint member main body 6 in a spiral in the circumferential direction either form 9a, or the disconnection space portion outer peripheral contact portion 9'a ₁ through a gap of 9, at the time of insertion by providing a 9'a ₁ to demonstrate the rigidity by which to close a closed end 9a The locking portion 6a can be inserted into a predetermined position. And, when a large external force such as an earthquake acts, the opening space 9 is opened and the joining member main body 6 becomes bellows-like, which is within the applicable range of the present invention.

In the first and second embodiments, the lip-shaped closing pressure contact portions 6b provided at the side ends of the joining member main body 6 are provided on the upper and lower surfaces behind the locking portions 6a. The number of the closed press contact portions 6b is not limited to this, and the filling pressure of the grout material 7 filled in the mounting hole 3 is large or small. An appropriate number is selected according to the length of the installation distance to be reached and the length of the longitudinal direction I of the joining member main body 6, and the increase or decrease can be freely changed.

In the first, second, and third embodiments, the engaging portions 6a, 6a
To form mounting holes 3 and 3 for concrete joints A and B
The locking portion 6 is inserted into the mounting hole 3 of one concrete joint A.
a is formed at one side end of the joining member main body 6, and the other end of the joining member main body 6 is provided with another attaching means without using the locking portion 6 a.
For example, the joining member main body 6 may be attached to the other concrete joint B by providing an engaging portion and embedding it in the concrete joint B, or using an anchor component. Although not shown in the drawing, even when a lip-shaped closing press contact portion 6b is formed on the joining member main body 6 on one side of the upper surface or the lower surface located behind one of the locking portions 6a, this closing press contact portion 6b Is brought into contact with the inner surface of the opening 4 so that the locking portion 6
a into the mounting hole 3 by guiding the insertion of
a can be smoothly and reliably inserted into a predetermined position without bending. The locking portion 6a used in the first, second, and third embodiments is formed in an arrow shape in the drawing, but the outer shape thereof is not limited to that shown in the drawings. The constricted portions 5 and 5 formed at locations connected to the openings 4 and 4 may be formed to have a substantially semi-elliptical cross section with a diameter larger than the opening width l ₁ .

[0041]

As described above, according to the present invention, at least one side end of a joining member body formed of an elastic material is inserted into a mounting hole provided at a depth from an opening facing a joining surface of a concrete joint. An arrow-shaped locking portion to be locked is provided, and an opening space portion is formed in the joining member body in a thickness direction substantially intersecting with the longitudinal direction thereof, so that when joining concrete joints to each other. The joining member body made of an elastic material exhibits rigidity and is integrated. For this reason, after grouting material is injected and filled in the mounting hole, a predetermined locking portion is formed in the mounting hole by visually confirming the locking portion formed on the longitudinal side end of the joining member body formed of the elastic material. By inserting the grout material easily and securely in the position, the grout material can be solidified and the locking part can be installed in the mounting hole, so that even non-skilled people can efficiently join concrete with simple handling operation in a short time The joining work between objects can be performed. Also, after the concrete joints are joined, the concrete joints have sufficient rigidity, and if an external force such as an earthquake or vibration is applied more than necessary, it will be used to extend the joining members in the thickness direction. Since the space is wide open and the joining member body is opened in a bellows shape, the ability to follow the joints of concrete joints with each other against earthquakes etc. is improved, it is rich in elasticity, and the water stoppage is excellent. become. Furthermore, since the concrete joints can be joined to each other only by using the joining member body made of an elastic material and the grout material, the number of parts is small, the production and design are easy, the production cost, the construction cost, Material costs are lower.

[Brief description of the drawings]

FIG. 1 is an enlarged perspective view showing a joint state of a concrete joint according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view for explaining a state in which a grout material is injected into a mounting hole of a concrete joint by an injector to join the concrete joints to each other.

FIG. 3 is an enlarged sectional view for explaining a state in which a grout material is filled in a mounting hole of a concrete joint.

FIG. 4 is an enlarged cross-sectional view showing the present embodiment in a state in which an engaging portion provided at a side end of the joining member main body is inserted into a mounting hole of a concrete joint.

FIG. 5 is an enlarged cross-sectional view showing the present embodiment in a state where the concrete joints are joined to each other via the joint member main body and the opening space is opened.

FIG. 6 is a perspective view showing the whole when joints made of concrete are connected to each other using the joint member main body.

FIG. 7 is an enlarged cross-sectional view showing a second embodiment of the present invention, in which a locking portion provided at a side end of a joining member main body is inserted into a mounting hole of a concrete joint.

FIG. 8 is an enlarged sectional view showing the embodiment in a state where the concrete joints are connected to each other via the joint member main body and the opening space is opened.

FIG. 9 is an enlarged sectional view showing a state of connection between concrete joints according to a third embodiment of the present invention.

FIG. 10 is a cross-sectional view showing one example of a conventional joining method showing a state where concrete joints are connected to each other.

FIG. 11 is a side view showing another example of the conventional joining method showing a state where concrete joints are connected to each other.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 Box culvert 2 Joining surface 3 Mounting hole 4 Opening 6 Joining member main body 6a Locking part 6b Closing pressure contact part 7 Grout material 9 Opening space part 9a Closed end 9a ₁ Joining part 9'a ₁ Contact part 9b Wide part A Concrete joint B Concrete joint I Longitudinal direction K Space N Centerline T Thickness direction h Height l ₃ Length

 ────────────────────────────────────────────────── ─── Continued on the front page F term (reference) 2D063 BA24 BA26 BA27 BA28 BA31 2E109 AA07 AB04 BA06 CA01 CA02 CB01 DA01 DB04 DB13 EA03 EA05 EA08 EB00 FA02 FA03 FA05 2E125 AA75 AF01 AG13 AG47 AG60 BD03 CA65 CA82

Claims (12)

[Claims] 1. A step of injecting and filling a grout material into a mounting hole provided at the back of a joint surface of a concrete joint,
A step of inserting a locking portion formed at a side end in the longitudinal direction of the joining member main body formed of an elastic material into the mounting hole; and solidifying the grout material to fix the locking portion to the mounting hole. And a concrete joint is joined to each other via a joint member body. 2. The concrete-made grout according to claim 1, wherein said grout material is press-fitted from an opening facing a joint surface of the concrete-made joint into a mounting hole provided at the back of said opening. Waterproofing method for joints. 3. The joining member body has an arrow-shaped locking portion formed at a side end in the longitudinal direction so as to be locked in the mounting hole, and a thickness direction intersecting the locking portion in the longitudinal direction behind the locking portion. A closing press-contact portion provided to be pressed against an opening facing the joining surface of the concrete joint, and an outer portion provided in the thickness direction behind the close press-contact portion when the insertion hole is inserted into the mounting hole, forming a closed end, and a predetermined external force. 2. A waterproofing part for a concrete joint according to claim 1, wherein the joint part is formed from a joint part which can be separated and stretched when water is added or an opening space part which has a contact part through a gap. Construction method. 4. An arrow-shaped latch which is latched from at least one side end of a joining member body formed of an elastic material through an opening facing a joining surface of a concrete joint into a mounting hole provided at the back thereof. A joining member for waterproofing a concrete joint, wherein a joining space is formed in the joining member main body, and a space for opening is formed in the joining member main body, the opening space portion substantially intersecting with the axial length direction. 5. The opening is formed so that an inner shape thereof is tapered toward a large-diameter mounting hole provided in a deep portion of a joint surface of a concrete joint, and is formed at a boundary between the mounting hole and the opening. 5. The concrete joint according to claim 4, wherein a constricted portion is formed in the located neck portion, and an installation width between the locking portions of the joining member main body is formed smaller than an opening width of the constricted portion. A joining member for waterproofing objects. 6. The concrete member according to claim 4, wherein the joining member main body is provided with a closing press-contact portion pressed against the opening behind the locking portion on at least one of an upper surface and a lower surface. A joining member for waterproofing a joint. 7. The opening space portion has an outer portion in the thickness direction of the joining member body as a detachable closed end having a joining portion of a desired length, and an inner portion of the opening space portion is formed as a wide portion. The joint member for waterproofing a concrete joint according to claim 4, wherein the joint member is made of water. 8. The opening space portion has an outer portion in the thickness direction of the joining member body serving as a contact portion through a gap having a desired length, and an inner portion of the opening space portion is formed as a wide portion. The joint member for waterproofing a concrete joint according to claim 4, characterized in that: 9. The concrete according to claim 4, wherein a plurality of the opening spaces are provided in mutually adjacent directions opposite to each other. A joining member for waterproofing a joined product. 10. The method according to claim 4, wherein the opening space portion is formed beyond a center line of a thickness of the joining member main body. A joint member for waterproofing a concrete joint according to the above aspect. 11. The connection part according to claim 7, wherein the joint part disposed outside the opening space part has a length of about 1 mm or less. Joint member for waterproofing concrete joints. 12. A desired number of said closing press-contact portions are formed obliquely so as to be lockable in a direction in which said locking portion is inserted into a mounting hole, and have a lip shape having a length longer outside said locking portion. The joint member for stopping water of a concrete joint according to claim 6, wherein: