JP2002038507A - Corrosionproof-plate joint member and execution method using it - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a joint member, which surely joints an opening without forming the opening in a joint section and can interrupt a substance noxious to concrete, because the joint section is coated with a caulking material made of a synthetic resin and jointed in conventional devices when a corrosionproof plate is executed onto the surface of a concrete surface but there is the possibility of the remaining of a position not filled with the caulking material and there is possibility that corrosive liquid and gas infiltrate from a joint at the position not filled with the caulking material and there is the possibility of damage on internal concrete. SOLUTION: In the joint member 10, one ends of plate sections 12 and 13 for supporting a rear are connected at internal positions from the left-right side edges of the rear of a plate section 11 for supporting a surface on the rear of the plate section 11 through connecting sections 14, 15 respectively. The corrosionproof plate is inserted and connected into grooves 22 and 23 for insertion formed of the plate section 11 for supporting the surface and the plate sections 12 and 13 for supporting the rear. The projecting sections 24 of the plate sections for supporting the rear are projected from the side edges of the plate section 11 for supporting the surface.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anticorrosion plate joint for connecting an anticorrosion plate and a construction method using the same.

[0002]

2. Description of the Related Art Concrete structures are exposed to various liquids and gases depending on the installation environment, and corrosion and deterioration may proceed excessively. For example, various corrosive gases and liquids flow in sewer pipes such as manholes. Especially in sewage environment, hydrogen sulfide generated from organic matter in sewage produces sulfuric acid by microbial action, causing corrosion of concrete wall,
Promotes deterioration. Also, concrete degradation is likely to occur in places exposed to salt damage, such as coasts.

Therefore, a technique (resin lining method) of applying a resin to the concrete surface to protect the concrete from harmful substances has been proposed. As the resin lining method, there are a method of applying a resin liquid by a trowel, a brush, a spray, or the like, and a method of attaching a resin sheet.

[0004] In recent years, it has become clear that FRP has better anticorrosion ability than that of a resin alone, and the FRP lining method has also been implemented. In the FRP lining method, a glass fiber is impregnated with a resin on site, and the glass fiber is laminated on a dried and solidified concrete surface.

However, the resin lining method and the FRP lining method are all wet methods and use a curing agent or a solvent, so that sufficient ventilation must be performed to ensure safety. However, depending on the work site, sufficient ventilation may be difficult. Also, if the concrete surface is wet, there is a problem that the adhesion between the resin and the FRP becomes very poor. In addition, FRP has a problem that the adhesive strength to concrete is not so good, so that it is easily peeled off.

In order to solve the problem of solvent volatilization, a dry method has been proposed in which a preformed synthetic resin anticorrosion plate or FRP anticorrosion plate is bonded to the concrete surface. Japanese Utility Model Registration No. 2594065 discloses an anticorrosion plate for use in the dry method, wherein the anticorrosion plate is provided with a synthetic resin layer on one surface of a three-dimensional knitted fabric. As a method of applying the anticorrosion plate, at the stage of shaping and solidifying the cement paste, the three-dimensional knitted fabric side of the anticorrosion plate is brought into close contact, and solidified in a state where concrete enters the voids in the three-dimensional knitted fabric. Thereby, the synthetic resin layer can be firmly fixed to the concrete surface and can be formed.

When the concrete is already solidified, or when an anticorrosion plate is laid for repairing the existing concrete, a cement paste is applied to the surface of the concrete, and the anticorrosion plate is pressed against the concrete paste to form a three-dimensional knitted fabric. The cement paste is put into the tub and laid. Also in this case, the anticorrosion plate is firmly fixed to the concrete wall surface by the anchor effect of the three-dimensional knit.

[0008]

Conventionally, a joint is made by applying a synthetic resin caulk to joints where individual anticorrosion plates are adjacent to each other.
Since this joint stopping operation is a manual operation, an unfilled portion of the caulking material may remain at the joint. If there is an unfilled portion, even if the concrete surface is covered with the anticorrosion plate, corrosive liquid or gas entering from the joint of the unfilled portion may damage the concrete inside. Also, caulking material is relatively weak to impact,
It may be damaged by some impact. In addition, the operation of pasting the anticorrosion plate and then stopping the joint has a problem that it is complicated and time-consuming.

In view of the above, an object of the present invention is to provide an anticorrosion plate joint member capable of securely stopping a joint which is adjacent to the anticorrosion plate without forming a gap between adjacent joints and blocking a substance harmful to concrete. It is another object of the present invention to provide a method that can be easily performed by using the anticorrosion plate joint member.

[0010]

The anticorrosion plate joint member according to the present invention is a joint member for connecting two or more anticorrosion plates, and comprises one surface support plate portion and two back surface support plate portions. These plate portions are the back surface of the surface support plate portion, and one end of the back surface support plate portion is connected to a position inside the left and right side edges via a connection portion. The front surface support plate portion and the back surface support plate portion are substantially parallel to each other, and a gap formed by the front surface support plate portion and the back surface support plate portion (hereinafter, referred to as an insertion groove) In some cases) for the insertion of the anticorrosion plate, and the gist is that the other end side edge of the back surface support plate portion is located outside the side edge of the surface support plate portion.

The joint member of the present invention is used as a substitute for applying a caulking material to joints.
By using this joint member, it is possible to reliably cover the concrete surface without creating a gap such as an unfilled portion of the caulking material. That is, as described above, the joint member of the present invention is provided with the first and second back surface supporting plate portions substantially parallel to the back surface side of the front surface supporting plate portion. The anticorrosion plate is connected by inserting the anticorrosion plate into the insertion groove formed by the first and second back support plates so as to sandwich the anticorrosion plate. And the joint member can cover the concrete surface without gaps.

Moreover, even if the size of the anticorrosion plate is slightly different from the construction site, the difference in the size can be reduced by inserting the anticorrosion plate deeply or shallowly into the insertion groove of the joint member. It can be absorbed and there is no gap on the surface where the joint member and the anticorrosion plate are combined.

In addition, because the other end side edge of the back surface supporting plate portion is located outside the side edge of the front surface supporting plate portion, that is, the back surface supporting plate portion protrudes longer. When inserting the anticorrosion plate into the insertion groove formed by the front support plate portion and the back support plate portion, insert the end portion of the anticorrosion plate into contact with the overhanging surface of the back support plate portion. By doing so, the anticorrosion plate can be easily inserted. Note that there is no step between the other end side edge of the back surface supporting plate portion and the side edge of the surface supporting plate portion. For example, in the case of a joint member having an H-shaped cross section, an anticorrosion plate is inserted into the groove portion for insertion. In doing so, it is necessary to accurately position and insert the anticorrosion plate in the groove, and the insertion work becomes difficult.

[0014] In order to firmly fix the inserted anticorrosion plate to the joint material, it is desired to apply an adhesive or the like to the joint surface. It is easy to apply an adhesive to the overhanging portion or to attach an adhesive double-sided tape.

The construction method according to the present invention includes a step of attaching the anticorrosion plate joint member to a concrete surface, a step of attaching an anticorrosion plate to the anticorrosion plate joint member, the anticorrosion plate and the anticorrosion plate joint member, The gist of the present invention is to include a step of injecting a filling material (hereinafter, sometimes referred to as a backfill material) into a gap formed by the wall surface.

In this manner, the joint member and the anticorrosion plate are installed in such a manner as to assemble the prefabrication, and then the backfill material is injected. Therefore, the method is simple, requires no skill, and shortens the construction period. Can be planned. In addition, a synthetic resin caulking material generally used as a jointing caulking material has a problem of causing poor curing and poor adhesion in a high humidity environment, but in the present invention, the joint portion of the anticorrosion plate is used. In addition, since the molded joint member is used, the anticorrosion coating layer can be stably formed even in a wet environment.

Further, in the anticorrosion plate joint member according to the present invention, a side projection projecting inward from the front surface supporting plate portion is provided at a connection point between the back surface supporting plate portion and the connecting portion. It is preferred that

[0018] The anchoring effect of the side projections ensures the fixation to the backfill material, and also secures the fixation to the spacer used when attaching the anticorrosion plate joint member to the concrete surface. Can be.

In addition, in the anticorrosion plate joint member according to the present invention, it is preferable that a notch extending parallel to the left and right side edges is formed in the center of the surface support plate portion.

For example, when an anticorrosion plate is applied to a curved concrete surface, it may be necessary to bend the anticorrosion plate joint member. At this time, if there is a cutout as described above, it is possible to bend easily. . It is also possible to bend at the above-mentioned notch to form an L-shaped cross section and to be applied to a 90 ° corner.

Further, the anticorrosion plate joint member is preferably made of a thermoplastic resin, and can be easily bent by heating.

Further, in the anticorrosion plate joint member according to the present invention, it is preferable that a side edge of the surface supporting plate portion is thinned in an arc shape toward the back surface supporting plate portion.

[0023] Accordingly, no sharp step is formed between the anticorrosion plate inserted into the insertion groove and the side edge of the surface support plate portion, and the joint member and the anticorrosion plate are connected with their surfaces being smooth. You.

In addition, it is preferable that the anticorrosion plate joint member according to the present invention is one in which a hole for engaging the head of an anchor bolt is formed in the back support plate.

When attaching the joint member to a concrete wall surface, it is conceivable to attach the joint member using a concrete bolt. At this time, the concrete bolt head is engaged with the hole so that the head does not protrude. In this case, the concrete bolts will be covered with an anticorrosion plate or the like and will not be exposed. Therefore, even if the concrete bolt is made of metal, there is no risk of corrosion.

[0026]

FIG. 1 is a view showing an anticorrosion plate joint member according to an embodiment of the present invention. FIG. 1 (a) is a perspective view of a front surface thereof, and FIG. 1 (b) is a perspective view of a back surface thereof. FIG. FIG. 2 is a sectional view taken along line AA shown in FIG.

The anticorrosion plate joint member 10 has a front surface supporting plate portion 11 and two back surface supporting plate portions 12 and 13 connected to the connecting portion 1.
4 and 15, the connection position is on the back surface of the surface supporting plate portion 11 and is slightly inside the left and right edges 11 _L and 11 _R. One ends of the use plate parts 12 and 13 are connected via the connection parts 14 and 15. The front surface supporting plate portion 11 and the back surface supporting plate portions 12 and 13 are positioned in parallel, and an insertion groove (gap) is provided between the front surface supporting plate portion 11 and the back surface supporting plate portions 12 and 13. 22 and 23 are formed. The other end 12e, 13e of the back surface supporting plate portion 12 is positioned from the position of the edge 11 _R, 11 _L of the surface supporting plate portion 11 outwardly, tension is back supporting plate part 12, 13 has a shape such as out (projecting portion 24: portion of the edge 11 _R, 11 _L position corresponding to the other end 12e, 13e).

An inner one end of the right back support plate 12 and an inner one end of the left back support plate 13 face each other. Are formed. At the connection points between the back surface supporting plate portions 12 and 13 and the connecting portions 14 and 15, side portions 16 and 17 projecting inward are provided.

A plurality of holes 19 are provided in the overhanging portions 24 of the back support plates 12, 13. The hole 19 has a shape in which the front side of the back support plates 12 and 13 is tapered, and is shaped to engage with the head of the concrete bolt.

The surface support plate 11 is thicker at the center and thinner toward the side edges 11 _R and 11 _L.
The portions 1 _R and 11 _L are arc-shaped and thin. The center of the surface support plate part 11 also edges 11 _R, 11 _L and extending parallel to the notches 18a, 18b are provided on both sides.

The joint member 10 is made of vinyl chloride, and can be easily bent by heating.

Next, a method of constructing using the joint member 10 of this embodiment will be described by taking as an example a case of constructing an existing cylindrical concrete. 3 to 5 are partially cutaway perspective views for explaining this construction process.

First, the deteriorated portion of the concrete surface 30 is removed (FIG. 3), and then the concrete anchor bolt 29
The joint member 10 for vertical joint is installed and fixed on the concrete wall 30 by using. At this time, a spacer 31 made of a hard sponge is inserted into the inner space 20 of the joint member 10 in some places (discontinuously), and the concrete wall 3 is formed.
The gap (gap) 50 is formed by separating the joint member 10 at a desired interval from the surface 0 (see FIG. 6). As the hard sponge spacer, a spacer having a different thickness according to the height difference (unevenness) of the surface of the concrete wall 30 may be used, and some irregularities on the surface of the concrete wall 30 are absorbed by the shrinkage of the spacer. be able to. Note that the spacer 31 may be successively fitted into the inner space 20 of the joint member 10.

Next, the anticorrosion plate 40 is connected to the joint member 10.
Into the insertion grooves 22, 23 for assembling. At this time, an adhesive sealing agent (for example, a silicone sealing agent or an epoxy sealing agent) 41 is applied or filled on the inner surfaces of the insertion grooves 22 and 23.

Then, while inserting the joint member 10 for side joints into the anticorrosion plate 40, a spacer is fitted into the joint member inner space 20 in the same manner as described above, and is installed and fixed to the concrete wall 30 using the concrete bolt 29 (see FIG. (Fig. 4).

The installation of the joint member 10 for vertical joints, the insertion of the anticorrosion plate 40, and the installation of the joint member 10 for horizontal joints are repeated to be piled up on the circumference, so that the anticorrosion plate 40 has a desired area. Install.

Thereafter, the joint member 10 and the anticorrosion plate 4
A liquid backfill material (filling material: cement-based grout-resistant material, for example, cement) 51 is injected into a space 50 formed between the surface 0 and the surface of the concrete wall 30 and solidified (FIG. 5). Examples of the backfill material include, in addition to the above, inorganic materials such as cement grout materials, organic materials such as epoxy resin grout materials, and organic-inorganic composite materials such as polymer cement grout materials. Good to use.

As described above, the anticorrosion plate 40 is installed on the surface of the concrete wall 30.

6 and 7 are enlarged sectional views showing the vicinity of the joint member 10 constructed on the concrete wall surface. FIG. 6 shows a case where the anticorrosion plate 40 is straight, and FIG. 7 shows a case where the anticorrosion plate 40 has an arc shape. . The same components as those in FIGS. 1 to 5 are denoted by the same reference numerals, and redundant description will be avoided.

As shown in the figure, the anticorrosion plate 40 is inserted into the insertion grooves 22 and 23 of the joint member 10.
Insert grooves 22, 23 while contacting overhangs 24 of 2, 13
The anticorrosion plate 40 can be easily inserted into the insertion grooves 22 and 23 of the joint member 10.

The anticorrosion plate 40 is formed by the sealing agent 41 applied (or filled) in the insertion grooves 22 and 23.
Is securely fixed to the joint member 10, so that an accident that the anticorrosion plate 40 comes off before the backfill material 51 is injected can be prevented. Further, since the sealing agent 41 serves to fill the gap between the anticorrosion plate 40 in the insertion grooves 22 and 23, the backfill material 51 does not leak,
Also, it is possible to prevent hydrogen sulfide gas and the like from flowing into the back side (concrete side). Since the same material as concrete is used for the backfill material 51, it is easily corroded by hydrogen sulfide gas or the like as in the concrete wall 30.

As the anticorrosion plate 40, a plate provided with a synthetic resin layer 42 on one surface of a three-dimensional knitted fabric 43, such as that shown in the above-mentioned utility model registration number 2594065, is preferable.
If the three-dimensional knit 43 at the tip of the inserted portion of the anticorrosion plate 40 is cut in advance before insertion into the joint member 10, the insertion becomes easy.

The projecting portions 16, 17 projecting toward the inner space 20 of the joint member 10 exhibit an anchoring effect on the solidified backfill material 51, so that the joint member 10 can be easily peeled off. Absent. In addition, since the side projections 16 and 17 hold the spacer fitted in the inner space 20, the spacer does not come off easily. The backing material 51 enters the three-dimensional knitted fabric and the anticorrosion plate 40 is firmly fixed in the same manner as described above. Moreover, since the concrete wall 30 and the backfill material 51 are the same material, they are well-known and are less likely to peel.

As described above, the hole 19 for the concrete bolt 29 of the joint member 10 is
13, the hole 19 is shaped so that the head of the concrete bolt 29 fits into the hole 19, so that the head of the concrete bolt 29 does not come out to the front side, and is covered with the anticorrosion plate 40. be able to. Therefore, since the concrete bolt 29 is not exposed to corrosive liquid or gas,
A material that is easily susceptible to corrosion by sulfuric acid or the like, such as iron, may be used, and the material is not limited.

Further, since the side edges 11 _L and 11 _R of the surface support plate 11 of the joint member 10 are arc-shaped, the surface of the anticorrosion plate 40 and the surface of the surface support plate 11 smoothly continue. .

In addition, for example, as shown in FIG. 4, in order to dispose the joint member 10 at the side joint, a joint member 10 that is bent in an arc shape in the longitudinal direction is necessary. Since it is manufactured, it can be easily bent by heating, so that the shape can be easily corrected even at the construction site. Further, in the joint member 10 provided with the notches 18a and 18b, the bending and bending in the width direction become easier. In addition, the notch 18a can be used as a guide of the position when the joint member is installed.

When the deformable joint member 10 and the anticorrosion plate are applied to concrete surfaces having various shapes as described above, the entire concrete surface can be covered. Since the plates 40 are connected by the joint member 10 and no joint gap is formed on the construction surface, corrosive liquids and gases do not reach the concrete. In addition, this prefabricated construction method can shorten the construction period and can be performed even in a highly humid environment, so that the construction environment is not limited.

As described above, the joint member according to the present invention and the construction method using the same have been specifically described with reference to the drawings showing examples. However, the present invention is not necessarily limited to the illustrated examples. It is also possible to implement the present invention with appropriate modifications within a range that can be adapted to the above-mentioned purpose, and all of them are included in the technical scope of the present invention.

For example, the material of the joint member is not limited to the above-mentioned vinyl chloride, but may be an amorphous plastic such as polystyrene or methacrylic resin, or a crystalline plastic such as polystyrene, polypropylene, polyacetal, saturated polyester or fluororesin, or polyphenylene sulfide or polyphenylene. Thermoplastic resins such as engineering plastics such as oxide and polyetheretherketone may be used. When bending is unnecessary, a thermosetting resin may be used.

In the above-described embodiment, the small projections 16 and 17 are small. However, the projections 16 and 17 may be extended, or may be hook-shaped projections 16 and 17.

[0051]

According to the anticorrosion plate joint member and the construction method using the same according to the present invention, it is possible to completely cover the concrete surface without forming a gap between adjacent joints. Thus, substances harmful to concrete can be blocked. Moreover, the construction is simple, the construction period can be shortened, and the construction environment is not limited.

[Brief description of the drawings]

FIG. 1 is a perspective view showing an anticorrosion plate joint member according to an embodiment of the present invention.

FIG. 2 is a cross-sectional view taken along line AA shown in FIG.

FIG. 3 is a partially cutaway perspective view for explaining a process of constructing using the joint member of the embodiment shown in FIG. 1;

FIG. 4 is a partially cutaway perspective view for explaining a process of performing the construction using the joint member of the embodiment shown in FIG. 1;

FIG. 5 is a partially cutaway perspective view for explaining a process of performing the construction using the joint member of the embodiment shown in FIG. 1;

FIG. 6 is an enlarged sectional view showing the vicinity of a joint member constructed on a concrete wall surface.

FIG. 7 is an enlarged sectional view showing the vicinity of a joint member constructed on a concrete wall surface.

[Explanation of symbols]

10 joint member 11 surface support plate part 11 _L, 11 _R edges 12, 13 backing plate part 12e, 13e and the other end 14, 15 connecting portions 16 and 17 Tsukuride portion 18a, 18b notch 19 hole 20 inside Space 22, 23 Insert groove 24 Overhang 29 Concrete bolt 30 Concrete wall 40 Anticorrosion plate 41 Sealing agent 42 Synthetic resin layer 43 Solid knitted fabric 50 Void 51 Back filling material

 ────────────────────────────────────────────────── ─── Continuing on the front page (72) Takashi Arai 1-14-6, Minamibeppu, Nishi-ku, Kobe-shi, Hyogo Japan Inside Jicco Co., Ltd. (72) Yoshiki Nagai 2-83-3, Shibata, Kita-ku, Osaka-shi Japan Polyester Co., Ltd. (72) Inventor Satoshi Sugihara 2-83-3, Shibata, Kita-ku, Osaka F-term (reference) in Japan Polyester Co., Ltd. 2D047 BA00 2D063 EA08 3H024 EA01 EC09 ED01 EE05

Claims (7)

[Claims] 1. A joint member for connecting two or more anticorrosion plates, comprising one surface support plate portion and two back surface support plate portions, wherein these plate portions are the surface support plate. One end of each of the back support plates is connected to the back surface of the portion at a position inside the left and right side edges via a connecting portion, and the front support plate and the back support plate Parts are substantially parallel, and a gap formed by the front surface supporting plate portion and the back surface supporting plate portion is used for inserting the anticorrosion plate, and the back surface supporting portion is more than a side edge of the surface supporting plate portion. An anticorrosion plate joint member, wherein the other end side edge of the use plate portion is located outward. 2. The anticorrosion plate joint member according to claim 1, wherein a side projection projecting inward from the front surface supporting plate portion is provided at a connection point between the back surface supporting plate portion and the connecting portion. 3. A notch extending parallel to the left and right side edges is formed at the center of the surface supporting plate.
Or the anticorrosion plate joint member according to 2. 4. The anticorrosion plate joint member according to claim 1, wherein a side edge of the front surface supporting plate portion gradually becomes thinner toward the rear surface supporting plate portion. 5. The back support plate is provided with a hole for engaging the head of an anchor bolt.
5. The anticorrosion plate joint member according to any one of 4. 6. The anticorrosion plate joint member according to claim 1, wherein the anticorrosion plate joint member is made of a thermoplastic resin. 7. The step of attaching the anticorrosion plate joint member according to claim 1 to a concrete wall surface; the step of attaching an anticorrosion plate to the anticorrosion plate joint member; and the anticorrosion plate and the anticorrosion plate joint. A construction method comprising a step of injecting a filling material into a gap formed by a member and the concrete surface.