JP4510999B2 - Anticorrosion plate joint member and construction method using the same - Google Patents

Description

[0001]
BACKGROUND OF THE INVENTION
The present invention relates to an anticorrosion plate joint member for connecting an anticorrosion plate, and a construction method using the same.
[0002]
[Prior art]
Depending on the installation environment, a concrete structure may be exposed to various liquids and gases, resulting in excessive corrosion and deterioration. For example, various corrosive gases and liquids flow in manholes and other sewage pipes. In particular, in sewage environments, hydrogen sulfide generated from organic substances in sewage produces sulfuric acid by microbial action, which causes corrosion and deterioration of concrete walls. Promote. In addition, concrete deterioration is likely to occur in places exposed to salt damage such as the coast.
[0003]
Therefore, a method (resin lining method) has been proposed in which a resin is applied to the concrete surface to protect it from substances harmful to the concrete. Examples of the resin lining method include a method in which a resin liquid is applied by a trowel, a brush, or a spray, and a method in which a resin sheet is attached.
[0004]
In recent years, it has been clarified that FRP has a better anticorrosion ability than a resin alone, and an FRP lining method has also been implemented. The FRP lining method is performed by a method in which glass fiber is impregnated with resin on the spot and laminated on the concrete surface that has been dried and solidified.
[0005]
However, since the resin lining method and the FRP lining method are both wet methods and use a curing agent or a solvent, ventilation must be sufficiently performed to ensure safety. However, sufficient ventilation may be difficult depending on the work site. Further, when the concrete surface is wet, there is a problem that the adhesion of the resin and FRP becomes very poor. In addition, FRP has a problem that it is easy to peel off because of its poor adhesion to concrete.
[0006]
Therefore, in order to solve the problem of solvent volatilization, a dry method has been proposed in which a pre-molded synthetic resin anticorrosion plate or FRP anticorrosion plate is bonded to the concrete surface. Utility model registration number 2594065 shows an anticorrosion plate used in the dry method, and the anticorrosion plate is provided with a synthetic resin layer on one side of a three-dimensional knitted fabric. As the construction method of this anti-corrosion board, at the stage of shaping and solidifying the cement paste, the anti-corrosion board is solidified with the solid knitting side facing and solidified with the concrete entering the voids in the three-dimensional knitting. Thus, the synthetic resin layer can be firmly fixed on the concrete surface and formed in a state.
[0007]
Also, when the concrete has already solidified or when a corrosion protection plate is laid for the purpose of repairing the existing concrete, apply the cement paste to the concrete surface and press the corrosion protection plate on it to put the cement paste in the three-dimensional knitted fabric. Is laid and laid. Also in this case, the anticorrosion board is firmly fixed to the concrete wall surface by the anchor effect of the three-dimensional knitted fabric.
[0008]
[Problems to be solved by the invention]
By the way, joints are conventionally applied to the joints where the individual anticorrosion plates and anticorrosion plates are adjacent by applying a synthetic resin caulking material. However, this jointing operation is a manual operation. May leave unfilled portions of caulking material. If there is an unfilled portion, even if the concrete surface is covered with a corrosion prevention plate, there is a risk of damage to the internal concrete due to corrosive liquid or gas that has entered from the joints of the unfilled portion. In addition, the caulking material is relatively weak against impact, and may be damaged by receiving some impact. In addition, the operation of attaching the anticorrosion plate and then performing joint sealing has a problem that it is complicated and takes time.
[0009]
Therefore, in the present invention, an object of the present invention is to provide an anticorrosion plate joint member capable of reliably stopping a corrosion prevention plate and an anticorrosion plate without creating a gap in an adjacent joint portion and blocking substances harmful to concrete, and It aims at providing the method which can be constructed easily using this anti-corrosion board joint member.
[0010]
[Means for Solving the Problems]
The anticorrosion plate joint member according to the present invention is a joint member for connecting two or more anticorrosion plates, and has one surface support plate portion and two back surface support plate portions, and these plate portions are: One end of the back surface support plate portion is connected to the inner surface of the back surface of the front surface support plate portion from the right and left side edges thereof via a connecting portion, and the front surface support plate portion and The back surface support plate portion is substantially parallel, and a gap formed by the front surface support plate portion and the back surface support plate portion (hereinafter sometimes referred to as an insertion groove) of the anticorrosion plate. The gist is that the other end side edge of the back surface supporting plate portion is positioned outward from the side edge of the front surface supporting plate portion.
[0011]
The joint member of the present invention is used as an alternative to applying a caulking material to the joint portion. By using this joint member, there is no risk of creating a gap such as an unfilled portion of the caulking material, and the concrete surface can be reliably obtained. It becomes possible to cover. That is, as described above, the joint member of the present invention is provided with the first and second back surface support plate portions substantially parallel to the back surface side of the front surface support plate portion. The anti-corrosion plate is connected by inserting the anti-corrosion plate into the insertion groove formed by the first and second back surface support plate portions so as to sandwich the anti-corrosion plate. And the joint member can cover the concrete surface without gaps.
[0012]
And even if the size of the anticorrosion plate is slightly different from the construction location, by inserting the anticorrosion plate deeply into the insertion groove of the joint member or by inserting it shallowly, the difference in size can be absorbed, There is no gap as the surface where the joint member and the anticorrosion plate are combined.
[0013]
In addition, since the other end side edge of the back surface support plate portion is positioned outward from the side edge of the front surface support plate portion, that is, the back surface support plate portion extends longer, When inserting the anticorrosion plate into the insertion groove formed by the plate portion for back surface and the back surface support plate portion, the end portion of the anticorrosion plate should be inserted in contact with the surface of the protruding surface of the back surface support plate portion. Thus, the anticorrosion plate can be easily inserted. There is no step between the other end side edge of the back surface support plate portion and the side edge of the front surface support plate portion. For example, in the case of a joint member with an H-shaped cross section, an anticorrosion plate is inserted into the insertion groove. In doing so, it is necessary to insert the anticorrosion plate accurately in the groove portion, which makes the insertion work difficult.
[0014]
In addition, in order to firmly fix the inserted anticorrosion plate to the joint material, it is desirable to apply an adhesive or the like to the joint surface. However, since the back support plate portion projects as described above, It is possible to easily apply an adhesive or apply an adhesive double-sided tape.
[0015]
The construction method according to the present invention includes a step of attaching the anticorrosion plate joint member to the concrete surface, a step of attaching the anticorrosion plate to the anticorrosion plate joint member, the anticorrosion plate and the anticorrosion plate joint member, and the concrete wall surface. The gist is to have a step of injecting a filling material (hereinafter sometimes referred to as a backfill material) into the formed gap.
[0016]
In this way, it is a method of assembling the prefab and installing the joint member and anticorrosion plate, and then injecting the backfilling material, so the construction method is simple, no skill is required, and the construction period can be shortened it can. In addition, the synthetic resin caulking material that is generally used as a caulking material for joints has the problem of causing poor curing and poor adhesion in a high humidity environment. In addition, since the joint member which is a molded product is used, the anticorrosion coating layer can be stably formed even in a wet environment.
[0017]
Furthermore, in the anti-corrosion board joint member which concerns on this invention, the overhang | projection part which protruded in the inner side direction of the said surface support board part was provided in the connection location of the said back support board part and the said connection part. Is preferred.
[0018]
Due to the anchoring effect of the protruding portion, the fixing with the backfill material can be ensured, and the fixing with the spacer used when the anticorrosion plate joint member is attached to the concrete surface can also be made firm.
[0019]
In addition, in the anticorrosion plate joint member according to the present invention, it is preferable that a notch extending in parallel with the left and right side edges is formed in the center of the surface support plate portion.
[0020]
For example, when the anticorrosion plate is applied to the curved concrete surface, it may be necessary to bend the anticorrosion plate joint member. If there is a notch as described above, the anticorrosion plate joint member can be easily bent. It is also possible to bend at the above-mentioned notch portion so as to have an L-shaped cross section and to construct at 90 ° corners.
[0021]
Furthermore, the anticorrosion plate joint member is preferably made of a thermoplastic resin, and can be easily bent by heating.
[0022]
Moreover, in the anti-corrosion board joint member which concerns on this invention, it is preferable that the side edge of the said surface support board part is thinning circularly toward the said back support board part direction.
[0023]
As a result, there is no abrupt step 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 gently.
[0024]
In addition, the anticorrosion plate joint member according to the present invention is preferably such that a hole for engaging the head portion of the anchor bolt is formed on the back surface support plate portion.
[0025]
When the joint member is attached to the concrete wall surface, it is conceivable that the joint member is attached using a concrete bolt. At this time, if the concrete bolt head is engaged with the hole so that the head does not protrude, the concrete Bolts will be covered with anti-corrosion plates etc. and will not be exposed. Therefore, even if the concrete bolt is made of metal, there is no fear of corrosion.
[0026]
DETAILED DESCRIPTION OF THE INVENTION
1A and 1B are views showing a corrosion-protecting plate joint member according to an embodiment of the present invention, in which FIG. 1A is a perspective view of a front surface thereof, and FIG. FIG. 2 is a cross-sectional view taken along line AA shown in FIG.
[0027]
The anticorrosion plate joint member 10 is obtained by connecting two back surface support plate portions 12 and 13 to the front surface support plate portion 11 via connecting portions 14 and 15, and the connection position thereof is the above surface support plate. The back surface of the portion 11 is slightly inside the left and right edge portions 11 _L and 11 _R , and one end of the back surface support plate portions 12 and 13 is connected to the back surface support plate portions 12 and 13 via the connecting portions 14 and 15. Yes. The front surface support plate portion 11 and the back surface support plate portions 12 and 13 are positioned in parallel, and an insertion groove (gap) is provided between the front surface support plate portion 11 and the back surface support plate portions 12 and 13. 22 and 23 are formed. The other ends 12e and 13e of the back surface support plate portions 12 and 13 are positioned outward from the positions of the edges 11 _R and 11 _L of the front surface support plate portion 11, and the back surface support plate portions 12 and 13 are stretched. It has a shape that protrudes (overhang portion 24: the portion from the position corresponding to the edge portions 11 _R and 11 _L to the other ends 12e and 13e).
[0028]
In addition, one inner end of the right back support plate 12 and one inner end of the left back support plate 13 face each other, and an inner space 20 is formed by these and the front support plate 11. ing. And the protruding parts 16 and 17 projected inwardly are provided in the connection location of the said back surface support board parts 12 and 13 and the connection parts 14 and 15. As shown in FIG.
[0029]
A plurality of holes 19 are provided in the overhanging portions 24 of the back surface supporting plate portions 12 and 13. The hole portion 19 has a shape in which the front side of the back surface supporting plate portions 12 and 13 is widened in a taper shape, and is configured to be just engaged with a concrete bolt head portion.
[0030]
The surface support plate 11 has a thick central portion and is thinned toward the side edges 11 _R and 11 _L , and the side edges 11 _R and 11 _L are thin in an arc shape. Further, notches 18a and 18b extending in parallel with the edges 11 _R and 11 _L are provided on the front and back surfaces at the center of the surface support plate portion 11.
[0031]
The joint member 10 is made of vinyl chloride and can be easily bent by heating.
[0032]
Next, the method of construction using the joint member 10 of this embodiment will be described by taking the case of construction on existing cylindrical concrete as an example. 3 to 5 are partially cutaway perspective views for explaining the construction process.
[0033]
First, the deteriorated portion of the concrete surface 30 is removed (FIG. 3), and then the joint member 10 for vertical joints is installed and fixed to the concrete wall 30 using the concrete anchor bolts 29. At this time, the spacer 31 made of hard swonge is fitted into the inner space 20 of the joint member 10 in some places (discontinuously), and the joint member 10 is separated from the surface of the concrete wall 30 at a desired interval, thereby forming a gap (gap) 50. (See FIG. 6). In addition, it is good to use the thing made from different thickness according to the height difference (unevenness) of the concrete wall 30 surface as said hard-sbonge spacer, and some unevenness | corrugations on the concrete wall 30 surface are absorbed by shrinkage | contraction of the said spacer. be able to. The spacer 31 may be fitted into the inner space 20 of the joint member 10 continuously.
[0034]
Next, the anticorrosion plate 40 is inserted into the insertion grooves 22 and 23 of the joint member 10 and assembled. At this time, an adhesive sealing agent (for example, a silicon-based sealing agent or an epoxy-based sealing agent) 41 is applied or filled on the inner surfaces of the insertion grooves 22 and 23.
[0035]
Then, while inserting the joint member 10 for the horizontal joint into the anti-corrosion plate 40, the spacer is fitted into the joint member inner space 20 in the same manner as described above, and installed and fixed to the concrete wall 30 using the concrete bolt 29 (FIG. 4). .
[0036]
The installation of the joint member 10 for the vertical joint, the insertion of the anticorrosion plate 40, and the installation of the joint member 10 for the horizontal joint are repeated and stacked on the circumference to install the anticorrosion plate 40 in a desired area.
[0037]
Thereafter, a liquid backfilling material (filling material: for example, cementitious sulfate-resistant grout material) 51 is injected into the gap 50 formed between the joint member 10 and the anticorrosion plate 40 and the surface of the concrete wall 30 and solidified ( FIG. 5). In addition to the above, the back-filling materials include inorganic materials such as cement-based grout materials, organic materials such as epoxy resin-based grout materials, and organic-inorganic composite materials such as polymer cement-based grout materials. It is good to use.
[0038]
The anticorrosion board 40 is constructed on the surface of the concrete wall 30 as described above.
[0039]
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 is arcuate. The same components as those in FIGS. 1 to 5 are denoted by the same reference numerals to avoid redundant description.
[0040]
As shown in the figure, the anticorrosion plate 40 is inserted into the insertion grooves 22 and 23 of the joint member 10, but when inserting, the insertion side end of the anticorrosion plate 40 is applied to the overhanging portion 24 of the back surface support plate portions 12 and 13. However, if it is inserted into the insertion grooves 22 and 23, the anticorrosion plate 40 can be easily inserted into the insertion grooves 22 and 23 of the joint member 10.
[0041]
Further, since the anticorrosion plate 40 is firmly fixed to the joint member 10 by the sealing agent 41 applied (or filled) in the insertion grooves 22 and 23, the anticorrosion plate 40 is injected before the backfill material 51 is injected. Accidents that come off can be prevented. Further, since the sealing agent 41 serves to fill the gap between the insertion grooves 22 and 23 and the anticorrosion plate 40, the backfill material 51 does not leak out, and hydrogen sulfide gas or the like does not leak on the back side (concrete side). Inflow can be prevented. Since the backfill material 51 is made of the same material as concrete, it is easily corroded by hydrogen sulfide gas or the like, like the concrete wall 30.
[0042]
As the anticorrosion board 40, the one provided with the synthetic resin layer 42 on one side of the three-dimensional knitted fabric 43 is preferable, as shown in the aforementioned utility model registration number 2594065. Insertion into the joint member 10 is facilitated by cutting out the three-dimensional knitted fabric 43 at the tip of the insertion portion of the anticorrosion plate 40 in advance.
[0043]
Moreover, since the protruding parts 16 and 17 projecting toward the inner space 20 of the joint member 10 exhibit an anchor effect with respect to the solidified backfill material 51, the joint member 10 is not easily peeled off. In addition, since the protruding portions 16 and 17 hold the spacer fitted in the inner space 20, the spacer does not easily come off. The anticorrosion plate 40 is fixed firmly by the backfill material 51 entering the three-dimensional knitted fabric as described above. Moreover, since the concrete wall 30 and the backfill material 51 are the same material, they are familiar and there is little possibility of peeling.
[0044]
As described above, the hole 19 for the concrete bolt 29 of the joint member 10 is provided in the overhanging portion 24 of the back surface supporting plate portions 12 and 13, and the hole 19 has a shape in which the head of the concrete bolt 29 fits. However, the head of the concrete bolt 29 does not come out on the front side, and can be covered with the anticorrosion plate 40. Therefore, since the concrete bolt 29 is not exposed to corrosive liquid or gas, a material that is susceptible to corrosion by sulfuric acid or the like, such as iron, may be used, and any material may be used.
[0045]
Further, since the side edges 11 _L and 11 _R of the surface support plate portion 11 of the joint member 10 have an arc shape, the surface of the anticorrosion plate 40 and the surface of the surface support plate portion 11 are smoothly continued.
[0046]
In addition, for example, as shown in FIG. 4, in order to arrange the joint member 10 in the horizontal joint portion, the joint member 10 bent in an arc shape in the longitudinal direction is necessary, but the joint member 10 is made of vinyl chloride. Therefore, it can be easily bent by heating, so that the shape can be easily corrected even at the construction site. Furthermore, in the joint member 10 provided with the notches 18a and 18b, the bending and bending in the width direction are easier. The notch 18a can be used as a guide for the position when the joint member is installed.
[0047]
As described above, even when the concrete surface having various shapes is combined with the deformable joint member 10 and the anticorrosion plate, the entire concrete surface can be covered, and the anticorrosion plate 40 and the anticorrosion plate 40 adjacent to each other can be covered. Since the gap is connected by the joint member 10 and no joint gap is formed on the construction surface, corrosive liquid or gas does not reach the concrete. In addition, the prefabricated construction method can shorten the construction period and can be constructed even in a highly humid environment, so that the construction environment can be selected.
[0048]
As described above, the joint member according to the present invention and the construction method using the joint member have been specifically described with reference to the drawings illustrating examples. However, the present invention is not limited to the illustrated examples, and It is also possible to carry out the invention with appropriate modifications within a range that can be adapted to the gist, and they are all included in the technical scope of the present invention.
[0049]
For example, the material of the joint member is not limited to the above-mentioned vinyl chloride, but is made of amorphous plastic such as polystyrene or methacrylic resin, crystalline plastic such as polystyrene, polypropylene, polyacetal, saturated polyester, fluororesin, polyphenylene sulfide, polyphenylene oxide, poly Thermoplastic resins such as engineering plastics such as ether ether ketone may be used. If bending is not required, a thermosetting resin may be used.
[0050]
Moreover, although the small thing was shown as the protruding parts 16 and 17 in the said embodiment, it may be overhanging long and the protruding parts 16 and 17 of a bowl shape may be sufficient.
[0051]
【The invention's effect】
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 creating a gap in the joint portion where the anticorrosion plate and the anticorrosion plate are adjacent to each other. It can block out any substances. Moreover, the construction is simple and the construction period can be shortened.
[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.
3 is a partially cutaway perspective view for explaining a process of construction using the joint member of the embodiment shown in FIG.
FIG. 4 is a partially cutaway perspective view for explaining a process of construction using the joint member of the embodiment shown in FIG.
5 is a partially cutaway perspective view for explaining a process of construction using the joint member of the embodiment shown in FIG. 1; FIG.
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 Spaces 22 and 23 Insertion groove 24 Overhang portion 29 Concrete bolt 30 Concrete wall 40 Anticorrosion plate 41 Sealing agent 42 Synthetic resin layer 43 Solid knit 50 Gap 51 Backfilling material

Claims (7)

A joint member connecting two or more anticorrosion plates,
Having one front support plate and two back support plates,
These plate portions are the back surface of the front surface support plate portion, the inner ends of the left and right side edges, one end of the back surface support plate portion is connected via a connecting portion, respectively,
The surface support plate portion and the back surface support plate portion are substantially parallel, and a gap formed by the surface support plate portion and the back surface support plate portion is used for inserting the anticorrosion plate, and the surface The anticorrosion board joint member, wherein the other end side edge of the back surface supporting plate part is positioned outward from the side edge of the supporting board part. The anticorrosion board joint member according to claim 1, wherein a protruding portion that protrudes inward of the front surface support plate portion is provided at a connection portion between the back surface support plate portion and the connecting portion. The anticorrosion board joint member according to claim 1 or 2, wherein a notch extending in parallel with the left and right side edges is formed in the center of the surface support plate part. The anticorrosion board joint member according to any one of claims 1 to 3, wherein a side edge of the front surface support plate portion is gradually thinner toward the back surface support plate portion. The anticorrosion board joint member according to any one of claims 1 to 4, wherein a hole for engaging the head of an anchor bolt is formed in the back support board. The said anti-corrosion board joint member is a product made from a thermoplastic resin, The anti-corrosion board joint member in any one of Claims 1-5. The step of attaching the anticorrosion plate joint member according to any one of claims 1 to 6 to a concrete wall surface;
Attaching the anti-corrosion plate to the anti-corrosion plate joint member;
A construction method comprising a step of injecting a filling material into a gap formed by the anticorrosion plate, the anticorrosion plate joint member, and the concrete surface.

Images