JP3060201B2 - Corrosion resistant construction method for water tanks etc. with corrosion resistant panels - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a corrosion-resistant treatment (including a corrosion prevention treatment, hereinafter the same) of a concrete structure forming a treatment water tank such as a sewage treatment plant or a sewage treatment plant, or a plating tank or an ultrapure tank. In particular, the present invention relates to a corrosion-resistant construction method performed in a corrosion-resistant treatment using a corrosion-resistant panel. More specifically, the present invention relates to an improved construction method of a joint portion of a corrosion-resistant panel in a corrosion-resistant construction of a side wall portion (a rising wall portion) of a water tank.

[0002]

2. Description of the Related Art When a water tank such as a sewage treatment plant is formed of a concrete structure, in order to protect the concrete structure from acid or alkali components and other concrete corrosion components in the water and secure and maintain a useful life, Corrosion resistance treatment of the concrete structure surface is indispensable.

[0003] Conventionally, corrosion-resistant construction methods generally include a method of applying or spraying a corrosion-resistant material on a concrete surface after constructing a concrete structure, or a method of attaching a corrosion-resistant sheet. However, the above-mentioned corrosion-resistant construction method has a prolonged construction period, lacks long-term reliability and effectiveness of corrosion-resistant treatment, labor management to secure workers, quality control and quality control due to differences in skills of workers. There are also problems with warranty.

Japanese Patent Application Laid-Open No. 8-68103 discloses a corrosion resistant construction method using a corrosion resistant panel as means for solving the above-mentioned problem. Specifically, as shown in FIGS. 8 and 9, the corrosion-resistant panel 2 is disposed as a corrosion-resistant construction side of the concrete skeleton 1, and the other side of the corrosion-resistant panel 4 (such as a normal plywood or a corrosion-resistant panel). Is also possible) and is assembled using the separator 5 and the foam tie 6.
The foam tie 6 is connected to the pipe rim 16 (or thick end). One end of the separator 5 is screwed to the foam tie 6 via a cone 17, and the other end is screwed to the foam tie 6 via a fastening cone 9. In the figure, reference numeral 7 denotes an anchor piece having a shape and a structure having a large bonding force with concrete. This is an injection-molded product such as an ABS resin, which has a shape like a tertel shaved head having a thin neck under a spherical head, and is provided in a substantially uniform arrangement on the entire surface of the corrosion resistant panel 2 on the concrete casting side. Have been. Symbol 15
Is a pier to stiffen the corrosion resistant panel. The corrosion-resistant panel 2 has a thin glass mat attached to the inner and outer surfaces of a core material 2a having necessary strength, thickness, and corrosion resistance as a concrete driving dam, as shown in an enlarged view of FIG. 1, for example. The corrosion resistant linings 2b and 2c are formed by impregnating the glass mat with a corrosion resistant synthetic resin.

When the concrete body 1 is poured into the formwork device assembled as shown in FIG. 8 and the concrete develops its strength, when the formwork device is disassembled, as shown in FIG. The provided corrosion resistant panel 2 is driven into the corrosion resistant construction surface (right side surface) of the concrete skeleton 1. As a means for further firmly determining the driving state of the panel, a countersunk head 12 made of a corrosion-resistant material and having a sufficiently large pressure contact area is inserted into the screw hole of the tightening cone 9 from which the foam tie 6 has been removed. , And the corrosion-resistant panel 2 is tightened and fixed. The corrosion-resistant linings 2a and 2b of the corrosion-resistant panel 2 exhibit the corrosion-resistant function of the concrete surface.

The corrosion-resistant panel 2 has a size similar to that of a general weir board, and is used in a configuration in which a pier 15 is attached to a peripheral portion thereof and stiffened (see FIG. 4). Pier 1
5 is usually fixed to the corrosion-resistant panel 2 by hitting it with a nail 3 (see FIG. 5). In FIG. 4, illustration of the middle crosspiece is omitted. When assembling the corrosion-resistant panel 2 having the above-described structure into a formwork device, particularly, joint portions are assembled as shown in FIG. That is, the two adjacent corrosion-resistant panels 2 and 2 butt each other on the crosspieces 15 and 15, and the two crosspieces 15 and 1 are connected to each other.
The nails 8 are inserted diagonally and symmetrically from both sides so as to increase the resistance through the nail 8 having a length sufficiently reaching 5.
After that, when the concrete 1 is cast and cured, the formwork apparatus is dismantled, and as shown in FIG. 6, a large number of nails 3 at the joints of the corrosion-resistant panel 2 which is driven into the concrete surface are traces of the pier 15 being pulled off. It will be in a protruding state. Therefore, in the final corrosion-resistant construction of the joint portion, as shown in FIG. 7, the protruding portion of the nail 3 is cut off one by one by a cutting machine.
Thereafter, a thin band-shaped glass mat 10 is attached along the joints, and the glass mat 10 is impregnated with a corrosion-resistant synthetic resin 11.

[0007]

When the corrosion-resistant construction method using the corrosion-resistant panel is carried out as described above, carpentry work for attaching and fixing a pier to the corrosion-resistant panel by nailing, and the corrosion-resistant panel when assembling the formwork apparatus. Carpentry (see FIG. 5) for joining the piers by nailing is indispensable. It is important to secure carpenters, and the carpentry is very troublesome and time-consuming.

Further, when the formwork apparatus is disassembled, a large number of nails 3 fixing the crosspiece are exposed at the trace where the crosspiece has been removed (FIG. 6). It is indispensable to cut off all exposed nails as described above. So you have to prepare a cutting machine,
The cutting work is troublesome and troublesome due to the large number of nails. In addition, it is dangerous because it involves working at heights.

Moreover, the dismantled pier 15 is severely damaged by being hit with a large number of nails 3 and 8, and it is extremely difficult to convert the pier 15 to be uneconomical. Therefore,
An object of the present invention is to provide a nail-less construction method that does not use any nails for assembling a formwork apparatus, particularly for assembling a corrosion-resistant panel, and thus has no carpentry work and does not require a carpenter specially. It is to provide.

A second object of the present invention is to assemble the formwork apparatus, especially assembling the joints between the corrosion-resistant panels, as an easy bolting operation for anybody, and the pier can be repeatedly used and converted any number of times. It is an object of the present invention to provide a corrosion-resistant construction method which is possible, saves resources and is economical. Still another object of the present invention is to provide a corrosion-resistant construction method that can expect an effect of preventing cracks in a concrete structure.

[0011]

Means for Solving the Problems As means for solving the above-mentioned problems, the invention described in claim 1 is to dispose a corrosion-resistant panel as a dam plate on a corrosion-resistant construction surface such as a water tank made of a concrete structure. In the corrosion-resistant construction method in which the corrosion-resistant panel is driven into the surface of the concrete skeleton, the joint portion of the corrosion-resistant panel has a groove in the longitudinal direction of the central portion, and the cross section is formed on both sides of the hat-shaped steel-like connecting member. The joining edges of adjacent corrosion-resistant panels are abutted along the flat plate portion, the opening of the groove is arranged toward the concrete casting side, a pier is applied to the opposite surface, and a connecting member is connected from the surface side of the pier. Assemble the formwork device by screwing the tips of the bolts passed through the respective bolt holes into the nuts mounted in the concave grooves or into the screw holes formed directly on the groove walls, and placing concrete. After curing to express the strength,
Loosen and remove the bolts, remove the pier, disassemble the formwork device, paste a thin strip of glass mat along the joint centered on the back side of the groove of the connecting material, and corrosion resistant to the same glass mat It is characterized in that it is impregnated with a synthetic resin having a corrosion resistance treatment.

The corrosion-resistant panel according to the first aspect of the present invention is characterized in that a thin glass mat is attached to the inner and outer surfaces of a core material having strength, thickness and corrosion resistance required for a concrete damping board.
The glass mat is impregnated with a corrosion-resistant synthetic resin to form a corrosion-resistant lining.The joining material is a relatively hard synthetic resin uniform-section material, and the outer height of the concave groove is the corrosion-resistant material. The thickness of the panel is equal to or less than the thickness of the panel, and the crosspiece is configured to have a width substantially equal to the entire width dimension of the connecting member and a height suitable for use of the trunk or end of the formwork device. I do.

[0013] The corrosion-resistant panel according to the first and second aspects is provided with a plurality of anchor pieces each having a shape and structure having a large bonding force with concrete in a substantially uniform arrangement over the entire surface on the concrete casting side. Is characterized by a combination of a wide pier having a width equal to the entire width of the connecting member, and a tall pier that satisfies a height suitable for use of the rim or end of the formwork device.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION As shown in FIG. 8, in the construction of a water tank or the like using a concrete frame 1, the present invention particularly relates to a concrete frame which is a side wall portion of a water tank or a rising wall portion similar thereto. A corrosion-resistant construction method is performed in which a corrosion-resistant panel 2 is disposed as a dam on the surface of the corrosion-resistant construction 1 and the corrosion-resistant panel 2 is driven into the surface of the concrete structure 1 as shown in FIG. The basic contents of the corrosion-resistant construction method using the corrosion-resistant panel 2 conform to the invention described in JP-A-8-68103.

The main part of the present invention is the above corrosion-resistant panels 2, 2
It is in the assembly structure of the joints. As shown in FIGS. 1 to 3, the connecting member 1 is formed with a concave groove 13 in the longitudinal direction of the central portion and thus has a hat-shaped steel cross section.
The joining edges of the adjacent corrosion-resistant panels 2, 2 are abutted along the flat plate portions 14a, 14a on both sides in FIG. In this case, the opening of the concave groove 13 is arranged toward the concrete casting side. The crosspieces 19 and 20 are applied to the opposite surfaces, and the ends of the bolts 21 passed through the bolt holes 19a and 20a from the surface side of the crosspieces 19 and 20 toward the connecting member 14 are inserted into the concave grooves 13. The screw form device is assembled to the nut 22 attached to the nut. However, a bolt hole provided in the bottom wall portion of the concave groove is formed in a screw hole, and a bolt 21 is formed in the screw hole.
Is also implemented.

As described above, the corrosion-resistant panel 2 is formed by attaching a thin glass mat to the inner and outer surfaces of a core material 2a having the strength, thickness and corrosion resistance required for a concrete damping plate. This is a configuration in which the corrosion-resistant linings 2b and 2c are formed by impregnation with a corrosion-resistant synthetic resin. As shown in FIGS. 8 and 9, the corrosion-resistant panel 2 includes a plurality of anchor pieces 7 arranged substantially uniformly over the entire surface on the concrete casting side. The anchor piece 7 has a thin neck under the spherical head so as to have a large bonding force with the concrete 1, has a shape and structure like a so-called Tertel shaven, and is injection-molded with a corrosion-resistant ABS resin or the like. .

The connecting member 14 is a so-called die having a uniform cross section formed by extruding an ABS resin or other relatively hard synthetic resin. The entire width up to the outer edge of the flat portion 14a on both sides is about 60 mm. The opening width is about 15 mm, and the outer height H (see FIG. 1) of the groove 13 is less than the thickness of the corrosion-resistant panel 2 (typically about 12 mm). The two piers 19 and 20 can be replaced by one large pier as exemplified by the dotted line in FIG. 1, but since this requires heavy and large timber and is uneconomical, It is implemented by a combination of the crosspieces 19 and 20. The inner pier 19 is a wide pier having a width approximately equal to the entire width of the connecting member 14, and has a corrosion-resistant panel between the flat member 14a of the connecting member 14 with a wide surface pressure when fastened with the bolt 21. We expect the function of pinching and fixing 14. The outer pier 20 is a tall pier that is expected to have a function of securing a height (usually 60 mm) suitable for the use of the rim or edge of the formwork device as an intrinsic function of the pier. In the front half of the bolt hole 20a of the crosspiece 20, a recess 20b having a width and a depth for sinking the head of the bolt 21 is formed in series.

The concrete 1 is cast into a formwork device assembled in a structure as shown in FIG. After curing the cast concrete 1 until its strength is developed, the bolts 21 are loosened and removed from the nuts 22.
9 and 20 are removed and the formwork device is dismantled. Thereafter, a thin strip-shaped glass mat 10 is attached along the joint centered on the back side of the groove 13 of the connecting member 14 which has been driven into the concrete surface together with the corrosion-resistant panel 2. Further, the glass mat is impregnated with a corrosion-resistant synthetic resin 11 to perform a corrosion-resistant treatment, thereby completing the entire process of the corrosion-resistant construction.

Therefore, since each of the crosspieces 19 and 20 collected by the disassembly is scarcely damaged, it can be diverted to another place. Similarly, the recovered bolts 21 can be diverted. Assembling or disassembly of the joints of the formwork device can be performed only by operating the bolt 21, and there is no particular need for a carpenter. A connecting member 14 driven into the concrete surface together with the corrosion-resistant panel 2
The concave groove 13 functions as a buffer when the concrete shrinks during drying and shrinkage, thereby exhibiting the effect of preventing concrete from cracking.

[0020]

[Effect of the present invention] The corrosion resistant construction method according to the present invention
This is a nail-less construction method that does not use any nails for assembling the formwork apparatus, especially for assembling the corrosion-resistant panel. Therefore, there is no particular carpentry work and no special carpenter is required, so that labor management is easy. The corrosion-resistant construction method of the present invention can be used to easily assemble the formwork device, especially the joint joint between the corrosion-resistant panels, as an easy bolting work, and is expected to have excellent workability, work efficiency, and shorten the construction period. Yes, and quality control and quality assurance are easy. Moreover, the pier can be used and diverted repeatedly as many times as possible, resulting in great resource saving effects and economic efficiency.

The corrosion-resistant construction method of the present invention can also be expected to have an effect of preventing cracks in a concrete structure.

[Brief description of the drawings]

FIG. 1 is a horizontal sectional view showing a mold assembly diagram for corrosion-resistant construction according to the present invention.

FIG. 2 is an exploded perspective view showing a mold structure for corrosion-resistant construction according to the present invention.

FIG. 3 is a horizontal sectional view showing a completed state of the corrosion resistant construction.

FIG. 4 is a perspective view of a corrosion resistant panel used for conventional corrosion resistant construction.

FIG. 5 is a horizontal cross-sectional view showing a form-assembly state of a conventional corrosion-resistant construction.

FIG. 6 is a sectional view showing a state in which the crosspiece is dismantled.

FIG. 7 is a horizontal sectional view showing a completed state of a conventional corrosion resistant construction.

FIG. 8 is a sectional view showing an assembled state of the formwork apparatus.

FIG. 9 is a cross-sectional view showing a driving state of the corrosion-resistant panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete building body 2 Corrosion-resistant panel 13 Depression groove 14 Connecting material 14a Flat plate part 19 Crosspiece (wide pier) 20 Crosspiece (tall pier) 19a Bolt hole 20a Bolt hole 21 Bolt 22 Nut 10 Glass mat 11 Synthetic resin 7 Anchor piece

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-8-68103 (JP, A) (58) Fields investigated (Int. Cl. ⁷ , DB name) E03F 5/18 E04H 7/18 E04B 2 / 86

Claims (3)

(57) [Claims] 1. A corrosion resistant construction method in which a corrosion resistant panel is disposed as a dam on a corrosion resistant construction surface such as a water tank of a concrete frame, and the corrosion resistant panel is driven into the surface of the concrete frame. Abuts the joint edges of adjacent corrosion-resistant panels along the flat plate portions on both sides of the hat-shaped steel-like connecting member having a groove formed in the longitudinal direction of the central portion, and concretely cuts the opening of the groove. The formwork is screwed into the nut of the recessed groove by arranging the pier on the opposite surface, applying the pier to the opposite side, and passing the tips of the bolts passed through the respective bolt holes from the surface side of the pier to the joining material. After assembling the device, placing concrete and curing until it develops strength, loosen and remove the bolts, remove the pier, disassemble the formwork device, and back the groove of the connecting material. Attaching a thin strip of glass mat along the joint around the center, impregnating the glass mat with a corrosion-resistant synthetic resin, and performing a corrosion-resistant treatment. Method. 2. A corrosion-resistant panel is prepared by attaching a thin glass mat to the inner and outer surfaces of a core material having the strength, thickness and corrosion resistance required for a concrete damping plate, and impregnating the glass mat with a corrosion-resistant synthetic resin. The corrosion-resistant lining is formed, the connecting material is a relatively hard synthetic resin uniform sectional shape material, the height of the outer periphery of the concave groove is less than the thickness of the corrosion-resistant panel, and the crosspiece is the connecting material. 2. The corrosion-resistant panel according to claim 1, wherein the width is substantially the same as the entire width of the mold, and the height is adapted to the use of the body edge or the end of the formwork device. Construction method. 3. The corrosion-resistant panel is provided with a plurality of anchor pieces having a shape and a structure having a large bonding force with concrete in a substantially uniform arrangement on the entire surface on the concrete casting side, and the crosspiece has a width equivalent to the entire width dimension of the connecting member. 3. Corrosion-resistant panel according to claim 1 or 2, characterized in that it is a combination of a wide girder of size and a taller girder filling a height adapted to the use of the rim or the end of the formwork device. Corrosion-resistant construction method for water tanks.