JPH0868103A - Corrosion-resistant execution method for water tank, etc., with concrete skeleton, corrosion-resistant panel, and formwork device - Google Patents

Abstract

PURPOSE: To sharply shorten the construction period and reduce the cost due to the averaging and composition of execution and labor by arranging a corrosion-resistant panel for a formwork on the corrosion-resistant execution face side of a concrete skeleton, assembling the formwork, and placing concrete. CONSTITUTION: A corrosion-resistant panel 2 is arranged as a formwork on the corrosion-resistant execution face side of a concrete skeleton, and it is assembled together with a formwork 4 on the other side, a separator 5, and a Foam Tie 6. The Foam Tie 6 and a screw shaft 10 are removed after concrete is placed, and a cone 9 is kept connected to a screw section 5a and buried in the skeleton together with the panel 2. A flat countersunk head screw is screwed and fastened to a joint nut 11 to press a presser seat 12 to the surface of the panel 2. The construction period is sharply shortened, the number of workers and formwork consumption is reduced, and the construction cost can be sharply reduced due to the averaging and composition of execution.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a water tank using a concrete structure, for example, a treatment water tank for a sewage treatment plant, a sewage treatment plant, a plating tank, an ultrapure water tank, or the like. (Hereinafter, simply referred to as "corrosion resistant"), the present invention relates to a corrosion resistant construction method and a corrosion resistant panel and formwork apparatus used in the method.

[0002]

2. Description of the Related Art When a water tank at a sewage treatment plant, a sewage treatment plant, etc. is formed by a concrete structure, the concrete structure is protected from acid or alkali components in water and other concrete corrosion components, and its service life is secured and maintained. In order to
Corrosion-resistant treatment of the surface of the concrete structure is essential.

Conventionally, the anticorrosion treatment of the concrete structure is
After the construction of the skeleton, a corrosion resistant material is applied or sprayed on the surface, or a corrosion resistant sheet is attached to perform construction.

[0004]

The above-mentioned conventional corrosion-resistant construction method has to be carried out after curing the concrete of the concrete structure and dismantling the formwork. Therefore, the construction period will be extended by the time required for corrosion-resistant construction and the curing time, and as a result, concrete work and corrosion-resistant construction will be separate steps (separate construction), resulting in higher labor costs and construction costs. There is. There is no denying the consumption of concrete formwork (particularly the veneer plate as a formwork wears out after a couple of uses). Corrosion-resistant treatment by coating or spraying has poor reliability and effectiveness for long-term use. On the other hand, the method of pasting is based on the method of pasting (bonding) the rough surface of the concrete surface.
It is unsuitable for construction, and the alkaline structure is also harmful to adhesion. Moreover, the corrosion-resistant sheet pushed by the groundwater pressure of the surrounding ground that has penetrated into the concrete structure, or the pressure that water in the concrete evaporates, may swell and eventually come off, or harmful water may penetrate and penetrate. .

In addition, labor management to secure workers for corrosion-resistant construction is also difficult, and the conventional corrosion-resistant construction method that depends on the skill and skill of the worker is used by craftsmen. In some cases, the original resin performance may not be exhibited due to differences in individual abilities and inconsistencies in on-site atmosphere conditions, which ultimately leads to variations and differences in construction quality.

[0006] Therefore, the first object of the present invention is to perform the construction by driving into the surface of the concrete skeleton, which also serves as the template of the formwork for constructing the concrete skeleton, so that the corrosion-resistant construction is performed as a part of the concrete construction of the skeleton. About 90% of the corrosion-resistant construction was completed at the same time as the completion of the concrete structure (disassembly of the formwork), and the leveling of construction and labor, and a significant reduction in the construction period due to compounding, and reduction in the number of workers, It is an object of the present invention to provide a corrosion-resistant construction method capable of reducing the plate consumption and, consequently, the construction cost.

The second object of the present invention is to use a corrosion-resistant panel manufactured in a factory under strict quality control and satisfying sufficient resin curing conditions, and therefore is not adversely affected by the variation in the on-site construction technique. It is an object of the present invention to provide an anticorrosion construction method capable of obtaining an average construction quality on site, having a large anticorrosion effect, long-term stability, and high reliability.

The second object of the present invention is to make the corrosion-resistant panel sufficiently firm and stable for a long period of time against the effects of various external forces such as the groundwater pressure that has penetrated into the concrete structure, the pressure at which water in the concrete has evaporated, and other various external forces. It is an object of the present invention to provide a corrosion-resistant construction method in which the construction is carried out in a highly reliable driving state and the effectiveness of the corrosion-resistant treatment is shown. A further object of the invention is
It is manufactured in a factory under sufficient quality control and is suitable for being used as a template for the construction frame of a concrete structure.It can be surely and firmly driven into the surface of the concrete structure, and Another object of the present invention is to provide a corrosion-resistant panel which has an effect of reinforcing bending strength, and has a large corrosion-resistant effect and long-term stability and high reliability.

Another object of the present invention is to provide a mold apparatus having a structure in which the corrosion-resistant panel having the above-mentioned structure is also used as a template, the same corrosion-resistant panel is driven into the surface of a concrete structure, and the driving state can be strengthened and determined. It is to be.

[0010]

[Means for Solving the Problems] As a means for solving the above-mentioned problems of the prior art, a corrosion-resistant construction method for a water tank or the like using a concrete structure according to the invention of claim 1 is to construct a water tank or the like using a concrete structure. At this time, a corrosion-resistant panel 2 is arranged as a mold plate on the corrosion-resistant construction surface side of the concrete structure 1 to assemble a mold 3, and concrete 1a is placed in the mold, and after the mold is dismantled, the corrosion resistance is maintained. It is characterized in that the panel 2 is driven into the surface of the concrete structure 1.

According to the second aspect of the present invention, there is provided a corrosion-resistant construction method for a water tank or the like using the concrete structure in the construction of the water tank or the like using the concrete structure.
The corrosion resistant panel 2 is arranged as a mold plate on the corrosion resistant construction surface side, and the mold frame 3 is assembled using the mold plate 4 on the other side, the separator 5 and the foam tie 6, and the concrete 1 in the mold frame.
It is characterized in that the corrosion resistant panel 2 is driven into the surface of the concrete skeleton 1 after a is cast and the mold is dismantled.

The corrosion-resistant panel 2 in the corrosion-resistant construction method according to claim 1 or 2 is a mat in which a thin glass mat is attached to the inner and outer surfaces of a core material 2a having strength and thickness required for a concrete casting template and corrosion resistance. It is characterized in that a corrosion-resistant lining is formed by impregnating with a corrosion-resistant synthetic resin. The corrosion-resistant panel 2 in the corrosion-resistant construction method according to claim 1, 2 or 3 is provided with a plurality of anchor pieces 7 each having a shape and a structure that are highly evenly arranged and have a high bondability with concrete over the entire surface of the concrete pouring side. It is also characterized by being present.

In the corrosion-resistant construction method according to claim 1 or 2,
The joint 8 between the corrosion-resistant panels 2 and 2 which has been driven into the surface of the concrete structure 1 has a thin strip-shaped glass mat 2d along the joint after the dismantling of the formwork, and a corrosion-resistant synthetic resin is applied to the mat. 2e is impregnated for corrosion resistance. According to the corrosion-resistant construction method of claim 2, when assembling the mold 3, the tightening cone 9 for supporting the corrosion-resistant panel 2 on the separator 5 is made of a corrosion-resistant material, and the threaded portion 5a of the separator 5 and the screw shaft 1 for the form tie are formed.
It is assumed that the structure is provided with a joint nut 11 capable of screwing 0 in series. When the concrete 1a is placed in the assembled formwork and the formwork is disassembled after curing until the concrete develops strength, the form tie 6 is removed, and the screw shaft 10 for the form tie is joined to the tightening cone 9 joint. After being removed from the nut 11, a presser seat 12 made of an anticorrosive material and having a sufficiently wide pressure contact area is provided at each tightening cone 9 position with a countersunk screw 13 screwed into the joint nut 11 of the tightening cone 9. The panel 2 is tightened to the surface of the panel 2, and the head of the dish screw 13 is subjected to anticorrosion treatment to remove the anticorrosion panel 2 from the concrete structure 1
It is characterized in that it is set in a driven state on the surface of.

In the corrosion-resistant panel 2 of claim 7, thin glass mats are attached to the inner and outer surfaces of a core material 2a having strength, thickness and corrosion resistance required for a concrete casting template, and the mats are made of a corrosion-resistant synthetic resin. Corrosion resistant lining 2b, 2
c is formed, and further, a plurality of anchor pieces 7 having a shape and a structure that are highly evenly arranged and have a high bondability with concrete are provided on the entire surface of the concrete pouring side.

In the corrosion-resistant panel 2 of claim 7, the core material 2a is a low foamed sheet such as an epoxy resin, the corrosion-resistant synthetic resin is a thermosetting resin such as an epoxy resin or a vinyl ester resin, and the anchor. The piece 7 is a molded product made of a corrosion-resistant ABS resin or the like, and is characterized by being adhered to the surface of the panel. The formwork apparatus of claim 9 arranges a corrosion-resistant panel 2 as a mold plate on the corrosion-resistant construction surface side of the concrete skeleton 1, and uses a separator 5 and a foam tie 6 to form a mold 3 on the other side. It is assembled. Particularly, the tightening cone 9 for supporting the corrosion resistant panel 2 on the separator 5 is formed of a corrosion resistant material, and is provided with a joint nut 11 capable of screwing the threaded portion 5a of the separator 5 and the screw shaft 10 for foam ties in series. It has a different structure. Even when the mold 3 is dismantled, the tightening cone 9 is buried in the concrete 1a together with the corrosion-resistant panel 2 while being screwed to the separator 5, and by the screw 13 screwed into the joint nut 11 of the tightening cone 9. It is characterized in that the pressing seat 12 made of a corrosion resistant material can be fastened to the surface of the corrosion resistant panel 2.

In the formwork apparatus of claim 9, the tightening cone 9 is characterized in that its cross section is formed in a substantially triangular shape.

[0017]

According to the first and second aspects of the present invention, the construction of the concrete skeleton 1 such as a water tank is completed, and at the same time, the corrosion-resistant panel 2 driven on the surface of the concrete skeleton 1 also performs corrosion-resistant construction.
0% or more ends. Thereafter, the corrosion-resistant treatment of joints 8 between the panels according to the invention of claim 5 and the cone 9 for tightening the pressing seat 12 with the countersunk screw 13 according to the invention of claim 6 are performed.
When the work to tighten the joint nut 11 is completed, the corrosion-resistant construction is completed (Fig. 2). Therefore, the corrosion resistant construction can be performed while maintaining the quality and accuracy of the quality of the corrosion resistant panel 2 manufactured in the factory. The corrosion-resistant panel 2 includes anchor pieces 7 embedded in concrete as claimed in claim 4, and when the anchor pieces are embedded in concrete, the pull-out resistance force (fixing force) of about 28 kg / cm ² per one piece. ) Is exerted, the state of driving into the surface of the concrete skeleton 1 is solid and highly stable. Thus, the corrosion-resistant panel 2 driven into the surface of the concrete skeleton 1 also has the effect of reinforcing the bending strength against external force acting inside and outside the concrete skeleton 1. The anchor piece 7 has a shape that does not impede the fluidity and wraparound of the placed concrete.

As in claims 2 and 6 and claim 9,
The mold 3 is assembled using the separator 5 and the foam tie 6, and in particular the tightening cone 9 that supports the corrosion resistant panel 2
When the threaded portion 5a of the separator 5 and the foam tie screw shaft 10 are screwed to the joint nut 11 of
Even when the formwork 3 is dismantled, the tightening cone 9 remains securely screwed to the threaded portion 5a of the separator 5 and is reliably buried in the concrete skeleton 1 together with the corrosion resistant panel 2 (FIG. 3). Then, the plate screw 13 is screwed into the joint nut 11 of the tightening cone 9 after removing the screw shaft 10 for the form tie, and the pressing seat 12 is strongly tightened on the surface of the corrosion-resistant panel 2, so that the corrosion-resistant panel 2 is driven. Can be strengthened and firmly stabilized (determined), and can also be combined with post-treatment of the tightening cone 9 remaining in the concrete (FIG. 4). In this case, the tightening cone 9 having a substantially triangular cross-section as in claim 9 does not hinder the flowability and wraparound of the placed concrete, especially the aggregate, and if high-quality concrete placing is possible. In addition to tightening, once embedded in concrete, there is an anti-rotation effect that prevents co-rotation of the cone 9 when the dish screw 13 is strongly screwed (tightened), which contributes to firm fastening.

Since the corrosion-resistant panel 2 according to claim 7 is also used as the template in the formwork 3 of the concrete construction for constructing the concrete skeleton 1, the consumption of the template can be reduced by that amount, and the concrete after the construction is driven. It also has the effect of reinforcing the bending strength of the body 1. Further, it is possible to combine the formwork work or concrete work and the corrosion-resistant construction, and it is possible to omit the labor and time and time for the corrosion-resistant construction, which contributes to the shortening of the construction period.
In particular, when the corrosion resistant linings 2b and 2c are formed by using a thermosetting resin as described in claim 8, it is convenient because the adhesive strength that makes the manufacturing process easy and reliable is exhibited. Incidentally, the thermoplastic resin has a large variability in physical property values with respect to temperature changes, and is disadvantageous in use as compared with the thermosetting resin.

[0020]

EXAMPLE An example of the present invention shown in the drawings will be described below.
Fig. 1 shows the formwork 3 assembled to build a concrete structure such as a water tank, and Fig. 2 shows the concrete structure 1 on the surface of the concrete structure 1 on which corrosion-resistant construction is to be performed after curing the cast concrete. The situation where the corrosion resistant panel 2 is driven in is shown. In short, the formwork 3 of FIG. 1 has the corrosion resistant panel 2 arranged as a mold plate (sideboard) on the corrosion resistant construction side of the concrete structure to be built, and the other side (non-corrosion resistant construction side) template (usually plywood or The iron plate 4 is assembled using a separator 5 and a foam tie 6. Of course, depending on the construction conditions, the templates on both sides may consist of corrosion-resistant panels. In FIG. 1, reference numeral 15 is a crosspiece for reinforcing the corrosion resistant panel 2 or the template 4, and 16 is a pipe furring strip or a thick edge. The template 4 on the right side in FIG. 1 is tightened by connecting a separator 5 and a foam tie 6 using a truncated cone 17 which is generally called a wooden cone. Therefore, when the form tie 6 is removed during the dismantling of the form, the tightening cone 17 is also extracted from the concrete skeleton 1 together with the form plate 4, and the mortar 18 is filled in the recess formed in the extraction mark of the cone for repair. (Fig. 2).

On the other hand, a cone 9 for tightening the corrosion resistant panel 2
As shown in detail in FIGS. 3 and 4, the main body is made of ABS resin or polyester resin containing a filler having excellent corrosion resistance and is formed into a truncated pyramid shape having a substantially triangular cross section or a diaper shape. In the axial direction of the central portion of the separator 5, a joint nut 11 capable of screwing the threaded portion 5a of the separator 5 and the screw shaft 10 for the form tie in series to each other by substantially equal lengths is integrally embedded. There is. The tightening cone 9 is screwed to the separator 5 in such a manner that one apex (and its ridgeline) of the triangle faces upward, so as not to impede the fluidity and wraparound of the cast concrete (especially aggregate). Used for. This tightening cone 9 remains in connection with the screw portion 5a of the separator 5 together with the corrosion resistant panel 2 even if the form tie 6 is removed to remove the formwork and the screw shaft 10 for the form tie is removed. It remains buried in the body 1 (Fig. 4). Therefore, as shown in FIG. 4, the countersunk screw 12 can be screwed into the joint nut 11 left after the form tie screw shaft 10 has been removed, and the pressing seat 12 can be pressed against the surface of the corrosion-resistant panel 2 to firmly tighten it. By doing so, the state in which the corrosion-resistant panel 2 is driven into the surface of the concrete skeleton 1 is surely strengthened by an artificial operation afterwards. In this case, since the tightening cone 9 embedded in the concrete has a substantially triangular cross-section as described above, it has a rotation preventing effect, and when the plate screw 13 is strongly tightened, the same is used. The inconvenience that 9 turns together never occurs. Illustrated seat 12
Is injection-molded from a corrosion-resistant ABS resin or the like into a flat spherical shape having a sufficiently wide pressure contact area with a diameter of 65 mm and a thickness of about 10 mm. After fastening, the dish head of the dish screw 13 is in a state of being slightly depressed into the thickness of the presser seat 12, and finally the recess of the depressed dish head is filled with, for example, mica-containing vinyl ester resin 19 or the like. Therefore, the occurrence of crevice corrosion is prevented. Although the plate screw 13 is a stainless steel product, a paste-like resin is filled in advance on the outer circumference of the screw to prevent the corrosion of the gap by filling the screw gap before screwing.

Next, the structure of the above-mentioned corrosion resistant panel 2 will be described. The corrosion-resistant panel 2 is also used as a template for the mold 3 for constructing the concrete skeleton 1 as described above, and has a general size in consideration of the application to the surface of the concrete skeleton on the corrosion-resistant construction surface side. Is 90 vertical
cm, width 180 cm, thickness 12 mm. As shown in FIGS. 3 to 6, the cross-sectional structure of the panel has a thickness of about 2% on the inner and outer surfaces of the lightweight core material 2a having the strength, thickness and corrosion resistance required for the concrete casting template. The structure has corrosion resistant linings 2b and 2c of about 1 mm. Core material 2a
As an example, 59.6 parts by weight of an epoxy resin and 32.1 parts by weight of an inorganic hollow feeler are mixed, and 8.3 parts by weight of triethylenetetramine (TETA) is mixed as a curing agent to form a low foam, Is formed into a sheet of about 10 mm. It is usually manufactured by a trowel or roll press molding method. The corrosion-resistant linings 2b and 2c are formed by, for example, the corrosion-resistant lining 2c on the right side of FIG. 6 being a concrete placing surface that is in close contact with the skeleton concrete 1, and because the corrosive environment becomes an alkaline region due to the concrete, In consideration of the above, first, a glass mat (or glass cloth) 2b, which is thin and light at 0.3 kg per square meter, is provided on the surface of the core material 2a as a reinforcing material (or a supporting material).
It is formed by layering and impregnating a thermosetting epoxy resin on it. Corrosion resistant lining 2b on the left side of FIG.
Depends on the use of the aquarium, it may come into contact with the stored sewage, sludge, or other treated water, and the corrosive environment may become an acidic region due to sulfuric acid, hydrogen sulfide, etc. in the water. One layer of the same glass mat as described above is attached, and a thermosetting vinyl ester resin is impregnated on the mat.

Thus, the corrosion-resistant panel 2 having a thickness of about 12 mm has a bending strength of about 529 kg / cm ² , and the bending strength of the template currently used is 487 kg / cm ^2.
It is larger than the above and has sufficient qualification as a template, and when it is driven into the surface of a concrete skeleton,
It can also have the effect of reinforcing the bending strength of the concrete skeleton. The specific gravity is 0.816, and it is 90 x 180 cm as described above.
It is easy to handle because the construction unit size is 15kg and the weight is 15kg. A water pressure test at a water pressure of 3.5 to 4.0 kg / cm ² was carried out for 3 consecutive days, but it was confirmed that no water leakage occurred and the watertightness was maintained.

On the concrete pouring surface side of the corrosion-resistant panel 2 having the above-mentioned structure, that is, on the right side surface in FIG. 6, the flowability and wraparound property of the pouring concrete (particularly the aggregate) is not impaired, and the pouring concrete is placed. A plurality of anchor pieces 7 having a shape and structure that generate a strong fixing force (pull-out anchor force) when buried inside are provided in a substantially uniform arrangement on the entire surface. The anchor piece 7 of the illustrated example is, for example, an injection-molded product made of ABS resin or the like having excellent corrosion resistance, has a thin circular neck under a spherical head, and has legs thickened in a truncated truncated cone shape. In other words, it is shaped like a Terteru priest. By the way, the diameter of the spherical head is 20 mm, the minimum diameter of the neck is 10 mm, and the height is about 37 mm. The panel is bonded to the corrosion resistant lining surface with an epoxy resin adhesive in the lateral direction,
It is integrated with the panel to withstand diagonal impact and bending forces. The anchor force of concrete of this anchor piece 7 is 26.8 per one by the test.
It has been confirmed to be kg. However, the shape and structure of the anchor piece are not limited to those in the illustrated example. A layout in which the anchor pieces 7 are arranged on the entire surface of the corrosion resistant panel 2 is shown in FIG. Basically, anchor pieces are placed at each apex of a rhombus with a diagonal length of 30 cm and a length of 30 cm, and evenly placed on the entire surface of the above 90 × 180 cm corrosion-resistant panel.
Six are provided. Therefore, as long as the anchoring force of the anchor piece 7 is used, the corrosion resistant panel 2
In addition to the case of assembling the mold 3 with the separator 5, the foam tie 6 and the like as shown in FIG. 1, the method of assembling and using the mold by various known and well-known means without using them can be used. You can Of course, when the fastening force of the pressing seat 12 is used together with the anchor piece 7, the fixing force of the corrosion-resistant panel 2 driven into the surface of the concrete frame 1 is quite large, for example, groundwater pressure permeated from the ground side or There is no fear of peeling off or swelling due to vapor pressure when water is evaporated, and the corrosion-resistant panel 2 greatly contributes to the function of reinforcing the bending strength of the concrete skeleton.

Finally, as described above, the corrosion-resistant panel 2 which is applied to the surface of the concrete skeleton 1 in a driven state is
Since joints are formed between each other, as a treatment after curing the cast concrete and dismantling the formwork, as shown in FIGS. 8 and 9, along the joints 8, for example, a width of about 9 cm is thin. A band-shaped glass mat 2d is adhered, and a thermosetting epoxy resin 2e having excellent corrosion resistance is impregnated onto the glass mat 2d to perform a corrosion-resistant treatment for preventing crevice corrosion of the joint 8, and the corrosion-resistant construction is completed 100%. Of.

[0026]

According to the corrosion resistance and construction method of the present invention, the corrosion resistant panel 2 used as the template of the frame for constructing the concrete structure 1 is directly applied to the surface of the concrete structure. It is driven in and corrosion resistant construction is applied,
After all, the labor and man-hours of corrosion-resistant construction are included as part of the concrete construction of the skeleton, and about 90% of the corrosion-resistant construction is completed at the same time as the completion of the concrete skeleton (demolition of the formwork), leveling the construction, and combining This will contribute to a drastic reduction in the construction period, a reduction in the number of workers, a reduction in template wear, and a substantial reduction in construction costs.

In addition, since the corrosion-resistant panel 2 manufactured in the factory under sufficient quality control is used, it is not affected by the difference in individual ability of the craftsmen on site and the difference in the atmosphere condition at the site. The construction quality is obtained, the corrosion resistance is great, and the corrosion resistance construction with long-term stability and reliability is enabled. Moreover, the groundwater pressure that penetrated into the concrete structure,
Alternatively, the corrosion-resistant panel 2 exerts sufficient strength against the action of various external forces such as the pressure of evaporation of water in the concrete, and is integrated into the surface of the concrete skeleton 1 in a stable and reliable driving state for a long period of time. It is installed in a concrete manner, and shows the effectiveness of the anticorrosion treatment. In addition, the corrosion-resistant panel 2 driven into the surface of the concrete frame can also be expected to have the effect of reinforcing the bending strength of the concrete frame against load such as earth pressure.

The corrosion-resistant panel according to the invention of claim 7 can ensure an average construction quality on site by being manufactured in a factory with uniform quality. Also, it is suitable for use as a template for a construction frame of the concrete structure 1, and can perform strong driving on the surface of the concrete structure. Of course, it has a large corrosion resistance effect and long-term stability and reliability. Enables highly corrosion resistant construction. And it contributes not only to the water tank but also to the corrosion resistant construction of various concrete structures.

In the formwork apparatus according to the ninth and tenth aspects of the present invention, the corrosion-resistant panel 2 having the above-mentioned structure is used as a template, and the corrosion-resistant panel 2 is driven into the surface of the concrete skeleton 1 and the driving state thereof. It can be strengthened, which in turn contributes to ensuring the quality of corrosion-resistant construction and improving stability and reliability.

[Brief description of drawings]

FIG. 1 is a cross-sectional view showing a state of construction of a concrete skeleton by a formwork device using a corrosion resistant panel.

FIG. 2 is a cross-sectional view showing a corrosion-resistant panel driven into the surface of a concrete structure.

FIG. 3 is a cross-sectional view showing a related structure of a corrosion-resistant panel, a separator, a foam tie, and a tightening cone.

FIG. 4 is a cross-sectional view of a structure in which a corrosion resistant panel is tightened with a pressing seat.

FIG. 5 is a right side view of the tightening cone.

FIG. 6 is a cross-sectional view showing a situation where a corrosion-resistant panel is driven into a concrete surface by using an anchor piece.

FIG. 7 is a front view partially showing an arrangement example of anchor pieces of a corrosion-resistant panel.

FIG. 8 is a plan view partially showing the anticorrosion treatment of the joints of the anticorrosion panel.

FIG. 9 is a front view partially showing the anticorrosion treatment of the joints of the anticorrosion panel.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Concrete structure 2 Corrosion resistant panel 3 Formwork 1a Concrete 4 Template 5 Separator 6 Form tie 2a Core material 2b, 2c Corrosion resistant lining 7 Anchor piece 2d Glass mat 2e Synthetic resin 8 Joints 9 Tightening cone 10 Form tie screw shaft 11 Joint nut 12 Presser seat 13 Plate screw

Claims (10)

[Claims] 1. When constructing a water tank or the like with a concrete structure, arranging a corrosion-resistant panel as a mold plate on the corrosion-resistant construction surface side of the concrete structure to assemble a formwork, placing concrete in the formwork, After the dismantling of the mold, the corrosion-resistant panel is driven into the surface of the concrete structure, and the corrosion-resistant construction method using a concrete structure such as a water tank. 2. When constructing a water tank or the like with a concrete structure, a corrosion-resistant panel is arranged as a mold on the corrosion-resistant construction surface side of the concrete structure, and a mold is formed using a mold plate on the other side, a separator, and a foam tie. Assembling, placing concrete in the formwork, and after dismantling the formwork, placing the corrosion-resistant panel in the state of being driven into the surface of the concrete structure, corrosion-resistant construction method such as a water tank by the concrete structure . 3. The corrosion resistant panel according to claim 1 or 2, wherein 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 casting template, and the mat is corrosion resistant. A corrosion-resistant construction method for a water tank or the like using a concrete skeleton, which is characterized in that a synthetic resin is impregnated to form a corrosion-resistant lining. 4. The corrosion-resistant panel according to claim 1, 2 or 3,
A corrosion-resistant construction method for a water tank or the like using a concrete skeleton, characterized in that it is provided with a plurality of anchor pieces having a shape and structure that are highly evenly arranged and have a high bondability with concrete over the entire surface of the concrete pouring side. 5. The joint between the corrosion-resistant panels that have been driven into the surface of the concrete structure according to claim 1 or 2 has a strip-shaped glass mat attached along the joint after the dismantling of the formwork. A corrosion resistant construction method for a water tank or the like using a concrete structure, characterized in that the concrete is impregnated with a corrosion resistant synthetic resin for corrosion resistance treatment. 6. When assembling the formwork according to claim 2,
The tightening cone that supports the corrosion-resistant panel on the separator is made of a corrosion-resistant material and has a structure with a joint nut that can screw the separator screw and the foam tie screw shaft in series. After disposing the concrete in place and curing it until the concrete develops strength, remove the form tie and remove the screw shaft for the form tie from the joint nut of the tightening cone. Tighten to the surface of the corrosion-resistant panel with a countersunk screwed into the joint nut of the tightening cone with a presser seat of a corrosion-resistant material with a sufficiently wide pressure contact area at the cone position,
Further, the head of the dish screw is subjected to anticorrosion treatment, and the anticorrosion panel is driven into the surface of the concrete structure to provide a corrosion resistant construction method for a water tank or the like using the concrete structure. 7. A corrosion resistant lining is formed by attaching a thin glass mat to the inner and outer surfaces of a core material having strength, thickness and corrosion resistance required for a concrete casting template and impregnating the mat with a corrosion resistant synthetic resin. A corrosion-resistant panel, characterized in that it further comprises a plurality of anchor pieces having a shape and structure that are highly evenly arranged over the entire surface of the concrete pouring side and have a high bondability with concrete. 8. The core material according to claim 7 is a low-foaming sheet such as epoxy resin, the corrosion-resistant synthetic resin is a thermosetting resin such as epoxy resin or vinyl ester resin, and the anchor piece is corrosion-resistant. A corrosion-resistant panel, which is a molded product made of ABS resin or the like and is adhered to the surface of the panel. 9. A corrosion resistant panel is arranged as a mold plate on the corrosion resistant construction side of a concrete skeleton, and a mold frame is assembled using a separator and a foam tie with the mold plate on the other side, in particular, the corrosion resistant panel. The tightening cone for supporting the separator on the separator is made of a corrosion-resistant material, and has a structure with a joint nut capable of screwing the screw part of the separator and the screw shaft for the form tie in series. Also, the tightening cone is buried in the concrete together with the corrosion-resistant panel while being screwed to the separator, and the retaining screw made of a corrosion-resistant material can be tightened to the surface of the corrosion-resistant panel with the screw screwed into the joint nut of the tightening cone. A mold device for corrosion-resistant construction of a water tank or the like using a concrete structure. 10. The formwork apparatus according to claim 9, wherein the tightening cone has a substantially triangular cross section.