KR100982241B1 - Repairing method of steel pipe and concrete pile - Google Patents

Abstract

PURPOSE: A repair and reinforcement method of a concrete column and a steel pipe, by using a reinforcing member made of fiber or polyvinyl chloride is provided to prevent environmental contamination and to improve anti-corrosive function and water-tightness. CONSTITUTION: A repair and reinforcement method of a concrete column and a steel pipe is as follows. A deterioration portion of the concrete column and steel pipe is arranged(S10). A first stiffener is successively up and down wined and installed in the outer circumference of a concrete column and steel pipe in order to surround a pre-processed deterioration portion(S20,S30,S40). The first stiffener is made of fiber of poly vinyl chloride.

Description

REPAIRING METHOD OF STEEL PIPE AND CONCRETE PILE}

The present invention relates to a repair and reinforcing method of steel pipes and concrete columns, and more particularly, by using a reinforcement made of fiber or polyvinyl chloride rather than a metal material, which can improve corrosion resistance and watertightness and prevent environmental pollution. The present invention relates to a repair and reinforcement method for steel pipes and concrete columns.

In general, concrete is composed of cement, coarse aggregate, fine aggregate, admixture, etc., unlike other construction materials (rebar), the composition of the material is varied, heterogeneous physical properties are combined with each other.

The quality of these concretes is closely related to the quality of the constituent materials and depends on the mixing ratio, casting method and curing method.

High-quality concrete has long been used in construction and civil engineering materials because it is economical and semi-permanent, while low-quality concrete quickly breaks down when exposed to poor environmental conditions.

On the other hand, as the shape of the concrete structure has recently diversified and complicated, there are often cases in which more load is applied than the original design load and the strength of the lower part of the bridge due to dredging of the estuary is often increased.

Thus, in the related art, many reinforcement methods using steel plates were used, but due to the weight of the steel plate, the weight of the concrete structure increases, and as time passes, corrosion occurs to spoil the aesthetics and cause environmental pollution.

In more detail, in the prior art, using a steel sheet formwork in a concrete structure to construct a bridge by the well filling method.

The well formwork frame used in the construction of the well is composed of an inner steel sheet formwork and an outer steel sheet formwork made of metal material at an interval between the inner steel sheet formwork and the outer steel sheet formwork at an interval to function as a tension member. It is structurally designed to be lateral pressure safe and fills concrete between the inner and outer steel formwork to create a pier concrete structure. At this time, the internal iron sheet formwork is completely buried in concrete.

However, when the concrete structure is made using the sheet metal formwork as described above, there is a problem that a thickness erosion phenomenon occurs that the outer steel sheet form contact with water or air a little corroded every year, the thickness is thinned, and the concrete There was a disadvantage of accelerating deterioration.

Moreover, in the case of making concrete structures using these sheet metal formwork in the water source water, it causes corrosion effect and releases a large amount of harmful substances containing iron, becoming a source of pollution of the water source, and the strength of the pier structure gradually increases as the corrosion progresses. There was a problem of weakening and reducing the safety of the piers.

In addition, steel pipes, like concrete structures, age after a long time after construction and require repair and reinforcement. The repair of these steel pipes depends on the degree of damage and intensification of the cracks. If the cracks are large or the structure is broken, the reinforcement method is used.

Accordingly, an object of the present invention is to provide a repair and reinforcing method for steel pipes and concrete columns that can improve corrosion resistance and watertightness and prevent environmental pollution.

The object is a pre-treatment step of arranging the deteriorated portion of the steel pipe and the concrete pillar, according to the repair and reinforcement method of the steel pipe and concrete pillar of the present invention; A first reinforcement made of fiber or polyvinyl chloride is wound on the outer circumferential surfaces of the steel pipe and the concrete column so as to be wrapped around the deteriorated portion of the pretreated portion.

Here, it is preferable to further include the step of connecting the first reinforcing material adjacent to each other in the vertical direction with a first connecting material.

In addition, it is preferable to further include a step of winding and installing the second reinforcement made of fiber or polyvinyl chloride sequentially in the vertical direction on the outer peripheral surface of the first reinforcement.

At this time, the direction in which the second reinforcing material is wound around the outer circumferential surface of the first reinforcing material is preferably a direction that is shifted from the direction in which the first reinforcing material is wound.

At this time, the second reinforcing material adjacent to each other in the vertical direction may be further included with the step of connecting to each other with a second connecting material.

It is preferable to further include the step of injecting a filler between the first reinforcing material and the second reinforcing material.

The first reinforcing member and the second reinforcing member have a reinforcing body having a flat surface; It is preferable to include hook portions formed at both ends of the reinforcing body.

At this time, it is preferable that ribs protrude at predetermined intervals on the plate surface of the reinforcing body.

On the other hand, the first connecting member and the second connecting member and the connecting body having a flat surface; It is preferable to include a catch portion formed at both ends of the connection body to hold the hook portion.

Preferably, the connection body is provided with a separation prevention part that is spaced apart from the locking part by a predetermined distance and prevents the separation of the hook part held by the locking part.

Further, before attaching the first reinforcing material to the outer circumferential surface of the steel pipe and the concrete pillar, glass fiber panels are spaced apart from the bottom of the steel pipe and the concrete pillar, and an injection hole is provided between the steel pipe and the concrete pillar and the glass fiber panel. By installing, it is preferable to further include the step of injecting a filler in the injection hole.

At this time, the fiber is preferably impregnated with epoxy vinyl ester by selecting one of glass fiber, carbon fiber, aramid fiber.

As described above, according to the present invention, by reinforcing by using a reinforcing material made of fiber or polyvinyl chloride rather than a metal material, according to the present invention, steel pipes and concrete columns that can improve corrosion resistance and watertightness and prevent environmental pollution Reinforcement method is provided.

1 is a perspective view showing a concrete column deteriorated state.
Figure 2 is a perspective view showing a state in which the glass fiber panel and the injection hole is installed on the lower end of the concrete pillar after removing the deteriorated portion of FIG.
Figure 3 is a perspective view showing a state in which the first reinforcing material is installed on the outer circumferential surface of the concrete pillar after the process of FIG.
4 is a perspective view showing a state in which a second reinforcing material is installed on the outer circumferential surface of the first reinforcing material after the process of FIG. 3;
Figure 5 is a plan view showing a concrete column in a state of repair and reinforcement using the reinforcement method according to the invention.
Figure 6 is a flow chart showing step by step reinforcement method according to the present invention.
Figure 7 is a cross-sectional view showing a first reinforcing material used in the repair reinforcement method according to the invention.
Figure 8 is a cross-sectional view showing a first connecting member used in the reinforcement method according to the present invention.
9 is a cross-sectional view illustrating a state in which the first reinforcing member of FIG. 7 and the first connecting member of FIG. 8 are connected to each other.
10 is a process diagram briefly illustrating a process of producing a first reinforcement and a second reinforcement using fibers.
(A)-(c) is sectional drawing which shows the modification of the 1st reinforcement material and the 2nd reinforcement material in this invention.
(A) and (b) are sectional drawing which shows the modification of the 1st connection material and the 2nd connection material in this invention.

Hereinafter, the present invention will be described in detail with reference to the accompanying drawings.

Prior to the description, in the various embodiments, components having the same configuration will be representatively described in the first embodiment using the same reference numerals, and in other embodiments, only the configuration different from the first embodiment will be described. do.

Repair and reinforcement method according to the present invention is different from the conventional metal plate used in the reinforcement (R1, R2, R3, ...) made of fiber or polyvinyl chloride (P1, P2, P3, ...) using a steel pipe and concrete column ( By reinforcing and reinforcing 10), particularly, the corrosion resistance and watertightness of steel pipes and concrete columns 10 located in water, such as rivers, seas, bridges, etc. are improved, and environmental pollution can be reduced.

In this embodiment will be described for the method of repairing and strengthening the concrete column (10).

1 to 5 is a perspective view showing a process of repairing a concrete column using a repair reinforcement method according to the present invention, Figure 6 is a flow chart showing a step by step repairing reinforcement method according to the present invention.

First, using a wire brush, a grinder chipper, etc., pretreatment for arranging the deteriorated portion 15 of the concrete pillar 10 is performed (S10). At this time, it is more preferable to remove foreign matters and the like on the outer circumferential surface of the concrete column 10 by spraying high pressure water with a nozzle pressure of 100 to 150 kg / cm 2 or more.

Next, the glass fiber panel 20 is spaced apart from the lower end of the concrete column 10, and an injection hole 25 is installed between the concrete column 10 and the glass fiber panel 20 to fill the injection hole 25. (F1) is injected (S20). Here, the glass fiber panel 20 not only serves to prevent the second reinforcement (P1, P2, P3, ...) to be installed later, the first reinforcement (R1, R2, R3, ...) and Before the second reinforcing material (P1, P2, P3, ...) is installed serves to prevent the concrete pillar 10 from being damaged by stones or sand in the water. At this time, the filling material (F1) is preferably to use a grout with good adhesion to the concrete column 10, the capacity is preferably about 1/3 of the height of the glass fiber panel 20, but is not limited thereto. Of course.

When the foundation work as described above is completed, the first reinforcing material (R1, R2, R3, ...) is wound on the outer circumferential surface of the concrete column 10 in a vertical direction so that the pretreated deteriorated portion (15 ') is wrapped in an epoxy resin Install by attaching. At this time, the first reinforcing members (R1, R2) (R2, R3) (...) adjacent to each other in the up and down direction are connected to each other by the first connecting member (C1) (C2) (C3) (...) to the upper side It is good to strengthen the binding force between the first reinforcement and the lower first reinforcement (S30).

Here, the first reinforcing members (R1, R2, R3, ...), as shown in Figure 7, the reinforcing body 31 having a flat surface, and hook portions 32, 33 formed on both ends of the reinforcing body 31 It consists of At this time, the ribs 35 having a 'T' shape are protruded at predetermined intervals on the plate surface of the reinforcing body 31 to reinforce the rigidity of the first reinforcing materials R1, R2, R3,... In addition, the rib 35 serves to attach the first reinforcement materials R1, R2, R3,... To the concrete column 10 as much as possible, thereby allowing the first reinforcement materials R1, It serves to improve the adhesion function of R2, R3, ...). At this time, the hooks 32 and 33 are not formed on the reinforcing body 31, and only the reinforcing body 31 is made of a panel, and a method of sequentially attaching the concrete pillars 10 may be used.

On the other hand, the first connecting member (C1, C2, C3, ...), as shown in Figure 8, is formed on both ends of the connecting body 41 and the connecting body 41 having a flat surface hook portion 32, 33) and the engaging portions 42, 43 for holding. At this time, the separation body 45, which is spaced apart from the locking parts 42 and 43 by a predetermined distance, to prevent the separation of the locking parts 42 and 43 and the hook parts 32 and 33 held by the connecting body 41. 46) is preferably formed. The coupling relationship between the first reinforcing members (R1, R2, R3, ...) and the first connecting members (C1, C2, C3, ...) is as shown in Figure 9, the first reinforcing members R1 and R2 and the first agent is C1 1 The coupling between the connecting materials will be described as an example.

That is, after the epoxy resin is applied to the outer circumferential surface of the concrete pillar 10, the rib 35 is positioned to face the concrete pillar 10, and the first reinforcement, which is R1, is wound around the outer circumferential surface of the concrete pillar 10. Thereafter, the first connecting member C1 is positioned below the first reinforcing member R1 so that the lower hook portion 33 of the first reinforcing member R1 is locked to the upper locking portion 42 of the first connecting member C1. . At this time, the separation preventing portion 45 formed to be spaced apart from the upper locking portion 42 by pushing the lower hook portion 33 toward the upper locking portion 42 side, the lower hook portion 33 is the upper locking portion 42. Serves to prevent deviations from Next, the second reinforcing member of R2 is positioned below the second connecting member of C1, and the upper hook portion 32 of the second reinforcing member of R2 is assembled to be held by the lower engaging portion 43 of the second connecting member of C1. At this time, the separation preventing portion 46 formed to be spaced apart from the lower locking portion 43 by a predetermined distance by pushing the upper hook portion 32 toward the lower locking portion 43, the upper hook portion 32 is the lower locking portion 43 Serves to prevent deviations from

At this time, in order to enhance the bonding force between the first connecting member (C1) and the first reinforcing member (R1 and R2), by applying the adhesive (B) to the space between the locking portions 42, 43 and the separation prevention portion (45, 46) It is preferable to connect with each other.

The first reinforcing members (R1, R2, R3, ...) and the first connecting members (C1, C2, C3, ...) may be assembled in order on the outer circumferential surface of the concrete column 10 in the same manner as described above.

Next, the second reinforcing members P1, P2, P3, ... are sequentially wound up and down on the outer circumferential surfaces of the first reinforcing members R1, R2, R3, ... in the vertical direction. At this time, the second reinforcing members P1, P2 (P2, P3) (...) adjacent to each other in the up-down direction are connected to each other with the second connecting members D1 (D2) (D3) (...) to be relatively upper 2 it is good to strengthen the binding force between the reinforcing material and the second lower reinforcing material (S40). Here, the direction of winding the second reinforcement (P1, P2, P3, ...) on the outer circumferential surface of the first reinforcement (R1, R2, R3, ...) is shifted from the direction in which the first reinforcement (R1, R2, R3, ...) Direction is good.

Here, the configurations of the second reinforcing members (P1, P2, P3, ...) and the second connecting members (D1, D2, D3, ...) are the first reinforcing members (R1, R2, R3, ...) and the first connecting member described above, respectively. The same as (C1, C2, C3, ...) and the coupling structure is also the same, so a description thereof will be omitted.

Finally, the filling material F2 is injected into the space between the first reinforcing materials R1, R2, R3, ... and the second reinforcing materials P1, P2, P3, ..., and the first reinforcing materials R1, R2, R3,... ) And the second reinforcing material (P1, P2, P3, ...) are integrally coupled to each other (S50). At this time, the filling material (F2) is used to grout or epoxy resin, but not limited to, if the first reinforcing material (R1, R2, R3, ...) and the second reinforcing material (P1, P2, P3, ...) is to be bonded to each other Anything is OK.

The first reinforcing material (R1, R2, R3, ...) and the second reinforcing material (P1, P2, P3, ...) used in the present invention is made of fiber or polyvinyl chloride, unlike the conventional metal reinforcing material has good corrosion resistance and watertightness, There is an advantage that can prevent environmental pollution. At this time, when the first reinforcing material (R1, R2, R3, ...) and the second reinforcing material (P1, P2, P3, ...) is a fiber, one of glass fiber, carbon fiber, aramid fiber is selected and impregnated in the epoxy vinyl ester. It is preferable to be impregnated with an epoxy vinyl ester, and the manufacturing process thereof is shown in FIG. 10.

That is, after determining the mixing ratio of the glass fibers, carbon fibers, and aramid fibers, the mixed fibers are passed through a reservoir in which the impregnating epoxy vinyl ester is stored so that the epoxy vinyl ester can sufficiently penetrate between the fibers. Thereafter, the mold is molded into a predetermined shape through a molding table, and then cured in a heating table, and then cut into a predetermined length using a cutter through a pulling roller to be completed.

On the other hand, when the first reinforcing material (R1, R2, R3, ...) and the second reinforcing material (P1, P2, P3, ...) is a hard polyvinyl chloride, if it is molded in its own shape on the molding table without impregnation do.

At this time, the width of the first reinforcing material (R1, R2, R3, ...) and the second reinforcing material (P1, P2, P3, ...) is about 0.5m ~ 5m, the thickness is about 2mm ~ 20mm, the length is various It is possible to manufacture.

Here, the mechanical properties according to the material of the first reinforcing material (R1, R2, R3, ...) and the second reinforcing material (P1, P2, P3, ...) are shown in the following table.

Kinds Fiberglass reinforcement Carbon fiber reinforcement Aramid Fiber Reinforcement Glass fiber + carbon fiber
reinforcement Rigid Polyvinyl Chloride Reinforcement Epoxy vinyl ester impregnant The tensile strength
(N / mm2) 500 2,730 2,700 750 36 84.5 Tensile Modulus
(N / mm2) 25,000 235,000 130,000 26,000 2,300 3,800 Fracture strain
(%) 2.0 1.2 2.6 2.8 50-170 -

The widths of the first connecting members C1, C2, C3, ..., and the second connecting members D1, D2, D3, ... are 10 mm or more, and the lengths of the first reinforcing members R1, R2, R3, ..., respectively. And the second reinforcing material P1, P2, P3, ... may be in a range that can be easily combined with each other.

11 (a) to 11 (c) are cross-sectional views showing modifications of the first reinforcing material and the second reinforcing material in the present invention.

That is, the ribs 35 of the first reinforcement members R1, R2, R3,... And the second reinforcement members P1, P2, P3,... Are formed in a 'T' cross section. A rib may not be formed as shown in (), (b) and the rib 235 may be formed in a 'ㅣ' cross section, and as in (c), the rib 335 may be formed in a 'Π' cross section. Of course, the shape of the ribs is not limited to this and can be variously changed.

12A and 12B are cross-sectional views showing modifications of the first connecting member and the second connecting member in the present invention.

That is, the locking portions 42 and 43 and the separation prevention portions 45 and 46 of the above-described first connecting members C1, C2, C3, ... and second connecting members D1, D2, D3, ... are changed. As shown in FIG. 12 (a), the locking parts 242 and 243 are formed in a ring shape, and the separation prevention part may be omitted, and the locking parts 342 and 343 may be 'ㅓ' or (b). It is made of a 'ㅏ' shape and the departure prevention portion (345, 346) may be made of a minimum size and shape to the extent that it is possible to prevent the separation of the hook portion to be caught on the engaging portion (342, 343). At this time, the shape of the hook portion of the first reinforcing material and the second reinforcing material should be deformed so that the male and female coupling corresponding to the shape of the locking portion.

As described above, according to the present invention, unlike the prior art, the concrete column 10 is formed using reinforcing materials R1, R2, R3, ... (P1, P2, P3, ...) made of fiber or polyvinyl chloride rather than a metal material. By maintenance reinforcement, corrosion resistance and water tightness can be improved and environmental pollution can be prevented.

Although the above-described embodiment uses concrete pillars as an example, it can be applied to steel pipes, and of course, the filling material may use an epoxy resin having good adhesion with steel pipes.

10: concrete pillar 15: deteriorated part
20: glass fiber panel 25: injection hole
31: reinforcing body 32, 33: hook portion
35: rib 41: connecting body
42, 43: locking portions 45, 46: separation prevention portion

Claims (12)

A pretreatment step of cleaning up the deteriorated parts of the steel pipe and the concrete column;
Installing a glass fiber panel spaced apart from the lower end of the steel pipe and the concrete column, and installing an injection hole between the steel pipe and the concrete column and the glass fiber panel to inject a filler into the injection hole;
Repairing the steel pipes and concrete pillars comprising the step of winding the first reinforcement made of fiber or polyvinyl chloride sequentially in the vertical direction on the outer circumferential surface of the steel pipe and the concrete pillar so that the deteriorated portion is pretreated Reinforcement method. The method according to claim 1,
Repair and reinforcement method of the steel pipe and concrete pillars further comprising the step of connecting the first reinforcing members adjacent to each other in the vertical direction with the first connecting member. The method according to claim 2,
Repairing and reinforcing steel pipe and concrete column further comprising the step of winding and installing the second reinforcing member made of fiber or polyvinyl chloride sequentially in the vertical direction on the outer peripheral surface of the first reinforcing material. The method according to claim 3,
The reinforcing method for reinforcing steel pipes and concrete columns, characterized in that the direction in which the second reinforcing material is wound around the outer circumferential surface of the first reinforcing material is in a direction that is displaced from the direction in which the first reinforcing material is wound. The method according to claim 4,
Repair and strengthen the steel pipe and concrete column further comprises the step of connecting the second reinforcing members adjacent to each other in the vertical direction with a second connecting member. The method according to claim 5,
Repair and reinforcement method of steel pipes and concrete pillars further comprising the step of injecting a filler between the first reinforcing material and the second reinforcing material. The method of claim 6, wherein the first reinforcement and the second reinforcement
A reinforcing body having a flat surface;
Repair and reinforcement method of the steel pipe and concrete pillars comprising a hook portion formed on both ends of the reinforcing body. The method according to claim 7,
Reinforcement method of steel pipes and concrete pillars, characterized in that ribs protrude at predetermined intervals on the plate surface of the reinforcing body. The method according to claim 8, wherein the first connecting member and the second connecting member
A connecting body having a flat surface;
Repair and reinforcement method of the steel pipe and the concrete pillars, characterized in that formed on both ends of the connecting body comprises a locking portion to hold the hook and the hook. The method according to claim 9,
The connection body is a maintenance reinforcement method of the steel pipe and the concrete pillar, characterized in that the separation is separated from the locking portion by a predetermined distance to prevent the separation of the hook portion is held with the locking portion. delete The method according to claim 1 or 3,
The fiber is selected from glass fiber, carbon fiber, aramid fiber, and reinforcement method of steel pipes and concrete columns, characterized in that the impregnated in the epoxy vinyl ester.

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