KR101062883B1 - Fiberglass Reinforced Plastic Manholes and Manufacturing Method Thereof - Google Patents

Abstract

The present invention relates to a manhole formed by laminating glass fiber reinforced plastic (GRP) and a manufacturing method thereof, including: a manhole body formed by laminating reinforcing fibers; And a lower slab coupled to the lower portion of the manhole body and formed by reinforced concrete, wherein the lower slab comprises: a first reinforcing bar provided to provide rigidity to the concrete; And a second rebar disposed through the inner wall of the manhole body. These glass fiber reinforced plastic manholes have no leaks and are excellent in corrosion resistance, and are simple to cut and join in the field, which can reduce manpower and shorten air, and the first slab and manhole for reinforcing lower slab Since the second reinforcing bar is included for coupling with the main body, the coupling force to the lower slab of the manhole body can be increased to prevent cracking between the manhole main body and the lower slab due to the change of ground conditions during the movement of the manhole or after construction. .

Manhole, GRP, fiber reinforced, slab

Description

Glass Fiber Reinforced Plastic Manhole and Manufacturing Method Thereof {GLASS FIBER REINFORCED PLASTIC MANHOLE AND METHOD FOR FABRICATING THE SAME}

The present invention relates to a manhole and a method for producing the laminated glass fiber.

In general, the manhole is installed on the sewage pipe at regular intervals to adjust the slope of the pipe, drain the sewage from the inlet pipe formed in various directions, or induce collection, and check, clean, and vent in the pipe. It is a sewage facility installed for.

Traditional manhole is a method of manufacturing formwork in the field and reinforcing concrete in the formwork, which can be constructed according to the site conditions.

However, when attaching the branch pipe, since the opening is formed in the inner and outer molds, it is impossible to work precisely according to the outer diameter of the tube due to the characteristics of the formwork, and the strength of the connection after the connection may be weakened. If the ground load acts differently, a bending stress is applied to the connection part, so that a crack may easily occur in the connection part.

Moreover, the manhole of this type of cast-in-place can not be height-adjusted when repacking, it is impossible to winter and underwater construction, it needs long-term curing (at least one week), causing the air to be long, and the skill of the worker There is a problem in that the quality of the construction shows a big difference.

In view of the above, the present invention has a technical object of making it possible to obtain a manhole excellent in rigidity and workability by using a tubular body formed by laminating reinforcing glass fibers as a manhole body.

Another object of the present invention is to integrally combine the fiber reinforced manhole body and the lower slab so as to maintain a firmly coupled state against impact or load changes.

In order to solve the above problems, the present invention discloses a glass fiber reinforced plastic (GRP) comprising a manhole body and a lower slab formed by reinforced concrete coupled to the lower part of the manhole body and laminated reinforcement fiber. The lower slab includes a first reinforcing bar that is reinforced to provide rigidity to the concrete, and a second reinforcing bar that is disposed through the inner wall of the manhole body.

As an example related to the present invention, the reinforcing hole may be formed to allow the second reinforcing bar to pass through a portion where the manhole body is buried in concrete.

As an example related to the present invention, a plurality of second rebars may be formed and disposed to cross each other. In this case, the second rebar may be horizontally disposed in parallel with the first rebar.

In order to reinforce the binding force of the manhole body, coarse sand may be attached to the site of the manhole body by the resin. In addition, watertightness can be improved by further fixing the water expansion index ring outside the portion of the manhole body buried in the concrete.

As an example related to the present invention, a manhole body includes: a first reinforcing layer in which resin is impregnated into a unit fiber layer; A core layer laminated on the outside of the first reinforcing layer and having the resin impregnated in the silica sand; And a second reinforcing layer laminated on the outside of the core layer and having the resin impregnated in the unit fiber layer.

As an example related to the present invention, the first reinforcing layer and the second reinforcing layer, the first unit fiber layer wound so that the fiber yarn is arranged in parallel with the circumferential direction; And a second unit fiber layer wound so that the fiber yarns are arranged parallel to the longitudinal direction.

The present invention also comprises the steps of forming a manhole body formed by cutting a pipe formed by laminating reinforcing fibers; And coupling the lower slab to the manhole body, wherein the joining of the lower slab comprises: sanding a portion to be buried in the lower slab below the manhole body and forming a reinforcement hole at a predetermined position; Reinforcing the formwork with a first reinforcing bar to provide rigidity to the concrete; And placing the second reinforcing bar in the reinforcement hole. And positioning the manhole body in the formwork, filling the concrete, and curing to integrally couple the lower slab to the manhole body to disclose a method of manufacturing a glass fiber reinforced plastic (GRP) manhole.

According to the pump station related to the present invention as described above, since the fiber-reinforced main body having excellent rigidity is used, it is possible to elastically deform, which is strong in impact, lightweight, and excellent in workability. Furthermore, there is no leakage and excellent corrosion resistance can be used semi-permanently. In addition, since the strength of the connection part with the branch pipe is very high, safety is ensured by embedding and vehicle load, and cutting and joining are simple in the field, so that it is easy to fit the site, thereby reducing manpower and reducing air. .

Since the lower slab includes a first reinforcing bar for reinforcement and a second reinforcing bar for joining the manhole body, the coupling force of the manhole body to the lower slab is increased so that the manhole main body It is possible to prevent cracks between the lower slabs.

1 is a perspective view showing the appearance of a glass fiber reinforced plastic (GRP) manhole according to the present invention.

Referring to FIG. 1, the manhole 1 includes a manhole body 10 coupled with a required number of branch pipes 40 to be connected to a sewer pipe, a lower slab 20 coupled to a lower portion of the manhole body 10, and The upper slab 30 which covers the upper part of the manhole main body 10 is provided. However, the present invention is not limited to the manhole disclosed in FIGS. 1 to 7 to be described below, and may be applied to a facility such as a pump station.

Such a manhole 1 is distinguished from a concrete manhole of a site-pouring type in that it is manufactured in the form disclosed in FIG. 1 directly at a factory or a workshop, not a site to be constructed, and then moved to a site to be constructed.

The upper slab 30 is formed with a check hole 31 to allow an operator to enter and exit the manhole 1 for inspection or maintenance. Check hole 31 may be formed of a plurality, it is covered by the manhole cover after the construction of the manhole (1).

Figure 2 is a perspective view showing a cutting step for forming a manhole body according to the present invention.

The manhole body 10 disclosed in FIG. 1 is obtained by cutting the fiber reinforced pipe P as shown in FIG. 2 to the required length.

Pipe (P) is formed by laminating a glass fiber (carbon fiber) or carbon fiber (carbon fiber) with a resin. As disclosed in the enlarged view of FIG. 2, the pipe P may include a first reinforcing layer 53 in which resin is impregnated in a unit fiber layer, and a core layer in which resin is impregnated in silica sand and laminated on the outside of the first reinforcing layer 53. 57) and a second reinforcing layer 59 laminated on the outside of the core layer 57 and impregnated with the unit fiber layer. However, the number of reinforcement layers 53 and 59 may be increased for reinforcement, and the number of core layers 57 may be increased to secure thickness or weight.

The first reinforcing layer 53 and the second reinforcing layer 59 are wound so that the first unit fiber layers 54, 56, 60, 62 and the fiber yarns are wound so that the fiber yarns are arranged in parallel with the circumferential direction. The second unit fiber layers 55 and 61 are respectively formed to increase rigidity with respect to the internal pressure in the radial direction and the longitudinal direction. In the enlarged view of FIG. 2, for example, each reinforcing layer 53 and 59 includes two first unit fiber layers 54, 56, 60 and 62, respectively, and two first unit fiber layers 54, 56 and 60 are illustrated. An example in which one second unit fiber layer 55 or 61 is stacked between the two layers 62 is provided. In addition, the number of unit fiber layers can be increased or decreased, and the order of the arrangement can be reversed.

The first reinforcing layer 53 and the second reinforcing layer 59 are formed on the mandrel with the inner protective layer 51, the first nonwoven fabric 52, the first reinforcing layer 53, the core layer 57, and the second. The nonwoven fabric 58, the second reinforcement layer 59, the third nonwoven fabric 63, and the outer protective layer 64 may be formed while winding. Each layer constituting such a pipe P is formed by being continuously wound by a mandrel which rotates while moving little by little in the axial direction.

The inner passivation layer 51 and the outer passivation layer 64 may be formed of a resin material, and the inside of the inner passivation layer 51 and the outside of the outer passivation layer 64 may be formed in a manufacturing process so as to make a uniform surface. It may be wound by a release tape.

The pipe P formed as described above is not only improved in rigidity in the longitudinal direction and the radial direction by the composite fiber layer, but also retains its own elasticity, and thus does not have cracks or cracks due to impact. There is an advantage.

When the molding of the pipe P is completed, it is mounted on the roll R to be rotated and cut to a desired size by a grinding blade or a cutter C.

Figure 3 is a perspective view showing a process of connecting the branch pipe to the manhole body associated with the present invention, Figure 4 is a partial cross-sectional perspective view showing that the branch pipe and the ladder is coupled to the manhole body.

When the manhole body 10 is cut, a necessary structure is installed inside the manhole body 10. 4 shows that the ladder 80 is installed. The ladder 80 is fixed in the form of being attached to the inner wall of the manhole body 10. To this end, each support leg of the ladder 80 is provided with a coupling plate 81 that provides a sufficient area to be able to meet the inner wall of the manhole body 10. The portion of the inner wall of the manhole body 10 to which the coupling plate 81 is coupled is treated with a rough surface by sanding. Next, the bonding plate 81 is attached to the inner wall of the manhole body 10 by the bonding force of the surface fiber bonding layer 90 formed by impregnating the glass fiber into the resin.

Here, the surface fiber bonding layer 90 may be formed by the following method. First, a mat formed of glass fiber or the like is attached by using a resin along a portion between the coupling plate 81 and the inner wall of the manhole body 10 to temporarily fix the ladder 80. Glass fiber mats can be made by weaving several strands of fiber yarn in a longitudinal or transverse form or in the form of a nonwoven fabric. Next, a glass fiber mat or roving cloth is impregnated with the resin, and the impregnated glass fiber resin composite is repeatedly laminated to the bonding plate 81 to obtain a desired bonding force. Rollers and the like may be used for lamination, and a plurality of mats or roving cloths may be stacked to overlap each other. The surface fiber bonding layer 90 may be smoothly finished to prevent forming a complicated shape on the inner wall of the manhole body 10.

In this manner, the coupling plate 81 may secure a firm fixing force with the manhole body 10 by the surface fiber bonding layer of a material similar to that of the manhole body 10. And since resin and glass fiber are not easily corroded by sewage etc., the lifetime of the manhole 1 can be made semi-permanent.

When the ladder 80 is fixed to the manhole body 10, as shown in FIG. 3, boring holes 11A and 11B for coupling the branch pipe to the manhole body 10 are drilled. The drill D1 may be formed in a cylinder shape, and at the end thereof, a blade having a high hardness is attached to the manhole body 10. In this case, the center drill (D2) may be additionally provided to have a small diameter and protrude so that the drill (D1) to maintain the position in the drilling operation.

Next, the branch pipe 40 is coupled to the branch pipe holes 11A and 11B. The method of joining the branch pipes 40 is similar to forming the ladder 80 on the inner wall of the manhole body 10. The surface fibers are bonded by sanding, temporarily fixing, and laminating resin impregnated glass fiber mats or roving cloths. Combine through layers. Since the hardened surface fiber bonding layer 90 may have a rigidity of glass fibers together with watertightness and corrosion resistance of the resin material, there is an advantage over other branch pipe connecting methods.

Figure 5 is a perspective view showing the appearance of sanding as a preliminary work for coupling the manhole body associated with the present invention to the lower slab. Referring to FIG. 5, the portion 14 where the manhole body 10 is buried in the lower slab 20 is sanded on the surface so that the lower slab 20 may be firmly coupled. The sanding operation may be performed on both the outer wall surface and the inner wall surface of the manhole body 10.

Then, by using the same resin as the resin used in the production of the pipe P as shown in FIG. 2 as an adhesive, coarse sand can be sprayed and fixed on the surface of the portion 14 on which the manhole body 10 is to be buried. In addition, watertightness can be improved by fixing (winding) a water bio ring on the outside of the portion 14 buried in the manhole body 10.

Figure 6 is a perspective view showing the appearance of the manhole body and the lower slab formwork as a preliminary work for coupling the manhole body associated with the present invention to the lower slab. As shown in FIG. 6, the formwork M of the lower slab 20 is prepared to form the lower slab of reinforced concrete. In the formwork M, the first reinforcing bar 91 is arranged to secure the rigidity of the concrete.

At least one back muscle hole 15 is formed in a portion where the manhole body 10 is to be buried in the lower slab 20. The second rebar 92 passes through the reinforcement hole 15 and is installed. The second reinforcement 92 additionally secures the coupling force between the concrete and the manhole body 10 to prevent the manhole body 10 from generating a gap from the lower slab 20 due to impact or load.

At least one of the second reinforcing bars 92 may be provided in the manhole body 10, and FIG. 6 shows an example in which two pieces are crossed in a '+' shape. In addition, the second reinforcing bar 92 may be bent in any shape so as to secure a wider contact area after passing through the reinforcing hole 15 and being installed.

When the mold (M) and the manhole body 10 is placed in the reinforcement, the manhole body 10 is placed in the formwork M and filled with concrete to form a lower slab 20. In this case, an inverter may be additionally formed at a portion of the manhole body 10 to allow the sewage to flow in a predetermined direction between the branch pipe and the branch pipe from the bottom surface of the manhole body 10.

7 is a cross-sectional view of the manhole associated with the present invention. As shown in FIG. 7, the manhole body 10 is coupled to the lower slab 20 by adding a coupling force to the second reinforcement 92 of the concrete to a coupling force to the manhole body 10 of the concrete itself.

When the manhole body 10 and the lower slab 20 are combined, the upper slab 30 is formed to cover the upper part of the manhole body 10. Sealing means for securing the watertight between the upper slab 30 and the manhole body 10 may be provided between the upper slab 30 and the manhole body 10.

As described above, since the bonding force of the manhole body 10 to the lower slab 20 is increased, cracking occurs between the manhole body 10 and the lower slab 20 due to shaking or impact during the movement of the manhole 1. Not only can it be prevented, it is possible to prevent the leakage of water, etc. between the manhole body 10 and the lower slab 20 due to the change of ground conditions after construction.

The glass fiber reinforced plastic (GRP) manhole as described above is not limited to the configuration and method of the described embodiments, the embodiments are all or part of each embodiment is optional so that various modifications can be made It may be configured in combination.

1 is a perspective view showing the appearance of a glass fiber reinforced plastic (GRP) manhole according to the present invention.

Figure 2 is a perspective view showing a cutting step for forming a manhole body related to the present invention

Figure 3 is a perspective view showing a process of connecting the branch pipe to the manhole body associated with the present invention

Figure 4 is a partial cross-sectional perspective view showing that the branch pipe and the ladder is coupled to the manhole body

Figure 5 is a perspective view showing the appearance of sanding as a pre-operation for coupling the manhole body associated with the present invention to the lower slab

Figure 6 is a perspective view showing the appearance of the manhole body and the lower slab formwork as a preliminary work for coupling the manhole body associated with the present invention to the lower slab

Figure 7 is a cross-sectional view of the manhole associated with the present invention

※ Explanation of symbols for main parts of drawing

10: manhole body 11A, 11B: branch pipe hole

15: barley hole 20: lower slab

30: upper slab 40: branch pipe

91: first rebar 92: second rebar

Claims (10)

A manhole body in which the reinforcing fibers are laminated; And Is coupled to the lower portion of the manhole body, including a lower slab formed by reinforced concrete, the lower slab, A first reinforcing bar to provide rigidity to the concrete; And A second rebar disposed through the inner wall of the manhole body, The manhole body, An inner protective layer formed of a resin; A first nonwoven fabric formed to wind the inner protective layer; A first reinforcing layer laminated on the outside of the first nonwoven fabric and having resin impregnated in the unit fiber layer; A core layer laminated on the outside of the first reinforcing layer and having resin impregnated in the silica sand; A second reinforcing layer laminated on the outside of the core layer and having the resin impregnated in the unit fiber layer; A second nonwoven fabric disposed between the core layer and the second reinforcing layer; And A glass fiber reinforced plastic (GRP) manhole comprising a third nonwoven fabric formed to wind the second reinforcement layer. The method of claim 1, The glass fiber-reinforced plastic manhole, characterized in that the reinforcing hole is formed so that the second reinforcing bar passes through the manhole body buried in the concrete. The method of claim 2, The second reinforcing bar is formed of a plurality, the glass fiber reinforced plastic manhole, characterized in that arranged to cross each other. The method of claim 1, The second reinforcing bar is a glass fiber reinforced plastic manhole, characterized in that arranged in parallel to the first reinforcing bar. The method of claim 1, Glass-glass-reinforced plastic manhole, characterized in that the coarse sand by the resin is attached to the concrete portion of the manhole body. The method of claim 5, The glass fiber reinforced plastic manhole characterized in that the water expansion index ring is further fixed to the outside of the portion of the manhole body buried in the concrete. delete The method of claim 1, wherein the first reinforcing layer and the second reinforcing layer, A first unit fiber layer wound such that the fiber yarns are arranged parallel to the circumferential direction; And Fiberglass-reinforced plastic manhole, characterized in that each of the second unit fiber layer is wound so that the fiber yarn is arranged parallel to the longitudinal direction. Forming a manhole body formed by cutting a pipe formed by laminating reinforcing fibers; And coupling a lower slab to the manhole body, wherein the coupling of the lower slab comprises: Sanding a portion to be buried in the lower slab below the manhole body and forming a reinforcement hole at a predetermined position; Reinforcing the formwork with a first reinforcing bar to provide rigidity to the concrete; And Disposing the second reinforcing bar in the reinforcing hole; And Positioning the manhole body on the formwork and curing after filling the concrete to integrally couple the lower slab to the manhole body; The manhole body, An inner protective layer formed of a resin; A first nonwoven fabric formed to wind the inner protective layer; A first reinforcing layer laminated on the outside of the first nonwoven fabric and having resin impregnated in the unit fiber layer; A core layer laminated on the outside of the first reinforcing layer and having resin impregnated in the silica sand; A second reinforcing layer laminated on the outside of the core layer and having the resin impregnated in the unit fiber layer; A second nonwoven fabric disposed between the core layer and the second reinforcing layer; And A method of manufacturing a glass fiber reinforced plastic (GRP) manhole comprising a third nonwoven fabric formed to wind the second reinforcement layer. 10. The method of claim 9, Wherein the manhole body is buried in the concrete manufacturing method of the glass fiber reinforced plastic manhole, characterized in that the reinforcing hole is formed so as to pass through the second reinforcing bar.

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