KR102520087B1 - Modular assembly non-excavation reinforcement method of underground conduit with improved light weight, corrosion resistance and durability using high-performance FRP composite and multi-functional mortar - Google Patents

Abstract

The present invention relates to a module-assembling non-excavation reinforcement method of an underground conduit with improved lightweightness, corrosion resistance, and durability using a high-performance FRP composite and multi-functional mortar and, more specifically, to a module-assembling non-excavation reinforcement method of an underground conduit with improved lightweightness, corrosion resistance, and durability using a high-performance FRP composite and multi-functional mortar, which uses an FRP composite to reinforce a target to increase chemical resistance as a composite product of a high-strength thermosetting resin and various reinforcing fibers to be suitable for use as a reinforcing material of an ordinary concrete structure and a target (a sewer pipe, a sewer culvert, a filtration plant, a wastewater treatment plant, a bridge, a column of a building, etc.) in an environment with a possibility of exposure to acid and reduce friction to lower the stagnation of sediment and reduce travel time to ultimately increase the coefficient of roughness to secure a flow velocity.

Description

Modular assembly non-excavation reinforcement method of underground conduit with improved light weight, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar performance FP composite and multi-functional mortar}

The present invention relates to a modular assembly-type non-drilling reinforcement method for underground conduits with improved light weight, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar, and more specifically, by using FRP composites to reinforce high-strength thermosetting resins. As a composite product of various reinforcing fibers and chemical resistance, it is a reinforcing material for general concrete structures as well as objects in the environment that may be exposed to acid (sewer pipe, sewage culvert, water treatment plant, wastewater treatment plant, bridge bridge, pillar of building, etc.) It is suitable for use, reduces the stagnation of sediment by reducing frictional force, reduces the congestion time, and ultimately increases the roughness coefficient to secure the flow rate. It relates to a modular assembly type non-drilling reinforcement method.

Currently, the pace of global climate change is rapidly developing, and carbon reduction and carbon neutrality are becoming hot topics all over the world. However, the current situation of water supply and sewage in Korea is at a poor level.

In particular, in the case of direct input of manure or generalization of the disposer, the biggest problem is that the flow rate is not secured due to the old conduit and the inaccuracy of the design, rather than the problem of the capacity and efficiency of the water and sewage facilities.

Several methods have been tried for this problem.

For example, in the case of reinforcement of general structures and underground structures, the steel plate reinforcement method was used as a repair and reinforcement method to improve reinforcement performance, but there was a limit to its application in the case of underground structures with high humidity due to the corrosiveness of the steel plate, and fiber sheet reinforcement etc. have shown a problem in which the integration with the structure is remarkably degraded over time.

In addition, in the case of the pipeline non-drilling method using impregnated tubes, there have been problems such as the vulnerability of the joint being exposed and the intrusion of water over time, resulting in cracks or subsidence, especially in the case of partial repairs. has been shown to be serious.

Recently, reinforcement methods using fiber reinforced plastics (FRP) for structures have been developed and used in various forms, and physical properties such as high durability, high specific stiffness and strength, and corrosion resistance are being developed and improved in various forms. .

Accordingly, in the present invention, when reinforced using an FRP composite, it is a composite product of high-strength thermosetting resin and various reinforcing fibers, which increases chemical resistance to objects in environments that may be exposed to acids (sewer pipes, sewage culverts, water purification plants) as well as general concrete structures. , wastewater treatment plants, bridges, pillars of buildings, etc.), it is suitable for use as a reinforcing material, and it is intended to provide a technology that can secure flow velocity by reducing the frictional force to lower the stagnation of sediment and reduce the arrival time, ultimately increasing the roughness coefficient. .

As a technology related to this, Korean Patent Application Application No. 10-2005-0099440 (2005.10.21) "Conduit non-drilling mortar lining and compression repair/reinforcement method" is a fiber-reinforced sheet excluding glass fibers and a water-repellent cement mortar. Composed mortar lining reinforcement, joint filling reinforcement in which water-stop cement mortar or resin mortar is filled in a tubular water-permeable cover, or joint filling reinforcement in which water-stop cement mortar or resin mortar is adsorbed to fiber reinforcement excluding rod-shaped glass fibers are wrapped around the rubber tube of the repair mechanism, and then the repair mechanism and the reinforcing material are integrally moved to the joint to be repaired or the cavity of the damaged part of the pipeline, and then a predetermined air pressure is injected into the rubber tube of the repair mechanism. It relates to the non-drilling mortar lining and compression repair/reinforcement method for pipelines that are hardened and repaired. The inner surface of the reinforcing material is smooth, the thickness is uniform, workability is improved, and economical construction is possible due to the reduction of repair costs, and the environment In the case of the embodiment in which the reinforcing material is harmless from a technical point of view and the joint filling is applied, the reinforcing material does not protrude into the inner surface of the abnormal part of the pipeline to be repaired, thereby providing an effect of not reducing the cross section of the passage through which sewage flows.

In addition, Republic of Korea Patent Application Application No. 10-2016-0024300 (2016.02.29) "The repairing and reinforcement method for a deteriorated server pipe by non- excavation and that apparatus" consumes fuel for steam generation while reducing construction time when repairing and reinforcing by injecting steam into the reinforcing member supplied in the form of a tube on the inner wall surface and expanding it at high temperature and high pressure without replacing the aged sewage pipe line. It is about technology to reduce

In addition, Republic of Korea Patent Application Application No. 10-2021-0029277 (2021.03.05) "Non-excavation repair and reinforcement method of old pipeline using light-curing tube and light-curing tube used therein (NON-EXCAVATION TYPE REPAIRING AND REINFORCEMENT METHOD FOR DETERIORATED PIPE LINE USING PHOTOCURING TUBE, AND PHOTOCURING TUBE USED THEREFOR)" provides a non-drilling repair and reinforcement method that minimizes damage to light-curing tubes during repair and reinforcement of old pipelines. Step 1 to install; a second step of inserting a light irradiation device into the photocuring tube and combining one side packer and the other side packer; a third step of inflating the photocuring tube by injecting air; a fourth step of curing the photocuring tube by moving the light irradiation device; Step 5 of withdrawing the one side packer, the other side packer, and the light irradiation device to the outside, wherein the photocuring tube includes a glass fiber composite layer impregnated with a photocurable resin, a resin layer on an inner circumferential surface of the glass fiber composite layer, and a number of It relates to a technique comprising an inner foil on the inner surface of the stratum and an outer barrier layer on the outer circumferential surface of the glass fiber composite layer.

In addition, Republic of Korea Patent Application Application No. 10-2015-0075154 (May 28, 2015) "METHOD FOR REPAIRRING AND REINFORCING PIPE LINES WITH NON-EXCAVATION" relates to the repair and reinforcement method of water and sewage pipes. , The impregnated tube impregnated with a commonly used epoxy or unsaturated polyester resin is expanded in an atmosphere at room temperature or in an atmosphere containing some moisture to maintain close contact with the impregnated tube inside the water supply and sewage pipes and to make the resin harden in the first phase It relates to a water and sewage pipe non-drilling repair and reinforcement method that creates a synthetic resin regeneration pipe inside the sewer pipe.

However, these technologies are reinforced by using FRP composites, which are composite products of high-strength thermosetting resin and various reinforcing fibers, which increase chemical resistance, so that not only general concrete structures but also objects in environments that may be exposed to acid (sewer pipes, sewage culverts, water purification plants, It is suitable for use as a reinforcing material for wastewater treatment plants, bridges, pillars of buildings, etc.), and the ultimate purpose of the present invention is to reduce the frictional force, lower the stagnation of sediment, reduce the arrival time, and ultimately increase the roughness coefficient to secure the flow rate. There are limitations that cannot be provided.

Republic of Korea Patent Application Application No. 10-2005-0099440 (October 21, 2005) “Conduit Non-Drilling Mortar Lining and Compression Repair and Reinforcement Method” Republic of Korea Patent Application Application No. 10-2016-0024300 (2016.02.29) "The repairing and reinforcement method for a deteriorated server pipe by non- excavation and that apparatus" Republic of Korea Patent Application Application No. 10-2021-0029277 (2021.03.05) "Non-excavation repair and reinforcement method of old pipeline using light curing tube and light curing tube used therein (NON-EXCAVATION TYPE REPAIRING AND REINFORCEMENT METHOD FOR DETERIORATED PIPE LINE USING PHOTOCURING TUBE, AND PHOTOCURING TUBE USED THEREFOR)" Republic of Korea Patent Application Application No. 10-2015-0075154 (2015.05.28) "METHOD FOR REPAIRRING AND REINFORCING PIPE LINES WITH NON-EXCAVATION"

The present invention is to solve the above problems, by reinforcing using an FRP composite, as a composite product of high-strength thermosetting resin and various reinforcing fibers, increasing chemical resistance, not only general concrete structures but also objects in environments that may be exposed to acid (Sewer pipe, sewage culvert, water treatment plant, wastewater treatment plant, bridge bridge, building column, etc.) for use as a reinforcing material for underground conduit modules with improved lightweight, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar It is to provide an assembly-type non-digging reinforcement method.

In addition, the present invention is an underground conduit with improved lightweight, corrosion resistance, and durability using high-performance FRP composites and multifunctional mortar to secure flow velocity by reducing frictional force, lowering the stagnation of sediment, reducing convection time, and ultimately increasing the roughness coefficient. It is to provide a modular assembly type non-drilling reinforcement method.

However, the objects of the present invention are not limited to the above-mentioned objects, and other objects not mentioned will be clearly understood by those skilled in the art from the description below.

In order to achieve the above object, the modular assembly type non-drilling reinforcement method of underground conduit with improved lightness, corrosion resistance and durability using high-performance FRP composite and multifunctional mortar according to an embodiment of the present invention is to perform pipe cleaning and dredging. Step 1; A second step of conducting a pipeline survey; The third step of pre-processing; And a fourth step of installing a high-performance FRP composite frame 100 made of an annular frame connecting the cylindrical frames to each other along the pipe inside the pipe in an outward direction; It is characterized in that it includes.

At this time, the present invention, after the fourth step, a fifth step of inserting a high-performance FRP composite circular bar 200 formed adjacently between the cylindrical frames of the high-performance FRP composite frame 100 in a cylindrical shape in the annular frame; It may be characterized in that it further comprises

In addition, in the present invention, after the fifth step, the high-performance FRP composite frame 100 and the high-performance FRP composite round bar 200 are formed along the annular frame to the inside of the high-performance FRP composite frame 100. A sixth step of installing the dragon panel 300; It may be characterized in that it further comprises

In addition, the present invention, after the seventh step, seals the pipe inlet and outlet, and mortar is applied to the space between the high-performance FRP composite frame 100 and the finishing panel 300, and the space between the outside of the high-performance FRP composite frame 100 and the pipe line. an eighth step of injecting (400); It may be characterized in that it further includes.

In addition, the present invention, after the eighth step, the ninth step of completing the construction; It may be characterized by including.

The modular assembly-type non-drilling reinforcement method for an underground conduit with improved light weight, corrosion resistance and durability using a high-performance FRP composite and multifunctional mortar according to an embodiment of the present invention is reinforced using a high-strength thermosetting resin and various reinforcements by using an FRP composite. As a composite product of fiber, it is suitable for use as a reinforcing material for general concrete structures as well as objects in environments that may be exposed to acid (sewer pipes, sewage culverts, water purification plants, wastewater treatment plants, bridge bridges, pillars of buildings, etc.) as well as general concrete structures by increasing chemical resistance. can make it

In addition, the modular assembly-type non-drilling reinforcement method for underground conduits with improved light weight, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar according to another embodiment of the present invention reduces frictional force, lowers the stagnation of sediment, and By reducing , the roughness coefficient ultimately increases, so there is an effect of securing the flow velocity.

1 is a view for explaining the configuration of an FRP composite fiber 10 used in a modular assembly type non-drilling reinforcement method of an underground conduit with improved light weight, corrosion resistance, and durability using a high-performance FRP composite material and multifunctional mortar.
2 and 3 are flow charts showing the construction process of the modular assembly type non-drilling reinforcement method of an underground conduit with improved light weight, corrosion resistance and durability using a high-performance FRP composite and multifunctional mortar according to an embodiment of the present invention.
4 and 5 are views showing the structure according to the construction process of the modular assembly-type non-drilling reinforcement method for underground conduits with improved light weight, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar according to an embodiment of the present invention. .
6 to 8 are detailed views of the BOX-type high-performance FRP composite reinforcement.

Hereinafter, a detailed description of preferred embodiments of the present invention will be described with reference to the accompanying drawings. In the following description of the present invention, if it is determined that a detailed description of a related known function or configuration may unnecessarily obscure the subject matter of the present invention, the detailed description will be omitted.

Table 1 below shows the scope of application of the module assembly type non-drilling reinforcement method for underground conduits with improved light weight, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar.

division detail note Applicable pipe species Concrete pipe, cast iron pipe, steel pipe Applicable tube irrigation 800 to 3,000mm Open channel, culvert type 800 to 10,000mm Reinforcement possible range Front with top, bottom and haunch partially possible

Looking at the high-performance FRP composites (for circular pipelines and box-type culverts common) used in the module assembly type non-drilling reinforcement method of underground conduits with improved light weight, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar, the composition is frame (frame), connecting material, and reinforcing circular rods.

The characteristics of these high-performance FRP composites are: 1) excellent corrosion resistance and acid resistance, 2) light weight and high specific strength, 3) excellent heat resistance and heat insulation, and 4) no elution of metal theory (Ion).

Looking at the characteristics of light weight and high specific strength, the specific strength is equal to or higher than that of steel, but the weight is much lighter, so it is possible to achieve equivalent or higher physical properties and weight reduction only by manufacturing FRP without reinforcing metal materials.

And, looking at the characteristics of excellent heat resistance and heat insulation, because of its low thermal conductivity, it is excellent in keeping warm and cold and can be used at high temperatures.

In addition, looking at the absence of elution of metal theory (Ion), in the case of a reinforcing material made of a corrosion-resistant resin, since metal ions do not elute, there is no problem of quality degradation due to metal ions.

Next, the characteristics of the high-performance FRP composite materials used in the modular assembly-type non-drilling reinforcement method of underground conduits with improved light weight, corrosion resistance, and durability using high-performance FRP composite materials and multi-functional mortar are examined.

First, ① physical properties of the corrosion-resistant resin (corrosion-resistant unsaturated polyester) have characteristics shown in Table 2 below.

Specific Gravity 25℃ 1.03-1.07 Viscosity Poise/25℃ 1.5 - 3.5 Gelation time (minutes) 16 - 20 Minimum curing time (minutes) 22 - 30

In terms of corrosion resistance, it does not corrode even when corrosive liquids penetrate, such as alkali solutions such as caustic soda, various acids, organic compounds, and solvents, and has performance equivalent to super-corrosion resistant materials such as titanium and Hastelloy.

Next, the configuration of the FRP composite fiber 10 is the same as in FIG.

That is, the FRP composite fiber 10 is composed of polyethylene yarns 11 spaced apart in a row, and the network spacing is adjusted between 1 and 60 mm, and the high-performance reinforcing fiber yarns 12 are orthogonal to the polyethylene yarns 11. It may be formed of carbon fiber, aramid, basalt fiber, etc. according to the required durability and conditions with the same manganese spacing adjusted between 1 and 60 mm.

Physical properties of the high-performance FRP composite using the FRP composite fiber 10 formed as described above are shown in Table 3 below.

Tensile strength kgf/mm ² 12.5 ASTM D 638 tensile modulus kgf/mm ² 1,074 flexural strength kgf/mm ² 19.0 ASTM D 790 flexural modulus kgf/mm ² 85.5

*2. 55% MEKPO 1.0 PHR, P-VN 0.5 PHR

Post Cure : 80℃×2hrs + 120℃×2hrs

In the high-performance FRP composite, 7 to 10 parts by weight of nanocellulose fibers and 5 to 7 parts by weight of an impregnated resin may be added as additional components based on 100 parts by weight of the FRP composite fiber 10.

The nano-cellulose fibers added here serve as a bonding agent between the FRP composite fibers 10 and the mortar, as well as between the FRP composite fibers 10, and prevent cracks due to curing heat generated during mixing, thereby extending the life of the composition. . In addition, the nanocellulose fibers are mixed with the FRP composite fibers 10 to improve waterproof performance, and form a structure by reacting with the cured product produced during curing to prevent cracking and improve tensile strength and chemical resistance.

In addition, in addition to the FRP composite fiber 10, the powder resin includes 3 to 4 parts by weight based on 100 parts by weight of the FRP composite fiber 10, and the included powder resin may be selected from latex, silicone, and waste tire rubber, , The powdered resin reacts flexibly to deformation such as impact, vibration, and thermal deformation inside the structure, torsion, etc., which may be applied to the cured structure in the composition, and resists the impact and deformation, thereby minimizing lifting and falling off of the cured product.

If the powdered resin is less than 3 parts by weight based on 100 parts by weight of the FRP composite fiber 10 powder, the flexibility of the composition may be lowered and the ability to withstand temperature change and impact resistance may be deteriorated, and if it exceeds 4 parts by weight, the adhesive strength and strength of the composition Since may fall, the composition ratio of the powder should be paid attention to the range suggested in the present invention.

Next, a “finishing panel” corresponding to the finishing panels 300 and 200a to be described later will be described.

As the material of the finishing panel, at least one of translucent acrylic, translucent PVC, translucent urethane, and embodiments to be described later may be selected according to circumstances.

As a specific embodiment of the finishing panel according to the present invention, it is formed by mixing polystyrene (preferably having a weight average molecular weight of 10,000 to 200,000) and a styrene monomer, and 50 to 60 parts by weight of the styrene monomer based on 30 parts by weight of the polystyrene resin. You can use what has been created. For example, it is more preferably formed by mixing granular polystyrene resin and styrene monomer at a ratio of 30:55, the viscosity is about 33 (25° C., ps), and the appearance is preferably formed in a transparent state.

In addition, in the present invention, in order to improve resistance to strong acids such as sulfuric acid, hydrochloric acid, and nitric acid in the finishing panel, 1 to 2 parts by weight of the acid resistance reinforcing agent based on 100 parts by weight of polystyrene and styrene monomer constituting the entire panel may be additionally used. all.

In addition, the acid resistance enhancer in the present invention is a resin component consisting of 30 to 40 parts by weight of SBR (Styrene-Butadiene rubber) rubber and 1 to 15 parts by weight of hydroxyl acrylate monomer based on 100 parts by weight of unsaturated polyester resin and diatomaceous earth 100 Based on parts by weight, it includes an inorganic component consisting of 30 to 40 parts by weight of titanium dioxide, 20 to 30 parts by weight of calcium carbonate, and 20 to 35 parts by weight of mica, wherein the resin component forms a hollow sphere, and the resin component is used as the inorganic component. It is preferable to use those in which the components are externally surrounded to form a bead shape.

In the present invention, it is preferable to use a resin having a solid content of 50% or more in order to maintain elasticity of the SBR rubber. An ethylene glycol-based dihydric alcohol may be used as the solvent.

The hydroxyl acrylate monomer assists rubber performance and functions to exhibit long-term acid resistance. As such a hydroxyl acrylate monomer, hydroxyl ethyl acrylate, hydroxyl propyl acrylate, hydroxyl ethyl methyl acrylate and the like can be used.

The unsaturated polyester is formed by condensation polymerization of an acid and a glycol compound, and for example, one formed by reacting fumaric acid with diethylene glycol and having an acid value in the range of 18 to 20 mg/KOH may be used. The unsaturated polyester serves to enhance acid resistance.

In the present invention, the titanium dioxide is used to improve acid resistance.

In the present invention, the mica functions to improve water resistance and acid resistance.

In the present invention, the calcium carbonate functions to improve wear resistance and acid resistance.

In the present invention, the diatomaceous earth serves to improve anti-condensation properties and adhesion.

In the present invention, the resin component exerts acid resistance performance, and the inorganic component serves to further increase acid resistance by enclosing the resin component from the outside to make the structure dense.

In addition, an anti-freeze additive may be further included to prevent hardening of the panel in winter.

In the present invention, the antifreeze adjuvant is used to improve cold resistance, and specifically, based on 100 parts by weight of calcium formate, 20 to 30 parts by weight of caproic acid, 15 to 24 parts by weight of propyl cellosolve, and 1 to 2 parts by weight of urea. made can be used.

The potassium formate is a raw material that gives an antifreeze effect, and also provides a strength enhancing effect.

In addition, the profile cellosolve provides effects of improving lubricating properties and immobility, preventing frost damage, and improving workability.

In addition, the caproic acid serves to improve physical properties and improve cold resistance by making the structure of the composition dense.

In addition, the urea is a non-chlorinated and non-alkali type, which dissolves in water and exhibits a freezing point enhancing effect, and exhibits a hardening inhibiting function together with the caproic acid so that antifreeze performance is exhibited.

The physical properties of the above-described finishing panel are shown in Table 4 below.

Tensile strength MPa 40 ASTM D 638 tensile modulus kgf/mm ² over 1,000

Next, the characteristics of the "multifunctional mortar" corresponding to the mortars 400 and 300a to be described later will be described.

The multifunctional mortar has excellent fire resistance, water inseparability, early strength, and impact resistance.

Looking at the materials used and functionality of the multifunctional mortar are as follows.

In the present invention, the multifunctional mortar is 100 parts by weight of cement, 1 to 35 parts by weight of aluminum cement, 1 to 20 parts by weight of silica sand, 5 to 30 parts by weight of polymer, and 0.1 to 20 parts by weight of reinforcing fibers. Naphtha-based high flow agent (powder, fluidity enhancement), 0.1 to 20 parts by weight of each melamine-based high flow agent, 1.1 to 10 parts by weight of a hardening accelerator, 0.5 to 12 parts by weight of each of a shrinkage reducing agent and an expansion agent, and 5 to 15 parts by weight of a thickener It is characterized in that it is formed by mixing.

1. Cement (usually Portland cement)

2. Alumina Cement - Improved fire resistance

3. Silica sand 8. Silica sand (No. 5, No. 6, about 0.6~1.2mm)

4. Vinyl acetic acid-based polymer and acrylic-based re-emulsifying polymer (increased old and new adhesion and reduced rebound)

5. Reinforcing fibers - increase in flexural strength and reduce cracks (nylon, PP, PAN, etc.)

6. Naphtha-based high flow agent (powder, fluidity enhancement), melamine-based high flow agent (powder, thickening and fluidity enhancement) - water inseparability

7. Hardening accelerator (lithium carbonate, calcium formate) - Improves early strength

8. Shrinkage reduction material and expansion material (K type)

9. Thickener (acrylic, cellulose thickener, starch-based combined use) and antifoaming agent - Adjusted according to insolubility in water

We look at the performance of the main materials used in multifunctional mortar.

1) Cement and mixtures

Cement and mixtures can be manufactured by appropriately using OPC (Portland cement) in general, early strength cement and alumina cement, and silica fume if high strength is required, in consideration of site conditions.

2) Reinforcing Fiber

In the present invention, PP-FIBER, nylon fiber, and natural arbocell fiber are appropriately mixed and used.

This is achieved by maximizing the strengths of each fiber and considering the tensile strength, bending strength, and rebound amount, and it would be desirable to adjust it according to the site situation.

3) Polymer

In the present invention, a special acrylic re-emulsification resin and a vinyl acetic acid-based resin for waterproofing and increasing adhesion are used.

When general EVA resin is mixed with cement, the adhesiveness is good, but the curing time is slow and the water resistance is poor. The special acrylic re-emulsification water used in the present invention can be properly mixed with the above materials to further increase adhesiveness, reduce curing time, and secure high water resistance.

In the manufacturing method, it is prepared by adding 1 to 5% of ETHYLENE GLYCOL to acrylic resin, which is well soluble in water and has a low freezing point (-13 ℃) and high boiling point (197.2 ℃) to prevent freezing in winter and prevent rapid evaporation of moisture. Minimize cracking of mortar as much as possible.

The thickener, which plays the greatest role of the separation reducing material, is largely divided into two types: a cellulose-based water-soluble polymer and an acrylic-based water-soluble polymer. It is preferable to add a setting control accelerator, an antifoaming agent, a dispersing agent, etc. as other auxiliary components.

4) thickener

Acrylic-based thickeners are mainly composed of polyacrylamide, and have the advantage of low setting delay and low bubble generation, but have the disadvantage that workability significantly deteriorates over time. can be used by

When using such a thickener, bubbles are generated, so it is essential to use an antifoaming agent to maintain an appropriate amount of air. Therefore, use a good antifoaming agent that is friendly to the type of thickener.

In the manufacture of water-inseparable mortar, the use of a fluidizing agent is essential for fluidity and workability.

Melamine selphonic acid, polycarboxylic acid, etc. are used. Depending on the type of thickener, cellulose has good affinity with melamine selphonic acid or polycarboxylic acid. A carbonic acid type may be appropriate.

When used, it affects the setting time, so appropriately use setting time regulators such as accelerators.

The physical performance of the multifunctional mortar is shown in Table 5 below.,

test name unit measurement result standard Compressive strength 28 days MPa 52.6 KS F 4042 Bending strength 28 days MPa 13.5 KS F 4042 adhesion strength MPa 1.8 KS F 4042

Next, look at the "construction process chart".

2 is a flow chart showing a modular assembly-type non-drilling reinforcement method for an underground conduit with improved light weight, corrosion resistance, and durability using a high-performance FRP composite and multifunctional mortar according to a first embodiment of the present invention, and FIG. 4 shows its structure It is a drawing for explanation.

Referring to Figures 2 and 4a, look at the construction process of the modular assembly type non-drilling reinforcement method for underground conduits with improved lightness, corrosion resistance and durability using high-performance FRP composites and multifunctional mortar according to the first embodiment of the present invention see.

Referring to Figures 2 and 4a, pipe cleaning and dredging (S11), pipe survey (S12) to perform the state of the pipe through a preliminary survey (visual survey, CCTV survey), pretreatment work (S13), along the outer direction Installation of a high-performance FRP composite frame 100 consisting of an annular frame connecting the cylindrical frame and the cylindrical frame along the pipe inside the pipe (S14), between the cylindrical frames of the high-performance FRP composite frame 100 in a cylindrical shape in the annular frame The high-performance FRP composite circular bar 200 formed adjacent to (S15), the high-performance FRP composite frame 100 and the high-performance FRP composite circular bar 200 are formed to the inside of the high-performance FRP composite frame 100 to the inside of the annular Installation of the finishing panel 300 formed along the frame (S16), sealing of the pipe inlet and outlet, space between the high-performance FRP composite frame 100 and the finishing panel 300, and between the outside of the high-performance FRP composite frame 100 and the pipe It may be made in the order of mortar 400 injection into the space of (S17), and construction completion (S18).

Here, a conduit (circular 800 to 3000 mm) (conduit reinforcement structure diagram (1)) can be used.

Figure 4b shows a high-performance FRP composite frame 100 and a high-performance FRP composite circular rod 200 inserted view.

In another embodiment of the present invention, the pretreatment operation (S13) is a method of further enhancing acid resistance by inserting an impregnated tube into the conduit, and the impregnated tube contains 100 parts by weight of an impregnated resin, 1 to 35 parts by weight of an alumina compound, ceramic 1 to 20 parts by weight of powder, 5 to 30 parts by weight of a shrinkage reducing agent, 0.1 to 20 parts by weight of an acid resistance enhancer, and 5 to 15 parts by weight of a curing agent are mixed and formed by inserting an impregnated resin composition into a tube.

3 is a flow chart showing a modular assembly-type non-drilling reinforcement method for an underground conduit with improved lightness, corrosion resistance and durability using a high-performance FRP composite and multifunctional mortar according to a second embodiment of the present invention, and FIG. 5 shows its structure As a drawing for explanation, it is similar to the process of FIGS. 2 and 4, but the difference will be mainly described.

Next, referring to FIGS. 3 and 5, in the construction process of the modular assembly type non-drilling reinforcement method of the underground conduit with improved lightness, corrosion resistance and durability using the high-performance FRP composite and multifunctional mortar according to the second embodiment of the present invention take a look about

3 and 5, pipe cleaning and dredging (S21), pipe investigation (S22), pretreatment work (S23), connection between the triangular protruding frame and the cylindrical frame along the inside of the pipe along the inner direction Installation of a high-performance FRP composite frame 100a consisting of a straight frame (S24), installation of a straight high-performance FRP composite connector (not shown) interconnecting between triangular protrusions in the inward direction (S25), high-performance FRP composite frame 100a High-performance FRP composite round bar (not shown) formed adjacently between the protruding frames (S26), high-performance FRP composite frame 100 and high-performance FRP composite round bar 200 are formed inside the high-performance FRP composite frame 100 Installation of the finishing panel (200a) formed along the annular frame to the inside (S27), sealing of the pipe inlet and outlet and between the high-performance FRP composite frame 100 and the finishing panel 300, and the outside of the high-performance FRP composite frame 100 Mortar (300a) injection into the space between the and the pipe (S28), and may be made in the order of construction completion (S29).

Here, the BOX type (culvert, opening, culvert 800 ~ 10,000mm) (1a) can be used, and FIG. 3 is a detailed view of the BOX type high-performance FRP composite reinforcement as a BOX type reinforcement structure diagram.

6 to 8 are detailed views of the BOX-type high-performance FRP composite reinforcement.

More specifically, FIG. 6 shows a plan view ( FIG. 6A ), a front view ( FIG. 6B ), and a side view ( FIG. 6C ) of a high-performance FRP composite frame 100a.

7 shows a front view (FIG. 7a), side view (FIG. 7b), front view (FIG. 7c), and side view (FIG. 7d) of the finishing panel 200a.

8 shows a front view (FIG. 8a) and a side view (FIG. 8b) in which the high-performance FRP composite frame 100a and the finishing panel 200a are fastened.

In another embodiment of the present invention, by embedding the IoT communication module and the humidity sensor together between the high-performance FRP composite frame 100a and the finishing panel 200a, and between the high-performance FRP composite frame 100a and the conduit, the management server It is possible to manage the maintenance period for the low shrinkage type non-drilling impregnated tube with excellent acid resistance.

That is, the IoT communication module and humidity sensor, which are the first IoT module formed between the high-performance FRP composite frame (100a) and the finishing panel (200a), and the second IoT module, IoT communication, formed between the high-performance FRP composite frame (100a) and the conduit The management server collects the first sensing information and the second sensing information through the communication network connected to the IoT gateway using the module and the humidity sensor, and the first sensing information and the second sensing information are collected according to the change in the difference value of the collected sensing information. When the first threshold change and the second threshold change respectively set in occur, the management server may provide sensing information to the maintenance manager terminal through the communication network along with the management identification number of each IoT module for maintenance.

As described above, preferred embodiments of the present invention have been disclosed in the present specification and drawings, and although specific terms have been used, they are only used in a general sense to easily explain the technical content of the present invention and help understanding of the present invention. However, it is not intended to limit the scope of the present invention. It is obvious to those skilled in the art that other modified examples based on the technical spirit of the present invention can be implemented in addition to the embodiments disclosed herein.

10: FRP composite fiber 11: polyethylene yarn
12: high-performance reinforcing fiber yarn

Claims (5)

A first step of pipe cleaning and dredging;
A second step corresponding to a pipeline survey of conducting a preliminary survey (at least one of a visual survey and a CCTV survey) to perform a pipeline state;
Impregnated resin formed by mixing 100 parts by weight of impregnation resin, 1 to 35 parts by weight of alumina compound, 1 to 20 parts by weight of ceramic powder, 5 to 30 parts by weight of shrinkage reducing agent, 0.1 to 20 parts by weight of acid resistance enhancer, and 5 to 15 parts by weight of curing agent A third step of inserting the composition into the tube to form an impregnated tube, and then inserting the impregnated tube into the conduit to further enhance acid resistance, thereby performing a pretreatment operation;
Install a high-performance FRP composite frame 100 made of an annular frame connecting cylindrical frames and cylindrical frames along the conduit inside the conduit along the outward direction,
The FRP composite fiber 10 used in the high-performance FRP composite frame 100 is composed of polyethylene yarns 11 spaced apart in a row, and the network spacing is adjusted between 1 and 60 mm, and the high-performance reinforcing fiber yarn 12 is a polyethylene yarn. It is formed of at least one of carbon fiber, aramid, and basalt fiber with the same network spacing adjusted between 1 and 60 mm in a direction orthogonal to (11),
The high-performance FRP composite using the FRP composite fiber 10 is formed by adding 7 to 10 parts by weight of nanocellulose fibers and 5 to 7 parts by weight of an impregnating resin as additional components based on 100 parts by weight of the FRP composite fiber 10,
In addition to the FRP composite fiber 10, the powder resin includes 3 to 4 parts by weight based on 100 parts by weight of the FRP composite fiber 10, and the included powder resin is selected from latex, silicone, and waste tire rubber. A fourth step;
A fifth step of inserting a high-performance FRP composite circular bar 200 formed adjacent to the cylindrical frame of the high-performance FRP composite frame 100 in a cylindrical shape in the annular frame;
A sixth step of installing the finishing panel 300 formed along the annular frame to the inside of the high-performance FRP composite frame 100 to the inside of the high-performance FRP composite frame 100 and the high-performance FRP composite round bar 200 formed;
A seventh step of injecting mortar 400 into the space between the pipe inlet and outlet sealing and the high-performance FRP composite frame 100 and the finishing panel 300, and the space between the outside of the high-performance FRP composite frame 100 and the pipe; and
An eighth step corresponding to construction completion; Including,
Acid resistance using a management server, including an additional step of embedding the IoT communication module and humidity sensor together between the high-performance FRP composite frame (100a) and the finishing panel (200a), and between the high-performance FRP composite frame (100a) and the conduit, respectively. Manage the maintenance period for this excellent low-shrinkage non-drilling impregnated tube,
The IoT communication module and humidity sensor, which are the first IoT module formed between the high-performance FRP composite frame (100a) and the finishing panel (200a), and the IoT communication module, which is the second IoT module formed between the high-performance FRP composite frame (100a) and the conduit The management server collects the first sensing information and the second sensing information through the communication network connected to the IoT gateway using the humidity sensor, and the first sensing information and the second sensing information are respectively collected according to the change in the difference value of the collected sensing information. When the set first threshold change and second threshold change occur, the management server provides sensing information to the maintenance manager terminal through the communication network along with the management identification number of each IoT module for maintenance,
The "finishing panel" corresponding to the finishing panel (300, 200a) is,
It is formed by mixing polystyrene (weight average molecular weight 10,000 to 200,000) and styrene monomer, and is produced by mixing 50 to 60 parts by weight of styrene monomer based on 30 parts by weight of polystyrene resin, and granular polystyrene resin and styrene monomer in a ratio of 30:55 It is formed by mixing in a ratio, and in order to improve the acid resistance of the panel for finishing, an acid resistance reinforcing agent is additionally used in an amount of 1 to 2 parts by weight based on 100 parts by weight of polystyrene and styrene monomer constituting the entire panel,
The acid resistance enhancer is a resin component composed of 30 to 40 parts by weight of SBR (Styrene-Butadiene rubber) rubber and 1 to 15 parts by weight of hydroxyl acrylate monomer based on 100 parts by weight of unsaturated polyester resin and titanium dioxide based on 100 parts by weight of diatomaceous earth It includes an inorganic component consisting of 30 to 40 parts by weight, 20 to 30 parts by weight of calcium carbonate, and 20 to 35 parts by weight of mica, the resin component forms a hollow sphere, and the inorganic component surrounds the resin component from the outside to make beads. Use what makes up the shape,
SBR rubber uses a resin with a solid content of 50% or more to maintain elasticity, and uses ethylene glycol-based dihydric alcohol as a solvent.
The hydroxyl acrylate monomer uses at least one of hydroxyl ethyl acrylate, hydroxyl propyl acrylate, and hydroxyl ethylmethyl acrylate,
In order to prevent hardening of the finishing panel in winter, an anti-freezing additive is further included, but the anti-freezing auxiliary agent is based on 100 parts by weight of calcium formate, 20 to 30 parts by weight of caproic acid, 15 to 24 parts by weight of propyl cellosolve, and element 1 to 2 parts by weight is used,
Use at least one of translucent acrylic, translucent PVC, and translucent urethane as another material for the finishing panel,
"Multifunctional mortar" corresponding to the mortar 400,
100 parts by weight of cement, 1 to 35 parts by weight of aluminum cement, 1 to 20 parts by weight of silica sand, 5 to 30 parts by weight of polymer, 0.1 to 20 parts by weight of reinforcing fiber, naphtha-based high fluidizing agent (powder, fluidity enhancement), unique to melamine High-performance FRP composite and multifunctional mortar, characterized in that it is formed by mixing 0.1 to 20 parts by weight of an assimilation agent, 1.1 to 10 parts by weight of a hardening accelerator, 0.5 to 12 parts by weight of each of a shrinkage reducing material and an expansion agent, and 5 to 15 parts by weight of a thickener. Modular assembly-type non-drilling reinforcement method for underground conduits with improved lightness, corrosion resistance and durability using
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