KR100804783B1 - Assembly manhole - Google Patents

Abstract

A prefabricated manhole is provided to reduce volume and weight, to handle easily and economically, and to have excellent watertightness and strength. A prefabricated manhole(100) includes a lower plate(10), a main body(20) formed in a cylindrical shape opened upward and downward and erected on the lower plate, an upper plate(30) coupled to an upper opening of the main body and equipped with a circular passage(31), an upper cylindrical body(40) coupled to communicate with the passage of the upper plate and connected with a cover, and a cover(50) coupled on the upper cylindrical body by a support frame, wherein the lower plate, the upper plate and the upper cylindrical body are manufactured with polymer concrete formed by mixing 0.8~1.2 weight percent chopped glass fiber of 6~10mm with 100 weight percent mortar composed of 8~12 weight percent unsaturated polyester resin, 16~23 weight percent silica sand and 65~75 weight percent filler, and the main body is assembled with the lower plate and the upper plate by inserting the bottom of the main body to a main body fitting groove(11) of the lower plate and attaching with adhesives, and coupling the upper plate to an upper plate fitting groove(21) formed on the top of the main body and attaching with adhesives, and composed of an outer layer(24) made of polymer concrete and glass fiber, a deep layer(25) formed in the outer layer and made of polymer concrete, an inner layer(26) formed in the deep layer and made of polymer concrete and glass fiber and a resin protection layer(27) formed in the inner layer and made of unsaturated polyester resin having excellent chemical resistance and water resistance.

Description

Prefab Manholes {ASSEMBLY MANHOLE}

The present invention relates to a manhole, and more particularly, because the tubular body and the upper and lower plate body made of a synthetic resin are assembled to each other, the weight is not only light, but also easy to install and excellent water-tight prefabricated manhole.

In general, manholes are holes that allow people to enter and exit the road, and the place where they are installed is installed in places where the thickness or direction of the pipe changes, the starting point or intersection, and the middle of the long straight part. do. The shape is the most easy to construct a circle, and there are also square, oval, etc. The entrance is framed with a steel frame or stone around it and covered with a round lid made of cast iron or reinforced concrete, usually about 60cm in diameter. The main body is made of concrete or brick, and the inside diameter of the passage hole is often 1 ~ 1.2m, and the bottom is the same as the bottom of the pipeline or lowers to accommodate the sediment. The depth depends on the depth of the pipeline, but the depth is over 100m.

The manhole is embedded in the ground and used, connecting pipes are integrally formed on both sides of the lower part of the manhole body, and flanges are formed on the upper and lower parts of the body, and a lid is installed at the center of the upper body. These manholes are mainly made of one-piece concrete, and are constructed using concrete ready-made products made in the form of site-casting or concrete. In case of placing concrete in the field, it is necessary to install a formwork, insert reinforcing bars in the installed formwork, and add concrete, which is not only inconvenient of construction but also takes a long time to cure concrete, resulting in a long construction period. There is.

In addition, when the manhole is manufactured and installed as a single-piece concrete, its own elasticity is insufficient, and durability due to vibration of the ground is not sufficient, and water penetrates into the concrete, causing problems such as corrosion of the manhole. That is, the life of the manhole is shortened.

In addition, in the case of the integral cement concrete manhole, the cement paste is weakly attached by injecting and attaching cement paste into the connecting groove, and thus it is difficult to exclude air therein.

In order to solve this problem, Korean Patent No. 500913 discloses a glass-fiber reinforced plastics (GRP) manhole using synthetic resin and glass fibers. The GRP manhole disclosed in Korean Patent No. 500913 is formed of an inner layer and an outer layer of synthetic resin wrapped in a mold, a glass fiber wrapped on the synthetic resin, and a synthetic resin wrapped on the glass fiber, and an intermediate layer wound between the inner layer and the outer layer. To form a manhole.

However, when the glass fiber is wound on the synthetic resin wound on the rotating mold as described above, the glass fiber is wound only in a certain direction, causing the glass fiber to be completely impregnated in the synthetic resin. That is, since the glass fiber is wound up after forming the synthetic resin layer, the problem that the glass fiber and the synthetic resin are separated because the synthetic resin and the glass fiber are not completely bonded occurs, which impairs the durability of the manhole tube. It is.

In addition, since the foundation to install the tubular body is formed by pouring concrete, the tubular body should be installed thereon, so that water leakage occurs between the tubular body and the base concrete, as well as curing the foundation concrete in the field, the construction period is Many problems are involved.

In addition, the GRP manhole is a structure in which the upper plate and the main body are watertight with the weight of the upper plate while placing the rubber ring, and the lower plate and the main body are connected by placing the main body, which is a resin product, in the lower plate and placing the organic resin product and the inorganic There is also a problem in that leakage occurs due to poor adhesion to the connection due to the difference in the coefficient of thermal expansion and heterogeneity between the two materials of the concrete product.

In addition, the conventional manhole has a high compressive strength and a large manhole in order to compensate for this, because of the small compressive strength, and the weight is heavy, accordingly, there is no small quantity that can be mounted on the transport vehicle, it takes a lot of transportation costs and transport There is also the problem of using large equipment.

The present invention is to solve the above-mentioned conventional problems, and to provide a prefabricated manhole with excellent water-tightness and strength, while reducing the cost of handling and easy to handle by reducing the volume and light weight of the manhole. have.

The prefabricated manhole according to the present invention for achieving the above object is made by assembling the lower plate, tubular body, the upper plate, the upper sphere and the adhesive, the lower plate, the upper plate, the upper sphere are each made of polymer concrete and the tubular The main body is made of a multilayer of an outer layer, a deep layer, an inner layer, and a resin protective layer.

According to the prefabricated manhole according to the present invention, by manipulating the manhole body and the upper and lower spheres formed by unsaturated polyester resin, glass fiber and polymer concrete to form a manhole integrally, not only the construction of the manhole is simple but also watertightness and durability There is an effect to be improved.

The features and advantages of the present invention will become more apparent from the following detailed description based on the accompanying drawings. Prior to this, the terms or words used in the present specification and claims are defined in the technical spirit of the present invention on the basis of the principle that the inventor can appropriately define the concept of the term in order to explain his invention in the best way. It must be interpreted to mean meanings and concepts.

1 and 2, the prefabricated manhole 100 according to the present invention includes a lower plate 10, a main body 20 vertically standing on the lower plate 10 and a cylindrical body having an upper and lower portions open, and a main body 20. Is coupled to the upper opening of the upper plate 30 is provided with a circular passage 31 and the inside is coupled to communicate with the passage 31 of the upper plate 30 and a cylindrical for connecting the lid 50 to be described later The upper sphere 40 and the lid 50 coupled through the support frame 51 on the upper sphere 40.

The lower plate 10, the upper plate 30 and the upper sphere 40 according to the present invention, 8 to 12% by weight of unsaturated polyester resin, 16 to 23% by weight of silica sand and fillers (calcium carbonate, Fly ash) 65-75% by weight of mixed mortar 100% by weight of 6 ~ 10mm glass fiber chop (0.8 ~ 1.2 parts by weight of the polymer concrete is further mixed.

The glass fiber 증진 may prevent internal cracking occurring inside the product by improving the impact strength against external impact and also preventing shrinkage generated during curing of the polymer concrete.

Preparation of the polymer concrete is as follows.

In the stirrer, 100% by weight of unsaturated polyester resin, silica sand and filler are added to the stirrer and stirred firstly, and 6 to 10 mm of glass fiber 촙 0.8 to 1.2 parts by weight (parts by weight) By mixing with the mortar and not being satisfied with 100% by weight but further mixing with respect to the total weight of the mortar) and stirring for a further 30 seconds to disperse the glass fibers.

Unsaturated polyester resin: The high molecular compound whose saturated monomer superposed | polymerized by the ester bond is carried out. Role of Binder in Cement Concrete

Density (25 ℃, g / cc) Viscosity (25 ℃, mPas) Acid value Styrene content (%) 1.12 ± 0.02 300 20 ± 4 40

Silica: The role of aggregate in cement concrete

Size (mm) Unit weight (kg / m ³ ) Fine Aggregate Rate Moisture content (%) Sio ₂ content ≤5 1,645 2.48 0.3 or less 95%

Filler: The main purpose of using fillers in polymer concrete blending is to use particulate fillers to reduce the amount of resin used per unit volume and to improve viscosity. Particle size is about 1 ~ 30㎛, powder degree is 2,500 ~ 3,000 ㎠ / g, water content less than 0.3% is used.

Here, the top plate 30 is made of a polymer concrete composition of unsaturated polyester resin, silica sand and filler, and also includes a glass fiber mat 32. Glass fiber mat 32 is applied to unsaturated polyester, vinyl ester, epoxy resin, etc. by sizing for easy hard lay up work, and maintains beautiful surface state after FRP work by using excellent impregnation strand. It has excellent handling properties and cutting properties, and has a characteristic capable of easy defoaming and curved molding through rapid resin impregnation.

The glass fiber mat 32 is inserted into the mold for placing the top plate 30 and is then inserted by pouring the polymer concrete. Glass fiber mat 32 serves as a reinforcing bar (strength reinforcement) to the existing cement concrete manhole top plate. In the case of the conventional reinforcing bar reinforcement and welding a separate process is required, the glass fiber mat 32 has the advantage that the process is simple and does not cause corrosion to the impermeable layer. The fiberglass mat 32 may vary in mesh and quantity depending on the cross-sectional area of the body 20.

The lower plate 10 is a bottom plate formed in a circular shape when viewed from above, and the main body fitting groove 11 opened upward toward the upper circumference portion is formed in a circular shape. The main body 20 is inserted into the main body fitting groove 11 and bonded to the main body 20 so that the main body 20 stands on the lower plate 10. The tapered reinforcement 12 of the mountain shape thicker than the interval is formed. That is, the main body fitting groove 11 may be formed at the center of the tapered reinforcement part 12 to secure the insertion depth of the main body 20.

The outer diameter of the lower plate 10 is formed 14cm larger than the main body 20, which is to form a buoyancy stopper for preventing the light weight polymer concrete manhole from floating by buoyancy.

The main body 20 is formed in a cylindrical shape with the upper and lower parts opened to the lower plate 10, and the upper plate 30 is coupled to the upper opening. The main body 20, the lower plate 10 and the upper plate 30 are assembled through a fitting type and an adhesive, respectively, and the lower end of the main body 20 is inserted into the main body fitting groove 11 of the lower plate 10 and bonded with an adhesive, and the main body The upper end of the upper plate fitting groove 21 is formed.

The main body 20 has the same thickness as the entire body, and the expansion part 22 is formed at the upper end where the upper plate fitting groove 21 is formed so that the entire weight of the main body 20 can be lightly coupled to the upper plate 30. have.

Since the main body 20 collects rainwater and provides a work space, the pipe joint block 23 is provided. The joint block 23 is manufactured to have a tube insertion hole 23a by first drilling a hole in the cylindrical body 20, installing a formwork around the hole, and then pouring and pouring the polymo concrete into the form. do.

The main body 20 of such a structure receives the most external pressure by its shape and size, and in order to prevent cracking and deformation caused by the external pressure, the fiber-reinforced plastic (which means glass fiber) is lightweight, high strength and excellent in corrosion resistance. Is formed in a very economical sandwich structure that can withstand the external pressure with the rigidity of the intermediate layer polymer mortar, for example, formed inside the outer layer 24, outer layer 24 is a mixture of polymer concrete and glass fiber And a deep layer 25 made of the polymer concrete, a deep layer 25 formed therein, and a resin protective layer 27 formed on the inner surface of the inner layer 26 and the inner layer 26 formed by mixing the polymer concrete and glass fibers. (The resin constituting the resin protective layer 27 is an unsaturated polyester that satisfies the ISO standard excellent in chemical resistance and water resistance. Resin).

The reason for the three-layer structure of the manhole main body 20 is that the inner and outer layers of the manhole are formed with lateral earth pressure to form a glass fiber layer having excellent tensile strength, and to resist the pressure caused by the vehicle load. Is an excellent polymer concrete molded in the center layer, and the ratio of the thickness is inner layer: deep layer: outer layer = 1: 6: 1. The overall thickness of the main body 20 satisfies 40 mm regardless of the height of the manhole.

The upper plate 30 has an upper sphere fitting groove 33 formed on the upper surface while the fitting protrusion 33 to which the upper plate fitting groove 21 of the main body 20 is fitted on the bottom surface is joined to the adhesive.

The upper sphere 40 is fitted to the upper sphere fitting grooves 33 of the upper sphere fitting groove 33 of the upper plate 30 protruding toward the lower portion is coupled to the upper plate 30.

That is, the lower plate 10, the main body 20, the upper plate 30, and the upper sphere 40 are bonded to each other by applying an adhesive portion and fitting portions through protrusions and grooves corresponding to each other.

Prefabricated manhole 100 according to the present invention is configured to enable the height of the body 50 and the size of the lid 50. The manhole 100 should secure a volume ratio suitable for the installation conditions, and the volume ratio may vary depending on the installation conditions. Therefore, as shown in FIG. 4, according to the present invention, the volume ratio of the main body 20 can be increased through the height adjusting main body 60 and the height adjusting sphere 70 described below, and the height of the lid 50 is adjusted. Can be.

The height adjustment main body 60 has a fitting protrusion 61 fitted into the upper sphere fitting groove 21 of the main body 20 at the bottom thereof, and the fitting protrusion 32 of the upper plate 30 is fitted to the upper surface thereof to be bonded with an adhesive. An upper plate fitting groove 62 is formed to be interposed between the body 20 and the upper plate 30.

The height adjustment sphere 70 has a fitting protrusion 71 fitted into the upper sphere fitting groove 32 of the upper plate 30 at the bottom, and the lower fitting protrusion 41 of the upper sphere 40 is fitted on the upper surface thereof. The fitting groove 72 is formed to be bonded with an adhesive while interposed one or more between the upper plate 30 and the upper sphere 40.

The height adjustment main body 60 is comprised from the outer layer 63, the deep layer 64, the inner layer 65, and the resin protective layer 66 similarly to the main body 20. As shown in FIG.

The height adjustment sphere 70 is 6 to 10mm glass fiber in 100 parts by weight of the mixed mortar mixed with 8 to 12% by weight of unsaturated polyester resin, 16 to 23% by weight of silica sand and 65 to 75% by weight of the filler, respectively, based on 100% by weight of the total. 촙 0.8 ~ 1.2 parts by weight of the composition is mixed after further pouring is prepared through vibration and curing.

The prefabricated manhole according to the present invention has the following characteristics.

1. Polymer concrete compressive strength: 900㎏f / ㎠ or more

2. Outer body pressure: 3,000㎏f / ㎠ or more

3. Water tightness (allowable water leakage (ℓ / m)): 0.07 or less (0.07 based on water allowable water, test time 10 minutes)

The installation process of the manhole according to the present invention is as follows.

(1) Manhole Foundation Floor Cleanup

① Cast discarded concrete or rubble and sand on the floor to maintain the level of manholes and solid ground.

(2) assembling the manhole

① When the manhole body 20 (the sphere in the vertical state excluding the upper plate and the lower plate) and the upper sphere 40 are bonded together, the boundary between the manhole body and the upper sphere is spherical resin (the spherical bonding resin is a two-component epoxy resin. (Epoxy resin, white), hardener (poly-amide amine, dark gray) cream and good adhesion to concrete, metal, wood, etc. That is, by applying the adhesive resin to the fitting protrusion 41 and / or the fitting groove 33 of the upper plate 30 of the upper sphere 40 by fitting the fitting protrusion 41 and the fitting groove 33 The upper sphere 40 is coupled to the top plate 30.

② Be careful not to be impacted by the manhole upper sphere 40 until hardening of the resin for spherical bonding is completed (at least 60 minutes after compounding the resin).

(3) perforation

① Mark the position of the pipe to be connected to the manhole sphere on the manhole.

② After marking, install the perforator support on the manhole sphere. At this time, the perforator support is fixed firmly so as not to deviate from the position during drilling.

③ Install the perforator on the support after the installation of the perforator support. The perforator uses a core drill for concrete.

④ After the installation of the boring machine is completed, make sure that the boring machine support does not deviate from the position.

(4) jointing of pipes

① Face the periphery of the perforated area using a grinder.

② After the surface treatment, install the prepared formwork.

③ After installing the formwork, insert the tube through the space in the center of the formwork, and fix the tube and formwork so as not to shake.

④ Mix resin mortar for pipe joint. The material used at this time mixes and mixes each of resin, hardening | curing agent, and aggregate which were specified for the pipe joint. The pipe joint resin is formed by mixing an unsaturated polyester resin (the role of cement in cement concrete) and a curing agent (methyl ethyl ketone prooxide (MEKPO)) (an initiator of a curing reaction) as a main component.

⑤ Pour the mixed resin mortar into the formwork.

⑥ After curing is completed, dismantle the formwork.

Here, the top plate 30 is made of a polymer concrete composition of unsaturated polyester resin, silica sand, and filler, and also includes glass mat fibers 32.

1 is a perspective view of a prefabricated manhole according to the present invention.

Figure 2 is an exploded perspective view of the prefabricated manhole according to the present invention.

Figure 3 is a longitudinal cross-sectional view of the prefabricated manhole according to the present invention.

Figure 4 is a longitudinal sectional view of the adjustment body and the adjustment sphere is applied to the prefabricated manhole according to the present invention.

<Description of Signs for Main Parts of Drawings>

100: manhole, 10: lower plate

20: main body, 30: top plate

40: upper sphere, 50: lid

60: height adjustment body, 70: height adjustment sphere

Claims (2)

A lower plate in which a tapered reinforcement portion thicker than the other section is formed in a ring shape on the upper circumference thereof, and a main body fitting groove opened in the center at the center of the tapered reinforcement portion is circular; A cylindrical body having a lower end fitted into the main body fitting groove of the lower plate and bonded with an adhesive, and having an extended portion formed at the upper end, and having an upper plate fitting groove opened upwardly at the extended portion; A pipe joint block formed in a box shape so as to have a tube insertion hole communicating with a hole formed in the main body; A top plate into which a top fitting groove of the main body is fitted to form a protrusion to be bonded with an adhesive, and an upper sphere fitting groove is formed to be eccentric on the top surface and a glass fiber mat is inserted therein; A cylindrical upper sphere having a protrusion formed at an upper surface of the upper sphere fitting groove of the upper plate so as to protrude toward the lower side and coupled to the upper plate; It includes a lid coupled to the upper opening of the upper sphere to be opened and closed through a support frame, The lower plate, the upper plate, and the upper sphere are 6 to 10 mm glass to 100 parts by weight of the mortar mixed with 8 to 12% by weight of unsaturated polyester resin, 16 to 23% by weight of silica, and 65 to 75% by weight of filler based on 100% by weight of the total. Fiber 촙 0.8 ~ 1.2 parts by weight of mixed polymer concrete is poured and then manufactured through vibration and curing, The main body is formed of an outer layer of the polymer concrete and glass fibers, the inner layer of the outer layer formed of the polymer concrete, the inner layer formed of the inner layer and the polymer concrete and glass fibers mixed with the inner layer and the inner layer Prefabricated manhole made of a resin protective layer formed on the inner peripheral surface. The method of claim 1, A bottom portion is provided with a protrusion fitted to the upper sphere fitting groove of the main body, and an upper plate fitting groove is formed on the top surface to which the upper plate is fitted and bonded with an adhesive, and is interposed between the main body and the upper plate and at least one outer layer, A height adjusting body comprising a deep layer, an inner layer, and a resin protective layer; 6 to 10 mm glass fiber 촙 0.8 to 1.2 parts by weight is added to 100 parts by weight of the mixed mortar mixed with 8 to 12% by weight of unsaturated polyester resin, 16 to 23% by weight of silica sand and 65 to 75% by weight of filler. After being poured, the projections are fitted to the upper sphere fitting grooves of the upper plate through vibration and curing, and an insertion groove is formed on the upper surface to which the lower protrusions of the upper spheres are interposed between the upper plate and the upper sphere. Prefabricated manhole characterized in that it further comprises a height adjustment sphere bonded to the adhesive.

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