KR102299784B1 - Precast concrete panel having heating module and black ice preventive road packing method using this same - Google Patents

Abstract

The present invention relates to a precast concrete (PC) panel having heating modules embedded therein, which can reduce accidents caused by black ice in winter through a combination of heating modules and a prefabricated PC panel and can extend service life by ensuring the durability of road pavement, and a method for paving a black ice prevention road by using the same. The PC panel comprises: a PC body (10); CNT heating modules (20) embedded in the PC body, connected to an electric wire, and for generating heat through supply of a voltage; and a protective layer (30) formed on the PC body to cover the CNT heating modules, protecting the CNT heating modules. The PC body is made of PC to include embedded grooves (11) into which the CNT heating modules and the electric wire are inserted. After the CNT heating modules are inserted and installed in the embedded grooves, together with the electric wire, the CNT heating modules are embedded through the formation of the protective layer, and receives power through the electric wire to generate heat, thereby maintaining the surface of the PC body at a predetermined temperature or higher.

Description

Precast concrete panel with heating module embedded and black ice prevention road paving method using the same {PRECAST CONCRETE PANEL HAVING HEATING MODULE AND BLACK ICE PREVENTIVE ROAD PACKING METHOD USING THIS SAME}

The present invention relates to a precast concrete panel, and more particularly, a heating module that reduces traffic accidents due to black ice in winter and extends life by securing durability of road pavement through a combination of a heating module and a factory-made precast concrete panel It relates to this buried precast concrete panel and a black ice prevention road paving method using the same.

This section provides background information related to the subject matter of the present application and is not necessarily prior art.

Black ice, which has recently emerged as a major factor in large-scale traffic accidents in winter, is a phenomenon in which water or snow seeps into and freezes through small cracks in the surface of asphalt or concrete.

According to the Traffic Accident Analysis System of the Road Traffic Authority, there were about 6,500 icy road accidents caused by black ice between 2014 and 2018, about 1.8 times more than those caused by heavy snow accumulation. , the fatality rate was more than 1.9 times higher.

Snow removal materials are being sprayed to prevent accidents caused by black ice, but roads are already frozen due to sub-zero weather, causing large traffic jams and many accidents.

In addition, in the case of road asphalt pavement, continuous damage is occurring due to plastic deformation and fatigue cracking.

In the asphalt pavement, the risk of black ice in winter as well as the durability of the road is increasing because maintenance is carried out considering only the appearance of the surface by repeatedly overlaying the upper surface layer (5 cm) on the pavement where the deformation of the lower base layer has occurred.

Fundamental repair and reinforcement of ground subsidence and internal cracks due to plastic deformation are required, and the importance of preventive measures for road snow melting and ice melting rather than reactive measures is emerging.

The electric heating wire method and the heat pipe method are applied as technologies for preventing freezing of heat-related roads that have been developed so far, but various unexpected problems are being derived in terms of construction or maintenance.

The existing anti-icing technology, the heating wire and heat pipe method, uses electricity or other energy sources to generate heat, and when the system malfunctions, it is difficult to repair effectively and requires re-construction, which causes technical and economic problems.

The heating wire cuts and installs a groove in the asphalt, which is a flexible pavement, in a section with a lot of vehicle traffic. Since the heating wire is often broken due to the pressure applied by the wheel of a large vehicle, the actual lifespan is only 2 to 3 years. Installation is required.

Since the snow removal method starts after snow has already been loaded, areas that can cause large-scale damage by black ice, such as tunnel entrances or exits, bridges, and large intersections, or areas with large floating populations or downhill slopes are subject to snow melting at the time of snowfall. It is difficult to secure vehicular traffic.

As a patent document of a method using a heating wire, Registered Patent No. 10-1202262 discloses an installation tube formed as a hollow space under the pavement surface and a heating unit including a heating wire provided in the installation tube; a power supply unit for supplying power used for the heating wire; a temperature sensor for measuring the temperature of the pavement surface; When the measured value of the temperature measuring sensor is less than or equal to a predetermined first set value, power is supplied to the heating wire through the power supply unit, and if the measured value of the temperature measuring sensor is greater than or equal to a predetermined second set value, power to the hot wire is cut off control unit; and a safety light installed on the pavement surface and turned on when power is supplied to the heating wire and turned off when power is cut off.

Registered Patent No. 10-1202262 Registered Patent No. 10-1705315

The present invention is to solve the above problems, and through a combination of a heating module and a factory-made precast concrete panel, there is a heating module that reduces traffic accidents caused by black ice in winter and extends the life of the road pavement by securing durability. An object of the present invention is to provide a precast concrete panel to be buried and a black ice prevention road paving method using the same.

A precast concrete panel in which a heat generating module is embedded according to the present invention comprises: a precast concrete body; a CNT heating module embedded in the precast concrete body and connected to an electric wire to generate heat through supply of voltage; The precast concrete body is formed to cover the CNT heating module and includes a protective layer to protect the CNT heating module, and the precast concrete body is free to include a buried groove into which the CNT heating module and the electric wire are inserted. It is made of cast concrete, and the CNT heating module is inserted into the buried groove together with the electric wire and installed, and then buried through the formation of the protective layer, and receives power through the electric wire to heat the surface of the PC body at a certain temperature. It is characterized in that it is maintained above.

According to the precast concrete panel in which the heating module is embedded according to the present invention and the black ice prevention road pavement method using the same, it is effective to prevent large traffic accidents due to black ice in winter that occur repeatedly, and Since rapid construction is possible through modularization, it also has the effect of minimizing traffic control time.

In addition, by paving the road with high-strength concrete, there is an effect of extending the life of the road pavement and ultimately reducing maintenance costs.

1 is a cross-sectional view of a precast concrete panel in which a heating module according to the present invention is embedded.
2 is a perspective view of a precast concrete body for showing a buried groove applied to a precast concrete panel in which a heating module according to the present invention is embedded.
3 is an exemplary view of manufacturing a precast concrete body applied to a precast concrete panel in which a heating module according to the present invention is embedded.
Figure 4 is another manufacturing example of the precast concrete body applied to the precast concrete panel in which the heating module according to the present invention is embedded.
5 and 6 are exemplary views of buried grooves applied to the precast concrete panel in which the heating module according to the present invention is embedded, respectively.
7 is an exemplary view in which a cube-type heating module is applied to a precast concrete panel in which a heating module according to the present invention is embedded.
8 is an exemplary view in which a panel-type heating module is applied to a precast concrete panel in which a heating module according to the present invention is embedded.
9 and 10 are exemplary views showing the connection of the heating module and the electric wire applied to the precast concrete panel in which the heating module according to the present invention is embedded, respectively.

In the following description of the present invention, if it is determined that a detailed description of a related well-known function or configuration may unnecessarily obscure the gist of the present invention, the detailed description thereof will be omitted. In addition, the terms described below are terms defined in consideration of functions in the present invention, which may vary according to intentions or customs of users and operators. Therefore, the definition should be made based on the content throughout this specification.

As shown in FIG. 1, the precast concrete panel 100 in which the heating module according to the present invention is embedded is a precast concrete body 10 (hereinafter abbreviated as 'PC body'), PC body ( It is buried in 10) and heats up through supply of voltage, so that the surface of the PC body 10 (the surface that the wheels of the car touches) is created under a temperature condition that does not generate black ice or as a heat generating module that melts snow and ice, preferably CNT heat Module 20 (hereinafter abbreviated as 'heating module'), including a protective layer 30 for protecting the heat generating module 20, for an electric device for applying a voltage to the heat generating module 20, Since the implementation is possible, the drawings and description will be omitted without being specifically described.

The PC body 10 is a conventional precast concrete product, sized for paving the road, and is a reinforced concrete product with reinforcing bars 12 reinforced therein, but includes a structure for embedding the heat generating module 20 .

Preferably, as shown in FIG. 2 , the PC body 10 is manufactured to have a buried groove 11 that is opened toward the road surface based on the installation state.

As shown in FIG. 5, the buried groove 11 is a type in which the heating module 20 and the electric wire are embedded. It is also possible that the heating module embedding part 11-1 in which the module 20 is embedded and the electric wire embedding part 11-2 in which the electric wires are embedded have different sizes. In the buried groove 11 of FIG. 6 , a plurality of heating modules 20 are embedded in the heating module embedding part 11-1 and spaced apart from each other at a predetermined distance, and the wires are buried in the wire embedding part 11-2. useful in the way

The wire embedding part 11-2 is formed to have a smaller size (width) than the heating module embedding part 11-1 so that the electric wire has a smaller volume than the heating module 20 .

The buried groove 11 is post-processing of manufacturing the PC body 10 first and then processing the groove, but it is an unnecessary operation and may damage the PC body 10 during post-processing of the buried groove 11, so when pouring concrete It is preferable to manufacture

As a method of manufacturing the PC body 10 having the embedding groove 11, the PC body 10 is turned over with the embedding groove 11 formed at the bottom, and the embedding groove 11 is manufactured to be disposed on the top. There is a way.

More specifically, as shown in FIG. 3 , the formwork 1 has a structure in which a pouring space that is opened toward the top is formed inside by the floor formwork and the surrounding wall formwork (the floor formwork and the wall formwork are separate and All-in-one type is possible, and it is preferable to use a detachable type for demolding), and the mold material 2 for forming the buried groove 11 is fixed to the bottom formwork.

The mold material 2 has the same shape and size as the shape and size of the embedding groove 11, and is a protrusion fixed to the bottom surface of the floor formwork and protruding from the bottom surface of the floor formwork, that is, there is a mold material (2). The part is that the concrete is not filled.

The mold material 2 is made of a material (steel, rubber, etc.) of strength that is not deformed by the pouring pressure of concrete, and its shape is manufactured in various ways according to the shape of the buried groove 11 . In addition, when the PC body 10 is separated after curing of the concrete, the surface of the mold material 2 is peeled off so that the mold material 2 and the embedded groove 11 of the PC body 10 are not damaged. (The peeling treatment can be a technique widely used in concrete manufacturing technology) It is preferable to be treated.

In addition, the mold material 2 is detachably fixed to the formwork 1 through a fastener 3 of a bolt and a nut so that it can be replaced.

That is, as shown in FIG. 3 , when concrete is poured into the pouring space of the formwork 1 and the formwork 1 is demolded after curing, the PC body 10 having a buried groove 11 at the bottom is manufactured.

Upside down of the thus-fabricated PC body 10 is followed by a subsequent operation.

4 shows an example of manufacturing the buried groove 11 to be disposed on the upper part, and the PC body 10 is manufactured using the molding jig 200 having the mold material 2 .

For example, the molding jig 200 is connected to a pair of support parts 210 supported on the wall formwork or the ground of the formwork 1, the support part 210, and the mold material fixing rod 220 to which the mold material 2 is fixed. ) is composed of

The support part 210 can be configured in various ways, such as being supported by the wall formwork and fixed through a fastening bolt or the like.

Both sides of the mold material fixing rod 220 in the longitudinal direction are respectively connected to the pair of support portions 210 , and the mold material 2 is fixed thereto. The mold material 2 is detachably fixed to the mold material fixing rod 220 for various types and replacement.

The molding jig 200 may demold the mold material 2 through separation from the mold 1 , or the mold material fixing rod 220 may be configured to be height-adjustable and may be demolded through height adjustment.

Adjusting the height of the mold material fixing rod 220 has the advantage of being able to adjust the depth of the embedding groove 11 as well as demolding.

According to the above configuration, after the mold material (2) is installed at a height for forming the buried groove (11), concrete is poured into the pouring space of the formwork (1). At this time, the concrete pouring height is the height at which a part of the mold material 2 is exposed to the outside.

After the concrete is cured, the PC body 10 is completed when the molding jig 200 is separated or raised to take out the mold material 2 .

Since the PC body 10 has the buried groove 11 open upward and exposed to the outside, subsequent work is possible without turning over.

The interval between the buried grooves 11 is that of the heating module 20, that is, the interval between the heating modules 20 will be determined according to the amount of heat generated by the heat generating module 20, and since the amount of heat can be varied, the buried groove 11 ) is different depending on the heating module 20 .

Two or more panels 100 of the present invention can be used together to pave a road, and leveling means (leveling bolts), interlocking connecting members (dowel bars, etc.), lifting so that the pavement surface has the same overall height. A ring, a grouting hole, etc. are applied, and since this configuration is a known configuration, a detailed description thereof will be omitted.

The heating module 20 is a CNT (Carbon Nano Tube, carbon nano tube), which is known to have excellent thermal and electrical conductivity and excellent strength characteristics, and is applied to road pavement through the present invention.

The heating module 20 for the present invention is divided into a cube type and a panel type based on the shape thereof.

As shown in FIG. 7 , the cube-shaped heating module 20-1 is processed into a cube shape having the same width (width), length (length) and thickness (height), and a plurality of PC body (10) are spaced apart from each other. ) is embedded in

As shown in FIG. 8 , the panel-type heating module 20 - 2 has a longer length than the width, and a plurality of them are embedded in the PC body 10 at regular intervals.

The thickness (height) of both the cube-type heating module 20-1 and the panel-type heating module 20-2 depends on the coating thickness, and when the maximum coating thickness is 80 mm, the thickness is 50 mm.

The installation patterns of the heating modules 20-1 and 20-2 are not limited to those shown in the drawings, and FIGS. 7 and 8 show the heating modules 20-1 and 20-2 only in the portion through which the vehicle wheels pass. is an example of installing .

The heating module 20 should be connected to an electric wire so that a voltage can be applied, and preferably, all the heating modules 20 are connected in series or parallel with the electric wire.

9 shows an example of a direct method in which the anode wire 41 and the cathode wire 42 of the electric wire are connected to the heat generating module 20 by soldering, and FIG. An example of an indirect method for connecting the lead wires 21 and 22 and the positive wire 41 and the negative wire 42 of the electric wire by providing (21, 22) is shown.

In the indirect example, when the heat generating module 20 is processed (cube type, panel type), a part of the lead wires 21 and 22 is inserted into the heat generating module 20 and the remaining part protrudes out of the heat generating module 20 . It is installed as much as possible, and the form of a net is preferable for stable contact with the electric wire.

Such an indirect connection method can prevent disconnection with the heating module 20 and is very useful in preventing malfunction by stably connecting to the electric wire.

The electric wire operates by receiving power from the power supply passing through the controller, and the panel 100 is modularized and connected to the controller at the construction site so that the heating module 20 operates, for example, at the end of the electric wire. The socket is connected and installed so that the socket is exposed to the outside at the edge of the PC body 10 .

The power supply unit may use commercial power, renewable energy such as solar energy, a battery, a secondary battery, and the like.

In addition, the power supply unit may be installed outside the panel 100 , or a receiving unit may be formed in the PC body 10 of the panel 100 to be accommodated in the receiving unit.

The controller can be controlled manually or automatically.

In manual control, an administrator operates a manual switch to turn the controller on or off.

Automatic control is to turn on or off the controller based on weather conditions (temperature, rain, snow, etc.) includes a controller that controls the

In addition, the controller may be managed through remote control by wirelessly communicating with the server of the remote control room.

The heat generating module 20 is installed by inserting after processing the buried groove 11 and may be shaken in the buried groove 11 even though it is protected by a protective layer 30 to be described later. Due to such shaking, the surface of the panel 100 is Since it may cause damage, such as protruding from the, a filling groove 23 is included in the peripheral portion of the heating module 20 to prevent this.

The filling groove 23 may be formed along the peripheral portion as a groove that is opened toward the outside on the peripheral surface of the heating module 20, or a form in which a plurality of hemispherical grooves are formed is also possible.

The filling groove 23 may be filled with a separate filler (eg, epoxy) to fix the heating module 20 or may be filled with a material of the protective layer 30 to be described later.

The protective layer 30 protects the heat generating module 20 from the load of the vehicle, and the material may be a conventional packaging material, mortar, or the like, and a heat conductive material may be added to the material.

As the thermal conductive material, a material having excellent thermal conductivity, such as CNT or copper, is used.

In addition, as shown in FIG. 1 , the protective layer 30 may be in the form of a package formed entirely on the surface of the PC body 10 , or in the form of filling in the buried groove 11 covering only the upper portion of the heat generating module 20 .

The black ice prevention road paving method using the precast concrete panel in which the heating module is embedded according to the present invention is as follows.

In the present invention, both repair work and new construction work are possible, and the repair work will be described as an example. The repair work is an area where black ice is likely to occur, for example, the entrance and exit of a tunnel, a place shaded by structures or geographical conditions, etc.

1. Clear the pavement.

After removing the existing pavement (eg asphalt pavement), the side of the removed pavement section is cleaned.

2. Installation of precast concrete panels in which heating modules are embedded.

After the panel 100 is lifted and transported over the pavement section, it is mounted on the pavement surface.

Adjust the leveling of the panel 100 and interlock with the neighboring panel 100 .

3. Grouting.

After sealing the edge of the panel 100 , a gap is grouted between the bottom of the panel 100 and the pavement surface through the grouting hole of the panel 100 .

4. Connection between heating module and controller.

A controller and a power supply are installed next to the pavement area where the panel 100 is installed, and the controller is connected to the electric wire of the panel 100 .

The coating and packaging by the panel 100 is completed through the above process.

According to the road pavement constructed through the above process, when a voltage (for example, 30 to 60V)) is applied to the heat generating module 20 in a weather condition in which black ice on the road surface is generated, the heat generating module 20 generates heat ( 25°C for example).

The heat of the heat generating module 20 is transferred to the surface of the PC body 10 so that the surface of the panel 100 and the cracks formed from the surface are formed at a temperature higher than the temperature at which black ice is generated.

Therefore, even if water or snow seeps into a small gap from the surface of the panel 100, it does not freeze.

In addition, the present invention can not only prevent black ice, but also melt already frozen ice through the heat of the heat generating module 20 .

As a result, the road paved by the panel 100 of the present invention prevents accidents caused by black ice.

1: formwork, 2: mold material
10: precast concrete body, 11: buried groove
11-1: Heating module buried part, 11-2: Wire buried part
12: rebar,
20: heating module, 20-1: cube-type heating module
20-2: panel-type heating module, 21, 22: lead wire
30: protective layer,
200: molding jig, 210: support
220: mold material fixing rod,

Claims (8)

Precast concrete body 10 and;
a CNT heating module 20 embedded in the precast concrete body and connected to an electric wire to generate heat through supply of voltage;
and a protective layer 30 formed to cover the CNT heating module on the precast concrete body to protect the CNT heating module,
The precast concrete body includes a buried groove 11 into which the CNT heating module and the electric wire are inserted, wherein the buried groove is formed at a predetermined distance from each other, and the heating module embedding part in which the CNT heating module is embedded; and a wire embedding part formed to connect the heating module embedding parts with a width smaller than that of the heating module embedding part between the heating module embedding parts to be embedded and in which wires are embedded,
The protective layer is made of a packaging material or mortar, is formed entirely on the surface of the precast concrete body or is filled in the buried groove to protect the CNT heating module,
The CNT heating module is inserted into the embedded part of the heating module and installed together with the wire inserted into the embedded part of the wire, then embedded through the formation of the protective layer, and generates heat by applying power through the wire to the precast concrete body Maintaining the surface of the surface above a certain temperature, including a filling groove that is opened toward the outside in the periphery, and after being inserted into the buried groove, the material of the protective layer or a separate filler to be filled in the buried groove is filled in the filling groove A precast concrete panel in which a heating module is embedded, characterized in that it is fixed. The precast concrete panel in which the heating module is embedded according to claim 1, wherein the CNT heating module includes a lead wire that protrudes to be connected to the electric wire, and connects the lead wire to the electric wire. The precast concrete panel in which the heating module is embedded according to claim 1 or 2, wherein the CNT heating module is a cube-shaped cube or a panel-shaped panel having a length longer than the width. delete The method according to claim 1, wherein the precast concrete body is cured by pouring concrete into the form in which the mold material is fixed to the floor form, and after demolding the form, the upper and lower parts are formed so that the buried groove formed through the mold material faces upward. A precast concrete panel in which a heating module is embedded, characterized in that it is manufactured through a process of turning over. The method according to claim 1, wherein the precast concrete body is placed in the upper part of the precast concrete body through a process of arranging a mold material through a molding jig through a molding jig, pouring concrete and curing the mold, and then demolding the formwork. A precast concrete panel in which a heating module is embedded, characterized in that it is manufactured to be so. delete A black ice prevention road paving method using a precast concrete panel in which the heating module according to claim 1 is embedded, comprising:
A first step of lifting and mounting the precast concrete panel in which the heating module according to claim 1 is embedded in the pavement area;
and a second step of electrically connecting the heating module of the precast concrete panel in which the heating module is embedded with a controller.

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