JP2554517B2 - Construction method of snow melting road floor - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Industrial field of application) The present invention is intended to prevent freezing of road surfaces such as roads, bridges and runways of airports, grounds, floors such as parking lots, and to melt snow. The present invention relates to a method for constructing a snow-melting road floor surface, particularly, a method for constructing a paved road-bed surface into a snow-melting road floor surface.

(Prior art) In order to prevent freezing and melting of snow on the existing roadbed surface in cold regions, sprinklers are installed to sprinkle water on the roadbed surface or spray calcium chloride. It is being appreciated. However, installation of the sprinkler is costly, the nozzle is easily clogged with dust and earth, and spraying calcium chloride requires a lot of labor and costs a lot, and the surrounding trees There is a problem that there is a risk of dying.

In addition, recently, for the purpose of melting snow and ice on the existing pavement floor surface, a method of burying a large number of heat radiating pipes that circulate a heat medium such as hot water or groundwater under the road floor surface has also been performed. . This is usually done by cutting the entire upper layer of an existing pavement to a specified depth and then piping a plurality of heat radiation pipes on the exposed surface of the cut pavement, then paving the entire upper layer again. It depends on the method of burying. However, this method
When the upper layer pavement was constructed, the radiating pipe that was piped moved, and the radiating pipe that circulates the heat medium could not be laid at a certain depth with respect to the roadbed surface and at equal intervals, so the heat medium circulates. Then, even if the road surface is heated, there is a circumstance that it cannot be uniformly heated.

Therefore, a method of fixing the radiating pipe with a fixed tool or device when burying the radiating pipe and a snow melting device have been developed. For example, these are disclosed in Japanese Patent Publication No. 53-4740 and Japanese Utility Model Publication 58.
It is known from Japanese Patent Publication No. -17766. That is, the former is provided with a fixing member composed of a wire grid in order to lay a plurality of heat radiation pipes at equal intervals under the roadbed surface, and after fixing the heating pipe to the fixing member with fasteners, This is a method of burying heat dissipation pipes by paving the upper surface.In the latter, water supply pipes with square cross sections are arranged at equal intervals on the back surface of a face plate made of steel plate, and flanges are provided at both ends of these water supply pipes. And connecting the flanges to each other so that the water supply pipes communicate with each other, and the water supply pipes are fixed at predetermined positions. However, in all of these construction methods, the work of fixing the radiating pipe is troublesome and requires a lot of labor, and at the time of burying the radiating pipe or the water supply pipe, the existing pavement is completely cut. In addition, a lot of equipment is required to fix the heat dissipation pipe, which causes a cost increase.

(Problems to be Solved by the Invention) As described above, the conventional method for constructing a snow melting road floor surface requires a lot of labor and equipment in order to securely hold the heat radiating pipe, and also requires a lot of time. There is a problem of spending and being complicated.

The present invention has been made in view of the above circumstances, and an object thereof is to easily and economically attach a heat radiation pipe to an existing pavement without using equipment for fixing the heat radiation pipe. It is an object of the present invention to provide a method for constructing a snow melting road floor surface that can be buried at a certain distance and at a constant depth.

[Structure of the Invention] (Means and Actions for Solving the Problems) In the present invention, the upper layer of a predetermined portion of an existing pavement is cut to a predetermined depth, and a plurality of grooves are formed on the cut exposed surface. After that, a radiating pipe that circulates a heat medium is laid inside the groove, and then an upper layer is formed on the upper surface of the exposed cutting surface to embed the radiating pipe.

Further, by putting the heat dissipation pipe in the groove, the heat dissipation pipe does not move even if a pressing force is applied to the heat dissipation pipe when forming the upper layer, and the heat dissipation pipe is placed at a predetermined position below the road floor surface. Of the existing paved roads in cold regions such as bridges, airport runways, grounds, parking lots, etc. is there.

(Embodiment) An embodiment of the present invention will be described below with reference to the drawings.

FIG. 1 shows a cross section of the constructed snow melting road floor surface, and FIGS. 2 (A) to (F) show the construction method. 1 is, for example, a road having an asphalt paved road surface 2 as a road floor surface, and the road layer structure of the road 1 is composed of a roadbed 3 and a paving body 4 constructed above the roadbed 3. The upper layer 7 and the lower layer 8 are composed of the surface layer 5 and the base layer 6 from the upper layer to the lower layer. The lower layer portion 8 is a layer that absorbs and disperses energy of a traffic load applied from the road surface 2 and reduces the load to the roadbed 3 and transmits the load evenly. For example, crushed stone, slag, gravel, sand or cement-based materials It is built by adding bituminous additives. Further, the base layer 6 is provided above the lower layer portion 8 and is formed by a coarse-grained heated asphalt mixture, and the surface layer 5 is at the uppermost portion of the pavement 4 and transmits the load to the lower layer portion 8 and resists abrasion and shearing. It is formed by a strong dense-grained heated asphalt mixture.

A plurality of grooves 9 ... Are provided on the upper surface of the base layer 6 of the pavement 4 along the longitudinal direction of the road 1. These grooves 9 ... Have a width and a depth that allow piping of two heat radiation pipes to be buried, which will be described later, side by side, and are formed by cutting the base layer 6. And, at least the bottom of these grooves 9 ...
Is laid, and two heat radiating pipes 11 and 11 are placed on top of this heat insulating material 10.
Are installed side by side. Further, the groove 9 ... Is filled with heat-resistant resin mortar 12 so as to cover the radiating pipes 11 and 11 which are piped, and the radiating pipes 11 and 11 are fixedly held inside the groove 9. Has been done. Furthermore, the base layer 6
The surface layer 5 of the pavement 4 is formed on the upper part of the pavement body 4, and the radiating pipes 11, 11 are in a buried state.

The heat dissipation pipe 11 is formed of, for example, a steel pipe or a heat resistant synthetic resin pipe, and is arranged as shown in FIGS. 3 and 4. That is, 15 is a piping unit, which includes the inlet side headers 13a and 13b and the outlet side header 14
a, 14b, and the heat dissipation pipe 11
.. and consist of To describe the piping unit 15 in detail, one end 16a of one of the two radiating pipes 11 arranged in parallel is connected to the inlet header 13a, and the other end 16b is connected to the outlet header 14b. Also, the other end 17a
Is the inlet header 13b, and the other end 17b is the outlet header 14
connected to a. Therefore, this inlet side header 13
a, 13b, outlet side headers 14a, 14b and a plurality of heat radiating pipes 11
.. form a heat medium flow passage, and the road surface 2 of the pavement 4 can be heated by circulating the heat medium by means described later. In this case, the heat dissipation pipe 11
Are preferably arranged such that the flow directions of the heat mediums flowing therein are opposite to each other in the heat radiating pipes 11 adjacent to each other.

(The arrow in FIG. 3 indicates the flow direction of the heat medium.) Further, the inlet side headers 13a, 13b of the piping unit 15
Are connected to the heat medium supply pipe 19, and the outlet-side headers 14a and 14b are connected to the heat medium return pipe 20. The heat medium supply pipe 19 and the heat medium return pipe 20 are connected to a hot water supply source 18 as a heat medium supply source. That is,
22 is a boiler, the heat medium return pipe 20 is connected to the inlet of the boiler 22, and this outlet is connected to the suction port 25 of the pump 24 via the tank 23. Further, the discharge port 26 of the pump 24 is connected to the heat medium supply pipe 19 to form a heat medium circulation system path 27.

Therefore, the heat medium heated by the boiler 22 is temporarily stored in the tank 23, and the heat medium is supplied to the inlet side headers 13a and 13b of the piping unit 15 via the heat medium supply pipe 19 by driving the pump 24, and this inlet Side headers 13a, 13b
Are distributed and supplied to the respective heat radiation pipes 11 ... Then, the heat medium that has flowed through each of the heat radiation pipes 11 ...
And further returns to the boiler 22 via the heat medium return pipe 20. By thus circulating the heat medium in the circulation path 27, the surface layer 5 of the pavement 4, that is, the road surface 2 is heated. Therefore, snow and ice can be uniformly melted on the road surface 2, and walking and running of the vehicle can be improved.

Next, a construction method for making an existing paved road floor surface into a snow melting road floor surface will be described based on FIGS. 2 (A) to (F). (A) shows an existing pavement 4, which is composed of an upper layer portion 7 including a surface layer 5 and a base layer 6 and a lower layer portion 8. When the pavement body 4 is to be remodeled on a snow melting road floor surface, first, as shown in (B), the upper layer of a predetermined portion is cut to a predetermined depth, for example, the base layer 6 by cutting the surface layer 5 with a cutting machine or the like. To do. When the surface layer 5 is cut, the surface of the surface layer 6 is exposed,
An exposed cutting surface 6a is formed on the surface of the base layer 6. Next,
As shown in (C), grooves 9 ... For burying the radiating pipe 11 are formed in the exposed cutting surface 6a by a groover or the like in the longitudinal direction of the road 1 and at equal intervals. In this example,
The depth and width of the groove 9 are set so that the two heat radiating pipes 11 and 11 can be arranged side by side, and the heat insulating material 10 is laid on the bottom of the groove 9. At this time, a waterproof material (not shown) may be laid at the same time, or a waterproof heat insulating material may be laid.
Next, as shown in (D), each groove 9 provided with a heat insulating material 10
2 radiating pipes 11 and 11 are installed side by side. Groove 9
In order to protect the heat dissipation pipes 11 and 11 from the high heat of this asphalt or the pressure of the load roller, the upper parts of the heat dissipation pipes 11 and 11 are covered with resin mortar 12 as shown in (E). Covered by. Furthermore, the cutting exposed surface
Tack coat material consisting of asphalt emulsion on the surface of 6a 28
Apply. The tack coat material 28 is for improving the adhesive force between the base layer 6 and the surface layer 5.
Then, as shown in (F), the fine-grained asphalt concrete pavement is performed again to form the surface layer 5. As a result, the radiating pipes 11 ... Are accommodated between the surface layer 5 and the base layer 6 of the pavement 4 and inside the groove 9 provided in the base layer 6, and do not move during paving of the surface layer 5 and are constant. Will be piped to the pitch. The snow melting road floor obtained in this way has a predetermined depth from the road 2, for example,
The radiating pipes 11 ... Are buried in the depth of 60 to 70 mm, and as described above, the road surface 2 is heated by circulating the heat medium through the radiating pipes 11. Therefore, snow and ice can be uniformly melted on the road surface 2, and walking and running of the vehicle can be improved.

Although the groove is provided on the upper surface of the base layer in the above-mentioned embodiment, the groove may be provided in the surface layer. Further, in the above-mentioned one embodiment, the two heat radiation pipes are arranged side by side in the groove.
Two heat radiating pipes may be piped vertically in the groove, or one heat radiating pipe may be piped in each groove, and the groove may be formed in a meandering shape along the meandering groove. A heat radiating pipe may be installed.

Further, as the heat radiation pipe, a steel pipe or the like may be used instead of the heat resistant synthetic resin pipe. In this case, it is superior in heat resistance and pressure resistance to the synthetic resin pipe, and it is not necessary to protect it with resin mortar. Further, in order to increase the heating efficiency, a heat storage material such as sodium phosphate or sodium acetate may be arranged on or around the radiating tube.

〔The invention's effect〕

As described above, according to the present invention, a predetermined portion of the upper layer of an existing pavement is cut, and a groove for piping the heat radiation pipe is formed on the exposed surface of the cut pavement. The heat radiation pipes can be easily embedded in the existing pavement at regular intervals without using the pavement. Moreover, since only the exposed surface of the cutting has to be repaved, the material and labor can be saved. Therefore, there is an effect that the construction is easy and the snow melting road floor surface can be provided at a low price.

[Brief description of drawings]

The drawings show one embodiment of the present invention. FIG. 1 is a vertical sectional view of a road having a snow melting road surface, and FIGS. 2 (A) to (F) are sectional views showing a construction order, and FIG. Is a plan view of the piping unit, and FIG. 4 is a circulation system diagram of the heat medium. 1 ... Road, 2 ... Road surface (road surface) 4 ... Pavement, 5 ... Surface layer 6 ... Base layer, 9 ... Groove 10 ... Insulation material, 11 ... Radiant pipe 12 ... Resin mortar 18 ...... Heat medium supply source

Claims (4)

(57) [Claims] 1. A first layer in which an upper layer of a predetermined portion of an existing pavement is cut to a predetermined depth to form a plurality of grooves on an exposed surface of the cut.
And a second step of arranging a heat dissipation pipe for circulating a heat medium in the groove, and a third step of forming an upper layer on the upper surface of the cutting exposed surface and burying the heat dissipation tube. Characteristic method of construction of snow melting road floor. 2. The method for constructing a snow melting road surface according to claim 1, wherein a heat radiating pipe is installed after laying a heat insulating material at least at the bottom of the groove. 3. The method according to claim 1 or 2, wherein a resin mortar is provided on the upper portion of the heat radiating pipe arranged inside the groove to bury the heat radiating pipe, and then the upper layer is formed. Construction method of snow melting road floor. 4. A plurality of heat radiating pipes are arranged such that the heat mediums flowing through the heat radiating pipes are in opposite directions to each other in the heat radiating pipes adjacent to each other. Construction method of snow melting road floor as described in paragraph.