JP4122284B2 - Snow melting equipment - Google Patents

Description

  The present invention relates to a snow melting device.

  Conventionally, a snow melting device that melts snow by sprinkling with water nozzles scattered on the road surface has been proposed, but this snow melting device has a problem that it consumes a large amount of ground water and water spray is applied to pedestrians There's a problem.

  Therefore, in order to solve this problem, a snow melting device disclosed in Patent Document 1 in which water bodies leading out groundwater are scattered on the road surface has been proposed (hereinafter referred to as a conventional example).

Japanese Examined Patent Publication No. 2-45724

  However, since the above-mentioned conventional example is a snow melting device using scattered water bodies that are scattered (partially provided), the snow melting efficiency is poor, and further, groundwater derived from the water bodies flows on the road surface, and the vehicle passes. There was also a problem of water splashing on pedestrians.

  The present invention solves these problems, and provides a snow melting device excellent in practicality that can efficiently melt snow on the entire road surface.

  The gist of the present invention will be described with reference to the accompanying drawings.

A snow melting apparatus for melting snow by deriving a snow melting fluid 7 such as water of a predetermined temperature or groundwater from the road surface 1, and the road surface 1 is configured above a fluid non-passing layer 3 that does not allow fluid to pass therethrough. And a non-fluid layer 3 is provided with a snow melting fluid deriving body 4 for deriving the snow melting fluid 7 to the fluid deriving layer 2. An upper surface of the snow melting fluid deriving body 4 is provided with the snow melting fluid 4. A lead-out portion 5 for leading out the fluid 7 is opened, the top surface of the snow melting fluid lead-out body 4 and the top surface of the fluid non-passing layer 3 are set to be flush with each other, and the entire surface of the fluid lead-out layer 2 is The road surface 1 and the snow melting part are set, and a part of the fluid lead-out layer 2 is provided with a detaching member 2 ′ that can be removed to expose the flow rate adjusting / cleaning hole 10 provided in the snow melting fluid lead-out body 4. according to snow melting apparatus, characterized in that are Than is.

Moreover, the snow melting apparatus of Claim 1 concerns the snow melting apparatus characterized by the opening part 5a of the said derivation | leading-out part 5 being obstruct | occluded by the water-permeable member 9. FIG.

In addition, a snow melting device that melts snow by deriving a snow melting fluid 7 such as water at a predetermined temperature or groundwater from the road surface 1, and is provided above the fluid non-passing layer 3 that does not allow the fluid provided below the road surface 1 to pass therethrough. The fluid non-permeable layer 3 is provided with a snow melting fluid deriving body 4 for deriving the snow melting fluid 7 to the fluid deriving layer 2, and an upper surface of the snow melting fluid deriving body 4 is provided. The lead-out part 5 for leading out the snow melting fluid 7 is opened, and the opening part 5a of the lead-out part 5 is closed by a water-permeable member 9, and the upper surface of the snow-melting fluid lead-out body 4 and the fluid impervious layer are closed. 3 is set to be flush with the upper surface, and the entire surface of the fluid derivation layer 2 is set to the road surface 1 and the snow melting portion.

Moreover, the snow melting apparatus of any one of Claims 1-3 WHEREIN: The said fluid derivation | leading-out layer 2 concerns on the snow melting apparatus characterized by being formed with the water-permeable asphalt mixture.

Moreover, the snow melting apparatus of any one of Claims 1-4 WHEREIN: The surface of the said fluid derivation | leading-out layer 2 concerns on the snow melting apparatus characterized by being the roadway along which a vehicle passes.

Moreover, the snow melting apparatus of any one of Claims 1-5 WHEREIN : The said fluid derivation | leading-out layer 2 concerns on the snow melting apparatus characterized by the water permeability coefficient being 10 ^<-2 > cm / sec or more.

Moreover, the snow melting apparatus of any one of Claims 1-6 WHEREIN: The said fluid derivation | leading-out layer 2 concerns on the snow melting apparatus characterized by the Marshall stability being 3.5 KN or more.

The snow melting device according to any one of claims 1 to 7 , wherein the fluid lead-out layer 2 is provided with a negative gradient from a high part to a low part, and the snow melting fluid 7 from the snow melting fluid lead-out body 4 is provided. Is related to a snow melting device characterized in that it is led out at the highest part of the fluid lead-out layer 2.

Further, in the snow melting device according to any one of claims 1 to 8 , the snow melting fluid outlet body 4 is provided with one or a plurality of outlet portions 5 for leading the snow melting fluid 7. The present invention relates to a snow melting device.

  The snow melting device according to any one of claims 1 to 9, wherein a water spray or spring nozzle 8 is provided in the opening 5a of the lead-out portion 5. It is.

  In the present invention, a fluid outlet layer that constitutes a road surface is provided above a fluid-impervious layer provided below the road surface, and a snow melting fluid outlet for introducing the snow melting fluid into the fluid outlet layer is provided. The snow melting fluid is derived from the fluid outlet layer, and the snow on the road surface gradually melts from below, and the fluid non-passing layer does not dissipate the snow melting fluid underground, so the snow melting fluid is effectively used for melting snow. The amount of snow melting fluid derived from the snow melting fluid outlet can be suppressed.

  The preferred embodiment of the present invention will be briefly described with reference to the drawings.

  Since the snow melting fluid 7 derived from the snow melting fluid deriving body 4 passes between the fluid deriving layers 2 without being dissipated downward by the fluid non-permeable layer 3, and is derived from the surface (road surface 1) of the fluid deriving layer 2. Efficient snow melting is performed on the surface of the fluid lead-out layer 2 (road surface 1).

  The first embodiment shown in FIGS. 1, 2, and 3 will be described below.

  As shown in FIGS. 1, 2, and 3, the first embodiment is a case where the surface (road surface 1) of the fluid lead-out layer 2 is provided with a negative gradient from the central portion toward both edge portions. In the example, a snow melting fluid deriving body 4 is embedded at a position below the central portion, and a snow melting fluid 7 such as water or groundwater having a predetermined temperature is passed from the snow melting fluid deriving body 4 to the fluid deriving layer 2. This is a case where snow melting is performed on the entire surface of the fluid derivation layer 2 (entire surface of the road surface 1) derived from (road surface 1).

  The first embodiment will be described in detail.

  The road surface 1 is a roadway or a sidewalk, and a fluid outlet layer 2 is provided on the fluid impermeable layer 3.

  The fluid outlet layer 2 is a pavement layer having water permeability. Specifically, it is formed of a water-permeable asphalt mixture using slag or ball gravel as an aggregate. When this fluid derivation layer 2 is used as a vehicle passage portion, the strength required for vehicle passage is taken into consideration.

In the first embodiment, as a result of examining the strength and the hydraulic conductivity of the fluid derivation layer 2 necessary for vehicle traffic, the Marshall stability of the fluid derivation layer 2 is preferably 3.5 KN or more, and the hydraulic conductivity is 10 ⁻² cm. / Sec or more is confirmed to be desirable. When the Marshall stability is 3.5 KN or less, it is not preferable because there is a risk that the fluid outlet layer 2 may be damaged by the compressive force when the vehicle passes. When the water permeability is 10 ^-2 cm / sec or less, the snowmelt fluid 7 is not preferable because it cannot smoothly pass through the fluid lead-out layer 2 and snow melting on the surface of the fluid lead-out layer 2 becomes defective.

  The fluid impervious layer 3 is a pavement layer provided under the fluid outlet layer 2 and having substantially no water permeability. Specifically, among the heated asphalt mixture, it is formed of dense particle size asphalt or the like having a passage size of 2.36 mm sieve with a synthetic particle size of 30 to 50%.

  The snow melting fluid lead-out body 4 is a block body having a predetermined length made of concrete, and a water flow pipe 6 is provided inside the snow melting fluid 7 such as water at a predetermined temperature or groundwater through the water flow pipe 6. The snow melting fluid 7 introduced into the fluid outlet 4 is led out of the snow melting fluid outlet 4 from a lead-out portion 5 that is a lead-out conduit for one or a plurality of snow melting fluids 7 provided in the snow melting fluid outlet 4. The

  Further, the water conduit 6 is connected to a snow melting fluid supply source 11 such as a snow-melting well shown in FIG. In the figure, reference numeral 13 is a groundwater pump, reference numerals 14 and 15 are valves, and reference numerals 16 and 17 are drain pipes.

  The drain pipe 17 is provided in consideration of the case where the main pipe 12 and the water pipe 6 are cleaned, thereby facilitating maintenance.

  Next, the snow melting fluid outlet 4 of the first embodiment will be described in detail.

  The snow melting fluid lead-out body 4 shown in FIGS. 1 and 2 of the first embodiment is provided with a quadrangular cross-section, and is provided so that the upper part is located in the fluid lead-out layer 2 and the lower part is located in the fluid non-passage layer 3. The opening 5a of the lead-out portion 5 is opened, and the opening 5a is configured to be located in the middle of the fluid lead-out layer 2. The snow-melting fluid 7 is led out from the opening 5a on the top surface of the snow-melting fluid lead-out body 4. is doing.

  As described above, when the snow melting fluid 7 is led out from the opening 5 a located in the middle of the fluid lead-out layer 2, the snow melting fluid 7 passes through the gap of the fluid lead-out layer 2 and is led to the surface of the fluid lead-out layer 2. Therefore, the snow accumulation on the entire surface of the fluid lead-out layer 2 is melted.

  Further, when the opening 5a of the first embodiment is closed by a water-permeable member 9 as shown in FIG. 4, it becomes difficult for sand or dust from the road surface 1 to enter the opening 5a, and the opening 5a accordingly. Clogging is less likely to occur.

  Moreover, when the watering or spring nozzle 8 as shown in FIG. 5 is attached to the opening 5a of the first embodiment, the direction of the snow melting fluid 7 derived from the opening 5a can be adjusted. In other words, if a water spray or spring nozzle 8 is provided that adjusts the flowing direction of the snow melting fluid 7 so as to follow a negative gradient from the center portion of the fluid derivation layer 2 toward both edges, the snow melting fluid 7 becomes the fluid derivation layer. It moves smoothly and uniformly from the center of 2 to both edges. Furthermore, compared with the case where the opening 5a is simply provided on the upper part of the snow melting fluid outlet body 4 (FIGS. 1 and 2), it becomes difficult for sand or dust from the road surface 1 to enter the opening 5a. Clogging of the lead-out unit 5 is less likely to occur.

  In addition, when the snow melting fluid lead-out body 4 has a quadrangular cross section as in the first embodiment, it is very easy to pour and form the concrete. Therefore, workability when the snow melting fluid lead-out body 4 is formed by on-site construction. It will be excellent.

  Next, a second embodiment shown in FIG. 6 will be described below.

  The second embodiment is a snow melting apparatus similar to that of the first embodiment, and as shown in FIG. 6, the both sides of the snow melting fluid lead-out body 4 are formed in a triangular shape in cross section, and the opening of the lead-out portion 5 is formed in the sloping face. The portion 5 a is opened, and the opening 5 a is configured to be located in the middle of the fluid lead-out layer 2.

  Thus, the direction of the snow melting fluid 7 led out from the opening 5a can be adjusted by forming the snow melting fluid leading body 4 in a triangular cross section and providing the openings 5a on the inclined surfaces on both sides. . That is, the snow melting fluid 7 is led out from the openings 5a on the inclined surfaces on both sides, so that the flow direction of the snow melting fluid 7 is controlled so as to follow a negative gradient from the central portion of the fluid leading layer 2 toward both edges. Therefore, the snow melting fluid 7 moves smoothly and uniformly from the central portion of the fluid lead-out layer 2 to both edge portions.

  In addition, sand or dust from the road surface 1 is less likely to enter the opening 5a as compared with the case where the opening 5a is provided above, and the clogging of the lead-out portion 5 is less likely to occur. Further, when the opening 5a of the second embodiment is closed by the water-permeable member 9 or the sprinkling or spring nozzle 8 is attached as in the first embodiment, the lead-out portion 5 is less likely to be clogged. In addition, the direction of the snow melting fluid 7 led out from the opening 5a can be reliably adjusted.

  Further, a flow rate adjustment / cleaning hole 10 as shown in FIG. 7 is provided on the upper surface of the snow melting fluid outlet body 4 of the second embodiment, and a part of the fluid outlet layer 2 is formed above the flow rate adjustment / cleaning hole 10. When the detachable member 2 ′ is provided, the flow rate of the snow melting fluid 7 led out from the opening 5a can be easily adjusted, and even if the opening 5a is clogged, it can be easily cleaned. It can be performed and has excellent controllability and maintainability.

  The rest is the same as in the first embodiment.

  Next, a third embodiment shown in FIG. 8 will be described below.

  As shown in FIG. 8, the third embodiment uses the fluid outlet layer 2 as the road surface 1 and, like the first embodiment, below the center of the fluid outlet layer 2 provided with a negative gradient from the center toward both edges. The snow melting fluid lead-out body 4 is embedded in the fluid non-passing layer 3 in this position, and the snow melting fluid 7 such as water or groundwater having a predetermined temperature is led from the snow melting fluid lead-out body 4 to the fluid lead-out layer 2 and the fluid lead-out layer 2 The snow melting device is led to the surface (road surface 1) and melts snow on the entire surface of the road surface 1. The snow melting fluid lead body 4 of the third embodiment is configured so that the opening 5a of the lead portion 5 is connected to the fluid lead layer 2. This is a case where it is configured to be flush with the bottom.

  Thus, by deriving the snow melting fluid 7 from the opening 5 a that is flush with the bottom of the fluid deriving layer 2, the snow melting fluid 7 passes through the gap of the fluid deriving layer 2 and is derived to the surface of the fluid deriving layer 2. Then, the entire surface (road surface 1) of the fluid outlet layer 2 is melted. Further, in the third embodiment, the opening 5a is provided so as to be flush with the bottom surface of the fluid lead-out layer 2 (the top surface of the fluid non-passage layer 3), so that the fluid lead-out layer 2 is deteriorated or damaged. Even if replacement is necessary, it is possible to remove only the upper fluid discharge layer 2 while the snow melting fluid discharge body 4 is embedded in the fluid-impervious layer 3, thereby making it easier and less expensive to replace the fluid discharge layer 2. It is possible to reduce the cost, and the snow melting fluid outlet 4 can be used for a longer time.

  Moreover, when the opening part 5a of 3rd Example is obstruct | occluded with the water-permeable member 9 similar to 1st Example, it becomes difficult for sand, garbage, etc. to enter into this opening part 5a from the road surface 1, and it is the lead-out part 5 so much. Clogging is less likely to occur.

  Further, when a water spray or spring nozzle 8 as shown in FIG. 9 is attached to the opening 5a of the third embodiment, the direction of the snow melting fluid 7 led out from the opening 5a is adjusted as in the first embodiment. Furthermore, sand or dust from the road surface 1 is less likely to enter the opening 5a, and the clogging of the outlet 5 is less likely to occur.

  In the third embodiment, since the snow melting fluid lead-out body 4 has a quadrangular cross section, the workability when the snow melting fluid lead-out body 4 is formed by on-site construction is excellent as in the first embodiment.

  The rest is the same as in the first and second embodiments.

  Next, a fourth embodiment shown in FIG. 10 will be described below.

  The snow melting fluid lead-out body 4 of the fourth embodiment is a case where the opening 5a of the lead-out portion 5 is configured to be flush with the bottom of the fluid lead-out layer 2 as in the third embodiment. In the embodiment, as shown in FIG. 10, a lead-out portion 5 branched in a V shape from the water pipe 6 is provided, and the opening 5 a of the lead-out portion 5 branched in the V-shape is formed on the bottom and the surface of the fluid lead-out layer 2. This is a case where it is provided to be one.

  As described above, the opening 5a is provided so as to be flush with the bottom surface of the fluid outlet layer 2 (the upper surface of the fluid impermeable layer 3), so that the fluid outlet layer 2 is deteriorated or damaged as in the third embodiment. Even if it is necessary to replace the snow melt fluid lead-out body 4 with the snow melting fluid lead-out body 4 embedded in the fluid-impervious layer 3, only the upper fluid lead-out layer 2 is removed, so that the replacement work of the fluid lead-out layer 2 can be easily performed. This can be done at low cost, and the snow melting fluid outlet 4 can also be used for that long.

  Furthermore, the direction of the snowmelt fluid 7 led out from the opening 5a is adjusted by providing the opening 5a of the lead-out portion 5 branched in a V shape so as to be flush with the bottom of the fluid lead-out layer 2. Can do.

  That is, since the snow melting fluid 7 flows from the opening 5a, the flow of the snow melting fluid 7 can be controlled so as to follow a negative gradient from the high part to the low part of the fluid derivation layer 2. The fluid lead-out layer 2 moves smoothly and uniformly from a high part to a low part.

  In addition, as compared with the case where the opening 5a is provided on the upper side (FIG. 8), sand and dust from the road surface 1 are less likely to enter the opening 5a, and the outlet 5 is clogged accordingly. It becomes difficult. Furthermore, when the opening 5a of the fourth embodiment is closed by the water-permeable member 9, or the water spray or spring nozzle 8 is attached, the lead-out portion 5 is less likely to be clogged and is led out from the opening 5a. The direction of the snow melting fluid 7 can be adjusted reliably.

  Further, a flow rate adjustment / cleaning hole 10 as shown in FIG. 11 is provided on the upper surface of the snow melting fluid outlet body 4 of the fourth embodiment, and a part of the fluid outlet layer 2 is formed above the flow rate adjustment / cleaning hole 10. When the detachable detachable member 2 ′ is provided, the flow rate of the snow melting fluid 7 led out from the opening 5a can be easily adjusted, and even if the opening 5a is clogged, it can be easily cleaned. It can be made excellent in controllability and maintainability.

  Further, in the fourth embodiment, since the snow melting fluid lead-out body 4 has a quadrangular cross section, the workability when the snow melting fluid lead-out body 4 is formed by on-site construction can be improved as in the third embodiment.

  The rest is the same as in the first, second and third embodiments.

  As described above, since the first to fourth embodiments are configured as described above, the entire road surface 1 can be passed as the fluid derivation layer 2, and the conventional dotted (partially provided) flowers are used. Compared with the snow melting method, the snow melting efficiency can be significantly improved.

  In addition, in the conventional snow melting method with scattered water bodies (partially provided), when the snowfall stops and the operation of the snow melting device is stopped, the surface of the dense asphalt pavement where no water body is provided is provided. There is a problem that water accumulates and becomes a frozen road surface, causing danger to the passage of vehicles and pedestrians, or water on the pavement surface is scattered to pedestrians by the passage of vehicles, but in this embodiment, it has water permeability. Since the entire surface of the fluid derivation layer 2 is provided as a snow melting part as a roadway or a sidewalk, the snow melting fluid 7 derived from the fluid derivation layer 2 and the snowmelt water of the snow melted by the snow melting fluid 7 are the surface of the fluid derivation layer 2. Therefore, the accumulated snow-melting fluid 7 is scattered every time the vehicle passes and does not pass on the passers-by, and the snow-melting fluid 7 freezes on the surface of the snow-melting layer 2 so that the vehicle can pass. There is no danger.

  Further, since the lead-out portion 5 of the snow melting fluid lead-out body 4 is conventionally exposed on the surface of the road surface 1, the snow melting fluid lead-out body 4 in which dust such as sand on the road surface 1 is exposed during a period when the snow melting device is not used. There was a problem of entering the portion 5 and causing clogging easily. In addition, in order to remove this clogging, it is necessary to perform maintenance by forcing traffic restrictions, and there is a problem that maintenance costs are high, the danger of workers is high, and the smooth flow of traffic is hindered. However, since the snow melting fluid lead-out body 4 is embedded in the road surface 1 as in this embodiment, the lead-out portion 5 of the snow melting fluid lead-out body 4 is not clogged, and the conventional problem is solved. can do.

  Furthermore, since the snow melting fluid lead-out body 4 has been exposed on the road surface 1 in the past, it is likely to be damaged or deteriorated due to the influence of the traveling vehicle, and the pavement surface of the road surface 1 is uneven to obstruct the passage of the traveling vehicle or pedestrian. However, by embedding the snow melting fluid lead-out body 4 in the road surface 1 as in the present embodiment, it becomes possible to construct the pavement surface of the road surface 1 more evenly, such as a traveling vehicle or a pedestrian. The snow melting fluid lead-out body 4 itself is less likely to be damaged or deteriorated and the structural life of the snow melting fluid lead-out body 4 can be extended.

  Further, the snow melting fluid 7 introduced from the snow melting fluid outlet 4 does not flow downward by the fluid impervious layer 3 having no water permeability.

  Moreover, although the said 1st-4th Example is a case where the fluid derivation | leading-out layer 2 is provided in the minus gradient toward the both ends from the center part, this derivation | leading-out layer 2 is a one-sided gradient toward one end from the other end. In such a case, the shape of the snow melting fluid lead-out body 4 is appropriately changed so that the snow melting fluid 7 led out from the lead-out portion 5 follows a single gradient.

  As a result of actually melting snow on the road surface 1 and confirming the snow melting effect using the snow melting device of the second embodiment, it is possible to obtain a snow melting effect that is inferior to that of a conventional snow melting method that sprinkles water on dense pavement. It was confirmed.

  However, it was confirmed at the same time that the snowmelt effect might not be obtained due to a decrease in groundwater temperature if it was more than 4m away from the point where groundwater was passed. It has been confirmed that the problem can be solved by taking measures such as increasing the water flow rate by 10 to 20% or reducing the interval between the lead-out portions 5 compared to the water spray amount.

It is sectional drawing of the snow melting fluid derivation | leading-out body 4 of 1st Example. It is explanatory drawing of the use condition of 1st Example. It is a schematic diagram of a 1st example. It is sectional drawing of the snow melting fluid derivation | leading-out body 4 of another example of 1st Example. It is sectional drawing of the snow melting fluid derivation | leading-out body 4 of another example of 1st Example. It is sectional drawing of the snow melting fluid derivation body 4 of 2nd Example. It is sectional drawing of the snow melting fluid derivation | leading-out body 4 of another example of 2nd Example. It is explanatory drawing of the use condition of 3rd Example. It is sectional drawing of the snow melting fluid derivation body 4 of another example of 3rd Example. It is sectional drawing of the snow melting fluid derivation | leading-out body 4 of 4th Example. It is sectional drawing of the snow-melting fluid derivation body 4 of another example of 4th Example.

Explanation of symbols

DESCRIPTION OF SYMBOLS 1 Road surface 2 Fluid lead-out layer 2 'Removal member 3 Fluid impervious layer 4 Snow melting fluid lead-out body 5 Lead-out part 5a Opening part 7 Snow melting fluid 8 Sprinkling or spring nozzle 9 Water-permeable member
10 Flow adjustment / cleaning hole

Claims (10)

A snow melting device that melts snow by deriving a snow melting fluid such as water or groundwater at a predetermined temperature from a road surface, and a fluid outlet layer that constitutes the road surface above a fluid non-passing layer that does not allow fluid to pass below the road surface. A snow melting fluid deriving body for deriving the snow melting fluid to the fluid deriving layer is provided in the fluid non-permeable layer, and a deriving portion for deriving the snow melting fluid is opened on an upper surface of the snow melting fluid deriving body; Further, the upper surface of the snow melting fluid outlet and the upper surface of the fluid impervious layer are set to be flush with each other, and the entire surface of the fluid outlet layer is set to the road surface and the snow melting portion . A snow melting device characterized in that a part of the snow melting device is provided with a removing member that can be removed to expose a flow rate adjusting / cleaning hole provided in the snow melting fluid outlet . The snow melting apparatus according to claim 1, wherein the opening of the lead-out portion is closed by a water-permeable member. A snow melting device that melts snow by deriving a snow melting fluid such as water or groundwater at a predetermined temperature from a road surface, wherein a fluid outlet layer that constitutes the road surface is provided above a fluid non-passing layer that does not allow fluid to pass below the road surface. A snow melting fluid deriving body for deriving the snow melting fluid to the fluid deriving layer is provided in the fluid non-permeable layer, and a deriving portion for deriving the snow melting fluid is opened on an upper surface of the snow melting fluid deriving body; The opening of the lead-out portion is closed by a water-permeable member, and the upper surface of the snow melting fluid lead-out body and the upper surface of the fluid non- passage layer are set to be flush with each other, and further, the entire surface of the fluid lead-out layer Is set on the road surface and the snow melting portion. The snow melting apparatus according to claim 1 , wherein the fluid lead-out layer is formed of a water-permeable asphalt mixture. 5. The snow melting device according to claim 1 , wherein a surface of the fluid lead-out layer is a roadway on which a vehicle passes. 6. The snow melting device according to claim 1 , wherein the fluid lead-out layer has a water permeability coefficient of 10 ⁻² cm / sec or more. 7. The snow melting device according to claim 1 , wherein the fluid lead-out layer has a Marshall stability of 3.5 KN or more. The snow melting device according to claim 1 , wherein the fluid lead-out layer is provided with a negative gradient from a high part to a low part, and the snow melt fluid from the snow melt fluid lead-out body is the fluid lead-out layer. A snow melting device configured to be derived at the highest part of the snow. 9. The snow melting device according to claim 1 , wherein the snow melting fluid lead-out body is provided with one or a plurality of the lead-out portions that lead out the snow melting fluid.   The snow melting device according to any one of claims 1 to 9, wherein a water spray or spring nozzle is provided at an opening of the lead-out portion.

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