JPH0674860U - Road surface anti-icing device in tunnel - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent the road surface from freezing in the tunnel. [Structure] The underdrain 13 is buried below the road surface S in the tunnel, and the spring water W flowing out into the tunnel T is caused to flow into the underdrain 13. Each condensing part 11 of the heat pipe 11
b is arranged immediately below the road surface S in the tunnel, and the heat of the spring water W in the tunnel T is effectively used to heat the road surface S in the tunnel T to prevent freezing.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a device that uses a heat pipe and uses spring water as a heat source to prevent freezing of roads and sidewalks in tunnels.

[0002]

[Prior art]

 In winter, when the outside air below the freezing point blows into the surface of the road that runs through the tunnel, the groundwater that has leaked into the tunnel and the water such as snow that has adhered to the tires of the vehicle freezes. There was a risk of slipping accidents of vehicles passing by or causing pedestrians to fall. Therefore, it often springs into the tunnel, and the prevention of freezing of the road surface inside the tunnel has been conventionally performed using spring water that maintains a water temperature of 10 to 15 degrees Celsius throughout the year.

As shown in FIG. 3, immediately below the road surface S in the tunnel T (inside the surface pavement layer), a water pipe 1 is buried in a zigzag shape in a zigzag manner. One end (the left end in FIG. 2) on the upstream side of the water pipe 1 where the pump 2 is provided is disposed in the spring water W flowing down in the gutter 3 in the tunnel, and the other end side of the water pipe 1 is arranged. Are open to the downstream side of the gutter 3. Then, the spring W drawn by the pump 2 is circulated in the water pipe 1 and the road surface is heated by the heat of the spring W to prevent freezing of water on the road surface in this tunnel.

[0004]

[Problems to be solved by the device]

 However, in the case of the above-mentioned conventional road surface anti-icing device in a tunnel, the spring water W flowing through the gutter 3 is pumped up by the pump 2 and circulated through the water pipe 1, so that electric power for driving the pump 2 is required. In addition, the switch of the pump 2 needs to be turned on and off according to the road surface temperature, and maintenance of the pump 2 is required, which causes a running cost.

Further, when the spring water W pumped up by the pump 2 flows through the water pipe 1, the heat is gradually taken away to lower the water temperature, so that the downstream side of the water pipe 1 freezes due to insufficient temperature of the spring water W. There was a risk that prevention would be insufficient.

Further, in the conventional road surface anti-icing device for tunnels using spring water, since the gutters through which the spring water flows are provided on the road side in the tunnel, the limited space in the tunnel is used for the gutters. There was an inconvenience that it was taken and the road width became narrow.

The present invention has been made in view of the above problems, and can be installed without reducing the width of the road in the tunnel, does not require running costs, and is easy to maintain and inspect the road surface freeze prevention in the tunnel. The purpose is to provide a device.

[0008]

[Means for Solving the Problems]

 As a means for solving the above-mentioned problems, the present invention is to provide a culvert under the tunnel road surface for the flow of spring water in the tunnel, and to condense a heat pipe in which the evaporation part is immersed in the spring water flowing in the culvert. The portion is arranged directly below the road surface in the tunnel.

[0009]

[Action]

 As described above, by providing a culvert under the road surface inside the tunnel, the temperature of the spring water can be prevented from lowering by flowing the spring water as a heat source for freezing prevention, and the entire space inside the tunnel can be used as a road. Since the evaporation part of the heat pipe was immersed in the spring water flowing in the underdrain provided under this road surface, and the condensation part of this heat pipe was arranged directly under the road surface, the heat of the spring water in the tunnel was It is absorbed by the evaporation part of the heat pipe, transported to the condensation part and released, and this heat heats the road surface to prevent freezing.

[0010]

【Example】

 An embodiment of the road surface anti-icing device in a tunnel according to the present invention will be described below with reference to FIGS. 1 and 2.

This road surface anti-icing device includes a culvert 13 buried under a pavement layer on a road surface S in a tunnel T in a direction connecting openings at both ends of the tunnel, and a spring W flowing in the culvert 13. The evaporation section 11a is dipped therein, and the condensation section 11b is composed of a plurality of heat pipes 11 arranged directly below the road surface S in the tunnel T, respectively.

The underdrain 13 is laid under the road surface approximately in the center in the width direction of the road surface S inside the tunnel in a direction connecting both exits of the tunnel T, and inside the underdrain 13 outside the lining layer of the tunnel T 1. Spring W flowing in via a drainage channel (not shown) provided on the (ground side) and spring leaching into the tunnel T are collected and flowing. As shown in FIG. 2, each of the heat pipes 11 has a shape in which the lower side of the U-shape is bent by 90 degrees in the horizontal direction, and the left side of the both side walls of the underdrain 13 is formed. The lid 13a is vertically penetrated at a position alternately approaching one of the inner surfaces on the right side to immerse the evaporating portion 11a on the lower end side thereof in the spring water W, and in the spring W, the underdrain 13 They are arranged in the laying direction and parallel to the bottom surface.

The condensing portion 11b on the upper end side of each heat pipe 11 is a portion that penetrates the lid 13a and extends upward, in a direction in which the upper part of the underdrain 13 is crossed alternately left and right, that is, the right side of the underdrain 13. The condensing part 11b of the heat pipe 11 penetrating the lid 13a near the wall is bent substantially horizontally to the left, and conversely, the condensing part 11b of the heat pipe 11 penetrating the lid 13a near the left wall is rightward. In the surface pavement layer of the road surface S, the working fluid condensed inside in the surface pavement layer of the road surface S in a direction substantially perpendicular to the laying direction of the underdrain 13 (road width direction) is subjected to the action of gravity. It is arranged with a slight gradient so as to flow back to the evaporation section 11a.

Next, the operation of this embodiment configured as described above will be explained. Since the underdrain 13 for flowing down the spring water W is provided below the pavement layer on the road surface S in the tunnel, the tunnel All the space in T can be used as a road, and the spring water W in the underdrain 13 does not easily lose heat. Then, in each heat pipe 11 in which each evaporation portion 11a is immersed in the spring water W in the underdrain 13, the heat of the spring water W (about 10 to 15 degrees Celsius) heats the enclosed working fluid. Evaporate. Then, the working fluid becomes vapor and moves to the condensing part 11b, where it radiates heat and condenses. Therefore, the road surface S in the tunnel is heated by the heat released in the condensing part 11b, and the freezing of water on the road surface is prevented.

In particular, in this embodiment, the condensing section 11 b of each heat pipe 13 extending from the underdrain 13 provided under the central road surface in the tunnel T is arranged so as to straddle the upper side of the underdrain 13. Since they are alternately arranged in the right direction and the left direction, the portion of the road surface S in the tunnel above the underdrain 13 is also heated, and the road surface can be prevented from freezing.

In the above-described embodiment, the underdrain 13 is buried in the tunnel T at approximately the center thereof. However, the underdrain 13 is buried in the tunnel T at a position biased to one of the left and right sides and springs therein. You may make it flow water W.

[0017]

[Effect of device]

 As described above, the road surface anti-icing device in a tunnel according to the present invention is provided with a culvert for the flow of spring water under the road surface in the tunnel, and a heat pipe with a steaming part immersed in the spring water flowing in the culvert. Since the condensing unit is arranged directly below the road surface in the tunnel, the device can be installed without reducing the space in the tunnel. In addition, the heat of the spring water that springs into the tunnel can be effectively used to prevent the road surface inside the tunnel from freezing, and there is no need to draw water etc. from other places as a heat source, so equipment costs are low. Moreover, it has advantages such as low running cost and easy maintenance.

[Brief description of drawings]

FIG. 1 is a sectional view of a tunnel showing an installed state of an embodiment of a road surface anti-icing device in a tunnel according to the present invention.

2 is a perspective view of the device shown in FIG. 1. FIG.

FIG. 3 is an explanatory diagram showing an example of a conventional road surface anti-icing device in a tunnel.

[Explanation of symbols]

11 ... Heat pipe, 11a ... Evaporating part, 11b ... Condensing part, 13 ... Underdrain, W ... Spring water.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Creator Tadao Yamada 151, 1007 Izumisawa, Chitose-shi, Hokkaido 151 Fujikura, Hokkaido

Claims (1)

[Scope of utility model registration request] 1. An underdrain for the flow of spring water in the tunnel is provided below the road surface in the tunnel, and a condensing part of a heat pipe in which the evaporation part is immersed in the spring water flowing in the underdrain,
A road surface anti-icing device in a tunnel, which is arranged immediately below the road surface in the tunnel.