JP2570021Y2 - Ice pillar prevention equipment in tunnel - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a facility for preventing groundwater leaking from the inner wall of a tunnel from freezing in winter to form icicles (icicles).

[0002]

2. Description of the Related Art Since icicles hanging in a tunnel in winter cause traffic obstacles and damage to a concrete structure, various means for preventing the formation of icicles have been attempted. In other words, the icicles in the tunnel are formed by the cooling and freezing of the groundwater that seeps into the inner wall of the tunnel due to the cold air that blows into the tunnel. The formation of icicles is prevented by such means as doing so.

[0003]

As described above, in the method of keeping the inner wall of the tunnel warm or heating, among the means for preventing the formation of icicles, for example, an electric heater or the like is provided at the wellhead of the tunnel where icicles are easily formed. Although it is conceivable to install a heating element, it is possible that icicles may be formed not only at the pit but also near the pit due to the groundwater seeping from the outside of the tunnel. It is necessary to provide a heating element such as an electric heater in the range, and there has been a problem that equipment costs increase and running costs also increase. There is also a method in which a door is provided at the entrance of the tunnel so that it can be closed, and by closing this door, cold air is prevented from being blown to prevent icicles from being formed. However, there is a problem that the door needs to be opened and closed, which is troublesome.

The present invention has been made in view of the above circumstances, and prevents the formation of icicles with a small equipment cost.
It is an object of the present invention to provide a facility for preventing icicles in a tunnel, which requires no maintenance and requires little running cost.

[0005]

SUMMARY OF THE INVENTION As a means for solving the above-mentioned problems, the present invention is directed to an icicle prevention facility in a tunnel for preventing groundwater leaking from the inner wall of the tunnel from freezing and forming icicles. Of the inner wall of
With groundwater is formed toward the groove so as to pass through the portion that leaks in the vertical direction, the grooves in a state of condensation of the heat pipe which is disposed the evaporator section to the heat source, which is higher than the front evaporation unit side
Icicle prevention equipment in a tunnel characterized by being fitted inside.

[0006]

As described above, the device for preventing icicles in the tunnel of the present invention has a groove formed vertically so as to pass through a portion of the inner wall surface of the tunnel where groundwater leaks, and the evaporating portion of the heat pipe is formed. It was installed in the geothermal area of the underground high-temperature part or a heat collecting place such as a solar heat collecting plate, and the condensing part at the top of this heat pipe was fitted in the groove , so it leaked into the tunnel.
Groundwater is collected in a trench formed on the inner wall of the tunnel.
As well as heat transfer due to surface tension.
While flowing down the gap between Ip and the heat pipe
They are heated by the heat radiation. As a result, freezing is prevented
You.

[0007]

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS. 1 to 3. FIG.

[0009] The icicles formed in the tunnel are formed by cooling and freezing the groundwater exuding from the inner wall of the tunnel, so that the exuded water flows downward without stagnation on the surface of the inner wall. If it flows or drip immediately without stagnation on the inner wall surface,
Since the cooling time is short, icing hardly occurs, and there is such a characteristic that when oozing out and spreading on the surface little by little, cooling and icing are easy. Therefore, as shown in FIG. 1, the inner wall surface 1a of the tunnel 1 is provided on the inner wall surface 1a of the tunnel 1 in the circumferential direction.
Are formed with a plurality of grooves 2 having a rectangular cross section. These grooves
2 has a shrink portion 3a of the heat pipe 3 fitted therein.
You. That is, each groove 2 is provided in the condensing portion 3a of the heat pipe 3.
Is formed in an inner dimension to fit the inside. On the other hand, the evaporation portion 3b of the heat Topaipu 3 is disposed in the geothermal collecting portion of the deep underground. Each of the heat pipes 3 evaporates the working fluid sealed in the pipes by heating the respective buried evaporating sections 3b by geothermal heat,
The vapor moves to the condensing section 3a, and the condensing section 3a disposed in the groove 2 emits the heat transported as latent heat of evaporation.

Next, the operation of this embodiment constructed as described above will be described. Groundwater leaking near the entrance of the tunnel 1 leaks into the groove 2 formed on the inner wall surface, Groundwater that has oozed into the surrounding area
And flows into the groove 2. Therefore, leaked water is collected in the groove 2 and flows down in the groove 2. When the leaked water flowing in the groove 2 is cooled down to the freezing temperature due to the cool air blown from the wellhead in the severe cold season, the condensing portion 3a of the heat pipe 3 provided in the groove 2 Is heated by the heat radiation of the
As a result, formation of an icicle near the wellhead can be prevented.

In this embodiment, since the outside diameter of the condensing portion 3a of the heat pipe 3 is set to a size that fits inside the groove 2 formed on the inner wall surface 1a, the leakage water collected in the groove 2 is reduced. Due to the surface tension, the water flows down along the gap between the inner surface of the groove 2 and the outer peripheral surface of the heat pipe 3, so that the water does not flow out of the groove 2 and freeze.

Further, in the above embodiment, the case where the evaporating section 3b of the heat pipe 3 is inserted deep underground in the vertical direction to utilize the geothermal energy has been described. Alternatively, for example, the heat pipe 13 shown in FIG. As described above, the evaporating section 13b may be inserted into the ground outside the tunnel 1 so as to utilize geothermal energy.

Further, as also shown in FIG. 3, a solar heat collecting plate 24 is provided on the outer surface of the wellhead of the tunnel 1 or at a low place where the sunshine is good around the wellhead, and a groove formed in the inner wall surface of the tunnel 1 is formed in 1a. The evaporating section 23b of the heat pipe 23 in which the condensing section 23a is disposed in the solar heat collecting plate 24
By being mounted so as to be able to transfer heat, icicles can be prevented from being formed using solar heat as a heat source. Also,
In each of the above embodiments, the condensers 3a,
Since the grooves 13a and 23a are provided in the groove 2, useless heat radiation to the atmosphere can be prevented.

In the above embodiment, the case where the groove 2 is formed in the inner wall surface 1a of the tunnel 1 in the circumferential direction has been described, but this groove is formed in a non-horizontal state in the longitudinal direction of the tunnel 1, The condensing portion of the heat pipe may be accommodated in this groove.

[0015]

As described above, according to the present invention, the groundwater on the inner wall surface of the tunnel leaks in the icicle prevention equipment in the tunnel for preventing the groundwater leaking from the inner wall of the tunnel from freezing and forming an icicle. and forming towards the groove so as to pass through the portion in the vertical direction, the condenser portion of the heat pipe which is disposed the evaporator section to the heat source, rather higher than the evaporation unit side
In this state, an electric heater or the like is not required, so that an icicle can be prevented from being formed with a small facility cost, and maintenance and management are not required, and the running cost is almost negligible. Icicle prevention equipment. In addition, by using the heat pipe that fits inside the groove, the leak water can flow down the groove.

[Brief description of the drawings]

FIG. 1 is an explanatory view showing an entrance of a tunnel showing one embodiment of an icicle prevention device of the present invention.

FIG. 2 is a horizontal sectional view of an inner wall surface of a tunnel.

FIG. 3 Explanatory drawing showing a modification for using different heat sources
It is.

[Explanation of symbols]

2 ... groove, 3 ... heat pipe, 3a ... condensing part, 3b
... evaporator, 13 ... heat pipe, 23 ... heat pipe, 24 ... solar heat collecting plate.

 ────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Shuichi Matsumoto 1-5-1, Kiba, Koto-ku, Tokyo Fujikura Electric Wire Co., Ltd. -6160 (JP, B2)

Claims (1)

(57) [Scope of request for utility model registration] 1. A icicles prevention equipment in the tunnel groundwater leaking from the tunnel inner wall is prevented from an icicle by freezing, the groove so as to pass through the portion where groundwater is leakage of the inner wall surface of the tunnel Prevention of icicles in a tunnel, characterized in that the heat pipe is formed vertically and the condensing part of a heat pipe having an evaporating part disposed on the heat source is fitted in the groove in a state higher than the front evaporating part. Facility.