JPH07224414A - Anti-mist countermeasure and facility for roadway - Google Patents

Abstract

PURPOSE:To prevent intrusion of mist by installing an airtight panel along each side of a roadway, and forming an air curtain in the area between the two panels when mist is generated. CONSTITUTION:When mist is generated, a drive motor is started, and external air compressed by a blower 6 is supplied to a duct 5 via a wind sending pipe 8 and distribution pipe 9. The compressed air is spouted from a nozzle 10 to over the central part of the road so that an air curtain is generated, and the area over the road space Y is shielded from the external air. Thereby the road space is shielded with the air curtain and a wind panel 3, and thereby external air containing mist is precluded from intruding to the space.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a motorway facility such as a highway, and more particularly to a countermeasure method and a fog-prevention facility for preventing a collision accident due to a thick fog.

[0002]

2. Description of the Related Art As is well known, it is very dangerous to drive a car in fog because the driver's view is obstructed. As it decreases over time, it is likely to cause a serious accident. In other words, when driving at high speeds, a large amount of fog drops hit the windshield, resulting in poorer visibility than when driving at low speeds, and even when the driver discovers a preceding vehicle or obstacle, these preceding vehicles are avoided. Since the time that can be created is shortened, the risk is high, and at night, the light from the headlight diffuses into the fog droplets, causing a so-called "light curtain phenomenon", which reduces the contrast in the front and reduces the visibility of the driver. The distance will be extremely degraded.

From this point of view, the administrator of the expressway takes measures to prevent accidents such as speed limit and road closure depending on the visibility when fog occurs. Loss has occurred.

This situation will be described in detail with reference to FIG. 5, which is a road map showing the relationship between the altitude and distance of the Kan-etsu Expressway and National Highway No. 17 that extends substantially parallel to it. It is understood that the dense fog around this area frequently occurs throughout the year in the Akagi Plateau of the Kan-etsu Expressway and in the Misaka-Ohashi area of National Route 17, which is a general road. For example, according to the statistics of the expressway administrator in 1993, due to the thick fog in the Akagi Plateau area, Kanetsu Motors has been closed for about 40 times (about 500 hours),
Due to the detour to Route 17, etc., time and economic loss are emphasized. Of course, such a thick fog is on the highway 17
Although it has also occurred in the Misaka Ohashi area of the issue, only measures to display a warning sign for fog generation are taken on general roads.

In order to ensure the visibility of the road condition at the time of fog as described above, it has been attempted to arrange a large number of halogen spotlights A along the median strip B as shown in FIG. ing. That is, these spotlights A are attached to a pole C having a height of about 1.5 m, and are aimed at an angle of 120 degrees in the traveling direction of the automobile and 77 degrees with respect to the vertical direction without causing a curtain phenomenon. In addition, the road surface D and the rain mark E are intended to be locally illuminated.

[0006] However, even if such a countermeasure using the spotlight A is effective in improving the visibility of the road surface condition when fog occurs, it is almost ineffective when the fog occurs, so that when the fog with a visibility of 50 m or less occurs. It wasn't a measure against traffic closure.

Further, as a drastic countermeasure against fog, it may be considered to construct a tunnel-shaped structure at the location where the fog occurs, but this tunnel structure not only requires a high facility cost but also a long tunnel. There is also a problem in terms of exhaust.

[0008]

SUMMARY OF THE INVENTION An object of the present invention is to provide a drastic countermeasure against fog in view of the current state of the conventional fog countermeasures for motorways as described above, and to compare construction costs and maintenance costs. It is to obtain a fog countermeasure method and a fog-prevention equipment for an inexpensive motorway.

[0009]

In order to achieve this object, the present invention provides airtight panels along both sides of a fog-prone motorway and provides air between the tops of these airtight panels when fog occurs. This paper proposes a fog countermeasure method for automobile roads that forms a curtain to shield the road space from outside air containing fog.

That is, according to such a fog countermeasure method,
Normally, the outside air can be automatically introduced into the road space, and the intrusion of fog into the road space can be prevented by the air curtain, so that the visibility of the driver can be drastically improved.

According to the present invention, in this method for preventing fog on a motorway, a large number of columns are installed on both sides of the road which is longer than the fog generating section of the motorway, and the columns are connected by windproof panels. An air jet nozzle for partitioning the outside world and the road space, installing a compressed air duct to which compressed air is supplied across the upper portions of the columns on both sides, and forming an air curtain in the space above the open road surface is provided. It will be embodied as a fog-proof facility for automobile roads formed in a compressed air duct. The compressed air duct of this fog-proof equipment is divided into a plurality of parts in the lengthwise direction, and compressed air is supplied to each of these compressed air duct pipes from a blower, so that repair of failures and maintenance management work become advantageous.

Further, since the outside air at the time of fog generation contains a large amount of water, in an actual anti-fog equipment, a dehumidifier for removing the water contained in the outside air is connected to the suction side of the blower, It is possible to prevent fog from occurring in the road space.

[0013]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the embodiments of the present invention will be described below with reference to FIGS. 1 to 3 show the fog-prevention equipment according to the first embodiment of the present invention applied to a highway, the fog-prevention equipment of the present invention may be applied to other general roads.

The fog-prevention equipment of the first embodiment is provided in a portion longer than the fog-generating section of the motorway, and the length of the road is above the earthwork part foundations 1A and 1B on both sides of the road X. A large number of columns 2A and 2B aligned in the direction are provided. A space between the columns 2A and 2B is covered with a windproof panel 3 as an airtight panel for blocking outside air. These windproof panels 3 also serving as windbreak panels are not limited, but may be made of a transparent or translucent resin panel in order to give an occupant a feeling of liberation.

The upper portions of the columns 2A and 2B of each row are connected by a pedestal 4 extending in the lengthwise direction of the road, and a compressed air duct 5 shown as a capacity type air duct is connected to the pedestals 4 on the road. It is supported in a state of being extended in the length direction. These compressed air ducts 5 in the illustrated embodiment consist of compressed air duct tubes 5a of fixed length and closed at both ends. As will be understood later, this structure is for facilitating obtaining a uniform airflow structure for each constant section and for facilitating failure repair and maintenance management.

Each of the compressed air duct pipes 5a is provided with a blower 6 positioned outside the windbreak panel 3, and the blower 6 is driven by a drive motor 7 when fog is generated. Blower pipes 8 standing up in a substantially vertical direction are joined, and compressed air is supplied to each compressed air duct 5 via a distribution pipe 9 on the gantry 4 connected to these blower pipes 8.

On the other hand, in each of the compressed air ducts 5 on both sides, air jet nozzles 10 directed upward in the central portion of the road are formed, and the air jets ejected from these air jet nozzles 10 make the road space Y An air curtain is formed above, and the air curtain prevents outside air containing fog from entering the road space Y.

Although a slit nozzle is used for forming such an air curtain, a structure as shown in FIG. 3 can be adopted as a uniform air flow structure.
That is, (a) of FIG. 3 arranges a plurality of rectifying plates 11 inside the compressed air duct 5A to make the air jets from the air jet nozzles 10A uniform, and (b) shows the compressed air duct 5A.
The volume of the internal space of B is made sufficient to make the air jet from the air jet nozzle 10B uniform, and (c) makes the diameter of the air jet nozzle 10C itself sufficiently smaller than the diameter of the compressed air duct 5C. Although it is a structure, any of these structures can be adopted in the present invention.

Since the fog-prevention equipment according to the first embodiment has the above-described structure, the drive motor 7 is started when the thick fog is generated, and the outside air compressed by the blower 6 is blown by the blower pipe 8 and the distribution pipe. Only by supplying the compressed air duct 5 via 9, it is possible to prevent the outside air containing fog from entering the road space Y. That is, since both sides of the road space Y are shielded from the outside by the windbreak panel 3, the air curtain formed by the air jets from the air jet nozzles 10 shields the upper part of the road space Y from the outside air, thereby preventing fog. It is possible to completely prevent the included outside air from entering the road space Y, and prevent the deterioration of the visibility in the road space Y due to fog.

In this case, the thick fog is often generated under the condition of no wind or several meters of wind speed, and it rarely occurs under the meteorological condition of a wind speed of 10 m or more. Does not defeat and the air curtain works well.

Of course, it is not necessary to start the drive motor 7 except when a thick fog is generated, so the running cost is low. That is, in a normal state, the upper part of the road space Y is open to the outside air, so not only is there a feeling of openness,
Since the convection between the road space Y and the outside air naturally occurs,
There is no need for special ventilation equipment.

FIG. 4 shows a fog-prevention equipment according to a second embodiment of the present invention. This fog-prevention equipment has a feature that the visibility in the road space Y can be further improved. That is, the fog-prevention equipment is provided with a large number of arched poles 2L and 2R (posts) arranged on the foundations 1L and 1R of the earthwork part on both sides of the road surface, and between the arched poles 2L and 2R, the windbreak panel 3 described above is provided. It is shielded by the same windproof panel 3A as.

The arch-shaped poles 2L and 2R in each row
A compressed air duct 5A having a rectangular cross section extending in the lengthwise direction of the road is hung between the upper portions of the above, and an air curtain is formed by the air jets from the air jet nozzles 10A formed in these compressed air ducts 5A.

For each compressed air duct 5A,
Although the compressed air from the blower 6A is supplied through the blower pipe 8A, the dehumidifier 12 having the filter 12a and the warmer 13 are coupled to the suction ports of these blowers 6A. That is, although the outside air is taken into the dehumidifier 12, the outside air including fog contains a large amount of water, and therefore dew condensation may occur. Therefore, the dehumidifier 1
After the mist of the outside air is condensed by the second filter 12a and the water is distributed from the drain 12b, the warmer 13 having the heater 13a is provided.
By heating at, a dry air curtain can be formed.

The heater 13 having a heater may be a heat exchanger for recovering waste heat of the drive motor 7 and the like, and the fog-preventing equipment of each of the above-mentioned embodiments can prevent snow accumulation in the road space. It also functions as a snow damage prevention structure.

Since the fog-prevention equipment according to the second embodiment has the above-mentioned structure, the road space Y is formed by the air curtain formed by the air jets jetted from the air jet nozzles 10A of both the compressed air ducts 5A when the fog is generated. As in the case of the first embodiment, it is possible to prevent the fog from entering the road space Y and improve the visibility of the road space Y because the outside air can be blocked.

In the fog-prevention equipment according to the second embodiment, when the fog is generated, the moisture of the outside air having high humidity is removed by the dehumidifier 12, and then the blower 6 sends the compressed air to the compressed air duct 5A. Even in the case of low, it is possible to prevent fog generation and dew condensation in the road space Y. In this case, it is obvious that if the warmer 13 is attached to the suction side of the blower 6, the dew condensation phenomenon and the fog generation in the road space Y can be sufficiently suppressed.

[0028]

As is apparent from the above description, according to the present invention, the air curtain formed when fog occurs completely shuts off the outside air containing fog from the road space, and the thick fog enters the road space. Therefore, the visibility of the road space can be maintained in a good state, and the time and economic loss due to the traffic regulation and traffic closure can be prevented. Further, the fog-preventing equipment for an automobile road according to the present invention has a lower equipment cost than the tunnel structure and requires only a remote operation of the blower, which is advantageous in terms of running cost.

[Brief description of drawings]

FIG. 1 is a plan view of essential parts of a fog-prevention facility for a motorway according to a first embodiment of the present invention.

FIG. 2 is an enlarged cross-sectional view of the fog-prevention equipment for the motorway taken along line 2-2 in FIG.

3 (a), (b) and (c) are schematic views of an air flow homogenizing duct used in a fog-proof facility on the motorway.

FIG. 4 is a cross-sectional view corresponding to FIG. 2 of a fog-prevention facility for a motorway according to a second embodiment of the present invention.

FIG. 5 is a road map of the main part of the Kanetsu Expressway showing the relationship between altitude and distance.

6 (a) and 6 (b) are a plan view and a sectional view of a main part of a conventional measure for improving the visibility by a spotlight.

[Explanation of symbols]

 X Road surface Y Road space 1A, 1B, 1L, 1R Earthwork part foundation 2A, 2B Strut 2L, 2R Arched pole 3 Windbreak panel 5, 5A Compressed air duct 6, 6A Blower 10, 10A Air jet nozzle 12 Dehumidifier 13 Heating vessel

Claims (4)

[Claims] 1. Airtight panels are installed along both sides of an automobile road where fog is likely to occur, and when fog occurs, an air curtain is formed between the tops of these airtight panels to shield the road space from outside air containing fog. A method for preventing fog on a motorway, characterized by: 2. A large number of columns are installed on both sides of the road which is longer than the fog generating section of the motorway, and these columns are connected by windproof panels to partition the outside world and the road space. A compressed air duct that is supplied with compressed air over the upper part is attached, and an air jet nozzle that forms an air curtain in the space above the open road surface is formed in these compressed air ducts. Anti-fog equipment. 3. A large number of columns are installed on both sides of the road which is longer than the fog generating section of the motorway, and these columns are connected by windproof panels to partition the outside world and the road space. In a fog-prevention equipment for an automobile road, in which compressed air ducts to which compressed air is supplied are attached between the upper parts, and air jet nozzles that form an air curtain in the space above the open road surface are formed in these compressed air ducts. The above-mentioned compressed air duct is divided into a plurality in the length direction, and compressed air is supplied from a blower to each of these compressed air duct pipes. 4. A large number of columns are installed on both sides of the road, which is longer than the fog-generating section of the motorway, and the columns are connected to each other by windproof panels to partition the outside world from the road space. A plurality of compressed air duct pipes supplied with compressed air from a blower are mounted between the upper parts, and air jet nozzles that form an air curtain in the space above the open road surface are formed in these compressed air duct pipes. In the fog-proof equipment of the automobile road in which compressed air is supplied from the blower to each of these compressed air duct pipes, the suction side of the blower is connected to the dehumidifier for removing the moisture contained in the outside air of the automobile road. Anti-fog equipment.