JP7779574B2 - Buoyancy-based safety fence for underground roadways - Google Patents

Description

The present invention relates to a safety fence for underground roadways, and more specifically to a buoyancy-based safety fence for underground roadways that rises above the water surface as the water level rises rapidly when the underground roadway is flooded, allowing the location of the exposed fence to be confirmed, and that allows drivers, passengers, and pedestrians escaping from a flooded vehicle to grab the floating buoyant object and request rescue or evacuate from the underground roadway to a safe area outside.

Underground roads are generally constructed and operated at a lower elevation than ground level to avoid above-ground structures.

Normal underground roadways are lower than ground level, so when it rains, rainwater can collect in the roadway and cause flooding. Therefore, a water collection tank is installed to collect and store rainwater, and a drainage pump is installed in the water collection tank to pump the rainwater outside and drain it away.

When the drainage pump installed in the underground carriageway breaks down or when heavy rainfall occurs that exceeds the pump's discharge capacity, the rainwater accumulated in the collection tank backs up and rapidly flows into the underground carriageway, which is located below ground level, causing flooding. This is a major cause of property damage caused by vehicles being submerged in water, as well as personal injury accidents involving drivers who are unable to escape from submerged vehicles.

As a result, to prevent vehicles or pedestrians from entering underground roadways, which are vulnerable to sudden flooding due to sudden heavy rain, the underground roadway system is operated using an electrical sensor to measure the water level in the roadway and either block vehicle entry or issue an electrical warning before the roadway is flooded.

However, these warning and cut-off systems can be rendered ineffective by electrical leakage, short circuits, or power outages caused by rainwater during heavy rain or typhoons. When the warning and system malfunctions, there is no way to notify vehicles or people outside the underground passage of the flooded condition or to block access, which poses a fatal problem.

Patent document 1 (KR10-2423001 B1) discloses a device for warning of flooding in an underground carriageway, in which a flood warning rod is configured to move from inside the penetration pipe toward the upper end when a buoy module floats when the underground carriageway is flooded, and the length of the tip of the upper end that emerges from the penetration pipe to the outside of the upper end of the underground carriageway varies depending on the degree to which the buoy module floats.

However, while such flood warning devices have the advantage of warning vehicles and pedestrians to prevent entry into a flooded underground carriageway even during a power outage, they pose a high risk of fatal accidents, as drivers and pedestrians who enter the underground carriageway before it floods are unable to escape to the surface due to the rapidly rising water level, making it difficult to move through the flooded carriageway.

The present invention is designed to solve the above-mentioned problems, and its object is to provide a safety fence for underground roadways that uses buoyancy. When the water level in the underground roadway rises due to a sudden influx of water into the roadway, the buoyant body that is part of the fence structure remains above the water surface in accordance with the water level, allowing people to confirm the position of the fence and to grab or stand on the moving body that rises with the buoyant body to request rescue or take refuge in an external safety area.

Another object of the present invention is to provide a safety fence for underground roadways that uses buoyancy to ensure the upward movement of a buoyant body that collides with inflowing water when an underground roadway is flooded, and minimize the frictional resistance caused by the buoyant body, thereby preventing damage to structural facilities.

The technical objectives to be achieved by the present invention are not limited to those mentioned above, and other technical objectives not mentioned should be clearly understood by those with ordinary skill in the art to which the present invention pertains from the description below.

According to one aspect of the present invention, a safety fence for an underground carriageway that uses buoyancy is provided, the safety fence being installed between vertical pillars installed at regular intervals along the roadway of an underground carriageway. The safety fence includes at least one air pocket disposed between a pair of adjacent vertical pillars with its upper end sealed against the ceiling surface of the underground carriageway and its open lower end exposed downward; a movable body whose both edges are connected to guide grooves formed on each side of the pair of opposing vertical pillars so as to be able to move up and down; and at least one buoyant body that generates buoyancy to rise to the surface of the water when the underground carriageway is flooded, the buoyant body moving upward in accordance with the water level of rainwater flowing into the underground carriageway when flooded, and the movable body moving upward along the guide groove together with the rising buoyant body, and the upper end of the moving body coming into contact with the lower end of the air pocket that is open downward and stopping.

In this case, a connecting portion may be included that connects the moving body and the buoyant body, and the connecting portion may include a pair of connecting ribs provided on the upper surface of the buoyant body so that the lower end of the moving body is fitted and connected.

In this case, a connecting part that connects the moving body and the buoyant body may be included, and the connecting part may include a rotation support shaft of a certain length whose upper end is connected to the lower end of the moving body, and a rotation support hole that is formed through the upper surface of the buoyant body and to which the lower end of the rotation support shaft is rotatably connected.

In this case, a connecting part that connects the moving body and the buoyant body may be included, and the connecting part may include a rotation support shaft of a certain length whose upper end is connected to the upper surface of the buoyant body, and a rotation support hole that is formed through the lower end of the moving body and to which the upper end of the rotation support shaft is rotatably connected.

In this case, the device may include an elastic body that is inserted into the outer surface of the rotary support shaft, has an upper end fixed to the moving body, and a lower end fixed to the buoyant body.

In this case, the moving body may include a stopper extending a certain length toward the end of the buoyant body so as to interfere with the end of the buoyant body and limit the rotational movement of the buoyant body.

In this case, the buoyant body whose upper surface is in contact with the moving body may include restraint guide bars on both sides that are inserted into the guide grooves to guide the moving body in the up and down direction along the vertical pillars.

In this case, the guide groove may be a linear groove recessed to a certain depth on one side of the vertical pillar, or may be a linear groove formed in a vertical guide frame fixedly installed perpendicularly to one side of the vertical pillar.

In this case, at least one transmitting element may be included inside the air pocket, which transmits position information of the corresponding air pocket to the outside when operated.

In this case, at least one air supply line is buried in the upper area of the underground passageway to supply air, and the discharge end of the air supply line is connected to at least one supply hole formed through the air pocket or is located at the lower end opening of the air pocket.

With the above-mentioned configuration, the buoyancy-based safety fence for underground roadways according to the present invention allows the moving body in contact with the buoyant body that has risen to the water surface to move upward together with the buoyant body as the water level rises due to rainwater flowing into the underground roadway. This allows the moving body and the buoyant body that have risen to the water surface to be seen with the naked eye, and the upper end of the moving body that is rising comes into contact with the upper end of the underground roadway and stops. This allows drivers and pedestrians who have escaped from their vehicles inside the underground roadway that is beginning to flood to visually confirm the position of the moving body, which is the fence structure, and at the same time, they can grab or step on the moving body that has risen to the water surface and move toward the entrance/exit of the underground roadway to safely escape, thereby preventing personal injury accidents.

In addition, even if the water level in the underground carriageway rises to the ceiling, drivers and pedestrians who escape from their vehicles can breathe the air remaining inside the air pockets, increasing their chances of survival even when the underground carriageway is completely flooded. By transmitting the location of the air pockets to the outside, the location of survivors can be accurately confirmed and rescue efforts can be carried out quickly. At the same time, air can be supplied from the outside to the air pockets whose location has been confirmed, increasing the chances of survivors surviving until rescue.

In addition, when an underground roadway is flooded, the buoyant body rotates and moves as it collides with the flowing water, allowing the flowing water to pass under the buoyant body without being obstructed. This minimizes the frictional resistance that occurs between the moving body and the vertical pillar, which moves upward with the buoyant body when the water level rises. This allows the buoyant body and moving body to move upward stably while preventing deformation and damage to the facility.

The effects of the present invention are not limited to those described above, but include all effects that can be inferred from the configuration of the invention described in the detailed description of the invention or the claims.

Figure 1 is a schematic diagram showing the installation state of an underground roadway safety fence that utilizes buoyancy according to an embodiment of the present invention.

Figure 2 is a perspective view of an underground roadway safety fence that utilizes buoyancy according to an embodiment of the present invention.

Figure 3 is an exploded perspective view of an underground roadway safety fence that utilizes buoyancy according to an embodiment of the present invention.

Figure 4 is an exploded perspective view showing a buoyancy body of an underground roadway safety fence that uses buoyancy according to an embodiment of the present invention.

Figure 5 is a perspective view of an underground roadway safety fence using buoyancy according to an embodiment of the present invention, to which a rotating support shaft and elastic body are applied.

Figure 6 is an exploded perspective view of a moving body and a buoyant body to which a rotating support shaft and an elastic body are applied in a safety fence for underground roadways that uses buoyancy according to an embodiment of the present invention.

Figure 7 is a detailed view of a connecting portion consisting of a rotating support shaft and an elastic body applied to a safety fence for underground roadways that uses buoyancy in accordance with an embodiment of the present invention.

Figures 8(a) and 8(b) are diagrams showing the use of a buoyant body applied to an underground roadway safety fence that utilizes buoyancy according to an embodiment of the present invention.

Figures 9(a) and 9(b) are diagrams showing the use of another buoyant body applied to an underground roadway safety fence that utilizes buoyancy according to an embodiment of the present invention.

Figures 10(a), 10(b), and 10(c) are diagrams showing the operating state of an underground roadway safety fence that utilizes buoyancy according to an embodiment of the present invention.

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings so that those skilled in the art can easily carry out the present invention.
As those skilled in the art would realize, the described embodiments may be modified in various different ways, all without departing from the spirit or scope of the present invention.
In order to clearly explain the present invention, parts not relevant to the description will be omitted from the drawings, and the same reference numerals will be used throughout the specification to refer to the same or similar components.

The words and terms used in this specification and claims should not be construed as being limited to their ordinary or dictionary meanings, but should be construed as meanings and concepts that correspond to the technical idea of the present invention, based on the principle that the inventor can define terms and concepts in order to best explain his or her invention.

Therefore, the embodiments described in this specification and the configurations shown in the drawings correspond to one embodiment of the present invention and do not fully represent the technical ideas of the present invention, and therefore there may be various equivalents and modifications that can replace the relevant configurations at the time of filing of the present application.

In this specification, the terms "comprise" or "have" are intended to describe the presence of features, numbers, steps, operations, components, parts, or combinations thereof described in the specification, but do not preclude the possibility of the presence or addition of one or more other features, numbers, steps, operations, components, parts, or combinations thereof.

When a component is referred to as being "in front of,""behind,""above," or "below" another component, it does not only mean that the component is directly adjacent to the other component and is positioned "in front of,""behind,""above," or "below," unless there are special circumstances, but also includes the case where another component is positioned between them.
Furthermore, when a component is "connected" to another component, it does not only mean that they are directly connected to each other, but also includes cases where they are indirectly connected to each other, unless there are special circumstances.

Below, a buoyancy-based underground roadway safety fence 100 according to an embodiment of the present invention will be described with reference to the drawings.

As shown in Figures 1, 2, 3, and 4, the buoyancy-based safety fence 100 for underground roadways according to an embodiment of the present invention is installed between vertical pillars H erected vertically between the bottom and ceiling of the underground roadway at regular intervals along the roadway, and can include an air pocket 10, a moving body 20, and a buoyant body 30 to provide a safe evacuation area for drivers who escape from their vehicles when the underground roadway is flooded, and to increase the survival rate even when the underground roadway is completely flooded.

Referring to Figures 1, 2, and 3, the air pocket 10 is a box structure fixedly installed between a pair of adjacent vertical pillars H so that its upper end contacts the ceiling surface of the underground passageway and is sealed.

Such an air pocket 10 may include a roughly hexahedral box structure whose upper end, which corresponds to the ceiling surface of the underground roadway, is sealed and whose lower end, which corresponds to the road surface of the underground roadway, is open and exposed downward.

In this case, the air pocket 10 may include a hexahedral box structure whose open upper edge is sealed by contacting the ceiling surface of the underground passageway with a sealant, and whose lower end is open.

The air pocket 10 is detachably attached by a plurality of fastening members, with one of its upper, side, and lower ends contacting the ceiling surface of the underground passageway, one side of the vertical pillar H, or a bracket attached to the vertical guide frame 25 (described later).

In this case, it is preferable that the width of the air pocket 10 be approximately the same size as the width of the vertical pillar H so as not to interfere with vehicles traveling through the underground roadway.

The air pocket 10 may also include at least one transmitter 12 inside, which transmits location information of the air pocket 10 installed in the underground passage to the outside when pressed or touched by a survivor.

In this case, it is preferable that the surface of the transmitting element 12 be coated with a fluorescent agent so that its position can be confirmed even in a dark environment, or that it be installed on the inner surface of the air pocket 10 coated with a fluorescent agent.

It also includes at least one air supply line 16 buried in the upper region of the underground carriageway, and at least one supply hole 15 formed through the outer surface of the air pocket 10 or the sealing surface of the air pocket 10 corresponding to the ceiling surface of the underground carriageway, and the discharge end of the air supply line 16 is connected to the supply hole 15 to supply air into the interior of the air pocket 10.

As a result, even if the interior of the underground carriageway is completely flooded by rainwater flowing into it, the internal space of the air pocket 10 will be filled with air, and survivors inside the underground carriageway will be able to breathe the air remaining in the air pocket 10.

By touching or pressing the transmitter inside the air pocket 10, the location of the air pocket 10, along with the presence or absence of survivors, can be transmitted to the outside, allowing the location of survivors in the flooded underground passage to be confirmed from outside.

By sending a signal from the transmitter 12, air is forcibly supplied into the corresponding air pocket 10 through the supply hole 15 of the corresponding air pocket 10, thereby supplying and filling the air inside the air pocket 10 and further increasing the survival rate of survivors.

Here, the discharge end of the air supply line 16 is illustrated and described as being connected to a supply hole 15 formed through the ceiling surface of the air pocket 10 to supply air when a button is operated or in an emergency, but this is not limited to this. The discharge end of the air supply line 16 can be connected to a supply hole 15 formed through one of the two sides of the air pocket 10, or can be located at the lower opening of the air pocket 10 to supply air from the outside to fill the inside of the air pocket 10.

Referring to Figures 1, 2, and 3, the moving body 20 is a fence structure having a generally rectangular frame shape, with both side edges connected to guide grooves 25a provided on each side of a pair of opposing vertical pillars H so as to be able to move back and forth up and down.

Such a moving body 20 may include an upper horizontal member 21 and a lower horizontal member 22, each made of a rectangular pipe with a substantially rectangular cross section, and a pair of vertical members 23 connecting the two ends of these members. The moving body 20 may also include a wire mesh 24 provided in a lattice shape on the rectangular frame made up of the upper horizontal member 21, the lower horizontal member 22, and the pair of vertical members 23.

The two side edges of the moving body 20 are inserted into guide grooves 25a of vertical guide frames 25 provided on each side of a pair of opposing vertical pillars H, allowing for vertical movement.

The guide grooves 25a may be formed in the form of molded grooves in the vertical guide frames 25 fixed to one side of each of a pair of opposing vertical pillars H by a plurality of fastening members, or may be formed in the form of grooves recessed to a certain length into one side of the vertical pillars H.

The vertical guide frame 25 is fixed vertically to one side of a pair of opposing vertical pillars H using a plurality of anchor members, and may include a steel member having an approximately U-shaped cross section to form guide grooves 25a into which vertical members 23 corresponding to both side edges of the moving body 20 are inserted so as to be able to move back and forth in the vertical direction.

In this case, the vertical guide frame 25 is made of a shaped steel member having a certain length so that its lower end is close to the bottom surface of the underground carriageway and its upper end is close to the open lower end of the air pocket 10.

The vertical guide frame 25 may include a steel section that is embedded inside the vertical pillar H when the vertical pillar H is formed, exposing the guide groove 25a to one side of the vertical pillar H.

As a result, the movable body 20 can be guided and moved up and down in response to an external force along the guide grooves 25a, which are exposed or formed on one side of a pair of opposing vertical pillars H, by inserting and connecting the vertical members 23, which are both edges of the movable body 20, into the guide grooves 25a.

Referring to Figures 1, 2, and 3, the buoyancy body 30 is at least one buoyancy structure that generates buoyancy to rise to the water surface when the underground roadway is flooded.

The buoyant body 30 is connected to the lower end of the moving body 20 via a connecting part 50 so that the upper part corresponding to the moving body 20 can move up and down along the vertical column H together with the moving body 20, or the upper surface corresponding to the moving body 20 is constrained by contacting the lower end of the moving body 20.

The length of the buoyant body 30 is preferably shorter than the distance between the vertical pillars H so as to avoid interference with the vertical guide frames 25 fixedly installed on each side of adjacent vertical pillars H.

Referring to FIG. 4, the buoyancy body 30 may include a buoyancy box body 31 having an internal space of a certain size in which a plurality of containers 33 that are filled with air to generate buoyancy are housed, and a cover plate 32 that covers and seals the open top of the buoyancy box body 31.

Here, the buoyant body 30 has been illustrated and described as being a box structure containing a plurality of containers 33 that generate buoyancy, but is not limited to this and may include a sealed hollow buoyant structure that is molded with buoyancy, such as Styrofoam, or an approximately hexahedral shape with a certain size internal space that is filled by injecting external air through an inlet.

Meanwhile, referring to Figures 2, 3, and 4, the connecting portion 50 may include a pair of connecting ribs 51 connected by a plurality of fastening members so that the lower horizontal member 22, which is the lower edge of the moving body 20, is fitted and disposed on the upper surface of the buoyant body 30 and is integrally connected to the lower end of the moving body 20.

The pair of connecting ribs 51 may be rib members integrally formed on the upper surface of the cover plate 32, or may be assembled rib members that are removably assembled to the upper surface of the cover plate 32.

The buoyant body 30 may also include restraint guide bars 35 that are inserted into the guide grooves 25a to guide movement in the up and down direction along the opposing vertical columns H on both sides.

In this case, the restraining guide bars 35 provided on both sides of the buoyant body 30 are restrained and connected to the guide grooves 25a so that they can move back and forth up and down. Therefore, when the underground roadway is flooded, the upper surface of the buoyant body 30, which moves upward in accordance with the rising water level, can transmit an external force that moves the moving body 20 upward along the guide grooves 25a while contacting the lower edge of the moving body 20 without the need for a connecting part 50 such as the connecting rib 51.

Referring to Figures 5, 6, and 7, the connecting portion 50 may include a structure that connects the moving body 20 and the buoyant body 30 to each other while allowing the buoyant body 30 itself to rotate so as to minimize the resistance of the flow of water hitting the buoyant body 30.

The connecting part 50 may include a rotation support shaft 55 of a certain length, the upper end of which is integrally connected to the lower surface of the moving body 20, and a rotation support hole 52 formed through the upper surface of the buoyant body 30 to which the lower end of the rotation support shaft 55 is rotatably connected, so that the buoyant body 30 can rotate independently.

In this case, the rotation support shaft 55, which is the center of rotation of the buoyant body 30 that has risen to the water surface, may be located at a position corresponding to the center of the length and width of the buoyant body 30, but is not limited to this and may be located at an eccentric position offset to one side from the center of the length of the buoyant body 30.

When the rotation support shaft 55 is provided at the center of the length of the buoyant body 30, the buoyant body 30 can freely rotate clockwise or counterclockwise around the rotation support shaft 55 along the flow of flowing water.

Furthermore, when the rotation support shaft 55 is provided at an eccentric position on the buoyant body 30, the buoyant body 30 can rotate in either a clockwise or counterclockwise direction around the rotation support shaft 55 along the flow of running water.

The lower end of the rotation support shaft 55, which is exposed to the outside through the rotation support hole 52 formed through the buoyant body 30, may include a restraining member such as a nut member 55a or a locking pin to allow the buoyant body 30 to rotate on its own around the rotation support shaft 55 as the center of rotation while maintaining its connection with the buoyant body 30.

The connecting part 50 may include a coil-shaped elastic body 53, such as a torsion spring, that is inserted into the outer surface of the rotation support shaft 55, has its upper end fixed to the lower end of the moving body 20, and its lower end fixed to the upper surface of the buoyant body 30, and generates an external force that returns the rotationally moved buoyant body 30 to its original state by the elastic restoring force generated when the buoyant body 30 rotates due to flowing water.

The moving body 20 may also include a stopper 54 extending to one end of the buoyant body 30 to contact the end of the buoyant body 30 and limit its rotational movement so that the buoyant body 30 does not rotate more than 360° due to flowing water.

The stopper 54 may include a bent plate member that extends a certain length from one end or both ends of the lower horizontal member 22 that constitutes the moving body 20 toward the end of the opposing buoyant body 30.

It is preferable that such a stopper 54 be provided within a radius of the rotation center of the rotation support shaft 55 so as to interfere with the buoyant body 30.

Meanwhile, the rotation support shaft 55 has been illustrated and described as being configured as a shaft member whose upper end is integrally connected to the lower horizontal member 22 at the lower end of the moving body 20 and whose lower end is connected to a rotation support hole 52 formed through the upper surface of the buoyant body 30. However, this is not limited to this, and the rotation support shaft 55 may also be configured as a shaft member of a certain length whose upper end is rotatably connected to a rotation support hole 52 formed through the lower horizontal member 22 at the lower end of the moving body 20 and whose lower end is integrally connected to the upper surface of the buoyant body 30.

As a result, when the water level in the underground carriageway rises due to rainwater flowing into the interior of the underground carriageway, the buoyant body 30 moves upward in accordance with the rising water level, and the moving body 20, which is integrally connected to the buoyant body 30 or whose upper and lower ends are in contact with the buoyant body 30, moves upward along the guide groove 25a of the vertical pillar H together with the buoyant body 30 due to the buoyancy of the buoyant body 30 that has risen to the water surface.

At this time, the buoyant body 30 rotates in one direction around the rotation support shaft 55 due to the flow rate of the water flowing into the underground passageway. The buoyant body 30, which rises to the water surface due to its rotation, does not obstruct the flow of the water, thereby minimizing the frictional resistance generated by the connecting parts between both ends of the moving body 20 and the guide groove 25a of the vertical pillar H.

In addition, when the water level in the underground carriageway rises close to the ceiling due to the inflow of rainwater, the upper end of the moving body 20, which moves upward together with the buoyant body 30, comes into contact with the lower end of the air pocket 10, which is fixedly installed on the ceiling surface of the underground carriageway, and further upward movement is interrupted.

Referring to Figures 8(a) and 8(b), when one buoyant body 30 is provided below the moving body 20 and one connecting part 50 having a rotation support shaft 55 is formed between the moving body 20 and the buoyant body 30, the buoyant body 30 is normally positioned alongside the moving body 20 directly below the moving body 20 and is on standby.

In this state, when the underground roadway becomes flooded, the buoyant body 30 rises along the vertical column H together with the moving body in response to the gradually rising water level, and at the same time, it can rotate in one direction around the rotation support shaft 55 due to the flow rate of the inflowing water.

When the independently positioned buoyant body 30 rotates, it can minimize the impact force of the flowing water transmitted to the buoyant body 30 without interfering with the flow of water flowing in one direction, thereby minimizing the frictional resistance generated by the guide grooves 25a in which both ends of the moving body 20 are positioned. As a result, the upward movement of the moving body 20 due to the buoyancy of the buoyant body 30 can be performed stably and without delay along the vertical pillar H in accordance with changes in water level, while reducing the external force due to the flowing water transmitted to the moving body 20 and buoyant body 30, preventing deformation or damage to the structure.

Referring to Figures 9(a) and 9(b), when a pair of buoyant bodies 30, 30a are provided below the moving body 20, and a pair of connecting parts 50, 50a having a rotation support shaft 55 are formed between the moving body 20 and the pair of buoyant bodies 30, 30a, the pair of buoyant bodies 30, 30a are normally positioned alongside the moving body 20 directly below the moving body 20 and are on standby.

In this state, when the underground roadway is flooded, the pair of buoyant bodies 30, 30a rise along the vertical column H together with the moving body 20 in accordance with the gradual vertical change, and at the same time, due to the flow rate of the flowing water, they can rotate in one direction around the rotation support shaft 55 as the center of rotation.

When the pair of buoyant bodies 30, 30a rotates, it is possible to reduce the impact force of the flowing water transmitted to the buoyant bodies 30, 30a without interfering with the flow of water flowing in one direction, thereby minimizing the frictional resistance generated by the guide grooves 25a in which both ends of the moving body 20 are positioned. As a result, the upward movement of the moving body 20 due to the buoyancy of the buoyant bodies 30, 30a can be carried out stably and without delay along the vertical pillar H in accordance with changes in water level, while reducing the external force due to the flowing water transmitted directly or indirectly to the moving body 20 and buoyant bodies 30, 30a, thereby preventing deformation or damage to the structure.

This section explains the operation of an underground roadway safety fence that utilizes buoyancy in accordance with an embodiment of the present invention.

Under normal conditions, the buoyant body 30 descends under its own weight and waits at the bottom of the underground roadway together with the moving body 20, as shown in Figure 10(a).

In this situation, if heavy summer rains cause rainwater to rapidly flow into the underground passageway, which is located below ground level, and the amount of water flowing in exceeds the amount of water discharged from the underground passageway for drainage treatment, the water level that flows into and accumulates inside the underground passageway will gradually rise and can quickly reach a dangerous level.

Furthermore, as the water level in the underground passageway gradually rises, the buoyant body 30 waiting at the bottom will gradually rise in accordance with the rising water surface, as shown in Figure 10 (b).

In this case, the upper surface of the buoyant body 30 moving upward is integrally connected to the lower horizontal member 22 at the bottom of the moving body 20 via a connecting part 50 such as a connecting rib 51 or a rotation support shaft 55, and the vertical members 23 at both sides of the moving body 20 are connected to guide grooves 25a provided in the vertical pillar H so that they can move up and down. Therefore, the buoyancy of the buoyant body 30 causes the moving body 20 to move directly upward along the guide grooves 25a.

The buoyant body 30, which is connected to the moving body 20 via a connecting part 50 such as the rotary support shaft 55, can reduce the frictional resistance generated between the moving body 20, which moves upward while rotating around the rotary support shaft 55 due to the flow rate of the inflowing water, and the guide groove 25a, and the reduced frictional resistance can ensure stable upward movement of the moving body 20.

As the water level in the underground passageway continues to rise gradually, approaching the ceiling surface, the upper end of the mobile body 20, which is moving upward together with the buoyant body 30, comes into contact with the lower end of the air pocket 10, as shown in Figure 10(c), and the upward movement of the buoyant body 30 and the mobile body 20 is interrupted.

In addition, drivers, passengers, or pedestrians who escape from vehicles such as cars or buses that have been suspended due to flooding of the underground roadway can see the mobile object 20 exposed above the water surface with their naked eyes, step on the buoyancy body 30 with their feet, grab the mobile object 20 exposed above the water surface, and move toward the entrance/exit of the underground roadway to safely take refuge in a safe area, thereby preventing personal injury accidents to drivers caused by flooding of the underground roadway.

Furthermore, in the event of complete flooding of the underground carriageway, drivers, passengers, or pedestrians can increase their chances of survival by breathing the remaining air that fills the air pocket 10 that contacts the upper end of the moving body 20.

By operating the transmitter 12 attached to the air pocket 10, the location of the corresponding air pocket 10 among the many air pockets installed in the underground carriageway, as well as the presence or absence of survivors, can be transmitted to the outside, allowing the exact location of survivors in the flooded underground carriageway to be confirmed from the outside and rescue operations to be carried out.

In addition, air is supplied to the interior of the air pocket 10 through the air supply line 16 connected to the supply hole 15 of the corresponding air pocket 10 based on the transmission signal from the transmitting member 12, thereby further increasing the survival rate of survivors who breathe the air supplied to the interior of the air pocket 10.

Although one embodiment of the present invention has been described, the concept of the present invention is not limited to the embodiment presented in this specification, and a person skilled in the art who understands the concept of the present invention may easily propose other embodiments by adding, changing, deleting, or adding components within the scope of the same concept, which also fall within the scope of the concept of the present invention.
[National research and development project that supported this invention]
[Project unique number]1315002037
[Project number] 00255650
[Ministry name] Ministry of the Interior and Safety
[Name of organization (specializing in issue management)] Korea Institute for Industrial Technology Evaluation and Management
[Research Project Name] National Needs Customized Life Safety Research and Development Project (Phase 2) (R&D)
[Research Project Name] Development and Demonstration of a Smart Urban Flood Safety Monitoring System Using a New Resource-Utilizing Multi-Cell Buoy
[Contribution rate] 1/1
[Task implementation agency name] Daiko Unemployment
[Research period] April 1, 2023 - December 31, 2025

DESCRIPTION OF SYMBOLS 10 Air pocket 12 Transmission member 15 Supply hole 16 Air supply line 20 Moving body 21 Upper horizontal member 22 Lower horizontal member 25 Vertical guide frame 25a Guide groove 30, 30a Buoyancy body 31 Buoyancy box body 32 Cover plate 35 Restraint guide bar 50, 50a Connection portion 51 Connection rib 52 Rotation support hole 53 Elastic body 54 Stopper 55 Rotation support axis H Vertical column

Claims (10)

A safety fence installed between vertical posts constructed at regular intervals along the road of an underground roadway.
At least one air pocket is disposed between a pair of adjacent vertical pillars such that an upper end thereof is in contact with a ceiling surface of the underground passageway and is sealed, and an open lower end thereof is exposed downward;
a moving body having both side frames connected to guide grooves formed on one side of each of a pair of opposing vertical columns so as to be able to move up and down;
and at least one buoyant body that generates buoyancy to rise to the water surface when the underground roadway is flooded;
The buoyant body moves upward in accordance with the water level of rainwater flowing into the underground carriageway when the underground carriageway is flooded, and the moving body moves upward along the guide groove together with the upwardly moving buoyant body, and the upper end of the moving body moving upward comes into contact with the lower end of an air pocket open at the bottom and stops. a connecting portion that connects the moving body and the buoyant body,
2. The safety fence for an underground roadway according to claim 1, wherein the connecting portion includes a pair of connecting ribs provided on an upper surface of the buoyant body so that the lower end of the moving body is fitted and connected. a connecting portion that connects the moving body and the buoyant body,
2. The safety fence for an underground roadway using buoyancy according to claim 1, wherein the connecting portion includes a rotation support shaft of a certain length, the upper end of which is connected to the lower end of the moving body, and a rotation support hole formed through an upper surface of the buoyant body and to which the lower end of the rotation support shaft is rotatably connected. a connecting portion that connects the moving body and the buoyant body,
2. The safety fence for an underground roadway using buoyancy according to claim 1, wherein the connecting portion includes a rotation support shaft of a certain length, the upper end of which is connected to the upper surface of the buoyant body, and a rotation support hole formed through the lower end of the moving body and to which the upper end of the rotation support shaft is rotatably connected. The buoyancy-utilizing safety fence for underground roadways described in claim 3 or 4, characterized in that it includes an elastic body that is inserted into the outer surface of the rotary support shaft, has its upper end fixed to the moving body, and its lower end fixed to the buoyant body. The buoyancy-based safety fence for underground roadways described in claim 3 or 4, characterized in that the moving body includes a stopper extending a certain length toward the end of the buoyant body so as to interfere with the end of the buoyant body and limit the rotational movement of the buoyant body. The buoyancy-based safety fence for underground roadways described in claim 1, characterized in that the buoyant body, whose upper surface is in contact with the moving body, includes restraint guide bars on both sides that are inserted into the guide grooves to guide movement in the up and down direction along the vertical pillars. The buoyancy-utilizing safety fence for underground roadways described in claim 1, characterized in that the guide groove is a linear groove recessed to a certain depth into one side of the vertical pillar, or a linear groove formed in a vertical guide frame fixedly installed vertically to one side of the vertical pillar. The buoyancy-based safety fence for underground roadways described in claim 1, characterized in that it includes at least one transmitting element inside the air pocket that transmits position information of the corresponding air pocket to the outside when operated. At least one air supply line is buried in the upper region of the underground roadway to supply air;
2. The safety fence for an underground roadway using buoyancy according to claim 1, wherein a discharge end of the air supply line is connected to and communicates with at least one supply hole formed through the air pocket or is located at a lower end opening of the air pocket.