Buoyancy-based safety fence for underground roadways

Abstract

To provide a safety fence for an underground driveway using buoyancy.SOLUTION: A safety fence 100 installed between vertical columns H constructed along a road of an underground driveway with specific intervals therebetween, includes: at least one air pocket 10 arranged between a pair of adjacent vertical columns H to each other such that upper ends are sealed through abutment on a ceiling surface of the underground driveway and opened lower ends are exposed downward; moving bodies 20 in which both side edges are connected to guide grooves 25a provided on respective one side surfaces of the pair of vertical columns opposite to each other so as to be vertically reciprocal; and at least one buoyant body 30 generating buoyancy to float on a water surface upon water immersion in the underground driveway, wherein the buoyant body 30 moves upward corresponding to a water level of flowing rain water upon the water immersion in the underground driveway, the moving body 20 moves upward along the guide groove 25a together with the buoyant body 30 moving upward to be stopped through abutment of the upper end of the moving body 20 moving upward on the lower end of the air pocket 10 opened downward.SELECTED DRAWING: Figure 2

Description

[Technical Field]

[0001] The present invention relates to a safety fence for underground roadways, and more particularly to a safety fence for underground roadways that utilizes buoyancy to enable the position of the fence to be identified as it rises above the water surface in response to a sudden rise in water level when the underground roadway is flooded, and to enable drivers, passengers, and pedestrians who have escaped from a flooded vehicle to grab the floating buoyant body and request rescue or to evacuate from the underground roadway to a safe area outside. [Background technology]

[0002] Generally, underground roadways are constructed and operated at a lower level than ground level to avoid above-ground structures.

[0003] Because ordinary underground roadways are lower than ground level, there is a risk that rainwater will collect in the roadway when it rains, causing 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.

[0004] When the drainage pump installed in the underground carriageway breaks down or when heavy rainfall occurs that exceeds the discharge capacity of the drainage pump, the rainwater that has accumulated in the water collection tank flows back and rapidly flows into the underground carriageway, which is located below ground level, causing flooding of the underground carriageway. This is a major cause of property damage caused by flooded vehicles, as well as personal injury accidents involving drivers who are unable to escape from flooded vehicles.

[0005] Therefore, in order to prevent vehicles or pedestrians from entering underground roadways that are vulnerable to sudden flooding due to sudden heavy rain, a system was applied to the underground roadway system that measures the water level in the roadway with electrical sensors and blocks vehicle entry or issues an electrical warning before the roadway is flooded.

[0006] However, such warning and blocking systems can be rendered ineffective by electrical leakage, short circuits, or power outages caused by rainwater in situations such as heavy rain or typhoons. When the warning and system malfunctions, there is a fatal problem in that there is no way to notify vehicles or people outside the underground passage of the flooded condition or to block access.

[0007] Patent Document 1 (KR10-2423001 B1) discloses a device that warns 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 appears 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.

[0008] However, although 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, drivers of vehicles or pedestrians who entered the underground carriageway before the flooding could not escape to the ground level from the flooded underground carriageway, where the water level rose rapidly and made it difficult to move, posing a very high risk of fatal accidents. Summary of the Invention [Problem to be solved by the invention]

[0009] The present invention has been made to solve the above-mentioned problems, and the object of the present invention is to provide a safety fence for underground carriageways that uses buoyancy, in which when the water level of the underground carriageway rises due to a sudden influx of water into the carriageway, a buoyant body that is part of the fence structure is kept above the water surface in accordance with the water level, allowing the position of the fence to be confirmed, and allowing people to grab the moving body that rises together with the buoyant body or stand on it to request rescue or take refuge in an external safe area.

[0010] Another object of the present invention is to provide a safety fence for an underground roadway that uses buoyancy to ensure the upward movement of a buoyant body that collides with water flowing into the underground roadway when it is flooded, and to minimize frictional resistance caused by the buoyant body, thereby preventing damage to structural facilities.

[0011] The technical problems to be solved by the present invention are not limited to those mentioned above, and other technical problems not mentioned above will be clearly understood by those skilled in the art to which the present invention pertains from the following description. [Means for solving the problem]

[0012] According to one aspect of the present invention, there is provided a safety fence for an underground carriageway that uses buoyancy, the safety fence being installed between vertical pillars that are installed at regular intervals along the roadway of an underground carriageway, the safety fence including: at least one air pocket that is disposed between a pair of adjacent vertical pillars such that its upper end is sealed against the ceiling surface of the underground carriageway and its open lower end is 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 movable up and down; and at least one buoyant body that generates buoyancy to rise to the surface of water when the underground carriageway is flooded, the buoyant body moving upward in accordance with the water level of rainwater that flows into the underground carriageway when the underground carriageway is 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.

[0013] In this case, a connecting portion that connects the moving body and the buoyant body may be included, 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 inserted and connected.

[0014] 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.

[0015] 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.

[0016] In this case, the device may include an elastic body that is inserted and disposed on the outer surface of the rotation support shaft, and has an upper end fixed to the moving body and a lower end fixed to the buoyant body.

[0017] 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.

[0018] In this case, the buoyant body, the upper surface of which is in contact with the moving body, may include restraining guide bars on both sides thereof, which are inserted into the guide grooves to guide the moving body in the up and down direction along the vertical pillars.

[0019] 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.

[0020] At this time, the air pocket may include at least one transmitting member inside the air pocket, which transmits position information of the corresponding air pocket to the outside when operated.

[0021] At this time, at least one air supply line is buried in the upper region of the underground passageway to supply air, and a discharge end of the air supply line is connected to at least one supply hole formed through the air pocket or is positioned at a lower end opening of the air pocket. [Effects of the Invention]

[0022] With the above-mentioned configuration, the safety fence for underground carriageways that uses buoyancy 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 in accordance with the rising water level when the water level rises due to rainwater flowing into the underground carriageway, and the moving body that has risen to the water surface and the buoyant body can be seen with the naked eye, and the upper end of the moving body that is moving upward comes into contact with the upper end of the underground carriageway and stops, so that drivers and pedestrians who have escaped from their vehicles inside the underground carriageway that is beginning to flood can confirm the position of the moving body, which is the fence structure, with the naked eye and at the same time grab or step on the moving body that has risen to the water surface and move to the entrance / exit side of the underground carriageway to safely escape, thereby preventing personal injury accidents.

[0023] In addition, even if the water level in the underground carriageway rises to the ceiling, drivers and pedestrians who escape from the vehicles can breathe the air remaining inside the air pockets, thereby increasing their chances of survival even when the underground carriageway is completely flooded. The location of the air pockets can be transmitted to the outside, allowing the exact location of survivors to be confirmed and rescue efforts to be carried out quickly, while air can be supplied from the outside to the air pockets whose locations have been confirmed, increasing the chances of survivors survival until rescue.

[0024] In addition, when the 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 obstructing its flow. This minimizes the frictional resistance that occurs between the moving body that moves upward together with the buoyant body and the vertical pillar when the water level rises, thereby enabling the buoyant body and moving body to move upward stably and preventing deformation and damage to the facility.

[0025] The effects of the present invention are not limited to the effects described above, but include all effects that can be inferred from the configuration of the invention described in the detailed description of the present invention or the claims. [Brief explanation of the drawings]

[0026] FIG. 1 is a schematic diagram showing an installation state of a safety fence for underground roadways that utilizes buoyancy according to an embodiment of the present invention.

[0027] FIG. 2 is a perspective view of a buoyancy-utilizing safety fence for underground roadways according to an embodiment of the present invention.

[0028] FIG. 3 is an exploded perspective view of a safety fence for underground roadways that utilizes buoyancy according to an embodiment of the present invention.

[0029] FIG. 4 is an exploded perspective view showing a buoyancy body of a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0030] FIG. 5 is a perspective view showing a buoyancy-based underground roadway safety fence to which a rotary support shaft and an elastic body are applied according to an embodiment of the present invention.

[0031] FIG. 6 is an exploded perspective view of a buoyant body and a moving body to which a rotary support shaft and an elastic body are applied in a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0032] FIG. 7 is a detailed view of a connecting portion made up of a rotation support shaft and an elastic body, which is applied to a safety fence for an underground roadway using buoyancy according to an embodiment of the present invention.

[0033] 8(a) and 8(b) are diagrams showing the use of a buoyant body applied to an underground roadway safety fence using buoyancy according to an embodiment of the present invention.

[0034] 9(a) and 9(b) are diagrams showing the use of another buoyant body applied to an underground roadway safety fence using buoyancy according to an embodiment of the present invention.

[0035] 10(a), 10(b) and 10(c) are diagrams showing the operation of the underground roadway safety fence utilizing buoyancy according to the embodiment of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

[0036] 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 that are 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.

[0037] The words and terms used in this specification and claims are not to be construed as being limited to their ordinary or dictionary meanings, but are to 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 the terms and concepts in order to best explain his / her invention.

[0038] 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 invention.

[0039] In this specification, the terms "comprise" or "have" and the like are intended to describe the presence of any feature, number, step, operation, component, part, or combination 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.

[0040] When a component is referred to as being "in front of," "behind," "above," or "below" another component, it does not only mean that it is directly adjacent to the other component and is located "in front of," "behind," "above," or "below," unless there are special circumstances, but also includes the case where another component is located 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.

[0041] Hereinafter, a buoyancy-utilizing underground roadway safety fence 100 according to an embodiment of the present invention will be described with reference to the drawings.

[0042] As shown in Figures 1, 2, 3 and 4, the buoyancy-based safety fence 100 for underground carriageways according to an embodiment of the present invention is installed between vertical pillars H that are installed vertically between the bottom and ceiling of the underground carriageway at regular intervals along the road of the underground carriageway, and includes an air pocket 10, a moving body 20 and a buoyancy body 30 to provide safe evacuation for drivers who escape from their vehicles when the underground carriageway is flooded and to increase the survival rate even when the underground carriageway is completely flooded.

[0043] 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 is in contact with the ceiling surface of the underground passage and is sealed.

[0044] Such an air pocket 10 may include a substantially hexahedral box structure whose upper end corresponding to the ceiling surface of the underground roadway is sealed and whose lower end corresponding to the road surface of the underground roadway is open so as to be exposed downward.

[0045] 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 passage with a sealant as a whole, and whose open lower end is sealed.

[0046] In addition, the air pocket 10 is detachably attached by a plurality of fastening members, with one of its upper end, side end, and lower end contacting the ceiling surface of the underground passageway, one side of the vertical pillar H, or a bracket provided on a vertical guide frame 25 described later.

[0047] At this time, it is preferable that the width of the air pocket 10 is approximately the same as the width of the vertical pillar H so as not to interfere with vehicles traveling through the underground roadway.

[0048] In addition, the air pocket 10 may include at least one transmitting member 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.

[0049] At this time, it is preferable that the surface of the transmitting member 12 is coated with a fluorescent agent so that the position can be confirmed even in a dark environment, or that the transmitting member 12 is installed on the inner surface of the air pocket 10 coated with a fluorescent agent.

[0050] The air pocket 10 also includes at least one air supply line 16 buried in the upper region of the underground passageway, 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 passageway, and the discharge end of the air supply line 16 is connected to the supply hole 15 to supply air into the air pocket 10.

[0051] As a result, even if the inside of the underground carriageway is completely flooded by rainwater flowing into the inside of the underground carriageway, the internal space of the air pocket 10 is filled with air, and survivors inside the underground carriageway can breathe the air remaining in the air pocket 10.

[0052] By touching or pressing the transmitting element provided inside the air pocket 10, the location of the air pocket 10 as well as whether or not any survivors are alive can be transmitted to the outside, allowing the location of any survivors in the flooded underground passage to be confirmed from the outside.

[0053] By forcibly supplying air into the corresponding air pocket 10 through the supply hole 15 of the corresponding air pocket 10 in response to the transmission signal of the transmitting member 12, the survival rate of survivors can be further increased by the air supplied and filled into the air pocket 10.

[0054] 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 is not limited thereto. The discharge end of the air supply line 16 may be connected to a supply hole 15 formed through one of both sides of the air pocket 10, or may be located at the opening at the lower end of the air pocket 10 to supply air from the outside into the air pocket 10 to fill it.

[0055] Referring to Figures 1, 2 and 3, the moving body 20 is a fence structure having a substantially rectangular frame shape, the both side edges of which are 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.

[0056] The moving body 20 may include a pair of vertical members 23 connecting both ends of an upper horizontal member 21 and a lower horizontal member 22, which are made of square pipe material with an approximately square cross section, and a wire mesh body 24 provided in a lattice shape on the square frame made of the upper horizontal member 21, the lower horizontal member 22 and the pair of vertical members 23.

[0057] Both side edges of the moving body 20 are inserted into guide grooves 25a of vertical guide frames 25 provided on one side of each of a pair of opposing vertical pillars H, and are connected to each other so as to be movable up and down.

[0058] The guide grooves 25a may be formed in the form of molded grooves formed 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 by a certain length into one side of the vertical pillars H.

[0059] The vertical guide frame 25 is fixedly installed vertically on one side of a pair of opposing vertical pillars H by 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 movable body 20 are inserted and positioned so as to be able to move back and forth in the up and down direction.

[0060] At this time, 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.

[0061] The vertical guide frame 25 may include a steel section that is embedded inside the vertical column H when the vertical column H is formed, and exposes the guide groove 25a to one side of the vertical column H.

[0062] As a result, the movable body 20 can be guided and moved up and down by 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 side edges, into the guide grooves 25a.

[0063] 1, 2 and 3, the buoyant body 30 is at least one buoyant structure that generates buoyancy to rise to the surface of the water when the underground roadway is flooded.

[0064] Such a 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 moves 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.

[0065] The length of the buoyant body 30 is preferably shorter than the distance between the vertical pillars H so as not to interfere with the vertical guide frames 25 fixedly installed on one side of each of the adjacent vertical pillars H.

[0066] Referring to FIG. 4, the buoyancy body 30 includes 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.

[0067] Here, the buoyant body 30 has been illustrated and described as being made up of a box structure incorporating a plurality of containers 33 that generate buoyancy, but is not limited to this and may include a substantially hexahedral, sealed hollow buoyant structure that is molded with buoyancy, such as Styrofoam, that generates buoyancy, or that has an internal space of a certain size that is filled by injecting external air through an inlet.

[0068] 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.

[0069] The pair of connecting ribs 51 may be rib members integrally provided on the upper surface of the cover plate 32, or may be assembled rib members that are detachably assembled on the upper surface of the cover plate 32.

[0070] In addition, the buoyant body 30 may include restraint guide bars 35 inserted correspondingly into the guide grooves 25a so as to be guided and moved up and down along the vertical pillars H facing each other on both sides.

[0071] 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, the upper surface of the buoyant body 30, which moves upward in accordance with the rise in water level when the underground passage is flooded, 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.

[0072] 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 and allows the buoyant body 30 to rotate so as to minimize the resistance of the flow of water hitting the buoyant body 30.

[0073] The connecting part 50 includes 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 allow the buoyant body 30 to rotate and to which the lower end of the rotation support shaft 55 is rotatably connected, so that the buoyant body 30 can rotate and move by itself.

[0074] In this case, the rotation support shaft 55, which is the center of rotation of the buoyant body 30 floating on the water surface, may be provided at a position corresponding to the center of the length and center of the width of the buoyant body 30, but is not limited to this and may be provided at an eccentric position biased to one side from the center of the length of the buoyant body 30.

[0075] 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 running water.

[0076] In addition, when the rotation support shaft 55 is provided at an eccentric position of the buoyant body 30, the buoyant body 30 can rotate in a clockwise or counterclockwise direction around the rotation support shaft 55 along the flow of flowing water.

[0077] The lower end of the rotation support shaft 55 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 while maintaining a connection with the buoyant body 30 and floating to the water surface.

[0078] In addition, the connecting part 50 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 may include a coil-type elastic body 53 such as a torsion spring that generates an external force to return the rotationally moved buoyant body 30 to its original state by an elastic restoring force generated when the rotational movement of the buoyant body 30 is caused by flowing water.

[0079] In addition, the moving body 20 may include a stopper 54 extending to one end of the buoyant body 30 to contact the end of the buoyant body 30 and limit rotational movement so that the buoyant body 30 does not rotate more than 360° due to flowing water.

[0080] The stopper 54 may include a bent plate member extending a certain length from one end or both ends of the lower horizontal member 22 constituting the moving body 20 toward the end of the buoyant body 30 facing the end.

[0081] Such a stopper 54 is preferably provided within a radius of the rotation support shaft 55 as the center of rotation so as to interfere with the buoyant body 30 .

[0082] Meanwhile, the rotation support shaft 55 has been illustrated and described as being configured as an axial 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 the rotation support hole 52 formed through the upper surface of the buoyant body 30, but is not limited to this. The rotation support shaft 55 may also be configured as an axial member of a certain length whose upper end is rotatably connected to the 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.

[0083] As a result, when the water level of 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 connected integrally with the buoyant body 30 or whose upper surface and lower end 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 floating on the water surface.

[0084] At this time, the buoyant body 30 rotates in one direction around the rotation support shaft 55 according to the flow rate of the flowing water flowing into the underground passageway, and the buoyant body 30 that rises to the water surface due to the rotational movement of the buoyant body 30 does not obstruct the flow of the flowing 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.

[0085] In addition, when the water level of the underground carriageway rises close to the ceiling surface due to the inflow of rainwater, the upper end of the moving body 20 moving upward together with the buoyant body 30 comes into contact with the lower end of the air pocket 10 fixedly installed on the ceiling surface of the underground carriageway, and further upward movement is stopped.

[0086] 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 stands by.

[0087] In this state, when the underground roadway is flooded, the buoyant body 30 rises along the vertical column H together with the moving body in accordance with the gradually rising water level change, and at the same time, can rotate in one direction with the rotation support shaft 55 as the center of rotation due to the flow rate of the inflowing water.

[0088] When the independently arranged buoyant body 30 rotates and moves, it is possible to 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 from the guide grooves 25a in which both ends of the moving body 20 are placed. 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 the buoyant body 30, thereby preventing deformation or damage to the structure.

[0089] 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.

[0090] In this state, when the underground carriageway 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 water flowing, they can rotate in one direction with the rotation support shaft 55 as the center of rotation.

[0091] 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 from the guide grooves 25a in which both ends of the moving body 20 are placed. As a result, the upward movement of the moving body 20 due to the buoyancy of the buoyant bodies 30, 30a 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 directly or indirectly to the moving body 20 and the buoyant bodies 30, 30a, thereby preventing deformation or damage to the structure.

[0092] The operation of the underground roadway safety fence utilizing buoyancy according to the embodiment of the present invention will now be described.

[0093] Under normal circumstances, the buoyant body 30 descends under its own weight and waits together with the moving body 20 at the bottom of the underground roadway, as shown in FIG. 10(a).

[0094] In this situation, if rainwater caused by heavy summer rains rapidly flows 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.

[0095] 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 water surface height of the rising water level, as shown in Figure 10 (b).

[0096] In this case, the upper surface of the buoyant body 30 moving upward is integrally connected to the lower horizontal member 22, which is the lower end 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, which are both side edges of the moving body 20, are connected to the 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 together with the buoyant body 30 along the guide grooves 25a.

[0097] The buoyant body 30 connected to the moving body 20 via a connecting part 50 such as the rotation support shaft 55 can reduce the frictional resistance generated between the moving body 20, which moves upward while rotating around the rotation support shaft 55 according 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.

[0098] As the water level in the underground passageway gradually rises closer to the ceiling, the upper end of the moving 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 moving body 20 is interrupted.

[0099] 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, and can step on the buoyant body 30 with their feet to grab the mobile object 20 exposed above the water surface and move to the entrance / exit side 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.

[0100] In addition, when the underground roadway is completely flooded, the survival rate of the driver, passengers or pedestrians can be increased by breathing the air remaining inside the air pocket 10 that contacts the upper end of the moving body 20.

[0101] By operating the transmitting member 12 provided in 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 the survivors is transmitted to the outside, so that the exact location of the survivors in the flooded underground carriageway can be confirmed from the outside and rescue operations can be carried out.

[0102] In addition, air is supplied to the inside 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 of the transmitting member 12, thereby further increasing the survival rate of survivors who breathe the air supplied to the inside of the air pocket 10.

[0103] 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 (issue management specialist) organization] 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] Daeheung Unemployment [Research Period] 2023.04.01~2025.12.31 [Explanation of symbols]

[0104] 10. Air pockets 12 Transmitting element 15...supply hole 16 Air supply line 20 Mobile 21...Top 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 part 51 Connecting rib 52 Rotation support hole 53 Elastic body 54 Stopper 55 Rotation support shaft H...Vertical column

Claims

1. 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.

2. 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 to the connecting ribs.

3. 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.

4. a connecting portion that connects the moving body and the buoyant body, 2. The safety fence for underground carriageways 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.

5. 5. A safety fence for underground roadways utilizing buoyancy as described in claim 3 or claim 4, characterized in that it includes an elastic body that is inserted and arranged on the outer surface of the rotating support shaft, and has an upper end fixed to the moving body and a lower end fixed to the buoyant body.

6. The safety fence for underground roadways using buoyancy as described in claim 3 or claim 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.

7. 2. The safety fence for underground roadways using buoyancy according to claim 1, wherein the buoyant body, the upper surface of which is in contact with the moving body, includes restraining guide bars on both sides thereof which are inserted into the guide grooves correspondingly so as to be guided to move up and down along the vertical pillars.

8. 2. The safety fence for an underground carriageway using buoyancy according to claim 1, wherein the guide groove is a linear groove recessed to a certain depth on one side of the vertical pillar, or a linear groove formed in a vertical guide frame fixedly installed vertically on one side of the vertical pillar.

9. 2. The safety fence for underground roadways using buoyancy according to claim 1, further comprising at least one transmitting member inside the air pocket that transmits position information of the corresponding air pocket to an outside side when operated.

10. 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.

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