Patent Number: 
Section: claims

1. A system for preventing and monitoring a leakage of water from a tank liner at a storage tank, the system comprising:a concrete reservoir;the tank liner made up of a wall liner that is formed by coupling a plurality of first panels and is attached to an inner wall of the concrete reservoir, and a floor liner that is formed by coupling a plurality of second panels, is attached to a floor of the concrete reservoir, and is coupled to the wall liner by welding;a leaking water collecting plate formed by welding a plurality of third panels and inserted between the floor liner and the floor of the concrete reservoir; andan edge leaking water collecting channel buried in an edge of the storage tank and configured to collect leaking water discharged between the floor liner and the leaking water collecting plate. 2. The system according to claim 1, further comprising a wall leaking water collecting channel that is buried in a wall of the concrete reservoir on an outer surface of the wall liner, is formed along a weld zone between the first panels at a long length, and is coupled to the edge leaking water collecting channel at a lower portion thereof. 3. The system according to claim 2, further comprising an air injection unit made up of a pneumatic device configured to inject compressed air into the edge leaking water collecting channel or the wall leaking water collecting channel and a pressure gauge configured to measure an internal pressure of the edge leaking water collecting channel or the wall leaking water collecting channel. 4. The system according to claim 1, further comprising a coupler that is buried in the floor of the concrete reservoir floor at a lower portion thereof, protrudes to correspond to a thickness of the third panel at an upper portion thereof, is formed as long as a length of the third panel, and is coupled with the third panels by welding the third panels at opposite upper sides thereof. 5. The system according to claim 4, wherein a weld zone between the second panels is disposed above the coupler in a length direction of the coupler, and the coupler serves as a floor leaking water collecting channel with a cross-section that is formed as a channel whose upper portion is open. 6. The system according to claim 4, wherein a weld zone between the second panels is disposed above the coupler in a length direction of the coupler, and the coupler serves as a floor coupling block as an inside thereof is formed in a solid block form. 7. The system according to claim 1, further comprising a heavy structure support that is buried in the floor of the concrete reservoir at a lower portion thereof, protrudes to correspond to a length adding up thicknesses of the second and third panels at an upper portion thereof, passes through the second and third panels to expose an upper surface thereof to the floor of the storage tank, and is welded to the second and third panels at an upper edge thereof. 8. The system according to claim 1, further comprising a through part that has a cylindrical sleeve formed by extending up to a lower portion of the concrete reservoir and is welded to the second and third panels at an upper edge thereof, the cylindrical sleeve being buried in the floor of the concrete reservoir at a lower portion thereof, protruding to correspond to a length adding up thicknesses of the second and third panels at an upper portion thereof, passing through the second and third panels to expose an upper surface thereof to the floor of the storage tank, being provided with a hollow channel vertically passing through the center thereof, and having an upper portion of the hollow channel communicating with an inside of the storage tank. 9. A method for preventing and monitoring a leakage of water from a tank liner at a storage tank,the storage tank including:a concrete reservoir;the tank liner made up of a wall liner that is formed by coupling a plurality of first panels and is attached to an inner wall of the concrete reservoir, and a floor liner that is formed by coupling a plurality of second panels, is attached to a floor of the concrete reservoir, and is coupled to the wall liner by welding;a leaking water collecting plate formed by welding a plurality of third panels and inserted between the floor liner and the floor of the concrete reservoir; andan edge leaking water collecting channel buried in an edge of the storage tank and configured to collect leaking water discharged between the floor liner and the leaking water collecting plate,the method comprising installing the third panels for collecting leaking water between a bottom of the floor liner and the floor of the concrete reservoir, causing the leaking water generated from the floor liner to flow to a gap between the floor liner and the leaking water collecting plate, and collecting the leaking water at the edge leaking water collecting channel. 10. The method according to claim 9, the storage tank further including a wall leaking water collecting channel that is buried in a wall of the concrete reservoir on an outer surface of the wall liner,the method further comprising, before the collecting of the leaking water, connecting a pneumatic device to the edge leaking water collecting channel or the wall leaking water collecting channel, injecting a predetermined amount of air into a leaking water passage formed by connecting the edge leaking water collecting channel, the wall leaking water collecting channel, and the gap between the floor liner and the leaking water collecting plate, and observing a change in pressure of the air inside the leaking water passage to detect whether or not the leakage of water occurs. 11. The method according to claim 10, further comprising, between the collecting of the leaking water and the detecting of whether or not the leakage of water occurs, if air bubbles are formed in the storage tank by injecting the air into the leaking water passage using the pneumatic device when generation of the leakage of water is detected by the change in pressure of the air inside the leaking water passage, specifying a point to which the air bubbles are discharged to ascertain a leak.