MULTIPLEX WATER CUTOFF WALL

Abstract

Provided is a multiplex water cutoff wall with a simple structure that can control water infiltration into an interior by way of being provided with multiple water cutoff walls and having a configuration to drain water having infiltrated between the water cutoff walls with a drainage means such as a pump. A plurality of water cutoff walls 1A, 1B, 1C, 1D are disposed in a multiplex configuration with gaps in the wall thickness direction. Drain pumps 4a, 4b, 4c are provided as the drainage means for discharging water having infiltrated between the water cutoff walls 1A, 1B, 1C, 1D to the outside. Water that has infiltrated between the water cutoff walls 1A and 1B when a rise in water level is caused outside the multiplex water cutoff wall during flooding is discharged to the outside of the multiplex water cutoff wall by the drain pump 4a. If necessary, the water cutoff wall can be arranged into a multiplex configuration with a third water cutoff wall 1C and a fourth water cutoff wall 1D, and water infiltrating therebetween is discharged with the drain pumps 4b, 4c. Thus, the level of infiltrating water is lower nearer the interior, and water flood damage can be prevented to a structure in the interior protected by the multiplex water cutoff wall.

Claims

1. A multiplex water cutoff wall comprising a plurality of water cutoff walls disposed at least doubly with gaps in the wall thickness direction, and a drainage means for discharging water having infiltrated between said water cutoff walls to the outside.

2. The multiplex water cutoff wall according to claim 1, wherein said water cutoff walls are formed of metal panels, plastic panels or cement-based panels.

3. The multiplex water cutoff wall according to claim 2, wherein said multiplex water cutoff wall is based on a configuration which is provided with supports disposed with a gap in the wall surface direction and each having at least two vertical guide grooves formed with gaps in the wall thickness direction and a plurality of water cutoff panels vertically disposed in a shape in which both ends thereof are fitted into said guide grooves.

4. The multiplex water cutoff wall according to claim 3, wherein a water cutoff material is interposed between said guide groove and said water cutoff panel and between the upper and lower water cutoff panels.

5. The multiplex water cutoff wall according to claim 2, wherein the water cutoff panel forming said water cutoff wall is openable and closable in the horizontal or vertical direction along a guide member.

6. The multiplex water cutoff wall according to claim 1, wherein said drainage means includes a drain pump.

7. The multiplex water cutoff wall according to claim 1, wherein said multiplex water cutoff wall is a water cutoff wall installed in the entrance of a structure, the periphery of the structure or an opening of a flood barrier constructed around the structure.

8. A flood-resistant building equipped with a flood barrier characterized in that a flood barrier made to be watertight is constructed around a building in a spacing relationship thereto so as to be in a shape which encloses nearly the entire periphery of the building except an opening serving as an entrance/exit during normal times, said flood barrier being configured in a type of wall made to be at least as tall as an inundation depth estimated to occur, as well as to have durability capable of resisting the water pressure at least as equal as that at the estimated inundation depth, and the multiplex water cutoff wall according to claim 1 is provided in said opening, as an opening sealing means for sealing the opening during inundation.

Description

BRIEF DESCRIPTION OF THE DRAWINGS

[0036] FIG. 1 is a view showing a multiplex water cutoff wall of the present invention in principle.

[0037] FIG. 2 is a horizontal sectional view showing one embodiment of the multiplex water cutoff wall of the present invention.

[0038] FIG. 3 is a vertical sectional view correspondingly showing the embodiment shown in FIG. 2.

[0039] FIG. 4 is a horizontal sectional view showing another embodiment of the multiplex water cutoff wall of the present invention.

[0040] FIG. 5 is a vertical sectional view correspondingly showing the embodiment shown in FIG. 4.

[0041] FIG. 6 is a view schematically showing a flood barrier in cases where the multiplex water cutoff wall of the present invention is applied to the flood barrier constructed around the site of a building.

MODE FOR EMBODYING THE INVENTION

[0042] Hereinafter will be described the present invention with reference to the attached drawings.

[0043] FIG. 1 is a view showing a multiplex water cutoff wall of the present invention in principle, and this multiplex water cutoff wall is constituted of a plurality of water cutoff walls (or water cutoff walls 1A, 1B, 1C, 1D) disposed in a multiplex configuration with gaps in the wall thickness direction and a drainage means (or drain pumps 4a, 4b, 4c) for discharging water having infiltrated between the water cutoff walls to the outside.

[0044] In cases where a water cutoff performance of the outermost water cutoff wall 1A can be completely secured when a rise in water level is caused outside (0) the multiplex water cutoff wall during flooding, no infiltration of water into the interior (I) would be caused, in which case, however, there is difficulty in securement of a complete degree of water cutoff performance in actuality, and besides, much cost is incurred. For that reason, the water cutoff walls 1A, 1B, 1C, 1D shall be laid out on the assumption that no complete degree of water cutoff performance is reached.

[0045] When the drain pump 4a for draining the infiltrating water is provided between the water cutoff walls 1A, 1B to discharge the infiltrating water to the outside of the multiplex water cutoff wall, the water level between the water cutoff walls 1A, 1B can be kept lower than the water level outside (0) the water cutoff wall 1A (or the water level of an outside area).

[0046] When the water cutoff walls disposed doubly will not do, the number of water cutoff walls shall be increased such that more multiple water cutoff walls such as the third and the fourth water cutoff walls 1C, 1D are disposed, and on this occasion, the water infiltrating between the respective water cutoff walls is discharged with the drain pumps 4b, 4c, as shown in FIG. 1. By so doing, the level of infiltrating water is lower nearer the interior to allow water infiltration into the interior of the multiplex water cutoff wall to be controlled, thereby preventing flood damage to a structure in the interior protected by the multiplex water cutoff wall.

[0047] FIG. 2 is a horizontal sectional view showing one embodiment of the multiplex water cutoff wall of the present invention, and FIG. 3 is a vertical sectional view correspondingly showing the embodiment shown in FIG. 2.

[0048] This embodiment is meant to indicate that the water cutoff walls 1A, 1B formed of water cutoff panels 2 are provided doubly between two supports 11 disposed with a gap. While this embodiment shown is based on the assumption of installation in an opening of a flood barrier 21 and the like, it is to be understood that no limitation is particularly imposed on a water cutoff wall installation position and/or size.

[0049] In this embodiment, the supports 11 are respectively provided with two vertically-extending guide grooves 12a, 12b, and the water cutoff panels 2 formed of reinforced plastic or metal plates and normally kept in a storage place are vertically disposed in three stages in a shape in which both ends of each water cutoff panel 2 are respectively fitted from above into the guide grooves 12a, 12b of the supports 11 facing each other. A commonly-used water cutoff material is interposed in the groove portions of the guide grooves 12a, 12b and/or between the water cutoff panels 2 to allow water leakage through clearances to be minimized.

[0050] It is to be herein noted that the present invention is not aimed at expecting any complete degree of water cutoff performance in each of the multiple water cutoff walls 1A, 1B, but is to allow the water level between the water cutoff walls 1A, 1B disposed doubly to be controlled lower than the water level outside the multiplex water cutoff wall by draining the infiltrating water to the outside with the drainage means such as the drain pump 4, on the assumption of the occurrence of water infiltration from the outside.

[0051] The water level between the water cutoff walls 1A, 1B disposed doubly is controlled lower so that the water pressure applied to the water cutoff wall 1B on the interior side is relatively lessened, thus allowing the amount of water infiltrating into the interior of the second water cutoff wall 1B to be controlled lower. While installation of the third and the fourth water cutoff walls inside the water cutoff walls disposed doubly as shown in FIG. 1 would result in allowing the water infiltration into the interior of the multiplex water cutoff wall to be more controlled in principle, it can be believed that the water cutoff walls disposed doubly or triply will do in usual conditions.

[0052] FIG. 4 is a horizontal sectional view showing another embodiment of the multiplex water cutoff wall of the present invention, and FIG. 5 is a vertical sectional view correspondingly showing the embodiment shown in FIG. 4.

[0053] This embodiment is meant to indicate that openable-type water cutoff walls 1A, 1B formed of water cutoff panels 2a, 2b are provided doubly between two supports 11a, 11b disposed with a gap. While this embodiment shown is based on the assumption of installation in the opening of the flood barrier 21 and the like, it is to be understood that no limitation is particularly imposed on a water cutoff wall installation position and/or size.

[0054] In this embodiment, a side face of one support 11b is provided with a door pocket-shaped housing part 5 for housing the water cutoff panels 2a, 2b, wherein the water cutoff panels 2a, 2b housed in the housing part 5 can be moved slidably therefrom toward the other support 11a to seal the opening when the flood damage would be expected to occur.

[0055] This embodiment is similar to the embodiment shown in FIGS. 2 and 3 in the principle of water cutoff by the water cutoff walls disposed doubly or at least triply, together with the drainage means such as the drain pump.

[0056] FIG. 6 is a view schematically showing a flood barrier in cases where the multiplex water cutoff wall of the present invention is applied to a flood barrier opening. An embodiment shown in FIG. 6 is based on the assumption that a building 31 is the existing multiple dwelling house, and is also meant to indicate that in relation to flood-resistant renovation, the flood barrier 21 is constructed posteriorly in the site surrounding the building 31 so as to be in a shape which encloses nearly the entire periphery of the building 31

[0057] Structurally, the flood barrier 21 is constructed in the site surrounding the building 31 so as to be in the shape which encloses nearly the entire periphery of the building 31, and the multiplex water cutoff wall is provided in a section (not shown) serving as an entrance/exit during normal times such as the section leading to an entrance hall, to a parking place or to a place where residential wastes and others are to be carried out, wherein the multiplex water cutoff wall is provided as an opening sealing means for sealing the opening of the above section in a watertight manner. When there arises the risk of inundation caused by flooding or storm surges, the opening is sealed with the multiplex water cutoff wall (or the multiplex water cutoff wall shown in FIGS. 2 to 5), thereby forming a tranquil space 3 isolated inside the flood barrier 2.

[0058] The flood barrier 21 is made to be at least as tall as an inundation depth estimated to occur in an area where the building 31 is located, and hence, the flood barrier height can be arbitrarily set to be at least as equal as the estimated inundation depth in consideration of the securement of safety even in a state of emergency, such as at least 2 to about 3 m for the estimated inundation depth up to 2 m, at least 4 to about 5 m for that up to 4 m, and at least 5 to about 6 m for that up to 5 m, for instance.

[0059] The flood barrier 21 shall be watertight and can be formed by placing L-shaped blocks of watertight concrete side by side, followed by interposing a water cutoff material such as packing between the L-shaped blocks, for instance. Alternatively, the flood barrier 21 may be also formed of cast-in place concrete.

[0060] Of course, the flood barrier 21 shall have a structure and durability which are capable of sufficiently resisting dynamic and static water pressures applied thereto during flooding and/or storm surges, and accordingly, a buttress and/or a stay is additionally installed as needed.

[0061] Further, the occurrence of inundation up to a great depth might involve the problems regarding an underground flow and/or a backflow in sewerage pipes, and hence, the flood barrier 21 shall also have a structure capable of overcoming such problems. Specifically, the depth of embedment of the flood barrier 21 may be set deeper and/or a foundation part of the flood barrier 21 may be subjected to ground improvements as needed. Further, a check valve 38 may be provided in a pipeline leading to the outside.

[0062] While the flood control measures through the flood barrier 21 is to enable safe vertical refuge with ease, it is to be understood that there exists the need to cope with even a situation in which the duration of inundation in the area around the building is at least as long as one week, for instance, because of the fact that the residents would not be basically allowed to go into or out of the building by land when the inundation up to a great depth is caused in the area around the building.

[0063] Accordingly, in this embodiment, an emergency-use water receiving tank 34 is installed, together with an emergency-use generator 35, on the rooftop of the building 31 separately from a normal-use water receiving tank, and besides, an emergency-use septic tank 36 is also installed underground in the site, whereby the living environment of a long-term refuge at least as long as one week to about one month can be ensured, for instance. Further, on the occasion of the occurrence of significantly high precipitation caused by heavy rainfall, a rainwater storage tank 37 installed underground in the site is applied to control a rise in water level resulting from rainfall inside the flood barrier 21. Thus, rainwater fallen in a place enclosed with the flood barrier 21 can be once stored in the rainwater storage tank 37 and then drained to the outside of the flood barrier 21 with the drain pump as needed.

[0064] In this embodiment, the periphery of the building 31 is enclosed with the tall flood barrier 21, so that there would be such problems that a hindrance to sunlight or like natural lighting by the flood barrier 21 may result in creation of the shade and/or some residents on the first and the second floors of the building may be caused to have a cooped-up feeling, in which case, however, the problems regarding the hindrance to natural lighting and/or the resident's cooped-up feeling can be relieved by way of providing a large-sized transparent window in the flood barrier 21.

[0065] For the window, use can be made of a polycarbonate window material or like window material, for instance, in view of strength and durability. Further, for the purpose of preventing damage to a window installing portion of the flood barrier 21, a steel window frame or like high-strength window frame can be also incorporated into the window installing portion to mount the window material thereto.

[0066] Moreover, the flood barrier 21 can be provided also in the form of a regionally symbolized spot-like structure by applying various decorations thereto in consideration of its external appearance, so that the building 31 is allowed also to raise its value of property.

EXPLANATION OF REFERENCE NUMERALS

[0067] 1A, 1B, 1C, 1D . . . Water cutoff wall, 2, 2a, 2b . . . Water cutoff panel, 4, 4a, 4b, 4c . . . Drain pump, 5 . . . Housing part, 11, 11a, 11b . . . Support, 12a, 12b . . . Guide groove, 21 . . . Flood barrier, 31 . . . Building, 33 . . . Space, 34 . . . Water receiving tank, 35 . . . Emergency-use Generator, 36 . . . Septic tank, 37 . . . Rainwater storage tank, 38 . . . Check valve