JP2013212861A - Method for regenerating fire-prevention water tank and the regenerated fire-prevention water tank - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a method for regenerating a decrepit fire-prevention water tank so as to maintain the form of the water tank and to prevent water leakage, and to provide the regenerated fire-prevention water tank.SOLUTION: An impermeable sheet body 3 having inside water bags 6, 7 for sealing is laid along a wall surface of an existing fire-prevention water tank A. Water is supplied to the water bags 6, 7 of the impermeable water sheet 3 to form a sheet water tank 10. A plurality of blocks 11 is stacked in the sheet water tank 10 to the vicinity of a ceiling of the fire-prevention water tank A. A second impermeable sheet body 13 having inside water bags 6, 7 for sealing is covered between the blocks 11 and the ceiling of the fire-prevention water tank A. Water is supplied to the sheet water tank 10 through a cylinder pipe 12 provided below a manhole 2 of the fire-prevention water tank A to form a water storage tank.

Description

  The present invention relates to a method for correcting a fireproof water tank and a corrected fireproof water tank. More particularly, the present invention relates to a method for correcting an existing concrete aged fireproof water tank and its fireproof water tank.

  As a product, concrete fireproof water tanks typified by fireproof water tanks for fire fighting have been certified by the Japan Fire Fighting Equipment Safety Center, and their sizes have been standardized. For this reason, many fire tanks of the same type are installed throughout the country. Along with this, the installation year is old, and there are many aging fire prevention water tanks. As a result, there are an increasing number of fire prevention water tanks in which problems such as water leakage occur and maintenance is forced.

  In general, although it was initially put into practical use as a standard product with excellent functions such as earthquake resistance, durability, and water-stopping, its use beyond the service life is limited. In particular, when water leaks, the function as a fireproof water tank is lacking, which is a problem. In addition, since it is installed on the ground or in the ground, it must be taken into consideration that it will be damaged by natural disasters such as earthquakes. For this reason, in order to reinforce or repair the fire prevention water tank, conventionally, after draining the water, for example, the inner wall is subjected to shaving, washing, joint sealing, etc., and waterproofing such as applying waterproof mortar is performed. Was.

  Such a construction method has been a problem in terms of man-hours and costs. In particular, in disasters such as earthquakes, the fire prevention water tank itself collapses and is damaged, and it is necessary to reconstruct the fire prevention water tank body in addition to measures for preventing water leakage. For this reason, various proposals have recently been made as countermeasures. For example, a water-stopping material with elasticity is lined on the wall of the fire prevention water tank, a passage for human inspection is provided along the wall surface, a block etc. is arranged at the center of the fire prevention water tank and covered with a water-proof sheet, and the internal storage The thing of the structure which provided the space is known (for example, refer patent documents 1-5).

  Moreover, the thing of the structure which only linings a soft resin-like seal | sticker and a bag on the inner wall of a fire prevention water tank is also known (for example, patent documents 6-8). Furthermore, in the structure which prevents the collapse of a fire prevention water tank, the thing of the structure which piles up a frame body unit in a fire prevention water tank and fills a clearance gap between inner walls is known (for example, refer patent document 9). .

JP 2010-53628 A JP 2010-120688 A JP 2010-179842 A JP 2011-255914 A Japanese Patent Laid-Open No. 9-217394 JP-A-8-260527 Japanese Patent Laid-Open No. 9-3989 JP-A-11-152182 JP 2007-314217 A

  However, conventional construction, such as water leakage prevention treatment construction by applying an epoxy resin, has been liable to crack in natural disasters such as earthquakes and cause water in the water tank to leak before its useful life. For this reason, the aforementioned proposal is presented. However, construction using only a seal or a bag has a certain effect for preventing water leakage, but there is a problem with measures against collapse damage. Moreover, only the structure which piles up a block in the center of a water tank for collapsing prevention is a structure which has a space between inner walls. In the event of a disaster such as an earthquake, there is a risk that the rubble will directly enter this space and directly damage the sheet or bag covering the block. Further, the stack of blocks may be broken by the impact.

  As a result, the sheet or the bag body may be damaged, and the water stored inside may be leaked. In addition, a structure that only has a soft resin seal on the inner surface is effective to prevent water leakage, but if the inner wall or a crack is generated due to an earthquake or the like, the fire prevention water tank itself will be destroyed due to collapse. It will lose its effect. In addition, a fire prevention water tank that prevents the collapse of the inner walls of the fire prevention water tank has also been proposed, but it is not sufficient for preventing water leakage, and even if the corner collapse is prevented, its function cannot be performed if water leaks. Will end up. Therefore, there has been a demand for a correction method that can be easily and quickly corrected without performing a construction that involves repairing a crack in a concrete wall as in the prior art.

  The present invention has been made to solve such a conventional problem and achieves the following object. An object of the present invention is to provide a correction method capable of maintaining the form of a fire prevention water tank and preventing water leakage even when collapsed due to an earthquake or the like, and to provide the corrected fire prevention water tank. Another object of the present invention is to provide a method for correcting an existing aging fire prevention water tank at a low cost and with easy construction in a short time, and a reconstructed fire prevention water tank.

In order to achieve the above object, the present invention is achieved by the following means. That is,
The fireproof water tank corrected according to the first aspect of the present invention includes an existing fireproof water tank, a water shielding sheet body that forms a sealed frame along the concrete wall of the fireproof water tank, and forms a sealed water bag inside.
Water supplied to the water bag to form a sheet water tank having the enclosed frame configuration, a plurality of blocks stacked in the sheet water tank, and a water guide that is provided in the sheet water tank and communicates with a manhole of the fire prevention water tank And a second water-impervious sheet body that is inserted between the concrete ceiling of the fire prevention water tank and the upper part of the block and forms a sealed water bag inside. .

  The corrected fire prevention water tank of the present invention 2 is the corrected fire prevention water tank according to claim 1, wherein the water shielding sheet body and the second water shielding sheet body are a double sheet body and the water is interposed between the sheets. It is the thing of the structure which forms a bag, It is characterized by the above-mentioned.

  The corrected fireproof water tank of the present invention 3 is the corrected fireproof water tank according to claim 1, wherein the water bag is a water bag having a tube shape portion or a futon shape portion.

The method for correcting a fireproof water tank according to the fourth aspect of the present invention is to construct a surrounding frame along a concrete wall of an existing fireproof water tank, lay a waterproof sheet body forming a sealed water bag inside, and supply water to the water bag And forming a sheet water tank constituting the surrounding frame by inflating the water shielding sheet body, stacking a plurality of blocks in the sheet water tank, and a water bag sealed inside between the block and the ceiling of the fire prevention water tank A second water-impervious sheet is formed, and a water guide path is provided in the sheet water tank so that water is introduced into the sheet water tank and stored.

  Since the fireproof water tank of the present invention has been corrected, a double water shielding sheet having a water bag along the wall of the fireproof water tank is used as a cushioning material so that it is in close contact with the concrete wall, and blocks are stacked. The rubble can be prevented from falling into the interior due to the collapse of the inner wall. Moreover, even if a collapse occurs, the rubble is blocked by this water-blocking sheet body and block, and even if water leaks due to cracks in the concrete wall, water is still stopped by the blocking sheet body, resulting in a collapse Even if there is water, it has become a fireproof water tank with a structure that maintains water storage capacity without leaking water.

FIG. 1 is an explanatory view showing a cross section of a fireproof water tank that has been corrected according to an embodiment of the present invention. FIG. 2 is an explanatory diagram showing the details of FIG. FIG. 3 is a partial cross-sectional view showing a prototype of a water shielding sheet body. FIG. 4 is a partial cross-sectional view illustrating the configuration of the water-impervious sheet body in a state where water is supplied. FIG. 5 is an external view of a water-impervious sheet body constituting a sheet water tank. FIG. 6 is an external view showing an example of a block. FIG. 7 is an external view of a second water-impervious sheet body formed of a futon-shaped portion.

Hereinafter, embodiments of the present invention will be described with reference to the drawings. FIG. 1 is an overall explanatory view of a fireproof water tank that has been corrected and shows an embodiment of the present invention in cross section, and FIG. 2 is a partial detailed explanatory view thereof. The figure shows a concrete fireproof water tank buried underground. This fire prevention water tank or water storage tank is a certified product that conforms to the standards of the Japan Fire Fighting Equipment Safety Center. This certified product is determined as a 40m ³ fire prevention water tank or 40m ³ , 60m ^{3 to} 100m ³ water storage tank depending on the size.

  In the description of the present embodiment, the fire prevention water tank will be described as a fire prevention water tank including a water storage tank. Fire tanks are made of concrete, and those buried underground are buried in underground pits, and the type varies depending on the weight placed on them. When this concrete fireproof water tank is buried for two or thirty years, the main body is cracked due to natural disasters such as deterioration over time of concrete or collapse of the earthquake, and the water level of the water tank is lowered due to water leakage.

  For this reason, maintenance for repair is indispensable. The present embodiment is directed to the aging fire prevention water tank A, and a method for correcting the fire prevention water tank A and a fire prevention water tank (hereinafter referred to as “fire prevention water tank 1”) subjected to the correction. When the fireproof water tank 1 is used, a square water tank is filled with water, and a cylindrical manhole 2 is provided at the opening of the water tank for maintenance and water extraction. The lower part of the manhole 2 is a water conduit. When it is newly made and buried, the fireproof water tank may be divided and assembled, and the inner wall of the water tank is coated with a waterproof resin throughout its joints.

  However, when the service life is exceeded, the wall paint surface peels off or water leaks due to cracks in the concrete. For this reason, construction such as repair is required. Next, an embodiment of a method for correcting the aged fire prevention water tank A and its configuration will be described. In order to correct the aging fire prevention water tank A, the water in the water tank is first drained to an empty state. Next, an operator enters from the manhole 2 and the water shielding sheet body 3 is inserted through the manhole 2.

  This water-impervious sheet body 3 has a water-stop function and has a flexible structure, and is a synthetic resin body. It can withstand water erosion for a long time. It is folded at the time of insertion, but expands after insertion in the water tank. It has an endless structure along the wall of the aging fire prevention water tank A, has a bottom surface, and has an open top. When the water shielding sheet body 3 is in a standing state, the water shielding sheet body 3 is disposed with a gap from the concrete wall of the aging fire prevention water tank A, and its edge reaches the ceiling of the aging fire prevention water tank.

  Next, the structure of the water shielding sheet body 3 will be described with reference to FIGS. As shown in FIG. 3, the water shielding sheet body 3 is formed by laminating two single sheets 4, and is configured to supply water to the inside so that a water bag can be formed. A part of the superimposed water-impervious sheet body 3 is partitioned and fixed to be a fixing portion 5, and a space portion can be formed between the fixing portions 5, and a tube-shaped portion 6 that becomes a tube shape when water is supplied, It becomes the futon shape part 7 which becomes a flat futon shape when water is supplied.

  When all the water 9 is supplied to the overlapping space, the water shielding sheet body 3 has a form as shown in FIG. 4, and the tube shape portion 6 and the futon shape portion 7 form a water bag. Further, the water shielding sheet body at the bottom portion of the fire prevention water tank A is not a water bag, but is configured as a flat portion 8 that remains as a double sheet or as a single sheet. Water 9 is not supplied to the flat portion 8. When water 9 is supplied to all of the water bags, the water shielding sheet body 3 constitutes a surrounding frame along the concrete wall of the fire prevention water tank A as shown in FIG. The sheet water tank 10 of the formed water-impervious sheet body 3 is formed.

  In this case, the tube-shaped part 6 of the water-impervious sheet body 3 becomes a column and a girder of the sheet water tank 10, the futon-shaped part 7 becomes a wall, and the flat part 8 becomes a bottom. The sheet water tank formed by such a configuration forms a second fireproof water tank in the fireproof water tank A. When water is injected, this is basically the form, but the following construction is applied when forming the sheet water tank 10. First, the water shielding sheet body 3 is inserted from the manhole 2 in a folded state as described above.

  The inserted water-impervious sheet body 3 is spread over the entire bottom surface of the aged fire-proof water tank A, and when the position is determined, water is then poured into the tube-shaped portion 6 of the water-impervious sheet body 3. When the water is poured, the tube-shaped portion 6 rises in a columnar shape, and the water-impervious sheet body 3 is formed with a sheet water tank 10 as shown in FIG. Next, a plurality of blocks 11 are inserted from the manhole 2, spread in the sheet water tank 10, and stacked.

  As shown in the example of FIG. 6, the block 11 is of a size that can be inserted from the manhole 2, has strength, has an internal space, and has a resin configuration that allows a plurality of components to be stacked. Although the figure is of a square shape, it may be circular. The stacking operation of the blocks 11 is performed from the back of the fire prevention water tank A toward the manhole 2 side, the block 11 is accommodated therein, and the sheet water tank 10 included in the block 11 surrounded by the water shielding sheet body 3 is formed.

  When the blocks 11 are stacked up to the vicinity of the ceiling of the fire prevention water tank A and the space of the sheet water tank 10 is filled, water is poured into the futon shape portion 7 of the water shielding sheet body 3. Thereby, the futon-shaped part 7 swells and contacts the concrete wall and the block 11 of the fireproof water tank A to form a buffer wall. Accordingly, the sheet water tank 10 is fixed in the fireproof water tank A.

  When the block 11 is laid down to the vicinity of the manhole 2, in order to secure a space for inserting a hose such as a fire engine, a water conduit body having a hole in the periphery, that is, a cylindrical tube 12 is inserted into this space. This water conduit body may be a rectangular frame body in addition to the circular shape.

  The cylindrical tube 12 is divided and is stacked corresponding to the stacking of the blocks 11. However, although this cylindrical tube 12 is divided, it may be integrated from the bottom to the manhole 2 side. At the time of assembling the water-impervious sheet body 3 and the block 11, the block 11 near the manhole 2 is liable to collapse toward the water conduit, so that the divided cylindrical tube 12 is also stacked from the bottom at the same time as the block 11. .

  In this way, the block 11 and the cylindrical tube 12 are stacked in order from the bottom. In the stacking of the blocks 11 and the construction of the water shielding sheet body 3, a part of the water shielding sheet body 3 may be hooked on a part of the ceiling of the fire prevention water tank A. Since the water-impervious sheet body 3 has a square shape, when water is supplied to the water bag, the water-impervious sheet body 3 may collapse due to the weight of the water.

  Although not shown, a protrusion may be partially provided on the upper portion of the tube-shaped portion or may be hung on a concrete ceiling with a wire or the like. As another construction example, in the initial stage of forming the sheet water tank, air may be supplied to the water bag to construct the temporary sheet water tank 10, and the water 9 may be supplied after the blocks 11 are stacked inside.

  Since the block 11 is exposed at the uppermost end of the block 11, the second water-impervious sheet body 13 shown in FIG. 7 is inserted and covered in a space between the upper ceiling. Most of the second water-impervious sheet body 13 is composed of the futon-shaped portion 7, but may have the tube-shaped portion 6. When the arrangement is determined, water 9 is supplied to the futon-shaped portion 7 and inflated to fill the gap between the ceiling of the fire prevention water tank A and the upper portion of the block 11.

  As a result, since the second water-impervious sheet body 13 serves as a buffer material, it is possible to prevent rubble due to collapse from entering the sheet water tank 10. By performing such construction, the water in the sheet water tank 6 can be kept clean and can be used as drinking water. In this way, the construction proceeds from the back of the fire prevention water tank A to the manhole 2 side, and finally the entire block 11 is covered with the water shielding sheet body 3 and the second water shielding sheet body 13. At the same time, this means that the outer space, that is, all the gaps including the ceiling and the inner wall are covered with a sheet of water bags, which functions as a cushioning material.

  Needless to say, when the water-impervious sheet body 3 is spread, the concrete wall is previously flattened and washed. Finally, a hose or the like is put into the cylindrical tube 12 and water is supplied. When the supply of water is received, the sheet water tank 10 becomes a water storage tank. The water-impervious sheet body 3 is deformed and closely adhered along the concave-convex shape of the contacting concrete.

  As a result, even if there is a cracked portion on the concrete inner wall, a sealed state can be secured without construction such as painting, preventing water leakage from the water storage tank and preventing rain leakage from the outside. Moreover, since the sheet | seat water tank 10 is comprised by the double single sheet | seat 4, it is a strong water tank which is hard to be damaged. Since the structure of the present invention has a double sheet structure as described above, and the water bag is used as a cushioning material, the water storage state is secured even if trouble such as collapse occurs, and it can be dealt with anytime in case of emergency such as fire fighting. it can.

A ... Aged fireproof water tank 1 ... Corrected fireproof water tank 2 ... Manhole 3 ... Water shielding sheet body 4 ... Single sheet 5 ... Adhering part 6 ... Tube shape part 7 ... Duvet shape part 8 ... Flat part 9 ... Water 10 ... Sheet water tank 11 ... Block 12 ... Cylindrical tube 13 ... Second impermeable sheet body

Claims (4)

An existing fire prevention tank (A),
A water shielding sheet body (3) which forms a surrounding frame along the concrete wall of the fire prevention water tank (A) and forms a sealed water bag (6, 7) inside;
Water (9) to be supplied to the water bag (6, 7) to form a sheet water tank (10) having the frame structure;
A plurality of blocks (11) stacked in the sheet water tank (10);
A water guide channel body (12) for water transfer provided in the seat water tank (10) and communicating with the manhole (2) of the fire prevention water tank (A);
The second water shield (10) is located above the seat water tank (10) and is inserted between the concrete ceiling of the fire prevention water tank (A) and the top of the block (11) to form a sealed water bag (6, 7) inside. A water sheet body (13);
A modified fire prevention water tank.   The fireproof water tank according to claim 1, wherein the water shielding sheet body (3) and the second water shielding sheet body (13) are a double sheet body and the water bag (6, 7) between the sheets. A fireproof water tank having a modified structure.   The corrected fire prevention water tank according to claim 1 or 2, wherein the water bag is a water bag having a tube shape part (6) or a futon shape part (7). A fence frame is constructed along the concrete wall of the existing fire prevention water tank, and a waterproof sheet body (3) is formed to form a sealed water bag (6, 7) inside.
Supplying water (9) to the water bags (6, 7) to inflate the water-impervious sheet body (3) to form a sheet water tank (10) constituting the enclosure frame;
A plurality of blocks (11) are stacked in the sheet water tank (10),
Between the block (11) and the ceiling of the fire prevention water tank (A), a second water shielding sheet (13) that forms a sealed water bag (6, 7) is laid inside,
A water channel (12) is provided in the sheet water tank (10), and water is guided and stored in the sheet water tank (10).

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