JP2020001776A - Weathering of tank pit, and installation method for weathering of tank pit - Google Patents

Abstract

To facilitate an installation of weathering.SOLUTION: The weathering of a tank pit according to the embodiment is weathering of the tank pit that closes a gap between the rain cover installed around a tank in the tank pit and a side of the tank, and is attached an upper end to the side of the tank installed in the tank pit, and has a waterproof sheet placed so as to cover a gap between the side of the tank and the rain cover.SELECTED DRAWING: Figure 2

Description

  The present invention relates to a rain pit in a tank pit and a method of installing the rain pit in a tank pit.

  A large-capacity tank is installed in a tank pit in consideration of leakage of liquid stored from the bottom or the bottom side peripheral wall of the tank due to corrosion or the like. When this type of tank pit is installed outdoors, rainwater enters the inside of the tank pit, and the tank pit cannot perform its original function.

  In order to prevent rainwater from entering the tank pit, a method of covering the entire tank pit with a roof together with the tank can be considered. However, installing a structure that accommodates the entire tank pit requires enormous costs and much time. Therefore, measures to cover the tank pit by installing a simple roof or the like around the tank have been considered. However, it is difficult to install a roof or the like without any gap around the tank with respect to the tank having a circular main shape. Therefore, various rain breaks have been studied to make the gap between the roof and the tank watertight.

Japanese Utility Model Laid-Open No. 3-17596

  However, the plurality of tanks installed in the tank pit may not have the same height and outer shape. For this reason, it is required to have a rain finish that can be easily installed regardless of the height and outer diameter of the tank.

  The present invention has been made under the above circumstances, and an object of the present invention is to facilitate installation of rain breaks.

  In order to solve the above-described problem, the rain pit of the tank pit according to the embodiment is a rain pit of the tank pit that closes a gap between the rain shield installed around the tank in the tank pit and the side of the tank. And a waterproof sheet having an upper end attached to a side surface of the tank installed in the tank pit and disposed so as to cover a gap between the side surface of the tank and the rain shield.

It is a top view for explaining a tank pit. FIG. 3 is a partial side view of the tank pit according to the first embodiment. It is a figure for explaining the waterproofing sheet concerning a 1st embodiment. It is a figure for explaining the waterproofing sheet concerning a 1st embodiment. It is a figure for explaining the installation method of the waterproofing sheet concerning a 1st embodiment. It is a figure for explaining the rain closing of the tank pit concerning a 2nd embodiment. It is a figure for explaining rain closing of a tank pit concerning a 3rd embodiment. It is a figure for explaining the waterproof sheet of the rain finish of the tank pit concerning a 4th embodiment. It is a figure for explaining the waterproof sheet of the rain finish of the tank pit concerning a 4th embodiment.

(1st Embodiment)
Hereinafter, the raining of the tank pit according to the first embodiment will be described with reference to the drawings. FIG. 1 is a plan view of the tank pit 2. However, there is no description of raining such as a rain shield or a waterproof sheet described later. FIG. 2 is a partial side view of the tank pit.

  The tank pit 2 is equipment for preventing the liquid from flowing out of the facility by storing the liquid leaking from the tank 1 in the tank pit 2 when the tank 1 is damaged. The tank pit 2 is installed by digging a ground G to form a foundation 4 and forming a weir 3 around the foundation 4. The height of the weir 3 is, for example, 1 m. The size of the base 4 depends on the number of tanks 1 to be installed and the size of the tanks 1. A plurality of tanks 1 are installed in the tank pit 2. The height and shape of the tank 1 vary. For example, the height of the tank 1 is about 12 m, and the outer peripheral length of the tank 1 is about 36 m.

  As shown in FIG. 2, a pillar 5 and a rain shield 6 are installed around the tank 1 installed in the tank pit.

  The rain shield 6 guides rainwater that has fallen on the tank pit 2 to the outside of the tank pit 2. The rain shield 6 is a simple roof made of, for example, a tin, a tent cloth, a vinyl chloride resin, or the like. The pillar 5 is a pillar that supports the rain shield 6. The pillar 5 is formed of a steel material such as an iron pipe. The pillar 5 stands on the ground G outside the foundation 4 and the weir 3. When the height of the weir 3 is 1 m, the length of the column 5 is, for example, about 0.7 m to 3 m. The length of each pillar 5 is formed such that the rain shield 6 can have an appropriate inclination. The pillar 5 and the rain shield 6 are connected using mounting brackets, bolts, nuts and the like. That is, the pillar 5 and the rain shield 6 have a structure that can be installed in a short time. In order to increase the strength, the columns 5 may be appropriately connected to each other using an iron pipe or the like. Further, the column 5 may be fixed to the weir 3. Further, the pillar 5 may be formed of wood. Further, the column 5 may be provided only in the tank pit 2.

  The plurality of tanks 1 are cylindrical, and the heights and shapes of the tanks 1 are different. It is difficult to provide the rain shield 6 around the tank 1 without gaps. In particular, it is more difficult when the tank 1 has a cylindrical shape. Therefore, a gap 7 is formed between the side surface of the tank 1 and the rain shield 6. The width of the gap 7 is, for example, about 10 cm to 30 cm. The rain shield 6 is provided around each tank 1 in FIG. 1 and covers the entire tank pit 2 except for the gap 7.

  The rain pit 100 of the tank pit according to the embodiment is a facility for covering the gap 7 formed between the side surface of the tank 1 and the rain shield 6 so that rainwater does not flow into the tank pit 2. The rain pit 100 of the tank pit according to the embodiment includes the waterproof sheet 10 and the attachment 20.

  The waterproof sheet 10 is attached to the side surface of the tank 1, and guides rainwater falling into the gap 7 between the side surface of the tank 1 and the rain shield 6 and rainwater flowing along the surface of the tank 1 onto the rain shield 6. As shown in FIG. 2, one end (upper end side) of the waterproof sheet 10 is fixed to a side surface of the tank 1 by a fitting 20 described later. The other end (lower end side) of the waterproof sheet 10 is disposed on the upper surface of the rain shield 6. The other end (lower end side) of the waterproof sheet 10 may be fixed to the rain shield 6 with bolts or the like.

  FIG. 3 shows a configuration diagram of the waterproof sheet 10. As shown in FIG. 3, the waterproof sheet 10 includes a plurality of sheets 10a wound around the tank 1 and a patch sheet 10b for closing a gap between the sheets 10a. Here, a case where the waterproof sheet 10 is configured by four sheets 10a will be described. Each sheet 10a is formed in a rectangular shape. The length L2 in the short direction of each sheet 10a is, for example, 1 m. The thickness of the sheet 10a is, for example, about 0.5 cm to 5 cm. The length L1 obtained by adding the lengths of the four sheets 10a in the longitudinal direction is the same as the outer circumference of the tank 1. It is not necessary that the lengths of the four sheets 10a in the longitudinal direction are the same. In the vicinity of the lower end of each sheet 10a, a plurality of holes 10c used for fixing the sheet 10a and the rain shield 6 are provided. The patch sheet 10b is a sheet used to close a gap formed between the sheets 10a and increase water tightness.

  The sheet 10a is formed of a lightweight material having high flexibility, elasticity, water tightness, and durability. For example, the sheet 10a is formed of a rubber sheet. Preferably, the sheet 10a is formed of a lightweight, highly watertight foamed rubber. The patch sheet 10b is formed of, for example, the same material as the sheet 10a, but may be formed of a different material.

  The attachment 20 is a fixture that is wound around the tank 1 via the waterproof sheet 10 (four sheets 10 a) arranged on the side surface of the tank 1 and fixes the waterproof sheet 10 to the side surface of the tank 1. For example, the attachment 20 is a band, preferably a ratchet pole band. Specifically, the attachment 20 includes a belt-like band made of stainless steel and a fastening member. The length of the band is longer than the outer length L1 of the tank 1.

(Mounting procedure)
Next, an example of an operation procedure for attaching the waterproof sheet 10 to the side surface of the tank 1 will be described. It is assumed that the pillar 5 and the rain shield 6 have already been installed. Here, a case where a commercially available rubber sheet having a width of 1 m wound around a drum is used for the waterproof sheet 10 and a commercially available ratchet type pole band is used for the attachment 20 will be described.

  First, the length L1 of the outer periphery of the target tank 1 is measured. Here, it is assumed that the length L1 of the outer circumference is about 36 m. Next, the rubber sheet wound around the drum is cut into pieces each having a length of 9 m, thereby forming four sheets 10a. The dimensions of the sheet 10a are 1 m in length and 9 m in width. Here, the case where the waterproof sheet 10 is constituted by four sheets 10a will be described, but the number of the sheets 10a is determined by the weight, elasticity, width of the gap 7, and the like of the rubber sheet. Increasing the number of sheets reduces the weight of one sheet 10a, and facilitates the work of fixing the sheet 10a to the rain shield 6. On the other hand, the number of patch sheets 10b connecting the sheets 10a increases, and the connection work time and the like increase.

  Next, the four sheets 10a are arranged around the tank 1 such that the upper ends of the sheets 10a are aligned on the same circumference. Specifically, the height from the end of the rain shield 6 close to the tank 1 to the surface of the foundation 4 is 3 m, the width of the gap 7 is about 30 cm, the length L2 of the waterproof sheet 10 in the short direction is 1 m, When the length of the sheet 10a to be arranged on the upper surface of the rain shield 6 is about 30 cm, the sheet 10a is arranged so that the upper end of the sheet 10a is aligned at a position of about 3.4 m from the surface of the foundation 4. At this time, the upper end of the sheet 10a may be fixed to the side surface of the tank 1 using an adhesive. By fixing the upper end of the sheet 10a to the side surface of the tank 1 using an adhesive, the water tightness between the tank 1 and the sheet 10a can be improved.

  Next, each sheet 10a is fixed to the rain shield 6 using the hole 10c so that the position of the sheet 10a is not shifted by its own weight. Thereby, when attaching the waterproof sheet 10 to the tank 1 using the attachment 20, it is not necessary to perform the work while suppressing the plurality of sheets 10a, and the working efficiency can be improved.

  Since there is a gap 7 between the tank 1 and the rain shield 6, the waterproof sheet 10 fixed to the side surface of the tank 1 and the rain shield 6 needs to have a lower side longer than the upper side length L1. . For example, when the radius of the tank 1 is 6 m and the width of the gap 7 is 10 cm, the length L1 of the upper side is about 37.7 m (2π × 6 m). The length of the lower side is about 38.3 m (2π × 6.1 m). Therefore, the length of the lower side needs to be about 60 cm longer than the length L1 of the upper side. The sheet 10a can be stretched because it has elasticity. For example, the sheet 10a is fixed to the rain shield 6 using the hole 10c in a state where the lower end side of the sheet 10a is extended so that no gap is generated between the sheets 10a.

  Next, the sheets 10a are connected by the patch sheet 10b. This is to prevent rainwater from flowing between the sheets 10a. The sheet 10a and the patch sheet 10b are connected by using an adhesive having excellent weather resistance and durability. As shown in FIG. 4, even if there is a gap between the sheets 10a, the gap can be eliminated by the patch sheet 10b, and water tightness can be ensured.

  Next, a stainless steel band-like band of the fixture 20 is wound over the waterproof sheet 10 arranged around the tank 1. The position where the band is wound is preferably near the upper end of the waterproof sheet 10 (for example, 1 cm to 5 cm). A clamp is provided at one end of the band, and the other end of the wound band is passed through the clamp to cut the band to a predetermined length.

  Next, the band is tightened by operating the tightening bracket. Since the waterproof sheet 10 has elasticity, the band-shaped band bites into the waterproof sheet 10, and the waterproof sheet 10 is fixed to the tank 1 in close contact.

  FIG. 5 shows a plan view of the tank 1 around which the waterproof sheet 10 and the attachment 20 are attached. A portion indicating the attachment 20 is hatched. The area around the waterproof sheet 10 is a rain shield 6. Each of the sheets 10a is fixed in close contact with the periphery of the tank 1 by the fixture 20. The sheets 10a are watertightly connected by a patch sheet 10b. The gap 7 between the tank 1 and the rain shield 6 is closed by the four sheets 10a.

  The above operation is performed for each of the plurality of tanks 1. Even when the shapes of the tanks 1 are different, it can be dealt with only by changing the size of the sheet 10a in the longitudinal direction. Further, since the waterproof sheet 10 is attached to the side surface of the tank 1, there is no need to change the dimensions of the sheet 10a even when the height of the tank 1 is different. Therefore, even if the shape of the tank 1 is various, it is possible to cope with it on site and work on site is easy.

(Action)
Next, a description will be given of a mechanism in which the rainwater falling on the tank pit 2 is guided outside the tank pit 2 by the rain pit 100 of the tank pit.

  As can be seen with reference to FIG. 2, the rainwater that has fallen on the tank 1 flows down along the side surface of the tank 1. A waterproof sheet 10 is closely attached to the side surface of the tank 1. Therefore, the rainwater flowing down along the side surface of the tank 1 does not flow between the side surface of the tank 1 and the waterproof sheet 10. The rainwater flows on the waterproof sheet 10, flows on the rain shield 6, and is guided along the rain shield 6 to the outside of the tank pit 2 (the weir 3). The rainwater that has fallen on the gap 7 between the tank 1 and the rain shield 6 travels on the waterproof sheet 10, flows over the rain shield 6, and travels along the rain shield to the outside of the tank pit 2 (cough 3). Be guided. Therefore, it is possible to prevent rainwater from flowing into the tank pit 2, and to maintain the original function of the tank pit 2.

  In the above description, the case where the shape of the sheet 10a is rectangular has been described, but the shape of the sheet 10a may be trapezoidal.

(Second embodiment)
In the description of the first embodiment, the case where the waterproof sheet 10 is fixed to the tank 1 with one attachment 20 has been described. However, as shown in FIG. 6, the waterproof sheet 10 may be fixed to the tank 1 using a plurality of attachments 20. The number of fittings 20 to be used may be determined in consideration of the weight of the waterproofing sheet 10, the wind force applied to the waterproofing sheet 10, the strength of the waterproofing sheet 10, the strength of the fittings 20, and the like.

  In addition, when there is a concave portion at an appropriate position on the side surface of the tank 1, if the mounting member 20 is attached using the concave portion, the mounting member 20 can be hardly displaced downward. Further, the water tightness between the tank 1 and the waterproof sheet 10 can be improved.

  Also, as shown in FIG. 6, a similar effect can be obtained by applying a caulking material 21 to the side surface of the tank 1 and attaching the fixture 20 using the caulking material 21.

(Third embodiment)
In the third embodiment, a case will be described in which there is no rain shield 6 as shown in FIG. In this case, the waterproof sheet 10 is arranged such that the lower end side of the waterproof sheet 10 that is not fixed to the side surface of the tank 1 hangs outside the weir 3.

  The rainwater falling along the side surface of the tank 1 and the rainwater falling on the gap 7 are guided by the waterproof sheet 10 to the outside of the tank pit 2 (weir 3). Therefore, it is possible to prevent rainwater from flowing into the tank pit 2, and to maintain the original function of the tank pit 2.

(Fourth embodiment)
In the first embodiment, the description has been given of the case where the waterproof sheet 10 is configured by four rectangular sheets 10a. However, the shape of the sheet 10a does not need to be limited to a rectangle. For example, as shown in FIG. 8, the shape of the sheet 10a may be fan-shaped.

  By fixing the shape of the sheet 10a to the fan shape, it is not necessary to extend and fix the sheet 10a when fixing the sheet 10a to the rain shield 6. On the other hand, since the radius of the tank 1 is close to 6 m, a rubber sheet of 6 m square is required to form the fan-shaped sheet 10a, and it is difficult to form the sheet 10a with a commercially available rubber sheet. Therefore, there is a disadvantage that the manufacturing cost is increased.

  When the shape of the sheet 10a is fan-shaped, a slit 10d may be provided as necessary, as shown in FIG. By folding the sheet 10a around the dotted line shown in FIG. 9, the sheet 10a can be easily adhered to the rain shield 6 and fixed.

  As described above, the rain pit 100 of the tank pit according to the present embodiment is attached to the side of the tank 1 installed in the tank pit 2, and the rain water falling on the tank pit 2 It has a waterproof sheet 10 leading to the outside. Thus, the rain pit 100 in the tank pit can prevent rainwater from flowing into the tank pit 2.

  Further, since the waterproof sheet 10 is attached to the side surface of the tank 1, there is no need to change the size of the waterproof sheet 10 even when the height of the tank 1 is high. Further, even when the height of the tank 1 is as high as 12 m, for example, the waterproof sheet 10 can be attached at a low place of, for example, about 3.4 m. As described above, since the mounting operation can be performed at a location 1/4 to 1/3 of the height of the tank 1, safety and simplification of the operation can be achieved. Therefore, the rain pit 100 of the tank pit can be manufactured at low cost, and the rain pit can be easily installed, and the installation time on site can be reduced.

  The waterproof sheet 10 includes a plurality of sheets 10a and a patch sheet 10b that closes a gap between each of the sheets 10a. Thereby, the water density between the sheets 10a can be increased. When the sheet 10a is rectangular, the sheet 10a can be formed from a commercially available rubber sheet, so that the rain pit 100 in the tank pit can be manufactured at low cost.

  Since the waterproof sheet 10 is formed of a rubber sheet, the waterproof effect is high.

  When foam rubber is used as the material of the waterproof sheet 10, the weight of the waterproof sheet 10 can be reduced. This allows the rain pit 100 in the tank pit to reduce the load applied to the fixture 20. In addition, since the waterproof sheet 10 becomes lighter, it is possible to easily set up the rain break, and it is possible to shorten the working time.

  The waterproof sheet 10 is fixed to the side surface of the tank 1 by tightening the waterproof sheet 10 arranged on the side surface of the tank 1 from the surroundings using the attachment 20. Thereby, the waterproof sheet 10 can be fixed to the side surface of the tank 1 in close contact with the side surface.

  If a band, preferably a ratchet pole band, is used as the attachment 20, the band can be easily tightened. Therefore, the work time for attaching the waterproof sheet 10 to the side surface of the tank 1 can be reduced. In addition, since the ratchet type pole band is commercially available, the manufacturing cost of the rain pit 100 of the tank pit can be reduced.

  Note that the above-described operation procedure for attaching the waterproof sheet 10 to the tank 1 is an example, and it is not necessary to limit to this. For example, four sheets 10 a are arranged around the tank 1, and the upper end of the sheet 10 a is fixed to the side surface of the tank 1 with an adhesive while the sheet 10 a is hung down on the side surface of the tank 1. The waterproof sheet 10 is fixed to the side surface of the tank 1 with the attachment 20. The end of the sheet 10a that is not fixed to the tank 1 is rolled up and placed on the upper surface of the rain shield 6, and the sheet 10a is fixed to the rain shield 6 using the hole 10c. After fixing the four sheets 10a, the sheets 10a are connected with the patch sheet 10b. Such a work procedure may be adopted.

  In the above description, the waterproof sheet 10 is fixed to the tank 1 using the attachment 20. However, the attachment 20 may not be used in some cases. For example, when the waterproof sheet 10 is lightweight, it may only be necessary to attach the waterproof sheet 10 to the side surface of the tank 1 with an adhesive. When the waterproof sheet 10 has high strength, the waterproof sheet 10 may be installed in a stable state only by fixing the waterproof sheet 10 to the rain shield 6. However, even in this case, in order to ensure watertightness, it is desirable that the upper end portion of the waterproof sheet 10 and the side surface of the tank 1 be bonded with a caulking material or the like.

  Although the embodiments of the present invention have been described above, these embodiments are presented as examples and are not intended to limit the scope of the invention. These new embodiments can be implemented in other various forms, and various omissions, replacements, and changes can be made without departing from the gist of the invention. These embodiments and their modifications are included in the scope and gist of the invention, and are also included in the invention described in the claims and their equivalents.

DESCRIPTION OF SYMBOLS 1 ... Tank 2 ... Tank pit 3 ... Cough 4 ... Foundation 5 ... Pillar 6 ... Rain protection 7 ... Gap 10 ... Waterproof sheet 10a ... Sheet 10b ... Patch sheet 10c ... Hole 10d ... Slit 20 ... Fixture 21 ... Caulking material 100 ... Rain in tank pit

Claims (9)

A rain pit of a tank pit that closes a gap between a rain shield installed around a tank in a tank pit and a side surface of the tank,
A waterproof sheet whose upper end is attached to a side surface of a tank installed in the tank pit and is arranged to cover a gap between the side surface of the tank and the rain shield,
Tank pit with rain. An upper end portion is attached to a side surface of the tank installed in the tank pit, and has a waterproof sheet disposed so as to cover a gap between the side surface of the tank and a side wall of the tank pit.
Rain in the tank pit. The waterproof sheet is configured by a plurality of sheets wound around the tank and arranged, and a patch sheet that closes a gap between each of the sheets.
The rain pit of the tank pit according to claim 1 or 2. The plurality of sheets are rectangular in shape;
The rain pit of the tank pit according to claim 3. The sheet is formed of a material using rubber,
The rain pit of the tank pit according to claim 3 or 4. The sheet is formed of foam rubber;
A rain pit of the tank pit according to any one of claims 3 to 5. It has a fitting wound around the tank via the waterproof sheet disposed on the side surface of the tank, and fixing the waterproof sheet to the side surface of the tank,
The rain pit of the tank pit according to any one of claims 1 to 6. The attachment is a band,
The rain pit of the tank pit according to claim 7. A step of arranging a waterproof sheet that guides rainwater to the outside of the tank pit, on the side of the tank installed in the tank pit,
Fixing the waterproof sheet to the side surface of the tank by tightening the waterproof sheet disposed on the side surface of the tank from around the waterproof sheet, using an attachment;
How to install tank pits including rain.

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