JPS592704Y2 - storage tank - Google Patents

Description

[Detailed description of the invention] This invention relates to a storage tank for storing liquid or the like.

As shown in Fig. 1, a conventional storage tank is constructed by forming waste concrete 2 on a foundation stone 1, installing a foundation M5 made of reinforcing bars 3 and concrete 4 on top of it, and placing concrete on this foundation plate 5. It has a structure in which a tank main body 6 is placed at the bottom.

In such a storage tank, a foundation plate 5, a pile of concrete 2 and foundation stones 1 are required under the bottomed tank body 6, which is not economical, and the tank body 6 and the foundation plate 5 are not properly fixed and may slip. Sometimes it would tilt or lean.

Furthermore, when the tank is buried underground, there is no problem if more than a certain amount of liquid, powder, granules, etc. are stored in the tank body 6, but if almost all of it is drained out. ,
There is an inconvenience that the stationary state of the tank body 6 becomes unstable and tilts.

This occurs because the buoyant force constantly applied to the tank body 6 from the groundwater causes the tank body 6 to float when the liquid etc. in the tank body 6 is discharged, and once it is tilted,
Since earth and sand enter between the tank body 6 and the foundation plate 5, it is not easy to return to the original state.

In particular, when the tank body 6 is a sewage septic tank, the foundation board 5
Because it is difficult to securely fix the liquid to the overflow weir, tilting due to the above-mentioned causes is likely to occur, and this tilting may disrupt the specified relationship between the internal liquid level and the overflow weir, or disrupt the specified air agitation. The device may become unable to perform its functions, and the intended function may not be achieved.

This idea improves the uneconomical aspect of providing a foundation plate below the bottomed tank body, and is an improved buried type that does not cause the inconvenience of the tank body tilting even if the internal liquid etc. is extracted. It is intended to provide a liquid storage tank.

An embodiment of this invention will be described below with reference to the drawings.

The tank body shown with reference numeral 11 in Fig. 2 is made of steel plate or FRP.
It has a cylindrical shape made of a certain material, and the peripheral wall at one end thereof is provided with through holes through which a large number of reinforcing bars 12 are inserted.

In this example, the grids are arranged vertically and horizontally at predetermined intervals to form a double lattice, but they may also be arranged to extend radially from the center of the tank body 11.

However, in either case, the end of the reinforcing bar 12 is connected to the tank body 11.
It must protrude an appropriate length beyond the outer edge of the

Then, a bottom plate 14 is formed by pouring concrete 13 at the bottom of the tank body 11 so that the reinforcing bars 12 are buried. and a floating prevention collar portion 14b.

The tank main body 11 having this bottom plate 14 is placed on a waste concrete 16 formed on a foundation stone 15.

In the storage tank configured in this way, the tank body 11 is as follows:
Since it has an integral structure with the bottom plate 14 made of reinforcing bars 12 and concrete 13, it is economical, and especially when the tank body 11 is buried in the soil with the upper end left intact, the ground is soft and the groundwater level is high. There is no fear that it will float up even if it receives a large buoyant force under certain conditions.

Therefore, even if most of the internal liquid is discharged, the tank body 1F will not tilt.

Further, in the example shown in FIG. 3, the tank main body 11 has a cross section in the shape of an ellipse divided into two by its short axis.

As shown in FIG. 4, the tank main body 11 having such a form is
Panel 1 made of FRP or the like having flanges 17 on both sides
It is made up of a combination of a plurality of members 11a, each of which is connected with bolts 8 and further tightened with piano wire 19 or the like.

The tank body 11 has a bottom plate 14 made of reinforcing bars 12 and concrete 13 at its lower end, as in the case of FIG.
are integrally installed.

In this case as well, the bottom plate 14 having the anti-floating flange 14b and having a large weight functions to reliably prevent the tank body 11 from floating.

Furthermore, in the examples shown in FIGS. 2 and 3, a load equivalent to the weight of the earth and sand located above is applied to the protrusion of the bottom plate 14 that protrudes to the outside of the tank body 11. The rise is further effectively prevented.

Since the bottom plate 14 is stronger than the tank body 11, it will not be destroyed by water pressure.

The bottom plate 14 may be provided integrally with the tank body 11 in advance and installed on a separately constructed foundation, or the tank body 11 may be installed on the foundation and the reinforcing bars 12 are installed in this state. Even if the concrete 13 is placed after inserting the reinforcing bars 12 into the tank body 11, the rollers are installed on the foundation and the concrete 13 is placed.
3 may be provided.

[Brief explanation of the drawing]

FIG. 1 is a vertical cross-sectional view of a conventional storage tank, FIG. 2 is a vertical cross-sectional view of a storage tank according to one embodiment of this invention, FIG. 3 is a vertical cross-sectional view showing another embodiment, and FIG. FIG. 4 is a perspective view of members constituting the tank body of the example in FIG. 3; 11... Tank body, 11 a... Member,
12...Reinforcement, 13...Concrete, 14...Bottom plate, 15...Foundation chestnut stone,
16... Waste concrete, 17... Flange section, 18... Panel, 19...
piano wire.

Claims (1)

[Scope of utility model registration request] The tank body is made of a thin plate material such as a steel plate or FRP, and has an open bottom, and a bottom plate is integrally attached to the tank body so as to close the bottom. A large number of reinforcing bars are provided so that their ends protrude outward through the tank, and a number of reinforcing bars are formed at the bottom of the tank body and at the flotation prevention collar on the outer periphery of the tank body so that the reinforcing bars are buried. 1. A storage tank characterized in that the tank is made of concrete and has a floating prevention flange formed on the outer periphery of the tank main body.