JP2003193555A - Septic tank equipment and installation method for it - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide septic tank equipment and an installation method for it having a structure with excellent mechanical strength, water resistance, and durability. <P>SOLUTION: A protection part 60 is arranged on a concrete base board 63 around the corner of a septic tank 10. The protection part 60 includes reinforcement 65, a concrete cylinder body 61, and concrete 30. The reinforcement 65 extends from the concrete base board 63, and the concrete cylinder body 61 arranged on the concrete base board 63 includes the reinforcement 65. The inside of the concrete cylinder body 61 is filled with the concrete 30. <P>COPYRIGHT: (C)2003,JPO

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a septic tank facility and a method for installing the septic tank facility.

[0002]

2. Description of the Related Art In a general septic tank facility, a septic tank is installed at the bottom of an installation hole opened in the ground, and a tubular protective portion is provided at an appropriate position such as a corner of the septic tank. The above-mentioned protective part is usually provided around a plurality of reinforcing bars extending from one surface of the concrete substrate with a corrugated cardboard cylinder made of paper,
After backfilling the installation holes, it is formed by pouring concrete into the corrugated cardboard cylinder.

However, since the corrugated cardboard cylinder is made of light and water-absorbent paper, the strength of the protective portion cannot be guaranteed. For example, when green concrete is poured into a corrugated cardboard cylinder, the corrugated cardboard cylinder may be lifted on the concrete substrate by the pressure received from the green concrete.

When the above-mentioned situation occurs, a void is generated between the corrugated cardboard cylinder and the concrete substrate, the reinforcing bars are corroded through the void, and cracks are caused in the poured concrete over time. Will be triggered.

Furthermore, when filling the inside of the corrugated cardboard cylinder with fresh concrete, concrete pouring failure may occur such as generation of voids due to aggregates contained in the fresh concrete. When such a concrete pouring failure occurs, it is not possible to secure sufficient mechanical strength with a corrugated cardboard cylinder with low mechanical strength, and when the ground surface of the septic tank burying part is used for a parking lot, etc. May cause problems such as the depression of the ground surface.

[0006]

SUMMARY OF THE INVENTION An object of the present invention is to provide a septic tank facility having a structure excellent in mechanical strength, water resistance and durability and a method of installing the same.

[0007]

In order to solve the above-mentioned problems, the septic tank facility according to the present invention includes a concrete substrate, a septic tank, and a protection part. The protection part includes a plurality of reinforcing bars and a concrete cylinder, and is arranged around the septic tank. The plurality of reinforcing bars extend from the concrete substrate. The concrete cylinder is placed on the concrete substrate, surrounds the plurality of reinforcing bars, and is filled with concrete.

As described above, the septic tank facility according to the present invention includes the protective part, and the protective part includes the concrete cylinder, so that the problems of the septic tank facility according to the prior art can be solved.
That is, by using the protective portion including the concrete cylinder, the protective portion on the concrete substrate,
It can be prevented from being lifted by the pressure received from the ready-mixed concrete poured into the concrete cylinder. Therefore, no void is generated between the concrete cylinder and the concrete substrate. Since there are no voids, it is possible to prevent corrosion of the reinforcing bars inside the concrete cylinder.

The mechanical strength of the concrete cylinder itself is extremely higher than that of the corrugated board cylinder. Therefore, even if defective concrete placement occurs, such as the formation of voids due to aggregates contained in the fresh concrete when the fresh concrete is filled, sufficient mechanical strength can be ensured. Therefore, when the ground surface of the part where the septic tank is buried is used for a parking lot or the like, it is possible to avoid the problem that the ground surface is depressed. Moreover, the concrete cylinder has almost no water absorption. Therefore, a septic tank facility having a structure having excellent mechanical strength, water resistance, and durability can be realized.

Further, the protection portion includes a reinforcing bar, and the reinforcing bar is
Since it extends from the concrete substrate, the reinforcing bar can be integrated with the concrete substrate.

In addition to the above construction, the concrete cylinder is
Since it is placed on the concrete substrate and surrounds the rebar, and the inside is filled with concrete, the concrete substrate, the concrete cylinder and the rebar are integrated through the filled concrete to protect the septic tank. A highly effective protective structure can be realized.

The method for installing septic tank equipment according to the present invention includes the following steps. First, the concrete substrate and the septic tank are placed on the bottom of the installation hole. Next, the protection unit is installed on the concrete substrate. Each of the protection parts has a reinforcing bar extending from a concrete substrate and a concrete tubular body surrounding the reinforcing bar. Next, the concrete cylinder is filled with green concrete. Backfill before filling with fresh concrete.

Other objects, configurations and advantages of the present invention will be described in more detail with reference to the accompanying drawings. The accompanying drawings are merely examples.

[0014]

FIG. 1 is a partial cross-sectional view of septic tank equipment according to the present invention. The illustrated septic tank facility includes a concrete substrate 63, the septic tank 10, and a protection unit 60. The septic tank 10 is placed on the concrete substrate 63.

The protective portion 60 is provided on one surface of the concrete substrate 63 near the corner of the septic tank 10. Although the concrete substrate 63 shown in the figure also receives the septic tank 10, the concrete substrate for receiving the septic tank 10 and the concrete substrate provided with the protective portion 60 may be independent.

The protective portion 60 includes a plurality of reinforcing bars 65, a concrete cylinder 61, and concrete 30. Rebar 6
Reference numeral 5 extends from the concrete substrate 63, and the concrete tubular body 61 is placed on the concrete substrate 63 and includes the reinforcing bars 65 therein. Concrete cylinder 61
Is called a fume tube, the inside of which is filled with concrete 30. Around the rebar 65
The loop reinforcing bars 66 are arranged at appropriate intervals, and thus the reinforcing bars 65 are restrained.

Although only two protective parts 60 are shown in FIG. 1, since the ordinary septic tank 10 has four corners, the actual number of the protective parts 60 installed is four, and the septic tank is four. One protective portion 60 is provided near each of the four corners of 10. However, the number of the protection units 60 may be four or more. Reinforcing bar 65 has a concrete substrate 6 at the end.
Embedded in 3.

The septic tank 10 shown is merely an example, and it is possible to incorporate a septic tank according to a well-known technique having a structure different from that shown, or a septic tank which may be proposed from now on.

Further, referring to FIG. 1, the concrete slab 100 includes a part of the reinforcing bars 65 included in the protection portion 60. A part of the reinforcing bar 65 is bent so as not to be exposed from the ground surface (GL) and the surface of the concrete slab 100 installed in the region where the septic tank 10 is buried. Preferably, the concrete slab 100 forms the same horizontal plane as the ground surface (GL) and the lid 81 of the septic tank 10.

As described above, in the septic tank facility according to the present invention, the concrete tubular body 61 is used for the constituent portion of the protective portion 60, so that the concrete (fresh concrete) 30 filled inside the concrete tubular body 61 is used. With the pressing force of, the concrete cylinder 61 can be prevented from rising. Therefore, it is possible to prevent a gap from being generated between the concrete tubular body 61 and the concrete substrate 63, so that the reinforcing bar 65 inside the concrete tubular body 61 is prevented.
Can be prevented from being deteriorated by oxidation.

Further, the mechanical strength of the concrete tubular body 61 is extremely higher than that of the conventional corrugated cardboard tubular body. For this reason, when the concrete cylinder 61 is filled with ready-mixed concrete, sufficient mechanical strength is ensured even if a concrete placement failure occurs, such as the formation of voids due to aggregates contained in the ready-mixed concrete. be able to. Therefore, when the ground surface of the part where the septic tank is buried is used for a parking lot or the like, it is possible to avoid the problem that the ground surface is depressed. Moreover, the concrete cylinder 61 has almost no water absorption. Therefore, a septic tank facility having a structure having excellent mechanical strength, water resistance, and durability can be realized.

The septic tank 10 is composed of the concrete substrate 6
Since it is placed on top of 3, the undesired settlement of the septic tank 10 can be prevented and the purifying function failure of the septic tank 10 can be avoided.

The protection portion 60 includes reinforcing bars 65, and since these reinforcing bars 65 extend from the concrete substrate 63, the reinforcing bar 65 can be integrated with the concrete substrate 63.

In addition to the above structure, the protective portion 60 includes a concrete cylinder 61, and the concrete cylinder 61 is placed on the concrete substrate 63 and surrounds the reinforcing bars 65. Concrete 30 is filled in the concrete tubular body 61. According to this structure, the concrete substrate 63, the concrete cylinder 61 and the reinforcing bar 65 are provided.
Can be integrated through the concrete 30 to realize a protective structure having a high protective action on the septic tank 10.

Next, a method for installing the septic tank according to the present invention will be described with reference to FIGS. In the figure,
The same reference numerals are given to the same components as those shown in FIG. 1 and duplicate description will be omitted.

FIG. 2 is a cross-sectional view showing steps included in the method of installing the septic tank according to the present invention. Referring to FIG.
The concrete substrate 63 is installed on the bottom 51 of the installation hole 50. The size and shape of the concrete substrate 63 are large enough to support the septic tank 10 which is a part of the septic tank facility. Although the concrete substrate 63 shown in the figure also receives the septic tank 10, the concrete substrate for receiving the septic tank 10 and the concrete substrate provided with the protective portion 60 may be independent from each other, as described above.

As shown in the figure, the reinforcing bar 65 extends vertically from the concrete substrate 63 and extends beyond the ground surface (GL). Referring to FIG. 2, the number of the reinforcing bars 65 extending upward from the concrete substrate 63 is three, but it may be three or more or less.

The reinforcing bars 65 are arranged at a distance from each other. The length indicated by the arrow L1 approximately matches the height of the septic tank 10. The lid 81 of the septic tank 10 forms the same horizontal plane as the ground surface (GL).

FIG. 3 is a sectional view showing a step that follows the step shown in FIG. As shown, the concrete cylinder 6
1 is placed on the concrete substrate 63 and contains a reinforcing bar 65 extending from the concrete substrate 63. The concrete tubular body 61 is hollow and has an inner diameter large enough to allow the reinforcing bars 65 to pass therethrough. Referring to FIG. 3, the concrete cylinder 61 projects from the ground surface, but this is merely an example.

FIG. 4 is a sectional view showing a step that follows the step shown in FIG. Referring to FIG. 4, the septic tank 10 is placed on the concrete substrate 63. As shown,
The lid 81 of the septic tank 10 forms the same horizontal plane as the ground surface (GL). Although not shown, the septic tank 10 is fixed to the concrete substrate 63. Fixing method is septic tank 10
Any method may be used as long as it can be stably fixed to the concrete substrate 63.

The process for installing the septic tank equipment shown in FIG.
It does not necessarily have to be exactly the same as the step shown in FIG. The septic tank 10 shown is an example of a septic tank that is currently manufactured and sold, and a septic tank that is newly manufactured and sold may be used.

FIG. 5 is a sectional view showing a step that follows the step shown in FIG. 4, and FIG. 6 is an enlarged partial sectional view taken along the line 6-6 of FIG. Referring to the drawing, the ready-mixed concrete 30 is filled in each hollow portion of the concrete tubular body 61. When the ready-mixed concrete 30 is solidified, the concrete substrate 63, the concrete tubular body 61 and the reinforcing bar 65 are unified, so that the concrete tubular body 61 can be reliably fixed to the concrete substrate 63. Before the fresh concrete 30 is filled, the surroundings of the septic tank 10 may be backfilled.

As described above, by using the concrete tubular body 61 made of concrete for the constituent portion of the protective portion 60, the concrete tubular body 61 is pressed by the raw concrete 30 filled in the concrete tubular body 61. It is possible to prevent floating from 63. Therefore, it is possible to prevent a gap from being generated between the concrete tubular body 61 and the concrete substrate 63, so that it is possible to prevent the reinforcing bar 65 inside the concrete tubular body 61 from being deteriorated.

FIG. 7 is a sectional view showing a step that follows the step shown in FIG. Referring to FIG. 7, the septic tank 10 is buried in the ground, and the lid 81 and the protection unit 60 of the septic tank 10 are included.
Only the upper surface of is exposed to the ground surface (GL). After this,
By forming the concrete slab 100 (see FIG. 1), the function of protecting the septic tank facility from the load applied to the lid 81 is secured when the car is parked on the buried septic tank facility.

The mechanical strength of the concrete cylinder 61 is extremely higher than that of the conventional corrugated cardboard cylinder. For this reason, when the concrete cylinder 61 is filled with ready-mixed concrete, sufficient mechanical strength is ensured even if a concrete placement failure occurs, such as the formation of voids due to aggregates contained in the ready-mixed concrete. be able to. Therefore, when the ground surface of the part where the septic tank is buried is used for a parking lot or the like, it is possible to avoid the problem that the ground surface is depressed.

[0036]

As described above, according to the present invention, it is possible to provide a septic tank facility having a structure excellent in mechanical strength, water resistance, and durability, and a method for installing the same.

[Brief description of drawings]

FIG. 1 is a partial sectional view of a septic tank facility according to the present invention.

FIG. 2 is a cross-sectional view showing steps included in the method for installing the septic tank shown in FIG.

FIG. 3 is a cross-sectional view showing a step that follows the step shown in FIG.

FIG. 4 is a cross-sectional view showing a step that follows the step shown in FIG.

FIG. 5 is a cross-sectional view showing a step that follows the step shown in FIG.

6 is a partially enlarged plan view of FIG.

FIG. 7 is a cross-sectional view showing a step that follows the step shown in FIG.

[Explanation of symbols]

10 septic tank 30 concrete 60 Protection 61 Concrete cylinder 63 Concrete substrate 81 septic tank lid 100 concrete slabs GL Ground surface

Claims (2)

[Claims] 1. A septic tank facility including a concrete substrate, a septic tank, and a protective part, wherein the protective part includes a reinforcing bar and a concrete cylinder, and is arranged around the septic tank. Is a septic tank facility that extends from the concrete substrate, the concrete cylinder is placed on the concrete substrate, surrounds the rebar, and is filled with concrete. 2. The method for installing the septic tank facility according to claim 1, wherein the concrete substrate and the septic tank are placed at the bottom of the installation hole, the concrete substrate has a protective portion, and the protective portion is Including a reinforcing bar and a concrete cylinder, the reinforcing bar extends from the concrete substrate, the concrete cylinder is placed on the concrete substrate, surrounds the reinforcing bar, then, inside the concrete cylinder A method for installing septic tank equipment including a step of filling fresh concrete.