JPH11210062A - Installation structure of vertical pipe - Google Patents

Abstract

PROBLEM TO BE SOLVED: To easily draw out a vertical pipe such as a sewage pipe even if the lower end thereof is embedded in concrete by embedding the lower end of the vertical pipe attenuating the power of the fluid flowing down from a guide passage provided in the inside and delivering it to the side of the lower end, into concrete through a cutoff layer. SOLUTION: A sewage vertical pipe 10 attenuating the power of fluid flowing down the inside of guide passages 12c, 14b provided in the inside and delivering it to the side of the lower end, is vertically arranged in a manhole 30, and the lower end of the sewage vertical pipe 10 is supported by a camber 33, and the inflow side connection part 11b of an inflow pipe 11 provided at the upper part of the vertical pipe 10 is connected to a horizontal inflow pipe 41 provided at the wall face 31 of the manhole 30. A pair of foamed rubber sheet 15 constituting a cutoff layer to concrete is doubly wound on the lower end of the outflow pipe 14 laid at the lower part of the sewage vertical pipe 10 and the delivery opening 14c thereof, and fixed thereto by wires 16. Thereafter, concrete is placed in the manhole to embed the lower end of the delivery opening 14.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to, for example, a vertically disposed sewage system in which sewage flows down along a guideway provided therein when the sewage flows naturally. The present invention relates to an installation structure adopted for installing a naturally flowing vertical pipe that attenuates sewage in a manhole or the like.

[0002]

2. Description of the Related Art In order to attenuate sewage flowing down in a manhole when the sewage flows into the manhole by natural flow, a vertical pipe for sewage is disclosed, for example, in Japanese Patent Application Laid-Open No. Hei 8-41915. (Drop shaft) has been implemented. A guide path is provided inside the vertical pipe for sewage so as to bend so that the sewage does not flow down linearly. The sewage flows down along the guide path, so that the sewage is in an attenuated state. The sewage in the damped state is discharged laterally from the lower end of the vertical sewage pipe and discharged into the manhole. Therefore, there is no possibility that the sewage flowing down will strongly collide with the bottom of the manhole, and the wear of the bottom of the manhole will be suppressed.

[0003] A vertical sewage pipe arranged vertically in a manhole is usually connected to a horizontal inflow pipe arranged horizontally in the upper part of the wall of the manhole. For this reason, when installing the vertical pipe for sewage in a manhole, the height of the lower end of the vertical pipe for sewage is not constant, and it is not easy to fix the lower end of the vertical pipe for sewage in the manhole. There's a problem.

In order to solve such a problem, as shown in FIG. 8, the lower end of the vertical pipe 10 for sewage carried into the manhole 30 is embedded in a concrete invert 34 formed in the manhole 30. That is being done. In this case, a discharge port 14c extending in the horizontal direction is provided below the vertical pipe 10 for sewage.
Is also buried in the concrete invert 34.
Thereby, the lower end of the vertical pipe 10 for sewage whose upper part is connected to the horizontal inflow pipe is stably fixed.

[0005]

However, when the lower end of the vertical sewage pipe 10 is buried in the concrete invert 34 provided in the manhole 30 as described above, the concrete at the lower end of the vertical sewage pipe 10 can be obtained. When the length of the burial in the invert 34 becomes long, the vertical pipe 1
No. 0 has a problem that it is not easy to pull out the vertical pipe 10 for sewage from the concrete invert 34 because it is integrated with the concrete invert 34. Therefore, when the vertical pipe 10 for sewage is replaced due to damage or the like of the vertical pipe 10 for sewage, there is a possibility that the vertical pipe 10 cannot be easily replaced.

The present invention has been made to solve such a problem, and an object of the present invention is to provide a vertical pipe which can be easily pulled out even if the lower end of the vertical pipe such as a vertical pipe for sewage is buried in concrete. To provide an installation structure.

[0007]

According to the first aspect of the present invention, the fluid flowing down inside is attenuated by the guide path provided inside and is discharged to the side of the lower end portion. The lower end of the vertical pipe that is to be buried is buried in concrete, and a vertical pipe installation structure in which a barrier layer is provided between the lower end of the vertical pipe buried in concrete and concrete. is there.

The invention described in claim 2 of the present application (Invention 2)
Is a vertical pipe installation structure according to the first aspect of the present invention, wherein the barrier layer is a sheet or a crushed stone.

The invention described in claim 3 of the present application (the present invention 3)
The lower end of the vertical pipe, in which the fluid flowing down inside is attenuated by the guide path provided inside and is discharged to the side of the lower end, is composed of a plurality of sludge incineration ash processed products. Is a structure for installing a vertical tube supported on an invert formed by stacking blocks formed in a predetermined shape on the bottom surface of a manhole.

[0010]

Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an example of an embodiment of a vertical pipe installation structure of the present invention. The installation structure of this vertical pipe is as follows.
Adopted to place 0 vertically. Manhole 30
The vertical pipe 10 for sewage disposed in the inflow pipe 1
1, the attenuation pipe 12, the connection pipe 13, and the outflow pipe 14 are sequentially joined in the vertical direction.

The inflow pipe 11 arranged at the uppermost part of the vertical pipe 10 for sewage is provided so as to protrude horizontally from the upper part of the inflow pipe main part 11a in a straight cylindrical shape. And a cylindrical inflow-side connection portion 11b. The inflow side connection portion 11b is provided on the wall surface 31 of the manhole 30.
The sewage that is connected to the horizontal inflow pipe 41 that passes through the upper part horizontally and flows through the horizontal inflow pipe 41 is connected to the inflow side connection portion 1
1b, and flows into the inflow pipe main body 11a.

A damping tube 12 provided below the inflow tube 11
Is a straight cylindrical damping tube main body 12a and a hollow shaft 12b arranged along an axis in the damping tube main body 12a.
And a spiral guide path 12c spirally provided between the outer peripheral surface of the hollow shaft 12b and the inner peripheral surface of the damping tube main body 12a. The spiral guide path 12c is connected to the attenuation pipe main body 12
It is provided over the entire length in a.

The damping pipe main body 12a is concentrically joined to the inflow pipe 11 below the inflow pipe main body 11a. The hollow shaft 12b penetrates the entire length of the attenuation pipe main body 12a, protrudes upward from the upper end surface of the attenuation pipe main body 12a, and has a shaft center of the inflow pipe main body 11a of the inflow pipe 11 arranged on the upper side. Part is inserted. Inflow pipe body 1
A hollow shaft 12b passing through the shaft center portion 1a has an inflow pipe 11
Guide plate 12d so as to face the inflow side connection portion 11b of
Is provided. The sewage flowing from the horizontal inflow pipe 41 is guided by the guide plate 12 d and flows down into the attenuation pipe 12.

A connection pipe 13 provided below the attenuation pipe 12
Is formed in a straight cylindrical shape, and is concentrically joined to the lower side of the attenuation pipe main body 12a in the attenuation pipe 12.

Outflow pipe 14 arranged below connecting pipe 13
Is a straight cylindrical outflow pipe main body 14a, and a spiral guide path 14 spirally provided on the inner peripheral surface of the outflow pipe main body 14a.
b. The spiral guide path 14b is provided except for the lower end of the outflow pipe main body 14a, and its axial center is hollow. A discharge port 14c is provided at a lower portion of the outflow pipe main body 14a and above a lower end of the outflow pipe main body 14a so as to horizontally project laterally. The outflow pipe main body 14a is joined concentrically with the upper connection pipe 13. The discharge port 14c is arranged so as to project in a direction opposite to the inflow-side connection portion 11b provided in the upper inflow pipe 11.

The outflow pipe 14 disposed below the vertical pipe 10 for sewage has a lower end below the discharge port 14c supported by a pair of cambers 33 disposed on the bottom surface 32 of the manhole 30. , Are buried in a concrete invert 34 provided in the manhole 30. The lower end of the outflow pipe 14 buried in the concrete invert 34 has a thickness of 10 m constituting a barrier layer with concrete.
m of the foamed rubber sheet 15 is doubly wound around the entire circumference. The foam rubber sheet 15 is fixed by being wound around a wire 16. Further, a foam rubber sheet 15 constituting a barrier layer for concrete is also wound around the discharge port 14c doubly over the entire circumference, and is fixed by being wound around a wire 16. Therefore, the foamed rubber sheet 15 constituting a barrier layer is provided between the lower end of the outflow pipe 14 and the concrete invert 34, and the barrier layer is also provided between the discharge port 14c and the concrete invert 34. Is provided.

The concrete invert 34 has a discharge port 1
4c is made of concrete cast into the manhole 30 so that the lower end is buried. In the concrete invert 34, a groove 34a having a semicircular cross section is formed in a direction orthogonal to the discharge port 14c so as to connect a pair of sewage main pipes connected to the manhole 30 to face each other. The one side edge of the groove 34a is located below the tip of the discharge port 14c.

The vertical pipe 10 for sewage is made of glass fiber reinforced resin mortar (FRPM) to have a diameter of 600 mm except for a discharge port 14c provided in the outflow pipe 14, for example. But caliber 300m
m of polyvinyl chloride (PVC) tubing.

The installation structure of the vertical sewage pipe 10 having such a configuration is constructed as follows. First, as shown in FIG. 2 (a), the vertical pipe 10 for sewage is vertically arranged in the manhole 30, and the lower end of the vertical pipe 10 for sewage is
3 supported. Then, the inflow-side connecting portion 11b of the inflow pipe 11 provided on the upper part of the vertical sewage pipe 10 is connected to the horizontal inflow pipe 41 provided on the wall surface 31 of the manhole 30. In such a state, as shown in FIG. 2 (b), the outflow pipe 14 provided below the vertical pipe 10 for sewage is provided.
A pair of foamed rubber sheets 15 constituting a barrier layer with concrete are wound twice around the lower end of
Is fixed by being wound. Further, a discharge port 14 provided in an outflow pipe 14 below the vertical pipe 10 for sewage.
As for c, a pair of foamed rubber sheets 15 constituting a barrier layer with concrete are wound twice and fixed by being wound around a wire 16.

In this state, concrete is poured into the manhole 30 as shown in FIG. The concrete is supplied to the discharge port 1 provided in the outflow pipe 14.
For example, the lower end of the mandrel 4 is cast from the bottom surface 32 of the manhole 30 to a height of 500 mm so as to be embedded in the concrete. In this case, a groove 34a having a semicircular cross section is formed in the concrete so that a pair of sewage main pipes connected to the manhole 30 are connected to each other, and the concrete invert 34 is formed. When the concrete invert 34 is formed in this manner, the foamed rubber sheet 15 as a barrier layer is provided between the concrete invert 34 and the lower end of the vertical pipe 10 for sewage. Between the lower part of the outlet 14c and the concrete invert 34, a foamed rubber sheet 15 as a barrier layer is provided.

When such a vertical pipe 10 for sewage is replaced with a new vertical pipe 10 for sewage due to breakage or the like, the upper part of the concrete invert 34 is cut and the vertical pipe 1 for sewage is cut.
The foamed rubber sheet 15 as a barrier layer provided at the lower end of the “0” is exposed. Then, the inflow-side connecting portion 11b of the inflow pipe 11 provided on the upper part of the vertical sewage pipe 10 is separated from the horizontal inflow pipe 41 provided on the wall surface 31 of the manhole 30, and the entire vertical sewage pipe 10 is moved upward. Tow. At this time, the lower end of the vertical pipe 10 for sewage buried in the concrete invert 34 and the inverted concrete 34 are blocked by the foamed rubber sheet 15 which is a barrier layer, and the vertical pipe 10 for sewage is connected to the concrete invert 34. Because they are not integrated, the vertical sewage pipe 10 can be easily pulled out of the concrete invert 34.
Then, the vertical pipe 10 for sewage with the foamed rubber sheet 15 wrapped around the lower end as a barrier layer is inserted into an insertion hole formed by pulling out the vertical pipe 10 for sewage in the concrete invert 34. The inflow side connection portion 11 b of the upper inflow pipe 11 is connected to a horizontal inflow pipe 41 provided on the wall surface 31 of the manhole 30. Thereafter, the concrete is filled between the concrete invert 34 and the foamed rubber sheet 15 wound around the lower end of the vertical pipe 10 for sewage. Thereby, a new vertical pipe 10 for sewage is installed in the manhole 30.

FIG. 3 is a cross-sectional view showing another example of the embodiment of the vertical pipe installation structure of the present invention. In this example, the lower end below the discharge port 14c in the vertical sewage pipe 10 is
The crushed stone 17 as a barrier layer is provided between the lower end of the vertical pipe 10 for sewage and the concrete invert 34 buried in the concrete invert 34.

In such an installation structure of the vertical pipe 10 for sewage,
First, as shown in FIGS. 4A and 5A, a concrete invert 30 having a predetermined shape is formed. The concrete invert 34 is, for example, cast from the bottom surface 32 of the manhole 30 to a height of 900 mm, and at a position close to the wall surface 31 of the manhole 30 in which the horizontal inflow pipe 41 is provided, for example, a 1000 mm diameter FRPM product. The inner diameter is 1 so that the lower end of the vertical pipe 10 for sewage is inserted.
A 200 mm insertion hole 34b is provided along the vertical direction. In this case, as shown in FIG. 5A, a groove 34a is formed in the concrete invert 34 so as to connect a pair of sewage main pipes 35 connected to the manhole 30 so as to face each other. You. And the insertion hole 3
A fitting groove portion 34c is provided between the groove 4a and the groove portion 34a so that a lower portion of a discharge port 14c made of PVC with a diameter of 500 mm provided at a lower portion of the vertical pipe 10 for sewage fits.

In such a state, as shown in FIGS. 4 (b) and 5 (b), the vertical sewage pipe 10 is disposed vertically in the manhole 30, and the lower end of the vertical sewage pipe 10 is formed. Is inserted into an insertion hole 34b provided in the concrete invert 34, and a lower part of a discharge port 14c provided in a lower part of the vertical pipe 10 for drainage is fitted to a fitting groove 34c.
Is fitted to. The inflow-side connecting portion 11b provided on the upper part of the vertical pipe 10 for sewage is connected to the wall surface 31 of the manhole 30.
Is connected to a horizontal inflow pipe 41 provided at

Then, as shown in FIG. 3 and FIG. 5 (c), the crushed stone is placed between the lower end of the vertical pipe 10 for sewage inserted into the insertion hole 34b of the concrete invert 34 and the concrete invert 34. 17 are filled. Thereby, the installation structure of the vertical pipe of the present invention in which the crushed stone 17 as the barrier layer is provided between the vertical pipe for sewage 10 and the concrete invert 34 is obtained.

The vertical pipe 10 for sewage installed as described above
Has a bottom end buried in the concrete invert 34 and the concrete invert 3
Since the crushed stone 17 as a barrier layer is provided between 4 and the lower end of the vertical pipe 10 for sewage, the lower end of the vertical pipe 10 for sewage and the concrete invert 34 are not integrated,
When replacing the vertical sewage pipe 10, the vertical sewage pipe 10 can be easily pulled out from the concrete invert 34.

FIGS. 6 (a) to 6 (c) are perspective views showing three types of blocks formed of sludge incineration ash used in the vertical pipe installation structure of the present invention. FIG. 7 is a perspective view showing an invert formed by stacking the three types of blocks shown in FIG. 6 on the bottom surface of a manhole.

The block 35A shown in FIG. 6 (a) is formed in a rectangular shape like a conventional brick. The block 35B shown in FIG. 6B has a groove 351 having a substantially 1/8 circular cross section formed on one side along the longitudinal direction of the rectangular body. The block 35C shown in FIG.
A groove 352 having an arcuate cross section along the longitudinal direction on the upper surface of the rectangular body.
Is formed.

As shown in FIG. 7, the invert is constructed by stacking six blocks A, two blocks B and one block C on a bottom surface of a manhole via a mortar or the like as one unit of a row. Are arranged in series in the longitudinal direction by a plurality of units. A sewage flow path having a semicircular cross section along the longitudinal direction is formed on the upper surface of the invert.

As a method of forming a block made of sludge incineration ash, for example, a method in which water is added to incinerated ash, or a method in which a small amount of cement and water is added to incinerated ash is kneaded. Then, a method of working by pressing or casting is adopted.

[0031]

As described above, the installation structure of the vertical pipe according to the present invention is characterized in that the barrier layer is provided between the lower end of the vertical pipe buried in the concrete and the concrete. There is no possibility that the portion is integrated with the concrete, and it can be easily pulled out when replacing the vertical pipe.

The method for installing a vertical pipe according to the present invention is as follows.
Since the lower end of the vertical pipe is supported on an invert formed by stacking a plurality of types of blocks formed of sludge incineration ash on a bottom surface of the manhole, the vertical pipe There is no danger that the lower end of the pipe will be integrated with the invert, so it can be easily pulled out when exchanging vertical pipes, etc. In addition, it is possible to perform highly accurate construction without skill, and it is an environmentally friendly resource It can be used.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an example of an embodiment of a vertical pipe installation structure of the present invention.

FIGS. 2 (a) to 2 (c) are longitudinal sectional views of manholes, respectively, showing a step of constructing an installation structure of the vertical pipe.

FIG. 3 is a longitudinal sectional view of a manhole showing another example of the embodiment of the installation structure of the vertical pipe of the present invention.

FIGS. 4A and 4B are longitudinal sectional views of manholes, respectively, showing a process of constructing an installation structure of the vertical pipe.

5 (a) to 5 (c) are cross-sectional views of manholes, respectively, showing a process of constructing an installation structure of the vertical pipe.

FIGS. 6 (a) to 6 (c) are perspective views respectively showing blocks formed into three types of processed sludge incineration ash used in the vertical pipe installation structure of the present invention.

FIG. 7 is a perspective view showing an invert formed by stacking the three types of blocks shown in FIG. 6 on the bottom surface of a manhole.

FIG. 8 is a vertical sectional view of a manhole showing an installation structure of a conventional vertical pipe for sewage.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Vertical pipe for sewage 11 Inflow pipe 11a Inflow pipe main part 11b Inflow side connection part 12 Attenuation pipe 12a Attenuation pipe main part 12b Hollow shaft 12c Spiral guideway 13 Connecting pipe 14 Outflow pipe 14a Outflow pipe main part 14b Spiral guideway 14c Spout Outlet 15 Foamed rubber sheet 16 Wire 17 Crushed stone 30 Manhole 31 Wall 32 Bottom 33 Caster 34 Concrete invert 35A, 35B, 35C Block 41 Horizontal inflow pipe

Claims (3)

[Claims] 1. A lower end portion of a vertical pipe in which a fluid flowing down inside is attenuated by a guide path provided inside and is discharged to the side of a lower end portion, is embedded in concrete. A vertical pipe installation structure, wherein a barrier layer is provided between the lower end of the vertical pipe embedded in concrete and the concrete. 2. The vertical pipe installation structure according to claim 1, wherein the barrier layer is a sheet or crushed stone. 3. The lower end of the vertical pipe, in which the fluid flowing down inside is attenuated by the guide passage provided inside and is discharged to the side of the lower end, from the sludge incineration ash processed product. An installation structure of a vertical pipe, wherein a plurality of types of blocks formed in a predetermined shape are supported on an invert formed by stacking on a bottom surface of a manhole.