JPH0525964B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION (Field of Industrial Application) The present invention relates to the structure of a connection part of an underdrain collection and drainage pipe.

(Prior art) An example of a conventional construction method for connecting culvert collection and drainage pipes, in which a gutter-like waterway with a drainage collection function extending in the axial direction is provided on the outer surface of a drainage channel member with a required covering thickness. For example, as shown in FIG. 21, the drainage channel members a and b are connected to each other using a connecting pipe c, and the connecting portion f of the trough-like channels d and e is connected to each other using a connecting pipe body c.
It has been proposed that the outer surface of the tape be covered with adhesive tape g.

(Problems to be Solved by the Invention) When using the above construction method, water in the drainage channel member a on the upstream side flows into the drainage channel member b on the downstream side. However, it is hardly expected that the water in the gutter-like waterway d on the upstream side will flow into the drainage channel member b on the downstream side.
The water collected in the gutter-like waterway d on the upstream side often flows into the gutter-like waterway e on the downstream side, overflowing the gutter-like waterway e and flowing into the ground. There was a problem in that the drainage performance of the blind drainage channel as a whole, which was constructed by sequentially connecting culvert collection and drainage pipes, was not effectively demonstrated.

Furthermore, when water flows from the upstream culvert collection pipe into the downstream culvert collection/drainage pipe, the earth and sand discharged from the upstream culvert collection/drainage pipe also flows directly into the downstream side. As a result, much of the inflowing soil particles settle at the bottom of the underdrain collection and drainage pipe on the downstream side, and as the amount of sediment gradually increases, the water channel inside the underdrain collection and drainage pipe becomes narrower, reducing drainage efficiency. I had a problem. As sedimentation progresses further and the waterway becomes clogged, the underdrain collection and drainage pipe no longer fulfills its original function of collecting and draining ground water. As described above, the occurrence of a phenomenon in which the earth and sand discharged from the upstream culvert collection and drainage pipes flow directly downstream causes a decline in the performance of the culvert collection and drainage equipment and shortens its lifespan. Therefore, there was a lot of room for improvement.

The present invention can solve such problems, can extend the life of the underdrain collection and drainage equipment, and does not significantly increase construction costs.
The purpose is to provide a structure for the connection part of an underdrain collection/drainage pipe.

(Means for Solving the Problems) The structure of the connection part of the underdrain collection and drainage pipe according to the present invention (hereinafter referred to as structure) has an outer surface part 8 of the drainage channel member 6.
When connecting the underdrain collection and drainage pipes in which the trough-like waterway 9 with the collection and drainage function extending in the axial direction is provided with the required coating thickness, the downstream underdrain collection and drainage pipe 1
The upper end portion 1b1 of b is inserted into the cylindrical tube 34 from one end thereof, and the upstream end of the cavity 60 formed between the outer surface portion 8 of the drainage channel member 6 and the inner surface portion 34a of the cylindrical tube 34. at least the lower half of the side opening,
The cylindrical pipe is closed with a partition 35 which is curved in the circumferential direction and has a radial thickness set to be thicker than the covering thickness of the trough-like waterway 9, and the lower end portion 1a1 of the upstream culvert collection and drainage pipe 1a is The drainage channel member 6a constituting the upstream culvert collection and drainage pipe 1a is inserted into the cylindrical pipe 34 from the other end so that it is raised above the bottom surface of the cylindrical pipe 34, and the upstream culvert collection and drainage pipe 1a is inserted into the cylindrical pipe 34 from the other end. 1a
This is characterized in that a cavity 43 is formed between the lower end of the partition 35 and the partition 35.

The partition 35 is preferably formed by curving a water-blocking band material into an arcuate shape, which has a band-like shape and whose radial thickness is set to be thicker than the coating thickness of the trough-like waterway 9.

In addition, the above-mentioned "blocking at least the lower half of the opening on the upstream end side of the air 60 with the partition 35" means the lower end 4 of the drainage channel member 6a of the upstream culvert collection and drainage pipe 1a.
5 and the lower end 46 of the trough-like waterway 9 can flow almost directly into the drainage channel member 6b of the downstream culvert collection and drainage pipe 1bb. This means closing the opening with the partition 35.

(Function) However, at the connection part A of the underdrain collection and drainage pipe,
Since at least the lower half of the opening on the upstream end side of the air 60 is blocked by the partition 35, the water flowing out from the lower end 45 of the drainage channel member 6a of the upstream culvert collection/drainage pipe 1a, as well as the trough-like waterway, is blocked by the partition 35. The water flowing out from the lower end 46 of the drain pipe 9 flows almost directly into the drainage channel member 6b of the downstream underdrain collection and drainage pipe 1b.

Furthermore, when water flows from the upstream culvert collection/drainage pipe 1a into the downstream culvert collection/drainage pipe 1b, the water is dammed up by the partition 35, so the bottom portion 43a of the empty chamber 43 becomes a sedimentation area. Therefore, the soil grains and sand discharged from the upstream underdrain collection and drainage pipe 1a settle in this sedimentation part, and are separated and captured.
Clean water with less dirt and sand will flow downstream.

(Example) Examples of the present invention will be described below based on the drawings.

First Embodiment In FIGS. 1 to 4, the structure of the present invention connects the lower end 44 of the upstream culvert collection and drainage pipe 1a to the upper end 44 of the drainage channel member of the downstream culvert collection and drainage pipe 1b via the connecting member 3.
This is a continuation of 8.

The upstream culvert collection/drainage pipe 1a and the downstream culvert collection/drainage pipe 1b both have the same configuration, and the outer surface 8 of the drainage channel member 6 having the inflow opening 5 for water inflow is connected to the mesh filter material 7. (Mesh filter material 7
may be omitted), and is covered with a trough-like mat 10 forming a trough-like waterway 9.

The drainage channel member 6 is, for example, in the shape of a circular pipe with a smooth outer circumferential surface, and the outer surface 8 has circular inflow openings 5 for water inflow at required intervals in an upwardly deviated state. , 5 are provided facing each other.

In this embodiment, the trough-like mat 10 is
As shown in FIG. 5, a gutter-like body 1 for forming a gutter-like waterway 9 extending in the axial direction of the drainage channel member 6.
1 are successively connected in a loosely fitted manner, and the front and back surfaces thereof are covered with a net-like filter material 7. The gutter-like body 11 is an integrally molded product entirely made of synthetic resin, and as shown in FIG. 6, by winding both ends of the central wall 12 in opposite directions, two adjacent empty chambers 14 that become water channels are formed. , 15, and an opening 16 serving as a water inlet between the rolled end and the central wall 12,
The central wall 1 mainly consists of an S-shaped gutter in cross section.
2 is provided with protrusions 17, 17 that protrude on both sides between both winding ends, and a locking protrusion 19 and a locking line that can engage with each other are provided on the outer surfaces of the empty chambers 14, 15. The groove 20 is provided so as to protrude in the opposite direction.
The locking protrusion 19 has a substantially T-shaped cross section with locking portions 22, 22 swollen on both sides of the tip of the protrusion 21. In addition, the locking groove 20 has a groove 25 into which the distal end portion 23 of the locking protrusion 19 can be fitted with a margin, by a pair of opposing protruding pieces 26, and each of the protruding pieces At the tip of 26, 26,
Semicircularly curved locking pieces 27, 27 that can engage with the locking portions 22, 22 are arranged in a row so as to face each other. Further, the protruding length of the locking protrusion 19 is set to be slightly larger than the groove depth of the locking groove 20.
As shown in FIG. 7, when the distal end portion 23 of the locking protrusion 19 is loosely inserted into the locking groove 20 against the elastic action of the protruding pieces 26, 26, for example, the locking portion 22 Due to the engagement of the locking piece 27 with the locking protrusion 19, the locking protrusion 19 cannot be separated from the locking groove 20, whereby the gutter-shaped bodies 11, 11 are connected to each other. The connected gutter-like body can be bent within a certain range due to the play in the connecting part 29, and the gap formed in the connecting part 29 actively allows ground water to flow in and pass through. This becomes the water inflow section 28. The gutter-like body 11 having such a configuration is set to have a length substantially equal to the entire length of the drainage channel member 6, and is sequentially connected and integrated in the above-described manner to extend the outer part 2a of the drainage channel member 6. It is a coverable trough-like mat 10 (see FIG. 5). In order to prevent the trough-shaped mat 10 from losing its shape, it is preferable to connect the trough-shaped bodies to each other using adhesive tape (not shown). And the trough-like body pine 10 formed in this way
For example, the gutter mat 10 covered with the mesh filter material 7 is placed in the outer surface 8 of the drainage channel member 6 (see FIG. 5).
, except for the lower part 30 (see Fig. 4), a gutter-like waterway 9 with a water collection function extending in the axial direction is formed on the outer surface 8 of the drainage channel member 6, thereby forming the required structure. Underdrain collection and drainage pipes 1a and 1b will be constructed.

Ground water is efficiently collected and drained by the underdrain collection and drainage pipes 1a and 1b. A more specific explanation of this is as follows. That is, the water collecting action includes an active water collecting action through the water inflow portion 28 between the connecting portions of the trough-like mat 10 and a water collecting action through the water flowing through the water inlet 31 between the trough-like mat 10 and the drainage channel member 6. There are two modes of active water collection. Note that the latter water collecting action is performed by the trough-like mat 10 and the drainage channel member 6.
The ground water at the lower end 32 between the lower end 32 is raised and collected from the linear water intake section as the lower end 32 through the gap 31 in which a mesh filter material 7 is interposed as necessary. Therefore, the lower the lower end portion 32 is located, the lower the linear water intake portion will be, and the water collection performance will be improved accordingly.

The collected ground water then flows into the filter water passage section 33 between the outer surface 8 of the drainage channel member 6 and the mesh filter material 7 or between the outer surface of the gutter-like body 11 and the mesh filter material 7. and move in the circumferential direction,
In addition, the ground water flows through the gutter-like waterway 9 and moves in the axial direction of the underdrain collection and drainage pipe 1, and due to the combined phenomenon of water movement in the circumferential direction and the axial direction, the ground water freely changes the flow direction and moves. It flows into the drain channel member 6 from the inflow opening 5, flows smoothly within the drain channel member 6, and is discharged at its end.

Here, the filter action in the underdrain collection and drainage pipe 1 will be briefly described. First, when water is collected through the water inflow part 28 of the trough-like pine 10, the soil grains and sand contained in the ground water are separated and captured in the water inflow part 28, and after the separation and capture. The water is subjected to multiple filter actions, such as being separated and captured in the filter water passage section 33, or being sedimented and separated and captured in the trough-like waterway 9 of the trough-like body 11. In addition, when water is collected between the trough-like mat 10 and the drainage channel member 6, the soil grains and sand in the ground water are separated and captured in the filter water passage section 33.

The connecting member 3 is formed by expanding a partition 35 at the inner middle part of a cylindrical pipe 34 into which the upstream underdrain collection and drainage pipe 1a and the downstream underdrain collection and drainage pipe 1b can be inserted from both sides. The partition 35 has, for example, its upper end 3
6 and 36 are curved in a U-shape so that they are located at approximately the same height as the inflow openings 5 of the underdrain collection and drainage pipes 1a and 1b, and the upper end of the downstream side drainage channel member 6b is located at the downstream side surface 37. It abuts against the edge 39. Therefore, the downstream side surface 37 is the outer surface portion 8 of the drainage channel member 6.
Since the opening on the upstream end side of the cavity 60 formed between the inner surface 34a of the cylindrical pipe 34 and the inner surface 34a of the cylindrical tube 34 is closed, the upper end 40 of the trough-like waterway 9 is in a closed state. Note that the partition 35 is formed, for example, by pasting a band 41 made of sponge-like rubber to a required part inside the cylindrical pipe 34, and also connects the lower end of the upstream culvert collection and drainage pipe 1a with the partition 35. A vacant chamber 43 is formed between them (see FIG. 1). Furthermore, partition 35
may be formed into an annular shape by connecting their upper ends to each other.

However, almost all of the water collected in the upstream culvert collection and drainage pipe 1a and flowing out from its lower end 44, that is, the lower end 45 of the upstream drainage channel member 6a
Almost all of the water flowing out from the lower end 46 of the trough 11 (i.e. the trough 9) forming the trough mat 10 flows into the cavity 43 in the connecting member 3. . Then, the empty space 43
Since the opening at the upstream end of the drain 60 is closed by the partition 35 as described above (see Fig. 1), the water flowing into the drain channel member 6b almost directly flows into the downstream drain channel member 6b. becomes. In addition, the upstream culvert collection and drainage pipe 1a and the downstream culvert collection and drainage pipe 1
In order to improve the stability of
As shown in the figure, a pedestal piece 47 that supports the lower portion 30 of the drainage channel members 6a, 6b in the underdrain collection/drainage pipes 1a, 1b is preferably attached to the inner lower end of the cylindrical pipe 34.

Figures 8 and 9 relate to a structure attached to a connection member for an underdrain collection and drainage pipe, which is combined with the structure of the above embodiment. The attached structure uses a rectangular box-shaped concrete pit 24 that is open at the top and whose opening 48 can be closed by a lid plate 49, and has a through hole 51 provided in a side wall 50 on the upstream side. The lower end portion 52 of the underdrain collection and drainage pipe 1a is inserted, and the downstream underdrain collection and drainage pipe 1b is inserted into the through hole 55 (provided at a slightly lower position than the through hole 51) provided in the downstream side wall 53. By inserting the upper end portion 56 of the drainage channel member 6b, the lower end portion 44 of the upstream culvert collection and drainage pipe 1a is connected to the drainage channel member 6 of the downstream culvert collection and drainage pipe 1b.
It is connected to the upper end 38 of b. With this attached structure, the bottom portion 57 of the connecting member 3 can function as a sedimentation tank, and the sediment can be easily removed by removing the lid plate 49.

An example of constructing a blind drainage structure using the attached structure will be explained based on FIG. 10. In the same figure,
In the middle of the connecting member A1 formed by applying the attached structure,
Connection part A2 formed by applying the structure according to the above embodiment
It becomes by arranging multiple of. When constructed in this way, the cell 24 related to the attached structure is arranged so that both ends 59, 59 of the belt-shaped cleaning brush 58 inserted into each drainage channel member 6 are moved in the direction of the arrow F, as shown by the dashed line in FIG. It can also function as a cleaning opening for reciprocating operation.

Other Embodiments In the structure of the present invention, if the drainage channel member has an inflow opening for water inflow, the shape of the inflow opening allows the drainage function of the underdrain collection and drainage pipe to be exerted without any hindrance. As far as possible, it is not limited to what is shown in the above embodiments, but is arbitrary. When the drainage channel member has an inflow opening for water inflow, it is preferable that the inflow opening be located as high as possible so that the amount of water discharged in the drainage channel member can be maximized.

Further, in the structure of the present invention, there are cases where the drainage channel member does not have an inflow opening for water inflow.

Furthermore, the form of the gutter-like waterway 9 is not limited to that shown in the above embodiments, as long as it is a gutter-like waterway that extends in the axial direction of the drainage channel member and has a water collecting function. It can also be formed using the gutter-like bodies 11 shown in FIGS. 11 to 15, and the gutter-like bodies may be connected and integrated using join tape. In addition, 11th to 1st
In FIG. 5, the mesh filter material and the drainage channel member are given the same reference numerals as those shown in the previous embodiment. The trough-like waterway 9 can also be formed as a waterway extending substantially in the axial direction of the drainage channel member 6, as shown in FIGS. 16-20.

(Effect of the invention) The present invention has the following excellent effects.

In the structure of the present invention, the lower end of the upstream culvert collection and drainage pipe is connected to the upper end of the drainage channel member of the downstream culvert collection and drainage pipe, so that water is collected in the upstream culvert collection and drainage pipe, and the lower end thereof The water flowing out from the lower end of the drainage channel member and the lower end of the trough-like waterway can be allowed to flow almost directly into the drainage channel member of the downstream culvert collection and drainage pipe.

Therefore, according to the present invention, there is no inconvenience caused by the water collected in the gutter-like waterway on the upstream side flowing out into the ground, unlike when the conventional connection structure described above is adopted. ,
To make the drainage efficiency of the blind drainage channel as a whole extremely excellent, and to enable prompt collection and drainage of ground water.

In the structure of the present invention, when water flows from the upstream culvert collection pipe to the downstream culvert collection/drainage pipe, the water is dammed up by the partition, so the bottom part of the empty space becomes a settling part. Therefore, the soil grains and sand discharged from the upstream underdrain collection and drainage pipe settle in this settling section and are separated and separated.
The water will be captured and clean water with less dirt and sand will flow downstream.

For this reason, clogging in the underdrain collection and drainage pipe is prevented as much as possible, and the life of the underdrain collection and drainage equipment can be extended for a longer period of time.

The structure of the present invention connects underdrain collection and drainage pipes to each other using a connecting member having a simple structure in which a partition is provided at the inner middle part of a cylindrical pipe. Therefore,
The structure of the present invention can be constructed using readily available commercially available cylindrical tubes and band materials such as sponge-like rubber, and therefore the connection structure is simpler than when using a concrete box as shown in FIGS. 8 and 9. It can be expected to simplify and reduce construction costs.

[Brief explanation of the drawing]

1 and 2 are cross-sectional views showing one embodiment of the present invention,
Figure 3 is its perspective view, Figure 4 is its exploded perspective view,
FIG. 5 is a perspective view showing a trough-like body mat covered with a mesh filter material, FIG. 6 is a perspective view showing a trough-like body,
FIG. 7 is a side view showing how the trough-like bodies are connected to each other, FIG. 8 is a cross-sectional view showing the attached structure combined with the structure of the present invention, FIG. 9 is an exploded perspective view thereof, and FIG. 10 is the structure of the present invention. A plan view showing a blind drainage channel constructed using the structure and attached structures; FIGS. 11-15 are cross-sectional views showing other examples of trough-like bodies constituting the trough-like waterway together with their connection states; FIGS. 16-20 FIG. 21 is a perspective view showing another example of a trough-like waterway, and FIG. 21 is a partially cutaway perspective view illustrating a conventional structure of an underdrain collection/drainage pipe connection section. 1a...Upstream culvert collection and drainage pipe, 1a1...Lower end side portion, 1b...Downstream culvert collection and drainage pipe, 1b1...Upper end side portion, 6...Drainage channel member, 6a...Downstream drainage channel member, 8...Drainage channel member External surface portion, 9...Gutter-like waterway, 3
4... Cylindrical tube, 34a... Inner surface of cylindrical tube, 35
...Partition, 38...Upper end of downstream culvert collection and drainage pipe, 4
3... Vacancy, 44... Lower end of upstream culvert collection and drainage pipe, 6
0...Empty.

Claims (1)

[Scope of Claims] 1. A gutter-like waterway 9 having a drainage collection function extending in the axial direction is provided on the outer surface 8 of the drainage channel member 6 and has a required coating thickness to connect the underdrain collection and drainage pipes to each other. At this time, the upper end portion 1b1 of the downstream underdrain collection and drainage pipe 1b is inserted into the cylindrical pipe 34 from one end, and the outer surface part 8 of the drainage channel member 6 and the inner surface part 34 of the cylindrical pipe 34 are inserted.
At least the lower half of the opening on the upstream end side of the air 60 formed between the cylindrical pipe and the cylindrical pipe is curved in the circumferential direction of the cylindrical pipe, and the thickness in the radial direction is set to be thicker than the coating thickness of the gutter-like waterway 9. The lower end portion 1a1 of the upstream culvert collection and drainage pipe 1a is closed by the partition 35
is inserted into the cylindrical pipe 34 from the other end so that the drainage channel member 6a constituting the upstream underdrain collection/drainage pipe 1a is raised above the bottom surface of the cylindrical pipe 34, and A structure of a connecting part of an underdrain collection and drainage pipe, characterized in that a cavity 43 is formed between the lower end of the collection and drainage pipe 1a and the partition 35. 2. The partition 35 is formed by curving a water-shielding band material into an arc shape, and the thickness in the radial direction is set to be thicker than the covering thickness of the gutter-like waterway 9. Structure of the connection part of the underdrain collection/drainage pipe described in Section 1.