JPH0285412A - Underdrainage pipe - Google Patents

Abstract

PURPOSE:To enhance durability by providing a recessed portion which becomes narrower toward an inner portion due to a curved portion on a side surface facing one side of a pipe main body and providing a fluid inflow port into the pipe in the longitudinal direction of the pipe main body in a portion located on more inner side than the inlet portion of the recessed portion. CONSTITUTION:Underground water 5 such as rainwater or the like entering from a ground level 1 is guided to a waterproof curved plate 11, 12 of a pipe main body 2 and goes on the lower side of the pipe main body 2 so as to flow in a recessed portion and flow into the pipe from a fluid inflow port 14. Next, after the underground water 5 flows down drain passage portions 15, it flows to the end portions of the pipe, and it is taken out from the underground to required drain places.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a culvert drainage pipe buried in, for example, a bunker of a golf course, underground of a fairway, in a wetland, etc., for draining rainwater.

[Conventional technology]

A conventional underdrain drain pipe is shown in Figure 6. This is used for golf course bunkers, fairways, and wetlands (1).The culvert drainage pipe main body (2) is formed into a cylindrical shape with a mesh (3) surface by extrusion molding. Main body (2
) is buried in a bunker (1) made of earth and sand (4), etc.
It is used for drainage as a so-called run-of-river type.

[Problem to be solved by the invention]

Since the above-mentioned conventional culvert drainage pipe is a run-in type, rainwater (5) follows a straight path as shown by the wavy line in the figure.

Therefore, if the mesh (3) is made finer, it will become clogged, and if the mesh (3) is made larger, the earth and sand (4) will be trapped in the underdrain drainage pipe (
2) As time passes, the drainage becomes extremely difficult to drain, resulting in a decrease in drainage capacity.Furthermore, roots of plants, etc. may enter the mesh (3) and obstruct drainage.

For this reason, there is a technique to change the shape of the mesh (3), but in this case as well, the earth and sand (4) that fit the shape of the mesh (3) become blocked, making it difficult to drain water.

Furthermore, the lower end of the culvert drainage pipe main body (2) has a curved shape toward the -F side where earth and sand (4) tends to accumulate, and rainwater (5) flows in contact with the mesh (3) at the lower end, so - Sediment (4) tends to accumulate in the water passage hole (14), and once it accumulates inside the main body, the drainage capacity decreases rapidly.

Further, although there are ancillary facilities to prevent dirt (4) from entering the main body, there is a problem that it requires a very large amount of cost.

In view of the above-mentioned problems, the present invention aims to provide an underdrain drain pipe that can drain water smoothly even when used for a long period of time and can reduce costs.

[Means to solve the problem]

The problem solving means of the present invention is that a culvert drainage pipe main body (2) buried in earth and sand (4) of a golf course, wetland, etc.
A water-impermeable upper plate (11) that receives the Tonosho (P) from the side;
It is formed into a cylindrical shape with a water-impermeable side plate (12) that receives the tonosho (1) from the side and a water-permeable lower plate (13) that receives the tonosho (P) from below, and the lower plate (13) is A perforated curved part (I6) is formed which is curved toward the plate (11) side (upper side) and has a rainwater drainage hole (14), and a water-impermeable part is formed on both sides and below of the perforated curved part (16). U-shaped drainage section (15), (1
5) are integrally formed.

[For production]

In the above solution, when it rains, rainwater (5) enters between the earth and sand (4). Since the culvert drainage pipe main body (2) has water holes (14) formed only in the lower plate (13), the rainwater (5) that has entered the earth and sand (4) will flow as shown by the wavy line in the figure. It becomes a course, and the water passage hole (1
4), the water passage hole (14) acts as a spring, and enters the drain pipe body (2) like spring water.

However, even if the water hole (14) becomes a spring and the rainwater (5) enters the underdrain pipe main body (2), the earth and sand (4) will be trapped under the perforated curved part (16). It is in a state like a lump of earth and sand along a curved surface, and this earth and sand (4) is the main body (
2) It is difficult to penetrate inside. Therefore, the water passage holes (14) are hardly ever blocked by earth and sand (4), and drainage is performed smoothly even during long-term use. Temporarily earth and sand (4
) enters the underdrain main body (2), the perforated curved part (16) and the impermeable U-shaped drainage part (15) are separate, so rainwater will not flow into the U-shaped drainage part (15). It does not flow by involving surrounding earth and sand (4), and the water flow hole (14)
It is hard to get clogged, and the drainage capacity hardly decreases.

〔Example〕

Hereinafter, embodiments of the underdrain drainage pipe of the present invention will be described based on the sectional view of the buried state shown in FIG. 1 and the single sectional view shown in FIG. 2.

As shown in the figure, the underdrain drain pipe according to the embodiment of the present invention has a water-impermeable structure in which the underdrain main body (2), which is buried in the earth and sand (4) of the bunker (1), is subjected to earth pressure (P) from above. It is formed into a cylindrical shape from an upper plate (11), a water-impermeable side plate (12) that receives earth pressure (P) from the side, and a water-permeable lower plate (13) that receives earth pressure (P) from below, The lower plate (13) is curved toward the upper plate (11), and the lower plate (13)
A rainwater passage hole (14) is formed toward the inside of the culvert drainage pipe main body (2).

As shown in FIG. 2, the upper plate (11) is curved in an arc shape, and the side plates (12) have almost the same curvature as the upper plate (11) at both ends of the upper plate (11). It is connected in series.

The lower plate (13) includes a U-shaped drainage part (15) which is connected to the lower end of the side plate (12) and is curved into a U-shape.
, (15), and both U-shaped drainage parts (15), (1
a perforated curved portion (1) which is connected between
6). That is, the lower plate (13
) has a central perforated curved part (16) and a perforated curved part (1
6) Water-impermeable U-shaped drainage parts (
15), (15) are formed in a wavy shape, and the U-shaped drainage part (15), (15) is connected to the perforated curved part (receptacle).
It is placed lower.

The underdrain drain pipe main body (2) is integrally formed from synthetic resin or the like into a generally hollow U-shaped cylinder.

In the above configuration, first, the entire pipe is tilted in the drainage direction with the lower plate (13) of the underdrain pipe main body (2) facing downward, and buried at an appropriate depth.

When it rains, rainwater (5) enters between the earth and sand (4). Since water holes (14) are formed only in the lower plate (13) of the culvert drainage pipe body (2), rainwater (5) that has entered the earth and sand (4) is shown by the dotted line in Figure 1. It passes through the water hole (14) from the bottom of the lower plate (13), and the water hole (14) becomes a spring, flowing into the culvert drainage pipe body (2) as if it were a spring. to invade.

However, even if the water hole (14) becomes a spring and rainwater (5) enters the underdrain pipe main body (2), the earth and sand (4) will remain under the perforated curved part (16), making it appear as though it is curved. It is like a ring of sediment along the surface, and this sediment (4) is the main body (2).
) is difficult to penetrate inside. Therefore, the water hole (14)
There is almost no chance of blockage, and tJII water can be applied smoothly even during long-term use.

Even if earth and sand (4) invades, the perforated curved part (16)
) and the lJ-shaped drainage sections (15), (15) are separate, so rainwater flows into the U-shaped drainage sections (15), (15).
It does not flow along with surrounding earth and sand (4), the water holes (14) are not easily clogged, and the drainage capacity is hardly reduced.

The configuration of the present invention is not limited to the above embodiments, and the cross-sectional size of the underdrain pipe body (2), the shape, diameter, and number of water holes (14) can be changed as appropriate. Set.

Furthermore, the cross-sectional shape is not limited to the above example (
, as shown in FIG. 3 or FIG. 4. That is, in FIG. 3, the upper plate (11) and the side plates (12) are not arcuate but planar.

In the one shown in FIG. 4, the perforated curved portion (16) is formed by bending. Further, as shown in FIG. 5, a plurality of perforated curved portions (16) may be provided on the lower plate (13). In either configuration, the same effects as in the above embodiment can be achieved.

〔Effect of the invention〕

As is clear from the above description, according to the present invention, a water-permeable lower plate is formed on the underdrain drain pipe body buried in earth and sand, the lower plate is curved toward the upper plate side, and the drain pipe body is A large number of rainwater holes are formed towards the inside of the water hole, and the perforated curved part and the U-shaped drainage part are separate, so even if the water hole becomes a spring outlet, there is no possibility that earth and sand will block the water hole. It won't get lost,
Drainage can be carried out smoothly even after long-term use, and there is almost no decrease in drainage capacity.

In addition, because of its good water collection capacity, it can be easily buried at a shallow depth below the ground surface, and most of the ancillary facilities associated with burying the main body of the culvert drainage pipe can be omitted, resulting in significant cost reductions.

[Brief Description of the Drawings] Fig. 1 is a sectional view of an underground drain pipe in a buried state showing an embodiment of the present invention, Fig. 2 is a sectional view of the same, and Figs. 3 to 5 show other embodiments. FIG. 6 is a sectional view of a conventional underdrain drain pipe in a buried state. (2)・・・・Underdrain drain pipe body, (4)・・・・
... Sediment, (11) ... Water impermeable upper plate, (12
)...Water-impermeable side plate, (13)...Water-permeable lower plate, (14)...Water hole, (P)...
...Earth pressure.

Claims (1)

[Claims] The main body of the culvert drain pipe buried in earth and sand is constructed of an impervious upper plate that receives earth pressure from above, an impermeable side plate that receives earth pressure from the sides, and a permeable lower plate that receives earth pressure from below. What is claimed is: 1. A culvert drainage pipe, characterized in that the lower plate is curved toward the upper plate, and a rainwater passage hole is formed in the lower plate toward the inside of the culvert drainage pipe body.