JPH0219245B2 - - Google Patents

Description

[Detailed Description of the Invention] (Industrial Application Field) The present invention makes it possible to efficiently collect and drain ground water for many years by winding a winding member around the peripheral surface of a drainage pipe. This invention relates to an underdrain collection and drainage pipe that is both strong and strong.

(Conventional technology and its problems) Conventional blind drainage construction methods for the ground include a method in which the ground is replaced with chestnut stone or gravel and a drainage space is formed between the chestnut stones, or a method made of synthetic resin or concrete with a through hole. There are construction methods such as burying pipes underground to perform blind drainage from the ground.

However, with the former method, there was a problem in that the gaps between the stones and the like were clogged quickly, making it difficult to ensure the permanence of the collection and drainage. On the other hand, in the latter method, since the pipe itself needs to function as a drainage pipe, the hole is drilled at a height of approximately 1/3 of the bottom of the pipe, as shown in Figure 10. It has no choice but to be the upper part b excluding the part a. Therefore, there is a restriction on the number of holes that can be drilled, and water can only be collected in the area where the holes c exist, so the water collection area is small and water cannot be collected at the bottom of the pipe, making it difficult to collect water. There was a problem that was difficult to resolve. Furthermore, since the water level inside the pipe is limited to a low level of about one-third of the bottom of the pipe (compare the water levels shown in Figures 5 and 10), drainage efficiency was not good. Furthermore, if the through hole c is clogged, it becomes completely impossible to collect water in the clogged area, and when the pipe is buried in the soil, it may be crushed and the waterway may be blocked. There were also deficiencies in the permanence of water collection and drainage.

The object of the present invention is to provide an underdrain collection/drainage pipe with a novel configuration that can solve these problems.

(Means for Solving the Problems) The underdrain collection and drainage pipe 1 according to the present invention includes a drainage pipe 2 having an opening 6 for water inflow on the peripheral surface 3, and legs on both longitudinal sides of the base plate 7. It consists of a winding member 5 for collecting water in the form of a belt, with portions 9 and 10 facing each other. The spiral waterway 13 is formed between the substrate 7 and the peripheral surface part 3 by winding it in a spiral manner so as to protrude toward the surface part 3, and the wound side edge parts 15,1
6 has a water collection gap 19 communicating with the spiral waterway 13.
It is characterized by the formation of

Note that unless water is completely sealed, water can easily enter through the contact parts of the contact members.
The "water collection gap 19" in the present invention is a concept that includes such a contact portion. In addition, the dimensions of the drain pipe, the size and shape of the opening, the location where it is provided, etc. are set as appropriate depending on the ground condition and the required amount of collected water.

(Function) When the underdrain collection and drainage pipe 1 according to the present invention is arranged in the excavated trench 26 with the required water gradient and buried in the soil, the ground water is Water flows into the spiral waterway 13 from the water collection gap 19, flows through the spiral waterway 13, flows into the drain pipe 2 through the opening 6, flows smoothly through the drain pipe 2, and is discharged at its end. Note that since the water collection gap 19 is formed continuously in a spiral shape along the peripheral surface 3 of the drain pipe 2, the length of the water collection gap 19 is extremely long, and all of the water collection gaps 19 have sufficient water collection capacity. have the ability. Therefore, even if a part of the channel is clogged, the ground water in the clogged section will flow into the spiral waterway 13 from the water collection gap existing in the vicinity of the clogged section. In addition, since the spiral waterway 13 is provided so as to cover the peripheral surface 3 of the drain pipe 2, even if a part of the water inflow opening 6 provided in the peripheral surface 3 becomes clogged, the spiral waterway 13 The water in the water channel 13 flows freely within the spiral water channel 13, and
Passing through the adjacent water collection gaps 19, 19, the peripheral surface portion 3
Since it can also flow in the lengthwise direction, it flows into the drain pipe 2 through the opening 6 located downstream of the clogged opening, flows smoothly through the drain pipe 2, and is discharged at its end.

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

In Figs. 1 to 4, an underdrain collection and drainage pipe 1 of the present invention
In this example, a winding member 5 is spirally wound around a peripheral surface 3 of a drain pipe 2.

The drain pipe 2 is formed by, for example, a circular pipe made of synthetic resin, with openings 6 as circular holes having a relatively large diameter provided at required intervals on opposing parts of the peripheral surface thereof, and set to have a unit length.

The winding member 5 has a band-like shape in which leg portions 9 and 10 as projecting pieces are provided facing each other on both longitudinal side edges of a substrate 7 as a band-like flat plate body, and is formed, for example, as a synthetic resin extrusion molded body. . In this embodiment, a first flange piece 11 is provided on one side edge of the substrate 7 in an eave-like manner, and a leg portion (protruding piece) 10 provided on the other side edge side is provided approximately in the longitudinal direction. A second flange piece 12 extending parallel to the substrate 7 is protruded from the center portion, and the second flange piece 12 is formed to be slightly longer than the first flange piece 11. As shown in FIG. 2, the winding member 5 having such a configuration has both legs 9,
10 is spirally wound so as to protrude toward the peripheral surface 3 of the drain pipe 2. In this embodiment, the first collar piece 11 is located outside the second collar piece 12. For example, immediately after extrusion molding, the collar pieces 11 and 12 are spirally wound in a relatively soft stage so as to overlap each other. As a result, a spiral waterway 13 is formed between the substrate 7 and the peripheral surface portion 3, and a curved flow path 17 is formed at the connection portion between the adjacent winding side edge portions 15 and 16. 17, in the winding side edge portions 15 and 16,
A water collection gap 19 (shown in the drawings as a gap between the legs 9, 10 and the peripheral surface 3) is provided so as to communicate with the spiral waterway 13.
The first flange piece 11 also functions to prevent the second flange piece 12 from coming off, making the entire wound portion stable.

In addition, if the winding member 5 unwinds and is inconvenient, it should be noted that at both ends of the underdrain collection and drainage pipe 1,
For example, as shown in FIGS. 1 and 2, a cap 20 for preventing unwinding is attached. The cap 20 is formed by continuously integrating an outer cylinder part 22 that covers the end portion 21 of the winding part and an inner cylinder part 25 that comes into contact with the inner circumferential surface part 23 of the drain pipe 2 at their proximal end. The end portion 21 of the winding portion is clamped between the portion 22 and the inner cylinder portion 25 to prevent the winding member 5 from unwinding.

Next, an example of how to perform blind drainage construction using the underdrain collection and drainage pipe 1 according to the present invention will be explained, and the operation of the underdrain collection and drainage pipe 1 according to this embodiment will be explained.

That is, as shown in Fig. 4, the underdrain collection and drainage pipe 1
are arranged in the excavated trench 26 at a required water gradient in a state in which they are sequentially connected. Note that the underdrain collection and drainage pipes 1 and 1 are connected to each other using a connecting pipe body 27 shown in FIG. 1, for example, as shown in FIGS. 3 and 4.
At that time, the outside of the culvert collection and drainage pipe 1 should be covered with gravel, cobblestones, etc.
It is surrounded by a filter 29 made of filter material such as sand or rice husk, and then the underdrain collection and drainage pipe 1 and the filter 29 are buried in the soil.

Therefore, ground water flows into the spiral waterway 13 from the water collection gap 19 through the bent flow path 17 . At this time, the bent channel 17 also functions as a filter, and prevents minute particles such as sand and soil particles from reaching the water collection gap 19 as much as possible. The water that has entered the spiral waterway 13 flows through the spiral waterway 13, flows into the drain pipe 2 from the opening 6 (see Figure 5), flows smoothly through the drain pipe 2, and is discharged at its end. be done.

Other Embodiments Figures 6 and 7 show other examples of drain pipes, both of which have a cylindrical shape. Drain pipe 2 shown in Figure 6
An arcuate plate portion 32 is provided at the tip of each branch piece 31, 31, 31 of a long partition member 30 having a Y-shaped cross section.
32, 32 are integrally provided, and a gutter portion 35, which communicates with each of the openings 33, 33, 33 extending in the length direction;
35, 35 are formed. The drain pipe 2 shown in FIG. 7 includes a gutter member 37 having a semicircular arc plate shape and having fitting grooves 36, 36 at both end edges, and a cover piece 39 having a semicircular arc plate shape covering the opening of the gutter member 37. 39, and both end edges 4 of the cover piece 39 are formed so that an opening 6 of a required width is formed between the adjacent cover pieces 39, 39.
0 and 40 are fitted into and fixed to the fitting grooves 36 and 36 of the gutter member 37.

8 and 9 show other examples of the winding member 5 together with its winding state, and the winding member 5 has legs 9 and 10 oppositely provided on both longitudinal side edges of the substrate 7.
The configuration is different from that in the previous embodiment.
One leg 9 of the winding member 5 shown in FIG. 8 is formed as a projecting piece, and the other leg 10 is formed in a groove shape. The leg part 9 is wound around the circumferential surface part 3 so that the leg part 9 as a projecting piece is accommodated in the groove of the leg part 10 which has a groove shape and comes into contact with the leg part 3 . Further, one leg 9 of the winding member 5 shown in FIG. 9 is formed as a hook piece 41, and the other leg part 10 is formed in the shape of a groove having a hook piece 42 on the outside. 5 is wound around the peripheral surface 3 of the drain pipe 2 with the hook pieces 41 and 42 of both legs 9 and 10 engaged with each other. In such an engaged state, the entire wound portion becomes extremely stable. In addition, in FIGS. 8 and 9, a curved channel 17 is formed at the connecting portion of the side edges of adjacent windings, and a water collection gap 19 is connected to the curved channel 17 so as to communicate with the spiral channel 13. It is set up.

In the embodiment described above, a bent flow path 17 is formed in the adjacent winding side edge portions 15 and 16, and the bent flow path 17 is
Although it is preferable to exert a filter function and prevent soil particles from entering the spiral waterway 13 as much as possible, it is not essential for the present invention to form the bent flow path.

In the present invention, the drain pipe 2 having the opening 6 does not exclude a drain pipe 2 provided with an opening (through hole) as shown in FIG. 10.

(Effects of the Invention) (a) The underdrain collection and drainage pipe of the present invention not only makes it possible to efficiently collect and drain ground water in a short period of time, but also effectively. Collecting and draining water will continue for many years.

In the underdrain collection and drainage pipe of the present invention, since the water collection gap is continuously formed along the circumferential surface of the drainage pipe, the length thereof is extremely long, and all of them have sufficient water collection capacity. , unlike the conventional perforated pipes mentioned above,
Water can be collected around the entire perimeter including the bottom.

In addition, since the water collection gap continues in a spiral shape along the circumference of the drain pipe, even if a part of it becomes clogged, the ground water in the clogged area will flow into the vicinity of the clogged area. Because the water flows into the spiral channel through the water collection gap, it takes many years for the entire water collection gap to become clogged. Furthermore, since the spiral waterway is provided to cover the peripheral surface of the drain pipe, even if some of the water inflow openings provided on the peripheral surface become clogged,
The water in the spiral channel flows freely within the spiral channel and can also flow in the length direction of the peripheral surface through adjacent water collection gaps, so that the water in the spiral channel can flow freely within the spiral channel. It flows into the drain pipe through an opening located downstream of the blockage opening. In this way, when looking at a certain part of an opening, it not only allows the ground water on the surrounding surface to flow into the drain pipe, but also allows the ground water collected in the part far away from the opening to flow into the drain pipe. It is intended to cause an inflow into the country.

Furthermore, since clean water with less particulate matter that has been filtered in the water collection gap flows into the opening of the drain pipe, it is possible to set the opening to be large, thereby reducing the number of openings. Also, the water that has flowed into the spiral waterway can immediately flow into the drain pipe. Because of this, and because a layer of water is formed around the drain pipe due to the existence of the spiral waterway, it is possible to provide the opening as close to the side of the drain pipe as possible, making it possible to provide the opening as close to the side of the drain pipe as possible. Unlike the case with perforated drain pipes, the water level in the drain pipe can be set high. In other words, the flow rate in the drain pipe can be increased.

(b) Since the underdrain collection and drainage pipe of the present invention has a winding member wound around the peripheral surface of the drain pipe, the drainage pipe is effectively reinforced by the winding member.

[Brief explanation of drawings]

FIG. 1 is a perspective view showing an embodiment of the underdrain collection and drainage pipe according to the present invention together with a connecting pipe body, FIG. 2 is a sectional view showing an embodiment of the underdrain collection and drainage pipe according to the invention at its end portion, Fig. 3 is a front view showing the state in which the culvert collection and drainage pipes are connected to each other, Fig. 4 is a perspective view showing the state in which the culvert collection and drainage pipe is used, and Fig. 5 is a sectional view showing the state in which the culvert collection and drainage pipe is used. Figures 6 and 7 are perspective views showing other examples of drainage pipes, Figures 8 and 9 are sectional views showing other examples of winding members, and Figure 10 is an example of a conventional culvert collection and drainage pipe. It is a sectional view shown in a state. DESCRIPTION OF SYMBOLS 1... Underdrain collection drain pipe, 2... Drain pipe, 3... Surrounding part, 5... Winding member, 6... Opening, 7... Substrate, 9, 10... Leg, 13... Screw line waterway, 1
5, 16... Winding side edge portion, 19... Water collection gap.

Claims (1)

[Claims] 1 A drain pipe 2 having an opening 6 for water inflow on the peripheral surface 3 and legs 9, 1 on both longitudinal edges of the base plate 7.
The winding member 5 is attached to the circumferential surface 3 of the drain pipe 2, and the legs 9 and 10 are attached to the circumferential surface 3. The spiral water channel 13 is formed between the substrate 7 and the peripheral surface portion 3 by winding it in a spiral manner so as to protrude toward the direction of the winding surface, and the spiral water channel 13 is formed at the winding side edge portions 15 and 16 in communication with the spiral water channel 13. An underdrain collection and drainage pipe characterized in that a water collection gap 19 is formed.