JPS6220504Y2 - - Google Patents

Description

[Detailed description of the invention] The present invention relates to a drainage pipe suitable for use as a buried drainage pipe for artificially draining surface water and underground surface water on sloped ground to prevent scouring of the sloped land. It is something.

Various methods have already been devised to artificially drain underground water by burying hollow filtration pipes in the sandy ground, but the amount of water that flows down the ground during heavy rainfall is large, and on steep slopes, so-called flash floods can occur. Disasters cannot be prevented. In other words, when there is a small amount of rainfall, precipitation permeates underground and forms a groundwater system, so by burying conventional hollow filtration pipes, softening of the ground and landslides can be partially avoided. However, in times of heavy rainfall, the amount of water that flows down the surface of the earth is much greater than the amount that permeates into the ground, and the water pressure causes the surface to scour and sweep away, causing sediment to be washed downstream. , causing a huge disaster.

In view of these points, the present invention has been developed by constructing a cylindrical body with a drainage guide plate partially exposed on the ground surface, in order to drain not only underground surface runoff but also surface runoff that occurs during heavy rainfall. The main objective is to propose a drainage pipe that eliminates these drawbacks.

An embodiment of the present invention will be described in detail below with reference to the drawings.

FIG. 1 is a perspective view showing an example of the drain pipe of the present invention. Reference numeral 1 indicates a cylindrical body having a circular cross section, which is made of synthetic resin or metal. Cylindrical body 1
A cut groove 1a is formed in the axial direction in the upper part of the pipe, and a drainage guide plate 3 is press-fitted into the cut groove 1a. In this case, by using a vinyl chloride pipe for the cylindrical body 1, internal strain is generated in the circumferential direction, so if this strain is utilized for insertion, no particular adhesive is required.
Of course, this does not preclude the use of adhesives in combination. The drainage guide plate 3 has a structure in which a nonwoven fabric 5 is bonded to the front and back sides of a net 4 made of synthetic resin such as vinyl chloride. The width W can be within twice the diameter of the cylindrical body 1 in consideration of the withstand pressure of the ground when buried in the trench 2a excavated in the ground 2. and full width W
Insert 1/4 of it into the cylindrical body 1, as shown in Fig. 2,
A drainage guide plate 3 is provided so that 1/2 to 1/4 of 3/4 of the total width W protrudes from the cylindrical body 1 and is exposed from the ground surface 2b. The cylindrical body 1 may have not only a circular cross section but also an elliptical or polygonal cross section. The thickness of the drainage guide plate 3 can be increased by making the net 4 thicker considering the expected amount of drainage, but two or more guide plates 3 of a certain thickness may be stacked and inserted into the groove 1a. You can do it like this.

FIG. 3 is a perspective view showing another example of the present invention.
In this example, a plurality of rows of drainage guiding plates 3 are provided radially. With this configuration, more surface water can be dammed,
Therefore, flash flood disasters can be prevented and a larger amount of water can be introduced into the cylindrical body 1.

FIG. 4 is a sectional view showing still another example of the present invention. In this example, the structure is almost the same as the example in FIG. It was inserted to near the ground surface.
According to such a configuration, even if the flowing water that flows down the ground surface and is caught by the drainage guide plate 3 contains finely divided mud, the sand 7 prevents its infiltration, prevents clogging, and ultimately improves the long-term lifespan. It can withstand use and requires less maintenance.

As described above, according to the present invention, a drainage guide plate having the front and back sides of the net-like body sandwiched with nonwoven fabric is press-fitted or glued into one or more grooves provided in the axial direction of the cylindrical body, and the upper part of the drainage guide plate is is formed so as to protrude from the cylindrical body, and the lower part is located within the cylindrical body, so by burying such a drainage pipe in the sloping ground and exposing the upper part of the drainage guide plate from the ground surface. The water flowing down the surface of the slope is partially dammed by the drainage guide plate, passes through the drainage guide plate, and is collected in the cylindrical body, thereby preventing soil from scouring the ground surface. At the same time, water that has permeated into the soil is also collected in the cylindrical body through the drainage guide plate at the surface stage. Therefore, it is possible to prevent the ground from becoming soft during rainfall, and disasters such as flash floods and landslides can be prevented.

[Brief explanation of the drawing]

Figure 1 is a perspective view showing an example of the proposed drainage pipe, Figure 2
The figure is a sectional view showing an example in which the device is buried underground, FIG. 3 is a perspective view showing another example of the present invention, and FIG. 4 is a sectional view showing still another example of the present invention. 1... Cylindrical body, 1a... Cut groove, 3... Drain guide plate, 4
...Net-like body, 5...Nonwoven fabric.

Claims (1)

[Scope of utility model registration request] A drainage guide plate having the front and back sides of the net-shaped body sandwiched with nonwoven fabric is press-fitted or glued into one or more grooves provided in the axial direction of the cylindrical body, and the upper part of the drainage guide plate is formed to protrude from the cylindrical body. A drain pipe characterized in that a lower portion thereof is located within the cylindrical body.