JP2012172305A - Drain cylinder - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a drain cylinder capable of more efficiently taking in underground water, surface water, water on a roof, or the like.SOLUTION: In a drain cylinder, an upward nonporous bottom half-cylinder 1 has a radius such that, when a downward porous half-cylinder 2 is put on the nonporous bottom half-cylinder 1, edges 21 parallel to a central axis of the porous half-cylinder 2 are dropped into the nonporous bottom half-cylinder 1. The edges 21 of the porous half-cylinder 2 are dropped into the nonporous bottom half-cylinder 1, which forms clearance between both as a side face groove 3.

Description

  The present invention relates to a drain tube for draining water such as underground water, ground surface water, and roof of a structure.

To prevent landslides and retaining walls from falling due to groundwater pressure, install drainage pipes with through holes in the ground and guide the pore water around the pipes collected through the through holes from the ground to the surface. Drainage technology for draining is known.
Among these technologies, there is known a drainage cylinder in which a cylinder is installed in the ground and its upper half is constructed with a perforated structure and the lower half is constructed with a non-porous structure. The applicant has already developed it. It was.

JP2003-232028A. JP 2006-336338 A.

However, it has been found that there are the following problems in the drain tube as described above.
(1) Since the perforated part is provided only in the upper half in the installed state, if water is collected from the drain hole of the perforated part, water will not leak from the lower half to the surroundings. It was clear that the drainage performance was very good as compared with the drainage cylinder having a perforated portion formed in the front periphery.
(2) However, the inventor of the present application aimed to develop a drainage tube with higher water collection efficiency. In order to increase the water collection efficiency, the size of the drain hole in the perforated portion may be increased. However, if the size of the hole is increased or the number of holes is increased, the strength as the drainage cylinder is lowered.
(3) Drainage pipes are inserted into holes that have been drilled in advance, but in fact, the wall of the hole may have collapsed. In that case, the drainage pipe should be driven into the earth and sand. Work is also required.
(4) For this reason, the structure that expands or expands the hole area becomes a drainage cylinder that cannot withstand messy work such as tapping into the ground, and the perforated part is easily damaged during work. It turned out, and it turned out that it was a fall at the end.
(5) The above is a problem when draining groundwater. However, when draining ground surface water or draining water from the roof of a structure, the same problem arises because strength is required. Can be considered.

In order to solve the problems as described above, the drainage cylinder of the present invention comprises at least a non-hole bottom half cylinder and a perforated half cylinder, and the non-hole bottom half cylinder and the non-hole lid half cylinder are cylindrical non-holes. A perforated steel pipe is a half cylinder cut by a line parallel to the central axis, and a perforated half cylinder is a half cylinder in which a perforated plate is formed in a semicircular cross section, The radius of the cylinder is larger than the radius of the perforated half cylinder, and the edge parallel to the central axis of the perforated half cylinder when the upward perforated bottom half cylinder is covered with the downward perforated half cylinder Is a radius that falls to the inside of the non-hole bottom half-cylinder, and the drainage cylinder that the gap between the two is formed as a side groove by the edge of the perforated half-cylinder falling into the inside of the non-hole bottom half-cylinder It is characterized by.
Further, the drainage cylinder of the present invention comprises a non-hole bottom half cylinder, a perforated half cylinder, and a non-hole lid cylinder, and the non-hole bottom half cylinder and the non-hole lid half cylinder include a cylindrical non-hole steel pipe, A semi-cylinder in a state cut by a line parallel to the central axis, a perforated half-cylinder is a half-cylinder in which a perforated plate is formed in a semicircular cross-section, and the radius of the non-perforated bottom half-cylinder is When the upper perforated half cylinder is covered with the downward perforated half cylinder, the edge parallel to the central axis of the perforated half cylinder is The radius is such that it falls into the inside of the half cylinder, and when an upward non-hole bottom half cylinder is covered with a downward non-hole lid half cylinder, an edge parallel to the central axis of the non-hole bottom half cylinder The radius is parallel to the edge parallel to the central axis of the hole-covered half cylinder, and the edge of the perforated half-cylinder falls into the inside of the non-hole bottom half-cylinder, thereby forming a gap between them as a side groove. It is characterized by a drain.

The drain tube of the present invention can obtain at least one of the following effects by means for solving the above-described problems.
(1) The non-perforated portion is continuously formed along the longitudinal direction of the pipe body in the peripheral surface of the pipe body of the upper perforated drainage tube to prevent the water from coming out from the non-porous part. be able to. Therefore, it is possible to prevent the phenomenon that the water that has escaped penetrates into the ground again, which is excellent in drainage effect, and it is possible to efficiently prevent landslide and retaining wall collapse.
(2) When the perforated half cylinder is covered from above the non-perforated bottom half cylinder, the edge parallel to the central axis of the perforated half cylinder falls into the inside of the perforated bottom half cylinder. is there. For this reason, a side groove is formed between the edge of the perforated half cylinder and the inner side surface of the non-perforated bottom half cylinder. As a result, water can be efficiently introduced not only from the opening portion of the water passage hole of the perforated half tube but also from the side grooves formed at the edges on both sides of the perforated half tube.
(3) In particular, this side groove can be formed over the entire length of the perforated half cylinder except for the spot welded portion, so that it can open an area several times that of individual drain holes and can introduce groundwater. It can achieve very high water collection efficiency.
(4) Even if this side groove is provided, unlike the case where the area of the drain hole of the perforated half cylinder is increased, the strength of the perforated half cylinder will not be reduced. It can withstand messy work like slamming.
(5) Especially in areas where a large amount of snow melts in the spring, the use of the steel pipe of the present invention can drain a large amount of underground water using a simple method, thus preventing damage from landslides. It is possible to prevent human life and economic loss to a minimum.
(6) Displacement of excess surplus water existing in the ground will improve earthquake resistance and seismic isolation.
(7) Even when one drain tube cannot be formed long, a long drain tube can be formed by using a joint pipe to connect a plurality of drain tubes sequentially. For this reason, it is possible to easily secure the required length of the site.
(8) The above effect was the effect when draining groundwater, but the same effect can be expected when draining ground surface water or draining roof water of structures. .

The exploded explanatory view of the example of the drain tube of the present invention. The exploded explanatory view from the side of the example of a drain pipe. Sectional drawing of the formation state of the side surface groove | channel provided in the drain tube. The top view of the formation state of the side surface groove | channel provided in the drain tube.

  Hereinafter, preferred embodiments of the drain tube of the present invention will be described in detail with reference to the drawings.

<1> Overall configuration.
The drainage cylinder of the present invention comprises a non-hole bottom half cylinder 1, a perforated half cylinder 2, and, in some cases, a non-hole lid half cylinder 4.

<2> Non-hole bottom half cylinder.
The non-hole bottom half cylinder 1 is a “樋” -like half cylinder obtained by cutting a cylindrical non-hole steel pipe along a line parallel to the central axis.
This non-hole bottom half cylinder 1 constitutes the lower half of the drain cylinder, and since it is non-hole, water does not leak out from the lower half.

<3> Perforated half cylinder.
The perforated half cylinder 2 is a half cylinder in a state in which a perforated plate is formed in a semicircular cross section.
The perforated plate is, for example, an expanded metal, a wire mesh, a steel plate with holes punched out, a synthetic resin plate with a large number of holes opened.
These holes function as drain holes 22 for introducing groundwater into the drain tube.
The perforated half-cylinder 2 is such a perforated plate formed in a “樋” shape having a substantially semicircular cross section, and is formed on both sides of the perforated half-cylinder 2 in a direction parallel to the central axis. An edge 21 can be formed.
Note that the cross section is not limited to a semicircular shape, but can be used even if it is formed in a double fold shape with a raised center.

<4> Radius of the perforated half cylinder.
There is a certain relationship between the radius of the perforated half cylinder 2 and the non-perforated bottom half cylinder 1.
That is, the radius of the non-hole bottom half cylinder 1 is formed larger than the radius of the perforated half cylinder 2.
Then, when the upward perforated bottom half cylinder 1 is covered with the downward perforated half cylinder 2, the edge of the perforated half cylinder 2 parallel to the central axis of the perforated half cylinder 2 is It falls into the inside of the tube 1.

<5> Formation of side grooves.
The end edge 21 parallel to the central axis of the perforated half cylinder 2 falls into the non-hole bottom half cylinder 1, whereby the end edge 21 of the perforated half cylinder 2 and the inner surface of the non-hole bottom half cylinder 1 There are some gaps between them. This gap is configured as a side groove 3.
Since the side groove 3 can be formed as an entire extension where the end edge 21 of the perforated half cylinder 2 and the non-perforated bottom half cylinder 1 are in contact with each other, water can be easily introduced therefrom.
After the perforated half cylinder 2 is dropped into the non-hole bottom half cylinder 1, they are welded at several welds 12 to integrate them.

<6> Non-porous lid half cylinder.
The perforated half cylinder 2 can be dropped over the entire length of the non-hole bottom half cylinder 1, and the side groove 3 extending over the entire length can be constituted by the edge 21 parallel to the central axis.
However, when it is necessary to ensure the strength, the non-porous lid half cylinder 4 is used.
The non-hole covered half cylinder 4 is a half cylinder in a state in which a cylindrical non-hole steel pipe is cut along a line parallel to the central axis, and is shorter than the length of the non-hole bottom half cylinder 1.

<7> Radius of the non-porous lid half cylinder.
When covering the non-holed bottom half cylinder 1 with the concave part of the non-porous lid half cylinder 4 facing downward and the concave part facing upward, an edge 41 parallel to the central axis of the non-porous lid half cylinder 4 The positions of the end edges 11 parallel to the central axis of the hole bottom half cylinder 1 can coincide to form a complete cylinder.
If this non-porous lid half cylinder 4 is covered over the entire length of the non-hole bottom half cylinder 1, it merely forms a cylinder, so it is only partially covered for reinforcement, and the basics are wide. It is to position the perforated half cylinder 2 over the range.

<8> Installation of drainage pipes.
Next, the actual use state of the drain tube of the present invention will be described.
A hole is drilled in advance on the slope, the drain tube of the present invention is inserted into the hole, and only the tail end is exposed to the outside of the slope.
Since the drain tube of the present invention does not drain water by using power, the drain tube is installed in a state where the drain tube gradually decreases toward the outside of the hole, and the ground water is allowed to flow naturally.
When inserting the drainage tube, even if there is some collapse of the earth and sand on the wall surface after drilling, the drainage tube of the present invention has a structure in which the drainage hole 22 is not opened excessively and the portion is replenished by the side groove 3. Therefore, the perforated half-cylinder 2 is not damaged even if a messy work such as tapping is performed, and the presence of the drain hole 22 does not become a weak point.
When inserting the drainage cylinder, the perforated half cylinder 2 is positioned above the drilling hole, and the non-hole bottom half cylinder 1 is positioned below the drilling hole.

<9> Introduction of groundwater.
Groundwater is introduced through two types of openings.
One is from the drain hole 22 which opened many to the perforated half cylinder 2 located in the upper half of the drain cylinder.
The other one is a side groove 3 formed between the edge 21 parallel to the central axis of the perforated half cylinder 2 and the inner surface of the non-perforated bottom half cylinder 1.
In particular, the side groove 3 can be formed along substantially the entire length of the edge 21 parallel to the central axis of the non-hole bottom half cylinder 1, so that a large amount of groundwater can be introduced very efficiently.

<10> Drainage.
Since the lower half of the drain tube is the non-hole bottom half tube 1, the water introduced into the drain tube is not leaked to the underground layer in the middle, and the entire amount is efficiently removed at the tail end of the drain tube. Can be discharged to the outside.

<11> Other uses.
The above is description of the function at the time of using the drain pipe of this invention for drainage of groundwater.
The same function is also achieved when the drainage tube of the present invention is installed on the ground surface to drain the water on the ground surface, or when it is installed as a gutter on the roof of the structure to drain the water. be able to.
In that case, since the dust on the ground surface and the fallen leaves accumulated on the roof are difficult to enter the non-hole bottom half cylinder 1 of the drainage cylinder, it can be said that the drainage function is difficult to be lowered.

1: Non-hole bottom half cylinder 2: Perforated half cylinder 3: Side groove 4: Non-hole lid half cylinder

Claims (2)

It comprises at least a non-holed bottom half cylinder 1 and a perforated half cylinder 2,
The non-hole bottom half cylinder 1 and the non-hole lid half cylinder 4 are half cylinders in a state where a cylindrical non-hole steel pipe is cut along a line parallel to the central axis,
The perforated half cylinder 2 is a half cylinder in a state in which a perforated plate is formed in a semicircular cross section.
The radius of the non-perforated bottom half cylinder 1 is formed larger than the radius of the perforated half cylinder 2,
When the upward perforated bottom half cylinder 1 is covered with the downward perforated half cylinder 2, the edge 21 parallel to the central axis of the perforated half cylinder 2 falls into the inside of the perforated bottom half cylinder 1. The radius of
The edge 21 of the perforated half cylinder 2 falls into the non-hole bottom half cylinder 1 so that a gap between the two is formed as a side groove 3.
Drain tube. It is composed of a non-perforated bottom half cylinder 1, a perforated half cylinder 2, and a non-porous lid cylinder,
The non-hole bottom half cylinder 1 and the non-hole lid half cylinder 4 are half cylinders in a state where a cylindrical non-hole steel pipe is cut along a line parallel to the central axis,
The perforated half cylinder 2 is a half cylinder in a state in which a perforated plate is formed in a semicircular cross section.
The radius of the non-perforated bottom half cylinder 1 is formed larger than the radius of the perforated half cylinder 2,
When the upward perforated bottom half cylinder 1 is covered with the downward perforated half cylinder 2, the edge 21 parallel to the central axis of the perforated half cylinder 2 falls into the inside of the perforated bottom half cylinder 1. The radius of
When the upward non-hole bottom half cylinder 1 is covered with the downward non-hole lid half cylinder 4, the edge 21 parallel to the central axis of the non-hole bottom half cylinder 1 and the center axis of the non-hole lid half cylinder 4 Is a radius at which edges 21 parallel to
The edge 21 of the perforated half cylinder 2 falls into the non-hole bottom half cylinder 1 so that a gap between the two is formed as a side groove 3.
Drain tube.

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