JPH0781277B2 - Drainage structure of retaining wall - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a retaining wall draining structure for discharging water in a retaining wall.

[0002]

2. Description of the Related Art Water in a retaining wall whose slope is covered with a surface wall made of concrete, masonry, or block is slow to infiltrate underground, and if it is not removed, the retaining wall will collapse. Is also connected. Therefore, conventionally, as shown in FIG. 7, as a means for discharging the water in the retaining wall, the inner surface of the surface wall 3 and the soil 4
A non-woven fabric 9 is interposed between the surface layer wall 3 and the surface layer wall 3, and a water draining cylindrical pipe 10 is buried substantially horizontally so that the water in the retaining wall passes through the cylindrical pipe 10 and the surface layer wall. It is constructed so that it is always discharged from the surface of 3. still,
As a conventional water-draining pipe to be buried in the earth and sand, not only a round perforated pipe having a circular cross section but also, for example, a practical open pipe 52-6
It is also known to utilize a perforated tube having a triangular cross section, as described in Japanese Patent No. 1210.

[0003]

In the conventional retaining wall, a large number of drainage pipe openings are exposed over the entire surface of the surface wall. As a result, as a result of mischief, the cans and stones are rushed in, small animals enter, and the remains and dead bodies of their nests clog pipes, and the traces of water dripping under the openings remain clearly. In the case of the former, it can be dealt with by attaching a cap to the opening, but in the case of the latter, for example, moss grows in the shade, and if iron is included in the water, it will turn brown, so it is a pain to build a masonry pattern. Even on a tiled surface, the ugly stain marks impair aesthetics.

[0004]

DISCLOSURE OF THE INVENTION The present invention is a novel draining structure for the purpose of efficient drainage, the structure of which is in the central portion of at least two sides of a pipe having a triangular cross section.
A drainage pipe in which through holes are arranged in a row at intervals in the longitudinal direction is arranged along the back surface of the surface wall in an inclined posture, and the lower end is connected to a drainage port. Then, it is possible to use a pipe having through holes only on two surfaces and tightly fix it to the back side of the surface layer wall with the surface having no through holes facing upward.

[0005]

[Function] By arranging the drainage pipe on the back side of the surface layer in an inclined posture, water can be efficiently introduced from the entire surface on the back side of the surface wall. Since the water introduced into each pipe is collectively collected at the lower end and directly flows out to the gutter, the opening of the pipe is not exposed on the surface of the surface layer.

[0006]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A water draining structure for a retaining wall according to the present invention will be described with reference to the drawings. FIG. 1 shows a drainage pipe, which is made of vinyl chloride or polyethylene and has a thin wall with an equilateral triangular cross section, and has a length of several meters. Each edge portion is formed into a curved surface, and a through hole 2.2 ... Is formed in a line in the center of each surface.

In FIG. 2, reference numeral 3 denotes a surface wall made of concrete, having a trapezoidal cross section, a masonry pattern on the surface, and a drain pipe 1 between the earth and sand or crushed stone 4 on the back surface. Has been done. One side of the drainage pipes 1 is closely attached to the back surface of the surface layer wall 3, and the inclination directions of the adjacent drainage pipes 3 are alternately changed as shown in FIG. . The drainage pipes arranged in this way close their upper ends while connecting their lower ends to the drainage pipe 5. The drainage pipe 5 drains directly from each connection part to the front side of the surface layer wall 3 and is arranged along the back side of the surface layer wall 3 to collect water from each drainage pipe 1.1. It is also possible to provide two systems so that the current flows, or to provide only one system. The upper end closing part of the water draining pipe 1 may be individually closed with a cap, for example, as shown in FIG.
It is convenient if the connecting portions of the bent pipe as exemplified in a) are connected by the connecting member 6 having a triangular cross section that matches the outer peripheral shape of the water draining pipe 1. Further, the drainage pipe 1 and the drainage pipe 5 are, for example, one connection port cross section as illustrated in FIG. 4B is a triangle which matches the outer peripheral shape of the drainage pipe 1, and the other connection port cross section is the drainage pipe 1. The connecting member 6'having a necessary number of circular connecting portions matching the outer peripheral shape of the above is used. A plurality of types of these connecting members having different numbers of connecting ports and different cross-sectional shapes are prepared according to the application. Further, for the back surface of the surface layer wall, a fixing member 7 as shown in FIG. 5 is used, and the surface having no through hole is made to face up to be closely attached to the surface layer wall 3, and concrete nails 8 or an adhesive is used. And fix it.

The retaining wall constructed in this way is
Spring water flows into the water draining pipe 1 through the through holes 2.2 ..., and is collectively collected under the water draining pipe 1. The collected water is discharged from the lower end of the surface layer wall 3 to the outside of the retaining wall through the drainage pipe 5, so that the opening of the drainage pipe is at a low position and is difficult to see, which may cause mischief. Not only does it disappear, but also the dirt on the outlet is not a concern, and the aesthetic appearance of the surface of the surface layer wall 3 is maintained. The drainage pipe can be one that has through holes on only two sides. In that case, if the surface without holes is placed directly above, water can be collected from two sides, sand, etc. Intrusion of water is also reduced, and the flow path in the drainage pipe becomes V-shaped.
The flow velocity is high, and the sand that has flowed with water from the through holes is also discharged occasionally, so pipe clogging is less likely to occur (Fig. 6).

As described above, the water draining structure of the present invention has the advantages that the pipe has a triangular cross section, so that the pipe has high strength and that it is easily fixed in close contact with a flat surface. In addition, the circular perforated tube that has been used in the past does not have a clear vertical relationship, and through holes may be located on the lower surface to cause leakage, but when one surface is placed in close contact with the wall surface, it is a triangle. The edge part is located on the lower side to obtain a high flow velocity, and the through holes are located on the upper and left and right sides, and are reasonably arranged on the back surface of the surface layer wall so as to prevent leakage from the V-shaped channel. be able to.

In the present invention, the size of the drainage pipe,
The length, the number of through holes, the material, and the like can be changed as appropriate, and the through holes formed on each surface may be arranged in two rows, or the edge portions may be square. Further, the surface wall of the retaining wall on which the drainage pipe is constructed can be any of block stacking and mortar spraying, and the connection with the drainage pipe, the type of the drainage pipe, the piping direction, etc. are not limited to those in the embodiment.

[0011]

EFFECTS OF THE INVENTION A pipe having a triangular cross section is easily fixed to a wall surface, and when one surface is brought into close contact, the flow path becomes V-shaped, so that the flow velocity is high and the drainage efficiency is excellent. Also, by arranging the water on the inner surface of the surface wall in an inclined state, the water in the retaining wall can be efficiently introduced into the pipe and quickly discharged, and the drainage port is provided in the well-conspicuous surface of the surface wall. Do not expose.

[Brief description of drawings]

FIG. 1 is an explanatory view of a drainage pipe used in the present invention.

FIG. 2 is an explanatory diagram of a water draining structure according to the present invention.

FIG. 3 is an explanatory diagram showing an arrangement of pipes.

FIG. 4 a. 3B is an explanatory diagram of a joint member.

FIG. 5 is an explanatory diagram of a fixing member.

FIG. 6 is an explanatory view showing a state of collecting water and draining water into the water draining pipe.

FIG. 7 is a cross-sectional view showing a conventional drainage structure in a retaining wall.

[Explanation of symbols]

1.1 '・ ・ Drainage pipe, 2 ・ ・ Penetration hole, 3 ・ ・ Surface wall, 4 ・ ・ Sand and crushed stone, 5 ・ ・ Drainage pipe, 6.6' ・
・ Connecting members, 7 ・ ・ Fixing members, 8 ・ ・ Concrete nails,
9 ... Nonwoven fabric, 10 ... Cylindrical pipe.

Claims (2)

[Claims] 1. A drainage pipe in which a through hole is provided in the center of at least two surfaces of a pipe having a triangular cross-section at intervals in the longitudinal direction in a row, in a posture inclined to the back surface of the surface wall. A drainage structure for the retaining wall, which is characterized in that the lower end is connected to the drainage port. 2. The water retaining structure for a retaining wall according to claim 1, wherein the pipe has through holes only on two surfaces and is closely fixed to the back side of the surface layer wall with the surface not having the through holes facing upward.