JPH09144117A - Construction method for underground infiltration type side ditch - Google Patents

Abstract

PROBLEM TO BE SOLVED: To efficiently construct a side ditch efficiently infiltrating part of flowing water into the underground. SOLUTION: Foundation boards 7 are mounted at required intervals on the bottom portion 6 of a side ditch construction section. Gate-shaped side ditch blocks 1 opened at the lower end are continuously installed while both end portions and intermediate portions are mounted on the foundation boards 7. Concrete is placed in recesses 17 formed between the form pieces 13, 13 erected at both end portions in the side ditch longitudinal direction of the foundation boards 7 and the side wall inner walls of a side ditch. Crushed stones 21 are filled in recesses 20 formed between the opposite forme pieces 13, 13 of the adjacent foundation boards 7, 7 to form an underground infiltration section of flowing water.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for constructing a gutter for infiltrating a part of flowing water underground.

[0002]

2. Description of the Related Art As urbanization progresses, roads and residential lands are gradually paved with asphalt and the like, and at the same time, equipment is provided so that rainfall on these roads and residential lands is drained into gutters and flowed to rivers.

However, conventional gutters are almost always
Because it was constructed with emphasis only on the function as a water channel, if there was a large amount of rainfall, water from many gutters would flow into the river at one time, and as a result, the river might overflow and cause flood damage. . In addition, since the ground of the pavement has little infiltration of rainwater into the ground, the water level of the groundwater is lowered, which is one of the causes of inhibiting the growth of trees such as street trees and causing a problem of depletion of water sources.

As an example of an underground seepage type gutter which can solve such a problem, Japanese Unexamined Utility Model Publication No. 4-1284 discloses a gutter. As shown in FIG. 10, one example of the gutter is formed by casting bottom concrete into the open bottom of a gate-shaped gutter block a having an open lower end to form a gutter bottom b, and forming a drainage hole c in the bottom. Were provided.

[0005]

However, when the gutter is constructed using the gate-shaped gutter block,
In order to provide a large number of drainage holes at the bottom, many cores must be arranged at required positions prior to casting of the bottom concrete, and there is a problem that the construction is troublesome and troublesome. In addition, from the viewpoint of preventing an increase in underground seepage and a decrease in seepage due to clogging, it is necessary to provide more drainage holes in order to secure a wide infiltration area. It took time.

SUMMARY OF THE INVENTION An object of the present invention is to provide a method of constructing an underground infiltration type gutter capable of easily constructing a gutter bottom while securing a wide underground infiltration area when a gate-shaped gutter block having an open lower end is used. Is what you do.

[0007]

According to the construction method of the underground seepage type gutter according to the present invention, a concrete base plate is placed on a bottom portion of a gutter construction portion at a required interval, and then the upper end portions of both side walls are provided. By mounting at least both end portions in the longitudinal direction of the both side walls of the lower end open gutter block connected to each other by the connecting beam on the base plate, the gutter block is connected to the gutter construction portion. Laying, then, formwork pieces in an upright state at both end portions or both end portions in the side groove length direction of the base plate,
Concrete is poured into a concrete filling recess formed between the side wall inner surface of the gutter and the concrete filling recess to form a gutter bottom having a water channel gradient, and formed between opposed formwork pieces of adjacent base plates. The recess is filled with a stone to form an underground seepage portion of running water, and the upper surface of the gutter bottom and the upper surface of the underground seepage portion form a continuous bottom surface of a gutter having a channel gradient. Things.

In the above construction method, it is preferable that both end portions and an intermediate portion in the length direction of both side walls of the side groove block are respectively mounted on separate base plates.

In each of the above construction methods, the bottom piece of an angle-shaped member having a bottom piece and a vertical piece that are at right angles to each other is embedded in a base plate, and the form piece made of the vertical piece is mounted on the base plate. It is good to be provided in the installation state. Alternatively, the form piece and the base plate are preferably formed integrally with concrete.

In another embodiment of the construction method according to the present invention, a concrete base plate is placed at a required interval on a bottom portion of a gutter construction portion, and then upper ends of both side walls are connected to each other by connecting beams. By placing at least both end portions in the length direction of the both side walls of the side groove block having the lower end open on the base plate, the side groove block is laid in a state of being continuously connected to the side groove construction portion,
Then, a concrete bottom plate is placed on the base plate and between the side walls of the side grooves, and a gap between the bottom plate and the inner surface of the side wall is filled with concrete to fill the gap, thereby having a water channel gradient. A groove formed at the bottom of the gutter, and a recess formed between the adjacent bottom plates is filled with stone to form an underground infiltration portion of flowing water, and an upper surface of the gutter bottom and an upper surface of the underground infiltration portion form a channel slope. And forming a continuous bottom surface of the side groove having the following.

In this case, it is preferable that both end portions and an intermediate portion in the longitudinal direction of both side walls of the side groove block are mounted on separate base plates.

[0012]

BEST MODE FOR CARRYING OUT THE INVENTION

[First Embodiment] FIG. 1 illustrates a gutter block 1 used in the construction method of an underground seepage type gutter according to the present invention. The gutter block 1 is configured as a precast concrete block having a gate-shaped lower end formed by connecting both end portions of upper ends of both side walls 2 and 2 with connecting beams 3 and 3.

In order to construct the underground seepage type gutter 5 using the gutter block 1 having such a structure, as shown in FIGS. 2 to 4, after excavating the ground to form a gutter construction part, the excavation part is formed. On the bottom part 6, a rectangular base plate 7 made of concrete is placed at required intervals. Thereafter, both end portions 9, 9 in the longitudinal direction of both side walls 2, 2 of the side groove block 1 are placed on half 10, 10 in the longitudinal direction of the base plate 7, and
The intermediate portion between the side walls 2 and 2 is also placed on the base plate 7, and the side groove blocks are sequentially laid on the bottom portion 6 in this manner.

As shown in FIGS. 1 and 4, at both ends of the base plate 7 in the side groove length direction, formwork pieces whose both ends 11, 11 are substantially in contact with the inner surfaces 12, 12 of both side walls 2, 2. 13,13
Is erected. In this embodiment, as shown in FIG. 5, the form piece 13 has a bottom piece 14 and a vertical piece 15 that are perpendicular to each other (in the present embodiment, the width of the vertical piece 15 is larger than that of the bottom piece 14). Angle-shaped member 1 comprising
The bottom piece 14 of 6 is buried in the base plate 7, and the form piece 13 composed of the standing piece 15 is provided.

After that, concrete is poured into the concrete filling recess 17 formed between the two mold pieces 13, 13 and the side wall inner surfaces 12, 12 to form a gutter bottom 19.

Further, crushed stones 21 are filled in recesses 20 formed between the facing mold pieces 13 of the adjacent base plates 7, 7, and this portion is used as an underground permeation portion 22 of running water. The upper surface 23 of the gutter bottom 19 thus formed and the underground infiltration part 2
The second upper surface 25 forms a continuous bottom surface of a gutter having a water channel gradient.

However, in the gutter having such a configuration, a part of the running water in the gutter is permeated into the ground through the underground permeation portion 22. In the present embodiment, as shown in FIG. 6, the mold piece 13 and the base plate 7 can be integrally formed with concrete. A concrete filling recess 17 can be formed between the inner surfaces 12 and 12.

[Second Embodiment] FIGS. 7 and 8 illustrate another construction method of an underground seepage type gutter according to the present invention. In forming, instead of the above-described configuration in which concrete is cast in a recess between the formwork piece and the inner surface of the side wall, a concrete material shown in FIG. A rectangular plate-shaped bottom plate 26 is placed, and concrete is filled in the gap g between the bottom plate 26 and the side wall inner surface 11 to fill the gap g (indicated by reference numeral 27 in FIG. 8).
9 is different.

Then, as shown in FIG. 2, the recess 20 formed between the adjacent bottom plates 26, 26 is filled with stone to form the underground permeation portion 22 of the running water, and the upper surface 23 of the gutter bottom portion 19 is formed. And the upper surface 25 of the underground infiltration part 22 to form a continuous bottom surface of a gutter having a water channel gradient is the same as described above,
Part of the flowing water can be permeated into the underground through the underground permeation section 22.

[0020]

The present invention has an excellent effect that a gutter having a stable structure can be efficiently constructed while forming a large-area underground permeated portion. That is, in the present invention, when constructing an underground seepage type gutter using a gate-shaped gutter block having an open lower end, at least both end portions of both side walls of the gutter block are placed on the base plate, and the gutter construction portion is provided. Can support the side groove block stably.

Then, since the underground seepage portion is formed by filling the recesses formed between the base plates with stones, it is possible to form the underground seepage portion with a large underground penetration amount and a large area that is difficult to be clogged.

[0022] In addition, the bottom of the gutter on the base plate is formed by casting concrete in a concrete filling recess formed between the formwork piece erected on the base plate and the inner surface of the side wall of the gutter. Thereby, it can be easily constructed in combination with on-site construction. Alternatively, by placing the bottom plate on the base plate and then filling the gap between the bottom plate and the inner surface of the side wall with concrete to fill the gap, the construction can be easily carried out together with on-site construction.
The bottom of the side groove also functions as a connecting beam for connecting the lower end portion of the side wall of the side groove, and there is no possibility that the side wall is narrowed and deformed by the earth pressure.

[Brief description of the drawings]

FIG. 1 is an exploded perspective view illustrating a construction method according to the present invention.

FIG. 2 is a plan view illustrating an underground seepage type gutter.

FIG. 3 is a longitudinal sectional view illustrating an underground seepage type gutter.

FIG. 4 is a cross-sectional view illustrating an underground infiltration type gutter.

FIG. 5 is a partially cutaway perspective view illustrating a base plate.

FIG. 6 is a perspective view illustrating another embodiment of a mold piece.

FIG. 7 is a cross-sectional view illustrating another embodiment of the present invention.

FIG. 8 is a partial cross-sectional view illustrating another aspect of an underground infiltration type gutter.

FIG. 9 is a perspective view illustrating how the bottom plate is placed on the base plate.

FIG. 10 is a perspective view illustrating a conventional subterranean infiltration type gutter.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Gutter block 2 Side wall 3 Connecting beam 5 Underground penetration type gutter 7 Base plate 13 Form piece 14 Bottom piece 15 Standing piece 16 Angle member 17 Concrete filling recess 19 Gutter bottom 20 recess 22 Underground penetration 26 bottom plate

Claims (6)

[Claims] 1. A concrete base plate is placed on a bottom portion of a gutter construction part at a required interval, and then upper ends of both side walls are connected to each other by a connecting beam. By placing at least both end portions in the length direction of the wall on the base plate, the gutter block is laid in a state of being continuously connected to the gutter construction portion, and thereafter, both end portions in the gutter length direction of the base plate or Formwork pieces in the standing state at the positions near both ends and concrete are poured into a concrete filling recess formed between the side wall inner surface of the side groove to form a side groove bottom having a water channel gradient, and The recesses formed between the opposing form pieces of the adjacent base plates are filled with stones to form the underground seepage portion of the flowing water, and the upper surface of the gutter bottom and the upper surface of the underground seepage portion have a water channel gradient. Underground seepage type gutter characterized by forming a continuous bottom surface of the gutter Construction method. 2. The method of constructing an underground seepage type gutter according to claim 1, wherein both end portions and intermediate portions in the longitudinal direction of both side walls of the gutter block are mounted on separate base plates. 3. An angle-shaped member having a bottom piece and a standing piece that are at right angles to each other, said bottom piece being buried in a base plate, and a form piece comprising said standing piece is provided upright on said base plate. 3. The method for constructing an underground seepage type gutter according to claim 1 or 2, wherein: 4. The method according to claim 1, wherein the form piece and the base plate are integrally formed of concrete.
The construction method of the underground seepage type gutter described above. 5. A concrete base plate is placed on a bottom portion of a gutter construction portion at a required interval, and then the upper ends of both side walls are connected to each other by connecting beams. By mounting at least both ends in the length direction of the wall on the base plate, the gutter block is laid in a state of being continuously connected to the gutter construction portion, and then concrete is placed on the base plate and between the side walls of the gutter. By placing concrete bottom plate and placing concrete in the gap between the bottom plate and the inner surface of the side wall to fill the gap, a gutter bottom having a channel gradient is formed, and between adjacent bottom plates. The formed recess is filled with stone to form an underground infiltration portion of running water, and the upper surface of the gutter bottom and the upper surface of the underground infiltration portion form a continuous bottom surface of a gutter having a channel gradient. Construction method of the underground seepage type gutter. 6. The method of constructing an underground seepage type gutter according to claim 5, wherein both end portions and intermediate portions in the longitudinal direction of both side walls of the gutter block are mounted on separate base plates.