JPH09177107A - Manhole cover equipment - Google Patents

Abstract

PROBLEM TO BE SOLVED: To make a view excellent by forming draining ports in the peripheral side wall of a manhole cover, by putting soil inside the manhole cover and by setting out a plant in the soil. SOLUTION: A support frame 2 is fixed on the upper end face of a concrete square frame 1 with anchor bolts 3 interposed. Next, a dish-shaped manhole cover 10 is fitted detachably inside the support frame 2. Subsequently, obsidian pearlite is laid in the inner bottom part of the manhole cover 10 to a level being almost as high as draining ports 14 provided in the peripheral side wall 11 of the manhole cover 10, so as to form a water retaining-draining layer 20. Then, a filter 21 is laid on the water retaining-draining layer 20 and also artificial soil 22 being light in weight and containing organic matter is laid and filled on the filter 21 almost to the height of the upper surface of the manhole cover 10. Moreover, turf B is set out on the artificial soil 22.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a manhole cover device fitted into an opening of a manhole provided in a planting site such as a green space park or a community plaza. The manhole referred to in the present invention includes a so-called handhole, a rectangular water collecting port, and the like, in addition to a normal circular manhole.

[0002]

2. Description of the Related Art There is a case where a manhole leading to a sewer is provided in a planting site such as a green park or a community plaza. A manhole cover is removably fitted in the opening of the manhole. Usually, this type of manhole cover is made of cast metal, and the entire surface of the manhole cover is generally exposed as it is on the planting site.

[0003]

[Problems to be Solved by the Invention] However, when a manhole cover made of cast metal is exposed as it is on a planting site such as a green space park or a community plaza, the manhole cover is visually visible in the planting or lawn upholstery of the site. Even if it is clearly visible, the manhole cover greatly obstructs the entire landscape, even if the planting and turf tension are properly arranged.

In recent years, a filling type makeup manhole cover in which a manhole cover is formed in a dish shape and a makeup block is spread and filled in the manhole cover has been provided, but such a manhole cover is provided. Even if you use, it is difficult to maintain a good landscape because it is not in harmony with the surrounding vegetation and the lawn upholstery.

The present invention has been made by paying attention to such a point, and its purpose is to make the entire landscape of the planting site good by matching the manhole cover with the surrounding planting and lawn upholstery. An object is to provide a manhole cover device that can be held.

[0006]

In order to achieve such an object, the present invention has a drain hole formed in the peripheral side wall of a dish-shaped manhole cover, and the manhole cover is filled with soil. Plants such as turf, grass, vines and shrubs are planted on the manhole cover via.

In particular, in the invention according to claim 2, a relatively coarse-grained stone such as black stone pearlite is laid on the inner bottom of the manhole cover to form a water retention / drainage layer, and the particles are placed on the water retention / drainage layer. The artificial soil of the above is spread and filled, and the plant is planted on the manhole cover through the artificial soil.

[0008]

BEST MODE FOR CARRYING OUT THE INVENTION Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 shows a first embodiment, and reference numeral 1 is, for example, a concrete stake that constitutes a manhole provided on a lawn-covered planting site A in a park for green spaces. The concrete stake 1 has a diameter of, for example, 600 mm. It is formed in a circular shape or a square shape with a side length of about 600 mm.

A receiving frame 2 is fixed to the upper end surface of the concrete stake 1 through anchor bolts 3. The receiving frame 2 is provided with a peripheral side wall 4 which stands up substantially vertically and a horizontal side wall attached to the lower part of the peripheral side wall 4. It is composed of a substrate 5.

The upper end of the peripheral side wall 4 is a site A where grass is stretched.
A drain pipe 6 is attached to one portion or a plurality of places below the peripheral side wall 4 so as to project slightly further upward, and the drain pipe 6 is buried in the soil of the site A. A standing piece 7 is formed on the inner peripheral edge of the substrate 5, and a cushioning packing 8 is mounted on the upper portion of the standing piece 7.

A dish-shaped manhole cover 10 is removably fitted inside the receiving frame 2. A peripheral side wall 11 of the manhole cover 10 is inclined slightly outward toward the upper side, and an upper end edge of the peripheral side wall 11 is arranged at a position substantially at the same level as an upper end edge of the peripheral side wall 4 of the receiving frame 2.

A plurality of leg pieces 1 are provided on the outer surface of the lower portion of the peripheral side wall 11.
3 are evenly provided, and these leg pieces 13 abut on the base plate 5 of the receiving frame 2, whereby the whole manhole cover 10 is supported horizontally, and in this state, the manhole cover 10
The bottom surface of the concrete container 1 is in close contact with the cushioning packing 8, whereby the opening at the upper end of the concrete container 1 is sealed.

A plurality of drainage ports 1 are provided at a position slightly below the middle stage of the peripheral side wall 11 of the manhole cover 10.
4 are evenly formed, and reinforcing ribs 15 are integrally formed on the outer bottom surface of the manhole cover 10.

The peripheral side wall 11 of the manhole cover 10
A work handle 16 is provided inside the upper part of the work unit so as to be capable of expanding and contracting in the vertical direction so as to be opposed to each other. When the manhole cover 10 is attached or detached, the handle 16 can be pulled out upward to perform the work. It has become.

This embodiment is an example of the case where grass is stretched on the inner upper surface of the manhole cover 10. In this case, first, black gypsum pearlite (a relatively coarse-grained porous material) is formed on the inner bottom of the manhole cover 10. Stone) drain port 14
The water retention / drainage layer 20 is formed by laying the water retention / drainage layer 20 to a level almost the same as that of

Next, a water retaining material consisting of black stone perlite
A filter 21 is laid on the drainage layer 20, and an ultra-lightweight organic-containing artificial soil 22 is laid on the filter 21 up to almost the height of the upper surface of the manhole cover 10 to fill it. Then, the lawn B is stretched on the artificial soil 22.

When water is supplied onto the lawn B by rainwater or irrigation in this state, the water spreads on the artificial soil 22 and further permeates the water retention / drainage layer 20 through the filter 21. Then, an appropriate amount of water is stored in the water retention / drainage layer 20, and excess water flows out from the drainage port 14. Then, this water permeates and drains into the soil of the site A through the drainage pipe 6.

The artificial soil 22 is an ultra-lightweight fine powder containing an organic component and has good breathability, water retention and nutrient properties, and the water retention / drainage layer 20 covered with black stone perlite is appropriate. With sufficient water retention and drainage, a sufficient air layer is generated in the layer, sufficient oxygen is supplied to the artificial soil 22 based on this air layer, whereby good growth conditions for the turf B are set, Without water withdrawal or root rot,
The turf B stretched over the artificial soil 22 grows vividly. The filter 21 has a function of promoting water flow and evaporation of water and suppressing the outflow of the artificial soil 22 in powder form.

As described above, since the lawn B is stretched on the surface of the manhole cover 10, the manhole cover 1
The surface 0 of the grass B and the grass of the surrounding planting site A are in harmony, and the manhole cover 10 is confused in the site A and is visually inconspicuous. Therefore, the entire landscape of the site A can be kept good. it can.

However, when the manhole cover 10 is opened and closed for maintenance, etc., the manhole cover 10
It's inconvenient if you don't know the position of the
The contours of the upper end of the peripheral side wall 4 and the upper end of the peripheral side wall 11 of the manhole cover 10 are exposed on the site A as a finding, and therefore the manhole cover 10 is approached and the site A is approached.
The position of the manhole cover 10 can be easily confirmed by looking above.

FIG. 2 shows a second embodiment, which is an example of planting grass and vine plants inside the manhole cover 10. In this embodiment, the drain port 14 is formed at the middle part of the peripheral side wall of the manhole cover 10, that is, at a position higher than that of the first embodiment.

In the case of the second embodiment, first, the black bottom stone perlite is laid on the inner bottom portion of the manhole cover 10 in a relatively thick layer having substantially the same height as the drainage port 14 to retain the water / drainage layer 20. And then this water retention
A filter 21 is laid on the drainage layer 20, and an artificial soil 22 containing an ultralight organic material is laid on the filter 21 up to almost the height of the upper surface of the manhole cover 10 to fill the artificial soil 22. Plant grass and vine plant B on.

Also in this case, the plant B of grass and vines grows well due to the air permeability of the artificial soil 22 and the water retention / drainage layer 20 of the black gypsum perlite. To do.

FIG. 3 shows a third embodiment, and this embodiment is an example of a case where a shrub is planted inside the manhole cover 10. In this embodiment, the drainage port 14 is formed in the lower portion of the peripheral side wall of the manhole cover 10.

In the case of the third embodiment, first, the black bottom stone perlite is laid on the inner bottom of the manhole cover 10 in a relatively thin layer having substantially the same height as the drainage port 14 to retain the water / drainage layer 20. And then this water retention
A filter 21 is laid on the drainage layer 20, and an artificial soil 22 containing an ultralight organic material is stuffed on the filter 21 in a relatively thick layer reaching the height of almost the upper surface of the manhole cover 10 to fill the artificial soil. Plant the roots of shrub B in soil 22. Then, if necessary, mulching 23 is applied on the surface of the artificial soil 22 so as to surround the trunk of the shrub B.

Also in this case, the shrub B grows well due to the air permeability of the artificial soil 22 and the water retention / drainage layer 20 of the black gypsum perlite.

[0027]

As described above, according to the present invention,
Drain holes are formed on the side wall of the dish-shaped manhole cover, soil is filled in this manhole cover, and plants such as grass, grass, vines and shrubs can be planted on the manhole cover through this soil. Therefore, the manhole cover becomes visually inconspicuous by matching with the surrounding vegetation and lawn upholstery, so that the entire landscape of the planting site can be well maintained.

In particular, in the invention according to claim 2, a relatively coarse-grained stone such as black stone pearlite is laid in the manhole cover to form a water retention / drainage layer, and the particles are placed on the water retention / drainage layer. Since we laid out and filled a small artificial soil of, and planted plants in this artificial soil, water retention, drainage, oxygen supply etc. were properly maintained
The plant can be grown healthy without causing root rot.

[Brief description of the drawings]

FIG. 1 is a sectional view of a manhole cover device according to a first embodiment of the present invention.

FIG. 2 is a sectional view of a manhole cover device according to a second embodiment of the present invention.

FIG. 3 is a sectional view of a manhole cover device according to a third embodiment of the present invention.

[Explanation of symbols] 1 ... Concrete basin 2 ... Receiving frame 10 ... Manhole cover 14 ... Drainage port 20 ... Water retention / drainage layer 22 ... Artificial soil

Claims (2)

[Claims] 1. A drain hole is formed on a peripheral side wall of a manhole cover having a dish shape, soil is filled in the manhole cover, and plants are planted on the manhole cover through the soil. Manhole cover device. 2. A drainage port is formed on the peripheral side wall of a dish-shaped manhole cover, and a relatively coarse-grained stone such as black stone perlite is laid on the inner bottom of the manhole cover to form a water retention / drainage layer. The manhole cover device is characterized in that an artificial soil with fine particles is laid and filled on the water retention / drainage layer, and a plant is planted on the manhole cover through the artificial soil.