JPH08228618A - Feeding and draining water treatment apparatus for roof greening system - Google Patents

Abstract

PURPOSE: To rationalize the greening of a roof without wasting precious water resource by reusing the water used for the greening of the roof as a waste water reuse system for water closet, etc., cleaning the reused waste water and circulating to the roof for greening. CONSTITUTION: Water is cleaned in a water-collection trench 10 constructed in a ground soil 2G formed on a roof 2 of a building 1. The excess water cleaned by the water-collection trench 10 is collected and reused as a waste water reuse system for water closet 1T, etc. The water discharged from the water closet 1T is cleaned with a settling separation tank 6 or a septic tank 7, pumped up to the roof 2 and reused for the greening of the roof.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is used in the technical field of a rooftop greening system for greening the rooftops of various high-rise buildings such as office buildings and condominiums with trees. The present invention relates to a water supply / drainage treatment device for a rooftop greening system that supplies and drains water necessary for the greening of the.

[0002]

2. Description of the Related Art In order to green a rooftop of a building or the like, a base soil layer is formed on the rooftop and various trees for planting are planted on this soil layer. Due to the restriction, the soil cannot be generously filled, and therefore the space for growing roots is restricted and the total amount of effective water required for root growth is limited.Therefore, conventionally, improved soil with high water retention has been used. Trees have been protected from water stress, for example, by using artificial soil with a large amount of water retention.

However, it is theoretically impossible to store more water than the thickness of the soil layer even if the above-mentioned improved soil or artificial soil is used, and in addition, it is supplied by water sprinkling or precipitation. Of the water used, excess water such as surface runoff or gravity-penetrated water in the soil needs to be promptly drained to avoid water leakage from the roof, so the amount of water stored in the soil is extremely high. Furthermore, when it is dry, water is not naturally supplied from the lower soil layer like the natural earth when it is dry, and since the rooftop is exposed to a large amount of sunlight, the wind is strong and the evapotranspiration increases, so that The water stress of plants at times was unavoidable.

[0004]

Therefore, conventionally, as a tree for planting, while selecting a tree species that is strong against the above stress and has a strong growth, water is regularly supplied using a pump or the like to the soil. The amount of stored water was always kept constant, however, as mentioned above, excess water in the soil is quickly drained to avoid water leakage, so the amount of water in the soil is particularly high during dry weather. In order to maintain a constant water supply, it is necessary to supply a fairly large amount of water (tap water) to the rooftop continuously, so greening the rooftop involves a large economic burden and saves valuable water resources. There was a problem of wasting it.

Therefore, the technical problem of the present invention is that the water used for greening the roof is reused as middle water, and the reused wastewater is purified and reused for greening the roof again. It is to reduce wasteful use of water as much as possible while maintaining greening.

[0006]

[Means for Solving the Problems] Means taken in the present invention for solving the above technical problems are as follows.

In a system for forming a base soil for planting on the roof of a building such as a building and planting various trees on the base soil to green the roof,

(1) A structure in which a sand layer, a gravel layer, and a soil layer are stacked in order from the bottom inside a trench dug in the soil surface, and a perforated pipe for irrigating water into the gravel layer is installed. While constructing one or more water collection type trenches in the base soil constructed on the rooftop above, collect the water that has penetrated into the base soil from the water collection type trenches into the intermediate water tank and use it for each toilet in the building. It is configured to supply water as tap water, and after the wastewater of each of these toilets is purified by a sedimentation separation tank or a septic tank, it is circulated to the perforated pipe of the above-mentioned water collection type trench constructed on the base soil of the rooftop. To configure.

(2) On the roof of the building, there is provided a water collecting tank for collecting the purifying water that has permeated into the base soil through the water collecting trench, and the collected purifying water is also provided on the roof in this water collecting layer. Install a pump to feed the tap water tank.

(3) A pressure tank pump tank for pumping up the water purified by these sedimentation separation tanks or septic tanks to the roof of the building is connected to the sedimentation separation tanks or septic tanks for purifying the wastewater of each toilet. , On the roof of the building, install a water diversion tank to evenly distribute the pumped-up purified drainage water to each perforated pipe of multiple water collection type trenches constructed in the base soil.

[0011]

Each of the means described in (1), (2) and (3) above operates as follows.

According to the means described in (1) above, the water fed to the perforated pipe of the water collecting type trench infiltrates the surrounding gravel layer and then near the upper surface of the soil in which a large amount of soil microorganisms inhabit. Since it has an excellent purifying effect by being infiltrated by the capillaries, the trees planted on the roof can effectively absorb the purified water and grow, and it also rises by this capillary movement and then falls by gravity infiltration. Since the water is purified to a considerable level by the water collection trench and soil, it can be reused by directly supplying it to the toilet in the building as tap water. After purifying in the separation tank or the septic tank, it can be circulated again in the perforated pipe of the water collection type trench and reused, so that it can be effectively circulated without wasting tap water and the like. rooftop It makes it possible to significantly improve the reduction of the environment.

According to the means described in the above (2), the water for gravity infiltration into the basement soil on the roof is collected in the water collecting tank in a purified state, and then the water supply provided on the roof by the pump from here. Since it is sent to the tank and supplied to each toilet, the water for rooftop greening, which is originally drained as it is, can be equally distributed to each toilet as the purified purified tap water.

According to the means described in the above (3), the sewage discharged from each toilet is purified to some extent in the settling tank or the septic tank, and then pumped up from the pressure tank pump tank to the roof water diversion tank. Water is evenly supplied from the aquarium to the perforated pipes of a plurality of water collection type trenches installed in the base soil on the roof.
It will be possible to reuse again as water for rooftop greening.

As described above, the above-mentioned technical problems can be solved by the above-mentioned means, and the problems of the conventional art can be solved.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A preferred embodiment of the water supply / drainage treatment apparatus for rooftop greening system according to the present invention described above will be described in detail below with reference to the accompanying drawings.

FIG. 1 is an overall configuration diagram of a rooftop greening system provided with a water supply / drainage treatment device according to the present invention. In the figure, reference numeral 1 is a middle or high-rise building such as office building or condominium. 1T ... is a toilet (toilet) provided in each part of this building 1, 1Ta ... is a toilet provided in each toilet 1T, 2 is the roof of the building 1, 2G is a planting constructed on the roof 2F of this roof 2 For base soil, 2T ... is base soil 2G
A tree for rooftop greening, which is generally planted in, and is generally planted by selecting a tree species that is resistant to drought and has strong growth.

Further, the reference numeral 10 ... Shows a water collecting type trench constructed by digging a trench in the above-mentioned base soil 2G, the detailed structure of which will be described later.

Reference numeral 3 denotes a water collecting tank provided on one side of the rooftop 2. The water that has permeated into the base soil 2G by gravity is collected in a water collecting pipe 2a that is provided at the bottom of the base soil 2G and is collected in the water collecting tank 3. While being sent, the water WA collected in the water collection tank 3 is also supplied by the pump 3P to the water supply tank 3 provided on the roof 2 as well.
It is configured to be fed to T and to be freely supplied as water from the water supply tank 3T through the water supply pipe 4 and the branch pipes 4a to the toilet 1Ta ... Of each toilet 1T.

Numeral 5 is a toilet bowl 1Ta of each toilet 1T described above.
A drainage pipe for sending sewage discharged from ... to the sedimentation separation tank 6 and the septic tank 7 provided in the stratum GL or at other places, where WX and WY are water being purified in these tanks 6 and 7, respectively. Further, 8 is a pressure-feeding pump tank connected to the purification tank 7, and the purification water WZ fed into this pressure-feeding pump tank 8 is shown.
Is the roof 2 through the water supply pipe 8R by the pump 8P.
The water is sent to the water diversion tank 9 provided in the water diversion tank 9 and is circulated again from the water diversion tank 9 to the perforated pipes (described later) of the water collecting trenches 10 ...

Next, a specific structure of the above-mentioned water collection type trench 10 will be described based on the description of FIGS. 2 and 3.

FIG. 2 is a side sectional view for explaining the internal structure of the water collecting type trench 10, and FIG. 3 is a sectional view taken along the line XX of FIG. 2 in these drawings. 12 is a trench dug in the base soil 2G, 13 and 15 and 18
Is a sand layer, a gravel layer, and an improved soil layer, which are sequentially stacked from the bottom inside the groove 12, 14 is a capillary network interposed between the sand layer 13 and the gravel layer 15, and 17 is also the gravel layer 15 and the improved soil. The interstitial capillary network with layer 18 is shown.

Further, 16 is a perforated pipe for water infiltration arranged inside the gravel layer 15, and 19 is a water impermeable tank for preventing gravity permeation provided in the inner bottom portion of the groove 12 as described above. According to the water collecting type trench 10 configured as described above, the perforated pipe 16 is provided.
It is possible to purify the water (sewage) infiltrated into the gravel layer 15 to a high level by infiltrating the surface soil 2G in which soil microorganisms are present in a large amount and the surface side of the improved soil layer 18 by capillaries. Since it is possible, the water containing a large amount of nutrients can be absorbed by the roots of the tree 2T without contaminating the base soil 2G, and the excess water is further purified when gravity infiltrates into the base soil 2G. Since the water is collected in the lower water collection pipe 2a (see FIG. 1), it can be reused as it is as tap water.

In FIG. 2, 11a is a water supply pipe of the water diversion tank 9 described above, 11b is a sewage mass, and 11c is a filter net. Water is supplied to the perforated pipe 16 through the water supply pipe 11a, the sewage mass 11b, and the filter net 11c, but in some cases, the perforated pipe 16 is directly supplied from the water diversion tank 9 through the water supply pipe 11a.

Since the water supply / drainage treatment device for the rooftop greening system according to the present invention has the above-described structure, the perforated pipes 1 of the water collecting type trenches 10 provided in the basement soil 2G on the rooftop.
The water infiltrated from No. 6 is purified to a fairly high level by the capillary infiltration action of the water collection type trench 10, so that the water of high nutrition is absorbed into the roots of the trees 2T without polluting the base soil 2G. It can be grown.

Further, the excess water that is not absorbed by the roots of the trees 2T ... but permeates by gravity is further purified by passing through the layer of the base soil 2G, and can be used as it is as tap water. By collecting this in the water collecting tank 3 through the water collecting pipe 2a and sending it to the intermediate water tank 3T by the pump 3P, it can be reused for draining the toilet 1T.

Further, the sewage discharged from the above-mentioned toilet 1T is purified by the sedimentation separation tank 6 or the purification tank 7 and then pumped up to the roof water diversion tank 9 through the pressure pump pump tank 8 and then collected again. Since the water is circulated to the perforated pipes 16 of the trenches 10 ..., the water used for rooftop greening can be effectively reused without wasteful drainage, and the amount of tap water used can be increased. Can be reduced.

In the practice of the present invention, it is necessary to replenish new tap water little by little, and the replenishment place is usually the water supply pipe 8R, but in the case of replenishing the water diversion tank 9 as well. Therefore, its position is not limited.

[0029]

As described above, according to the water supply / drainage treatment apparatus for rooftop greening system according to the present invention, the water used for rooftop greening can be reused as it is for tap water without draining it to the toilet in the building. In addition, it is possible to effectively utilize the valuable water resources for recycling without wasteful drainage, and the water infiltrated into the base soil of the roof is purified to a considerable level by the water collection trench. , There is no concern that the base soil will be contaminated, it can be sanitarily reused for drainage of the toilet, and the water infiltrated into the base soil contains sufficient nutrients,
It has the advantage that it can directly contribute to the growth of trees, and its effect is extremely high.

[Brief description of drawings]

FIG. 1 is an overall configuration diagram showing an embodiment of a water supply / drainage treatment device for a rooftop greening system according to the present invention.

FIG. 2 is a side sectional view illustrating the structure of a water collection type trench used in the present invention.

3 is a cross-sectional view taken along line XX of FIG.

[Explanation of symbols]

 1 Building 1T Toilet 2 Rooftop 2G Base soil 2T Tree 2a Water collection pipe 3 Water collection tank 3P pump 3T Middle water tank 6 Sedimentation separation tank 7 Purification tank 8 Pressure pump tank 9 Water diversion tank 10 Water collection trench 12 Groove 13 Sand layer 15 Gravel layer 16 holes Perforated pipe 18 improved soil layer

─────────────────────────────────────────────────── ─── Continuation of the front page (51) Int.Cl. ⁶ Identification code Internal reference number FI Technical display area E03B 1/00 E03B 1/00 B E03F 3/02 E03F 3/02

Claims (3)

[Claims] 1. A system in which a base soil for planting is formed on the roof of a building such as a building, and various trees are planted on the base soil to green the roof, and a trench dug in the soil surface. A sand trap, a gravel layer, and a soil layer are stacked in order from the bottom inside, and a water collecting trench with a structure in which a perforated pipe for irrigating water into the gravel layer is piped is built on the roof above. While constructing one or more in the soil, the water that permeates into the base soil from the water collection type trench is collected in a water supply tank and is supplied to each toilet in the building as water supply. Water supply and drainage treatment for rooftop greening system, characterized in that after drainage of each toilet is purified in a sedimentation separation tank or septic tank, it is configured to circulate and supply water to the perforated pipe of the water collection type trench constructed in the base soil of the rooftop. apparatus. 2. A water collecting tank is provided on the roof of the building for collecting the cleaning water that has permeated into the base soil through the water collecting trench, and the collected cleaning water is also provided on the roof in this water collecting layer. The water supply / drainage treatment device for a rooftop greening system according to claim 1, further comprising a pump for feeding to the water supply tank. 3. A settling tank or a septic tank for purifying the wastewater of each toilet is connected to a pressure tank pump tank for pumping up the water purified by the settling separation tank or the septic tank to the roof of the building. A water diversion tank is provided on the roof of the building for supplying the purified water pumped up to the perforated pipes of a plurality of water collecting type trenches constructed in the base soil evenly. The water supply and drainage treatment device for the rooftop greening system described in 1.