JP2002004393A - Device for returning surface water to underground - Google Patents
Device for returning surface water to undergroundInfo
- Publication number
- JP2002004393A JP2002004393A JP2000192526A JP2000192526A JP2002004393A JP 2002004393 A JP2002004393 A JP 2002004393A JP 2000192526 A JP2000192526 A JP 2000192526A JP 2000192526 A JP2000192526 A JP 2000192526A JP 2002004393 A JP2002004393 A JP 2002004393A
- Authority
- JP
- Japan
- Prior art keywords
- water
- underground
- pipe
- pile
- permeable
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
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Abstract
Description
【0001】[0001]
【発明の属する技術分野】本発明は、例えば都市部や工
業地帯等における地下水が減少或いは枯渇した地下に雨
水や雪解け水等の地表水を還元し、地下環境の回復と地
表部の冠水防止を図った地表水の地下還元装置に関す
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention is intended to restore underground water such as rainwater and snowmelt to underground where underground water is reduced or depleted in, for example, an urban area or an industrial area, thereby recovering the underground environment and preventing flooding of the surface. It relates to a planned underground water reduction device for surface water.
【0002】[0002]
【従来の技術】都市部では、道路等の地表部はアスファ
ルトやコンクリートで舗装されているので、雨水や雪解
け水等の地表水は地下に浸透することができない。従っ
て、例えば雨季における大量の雨水にあっては、これを
下水設備や河川に排水することによって処理することで
地表部の冠水を防止していた。その結果、地下水が減少
或いは枯渇してしまい、これが地盤沈下,地中温度の上
昇及び植物等の育成環境の破壊を招くといった諸問題点
があった。2. Description of the Related Art In urban areas, the surface of roads and the like is paved with asphalt and concrete, so that surface water such as rainwater and snowmelt cannot penetrate underground. Therefore, for example, in the case of a large amount of rainwater in the rainy season, the inundation of the ground surface is prevented by treating the wastewater by draining it to a sewage system or a river. As a result, groundwater is reduced or depleted, which causes various problems such as land subsidence, increase in underground temperature, and destruction of a breeding environment for plants and the like.
【0003】そこで、特開昭57−77737号公報に
は、図6及び図7に示すような通水用側溝100が提案
されている。この通水用側溝100は、U字溝110の
底部に通水用パイル120の上端部を連結し、該通水用
パイル120の下端部を本来地下水脈であった自由地下
水帯水層(第一透水層)Bに到達させ、前記U字溝11
0内に流入した雨水等の地表水を前記通水用パイル12
0を介して第一透水層Bに還元するようにした構成の発
明である。Therefore, Japanese Patent Laying-Open No. 57-77737 proposes a water passage side groove 100 as shown in FIGS. The water passage side groove 100 connects the upper end of the water passage pile 120 to the bottom of the U-shaped groove 110, and connects the lower end of the water passage pile 120 to the free groundwater aquifer (first (One permeable layer) B, and the U-shaped groove 11
Surface water such as rainwater that has flowed into the
This is an invention having a configuration in which the first water-permeable layer B is reduced to the first water-permeable layer B through the zero.
【0004】[0004]
【発明が解決しようとする課題】しかし、前記特開昭5
7−77737号公報に開示された通水用側溝100で
は、地表水を第一透水層Bのみに還元する構成としてい
るので、この第一透水層Bの地下水が飽和状態になると
地表水をそれ以上は第一透水層Bに排水できないという
問題があった。また、第一透水層Bの地下水が飽和状態
になった後、さらに降雨が続いた場合などには、U字溝
110から下水設備や河川への排水が間に合わず、地表
部Aが冠水してしまうという問題もあった。However, the above-mentioned Japanese Patent Application Laid-Open No.
In the gutter 100 for water passage disclosed in Japanese Patent Application Laid-Open No. 7-77737, the surface water is reduced to only the first permeable layer B. Therefore, when the groundwater in the first permeable layer B becomes saturated, the surface water is removed. As described above, there is a problem that the water cannot be drained to the first permeable layer B. Further, when the groundwater in the first permeable layer B becomes saturated and the rainfall continues further, the drainage from the U-shaped groove 110 to the sewage system or the river cannot be made in time, and the ground surface A is flooded. There was also the problem of getting lost.
【0005】本発明は、上記の問題点に鑑みてなされた
もので、地下水が不足或いは枯渇した都市部の地下に大
量の地表水を還元することができ、地下環境の回復と地
表部の冠水防止のみならず、下水設備の負担軽減と河川
の氾濫防止を図ることができる地表水の地下還元装置を
提供することを目的としたものである。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and is capable of returning a large amount of surface water to an underground in an urban area where groundwater is insufficient or depleted, thereby restoring the underground environment and flooding the surface. It is an object of the present invention to provide an underground water recirculation device that can reduce not only the burden on sewage facilities but also the prevention of flooding of rivers, as well as prevention.
【0006】[0006]
【課題を解決するための手段】前記の目的を達成するた
め、本発明の要旨は、地表から地中へ向け透水層と不透
水層が交互に連続する地盤において、雨水等の地表水を
地下に還元する装置であって、前記地盤の地表部近傍に
埋設され、前記地表水が流入する上方開口部を形成する
側壁及び前記地表水の流出孔を形成した底壁からなる集
水部材と、該集水部材の流出孔に上端開口部を連結した
中空杭であり、前記地盤の第一透水層と不透水層を貫通
して少なくとも第二透水層に到達し、且つ少なくとも前
記第一及び第二透水層にそれぞれ対応する杭周壁に透水
性を持たせた落水管と、該落水管に排水される前記地表
水を浄化する上部フィルタと、前記落水管内の水圧が大
気圧以上となったときにのみ閉じる逆止弁とを備えたこ
とを特徴とする地表水の地下還元装置等にある。SUMMARY OF THE INVENTION In order to achieve the above object, the gist of the present invention is to provide a method in which surface water, such as rainwater, flows underground in a ground where a permeable layer and an impervious layer alternate from the surface to the ground. A water collecting member buried in the vicinity of the ground surface of the ground, and formed of a side wall forming an upper opening through which the surface water flows and a bottom wall forming an outflow hole of the surface water, A hollow pile in which an upper end opening is connected to an outflow hole of the water collecting member, penetrates the first permeable layer and the impermeable layer of the ground, reaches at least the second permeable layer, and at least the first and second permeable layers. A waterfall pipe having water permeability on the pile peripheral wall corresponding to each of the two water-permeable layers, an upper filter for purifying the surface water drained to the waterfall pipe, and only when the water pressure in the waterfall pipe becomes higher than the atmospheric pressure. A ground characterized by having a check valve for closing In the basement reduction device, and the like of the water.
【0007】[0007]
【発明の実施の形態】以下、本発明の一実施形態に係る
地表水の地下還元装置を図面を参照しつつ説明すると、
図1乃至図3において、1は本実施形態に係る地表水の
地下還元装置で、該地下還元装置1は主として、集水部
材10,落水管20,上部フィルタ40及び逆止弁50
などから構成されている。BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, an underground water reduction apparatus according to an embodiment of the present invention will be described with reference to the drawings.
1 to 3, reference numeral 1 denotes a surface water underground reduction device according to the present embodiment, and the underground reduction device 1 mainly includes a water collecting member 10, a water pipe 20, an upper filter 40, and a check valve 50.
It is composed of
【0008】10は集水部材で、本実施形態ではコンク
リート製の水路ブロックであり、地表水が流入する上方
開口部11aを形成する一対の側壁11,11と、前記
地表水の流出孔12aを形成した底壁12とから構成さ
れており、この水路ブロック10を地盤の地表部S近傍
に複数個連結した状態で埋設することにより、その下流
側が下水設備や河川に通じる水路を形成した構成となっ
ている。Reference numeral 10 denotes a water collecting member, which in this embodiment is a concrete waterway block. The water collecting member includes a pair of side walls 11, 11 forming an upper opening 11a into which surface water flows, and a surface water outflow hole 12a. A plurality of the waterway blocks 10 are buried in a connected state in the vicinity of the surface S of the ground, so that the downstream side forms a waterway leading to a sewage system or a river. Has become.
【0009】20は落水管で、中空杭で形成されてお
り、該中空杭20の上端部は、前記水路ブロック10の
流出孔12a内に挿入して前記底壁12と連結され、そ
の上端開口部20Aは前記水路ブロック10内に位置し
ている。また、下端部は、毛管層Aと自由地下水帯水層
(第一透水層)B及び上部賦圧層(第一不透水層)Cを
それぞれ貫通して被圧地下水帯水層(第二透水層)Dに
到達しており、この中空杭20の前記第一透水層B及び
第二透水層Dに位置する杭周壁には透水性を持たせた構
成としてある。なお、図中20Bは前記中空杭20の下
端閉塞部である。Reference numeral 20 denotes a waterfall pipe, which is formed by a hollow pile. The upper end of the hollow pile 20 is inserted into the outflow hole 12a of the waterway block 10 and connected to the bottom wall 12, and the upper end opening is formed. 20A is located in the waterway block 10. Further, the lower end portion penetrates through the capillary layer A, the free groundwater aquifer (first permeable layer) B, and the upper pressurized layer (first impermeable layer) C, respectively, so as to pressurize the groundwater aquifer (second permeable layer). Layer D), and the pile peripheral wall of the hollow pile 20 located at the first water permeable layer B and the second water permeable layer D is configured to have water permeability. In the drawing, reference numeral 20B denotes a lower end closed portion of the hollow pile 20.
【0010】具体的には、この落水管20は、不透水性
のコンクリート製中空杭21と、透水性を有するポーラ
スコンクリート製の中空杭22A,22Bとを交互に無
溶接継手30を介して連結した構成のもので、前記不透
水性のコンクリート製中空杭21は毛管帯A及び第一不
透水層Cに、またポーラスコンクリート製の中空杭22
A及び22Bは第一透水層B及び第二透水層Dにそれぞ
れ位置するように対応させてある。なお、図中Eは下部
賦圧層(第二不透水層)である。More specifically, the water pipe 20 is formed by alternately connecting a water-impermeable concrete hollow pile 21 and a water-permeable porous concrete hollow pile 22A, 22B via a weldless joint 30. The hollow pile 21 made of water-impermeable concrete is provided in the capillary zone A and the first water-impermeable layer C, and the hollow pile 22 made of porous concrete.
A and 22B correspond to the first permeable layer B and the second permeable layer D, respectively. In addition, E in the figure is a lower pressure layer (second impermeable layer).
【0011】30は無溶接継手で、図4に示すように、
各中空杭21,22A,22Bの端板21a,22aを
挟持する内方突起31bを有する二つ割りの内リング3
1,31と、この内リング31を外側から拘束する環状
の外リング32とから構成されており、これらの内リン
グ31の外面と外リング32の内面には互いに反対方向
に傾斜するテーパ面31a,32aがそれぞれ形成さて
いるとゝもに、各テーパ面31a,32aには互いに噛
み合う凹凸溝が形成してある。Reference numeral 30 denotes a non-welded joint, as shown in FIG.
A split inner ring 3 having an inward projection 31b for sandwiching the end plates 21a, 22a of the hollow piles 21, 22, A, 22B.
1, 31 and an annular outer ring 32 for restraining the inner ring 31 from the outside. The outer surface of the inner ring 31 and the inner surface of the outer ring 32 have tapered surfaces 31a inclined in opposite directions. , 32a are formed respectively, and concavo-convex grooves that mesh with each other are formed in the respective tapered surfaces 31a, 32a.
【0012】40は上部フィルタで、本実施形態では半
球状の金網で構成されており、後述する逆止弁50の上
部に着脱自在に取り付けられていて、前記落水管20内
に排水される地表水に含まれる土砂やゴミ等を除去し、
地下水の汚染防止を図るためのものである。したがっ
て、形状や材質は特に限定されるものではない。Reference numeral 40 denotes an upper filter, which in the present embodiment is constituted by a hemispherical wire mesh, is removably attached to an upper part of a check valve 50 described later, and is a surface water drained into the drain pipe 20. To remove earth and sand, trash, etc.
This is to prevent groundwater pollution. Therefore, the shape and the material are not particularly limited.
【0013】50は逆止弁で、図3に示すように、前記
落水管20の上端開口部20Aに着脱可能となるように
取り付けてあり、該落水管20内の水圧が大気圧以上と
なったときにのみ閉じることにより、落水管20内から
集水部材10への水の逆流を防止するためのものであ
り、この逆止弁50は本体部51と弁体部55から主に
構成されている。Reference numeral 50 denotes a check valve, which is detachably attached to the upper end opening 20A of the water pipe 20, as shown in FIG. 3, when the water pressure in the water pipe 20 becomes higher than the atmospheric pressure. The check valve 50 is mainly constituted by a main body 51 and a valve body 55 by preventing backflow of water from inside the waterfall pipe 20 to the water collecting member 10.
【0014】詳述すると、図3において、51は本体部
で、前記落水管20の外径とほゞ同径の外径を有する大
径円筒部51aと、該大径円筒部51aの下部に連成し
たこれよりも小径の小径円筒部51bで構成されてお
り、該小径円筒部51bの下端開口部51cの内周面は
逆ロート状に形成されている。More specifically, in FIG. 3, reference numeral 51 denotes a main body which is connected to a large-diameter cylindrical portion 51a having an outer diameter substantially equal to the outer diameter of the water-fall pipe 20, and a lower portion of the large-diameter cylindrical portion 51a. The small-diameter cylindrical portion 51b has a smaller diameter than that of the small-diameter cylindrical portion 51b, and the inner peripheral surface of the lower end opening 51c of the small-diameter cylindrical portion 51b is formed in an inverted funnel shape.
【0015】55は弁体部で、前記小径円筒部51bの
下端開口部51cと断面が同一形状の逆ロート状の弁5
5aと、該弁55aの上端から上方へ延びるシャフト5
5bとから構成されており、該シャフト55bの上端は
後述する透水板52の中心に形成した挿通孔を遊貫する
とゝもに、ねじ部にナット(ストッパー)54を螺合せ
しめることにより、前記透水板52に装着されている。Numeral 55 denotes a valve body which is an inverted funnel-shaped valve 5 having the same cross section as the lower end opening 51c of the small diameter cylindrical portion 51b.
5a and a shaft 5 extending upward from the upper end of the valve 55a
5b. The upper end of the shaft 55b passes through an insertion hole formed in the center of the water-permeable plate 52, which will be described later, and the nut (stopper) 54 is screwed into the threaded portion. It is attached to the water permeable plate 52.
【0016】したがって、この弁体部55は、本体部5
1を構成する前記小径円筒部51bの垂直中心軸に沿っ
て上下動自在であり、常態ではその自重により下動して
実線で示す状態にあり、前記落水管20内の水圧が大気
圧以上となった時に前記弁体55が上動して弁55aの
外周面と前記小径円筒部51bの下端開口部51cの内
周面とが密着し、該下端開口部51cを弁55aで閉塞
する逆止弁として機能することになる。Accordingly, the valve body 55 is
1 is vertically movable along the vertical center axis of the small-diameter cylindrical portion 51b, and normally moves down by its own weight and is in a state shown by a solid line, and the water pressure in the water-falling pipe 20 becomes equal to or higher than the atmospheric pressure. When the valve body 55 moves upward, the outer peripheral surface of the valve 55a and the inner peripheral surface of the lower end opening 51c of the small diameter cylindrical portion 51b come into close contact with each other, and the lower end opening 51c is closed by the valve 55a. Will function as
【0017】52は透水板で、前記大径円筒部51aの
上端開口部内に落とし込んで設置されており、該透水板
52には多数の透水孔52aが穿設されている。なお、
本実施形態では、地表水の排水口となる逆止弁50の上
部を、水路ブロック10の底壁12より上に突出させた
構成としてある。この構成により、前記水路ブロック1
0内に流れ込んだ地表水中の土砂等を底壁12上に沈殿
せしめ、この沈殿物を水路ブロック10内を流下する水
流によって流下させ、土砂等の混入が少ない水を前記上
部フィルタ40,透水板52でそれぞれ濾過した後、逆
止弁50を介して落水管20内に流し込むようになって
いる。Numeral 52 denotes a water permeable plate which is installed by being dropped into the upper end opening of the large-diameter cylindrical portion 51a. The water permeable plate 52 has a large number of water permeable holes 52a. In addition,
In this embodiment, the upper part of the check valve 50 serving as the drainage of surface water is configured to protrude above the bottom wall 12 of the waterway block 10. With this configuration, the waterway block 1
The sediment and the like in the surface water that has flowed into the surface water is settled on the bottom wall 12, and the sediment is caused to flow down by the water flow flowing down the waterway block 10. After each filtration at 52, the water is poured into the water pipe 20 via the check valve 50.
【0018】次に、本実施形態に係る地表水の地下還元
装置1の作用について説明する。例えば、雨季等におけ
る大量の雨水(地表水)は地表部Sから水路ブロック1
0内に流れ込み、水路内を流下する。この間にあって、
水路ブロック10内を流れる雨水の水位が逆止弁50の
突出高さより上昇したとき、雨水は上部フィルタ40及
び逆止弁50を介して落水管20内に排水される。Next, the operation of the underground water reduction apparatus 1 according to the present embodiment will be described. For example, a large amount of rainwater (surface water) in the rainy season or the like is transmitted from the surface portion S to the waterway block 1.
It flows into 0 and flows down in the water channel. During this time,
When the level of the rainwater flowing in the waterway block 10 rises above the check height of the check valve 50, the rainwater is drained into the drain pipe 20 via the upper filter 40 and the check valve 50.
【0019】落水管20内に排水された雨水は、該落水
管20の下部のポーラスコンクリート製中空杭22Bの
透水性を有するその杭周壁を介して第二透水層Dに、ま
た、前記落水管20の中部のポーラスコンクリート製中
空杭22Aの透水性を有するその杭周壁を介して第一透
水層Bにそれぞれ還元される。そして、この還元水は透
水性の良い前記第一透水層B及び第二透水層Dを通って
その側方に流動し、第一透水層Bにあっては自由地下水
となり、第二透水層Dにあっては被圧地下水となる。The rainwater drained into the waterfall pipe 20 passes through the porous concrete hollow pile 22B below the waterfall pipe 20 to the second water permeable layer D via the permeable peripheral wall of the pile and the middle part of the waterfall pipe 20. The porous concrete hollow pile 22A is reduced to the first permeable layer B via the pile peripheral wall having water permeability. The reduced water flows to the side through the first water permeable layer B and the second water permeable layer D having good water permeability, and becomes free groundwater in the first water permeable layer B. In this area, it becomes confined groundwater.
【0020】ここで、前記第一透水層B及び第二透水層
Dの自由地下水及び被圧地下水が飽和状態となる場合が
あり、特に、第二透水層Dの被圧地下水が飽和状態とな
った場合にはこの被圧地下水が落水管20を逆流し、該
落水管20内から水路ブロック10内へ溢水することも
考えられる。このような場合には、この逆流水により前
記逆止弁50を構成する弁体部55の弁55aが下方か
ら上方へ押圧され、図3の矢印で示すように、実線で示
す状態から鎖線で示す状態へ上動する。Here, the free groundwater and the confined groundwater in the first permeable layer B and the second permeable layer D may become saturated, and in particular, the confined groundwater in the second permeable layer D becomes saturated. In this case, it is conceivable that the pressurized groundwater flows backward through the waterfall pipe 20 and overflows from inside the waterfall pipe 20 into the waterway block 10. In such a case, the valve 55a of the valve body portion 55 constituting the check valve 50 is pressed upward from below by the backflow water, and as shown by the arrow in FIG. Move up to the state shown.
【0021】その結果、弁55aの外周面と前記小径円
筒部51bの下端開口部51cの内周面とが密着し、該
下端開口部51cが弁55aで閉塞され、落水管20内
から集水部材10への水の逆流が防止される。その後、
前記第一透水層B,第二透水層Dの地下水が不足又は枯
渇した場合には、弁55aに対する上方への押圧力が解
除されてその自重により図3の実線で示す状態に下動
し、水路ブロック10から落水管20内への雨水の排水
が再開される。As a result, the outer peripheral surface of the valve 55a and the inner peripheral surface of the lower end opening 51c of the small-diameter cylindrical portion 51b come into close contact with each other, and the lower end opening 51c is closed by the valve 55a. Backflow of water to 10 is prevented. afterwards,
When the groundwater in the first permeable layer B and the second permeable layer D is insufficient or depleted, the upward pressing force on the valve 55a is released, and the valve 55a moves down to the state shown by the solid line in FIG. Drainage of rainwater from the waterway block 10 into the water pipe 20 is restarted.
【0022】図5に示すものは、前記落水管20の他実
形態のものである。同図において、60は前記地表部S
近傍から第二透水層Dに到達する長さを有する下端が閉
塞された節付中空杭で、全体が不透水性の普通コンクリ
ートで形成されており、節部61と杭周壁62とが交互
に繰り返し連続する構造のものである。FIG. 5 shows another embodiment of the water pipe 20. In the figure, reference numeral 60 denotes the ground surface S
A hollow pile with a closed end having a length that reaches the second permeable layer D from the vicinity, is entirely formed of impervious ordinary concrete, and the nodes 61 and the pile peripheral wall 62 are alternately formed. It has a structure that is repeated continuously.
【0023】そして、この節付中空杭60の前記第一透
水層B及び第二透水層Dと対応する位置に設置される前
記杭周壁62には、それぞれ多数の透水孔62aが穿設
されていて透水性が付与されているとゝもに、該透水孔
62aを穿設した杭周壁62の外周面を下部フィルタ6
3により覆った構成としている。なお、この下部フィル
タ63の外径は前記節部61の外径より小さくなるよう
に形成することが望ましく、これによって、節付中空杭
60の搬送時及び地中への設置時における下部フィルタ
63の損傷を防止することができる。The pile peripheral wall 62 installed at a position corresponding to the first water permeable layer B and the second water permeable layer D of the knotted hollow pile 60 has a large number of water permeable holes 62a. When the water permeability is given, the outer peripheral surface of the pile peripheral wall 62 in which the water permeation hole 62a is formed is attached to the lower filter 6.
3. The outer diameter of the lower filter 63 is desirably formed to be smaller than the outer diameter of the knot portion 61. Damage can be prevented.
【0024】また、上記実施形態では、集水部材10と
して、対向する一対の側壁11,11と底壁12とから
なるコンクリート製の水路ブロックとしたが、水路ブロ
ックに限らず、四方の側壁と底壁からなる枡ブロックで
あっても本発明の目的は達成することができる。なお、
本発明装置のメンテナンス時には、フィルタ40ととも
に逆止弁50を落水管20の上端開口部20Aから取り
外し、該落水管20内に挿入した図示しないロッドから
ジェット水流を噴出させて、該落水管20内を容易に洗
浄することができる。In the above embodiment, the water collecting member 10 is a concrete waterway block composed of a pair of opposed side walls 11, 11 and a bottom wall 12. However, the water collecting member 10 is not limited to the waterway block. The object of the present invention can be achieved even with a square block having a bottom wall. In addition,
At the time of maintenance of the device of the present invention, the check valve 50 is removed together with the filter 40 from the upper end opening 20A of the water drop pipe 20, and a jet water stream is jetted from a rod (not shown) inserted into the water drop pipe 20, so that the inside of the water drop pipe 20 is easily formed. Can be washed.
【0025】このような本実施形態の地表水の地下還元
装置1によれば、落水管20の第一透水層B及び第二透
水層Dに対応する部分に透水性を持たせたことにより、
地下水が減少或いは枯渇した上記透水層B,Dに大量の
地表水を還元することができる。これによって、地盤沈
下や地下環境の回復を図ることができるとゝもに、大量
の降雨が続いた場合でも下水設備の負担軽減と河川の氾
濫防止を図ることができ、地表部Sの冠水を確実に防止
することができる。According to the underground water reduction apparatus 1 of the present embodiment as described above, the portion of the waterfall pipe 20 corresponding to the first permeable layer B and the second permeable layer D has water permeability.
A large amount of surface water can be reduced to the permeable layers B and D whose groundwater has been reduced or depleted. As a result, land subsidence and the recovery of the underground environment can be achieved, and even if heavy rainfall continues, the burden on sewerage facilities can be reduced and flooding of rivers can be prevented. It can be reliably prevented.
【0026】また、第二透水層Dに還元した地下水が不
透水層(上部賦圧層)Cに被圧されて飽和状態となった
場合でも、該被圧地下水の落水管20を介しての逆流を
逆止弁50によって確実に防止することができ、該地下
水の逆流による地表部Sの冠水を防止することもでき
る。Further, even if the groundwater reduced to the second permeable layer D is pressurized by the impermeable layer (upper pressurized layer) C and becomes saturated, the backflow of the pressurized groundwater through the drainage pipe 20 is performed. Can be reliably prevented by the check valve 50, and flooding of the ground surface S due to the backflow of the groundwater can also be prevented.
【0027】[0027]
【発明の効果】本発明に係る地表水の地下還元装置は、
上記のような構成であるから、地下水の減少或いは枯渇
した都市部の地下にあっては大量の地表水を還元するこ
とができ、地下環境の回復と地表部の冠水防止のみなら
ず、下水設備の負担軽減と河川の氾濫防止を図ることが
できる、といった諸効果がある。The underground water reduction apparatus according to the present invention has the following features.
With the above configuration, a large amount of surface water can be returned underground in an urban area where the groundwater has been reduced or depleted, and not only the restoration of the underground environment and prevention of flooding of the surface, but also sewage facilities This has the effect of reducing the burden on the river and preventing flooding of the river.
【図1】本発明の一実施形態に係る地表水の地下還元装
置を示す斜視図である。FIG. 1 is a perspective view showing a surface water underground reduction device according to an embodiment of the present invention.
【図2】同装置の施工状態を示す縦断面説明図である。FIG. 2 is an explanatory longitudinal sectional view showing a construction state of the apparatus.
【図3】同装置の要部を示す部分拡大断面図である。FIG. 3 is a partially enlarged sectional view showing a main part of the device.
【図4】同装置における落水管の連結部分を示す半部断
面拡大図である。FIG. 4 is an enlarged half-sectional view showing a connection part of a water pipe in the apparatus.
【図5】落水管の他の実施形態を示す半部断面図であ
る。FIG. 5 is a half sectional view showing another embodiment of a water pipe.
【図6】従来の通水用側溝を示す斜視図である。FIG. 6 is a perspective view showing a conventional water passage groove.
【図7】同通水用側溝の施工状態を示す縦断面図であ
る。FIG. 7 is a longitudinal sectional view showing a construction state of the water passage gutter.
1 地表水の地下還元装置 10 集水部材 11 側壁 11a 上方開口部 12 底壁 12a 流出孔 20 落水管 20A 上端開口部 20B 下端閉塞部 21 コンクリート製中空杭 22A,22B ポーラスコンクリート製中空杭 40 上部フィルタ 50 逆止弁 51 本体部 52 透水板 52a 透水孔 55 弁体部 55a 弁 55b シャフト 60 節付中空杭 61 節部 62 杭周壁 62a 透水孔 63 下部フィルタ DESCRIPTION OF REFERENCE NUMERALS 1 Surface water underground reduction device 10 Water collecting member 11 Side wall 11a Upper opening 12 Bottom wall 12a Outlet hole 20 Dropping pipe 20A Upper opening 20B Lower closing 21 Concrete hollow pile 22A, 22B Porous concrete hollow pile 40 Upper filter 50 Check valve 51 Main body 52 Water permeable plate 52a Water permeable hole 55 Valve body 55a Valve 55b Shaft 60 Knotted hollow pile 61 Knot 62 Pile peripheral wall 62a Water permeable hole 63 Lower filter
Claims (8)
交互に連続する地盤において、雨水等の地表水を地下に
還元する装置であって、 前記地盤の地表部近傍に埋設され、前記地表水が流入す
る上方開口部を形成する側壁及び前記地表水の流出孔を
形成した底壁からなる集水部材と、 該集水部材の流出孔に上端開口部を連結した中空杭であ
り、前記地盤の第一透水層と不透水層を貫通して少なく
とも第二透水層に到達し、且つ少なくとも前記第一及び
第二透水層にそれぞれ対応する杭周壁に透水性を持たせ
た落水管と、 該落水管に排水される前記地表水を浄化する上部フィル
タと、 前記落水管内の水圧が大気圧以上となったときにのみ閉
じる逆止弁とを備えたことを特徴とする地表水の地下還
元装置。1. A device for reducing surface water, such as rainwater, to the underground in a ground where a permeable layer and an impermeable layer are alternately continuous from the ground to the ground, wherein the device is buried near the surface of the ground, A water collecting member comprising a side wall forming an upper opening into which the surface water flows and a bottom wall forming an outflow hole for the surface water, and a hollow pile having an upper end opening connected to the outflow hole of the water collecting member. A drain pipe that penetrates the first permeable layer and the impermeable layer of the ground, reaches at least the second permeable layer, and has water permeability on at least the pile peripheral wall corresponding to the first and second permeable layers, An upper filter for purifying the surface water discharged to the waterfall pipe, and a check valve that closes only when the water pressure in the waterfall pipe becomes equal to or higher than the atmospheric pressure. apparatus.
なるコンクリート製の枡ブロックとしたことを特徴とす
る請求項1記載の地表水の地下還元装置。2. The underground water reduction apparatus according to claim 1, wherein the water collecting member is a concrete block made of four sides and a bottom wall.
底壁からなるコンクリート製の水路ブロックとし、該水
路ブロックを複数連結させて水路を形成したことを特徴
とする請求項1記載の地表水の地下還元装置。3. The water collecting member according to claim 1, wherein the water collecting member is a concrete waterway block including a pair of opposed side walls and a bottom wall, and a plurality of the waterway blocks are connected to form a waterway. Underground reduction device for surface water.
コンクリート製の中空杭と、不透水性のコンクリート製
中空杭とを連結した構成としたことを特徴とする請求項
1,2又は3記載の地表水の地下還元装置。4. The waterfall pipe according to claim 1, wherein the hollow pipe made of porous concrete having water permeability and the hollow pile made of water-impermeable concrete are connected to each other. Underground reduction device for surface water.
空杭とし、該節付中空杭の前記第一及び第二透水層にそ
れぞれ対応する節間の杭周壁に多数の透水孔を穿設する
とゝもに、該杭周壁の外周面を下部フィルタで覆った構
成としたことを特徴とする請求項1,2又は3記載の地
表水の地下還元装置。5. The method according to claim 1, wherein the water pipe is a hollow knotted pile made of concrete, and a large number of water-permeable holes are formed in a pile peripheral wall between the knots corresponding to the first and second permeable layers of the hollow knotted pile. 4. The underground water reduction apparatus according to claim 1, wherein the outer peripheral surface of the pile peripheral wall is covered with a lower filter.
付中空杭の節の外径より小さく形成したことを特徴とす
る請求項5記載の地表水の地下還元装置。6. The underground water reduction apparatus according to claim 5, wherein the lower filter has an outer diameter smaller than an outer diameter of a knot of the hollow peg.
を閉塞した状態で設置される大径円筒部の下部に逆ロー
ト状の内周面を有する小径円筒部を連成した本体部と、
該本体部の前記小径円筒部内を上下動可能となるように
設置した逆ロート状の弁体部とからなり、前記落水管内
の水圧が大気圧以上となった時に前記弁体部の弁が上動
して、前記小径円筒部を閉塞する構成としたことを特徴
とする請求項1,2,3,4,5又は6記載の地表水の
地下還元装置。7. A main body in which the check valve is coupled to a small-diameter cylindrical portion having an inverted funnel-shaped inner peripheral surface at a lower portion of a large-diameter cylindrical portion installed with the upper end opening of the water-fall pipe closed. When,
An inverted funnel-shaped valve body installed so as to be able to move up and down in the small-diameter cylindrical portion of the main body, and when the water pressure in the water-falling pipe becomes higher than the atmospheric pressure, the valve of the valve body is raised. The underground water reduction device according to claim 1, 2, 3, 4, 5, or 6, wherein the small diameter cylindrical portion is closed by moving.
水管の上端開口部に着脱自在となるように設置したこと
を特徴とする請求項1,2,3,4,5,6又は7記載
の地表水の地下還元装置。8. The system according to claim 1, wherein the check valve and the upper filter are detachably mounted on an upper end opening of the water pipe. Underground water reduction equipment for surface water.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000192526A JP2002004393A (en) | 2000-06-27 | 2000-06-27 | Device for returning surface water to underground |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP2000192526A JP2002004393A (en) | 2000-06-27 | 2000-06-27 | Device for returning surface water to underground |
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Publication Number | Publication Date |
---|---|
JP2002004393A true JP2002004393A (en) | 2002-01-09 |
Family
ID=18691645
Family Applications (1)
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JP2000192526A Pending JP2002004393A (en) | 2000-06-27 | 2000-06-27 | Device for returning surface water to underground |
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JP (1) | JP2002004393A (en) |
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JP2007032048A (en) * | 2005-07-26 | 2007-02-08 | Daishin Sangyo:Kk | Box culvert and water passage structure |
JP2007177488A (en) * | 2005-12-27 | 2007-07-12 | Daido Concrete Co Ltd | Permeable tube embedding method and work machine for use therein |
JP2008150809A (en) * | 2006-12-15 | 2008-07-03 | Keiyo Maruzen:Kk | Rainwater permeation institution |
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2000
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JP2007032048A (en) * | 2005-07-26 | 2007-02-08 | Daishin Sangyo:Kk | Box culvert and water passage structure |
JP4590323B2 (en) * | 2005-07-26 | 2010-12-01 | 株式会社 大伸産業 | Waterway structure |
JP2007177488A (en) * | 2005-12-27 | 2007-07-12 | Daido Concrete Co Ltd | Permeable tube embedding method and work machine for use therein |
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JP2008150809A (en) * | 2006-12-15 | 2008-07-03 | Keiyo Maruzen:Kk | Rainwater permeation institution |
JP2008214859A (en) * | 2007-02-28 | 2008-09-18 | Yamakoshi:Kk | Rainwater seepage pit, and construction method for changing existing rainwater pit into rainwater seepage pit |
JP2009108595A (en) * | 2007-10-30 | 2009-05-21 | Sekisui Chem Co Ltd | Bottom plate structure of storage and penetration tank, and underground embedded type storage and penetration system including bottom plate structure |
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