JP2008014108A - Water collecting pipe for well - Google Patents
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- JP2008014108A JP2008014108A JP2006189327A JP2006189327A JP2008014108A JP 2008014108 A JP2008014108 A JP 2008014108A JP 2006189327 A JP2006189327 A JP 2006189327A JP 2006189327 A JP2006189327 A JP 2006189327A JP 2008014108 A JP2008014108 A JP 2008014108A
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- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims abstract description 76
- 238000000926 separation method Methods 0.000 claims description 26
- 229910000831 Steel Inorganic materials 0.000 abstract description 6
- 239000010959 steel Substances 0.000 abstract description 6
- 230000006837 decompression Effects 0.000 abstract description 5
- 238000009434 installation Methods 0.000 abstract description 5
- 238000005325 percolation Methods 0.000 abstract 1
- 239000003673 groundwater Substances 0.000 description 27
- 238000005086 pumping Methods 0.000 description 9
- 238000007789 sealing Methods 0.000 description 6
- 230000007423 decrease Effects 0.000 description 4
- 230000000694 effects Effects 0.000 description 4
- 239000007788 liquid Substances 0.000 description 2
- 238000004519 manufacturing process Methods 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 230000002093 peripheral effect Effects 0.000 description 2
- 239000012466 permeate Substances 0.000 description 2
- 239000002349 well water Substances 0.000 description 2
- 235000020681 well water Nutrition 0.000 description 2
- 238000004804 winding Methods 0.000 description 2
- 238000009412 basement excavation Methods 0.000 description 1
- 238000004891 communication Methods 0.000 description 1
- 239000011162 core material Substances 0.000 description 1
- 230000003247 decreasing effect Effects 0.000 description 1
- 238000002347 injection Methods 0.000 description 1
- 239000007924 injection Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 239000002689 soil Substances 0.000 description 1
- 238000005406 washing Methods 0.000 description 1
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02A—TECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
- Y02A20/00—Water conservation; Efficient water supply; Efficient water use
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- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
Abstract
Description
本願発明は、内部に地下水を貯留する井戸用集水管の分野に属し、特に揚水による貯留量の減少を集水機能の向上により抑制可能な井戸用集水管に関する。 The present invention belongs to the field of water collecting pipes for wells that store groundwater therein, and particularly relates to water collecting pipes for wells that can suppress a decrease in the amount of storage due to pumping by improving the water collecting function.
従来より、地下水の利用方法の一つとして井戸を設置する方法が用いられてきた。この井戸の一般的な構造としては、地下水の豊富な土中の帯水層を探索してボーリングし、このボーリング孔の周縁を通水可能な部材によりケーシングしたり、またはボーリング孔の内部に通水口を側面に開設した集水管又は取水管を配設するものであった。 Conventionally, a method of installing a well has been used as one of the utilization methods of groundwater. The general structure of this well is to search for aquifers in the soil rich in groundwater and to drill, and then casing the periphery of the borehole with a member that can pass water, or pass through the borehole. A water collecting pipe or a water intake pipe having a water inlet on the side surface was disposed.
かかる集水管9は、主に図3に示す構成である。すなわち、地中に立設状に埋設すると共に帯水層Lに下部側が到達する管体であって、特に下部側の側面に地下水を通水可能とする通水口91を開設しており、必要により有底構成としている。集水管9の内部に貯留した地下水Wは、必要により管体の内部に配置した揚水管71を介して揚水ポンプ7により揚水されていた。
Such a water collecting pipe 9 is mainly configured as shown in FIG. In other words, it is a pipe that is buried in the ground in a standing manner and the lower side reaches the aquifer L, and in particular, a
また、集水機能を向上させたのものとして、例えば、特許文献1には、地中に埋設した本管となる井筒の胴部分から水平放射状に小径に形成した複数の多孔を有する取水管を配設する構成のものが開示されている。特に、この取水管には各々高圧エアー等を放出する噴射ノズルが取水管の周囲の洗滌や目詰まり防止のために配設されていることが大きな特徴となっている。 Further, as an improvement in the water collecting function, for example, Patent Document 1 includes a plurality of intake pipes having a plurality of perforations formed in a horizontal radial shape with a small diameter from a trunk portion of a well pipe buried in the ground. The thing of the structure to set is disclosed. In particular, this intake pipe is characterized in that an injection nozzle that discharges high-pressure air or the like is provided to prevent washing around the intake pipe and clogging.
特許文献2に開示された集水管は、二つの環体を円周状に沿って配列した芯材で接続して円筒体の呈を成し、この円筒体の外周に線材を僅かな間隙をもって螺旋状に巻いて成る外管を構成し、この外管内により小径な同一構成の内管を配設すると共に、外管と内管の間に砂利を充填して成る構成である。
しかしながら、特許文献1の取水管を配置した井筒は、地下に埋設した井筒の胴囲に取水管の複数を水平かつ放射方向に配置する構成であるため、その設置には井筒周囲の掘削が必要であり、さらにその構造も複雑であることから製作や配置のためのイニシャルコストが嵩む問題があった。また、取水管に高圧管を配置して高圧エアー及び高圧水を必要部位に噴射させているため、ランニングコストも嵩む問題があった。 However, since the well in which the intake pipe of Patent Document 1 is arranged has a configuration in which a plurality of intake pipes are arranged in a horizontal and radial direction around the well of the well buried underground, excavation around the well is necessary for the installation. Furthermore, since the structure is complicated, there is a problem that initial cost for manufacturing and arrangement increases. Moreover, since the high-pressure pipe is arranged in the intake pipe and high-pressure air and high-pressure water are jetted to the necessary part, there is a problem that the running cost increases.
特許文献2の集水管は、線材を周囲に巻回して成る外管に同構造の内管を挿入し、これらの間隙に砂利を充填する複雑な構成であるため、製作コストが嵩むばかりでなく、単位長さの重量もあるために設置の取扱性も悪いものであった。 The water collecting pipe of Patent Document 2 has a complicated configuration in which an inner pipe having the same structure is inserted into an outer pipe formed by winding a wire around, and gravel is filled in these gaps. The handling of the installation was also bad because of the weight of the unit length.
そこで、本願発明は、上記課題の解決を目的とするものであり、簡易な構造でありながら集水機能及び設置のための取扱性が向上した井戸用集水管を提供することを目的とする。 SUMMARY OF THE INVENTION The present invention is intended to solve the above-described problems, and an object of the present invention is to provide a well water collecting pipe having a simple structure and improved water collecting function and handling for installation.
上記の課題を解決するために、本願発明にかかる井戸用集水管1(以下、「本集水管」と略称する。)は、以下のように構成している。 In order to solve the above-described problems, a well water collecting pipe 1 according to the present invention (hereinafter abbreviated as “main water collecting pipe”) is configured as follows.
すなわち、地中に立設状に埋設する1又は複数の透水口(23)を側面に開設した外管(2)と、該外管(2)の内部に離隔空間(4)を持って配設すると共に、1又は複数の通水口(32)を側面に開設した内管(3)と、から成り、外管(2)と内管(3)との上端部を一体的に封止したことを特徴としている。なお、上記内管(3)は外管(2)の内部に複数配置することも可能である。 That is, an outer pipe (2) having one or a plurality of water-permeable ports (23) embedded in a standing manner in the ground and a separation space (4) arranged inside the outer pipe (2). And an inner pipe (3) having one or a plurality of water inlets (32) opened on the side surface, and the upper ends of the outer pipe (2) and the inner pipe (3) are integrally sealed. It is characterized by that. Note that a plurality of the inner pipes (3) can be arranged inside the outer pipe (2).
本集水管(1)の好ましい構成は、鋼管から成る外管(2)の内部に外管(2)より小径の同様に鋼管から成る内管(3)を、同軸二重管構造を成すように配設すると共に、外管(2)の側周囲の一部に網体(22)を配設して透水口(23)を開設し、内管(3)の側面に複数の通水口(32)を放射状にかつ多段状に開設する構成である。また、外管(2)と内管(3)の下端部を一体的に封止すると共に、内管(3)の通水口(32)の開設位置を側面の下端付近に設定する構成である。 A preferable configuration of the water collecting pipe (1) is that an inner pipe (3) having a smaller diameter than that of the outer pipe (2) is formed in the outer pipe (2) made of a steel pipe to form a coaxial double pipe structure. In addition, a net body (22) is provided around a part of the outer circumference of the outer pipe (2) to open a water-permeable port (23), and a plurality of water-flow holes ( 32) is opened radially and in multiple stages. In addition, the lower end of the outer pipe (2) and the inner pipe (3) are integrally sealed, and the opening position of the water inlet (32) of the inner pipe (3) is set near the lower end of the side surface. .
本集水管(1)は上記構成により、外管(2)と内管(3)とがなす離隔空間(4)に帯水層(L)から集水した地下水(W)が一時的に貯留することとなり、内管(3)の貯留量が揚水されて減少した場合には、水圧の平衡化作用により通水口(32)を介して適宜に離隔空間(4)に貯留した地下水(W)が内管(3)に補充されることとなる。 Due to the above configuration, this water collecting pipe (1) temporarily stores groundwater (W) collected from the aquifer (L) in the space (4) formed by the outer pipe (2) and the inner pipe (3). If the amount of water stored in the inner pipe (3) is reduced due to pumping, the groundwater (W) stored in the separation space (4) appropriately through the water inlet (32) by the water pressure balancing action Will be replenished to the inner pipe (3).
本集水管(1)のより好ましい構成は、外管(2)と内管(3)とがなす離隔空間(4)を、例えば、減圧ポンプ(8)等を接続して大気圧より減圧する構成である。この減圧中又は減圧後の一定時間は、離隔空間(4)が大気圧より減圧された、いわゆる負圧状態となるため帯水層(L)からの地下水(W)の集水機能が向上することとなり、離隔空間(4)により多くの地下水(W)を予め貯留することが可能となる。 A more preferable configuration of the water collecting pipe (1) is to depressurize the separation space (4) formed by the outer pipe (2) and the inner pipe (3) from the atmospheric pressure by connecting, for example, a decompression pump (8). It is a configuration. During this depressurization or for a certain period of time after depressurization, the separation space (4) is in a so-called negative pressure state in which the pressure is reduced from the atmospheric pressure, so that the function of collecting groundwater (W) from the aquifer (L) is improved. Thus, it becomes possible to store a large amount of groundwater (W) in the separation space (4) in advance.
なお、上述した括弧付き符号は、発明の構成の理解を得るために図面符号を参考に付記したものであり、この図面上の形態に限定するものではない。 In addition, the code | symbol with the parenthesis mentioned above is added with reference to drawing code | symbol in order to obtain an understanding of the structure of invention, and is not limited to the form on this drawing.
本集水管は、上記の構成であるため、以下の効果を奏する。
すなわち、外管の内部に内管を配設したいわゆる同軸二重管(又は多重管)構造であるため、内管に貯留した地下水を揚水しても、外管と内管との離隔空間に予め貯留する地下水が水圧差の平衡化作用により内管側に通水口を介して流入、言わば補充される。これは、内管側の揚水による貯留量減少の抑制が可能となる上、離隔空間から内管側へ地下水が急激に流入した場合には、離隔空間の上端部側を封止しているため、離隔空間が若干の負圧状態となり帯水層からの集水機能も向上する。
Since this water collection pipe is the above-mentioned composition, the following effects are produced.
That is, since it is a so-called coaxial double pipe (or multiple pipe) structure in which the inner pipe is arranged inside the outer pipe, even if the groundwater stored in the inner pipe is pumped up, the space between the outer pipe and the inner pipe is separated. The groundwater stored in advance flows into the inner pipe side through the water inlet by the balancing action of the water pressure difference, that is, it is replenished. This is because it is possible to suppress a decrease in the amount of storage due to pumping on the inner pipe side, and when the groundwater suddenly flows into the inner pipe side from the separated space, the upper end side of the separated space is sealed. The separation space becomes a slightly negative pressure state, and the water collecting function from the aquifer is also improved.
また、離隔空間を大気圧より減圧した場合には、上述した負圧状態がさらに顕著となるため、帯水層からの集水機能がさらに向上することとなる。 Further, when the separation space is depressurized from the atmospheric pressure, the above-described negative pressure state becomes more prominent, so that the function of collecting water from the aquifer is further improved.
加えて、本集水管の構成は鋼管の同軸二重管(又は多重管)構造と簡易であるために製作が容易であり、重量は嵩張らないために設置のための取扱性も簡便であり、イニシャルコストを抑制できる効果を発揮する。 In addition, the structure of this water collecting pipe is easy to manufacture because it is simple with a coaxial double pipe (or multiple pipe) structure of a steel pipe, and since the weight is not bulky, handling for installation is also simple. Demonstrates the effect of reducing initial costs.
以下に、本集水管の最良の実施形態例について、図面に基づいて詳細に説明する。
図1は本集水管の外観を示す一部切り欠き斜視図であり、図2は本集水管の作用を示す縦断面図である。
Below, the example of the best embodiment of this water collection pipe | tube is demonstrated in detail based on drawing.
FIG. 1 is a partially cutaway perspective view showing the external appearance of the water collecting pipe, and FIG. 2 is a longitudinal sectional view showing the operation of the water collecting pipe.
本集水管1は、所定径の鋼管を地中に立設状に埋設すると共に地上面Gに上端部を露出させた外管2の内部に、外管2より小径の鋼管から成る内管3を同軸二重管構造と成るように配設して構成している。 The water collecting pipe 1 includes an inner pipe 3 made of a steel pipe having a diameter smaller than that of the outer pipe 2 inside an outer pipe 2 in which a steel pipe having a predetermined diameter is embedded in the ground in an upright manner and the upper end portion is exposed on the ground surface G. Are arranged so as to have a coaxial double tube structure.
また、本集水管1は、内管3の外周壁が外管2の内周壁とは所定の離隔距離をもって位置し、離隔空間4を形成している。 Further, in the water collecting pipe 1, the outer peripheral wall of the inner pipe 3 is positioned with a predetermined separation distance from the inner peripheral wall of the outer pipe 2, thereby forming a separation space 4.
さらに、本集水管1の地上に露出した上端部は、地上面Gの水平方向に拡径したフランジ部21、31同士が上下方向で所定空間を成しつつ封止状態となる封止部5を形成している。一方、本集水管1の下端部は、外管2の下端面の全面を覆う大きさの底板6を配置しており、外管2と内管3の両方の下端部を連結状態を成しつつ一体的に封止している。
Further, the upper end portion of the water collecting pipe 1 exposed on the ground is a sealed portion 5 in which the
本集水管1は上記の構成により、その内部に離隔空間4と封止部5が連通状態となる閉空間を形成している。封止部5は、減圧管81を介して地上面Gに配置した減圧ポンプ8と接続が可能であり、必要により離隔空間4を大気圧より減圧することを可能としている。
Due to the above configuration, the water collecting pipe 1 forms a closed space in which the separation space 4 and the sealing portion 5 are in communication. The sealing portion 5 can be connected to the decompression pump 8 disposed on the ground surface G via the
外管2は、その下端部の側面の全周に渡って網体22を配設している。この網体22の配設によって、外管2の側面には複数の透水口23が開設されることなる。この透水口23を介して帯水層Lの地下水Wが外管2の内部である離隔空間4に透水することとなる。内管3の下端部の側面には、複数の孔を放射状にかつ多段状に開孔した通水口32を開設している。この通水口32を介して離隔空間4に貯留した地下水Wが内管3の内部に流入することとなる。
The outer tube 2 is provided with a net 22 over the entire circumference of the side surface of the lower end thereof. By the arrangement of the
なお、外管2の透水口23の開設位置は、本実施形態例の開設位置に限定するものではなく、帯水層Lに適合させた位置に適宜に変更することが可能である。一方、内管3の通水口32の開設位置は、離隔空間4に貯留する地下水Wの流入を得る又は促進するため、内管3の下端付近とすることが望ましいものである。
[作用]
In addition, the opening position of the water permeable opening 23 of the outer tube 2 is not limited to the opening position of the present embodiment, and can be appropriately changed to a position adapted to the aquifer L. On the other hand, the opening position of the
[Action]
上記構成の本集水管1は、予め探索した帯水層Lに到達するボーリング孔に立設状態でかつ封止部5を地上面に露出するように配置しており、以下のように作用する。 The main water collecting pipe 1 having the above-described configuration is arranged in a standing state in the borehole that reaches the aquifer L searched in advance and the sealing portion 5 is exposed on the ground surface, and operates as follows. .
帯水層Lの地下水Wは、外管2の透水口23を介して離隔空間4に透水して貯留する(矢印a)。そして、離隔空間4の地下水Wは内管3の内部に通水口32を介して流入して貯留する(矢印b)。この状態において、離隔空間4と内管3に貯留する地下水Wには水圧を平衡化する作用が生じるため、両者の液面が略同じ高さとなって安定状態となる。
The groundwater W of the aquifer L is permeated into the separation space 4 through the
上記の液面が略同じ高さの状態において、揚水ポンプ7を稼動させて、内管3に貯留した地下水Wをその内部に配置した揚水管71を介して揚水する。この揚水により内管3の地下水Wの貯留量が減ると、離隔空間4に貯留した地下水Wとでは水圧差が生じる。離隔空間4に貯留した地下水Wは、一定時間を要するが水圧差を平衡化する作用が生じるために、内管側へ通水口32を介して流入することとなる(矢印b)。この流入作用に連動し、貯留量が減少した離隔空間4には前記と同様の水圧差を平衡化する作用と上端部の封止による負圧作用が相俟って、帯水層Lから透水口23を介して一定の時間を要しつつも地下水Wが透水することとなる(矢印a)。
In the state where the liquid level is substantially the same, the pump 7 is operated, and the groundwater W stored in the inner pipe 3 is pumped through the
また、離隔空間4に連通する封止部5に接続した減圧ポンプ8を稼動させた場合には、離隔空間4の内部が大気圧より減圧されて若干の負圧状態となり、離隔空間4への帯水層Lからの集水機能が向上する。この集水機能の向上により、離隔空間4の地下水Wの貯留量が増加することとなり、内管3の地下水Wの貯留量の減少を遅滞なく補充可能となる。 Further, when the decompression pump 8 connected to the sealing portion 5 communicating with the separation space 4 is operated, the inside of the separation space 4 is depressurized from the atmospheric pressure to become a slight negative pressure state, The water collection function from the aquifer L is improved. Due to the improvement of the water collecting function, the storage amount of the ground water W in the separation space 4 increases, and the decrease in the storage amount of the ground water W in the inner pipe 3 can be supplemented without delay.
ところで、本集水管1及び従来構造の集水管と同構造となる外管2のみを、同じ帯水層Lに設置して同量の地下水Wを揚水して比較した場合、水位が4%〜8%程度高くなる実験結果を得た。すなわち、本集水管1は、内管3の地下水Wを揚水しても離隔空間4及び帯水層Lからの補充が従来構造の集水管1より向上していることが確認された。 By the way, when only the main pipe 1 and the outer pipe 2 having the same structure as the conventional water collection pipe are installed in the same aquifer L and the same amount of groundwater W is pumped and compared, the water level is 4% to An experimental result that was about 8% higher was obtained. In other words, it was confirmed that the water collecting pipe 1 is more replenished from the separation space 4 and the aquifer L than the water collecting pipe 1 having the conventional structure even when the groundwater W of the inner pipe 3 is pumped up.
1 本集水管
2 外管
21 フランジ部
22 網体
23 透水口
3 内管
31 フランジ部
32 通水口
4 離隔空間
5 封止部
6 底板
7 揚水ポンプ
71 揚水管
8 減圧ポンプ
81 減圧管
9 集水管(従来例の)
91 通水口
G 地上面
L 帯水層
W 地下水
DESCRIPTION OF SYMBOLS 1 Water collecting pipe 2
91 Waterway G Ground surface L Aquifer W Groundwater
Claims (5)
該外管(2)の内部に離隔空間(4)を持って配設すると共に、1又は複数の通水口(32)を側面に開設した内管(3)と、
から成り、
外管(2)と内管(3)との上端部を封止したことを特徴とする井戸用集水管。 An outer pipe (2) having one or more water-permeable ports (23) embedded in a standing manner in the ground,
An inner pipe (3) provided with a separation space (4) inside the outer pipe (2) and having one or more water inlets (32) opened on the side surface;
Consisting of
A water collecting pipe for a well, wherein upper ends of the outer pipe (2) and the inner pipe (3) are sealed.
The water collecting pipe for a well according to claim 1, wherein the space (4) is depressurized from atmospheric pressure.
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JP2006189327A JP4476972B2 (en) | 2006-07-10 | 2006-07-10 | Water collecting pipe for well |
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JP2008014108A true JP2008014108A (en) | 2008-01-24 |
JP4476972B2 JP4476972B2 (en) | 2010-06-09 |
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Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
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JP2010138642A (en) * | 2008-12-12 | 2010-06-24 | Ohbayashi Corp | Well and method for constructing the same |
JP2010138641A (en) * | 2008-12-12 | 2010-06-24 | Ohbayashi Corp | Daily use well and method for constructing the same |
JP2011032715A (en) * | 2009-07-31 | 2011-02-17 | Ikkaku:Kk | Method and device for excavating well and pumping up well water |
RU2479693C2 (en) * | 2011-06-29 | 2013-04-20 | Таран Анатолий Петрович | Water-intake tubular well |
CN108825152A (en) * | 2018-05-10 | 2018-11-16 | 歌山建设集团有限公司 | A kind of deep-well is anti-to bury device and its method for construction |
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2006
- 2006-07-10 JP JP2006189327A patent/JP4476972B2/en active Active
Cited By (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2010138642A (en) * | 2008-12-12 | 2010-06-24 | Ohbayashi Corp | Well and method for constructing the same |
JP2010138641A (en) * | 2008-12-12 | 2010-06-24 | Ohbayashi Corp | Daily use well and method for constructing the same |
JP2011032715A (en) * | 2009-07-31 | 2011-02-17 | Ikkaku:Kk | Method and device for excavating well and pumping up well water |
RU2479693C2 (en) * | 2011-06-29 | 2013-04-20 | Таран Анатолий Петрович | Water-intake tubular well |
CN108825152A (en) * | 2018-05-10 | 2018-11-16 | 歌山建设集团有限公司 | A kind of deep-well is anti-to bury device and its method for construction |
CN108825152B (en) * | 2018-05-10 | 2024-01-02 | 歌山建设集团有限公司 | Deep well anti-burying device and construction method thereof |
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