JP4075411B2 - Drain pipe block - Google Patents

Drain pipe block Download PDF

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Publication number
JP4075411B2
JP4075411B2 JP2002056193A JP2002056193A JP4075411B2 JP 4075411 B2 JP4075411 B2 JP 4075411B2 JP 2002056193 A JP2002056193 A JP 2002056193A JP 2002056193 A JP2002056193 A JP 2002056193A JP 4075411 B2 JP4075411 B2 JP 4075411B2
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Japan
Prior art keywords
filter material
water
water collecting
collecting pipe
pipe block
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JP2003253706A (en
Inventor
正三 加藤
卓 栗本
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Obayashi Corp
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Obayashi Corp
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    • YGENERAL 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
    • Y02TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
    • Y02ATECHNOLOGIES FOR ADAPTATION TO CLIMATE CHANGE
    • Y02A20/00Water conservation; Efficient water supply; Efficient water use

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Description

【0001】
【発明の属する技術分野】
この発明は、集水管ブロックに関し、特に、濾過層と一体化された集水管ブロックに関するものである。
【0002】
【従来の技術】
上水道用の水を河川や湖沼などから取水する場合や、淡水化処理施設に導入する水を海中から取水する際には、水底に貫通孔が設けられた有孔集水管が敷設される。
【0003】
従来、この種の集水管を水底に敷設する方法としては、図4に示すような方法が採用されていた。同図に示した敷設方法は、水底現地盤1を掘削した後に、その掘削箇所に集水管2を設置して、その上部側からトレミー管3を用いて、砕石や砂などの濾過材4を埋め戻していた。
【0004】
ところが、このような集水管の敷設方法では、集水管2が濾過材4の投入により移動すること、また、同図に示すように、粒径が異なる複数種の濾過材4を用いる場合には、種類毎にトレミー管3で投入するものの、境界部分で相互に混ざり合って、層毎の管理が難しいと言う問題があった。
【0005】
このような問題に対しては、例えば、図5に示すような、プレキャスト形式の集水管ブロック5を予め製作し、複数の集水管ブロック5を水底に設置することで、集水管を敷設することが検討されている。
【0006】
図5に示した集水管ブロック5は、金網などで構成した内,外枠6,7を有し、内枠6内にこれを貫通するようにして集水管2を設置し、内枠6内に砕石などの粗濾過材4aを充填し、内,外枠6,7間に砂や細砕石などの細濾過材4bを充填している。
【0007】
このような集水管ブロック5を用いると、集水管2の移動などの不都合が解消され、濾過材4の埋め戻しも不要になるが、このような構造の集水管ブロック5を得ようとすると、図6に示す工程により行われる。
【0008】
すなわち、まず、外枠7の底に細濾過材4bを所定厚みになるように敷き詰めて、その上部に内枠6を載せる。この内枠6内には、予め、底部に粗濾過材4aを所定厚みに敷き詰めて、その上部に有孔管2を載せて、残りの粗濾過材4bを充填して、上端を閉塞しておく。
【0009】
そして、外枠7内にさらに細濾過材4bを充填した後に、その上端側を閉塞する。しかしながら、このような集水管ブロック5の製造には、以下に説明する課題があった。
【0010】
【発明が解決しようとする課題】
すなわち、図6に示した集水管ブロック5の製造では、工程数が多く、製造期間がかかり、製造コストも嵩むという問題があった。
【0011】
本発明は、このような従来の問題点に鑑みてなされたものであって、その目的とするところは、簡単な工程で製造することができ、製造期間の短縮とコストの削減とを同時に達成することができる集水管ブロックを提供することにある。
【0012】
【課題を解決するための手段】
上記目的を達成するために、本発明は、有孔管と、前記有孔管の周囲に配置される粒状濾過材とを備えた集水管ブロックにおいて、前記有孔管の外周に、内側に前記粒状濾過材を介装した網目材を渦巻状に捲回した集水管ブロックであって、
前記粒状濾過材は、粒径が大きい粗砕石などからなる粗濾過材と、粒径が小さい砂や細砕石などからなる細濾過材とを備え、前記粗濾過材の層を前記有孔管の外周側に複層配置し、前記粗濾過材の外周側に前記細濾過材の層を複層配置するとともに、前記粒状濾過材は、粒状濾過材同士が相互に水溶性接着剤により接着されるとともに、同水溶性接着剤により前記網目材に接着するようにした。
【0013】
上記構成の集水管ブロックによれば、有孔管の外周に、内側に粒状濾過材を介装した網目材を、渦巻状に捲回すると所要の集水管ブロックが得られるので、簡単な工程で製造することができ、製造期間の短縮とコストの削減とを同時に達成することができる。また、粒状濾過材は、粒径が大きい粗砕石などからなる粗濾過材と、粒径が小さい砂や細砕石などからなる細濾過材とを備え、粗濾過材の層を有孔管の外周側に複層配置し、粗濾過材の外周側に細濾過材の層を複層配置するので、有孔管の外周に濾過材層の密度勾配を設けることができ、濾過材の機能を長期間有効に発揮させることができる。
【0017】
【発明の実施の形態】
以下、本発明の好適な実施の形態について、添付図面に基づいて詳細に説明する。図1および図2,3は、本発明にかかる集水管ブロックの第1実施例を示している。
【0018】
同図に示した集水管ブロック10は、有孔管12と、有孔管12の周囲に配置される粒状濾過材14と、網目材16を備えている。有孔管12は、所定長さの中空円筒状のものであって、多数の貫通孔18が設けられている。
【0019】
粒状濾過材14は、本実施例の場合には、粒径が大きい粗砕石などからなる粗濾過材14aと、粒径が小さい砂や細砕石などからなる細濾過材14bとから構成されている。
【0020】
このような粗および細濾過材14a,14bは、本実施例の場合には、有孔管12の外周を周回する層状に形成されていて、粗濾過材14aの層が、有孔管12の直近外周側に複層配置され、この粗濾過材14aの外周側に細濾過材14bの層が、複層配置されている。
【0021】
このような濾過材14a,14bの配置構造によれば、有孔管12の直近に密度の粗い濾過層(粗濾過材14aの層)が複層あって、その外周に密度の細かい濾過層(細濾過材14bの層)が複層存在していて、密度勾配が設けられている。
従って、有孔管12内に水を取り込む際に、異物の捕集が、複数の層で行われるとともに、外側の層に目詰まりが発生しても、内部の層は、まだ濾過機能を有していて、濾過材の機能を長期間有効に発揮させることができるし、異物の捕集を行う細濾過材14bが、有孔管12の内部に侵入することも防止される。
また、このような密度勾配を設けておくと、集水ブロック10を水底に設置して、その外周側を砂で埋め戻す際に、埋め戻し用の砂が有孔管12の内部に侵入することも防止される。
【0022】
網目材16は、例えば、細濾過材14bの通過を阻止する目付けの金網や、織布などから構成され、粒状濾過材14を内側に介装(ないしは保持)した状態で、有孔管12の外周に渦巻状に捲回される。
【0023】
この網目材16の捲回終端は、その内周側の網目に係止したり、あるいは、外周にワイヤーなどを巻き付けることなどにより、止着される。このような構成の集水管ブロック10は、図2に示すように、網目材16を展開し、その上面に粒状濾過材14を所定厚みに撒き出して、網目材16の始端側を有孔管12の外周面に係止して、有孔管12を回転させることで、粒状濾過材14が内面側に介装(ないしは保持)された状態の網目材16を、有孔管12の外周に巻き取り、網目材16の終端を前述した方法により止着すると得られる。
【0024】
さて、以上のように構成した集水管ブロック10によれば、有孔管12の外周に、内側に粒状濾過材14を介装(ないしは保持)した網目材16を渦巻状に捲回すると、所要のものが得られるので、簡単な工程で製造することができ、製造期間の短縮とコストの削減とを同時に達成することができる。
【0036】
図3は、集水管ブロック10の詳細説明図であり、同図に示した集水管ブロック10cは、有孔管12と、有孔管12の周囲に配置される粒状濾過材14とを備え、有孔管12の外周に、内側に粒状濾過材14を介装した網目材16が渦巻状に捲回されている。
【0037】
本実施例の場合には、粒状濾過材14は、粗濾過材14aと細濾過材14bとから構成されていて、各粒状濾過材14は、水溶性接着剤により、濾過材14同士が相互に接着されるとともに、網目材16に接着されている。
【0038】
水溶性接着剤は、集水管ブロック10cを水に浸漬すると、所定の時間を経過することにより溶解し、濾過材14間に水の透過が可能な空隙が形成される。
【0039】
このように構成した実施例によれば、水に浸漬するまでは、粒状濾過材14が相互に接着し、かつ、網目材16に接着しているので、層状に粒状濾過材14を形成する際の、各層の厚みの均一化を容易に確保することができるとともに、網目材16に介装する際に、濾過材14が離脱することがなくなり、捲回作業を簡単に行うことができ、より一層製造能率が向上する。
【0040】
なお、上記実施例では、有孔管12は、円筒状中空形状のものを例示したが、本発明の実施は、これに限定されることはなく、例えば、四角形などの多角筒状などの形状であってもよい。
【0041】
【発明の効果】
以上、詳細に説明したように、本発明にかかる集水管ブロックのよれば、簡単な工程で製造することができ、製造期間の短縮とコストの削減とを同時に達成することができる。
【図面の簡単な説明】
【図1】本発明にかかる集水管ブロックの第1実施例を示す断面図である。
【図2】図1に示した集水管ブロックを製造する際の説明図である。
【図3】本発明にかかる集水管ブロックの詳細を示す要部断面説明図である。
【図4】従来の集水管を水底に敷設する方法の説明図である。
【図5】従来の集水管ブロックの断面図である。
【図6】図7に示した集水管ブロックの製造工程の説明図である。
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water collection pipe block, and more particularly to a water collection pipe block integrated with a filtration layer.
[0002]
[Prior art]
When water for water supply is taken from rivers or lakes, or when water to be introduced into a desalination treatment facility is taken from the sea, a perforated water collecting pipe with a through hole at the bottom is laid.
[0003]
Conventionally, a method as shown in FIG. 4 has been employed as a method of laying this type of water collecting pipe on the bottom of the water. In the laying method shown in the figure, after excavating the bottom bottom panel 1, a water collecting pipe 2 is installed at the excavation site, and a filter medium 4 such as crushed stone or sand is attached from the upper side using the tremy pipe 3. I was backfilling.
[0004]
However, in such a method of laying a water collection pipe, the water collection pipe 2 is moved by the introduction of the filter medium 4 and, as shown in the figure, when a plurality of kinds of filter mediums 4 having different particle diameters are used. However, although the treme tube 3 is used for each type, there is a problem that it is difficult to manage each layer because they are mixed with each other at the boundary.
[0005]
For such a problem, for example, as shown in FIG. 5 , a precast-type water collecting pipe block 5 is manufactured in advance, and a plurality of water collecting pipe blocks 5 are installed on the bottom of the water, thereby laying the water collecting pipe. Is being considered.
[0006]
The water collecting pipe block 5 shown in FIG. 5 has inner and outer frames 6 and 7 made of a wire mesh and the like, and the water collecting pipe 2 is installed in the inner frame 6 so as to penetrate the inner frame 6. A coarse filter medium 4 a such as crushed stone is filled in, and a fine filter medium 4 b such as sand or fine crushed stone is filled between the inner and outer frames 6 and 7.
[0007]
When such a water collecting pipe block 5 is used, inconveniences such as movement of the water collecting pipe 2 are eliminated, and the backfilling of the filter medium 4 is not required. However, when trying to obtain the water collecting pipe block 5 having such a structure, The process shown in FIG. 6 is performed.
[0008]
That is, first, the fine filter medium 4b is spread on the bottom of the outer frame 7 so as to have a predetermined thickness, and the inner frame 6 is placed on the top. The inner frame 6 is preliminarily covered with a coarse filter medium 4a at the bottom, a perforated tube 2 is placed on the top, the remaining coarse filter medium 4b is filled, and the upper end is closed. deep.
[0009]
After the outer filter 7 is further filled with the fine filter material 4b, the upper end side is closed. However, the manufacture of such a water collecting pipe block 5 has the following problems.
[0010]
[Problems to be solved by the invention]
That is, the manufacture of the water collecting pipe block 5 shown in FIG. 6 has a problem that the number of steps is large, a manufacturing period is required, and the manufacturing cost increases.
[0011]
The present invention has been made in view of such conventional problems, and the object of the present invention is that it can be manufactured by a simple process, and a reduction in manufacturing period and a reduction in cost are achieved at the same time. It is to provide a water collecting pipe block that can do.
[0012]
[Means for Solving the Problems]
In order to achieve the above object, the present invention provides a water collecting pipe block including a perforated pipe and a granular filter medium disposed around the perforated pipe, and the inside of the perforated pipe is provided inside the perforated pipe. A water collecting pipe block in which a mesh material interposing a granular filter material is wound in a spiral shape,
The granular filter material includes a coarse filter material made of coarse crushed stone having a large particle size, and a fine filter material made of sand or crushed stone having a small particle size, and the layer of the coarse filter material is made of the porous tube. A plurality of layers are disposed on the outer peripheral side, and a plurality of layers of the fine filter medium are disposed on the outer peripheral side of the coarse filter medium , and the granular filter medium is bonded to each other by a water-soluble adhesive. At the same time, it was adhered to the mesh material with the same water-soluble adhesive .
[0013]
According to the water collecting pipe block having the above-described configuration, the required water collecting pipe block can be obtained by winding the mesh material interposing the granular filter material inside on the outer periphery of the perforated pipe in a spiral shape. Manufacturing can be achieved, and a reduction in manufacturing time and cost can be achieved at the same time. The granular filter medium includes a coarse filter medium made of coarse crushed stone having a large particle diameter and a fine filter medium made of sand or crushed stone having a small particle diameter, and the layer of the coarse filter medium is disposed on the outer periphery of the perforated tube. Since multiple layers are arranged on the side and fine filter media layers are arranged on the outer peripheral side of the coarse filter media, it is possible to provide a density gradient of the filter media layer on the outer periphery of the perforated tube, and to increase the function of the filter media. It can be made effective during the period.
[0017]
DETAILED DESCRIPTION OF THE INVENTION
DESCRIPTION OF EXEMPLARY EMBODIMENTS Hereinafter, preferred embodiments of the invention will be described in detail with reference to the accompanying drawings. 1 and 2 and 3 show a first embodiment of a water collecting pipe block according to the present invention.
[0018]
The water collecting pipe block 10 shown in the figure includes a perforated pipe 12, a granular filter material 14 disposed around the perforated pipe 12, and a mesh material 16. The perforated tube 12 has a hollow cylindrical shape with a predetermined length and is provided with a large number of through holes 18.
[0019]
In the case of the present embodiment, the granular filter material 14 is composed of a coarse filter material 14a made of coarse crushed stone or the like having a large particle size and a fine filter material 14b made of sand or crushed stone or the like having a small particle size. .
[0020]
In the case of the present embodiment, such coarse and fine filter media 14 a and 14 b are formed in a layered shape around the outer periphery of the perforated tube 12, and the layer of the coarse filter media 14 a is formed of the perforated tube 12. A plurality of layers are arranged on the nearest outer peripheral side, and a layer of the fine filter material 14b is arranged on the outer peripheral side of the coarse filter material 14a.
[0021]
According to such an arrangement structure of the filter media 14a and 14b, there are multiple dense filter layers (layers of the coarse filter media 14a) in the immediate vicinity of the perforated tube 12, and a fine filter layer (fine filter layer on the outer periphery (layer). There are multiple layers of the fine filter medium 14b), and a density gradient is provided.
Therefore, when water is taken into the perforated tube 12, foreign matter is collected in a plurality of layers, and even if the outer layer is clogged, the inner layer still has a filtration function. In addition, the function of the filter medium can be effectively exhibited for a long period of time, and the fine filter medium 14b that collects foreign matters is prevented from entering the inside of the perforated pipe 12.
Further, when such a density gradient is provided, when the water collecting block 10 is installed at the bottom of the water and the outer peripheral side thereof is backfilled with sand, the backfilling sand enters the inside of the perforated pipe 12. This is also prevented.
[0022]
The mesh material 16 is made of, for example, a metal mesh or a woven fabric for preventing passage of the fine filter material 14b, and the porous filter 12 is formed with the granular filter material 14 interposed (or held) inside. It is wound around the outer periphery in a spiral shape.
[0023]
The winding end of the mesh material 16 is fastened by locking the mesh on the inner peripheral side or winding a wire or the like around the outer periphery. As shown in FIG. 2, the water collecting pipe block 10 having such a configuration develops the mesh material 16, spreads the granular filter material 14 to a predetermined thickness on the upper surface thereof, and opens the mesh material 16 to the perforated pipe. The mesh material 16 in a state where the granular filter material 14 is interposed (or held) on the inner surface side by rotating the perforated tube 12 while being locked to the outer peripheral surface of the outer periphery of the perforated tube 12. It is obtained by winding and fastening the end of the mesh material 16 by the method described above.
[0024]
Now, according to the water collecting pipe block 10 configured as described above, it is necessary to wind the mesh material 16 having the granular filter medium 14 interposed (or held) on the outer periphery of the perforated pipe 12 in a spiral shape. Therefore, it is possible to manufacture in a simple process, and it is possible to simultaneously achieve a reduction in manufacturing time and cost.
[0036]
FIG. 3 is a detailed explanatory view of the water collecting pipe block 10, and the water collecting pipe block 10 c shown in the figure includes a perforated pipe 12 and a granular filter medium 14 disposed around the perforated pipe 12. On the outer periphery of the perforated pipe 12, a mesh material 16 having a granular filter material 14 interposed inside is wound in a spiral shape.
[0037]
In the case of the present embodiment, the granular filter medium 14 is composed of a coarse filter medium 14a and a fine filter medium 14b, and each of the granular filter mediums 14 is mutually connected by a water-soluble adhesive. In addition to being bonded, it is bonded to the mesh material 16.
[0038]
When the water collecting adhesive block 10 c is immersed in water, the water-soluble adhesive dissolves after a predetermined time has elapsed, and a gap that allows water to pass through is formed between the filter media 14.
[0039]
According to the embodiment configured as described above, the granular filter media 14 are bonded to each other and bonded to the mesh material 16 until they are immersed in water. The thickness of each layer can be easily ensured, and when interposing the mesh material 16, the filter medium 14 is not detached, and the winding operation can be easily performed. The production efficiency is further improved.
[0040]
In the above embodiment, the perforated tube 12 is exemplified by a cylindrical hollow shape, but the implementation of the present invention is not limited to this, and for example, a shape such as a polygonal cylinder such as a quadrangle. It may be.
[0041]
【The invention's effect】
As described above in detail, according to the water collecting pipe block according to the present invention, it can be manufactured by a simple process, and a shortening of the manufacturing period and a reduction in cost can be achieved at the same time.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing a first embodiment of a water collecting pipe block according to the present invention.
FIG. 2 is an explanatory diagram when the water collecting pipe block shown in FIG. 1 is manufactured.
FIG. 3 is an explanatory cross-sectional view of a main part showing details of a water collecting pipe block according to the present invention.
FIG. 4 is an explanatory view of a method of laying a conventional water collecting pipe on the bottom of the water.
FIG. 5 is a cross-sectional view of a conventional water collecting pipe block.
6 is an explanatory diagram of a manufacturing process of the water collecting pipe block shown in FIG . 7;

Claims (1)

有孔管と、前記有孔管の周囲に配置される粒状濾過材とを備えた集水管ブロックにおいて、
前記有孔管の外周に、内側に前記粒状濾過材を介装した網目材を渦巻状に捲回した集水管ブロックであって、
前記粒状濾過材は、粒径が大きい粗砕石などからなる粗濾過材と、粒径が小さい砂や細砕石などからなる細濾過材とを備え、
前記粗濾過材の層を前記有孔管の外周側に複層配置し、前記粗濾過材の外周側に前記細濾過材の層を複層配置するとともに、前記粒状濾過材は、粒状濾過材同士が相互に水溶性接着剤により接着されるとともに、同水溶性接着剤により前記網目材に接着することを特徴とする集水管ブロック。
In a water collection pipe block provided with a perforated pipe and a granular filter medium disposed around the perforated pipe,
On the outer periphery of the perforated pipe, a water collecting pipe block in which a mesh material interposing the granular filter material is wound in a spiral shape,
The granular filter material includes a coarse filter material made of coarse crushed stone having a large particle size, and a fine filter material made of sand or crushed stone having a small particle size,
A plurality of layers of the coarse filter material are arranged on the outer peripheral side of the perforated tube, a plurality of layers of the fine filter material are arranged on the outer peripheral side of the coarse filter material , and the granular filter material is a granular filter material. The water collecting pipe block is characterized in that they are bonded to each other with a water-soluble adhesive and are bonded to the mesh material with the water-soluble adhesive .
JP2002056193A 2002-03-01 2002-03-01 Drain pipe block Expired - Fee Related JP4075411B2 (en)

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JP5145094B2 (en) * 2008-03-25 2013-02-13 株式会社松村組 Water collection segment and water collection tunnel construction method
CN102444168B (en) * 2011-09-07 2013-09-11 浙江省海洋开发研究院 Seawater taking system and sewage disposal device

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