JP2013036177A - Construction method of water collecting pipe, construction device of water collecting pipe, and construction structure of water collecting pipe - Google Patents
Construction method of water collecting pipe, construction device of water collecting pipe, and construction structure of water collecting pipe Download PDFInfo
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本発明は、特に多量の地下水を取水することができる集水井に取り付ける集水管の施工方法、集水管の施工装置、集水管の施工構造に関する。 The present invention relates to a method for constructing a water collecting pipe, a construction apparatus for the water collecting pipe, and a construction structure for the water collecting pipe, which are attached to a water collecting well that can take in a large amount of groundwater.
飲料等の生活用水、工業及び農業等の産業用水として、地表水（河川水、湖沼水など）・地下水・再利用水が利用されている。このうち地下水は、土中の帯水層まで掘削した井戸から取水して確保することができる。特に、産業用水など多量の地下水が必要な場合には、効率的に大量の地下水を確保することができる次のような集水井が利用されている。 Surface water (river water, lake water, etc.), ground water, and reused water are used as domestic water for drinks, industrial water for industry and agriculture. Of these, groundwater can be secured by taking water from wells excavated in the soil. In particular, when a large amount of groundwater such as industrial water is required, the following wells that can efficiently secure a large amount of groundwater are used.
図７は従来の集水井の説明図であり、（１）は側面の断面図であり、（２）は（１）のＡ−Ａ線の断面図である。
図示のように、従来の集水井１は、井筒２と、集水管３を主な基本構成としている。井筒２は、円筒形状の筒本体からなり、地表から所定深さの帯水層４まで掘削した掘削穴に埋設している。井筒２の材質としては、強度等を考慮して鉄筋コンクリート又は金属材料を適用することができる。井筒２の長さは、地表から帯水層４まで達する長さに設定している。井筒２の直径は、集水管３を圧入する水平ボーリング工事に必要なスペースを確保できる長さに設定する必要がある。そして、外部の帯水層４と接する井筒２の側壁には、壁面に沿って複数の挿入孔５が形成されている。この挿入孔５には、内側から外側の帯水層４に向けて、集水管３を圧入している。
FIG. 7 is an explanatory view of a conventional drainage well, (1) is a side sectional view, and (2) is a sectional view taken along line AA in (1).
As shown in the figure, a conventional water collection well 1 has a well 2 and a water collection pipe 3 as main basic configurations. The well 2 is composed of a cylindrical tube main body, and is buried in an excavation hole excavated from the ground surface to the aquifer 4 having a predetermined depth. As a material of the well 2, reinforced concrete or a metal material can be applied in consideration of strength and the like. The length of the well 2 is set to a length that reaches from the ground surface to the aquifer 4. The diameter of the well 2 needs to be set to a length that can secure a space necessary for horizontal boring work for press-fitting the water collecting pipe 3. A plurality of insertion holes 5 are formed on the side wall of the well 2 in contact with the external aquifer 4 along the wall surface. A water collecting pipe 3 is press-fitted into the insertion hole 5 from the inner side toward the outer aquifer layer 4.
集水管３は円筒状の配管であって、管面に複数の集水孔が形成されている。この集水孔は所定の孔径に設定されており、帯水層４から地下水を管内に導入することができる。集水管３は、井筒２を中心として、水平放射状に突き出すように取り付けられている。集水井１は、この突き出し分だけ井戸半径を大きくすることができ、大量取水に有利な構造となる。 The water collecting pipe 3 is a cylindrical pipe, and a plurality of water collecting holes are formed on the pipe surface. This water collection hole is set to a predetermined hole diameter, and groundwater can be introduced into the pipe from the aquifer 4. The water collecting pipe 3 is attached so as to protrude radially from the well 2. The drainage well 1 can increase the well radius by the amount of this protrusion, and has a structure that is advantageous for mass water intake.
このような集水井１は、一例として、内径が４ｍ〜７ｍの鉄筋コンクリート又は鋼製の井筒２を用いて、井筒２から水平放射状に多孔の集水管３を突き出した構造となる。集水管３の設置深さ、本数は、帯水層４の現場状況によって異なり、帯水層４の１段当たりの本数を６本から３０本に設定することができる。また帯水層４の段数は２段〜３段、集水管３の長さは５ｍ〜３０ｍ程度に設定することができる。 As an example, such a water collection well 1 has a structure in which a porous water collection tube 3 is protruded horizontally from the well 2 using a reinforced concrete or steel well 2 having an inner diameter of 4 m to 7 m. The installation depth and number of water collecting pipes 3 vary depending on the situation of the aquifer 4, and the number of aquifers 4 per stage can be set from 6 to 30. The number of stages of the aquifer 4 can be set to 2 to 3 stages, and the length of the water collecting pipe 3 can be set to about 5 to 30 m.
図８は従来の集水管の施工方法の説明図である。
従来の集水管の施工方法は、ボーリングマシーンによる打撃、回転、フィード（給進）を併用した二重管掘削方式を採用している。
まず（１）に示すように、内管８ａと外管８ｂから構成される二重管８の先端にドリルヘッドを取り付けて、このドリルヘッドにより、打撃、回転させて集水管の長さに相当する長さまで掘削する。
FIG. 8 is an explanatory view of a conventional water collecting pipe construction method.
The conventional method of constructing a water collection pipe employs a double pipe excavation method that uses both boring machine hitting, rotation, and feed (feeding).
First, as shown in (1), a drill head is attached to the tip of the double pipe 8 composed of the inner pipe 8a and the outer pipe 8b, and this drill head is struck and rotated to correspond to the length of the water collecting pipe. Drill to the length you want.
次に（２）に示すように、掘削後、二重管８の内管だけを引き抜く。そして（３）に示すように、内管に替えて集水管３を外管８ｂの内側に挿入する。
次に（４）に示すように、外管を引き抜く。このとき、外管で抑えられていた外管の管周辺の地下水と土砂が井筒２内に一気に流入する。そして（５）に示すように、井筒２の挿入孔５と集水管３の間にパッキン９を設置して、集水管３の管周辺からの地下水と土砂の流入を止める。この操作を井筒２に形成した挿入孔５に対して繰り返して行う。
Next, as shown in (2), after excavation, only the inner pipe of the double pipe 8 is pulled out. Then, as shown in (3), the water collecting pipe 3 is inserted inside the outer pipe 8b instead of the inner pipe.
Next, as shown in (4), the outer tube is pulled out. At this time, the groundwater and earth and sand around the pipe of the outer pipe that has been suppressed by the outer pipe flows into the well 2 at a stretch. And as shown to (5), the packing 9 is installed between the insertion hole 5 of the well 2 and the water collection pipe 3, and the inflow of the groundwater and earth and sand from the pipe | tube periphery of the water collection pipe 3 is stopped. This operation is repeated for the insertion hole 5 formed in the well 2.
このような集水井１によれば、施工が容易で、一例として、１００００ｍ３／日以上の大量の地下水を確保することができる。
前記集水井を用いた取水方法・装置として特許文献１，２が挙げられる。
According to such a drainage well 1, construction is easy, and as an example, a large amount of groundwater of 10000 m 3 / day or more can be secured.
Patent documents 1 and 2 are mentioned as a water intake method and apparatus using the above-mentioned drainage well.
特許文献１には、浅井戸の胴囲に多孔状の集水管を放射状に設けて、砂礫層の周域を高圧エアー、高圧水で洗浄し、浅深度の地下水を取水する地下水の広域取水方法が開示されている。
特許文献２には、地下水を貯留する貯水部の内側から外側に向けてスライドして集水管を地中に圧入する圧入部を備えた集水管埋設装置が開示されている。
Patent Document 1 discloses a method for wide-area intake of groundwater in which a porous water collecting pipe is provided radially around the circumference of a shallow well, the surrounding area of the gravel layer is washed with high-pressure air and high-pressure water, and shallow groundwater is taken. Is disclosed.
Patent Document 2 discloses a water collection pipe embedment device that includes a press-fitting part that slides from the inside to the outside of a water storage part that stores groundwater and press-fits a water collection pipe into the ground.
図９は従来の集水管の施工構造の説明図である。（１）は集水管の施工前の帯水層の断面図である。図示のように帯水層４は、粗粒子６と、細粒子７とが略均等に分散した層である。このような帯水層４は、層中を流れる地下水に好適な隙間が形成されている。 FIG. 9 is an explanatory diagram of a construction structure of a conventional water collecting pipe. (1) is a sectional view of the aquifer before construction of the water collecting pipe. As shown in the figure, the aquifer 4 is a layer in which coarse particles 6 and fine particles 7 are dispersed substantially evenly. In such an aquifer 4, a gap suitable for groundwater flowing in the layer is formed.
（２）は、図８（１）の工程によって帯水層４に挿入された二重管８の断面を示している。二重管８を構成する外管によって、集水管３の断面径よりも大きい、外管の断面径に相当する土が取り除かれている。 (2) has shown the cross section of the double pipe 8 inserted in the aquifer 4 by the process of FIG. 8 (1). The outer pipe constituting the double pipe 8 removes soil corresponding to the cross-sectional diameter of the outer pipe, which is larger than the cross-sectional diameter of the water collecting pipe 3.
（３）は、図８（４）の工程によって帯水層４に埋設された集水管３の断面を示している。外管を取り外したことにより、矢印に示す管周辺の粗粒子６及び細粒子７などの土層が緩んで、地下水が流れる隙間が形成される。このとき短期的に集水能力が高くなる。しかし、二重管掘削方式では、一旦、集水管３よりも管径の大きい孔を掘削してから集水管３の管径に戻しているため、管周辺の土層を乱すことになり、集水管３の孔に目詰まりや、細粒子７が膜状に形成されることによる土中の目詰まりによって次第に集水能力が低下してしまう。 (3) has shown the cross section of the water collection pipe | tube 3 embed | buried in the aquifer 4 by the process of FIG. 8 (4). By removing the outer tube, soil layers such as coarse particles 6 and fine particles 7 around the tube indicated by the arrows are loosened, and a gap through which groundwater flows is formed. At this time, the water collection capacity increases in the short term. However, in the double pipe excavation method, since a hole having a diameter larger than that of the water collecting pipe 3 is once excavated and then returned to the diameter of the water collecting pipe 3, the soil layer around the pipe is disturbed, Clogging in the holes of the water pipe 3 and clogging in the soil due to the formation of the fine particles 7 in a film form gradually reduce the water collecting ability.
このように取水量の低下の原因としては細粒子による目詰まりが挙げられる。ところで、従来の目詰まりしにくい土層構造としては、廃棄物処分場の集排水管や、集水埋渠が知られている。図１０は、廃棄物処分場の集排水管の説明図である。図示のように、透水層中の集水管３は管周辺に粗粒子６の層（粗粒層）を設けている。換言すれば、集水管３は粗粒層で覆われている。そして集水管３の管周辺から外部へ離れるに従って次第に粒径の小さい材量の層を構築している。このような集水管３の施工構造であれば、管周辺から外部に向けて次第に粒径を細かく設定することにより、集水管３の目詰まりを防止することができる。 Thus, clogging due to fine particles can be cited as a cause of the decrease in water intake. By the way, as a conventional soil layer structure which is hard to be clogged, a drainage pipe of a waste disposal site and a drainage buried are known. FIG. 10 is an explanatory diagram of a drainage pipe of a waste disposal site. As shown in the drawing, the water collecting pipe 3 in the water permeable layer is provided with a layer of coarse particles 6 (coarse grain layer) around the pipe. In other words, the water collecting pipe 3 is covered with a coarse particle layer. And the layer of the material amount with a small particle size is built gradually as it leaves | separates from the pipe | tube periphery of the water collection pipe | tube 3 to the exterior. With such a construction structure of the water collecting pipe 3, clogging of the water collecting pipe 3 can be prevented by gradually setting the particle diameter gradually from the pipe periphery to the outside.
しかしながら、図１０に示す集水管の施工構造を施工するには、次のように行わなければならない。まず、平面視した集水管に相当する領域を地表から帯水層の下層の難透水性層まで掘削した後、粗粒層を敷いて集水管を配置する。そして集水管の側面及び上面を粗粒層で覆う。このように図１０に示す集水管の施工方法は、いわゆる気中工程で行わなければならず、二重管掘削方式によって形成することができなかった。また地表から帯水層まで掘削すると、帯水層を損傷する可能性や、施工費用が極めて高くなるなどの問題があった。 However, in order to construct the construction structure of the water collection pipe shown in FIG. 10, it must be performed as follows. First, after excavating the area corresponding to the water collecting pipe in plan view from the ground surface to the poorly permeable layer below the aquifer, the water collecting pipe is arranged with a coarse layer. And the side surface and upper surface of a water collecting pipe are covered with a coarse grain layer. Thus, the construction method of the water collection pipe shown in FIG. 10 had to be performed in a so-called air process, and could not be formed by a double pipe excavation method. Excavation from the surface to the aquifer also has problems such as possible damage to the aquifer and extremely high construction costs.
このように従来の集水管の施工方法によれば、外管の引き抜き時に外管の外径と集水管の外径の隙間に地下水と共に土砂が瞬時に導かれて、集水管の孔の部分的な閉塞及び集水管の管周辺の土の乱れから取水効率の低下等が生じることがあった。また、図１０に示す集水管構造は、従来の圧入方式で形成することができなかった。さらに、特許文献２のような集水管の圧入工程によれば、管周辺の細粒子が粗粒子間の隙間を埋めてしまったり、細粒子による集水管の孔の目詰まりが起こったりして、取水効率が低下して長期の安定した取水を行うことができない虞がある。 Thus, according to the conventional construction method of the water collection pipe, when the outer pipe is pulled out, the earth and sand are instantaneously introduced into the gap between the outer diameter of the outer pipe and the outer diameter of the water collection pipe, together with the groundwater, so that In some cases, the water intake efficiency is reduced due to the clogging and the disturbance of the soil around the collecting pipe. Further, the water collecting pipe structure shown in FIG. 10 cannot be formed by the conventional press-fitting method. Furthermore, according to the press-fitting process of the water collecting pipe as in Patent Document 2, fine particles around the pipe fill the gaps between the coarse particles, or the holes of the water collecting pipe are clogged by the fine particles, There is a possibility that long-term stable water intake cannot be performed due to a decrease in water intake efficiency.
そこで本発明は、集水管の目詰まりを防止して長期的に安定した取水能力を維持することができる集水管の施工方法、集水管の圧入装置、集水管の施工構造を提供することを目的としている。 Therefore, the present invention has an object to provide a water collection pipe construction method, a water collection pipe press-fitting device, and a water collection pipe construction structure that can prevent clogging of the water collection pipe and maintain a long-term stable water intake capacity. It is said.
上記従来技術の問題点を解決するため、本発明の集水管の施工方法は、集水井の側壁から周囲の帯水層に向けて集水管を施工する集水管の施工方法において、前記帯水層に挿入した前記集水管に振動を加えて、管周辺の細粒子を除去することを特徴としている。 In order to solve the above-described problems of the prior art, the water collecting pipe construction method of the present invention is a water collecting pipe construction method in which the water collecting pipe is constructed from the side wall of the water collecting well toward the surrounding aquifer. The water collecting pipe inserted into the pipe is vibrated to remove fine particles around the pipe.
この場合において、前記集水管を前記帯水層に前記集水管の施工箇所の土を押し出しながら圧入して管周辺に粗粒層を形成する圧入工程と、前記集水管に振動を加えて、前記管周辺の粗粒層の細粒子を除去する振動工程と、を同時に又は繰り返し行うとよい。 In this case, the water collecting pipe is pressed into the aquifer while extruding the soil at the construction site of the water collecting pipe to form a coarse layer around the pipe, and vibration is applied to the water collecting pipe, The vibration step for removing fine particles in the coarse layer around the tube may be performed simultaneously or repeatedly.
本発明の集水管の施工装置は、集水井の側壁から周囲の帯水層に向けて集水管を施工する集水管の施工装置において、前記帯水層に挿入した前記集水管に振動を加えて、管周辺の細粒子を除去する振動手段を備えたことを特徴としている。 The water collecting pipe construction device of the present invention is a water collecting pipe construction device for constructing a water collecting pipe from the side wall of the water collecting well toward the surrounding aquifer, and applies vibration to the water collecting pipe inserted into the aquifer. Further, the present invention is characterized in that a vibration means for removing fine particles around the tube is provided.
この場合において、前記集水管を前記帯水層に前記集水管の施工箇所の土を押し出しながら圧入して前記管周辺に粗粒層を形成する圧入手段と、前記振動手段と前記圧入手段を同時に又は繰り返し行う制御手段と、を備えているとよい。 In this case, the water collecting pipe is press-fitted into the aquifer while extruding the soil at the construction site of the water collecting pipe to form a coarse layer around the pipe, and the vibration means and the press-fitting means are simultaneously used. Or it is good to provide the control means to perform repeatedly.
本発明の集水管の施工構造は、集水井の側壁から周囲の帯水層に向けて集水管を施工した集水管の施工構造において、前記帯水層に挿入した前記集水管に振動を加えて、前記集水管の管周辺の細粒子を除去して前記管周辺に粗粒層を形成したことを特徴としている。 The construction structure of the water collecting pipe of the present invention is the construction structure of the water collecting pipe in which the water collecting pipe is constructed from the side wall of the water collecting well toward the surrounding aquifer, and vibration is applied to the water collecting pipe inserted into the aquifer. The fine particles around the water collecting pipe are removed to form a coarse layer around the pipe.
上記構成による本発明の集水管の施工方法、集水管の圧入装置、集水管の施工構造によれば、集水管の管周辺に細粒子が除かれた粗粒子の層（粗粒層）、換言すれば、集水管の管周辺を粗粒子で覆った粗粒層を形成することができる。これにより、集水管が細粒子によって目詰まりして取水が低下することなく、長期間の安定した大量取水を行うことができる。
また、帯水層に直に集水管を圧入することにより、作業時間を短縮して、作業効率を向上できると共に、作業の安全性を確保することができる。
According to the construction method of the water collecting pipe of the present invention, the press-fitting device of the water collecting pipe, and the construction structure of the water collecting pipe, the coarse particle layer (coarse particle layer) from which fine particles are removed around the pipe of the water collecting pipe, in other words, By doing so, it is possible to form a coarse particle layer in which the periphery of the water collecting pipe is covered with coarse particles. Thereby, long-term stable large-scale water intake can be performed without the water collection pipe being clogged with fine particles and the water intake being lowered.
In addition, by pressing the water collecting pipe directly into the aquifer, the working time can be shortened, the working efficiency can be improved, and the safety of the work can be ensured.
本発明の集水管の施工方法、集水管の圧入装置、集水管の施工構造の実施形態を添付の図面を参照しながら、以下詳細に説明する。本発明の施工対象となる集水井１は、図７に示すような地下水を貯留する円筒形状の井筒２と、井筒２の内壁から外側に向けて突出する集水管３と、井筒２に貯留される地下水を地上へ汲み上げるポンプ（不図示）から構成されている。集水管３は、井筒２の周囲の帯水層４の地下水を、表面に設けた複数の集水孔から集水している。集水管３は、井筒２の内壁から周囲の帯水層４に向けて水平方向であって放射状に複数突出している。そして、このような水平方向の放射状に突出した複数の集水管３が、垂直方向（井筒２の軸芯）に沿って多段に形成されている。 DESCRIPTION OF EMBODIMENTS Embodiments of a water collection pipe construction method, a water collection pipe press-fitting device, and a water collection pipe construction structure of the present invention will be described below in detail with reference to the accompanying drawings. A drainage well 1 to be constructed according to the present invention is stored in a cylindrical well 2 that stores groundwater as shown in FIG. 7, a drainage pipe 3 that protrudes outward from the inner wall of the well 2, and the well 2. It consists of a pump (not shown) that pumps groundwater into the ground. The water collecting pipe 3 collects groundwater of the aquifer 4 around the well 2 from a plurality of water collecting holes provided on the surface. A plurality of the water collecting pipes 3 project in a radial direction from the inner wall of the well 2 toward the surrounding aquifer 4 in a radial direction. And the several water collection pipe | tube 3 which protruded in the radial direction of such a horizontal direction is formed in multiple steps along the perpendicular direction (axial core of the well 2).
図１は本発明の集水管の施工装置の説明図であり、（１）は平面図、（２）は側面図、（３）は正面図である。図２は集水管の施工装置による集水管の圧入前の側面図である。図３は集水管の施工装置による集水管の圧入後の側面図である。図示のように本発明の集水管の施工装置１０（以下、単に施工装置という）は、足場に設置する脚部１２と、集水管３を帯水層４へ圧入する圧入手段２０と、圧入した集水管３に振動を加える振動手段３０と、圧入手段２０と振動手段３０を制御する制御手段４０と、を主な基本構成としている。
脚部１２は、圧入手段２０と振動手段３０を支持している。
FIG. 1 is an explanatory view of a water collecting pipe construction device according to the present invention, wherein (1) is a plan view, (2) is a side view, and (3) is a front view. FIG. 2 is a side view of the water collecting pipe before being press-fitted by the water collecting pipe construction device. FIG. 3 is a side view after the water collecting pipe is press-fitted by the water collecting pipe construction device. As shown in the drawing, a water collecting pipe construction device 10 (hereinafter simply referred to as a construction device) of the present invention is press-fitted with a leg 12 installed on a scaffold, a press-fitting means 20 for press-fitting the water collecting pipe 3 into the aquifer 4. The vibration unit 30 that applies vibration to the water collecting pipe 3 and the control unit 40 that controls the press-fitting unit 20 and the vibration unit 30 are mainly configured.
The leg portion 12 supports the press-fitting means 20 and the vibration means 30.
圧入手段２０は、井筒２の側壁から周囲の帯水層４に集水管３を圧入する手段である。本実施形態の圧入手段２０は、一例として圧入シリンダーを用いている。圧入手段２０は、本体に、スライドヘッド２２と、圧入シリンダー（不図示）と、スライドガイド（不図示）とを備えている。 The press-fitting means 20 is a means for press-fitting the water collecting pipe 3 from the side wall of the well 2 into the surrounding aquifer 4. The press-fitting means 20 of the present embodiment uses a press-fitting cylinder as an example. The press-fitting means 20 includes a slide head 22, a press-fitting cylinder (not shown), and a slide guide (not shown) on the main body.
スライドヘッド２２は、圧入する集水管３を支持すると共に、圧入本体に対して圧入方向へスライドするサポート部材である。スライドヘッド２２は、上部に集水管３の端部を挟持する挟持部２３と振動手段３０を取り付けている。またスライドヘッド２２は、下部に圧入シリンダーのシリンダーシャフトを接続させている。 The slide head 22 is a support member that supports the water collecting pipe 3 to be press-fitted and slides in the press-fitting direction with respect to the press-fitting main body. The slide head 22 has a clamping part 23 and a vibration means 30 that clamp the end of the water collecting pipe 3 at the top. The slide head 22 has a cylinder shaft of a press-fit cylinder connected to the lower part thereof.
圧入シリンダーは、シリンダーシャフトを圧入本体に対して圧入方向に往復運動させている。圧入シリンダーは、圧入本体上に圧入方向に沿って複数並べて配置することができる。圧入シリンダーは、駆動源として油圧、空気圧等を用いることができる。 The press-fit cylinder reciprocates the cylinder shaft in the press-fit direction with respect to the press-fit body. A plurality of press-fit cylinders can be arranged side by side along the press-fit direction on the press-fit body. The press-fitting cylinder can use hydraulic pressure, air pressure, or the like as a drive source.
スライドガイドは、スライドヘッド２２を圧入方向へスライドするように支持するガイドである。
このような構成の圧入手段２０は、スライドヘッド２２の挟持部２３で集水管３を挟持しながら、圧入シリンダーの往復運動によって、スライドヘッド２２が圧入本体に対して集水管３の圧入方向へスライドして集水管３を帯水層４へ圧入することができる。
The slide guide is a guide that supports the slide head 22 so as to slide in the press-fitting direction.
The press-fitting means 20 having such a configuration slides the slide head 22 in the press-fitting direction of the water collecting pipe 3 with respect to the press-fitting main body by reciprocating movement of the press-fitting cylinder while holding the water collecting pipe 3 with the holding portion 23 of the slide head 22. Thus, the water collecting pipe 3 can be pressed into the aquifer 4.
振動手段３０は、帯水層４に挿入した集水管３に振動を加える手段である。本実施形態の振動手段３０は、一例としてエアーノッカーを用いている。振動手段３０は、スライドヘッド２２の上部に１個以上、好ましくは２個以上取り付けるとよい。振動手段３０は、圧縮空気によって内部のピストン３２が飛び出す構成であり、挟持部２３を介して集水管３に周期的に振動を与えることができる。なお振動手段３０は、集水管３に振動を与えることができる構成であれば、エアーノッカーの他にも、電磁ノッカー、エアー式ピストンバイブレーター等を適用することができる。 The vibration means 30 is means for applying vibration to the water collecting pipe 3 inserted into the aquifer 4. The vibration means 30 of this embodiment uses an air knocker as an example. One or more vibration means 30 may be attached to the upper portion of the slide head 22, preferably two or more. The vibration means 30 has a configuration in which the internal piston 32 is ejected by the compressed air, and can periodically vibrate the water collecting pipe 3 via the holding portion 23. In addition, if the vibration means 30 is the structure which can give a vibration to the water collection pipe 3, an electromagnetic knocker, an air-type piston vibrator, etc. other than an air knocker can be applied.
制御手段４０は、圧入手段２０と、振動手段３０と電気的に接続されている。制御手段４０は、帯水層４の粗粒子の状態に応じて、圧入手段２０による圧入工程と、振動手段３０による振動工程を同時に、又は繰り替えし行うように制御することができる。 The control means 40 is electrically connected to the press-fitting means 20 and the vibration means 30. The control means 40 can control the press-fitting process by the press-fitting means 20 and the vibration process by the vibration means 30 to be performed simultaneously or repeatedly according to the state of coarse particles in the aquifer 4.
次に、上記構成による集水管の施工装置を用いた施工方法について以下説明する。図４は本発明の集水管の施工方法の説明図である。図５は本発明の集水管の施工構造の説明図である。図４（１）に示すように、井筒２の壁面に形成された挿入孔５に集水管３を圧入可能な位置に施工装置１０を配置する。 Next, a construction method using the water collecting pipe construction device having the above-described configuration will be described below. FIG. 4 is an explanatory view of the construction method of the water collecting pipe of the present invention. FIG. 5 is an explanatory view of the construction structure of the water collecting pipe of the present invention. As shown in FIG. 4 (1), the construction apparatus 10 is arranged at a position where the water collecting pipe 3 can be press-fitted into the insertion hole 5 formed in the wall surface of the well 2.
次に、集水管３の端部をスライドヘッド２２の挟持部２３で挟持して、集水管３を施工装置１０に装着する（図２）。そして圧入手段２０の圧入シリンダーを伸長させて集水管３を挿入孔５から帯水層４へ圧入する。なお集水管３は帯水層４の現場状況によって長さが決まり、長尺となる場合には順次継ぎ足しできるように構成されている。１本目の集水管３の圧入工程が完了した後（図３）、２本目の集水管３を継ぎ足す場合には、挟持部２３の挟持状態を解除して、１本目の集水管３を開放し、圧入シリンダーを後退させる。そして２本目の集水管３の端部を同様にスライドヘッド２２の挟持部２３で挟持して集水管３を施工装置１０に装着する（図４（２））。以下、同様の作業を集水管３が設定長さとなるまで繰り返し行う。 Next, the end part of the water collecting pipe 3 is clamped by the clamping part 23 of the slide head 22, and the water collecting pipe 3 is attached to the construction apparatus 10 (FIG. 2). Then, the press-fitting cylinder of the press-fitting means 20 is extended to press-fit the water collecting pipe 3 from the insertion hole 5 into the aquifer 4. The length of the water collecting pipe 3 is determined depending on the situation of the aquifer 4 and is constructed so that it can be added sequentially when it becomes long. After the press-fitting process of the first water collecting pipe 3 is completed (FIG. 3), when the second water collecting pipe 3 is added, the holding state of the holding portion 23 is released and the first water collecting pipe 3 is opened. Then retract the press-fit cylinder. And the end part of the 2nd water collecting pipe 3 is similarly clamped by the clamping part 23 of the slide head 22, and the water collecting pipe 3 is mounted | worn with the construction apparatus 10 (FIG. 4 (2)). Thereafter, the same operation is repeated until the water collecting pipe 3 reaches the set length.
帯水層４に集水管３を圧入する工程では、図５（１）に示すように、集水管３を圧入することにより、帯水層４における集水管の施工箇所の粗粒子を押し出して、管周辺の領域には粗粒子と細粒子が密な状態となる。 In the step of press-fitting the water collection pipe 3 into the aquifer 4, as shown in FIG. 5 (1), by pushing the water collection pipe 3, the coarse particles at the construction site of the water collection pipe in the aquifer 4 are extruded, Coarse particles and fine particles are dense in the area around the tube.
次に、帯水層４に圧入された集水管３に振動を加える（図４（３））。スライドヘッド２２の挟持部２３で集水管３を挟持している状態で、振動手段３０を作動させる。本実施形態の振動手段３０は、エアーノッカー式を用いており、圧縮空気によって内部のピストン３２がスライドヘッド２２に向けて飛び出す。このような振動手段３０の構成により、挟持部２３を介して集水管３に周期的に振動を与えることができる。 Next, vibration is applied to the water collecting pipe 3 press-fitted into the aquifer 4 (FIG. 4 (3)). The vibration means 30 is operated in a state where the water collecting pipe 3 is held by the holding portion 23 of the slide head 22. The vibration means 30 of the present embodiment uses an air knocker type, and the internal piston 32 jumps out toward the slide head 22 by the compressed air. With such a configuration of the vibration means 30, vibration can be periodically applied to the water collection pipe 3 through the clamping portion 23.
集水管３に振動を加える工程では、図５（２）に示すように、振動によって集水管３の管周辺の土から集水孔の孔径以下の細粒子を集水管３内へ導くことができる。これによって、集水管３の周辺には、集水孔の孔径以上の粗粒子が多く存在する粗粒層が形成される。 In the step of applying vibration to the water collecting pipe 3, as shown in FIG. 5 (2), fine particles having a diameter equal to or smaller than the diameter of the water collecting hole can be guided into the water collecting pipe 3 from the soil around the pipe of the water collecting pipe 3 by vibration. . As a result, a coarse particle layer in which a large number of coarse particles larger than the diameter of the water collection holes are present is formed around the water collection pipe 3.
このような圧入工程と振動工程は、帯水層４の現場状況に応じて、制御手段４０により、同時に又は繰り返し行うことができる。すなわち、集水管３を継ぎ足す場合には、集水管３を１本圧入した後に振動工程を行う。そして２本目の集水管３も同様に圧入後に振動工程を行う工程を繰り返すことができる。また、継ぎ足す集水管３毎に圧入工程と振動工程を同時に行うようにすることもできる。これにより集水管３の管周辺の土層構成を高い取水能力とし、目詰まりが起こりにくい構造とすることができる。 Such a press-fitting process and a vibration process can be performed simultaneously or repeatedly by the control means 40 according to the field situation of the aquifer 4. That is, when adding the water collecting pipe 3, the vibration process is performed after one water collecting pipe 3 is press-fitted. And the process which performs a vibration process after press-fitting similarly to the 2nd water collecting pipe 3 can be repeated. In addition, the press-fitting process and the vibration process can be simultaneously performed for each of the collecting pipes 3 to be added. Thereby, the soil layer structure around the pipe of the water collecting pipe 3 can have a high water intake capacity, and a structure in which clogging hardly occurs can be achieved.
また細粒子を集水管の内側から高圧エアーや高圧水で除去する方式では、集水孔から外側に面する細粒子を除去することはできるが、集水孔が形成されていない管周辺の細粒子は除去することができない。しかし本発明の振動工程によれば、集水管に振動を加えることによって、管周辺の細粒子を集水孔から集水管内へ導入することによって取り除くことができる。 In the method of removing fine particles from the inside of the water collection pipe with high-pressure air or high-pressure water, fine particles facing the outside can be removed from the water collection hole, but the fine particles around the pipe where the water collection hole is not formed can be removed. The particles cannot be removed. However, according to the vibration process of the present invention, by applying vibration to the water collecting pipe, fine particles around the pipe can be removed by introducing the water into the water collecting pipe from the water collecting hole.
帯水層４に集水管３を圧入した際に、粗粒子を集水管周辺に配しつつ、細粒子を排除できたことを確認するため、振動時に集水管内か流出する土砂を採取して粒土試験を行った。図６は本発明の集水管の施工方法及び二重管掘削方式により採取した粒土試験の説明図である。同図の横軸は粒径（ｍｍ）を示し、縦軸は通過質量百分率（％）を示している。図中の丸印は本発明の施工方法であり、菱形印は二重管掘削方式をそれぞれ示している。図示のように、本発明の圧入振動方式は、二重管掘削方式に比べて、集水管３の管内より除去される土砂が細かいことがわかる。また最大粒径は、本発明の場合９．５ｍｍ、二重管掘削方式の場合２６．５ｍｍであった。このように本発明の施工方法により管内から排除された土砂が、二重管掘削方式により管内から排除された土砂に対して細かいことから、粗粒子を集水管の管周辺に配し、細粒子が取り除かれたことがわかる。従って本発明の施工方法は、従来の二重管掘削方式と比べて、集水管の管周辺の土層構造を目詰まりしにくい構造とすることがわかる。 In order to confirm that fine particles could be eliminated while placing coarse particles around the water collecting pipe 3 when the water collecting pipe 3 was press-fitted into the aquifer 4, the sediment flowing out from the water collecting pipe during vibration was collected. A grain soil test was conducted. FIG. 6 is an explanatory view of the soil test collected by the method of constructing the water collecting pipe and the double pipe excavation method of the present invention. In the figure, the horizontal axis indicates the particle size (mm), and the vertical axis indicates the passing mass percentage (%). The circles in the figure indicate the construction method of the present invention, and the diamonds indicate the double pipe excavation method. As shown in the figure, the press-fitting vibration method of the present invention shows that the earth and sand removed from the pipe of the water collecting pipe 3 is finer than the double pipe excavation method. The maximum particle size was 9.5 mm for the present invention and 26.5 mm for the double pipe excavation method. Thus, since the earth and sand excluded from the pipe by the construction method of the present invention is fine with respect to the earth and sand excluded from the pipe by the double pipe excavation method, the coarse particles are arranged around the pipe of the water collecting pipe, and the fine particles You can see that has been removed. Therefore, it can be seen that the construction method of the present invention has a structure in which the soil layer structure around the pipe of the water collecting pipe is less likely to be clogged as compared with the conventional double pipe excavation method.
なお本発明の集水管の施工方法、集水管の施工装置は、二重管掘削方式によって帯水層に挿入された集水管に対しても行うことができる。すなわち、二重管掘削方式により帯水層に挿入された集水管に振動を加えることにより、管周辺の細粒子を除去することができ、上記実施形態と同様の効果が得られる。 In addition, the construction method of the water collection pipe | tube of this invention and the construction apparatus of a water collection pipe | tube can be performed also with respect to the water collection pipe inserted in the aquifer by the double pipe excavation system. That is, by applying vibration to the water collecting pipe inserted into the aquifer by the double pipe excavation method, fine particles around the pipe can be removed, and the same effect as in the above embodiment can be obtained.
本発明の集水管の施工方法、集水管の圧入装置、集水管の施工構造は、取水、排水、水抜き等の水平ボーリング工事分野及び給排水、空調産業分野において特に有用である。 The water collecting pipe construction method, the water collecting pipe press-fitting device, and the water collecting pipe construction structure of the present invention are particularly useful in the field of horizontal boring work such as water intake, drainage and drainage, and in the water supply and drainage and air conditioning industries.
１………集水井、２………井筒、３………集水管、４………帯水層、５………挿入孔、６………粗粒子、７………細粒子、８………二重管、８ａ………内管、８ｂ………外管、９………パッキン、１０………集水管の施工装置、１２………脚部、２０………圧入手段、２２………スライドヘッド、２３………挟持部、３０………振動手段、３２………ピストン、４０………制御手段。 1 ......... Catchment well, 2 ...... Isuzu, 3 ...... Catchment pipe, 4 ...... Aquifer, 5 ...... Insertion hole, 6 ...... Coarse particles, 7 ...... Fine particles, 8 ......... Double pipe, 8a ......... Inner pipe, 8b ......... Outer pipe, 9 ......... Packing, 10 ......... Water collecting pipe construction device, 12 ......... Legs, 20 ......... Press-fitting means , 22... Slide head, 23... Clamping part, 30... Vibration means, 32.
Claims (5)
前記帯水層に挿入した前記集水管に振動を加えて、管周辺の細粒子を除去することを特徴とする集水管の施工方法。 In the construction method of the water collection pipe that constructs the water collection pipe from the side wall of the water collection well toward the surrounding aquifer,
A method for constructing a water collecting pipe, wherein vibrations are applied to the water collecting pipe inserted into the aquifer to remove fine particles around the pipe.
前記集水管を前記帯水層に前記集水管の施工箇所の土を押し出しながら圧入して管周辺に粗粒層を形成する圧入工程と、
前記集水管に振動を加えて、前記管周辺の細粒子を除去する振動工程と、
を同時に又は繰り返し行うことを特徴とする集水管の施工方法。 In the construction method of the water collecting pipe of Claim 1,
A press-fitting step of press-fitting the water collecting pipe into the aquifer while extruding soil at a construction location of the water collecting pipe to form a coarse grain layer around the pipe;
A vibration step of applying vibration to the water collecting pipe to remove fine particles around the pipe;
A method for constructing a water collecting pipe, characterized by performing the above simultaneously or repeatedly.
前記帯水層に挿入した前記集水管に振動を加えて、管周辺の細粒子を除去する振動手段を備えたことを特徴とする集水管の施工装置。 In the drainage pipe construction device that constructs the drainage pipe from the side wall of the drainage well toward the surrounding aquifer,
An apparatus for constructing a water collection pipe comprising vibration means for applying vibration to the water collection pipe inserted into the aquifer and removing fine particles around the pipe.
前記集水管を前記帯水層に前記集水管の施工箇所の土を押し出しながら圧入して管周辺に粗粒層を形成する圧入手段と、
前記振動手段と前記厚入手段を同時に又は繰り返し行う制御手段と、
を備えたことを特徴とする集水管の施工装置。 In the construction apparatus of the water collection pipe of Claim 3,
A press-fitting means for press-fitting the water collecting pipe into the aquifer while extruding soil at a construction location of the water collecting pipe to form a coarse grain layer around the pipe;
Control means for performing the vibration means and the thickness insertion means simultaneously or repeatedly;
A drainage pipe construction device characterized by comprising:
前記帯水層に挿入した前記集水管に振動を加えて、前記集水管の管周辺の細粒子を除去して前記管周辺に粗粒層を形成したことを特徴とする集水管の施工構造。 In the construction structure of the drainage pipe that constructed the drainage pipe from the side wall of the drainage well to the surrounding aquifer,
A construction structure of a water collecting pipe, wherein a vibration is applied to the water collecting pipe inserted into the aquifer to remove fine particles around the pipe of the water collecting pipe to form a coarse particle layer around the pipe.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6206895B1 (en) * | 2017-04-11 | 2017-10-04 | 株式会社内外地下開発 | Renovation method for small-diameter wells and excavation equipment used therefor |
| KR102235049B1 (en) * | 2021-02-01 | 2021-03-31 | 김만겸 | Underground bedrock water collection device and underground rockwater collection method using the same |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5362153U (en) * | 1976-10-29 | 1978-05-26 | ||
| JPS5969588A (en) * | 1982-10-12 | 1984-04-19 | 入江 将雄 | Water collecting pipe joint in well |
| JPH0372967U (en) * | 1989-11-16 | 1991-07-23 | ||
| JPH05171632A (en) * | 1991-12-19 | 1993-07-09 | Shimizu Corp | Washing device and washing method of well |
| JP2008519926A (en) * | 2004-11-11 | 2008-06-12 | クラマス フォールズ インコーポレイテッド | Electroacoustic method and apparatus to facilitate mass transfer process for enhanced production recovery of wells |
| JP2009293219A (en) * | 2008-06-03 | 2009-12-17 | Kajima Corp | Permeability maintenance method for methane hydrate reservoir |
-
2011
- 2011-08-04 JP JP2011171116A patent/JP2013036177A/en active Pending
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5362153U (en) * | 1976-10-29 | 1978-05-26 | ||
| JPS5969588A (en) * | 1982-10-12 | 1984-04-19 | 入江 将雄 | Water collecting pipe joint in well |
| JPH0372967U (en) * | 1989-11-16 | 1991-07-23 | ||
| JPH05171632A (en) * | 1991-12-19 | 1993-07-09 | Shimizu Corp | Washing device and washing method of well |
| JP2008519926A (en) * | 2004-11-11 | 2008-06-12 | クラマス フォールズ インコーポレイテッド | Electroacoustic method and apparatus to facilitate mass transfer process for enhanced production recovery of wells |
| JP2009293219A (en) * | 2008-06-03 | 2009-12-17 | Kajima Corp | Permeability maintenance method for methane hydrate reservoir |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6206895B1 (en) * | 2017-04-11 | 2017-10-04 | 株式会社内外地下開発 | Renovation method for small-diameter wells and excavation equipment used therefor |
| KR102235049B1 (en) * | 2021-02-01 | 2021-03-31 | 김만겸 | Underground bedrock water collection device and underground rockwater collection method using the same |
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