JP2004084766A

JP2004084766A - Method for burying underground pipe body

Info

Publication number: JP2004084766A
Application number: JP2002245626A
Authority: JP
Inventors: Koki Fukui; 福井　弘毅
Original assignee: Totaku Industries Inc
Current assignee: Totaku Industries Inc
Priority date: 2002-08-26
Filing date: 2002-08-26
Publication date: 2004-03-18
Also published as: CN1495979A

Abstract

<P>PROBLEM TO BE SOLVED: To provide an underground burying method for easily and rapidly performing the underground pipe burying work without any changes or machining of an uneven pipe while taking an advantage of the uneven pipe of a special shape. <P>SOLUTION: When a plurality of rows of parallel pipe bodies P with a pipe wall 1 formed uneven in the axial direction, the sectional shape of a projecting part 2 formed rectangular, and the sectional shape of a recessed part 3 formed circular are arranged in a groove G excavated in the ground, a spacer S is arranged between the pipe rows of the pipe bodies P and P at an interval of adequate length in the pipe longitudinal direction, and the pipe bodies are arranged while keeping a predetermined space D. Then, the excavated groove G is totally refilled and earth-covered including the space D. In another method, when pipe bodies P of a plurality of parallel rows/stacks are arranged in the groove G, the spacer S is arranged between the rows of the pipe bodies P and P at an interval of adequate length in the pipe longitudinal direction, the predetermined space D is kept, and the entire excavated groove G is re-filled and covered including the space D. <P>COPYRIGHT: (C)2004,JPO

Description

【０００１】
【発明の属する技術分野】
本発明は、主として光ファイバーケーブルや電力線・電話線等を内部に挿通し収容させて保護するための合成樹脂管体を、例えば３列，４列等必要本数を、地面を掘削した溝内に配列配管し、または、これらの複数列を２段，３段，４段等と複数段積み重ね状として配管し、多孔管路として使用する地中埋設管体の埋設方法に関するものである。
【０００２】
而して、本発明方法にいう管体は、管壁が軸方向に凹凸状に形成されていて、凸状部の断面形状が方形状に形成され、凹状部の断面形状が円形状に形成されている形状とした合成樹脂管体を対象としたものである。
【０００３】
【従来の技術】
従来から、管壁を螺旋凹凸状とし、凸状部も凹状部もその断面形状を円形状に形成した一般的な合成樹脂製の円形螺旋管を地中に埋設して電線保護管や送水管として使用することは広く知られている。また、このような円形螺旋管を複数本平行に配管し、多くの場合は、横一列に一段に並列配管されるが、これらの管体を長さ方向に比較的短いスパンで連結金具を用いて収束させることによって、上下方向に所定の空間を保たせた状態で、複数列・複数段に積み重ね状とした多孔管路の形成手段についても既に知られている。
【０００４】
他方、本発明が対象としている前記の、管壁の形状を環状凹凸状とし、凸状部の断面形状を方形状とし、凹状部の断面形状を円形状とした形状の合成樹脂管体（以下これを特殊形状凹凸管という）は、本出願人等の出願があり、既に公知になっている（特開平８ー２１９３３３号公報参照）。
【０００５】
【発明が解決しようとする課題】
而して、前記円形螺旋管の場合には、配管に際して、周方向に回転し易く位置安定性が悪く、殊に、地中に平行配管させて多孔管路を形成するに当たっては、それぞれの管体間に土砂が入り込んで直行性が乱され蛇行し易く、ケーブル等を内部に挿通する作業に当たって、管路が蛇行している場合には配線抵抗が著しく大きくなり、ケーブル挿通作業の困難性を招き易いという課題を有している。また、自然状態では積み重ね配管ができにくく、前記のように、収束用の連結金具を用いて短いスパンで連結させなければ積み重ね状に配管することが困難であるという課題をも有してる。
【０００６】
本発明は、このような従来の一般的な円形螺旋管が有している課題に着目し、この従来管がもつ課題を解決することを目的として、この一般的な円形螺旋管の使用を排し、前記の特殊形状凹凸管Ｐのみを対象とし、この特殊形状凹凸管Ｐがもつ方形凸状壁２の鉛直方向と水平方向の平坦壁を利用して、横並び方向と上下方向とに互いに平行に安定よく並列姿勢と積み重ね姿勢とに配管させることが容易にできるという利点を利用し、このような管体を地中に並列平行配管させ、または複数列・複数段平行積層配管させてある多孔管路を形成しようとするものである。
【０００７】
しかるところ、この特殊形状凹凸管Ｐにあっては、掘削溝内に複数列または複数列・複数段密着させて単一のブロック体状として配管させると、配管後に、隣り合う円形壁部分（凹部）３，３間にできる小空間内に砂や土砂等の充填物を圧し固めて充填した後に、当該掘削溝を埋め戻し覆土させていた。しかしながら、この小空間内に砂や土砂等の充填物を充分に圧し固めて充填する作業は、時間と労力を必要とするものであった。
【０００８】
そこで、本発明者は、このような隙間充填方法から発想を転換し、前記の特殊形状凹凸管Ｐが備えている利点を最大限に生かしながら、また、この特殊形状凹凸管Ｐに一切の変更や加工を加えることなく、そのまま利用する手段でありながら、地中への埋設配管作業が極めて容易かつ迅速にできる地中埋設方法をここに提供することを目的とする。
【０００９】
【課題を解決するための手段】
この目的を達成するために講じた本発明にいうところの地中埋設管体の埋設方法の一つは、管壁１が軸方向に凹凸状に形成され、凸部２の断面形状が方形状で凹部３の断面形状が円形状に形成されている管体Ｐを、地面を掘削した溝Ｇに複数列平行配管する方法であって、該配管時に管長方向の適宜の長さ間隔毎に、管体Ｐ，Ｐどうしの管列間にスペーサーＳを配置し、所定の間隔空間Ｄを保持させて配管し、その後、該間隔空間Ｄ内を含めて掘削溝Ｇの全体を埋め戻し覆土することを手段とする。
【００１０】
他のもう一つの方法は、管壁１が軸方向に凹凸状に形成され、凸部２の断面形状が方形状で凹部３の断面形状が円形状に形成されている管体Ｐを、地面を掘削した溝Ｇに複数列・複数段積み重ねて積み重ね平行配管する方法であって、該配管時に管長方向の適宜の長さ間隔毎に、管体Ｐ，Ｐどうしの管列間にスペーサーＳを配置し、所定の間隔空間Ｄを保持させて配管し、その後、該間隔空間Ｄ内を含めて掘削溝Ｇの全体を埋め戻し覆土することを手段とする。
【００１１】
【発明の実施の形態】
これらの方法を実施するに当たっては、積み重ね配管した配管列の両外側部分に、管体Ｐ…の外側への姿勢のずれを阻止させるための杭材ｋ，ｋ…を管長方向の適宜の長さ間隔毎に打ち込んで立設しておく作業工程を含ませてもよい。この杭材ｋ，ｋ…の打ち込み立設は、積み重ね配管前でも、配管後でもよいが、後述する管体Ｐを挟み込むＵ字形の切り込み凹部を備えたスペーサーＳを外側の管列に使用する場合とか、上下２段重ね程度の積層配管の場合には必ずしも必要な手段ではない。
【００１２】
また、本発明にいうところの配管方法に使用するスペーサーＳは、第１実施例とその変形例に示すところの、管列間に介在させる平板状としたもの（図１〜８のもの）や、第２実施例とその変形例に示すところの、管体Ｐを挟持させるためのＵ字形に切り込んだ凹部２５を備えたもの（図９〜１４のもの）とすることができる。
【００１３】
更には、第３実施例とその変形例に示すところの、隣り合う管列の管体Ｐ，Ｐ間に間隔空間Ｄを形成するスペーサーＳであって、間隔保持部３１の左右方向の両側にＣ字形に形成した弾性嵌合部３２を形成したもの（図１５〜１９のもの）や、片方のみをＣ字形の弾性嵌合部３２とし、他方を管体への接当部３３または挟持部としてあるもの（図２０〜２２のもの）や、更に、間隔保持部３１の左右方向の両側を管体への接当部３３または挟持部としてあるもの（図２３〜２５のもの）等とすることができる。このようにして、各管列間に所定の間隔空間Ｄを形成する構造としたスペーサーを使用することができる。
【００１４】
本発明にいうところの管体Ｐは、地中に埋設して使用するものであるから、その形成素材は、ポリエチレンやポリプロピレン等のポリオレフィン系樹脂のような非塩素系樹脂が好ましく、耐圧性と耐水性に富み経時劣化の少ない合成樹脂素材を用いて形成した管が適している。また、管に強度や難燃性の性能を求められる場合は、ポリ塩化ビニル樹脂を用いてもよい。
【００１５】
【実施例】
次に、本発明の実施例について、添付の図面に基づいて説明する。図１乃至図４は、本発明の第１実施例を説明する図である。図１は管体を複数列・複数段積み上げた配管状態を示した縦断面図であり、図２は配管状態の一部を示した斜視図、図３はこの実施例に示したスペーサーを示す正面図、図４は配管作業後の状態を示した縦断面図である。
【００１６】
この第１実施例を含め本発明が対象とする管体Ｐは、図２に示したように、管壁１の形状を管軸方向において環状の凹凸波形となるようにし、この凹凸波形の凸部２の断面形状を角部を丸めたほぼ正方形状とし、管軸方向においてこの凸部２と凸部２との間を繋ぐ凹部３の断面形状を真円形状とし、これらの凸部２と凹部３とが交互に連続する形状に形成してある管体である。
【００１７】
このような構造とした管体Ｐを、地中に埋設して多孔管路を形成する手段について説明する。以下にいう各実施例では、図１及び図２に示したように、管体Ｐを横に３列、各列縦に３段積みとして、合計９本の管体Ｐ…を配管する場合の実施例として説明してある。
【００１８】
先ず、管路を形成しようとする地面１０を所要幅・所要深さに掘削して配管に必要な幅と深さを備えた溝Ｇを形成する。必要であればその底面に礫や砂等１１を敷き詰めて溝底をほぼ平坦に形成する。しかる後、この溝底上に複数列・複数段、この実施例では、先ず３本の管体Ｐ…を並列状態に配管して、その管間に、図３に示したように、平板状の矢板状でその厚みを管体Ｐにおける凹部３の管軸方向の幅とほぼ等しいか少し薄めに形成したスペーサーＳの先端を地中に打ち込んで立て、外列の管体Ｐの外側にも杭ｋ，ｋを立てて第１段目の管列を形成する。続いて、これらの各管体Ｐ上に、別の管体Ｐ…をそれぞれ２本づつ積み重ねるか、または１本づつ積み重ねた上に、更に１本づつ積み重ねて、３列３段積み合計９本の管体Ｐ…を図１のように配管する。この配管の順序は、この通りでなければならないものではなく、例えば管体Ｐ…を３列３段に予め積み上げた状態で各列間にスペーサーＳを差し込んで列を整えるとか、一列づつ３段積みに積み上げるとか、作業手順に従って最も容易な方法で配管すればよい。
【００１９】
このようにして配管した後、各管列間に形成した間隙空間Ｄ内に適宜の土砂や礫、掘削土等を投入して埋込み、または埋込みながら、溝Ｇの全体を掘削土で埋め戻して、図４に示したように管上全体を覆土する。
【００２０】
図５及び図６、図７及び図８は、それぞれ該第１実施例に示したスペーサーＳの変形例について示したものであって、図５及び図６に示した変形例は、スペーサーＳの構造を、横幅方向の両側に管体Ｐの凹部３と接する凹入部２１を形成してあるものとし、横幅方向の中間部に縦長の貫通孔２２を形成して素材の少量化と重量の軽量化とを図ったものとしてある。図５に示した配管方法は、前記第１実施例に準ずる。
【００２１】
図７及び図８に示した変形例は、スペーサーＳの構造を、下端部に、横幅方向に向かって突出させた突出部２４を一体的に備えている形状とし、その上面を管体Ｐの凹部３を載置させるための受け部２３に形成し、この受け部２３上に第１段目の管体Ｐを配管することによって、配管位置を確定できるようにしたものである。また、この変形例のものにあっては、この受け部２３の上方に凹入部２１を形成し、横幅方向の中間部に貫通孔２２を形成してある構造としてある。
【００２２】
図９乃至１４は、スペーサーＳが管体Ｐを挟持させるためのＵ字形に切り込んだ凹部２５を備えているものとした第２実施例とその変形例について示したものである。図９及び図１０は第２実施例を示し、そのスペーサーＳは、長方形状の板状であって、その横幅方向の一方に偏った位置に、管体Ｐの凹部３の横幅に相当する幅のＵ字形に切り込んだ凹部２５を形成し、広幅に残した板体部分の横幅を、管体Ｐ，Ｐ間に形成する間隔幅に設定してある。このようにしたスペーサーＳを図９に示したように、掘削溝Ｇの底にＵ字形凹部２５を上方解放状に立て、そのＵ字形凹部２５内に管体Ｐを落とし込むようにして積み上げる。このスペーサーＳを図９における左側のものとすると、右側に広幅板体部分が配置されるので、その右側に中間列の配管用空間を隔てて左右対称的に他のスペーサーＳを配置し、この中間配管用空間と右側スペーサーＳのＵ字形凹部２５とに管体Ｐを配管すればよい。この変形例としては、Ｕ字形凹部２５の左右の板部分をそれぞれ管体Ｐ，Ｐ間に形成する間隔幅に設定してあるものとし、そのＵ字形凹部２５内に中間列の管体Ｐを配管し、左右板の外側に左側管列と右側管列とを形成するようにすることもできる。
【００２３】
図１１及び図１２に示した変形例は、スペーサーＳの構造を、該第２実施例に示した板体よりも幅狭の板体とし、横幅方向の中間部分にＵ字形に切り込んだ凹部２５を形成し、残された左右の板幅をほぼ同幅のものとし、これを適宜任意の横方向間隔を隔てて配置し、図１１に示したように、それぞれのＵ字形凹部２５内に管体Ｐを落とし込むようにして配管するようにしたものである。
【００２４】
図１３及び図１４に示した変形例は、スペーサーＳの構造を、該第２実施例に示した板体よりも広幅の板体とし、横幅方向の中間部分に管列間に形成する所要幅の板体部分を残して、その左右にＵ字形に切り込んだ凹部２５，２５を形成するとともに、その外側に細幅の板状部分を残した形状としたものである。このようにして、図１３に示したように、一方のスペーサーＳの片方のＵ字形凹部２５と他方のスペーサーＳの隣接側のＵ字形凹部２５とを一列に重なるように配置させて、それぞれのＵ字形凹部２５内に管体Ｐを落とし込むようにして配管するようにしたものである。
【００２５】
図１５乃至図２５は、隣り合う管列の管体Ｐ，Ｐ間に間隔空間Ｄを形成するスペーサーＳに関するものである。これらの内、図１５乃至図１９は第３実施例とその変形例を示すスペーサーＳは、左右方向の中間に位置する間隔保持部３１の両側にＣ字形に形成した弾性嵌合部３２，３２を備えたもの（図１５〜１９のもの）のグループと、これらの片方のみをＣ字形の弾性嵌合部３２として管体Ｐと嵌合させ、他方を管体への接当部３３または挟持部としてあるもの（図２０〜２２のもの）のグループと、更に、間隔保持部３１の両側を管体への接当部３３または挟持部としたもの（図２３〜２５のもの）のグループとに分けることができる。
【００２６】
而して、図１５及び図１６は、第３実施例を示し、そのスペーサーＳは、概略眼鏡形としてあり、隣り合う管体Ｐ，Ｐ間に形成する間隔空間Ｄの幅に相当する横方向長さに設定した間隔保持部３１の両側に、下向き開口のＣ字形に形成した弾性嵌合部３２，３２を一体的に形成してある構造としたものである。このようにしたスペーサーＳを配管時に、隣り合う管体Ｐ，Ｐの凹部３，３に対して前記開口部を上方から押し付け、弾性嵌合部３２，３２を一時的に開かせて凹部３，３に嵌合させるようにしたものである。
【００２７】
図１７及び図１８は、第３実施例を示したスペーサーＳの変形例について示したもので、該スペーサーＳの構造は、間隔保持部３１の両側に形成した弾性嵌合部３２，３２を、斜め外下向きに開口部が存在するＣ字形に形成したものであって、その他の点では第３実施例のスペーサーＳに準じたものである。また、図１９に示したスペーサーＳは、Ｃ字形弾性嵌合部３２，３２における開口部を横外向きに開口させた構造としたものである。
【００２８】
図２０乃至２２に示したスペーサーＳは、間隔保持部３１の片方のみに、前記Ｃ字形の弾性嵌合部３２を形成し、他方を管体への接当部３３または挟持部としたものについて示したものであって、弾性嵌合部３２を管体Ｐの凹部３と嵌合させ、他方の接当部３３または挟持部を他の管体に対して当て付けるか、挟み込む構造としたものである。
【００２９】
即ち、図２０のスペーサーＳは、Ｃ字形の弾性嵌合部３２を下向きに開口させたものとし、他方の接当部３３を、下向きＵ字形に連なる部分を備えていて、管体Ｐの凹部３を挟み込むようにした挟持部構造としたものである。図２１のスペーサーＳは、Ｃ字形弾性嵌合部３２の開口部を斜め外下向きに開口させてあるものとし、他方の接当部３３を、管体Ｐの凹部３の上方に嵌合させる円弧状部分を連接させてある構造としたものであり、また、図２２のスペーサーＳは、Ｃ字形弾性嵌合部３２の開口部を横外向きに開口させてあるものとし、他方の接当部３３を、管体Ｐの凹部３の上方に接当する横棒状部分を連接してある構造としたものである。
【００３０】
続く図２３乃至２５に示したスペーサーＳは、間隔保持部３１の左右両方に、管体への接当部３３，３３または挟持部を、左右対称形に形成させてある構造としたものであって、弾性嵌合部３２を管体Ｐの凹部３に対して当て付けて載置させるか、挟み込む構造としたものである。
【００３１】
即ち、図２３のスペーサーＳは、間隔保持部３１の左右両方に、下向きに開口する逆Ｕ字形とした挟持部を形成してあるもの、即ち、間隔保持部３１の左右両方が、縦方向に延びて管体Ｐの凹部３の側面に接当する接当部３３の上端から横外側に延びた後その先端部が下向きに垂下する形状とされていて、管体Ｐの凹部３を挟み込むようにした挟持部を備えたものとしてある。図２４のスペーサーＳは、左右の接当部３３を、管体Ｐの凹部３の側面に接当する接当部３３の上端から横外側に向かって延びた円弧状部分が連接されていて、この円弧状部分を管体Ｐの凹部３の上面に載置させる構造としたものであり、また、図２５のスペーサーＳは、接当部３３の上端から横外側に延びた横棒部分を備えていて、この横棒部分を、管体Ｐの凹部３の上方に接当載置させる構造としたものである。
【００３２】
以上本発明の代表的な実施例について説明したが、本発明は必ずしもこれらの実施例に説明した通りの手段のみに限定されるものではなく、例えば、何れの実施例または変形例に示したスペーサーＳにあっても、管体Ｐにおける凹部３にのみ接当させるものに限らず、管体Ｐの凸部２に接当させて管体間の空間を形成するように変えたり、また、第２実施例とその変形例として図９〜１４に示したところの、管体挟持用のＵ字形凹部２５を形成させてあるスペーサーＳを、先に配管した積層配管列に対してＵ字形凹部２５を挟み込ませるようにして上方から差し込ませて管列を形成するように使用すること、また、この上方から差し込んで使用する場合や第１実施例に使用した図３のスペーサーにあっては、管列に対する所要量の覆土後に、これらのスペーサーを引き抜いて再使用に回す等、適宜の変更を加えて実施することができるものであり、これら各実施例や変形例に示したスペーサーは、再生原料を用いて製造することができ、また、その製造手段は、プレス成形であってもインジェクション成形であってもよく、周知の任意の手段で形成することができるものであって、本発明にいう前記の構成要件を備え、かつ、本発明にいう目的を達成し、以下にいう効果を有する範囲内において適宜改変して実施することができるものである。
【００３３】
【発明の効果】
本発明にいう方法は、以上の説明から既に明らかなように、請求項１に記載の方法も請求項２に記載の方法もともに、管壁が軸方向に凹凸状に形成され、凸部の断面形状が方形状で凹部の断面形状が円形状に形成されている管体を対象として、この管体を地面を掘削した溝内に複数列に、または複数列・複数段に積み重ねて配管させるものであって、この配管時に、断面方形状とした凸部の側面どうしが直接接当し合うことなく、所定間隔離間状態に配管させることができるものであって、この配管作業を、従来の配管作業と殆ど変わることなく、積層配管にあってはより一層効率よく、極めて簡単かつ容易迅速に配管することができるものでありながら、管列間に形成する間隔空間幅を必要幅に任意に設定することができるので、この間隔空間内に、土砂や礫、掘削土等を容易に投入できため、掘削溝の埋め戻し覆土作業時に、同時に間隔空間内をも覆土で充填させることができ、管体の埋設作業を効率よく大幅に迅速化でき、しかも、管体の地中への埋設作業後に地盤沈下現象が生じることのない状態に埋設することができるという顕著な効果を有する。
【００３４】
更に、このような顕著な効果を有する地中への管体の埋設作業を、管体に特段の加工や変更を加えることなく、現状の管体構造のままで達成することができるという効果をも有しているものである。
【図面の簡単な説明】
【図１】第１実施例の配管状態を示す縦断面図。
【図２】同管体の配管状態を示す斜視図。
【図３】同実施例に使用のスペーサーの正面図。
【図４】第１実施例の変形例の配管状態を示す縦断面図。
【図５】変形例の配管状態を示す縦断面図。
【図６】同変形例に使用のスペーサーの正面図。
【図７】他の変形例の配管状態を示す縦断面図。
【図８】同変形例に使用のスペーサーの正面図。
【図９】第２実施例の配管状態を示す縦断面図。
【図１０】同実施例に使用のスペーサーの正面図。
【図１１】変形例の配管状態を示す縦断面図。
【図１２】同変形例に使用のスペーサーの正面図。
【図１３】他の変形例の配管状態を示す縦断面図。
【図１４】同変形例に使用のスペーサーの正面図。
【図１５】第３実施例の配管状態を示す縦断面図。
【図１６】同実施例に使用のスペーサーの正面図。
【図１７】変形例の配管状態を示す縦断面図。
【図１８】同変形例に使用のスペーサーの正面図。
【図１９】他の変形例のスペーサーの正面図。
【図２０】別構造のスペーサーの正面図。
【図２１】同変形例のスペーサーの正面図。
【図２２】他の変形例のスペーサーの正面図。
【図２３】更に別構造のスペーサーの正面図。
【図２４】同変形例のスペーサーの正面図。
【図２５】他の変形例のスペーサーの正面図。
【符号の説明】
１　管壁
２　凸部
３　凹部
２５　切り込み凹部
３１　間隔保持部
３２　弾性嵌合部
Ｄ　間隔空間
Ｇ　掘削溝
Ｐ　管体
Ｓ　スペーサー[0001]
TECHNICAL FIELD OF THE INVENTION
The present invention mainly arranges a required number of synthetic resin pipes, such as three rows and four rows, in a trench excavated on the ground, for protecting the optical fiber cable, the power line, the telephone line and the like by inserting and housing the inside. The present invention relates to a method of burying an underground pipe to be used as a perforated pipe by laying a pipe, or laying a plurality of rows of these rows in a two-stage, three-stage, four-stage or the like in a plurality of stacked shapes.
[0002]
Thus, in the tubular body referred to in the method of the present invention, the tubular wall is formed in an uneven shape in the axial direction, the cross-sectional shape of the convex portion is formed in a square shape, and the cross-sectional shape of the concave portion is formed in a circular shape. It is intended for a synthetic resin tube having a shape as described above.
[0003]
[Prior art]
Conventionally, a general spiral spiral pipe made of synthetic resin, in which the pipe wall has a spiral uneven shape and the cross-sectional shape of both the convex part and the concave part is circular, is buried in the ground to protect electric wires and water pipes. It is widely known to use. In addition, a plurality of such circular helical tubes are piped in parallel, and in many cases, they are piped in parallel in one row in a horizontal row, but these pipes are connected with a metal fitting with a relatively short span in the length direction. Also known is a means for forming a multi-layered, multi-tiered perforated conduit while maintaining a predetermined space in the vertical direction by converging the pipes.
[0004]
On the other hand, a synthetic resin tube (hereinafter, referred to as a tubular shape) in which the shape of the tube wall is an annular uneven shape, the cross-sectional shape of the convex portion is a square shape, and the cross-sectional shape of the concave portion is a circular shape, which is the object of the present invention. This is referred to as a specially shaped uneven tube), which has been filed by the present applicant and has already been known (see JP-A-8-219333).
[0005]
[Problems to be solved by the invention]
Thus, in the case of the above-mentioned circular spiral pipe, it is easy to rotate in the circumferential direction at the time of piping, and the position stability is poor. Sediment enters between the bodies, the straightness is disturbed and it is easy to meander.When inserting a cable etc. into the inside, if the pipe is meandering, the wiring resistance will increase significantly, reducing the difficulty of cable insertion work. There is a problem that it is easy to invite. Further, there is another problem that it is difficult to form stacked pipes in a natural state, and as described above, it is difficult to form stacked pipes unless the pipes are connected in a short span using a convergence connection fitting.
[0006]
The present invention focuses on the problems of such a conventional general circular spiral tube, and excludes the use of the general circular spiral tube for the purpose of solving the problems of the conventional tube. Then, only the above-mentioned irregularly shaped tube P is used as a target, and by utilizing the vertical and horizontal flat walls of the rectangular convex wall 2 of the irregularly shaped tube P, the tubes are parallel to each other in the horizontal and vertical directions. The advantage of being able to easily and stably pipe in a parallel position and a stacking position is to use such a pipe body in a parallel parallel pipe in the ground, or a multi-row / multi-stage parallel stacked pipe. It is intended to form a conduit.
[0007]
However, in the case of this specially shaped uneven pipe P, if a plurality of rows or a plurality of rows and a plurality of steps are closely contacted in the excavation groove to form a single block body, after the piping, the adjacent circular wall portion (the concave portion) is formed. ) After filling a compact such as sand or earth and sand into a small space formed between the three and the three, the excavation trench is backfilled and covered with soil. However, the work of sufficiently compressing and filling the small space with a filler such as sand or earth and sand requires time and labor.
[0008]
Therefore, the present inventor has changed the idea from such a gap filling method, and while making the most of the advantages provided by the specially-shaped uneven pipe P, and making any changes to the specially-shaped uneven pipe P. It is an object of the present invention to provide an underground burying method in which burying and piping work under the ground can be performed extremely easily and quickly while using the apparatus as it is without adding any processing.
[0009]
[Means for Solving the Problems]
One of the methods of embedding an underground pipe body according to the present invention taken to achieve this object is as follows: a pipe wall 1 is formed in an irregular shape in an axial direction, and a sectional shape of a convex part 2 is rectangular. Is a method of pipe-connecting a plurality of rows of pipes P in which the cross section of the concave portion 3 is formed in a circular shape in a groove G formed by excavating the ground. A spacer S is arranged between the pipe rows of the pipes P, and a pipe is held while maintaining a predetermined space D, and then the whole of the excavation groove G including the space D is backfilled and covered with soil. Means.
[0010]
Another method is as follows: a pipe body P in which the tube wall 1 is formed in an uneven shape in the axial direction, the cross-sectional shape of the convex portion 2 is rectangular, and the cross-sectional shape of the concave portion 3 is circular, A plurality of rows and a plurality of stages are piled up in a groove G in which the pipes are excavated, and a parallel pipe is stacked. At the time of the piping, a spacer S is provided between the pipe rows of the pipes P at intervals of an appropriate length in the pipe length direction. It is a means to arrange the pipes while holding a predetermined space D, and then backfill and cover the entire excavation groove G including the inside of the space D.
[0011]
BEST MODE FOR CARRYING OUT THE INVENTION
In carrying out these methods, pile members k, k... For preventing the posture of the pipes P... A work step of driving and standing up at intervals may be included. The pile members k, k,... May be set up before or after the stacking piping. However, when a spacer S having a U-shaped cut-out recess for sandwiching a pipe P to be described later is used for the outer tube row. Or, in the case of a stacked pipe of about two vertically stacked layers, it is not always necessary means.
[0012]
Further, the spacer S used in the piping method according to the present invention has a flat plate shape (shown in FIGS. 1 to 8) interposed between pipe rows as shown in the first embodiment and its modifications. 9 and 14 having a U-shaped concave portion 25 for holding the tube P, as shown in the second embodiment and its modifications.
[0013]
Furthermore, a spacer S for forming a space D between the pipes P of adjacent pipe rows, which is shown in the third embodiment and its modified example, is provided on both sides of the space holding portion 31 in the left-right direction. A C-shaped elastic fitting portion 32 (FIGS. 15 to 19), or one of the C-shaped elastic fitting portions 32, and the other a contact portion 33 or a holding portion with the tube. 20 to 22, and further, the both sides in the left-right direction of the space holding portion 31 as the contact portion 33 or the holding portion to the pipe (FIGS. 23 to 25). be able to. In this way, it is possible to use a spacer having a structure in which a predetermined space D is formed between each tube row.
[0014]
Since the pipe body P according to the present invention is used by being buried under the ground, its forming material is preferably a non-chlorine-based resin such as a polyolefin-based resin such as polyethylene or polypropylene. A tube formed of a synthetic resin material having high water resistance and little deterioration over time is suitable. When a pipe is required to have strength and flame retardancy, a polyvinyl chloride resin may be used.
[0015]
【Example】
Next, embodiments of the present invention will be described with reference to the accompanying drawings. 1 to 4 are views for explaining a first embodiment of the present invention. FIG. 1 is a longitudinal sectional view showing a piping state in which pipes are stacked in a plurality of rows and a plurality of stages, FIG. 2 is a perspective view showing a part of the piping state, and FIG. 3 shows a spacer shown in this embodiment. FIG. 4 is a longitudinal sectional view showing a state after the piping work.
[0016]
As shown in FIG. 2, the tubular body P to which the present invention is applied, including the first embodiment, is configured such that the shape of the tube wall 1 is an annular uneven waveform in the tube axis direction. The cross-sectional shape of the portion 2 is substantially square with rounded corners, and the cross-sectional shape of the concave portion 3 connecting between the convex portions 2 in the tube axis direction is a perfect circular shape. This is a tubular body in which the concave portions 3 are formed alternately and continuously.
[0017]
A description will be given of means for burying the pipe body P having such a structure in the ground to form a perforated pipe. In each of the embodiments described below, as shown in FIGS. 1 and 2, three pipes P are arranged horizontally and three rows are stacked vertically, and a total of nine pipes P are piped. This is described as an embodiment.
[0018]
First, the ground 10 on which a pipeline is to be formed is excavated to a required width and a required depth to form a groove G having a width and a depth required for a pipe. If necessary, gravel, sand, or the like 11 is spread over the bottom surface, and the groove bottom is formed substantially flat. Thereafter, a plurality of rows and a plurality of stages are formed on the groove bottom. In this embodiment, first, three pipes P are piped in a parallel state, and a flat plate is formed between the pipes as shown in FIG. The tip of a spacer S formed in the shape of a sheet pile and having a thickness approximately equal to or slightly thinner than the width of the concave portion 3 of the pipe body P in the pipe axis direction is driven into the ground to stand up. The piles k, k are erected to form the first row of tubes. Then, on each of these pipes P, another two pipes P are stacked, two by two, or one by one, and further one by one. Are piped as shown in FIG. The order of the pipes does not have to be exactly as described above. For example, the pipes P are stacked in three rows and three rows in advance, and the spacers S are inserted between the rows to arrange the rows, or three rows are arranged in one row. The pipes can be piled up in a pile or plumbed in the easiest way according to the work procedure.
[0019]
After piping in this manner, appropriate earth and sand, gravel, excavated soil and the like are put into the gap space D formed between the pipe rows and buried, or embedded, while the entire groove G is backfilled with excavated soil. As shown in FIG. 4, the entire pipe is covered with soil.
[0020]
FIGS. 5 and 6, FIGS. 7 and 8 each show a modification of the spacer S shown in the first embodiment. The modification shown in FIGS. The structure is such that a recess 21 is formed on both sides in the width direction in contact with the recess 3 of the tubular body P, and a vertically long through hole 22 is formed in an intermediate portion in the width direction to reduce the amount of material and reduce the weight. It is intended to be made. The piping method shown in FIG. 5 conforms to the first embodiment.
[0021]
In the modification shown in FIGS. 7 and 8, the structure of the spacer S is formed such that the lower end portion is integrally provided with a protruding portion 24 protruding in the lateral width direction. The concave portion 3 is formed in a receiving portion 23 on which the concave portion 3 is placed, and the first-stage pipe P is piped on the receiving portion 23 so that the piping position can be determined. In this modification, the recess 21 is formed above the receiving portion 23, and the through hole 22 is formed in the middle portion in the width direction.
[0022]
9 to 14 show a second embodiment in which the spacer S is provided with a concave portion 25 cut into a U-shape for holding the pipe P, and a modification thereof. 9 and 10 show a second embodiment, in which the spacer S has a rectangular plate shape and has a width corresponding to the width of the concave portion 3 of the pipe P at a position deviated to one side in the width direction. Is formed in a U-shape, and the width of the plate portion left wide is set to the interval width formed between the pipes P. As shown in FIG. 9, the U-shaped concave portion 25 is erected on the bottom of the excavation groove G in an upwardly open shape, and the spacer S is stacked so that the pipe P is dropped into the U-shaped concave portion 25. Assuming that the spacer S is the one on the left side in FIG. 9, the wide plate portion is disposed on the right side, and other spacers S are disposed symmetrically on the right side of the space for the piping in the middle row. The pipe P may be piped into the space for the intermediate pipe and the U-shaped recess 25 of the right spacer S. In this modification, the left and right plate portions of the U-shaped concave portion 25 are set to the interval width formed between the pipes P, P, and the intermediate rows of the pipes P are placed in the U-shaped concave portion 25. Piping may be used to form a left pipe row and a right pipe row outside the left and right plates.
[0023]
In the modification shown in FIG. 11 and FIG. 12, the structure of the spacer S is a plate narrower than the plate shown in the second embodiment, and the concave portion 25 cut into a U-shape in the middle portion in the width direction. And the remaining left and right plate widths are set to be substantially the same width, which are appropriately arranged at an arbitrary horizontal interval, and a pipe is inserted into each U-shaped recess 25 as shown in FIG. The pipe is configured to drop the body P.
[0024]
The modification shown in FIGS. 13 and 14 has a structure in which the structure of the spacer S is a plate wider than the plate shown in the second embodiment, and has a required width formed between pipe rows at an intermediate portion in the width direction. The concave portions 25, 25 cut into a U-shape are formed on the left and right sides of the plate portion, and a narrow plate-shaped portion is left outside thereof. In this way, as shown in FIG. 13, one U-shaped recess 25 of one spacer S and the U-shaped recess 25 on the adjacent side of the other spacer S are arranged so as to overlap in a line, and The pipe is arranged so that the pipe P is dropped into the U-shaped recess 25.
[0025]
FIGS. 15 to 25 relate to a spacer S that forms a space D between the pipes P of adjacent pipe rows. Among these, FIGS. 15 to 19 show the third embodiment and its modification. The spacer S is a C-shaped elastic fitting part 32, 32 formed on both sides of a space holding part 31 located at the middle in the left-right direction. (FIGS. 15 to 19), and only one of them is fitted to the tube P as a C-shaped elastic fitting portion 32, and the other is a contact portion 33 or a pinch to the tube. 20 to 22, and further, a group of ones in which the both sides of the space holding part 31 are abutting parts 33 or holding parts to the pipe (FIGS. 23 to 25). Can be divided into
[0026]
FIGS. 15 and 16 show a third embodiment in which the spacer S has a substantially spectacle shape and a lateral direction corresponding to the width of the space D formed between the adjacent pipes P. The structure is such that elastic fitting portions 32, 32 formed in a C-shape with downward openings are integrally formed on both sides of the interval holding portion 31 set to the length. At the time of piping, the spacer S is pressed from above into the concave portions 3 of the adjacent pipes P, P, and the elastic fitting portions 32 are temporarily opened to open the concave portions 3. 3 is fitted.
[0027]
FIGS. 17 and 18 show a modified example of the spacer S of the third embodiment. The structure of the spacer S is such that elastic fitting portions 32, 32 formed on both sides of the space holding portion 31 are provided. It is formed in a C-shape having an opening obliquely outward and downward, and otherwise conforms to the spacer S of the third embodiment. The spacer S shown in FIG. 19 has a structure in which the openings of the C-shaped elastic fitting portions 32, 32 are opened laterally outward.
[0028]
The spacer S shown in FIGS. 20 to 22 has the C-shaped elastic fitting part 32 formed on only one of the space holding parts 31 and the other part serving as the contact part 33 or the holding part with the pipe. A structure in which the elastic fitting portion 32 is fitted to the concave portion 3 of the tube P and the other contact portion 33 or the holding portion is applied to or sandwiched by another tube. It is.
[0029]
That is, the spacer S in FIG. 20 has a C-shaped elastic fitting portion 32 opened downward, and the other contact portion 33 has a portion connected in a downward U-shape. 3 is a holding portion structure in which the holding member 3 is held. The spacer S in FIG. 21 has the opening of the C-shaped elastic fitting portion 32 opened obliquely outward and downward, and the other contact portion 33 is fitted above the concave portion 3 of the pipe P. The spacer S in FIG. 22 has a structure in which the opening of the C-shaped elastic fitting part 32 is opened laterally outward, and the other contact part 33 has a structure in which a horizontal bar-shaped portion that contacts the upper part of the concave portion 3 of the pipe P is connected.
[0030]
The spacer S shown in FIGS. 23 to 25 has a structure in which contact portions 33, 33 or holding portions to the tube are formed symmetrically on both the left and right sides of the spacing portion 31. Thus, the elastic fitting portion 32 is placed against the concave portion 3 of the tube P and is placed or sandwiched.
[0031]
That is, the spacer S in FIG. 23 has a holding portion formed in an inverted U-shape that opens downward, on both the left and right sides of the space holding portion 31, that is, both the left and right sides of the space holding portion 31 are vertically aligned. The contact portion 33 extends laterally outward from the upper end of the contact portion 33 that contacts the side surface of the concave portion 3 of the tubular body P, and then has a tip portion that is drooped downward so as to sandwich the concave portion 3 of the tubular body P. It is provided with a holding portion formed as described above. In the spacer S of FIG. 24, the left and right contact portions 33 are connected to an arc-shaped portion extending laterally outward from the upper end of the contact portion 33 contacting the side surface of the concave portion 3 of the pipe P, This arc-shaped portion is configured to be placed on the upper surface of the concave portion 3 of the tubular body P. The spacer S in FIG. 25 includes a horizontal bar portion extending laterally outward from the upper end of the contact portion 33. The horizontal bar portion is configured to be abutted and mounted above the concave portion 3 of the tubular body P.
[0032]
Although the representative embodiments of the present invention have been described above, the present invention is not necessarily limited to only the means described in these embodiments. For example, the spacer shown in any of the embodiments or the modifications may be used. S is not limited to contacting only the concave portion 3 of the tubular body P, but may be changed so as to contact the convex portion 2 of the tubular body P to form a space between the tubular bodies. The spacer S having the U-shaped recess 25 for holding the tube body formed therein as shown in FIGS. Is used to form a tube row by being inserted from above so as to be sandwiched. Also, in the case of being used by being inserted from above or in the spacer of FIG. After covering the required amount of soil for the row, The spacers shown in each of the examples and modifications can be manufactured using recycled materials, with appropriate modifications such as pulling out these spacers and reusing them for reuse. It can be, and its production means may be press molding or injection molding, and can be formed by any known means, and has the above-mentioned constitutional requirements according to the present invention, In addition, the present invention achieves the object of the present invention and can be appropriately modified and implemented within a range having the following effects.
[0033]
【The invention's effect】
In the method according to the present invention, as is clear from the above description, in both the method according to claim 1 and the method according to claim 2, the tube wall is formed to have an uneven shape in the axial direction, and For a pipe whose cross section is square and the cross section of the recess is formed in a circular shape, the pipes are piped in a plurality of rows or in a plurality of rows and a plurality of stages in a trench excavated on the ground. In this piping, the side surfaces of the convex portion having a rectangular cross section can be piped in a predetermined separation state without directly abutting each other. With almost no difference from the piping work, in the case of laminated piping, it is possible to pipe much more efficiently, very simply and easily and quickly, but arbitrarily set the interval space width formed between pipe rows to the required width. This interval can be set Earth and sand, gravel, excavated soil, etc. can be easily injected into the space, so that when filling the excavation trench and backfilling the soil, the space inside can be filled with the soil at the same time. And the pipe can be buried in a state where the land subsidence phenomenon does not occur after the work of burying the pipe in the ground.
[0034]
Furthermore, there is an effect that the embedding work of the pipe body under the ground having such a remarkable effect can be achieved with the current pipe structure without any special processing or modification of the pipe body. It also has.
[Brief description of the drawings]
FIG. 1 is a longitudinal sectional view showing a piping state of a first embodiment.
FIG. 2 is a perspective view showing a pipe state of the pipe body.
FIG. 3 is a front view of a spacer used in the embodiment.
FIG. 4 is a longitudinal sectional view showing a piping state of a modification of the first embodiment.
FIG. 5 is a longitudinal sectional view showing a piping state of a modified example.
FIG. 6 is a front view of a spacer used in the modification.
FIG. 7 is a longitudinal sectional view showing a piping state of another modification.
FIG. 8 is a front view of a spacer used in the modification.
FIG. 9 is a longitudinal sectional view showing a piping state of the second embodiment.
FIG. 10 is a front view of a spacer used in the embodiment.
FIG. 11 is a longitudinal sectional view showing a piping state of a modified example.
FIG. 12 is a front view of a spacer used in the modification.
FIG. 13 is a longitudinal sectional view showing a piping state of another modification.
FIG. 14 is a front view of a spacer used in the modification.
FIG. 15 is a longitudinal sectional view showing a piping state of the third embodiment.
FIG. 16 is a front view of a spacer used in the embodiment.
FIG. 17 is a longitudinal sectional view showing a piping state of a modified example.
FIG. 18 is a front view of a spacer used in the modification.
FIG. 19 is a front view of a spacer according to another modification.
FIG. 20 is a front view of a spacer having another structure.
FIG. 21 is a front view of a spacer according to the modification.
FIG. 22 is a front view of a spacer according to another modification.
FIG. 23 is a front view of a spacer having still another structure.
FIG. 24 is a front view of a spacer according to the modification.
FIG. 25 is a front view of a spacer according to another modification.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Pipe wall 2 Convex part 3 Concave part 25 Notch concave part 31 Spacing holding part 32 Elastic fitting part D Spacing space G Excavation groove P Tube S Spacer

Claims

The pipe (P) in which the pipe wall (1) is formed in an uneven shape in the axial direction, the cross section of the projection (2) is square and the cross section of the recess (3) is circular, A plurality of parallel pipes in a groove (G) in which a pipe is excavated, and a spacer (S) is provided between the pipe rows of the pipes (P) and (P) at an appropriate length interval in the pipe length direction during the piping. ) And laying pipes while maintaining a predetermined space (D), and then burying an underground buried pipe that backfills and covers the entire excavation trench (G) including the inside of the space (D). Method.

The pipe (P) in which the pipe wall (1) is formed in an uneven shape in the axial direction, the cross section of the projection (2) is square and the cross section of the recess (3) is circular, A plurality of rows and a plurality of steps are stacked in a groove (G) in which pipes are excavated, and parallel piping is performed. At this time, the pipe rows (P) and (P) are arranged at appropriate intervals in the pipe length direction. A spacer (S) is interposed between the pipes, and the pipes are stacked and piped while maintaining a predetermined space (D). Thereafter, the whole of the excavation groove (G) including the space inside the space (D) is backfilled. How to bury underground pipes to cover soil.

The method according to claim 1 or 2, wherein the spacer (S) is a flat plate.

The method for burying an underground pipe according to claim 1 or 2, wherein the spacer (S) is provided with a U-shaped notch (25) for holding the pipe (P).

The method for burying an underground pipe according to claim 1 or 2, wherein the spacer (S) is provided with a C-shaped elastic fitting part (32) on the left and right of the spacing part (31).

3. The method of burying an underground pipe according to claim 2, further comprising the step of: erecting pile members (k) at appropriate length intervals in the pipe length direction outside the stacked pipe row at the time of piping.