JP4243773B2

JP4243773B2 - Propulsion fume pipe high water pressure joint structure and propulsion fume pipe manufacturing method

Info

Publication number: JP4243773B2
Application number: JP2000113961A
Authority: JP
Inventors: 勝則中村
Original assignee: 藤村ヒューム管株式会社
Priority date: 2000-04-14
Filing date: 2000-04-14
Publication date: 2009-03-25
Anticipated expiration: 2020-04-14
Also published as: JP2001295580A

Description

【０００１】
【発明の属する技術分野】
本発明は、地中を推進する推進用ヒューム管の高水圧継手構造及び推進用ヒューム管の製造方法に関する。
【０００２】
【従来の技術】
従来、推進管ａは地下水圧０．２ＭＰａ（メガパスカル）程度の条件下で施工されれることが多く、該推進管ａの継手部の止水は、継手部の接合部に設けた溝ｃとカラーｂ、ｅ間に１本のゴム輪ｄ（図11参照）ないしは２本のゴム輪ｆ（図12参照）を配置し、２本のゴム輪ｆの場合は、推進管ａの接合部に止水剤注入のための注入孔ｇを設けた構造としている。
【０００３】
【発明が解決しようとする課題】
(1) しかし、都市部では、地下空間の開発が行われていて、新たに地下に設ける下水管路や通信、電力管路は地下約５０ｍ程度の深さに敷設する必要がある。
また、最近の土木技術の向上により、５０ｍもの地下つまり外水圧０．５ＭＰａ程度の高水圧までの施工が要求されるようになった。
そして、このような深さの地下にヒューム管を敷設する場合に管継手部の水密性を確保すること、管本体の水密性を確保することが重要な課題となっている。
(2) 図１１〜12に示した、従来の、継手部の接合部に１本のゴム輪ｄないしは２本のゴム輪ｆを配置する構造の継手構造では、水平状態での接合時には高水密の継手性能であっても、時には継手部の水蜜性が低下して漏水することがある。この原因としては何らかの要因によって管周方向の一部にゴム輪の圧縮率が低下する箇所が発生することにある。例えば、管が偏圧を受ける場合、曲線施工によって管が継手部で曲がる場合やずれる場合等が上げられる。
推進管の継手部の水蜜性は、推進管に装着されたゴム輪をカラーで圧縮し、その反発力を利用して止水性能を確保している。しかして、断面の大きなゴム輪を使用してゴム輪を強い力で圧縮すれば、強い反発力作用によって多少の管のずれもゴム輪の圧縮率がわずかに変化するだけのため高い水蜜性を得られる。しかし、管同士を接合する際にも又大きな力で接合しなければならなくなるため、接合の際にゴム輪のめくれや管同士が完全に接触しない状態となり、継手部の水蜜性を低下させてしまうことがある。また、ゴム輪が強い反発力でカラー部を押しているため、継手部の鋼性が大きくなり、曲線施工等のように管を曲げて敷設しなければならない場合に、設計したように管と管とが曲がらず、継手部の可撓性が損なわれるという問題点がある。
一方、容易に接合可能に断面の小さなゴム輪を使用してゴム輪の反発力を小さくすると、継手部の鋼性が小さくなるため、管と管とが曲がりやすくなり、継手部の可撓性は良好になるという利点はあるものの、ゴム輪の反発力が低下する。その結果、管の蛇行等によって管に偏圧が作用し、継手部が変位した場合には、ゴム輪の適正な圧縮率が低下し、漏水を引き起こすという問題点がある。従って、管継手部で高い水蜜性得ようとする場合、容易に接合ができ、可撓性に富む性能を併せ持つ継手構造とすることが大きな課題となる。
(3) 通常コンクリート製の推進管は推進時において、その外壁面がレキ等によってコンクリート表面に損傷を受けるため、使用できる場所は外水圧０．２ＭＰａ程度までとなっている。そして、これを超えた外水圧で使用をする場合は、外周面を鋼管で被覆して損傷を低減する等の対策を取っている。
一方推進管には、掘削した土と管との間の空隙部に管内からグラウトを注入するための注入孔ｈを設けているが、外周を鉄板で被覆した場合に、鉄板とコンクリート部位との間に剥離が発生する。その結果、剥離した隙間から水が浸入し、鉄板とコンクリートの境界を経由して水が浸入し、ついには継手部の漏水を引き落とすという問題点がある。
また、図13のように、推進用管の推進時には、土と外壁面との摩擦によって外周を被覆した鉄板ｊとコンクリートｋとの間に剥離Ｍが発生し、剥離Ｍした隙間から地下水が侵入し、継手部Ｌ箇所の漏水を発生させるという問題点がある。
更に、同様な理由からグラウト充填の注入孔ｈからも漏水Ｎするという問題点がある。
(4) 従来の推進用ヒューム管の製造方法では、外周に配置した鋼製の筒体に注入孔を取り付ける埋める孔を開け、これを型枠に配置した後にコンクリートを打設して形成している。しかし、開口部周辺は鋼製の筒体とコンクリートとは一体に成形していないので、成形後に保管置き場での昼夜の繰り返される温度差等や推進中の偏圧等によって鉄板とコンクリートとが剥離するという問題点がある。
本発明は上述の問題点に鑑みて発明されたもので、継手部における良好な接合性と可撓性を有し、かつ高い水蜜性を確保可能で、高水圧に耐え得る推進用ヒューム管の構造及び鉄筋を切断しないで滑剤の注入孔を形成する推進用ヒューム管の製造方法の提供を目的としている。
【０００４】
【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の請求項第1項に記載の推進用ヒューム管の構造は、
一方側管端部には縮径した接合部２１を有し、該接合部２１及びその他の管外周面全体を鉄板２で被覆した推進用ヒューム管1の該接合部21に、滑剤又は止水剤を内方から注入可能に注入孔５を設け、該接合部２１の管端側にはゴム輪止め具４１を設けると共に、中間部には各ゴム輪の幅でリング４を設け、管端側には、カラー部の挿入にガイドとなる接合用ゴム輪６１を配置する共に、管端より離れて奥側には、継手用ゴム輪６を配置し、この接合用ゴム輪６１と継手用ゴム輪６間に水膨張接合用ゴム輪６２を配設することを特徴としている。
請求項２に記載の発明は、請求項１の注入孔５は、継手用ゴム輪６と水膨張接合用ゴム輪６２との間位置に設けたことを特徴としている。
請求項３に記載の発明は、請求項１の注入孔５は、管端に近接させ、接合用ゴム輪６１と水膨張接合用ゴム輪６２との間位置に設けたことを特徴としている。
請求項４に記載の発明は、請求項１の管内の注入孔５から空間部Ｂに、水と反応して膨張する流動性充填物を充填することを特徴としている。
請求項５に記載の発明は、請求項１の発明の曲線施工時に、管内の注入孔５から空間部Ｂに、ゴム輪が曲がりの際の摩擦を少なくし、滑り易くする潤滑剤を注入することを特徴としている。
請求項６に記載の推進用ヒューム管の構造の発明は、一方側管端部には縮径した接合部２１を有するコンクリート製推進用ヒューム管1ａの他方端部には、端部内面にアンカー１６を溶着し、該アンカー１６より管端側に水膨張リングを配置し、前記接合部２１外周は鉄板で被覆し、該接合部21に、滑剤又は止水剤を内方から注入可能に注入孔５を設け、該接合部２１の管端側にはゴム輪止め具４１を設けると共に、中間部には各ゴム輪の幅でリング４を設け、管端側には、カラー部の挿入にガイドとなる接合用ゴム輪６１を配置する共に、管端より離れて奥側には、継手用ゴム輪６を配置し、この接合用ゴム輪６１と継手用ゴム輪６間に水膨張接合用ゴム輪６２を配設することを特徴としている。
請求項７に記載の発明である推進用ヒューム管の製造方法は、一方側管端部には縮径した接合部２１を有し、該接合部２１及びその他の管外周面全体を鉄板２で被覆した推進用ヒューム管１における鉄板２の注入孔１２位置に、螺旋鉄筋と縦筋を避けて孔12ａを穿設し、該孔12ａの内側面にネジを切った円筒体２４を溶着し、該円筒体２４には、入り口にキャップを嵌めた筒体１７を螺着した後、遠心成形することを特徴としている。
【０００５】
【発明の実施の形態】
本発明の実施形態を図１〜図５に基づき説明する。本発明の請求項第1項に記載の推進用ヒューム管の構造は、
一方側管端部には縮径した接合部２１を有し、該接合部２１及びその他の管外周面全体を鉄板２で被覆した推進用ヒューム管1の該接合部21に、滑剤又は止水剤を内方から注入可能に注入孔５を設け、該接合部２１の管端側にはゴム輪止め具４１を設けると共に、中間部には各ゴム輪の幅でリング４を設け、管端側には、カラー部の挿入にガイドとなる接合用ゴム輪６１を配置する共に、管端より離れて奥側には、継手用ゴム輪６を配置し、この接合用ゴム輪６１と継手用ゴム輪６間に水膨張接合用ゴム輪６２を配設している。
請求項２に記載の発明は、請求項１の注入孔５は、継手用ゴム輪６と水膨張接合用ゴム輪６２との間位置に設けてもよい。
請求項３に記載の発明は、請求項１の注入孔５は、管端に近接させ、接合用ゴム輪６１と水膨張接合用ゴム輪６２との間位置に設けてもよい。
請求項４に記載の発明は、請求項１の管内の注入孔５から空間部Ｂに、水と反応して膨張する流動性充填剤を充填してもよい。
請求項５に記載の発明は、請求項１の発明の曲線施工時に、管内の注入孔５から空間部Ｂに、ゴム輪が曲がりの際の摩擦を少なくし、滑り易くする潤滑剤を注入してもよい。
請求項６に記載の推進用ヒューム管の構造の発明は、一方側管端部には縮径した接合部２１を有するコンクリート製推進用ヒューム管1ａの他方端部には、端部内面にアンカー１６を溶着し、該アンカー１６より管端側に水膨張リングを配置し、前記接合部２１外周は鉄板で被覆し、該接合部21に、滑剤又は止水剤を内方から注入可能に注入孔５を設け、該接合部２１の管端側にはゴム輪止め具４１を設けると共に、中間部には各ゴム輪の幅でリング４を設け、管端側には、カラー部の挿入にガイドとなる接合用ゴム輪６１を配置する共に、管端より離れて奥側には、継手用ゴム輪６を配置し、この接合用ゴム輪６１と継手用ゴム輪６間に水膨張接合用ゴム輪６２を配設している。
上記の場合に、ゴム輪とカラーを用いた継手構造において、接合用ゴム輪６１、継手用ゴム輪６、水膨張性ゴム輪６２の3本の異なる役目、機能を持ったゴム輪を継手部に配置することによって、良好な接合性と可撓性、そして高い水蜜性を確保することができる。
高い水蜜性を得るためには、管の継手部で変位を受けた場合においても、ゴム輪は管周方向で出来る限り均等な圧縮率となる必要がある。そこで、接合用ゴム輪６１と継手用ゴム輪６の2本のゴム輪の間に、やや小さく、水によって体積が膨張する、いわゆる水膨張性ゴム輪６２を1本配置する。
この構造では、偏土圧等によって推進管の継手部に曲がりが発生した場合、水膨張性ゴム輪62は他の2本のゴム輪より断面がやや小さいため、変位当初は2本のゴム輪である接合用ゴム輪６１と継手用ゴム輪６が主となって変位を吸収するように働くが、次第に変位が進行してくると水膨張性ゴム輪６２にも徐々に変位による荷重が作用するため、この水膨張性ゴム輪６２にも管とカラーとの隙間Ｂを保持するため反発力が大きくなる。このように、変位当初は前記2本のゴム輪で偏圧を支承したものが、徐々に前記ゴム輪3本で変位に抵抗するため、継手部の可撓性を大きく損ねることなく、管周上で各ゴム輪６、６１、６２の圧縮率を均等に保持するので、高い水蜜性を得ることができる。
また、3本のゴム輪６、６１、６２に過大な荷重が作用してゴム輪６、６１、６２の圧縮率が低下し、管外部から継手部に水が浸入しても、2本の接合用ゴム輪６１、継手用ゴム輪６間に配置した水膨張性ゴム輪６２により、浸入してきた水と反応して該水膨張性ゴム輪６２が体積膨張するため高い水蜜性を達成できる。
この水膨張性ゴム輪６２は、他の2本の接合用ゴム輪６１、継手用ゴム輪６よりやや小さい断面形状となっていて、接合用ゴム輪６１、継手用ゴム輪６の2本のゴム輪に囲まれているため、通常の状態では管外の水、管内の水に接触することがないので、該水膨張性ゴム輪６２は膨張することがい。従って、継手部の可撓性が大きく損なわれることがない。
また、一般に接合時の抵抗力は使用されている最も大きいゴム輪でほほ決まる。この構造では、中間部に配置される水膨張性ゴム輪６２を先頭の接合用ゴム輪６１よりやや小さく形成してあるため、接合時の抵抗は、先頭の接合用ゴム輪６１がカラー２３に挿入される時の抵抗力より大きくなることはないため、良好な接合性を得られる。
さらに、接合部の中間部に配置される水膨張性ゴム輪６２は、他の2本のゴム輪である接合用ゴム輪６１、継手用ゴム輪６のいずれかに近接させて配置すると、短い接合部の長さでもゴム輪の機能を有効に発揮させることができる。すなわち、1本の水膨張性ゴム輪６２と隣接する2本の接合用ゴム輪６１、継手用ゴム輪６間に空間部Ｂを設け、該空間部Ｂに管内からこの注入孔５を利用し、漏水が発生した場合に水膨張性のゴム輪６２による止水性の補強に加えて、水と反応して堆積膨張するウレタン系材料の流動性充填材８を注入しする。この注入作業は、先頭のゴム輪と中間の水膨張性ゴム輪と最後端のゴム輪を近接して配置する場合は、先頭のゴム輪と中間の水膨張性ゴム輪間に形成される空間部に前記充填８を注入する。
また、曲線施工で等で管同士を設計して曲げる場合には、前記ゴム輪６、６１が滑り易く、かつ容易に曲設可能にするための潤滑剤を注入するのがよい。従って、ゴム輪６、６１は曲がりの際の摩擦による磨耗を受けることが回避できる。そして、上記継手構造の場合は、地下５０ｍ近辺に発生する水圧０．５ＭＰａ（メガパスカル）まで耐え得る。
図6〜図10に示したように、請求項７に記載の発明である推進用ヒューム管の製造方法は、一方側管端部には縮径した接合部２１を有し、該接合部２１及びその他の管外周面全体を鉄板２で被覆した推進用ヒューム管１における鉄板２の注入孔１２位置に、螺旋鉄筋と縦筋を避けて孔12ａを穿設し、該孔12ａの内側面にネジを切ったソケット２４を溶着し、該ソケット２４には、入り口にキャップを嵌めた筒体１７を螺着した後、遠心成形することを特徴としている。
鉄板２は開口する孔径とほぼ同径で、およそ３０ｍｍ程度のソケット２４を鉄板と一体に取り付け、これを型枠内に配置し、その後組み立てた鉄筋籠を型枠に入れ、用意された、所定の肉厚の長さのソケット２４を継ぎ足した後、コンクリートを打設して形成する。この結果、鉄板２とソケット２４は一体になるため、鉄板２と推進用ヒューム管のコンクリートに剥離が発生しないので、外水圧が高い場所での施工も問題ない。また、ソケット２４は分割されているため、鉄筋籠の鉄筋を切断して鉄板２の筒の中に入れることがなくなるので、注入孔１２の開口部が強度的に弱くなることはない。
【０００６】
【発明の効果】
本発明は以上の構成であるため、以下の効果を奏するものである。
(1)ゴム輪とカラーを用いた継手構造において、3本の異なる役目、機能を持ったゴム輪を継手部に配置するたとによって、良好な接合性と可撓性、そして高い水蜜性を確保することができる。
(2)本発明の構成の継手構造では、地下５０ｍ近辺に発生する水圧０．５ＭＰａ（メガパスカル）までの高水圧に耐えることができる。
(3)注入孔の注入管を鉄筋挿入後に取り付ける方法であるため、鉄筋を切断せずに型枠にセットできる。従って、鉄筋切断による生ずる強度ダウンがない。
【図面の簡単な説明】
【図１】本発明の外周面を鉄板で被覆した推進用ヒューム管の半断面図正面図である。
【図２】本発明の外周面を鉄板で被覆した推進用ヒューム管の右側面図である。
【図３】本発明の外周面を鉄板で被覆した推進用ヒューム管の継手部分の断面図である。
【図４】本発明の別実施例における継手部分の断面図である。
【図５】本発明の別実施例における継手部分の断面図である。
【図６】本発明の推進用ヒューム管の製造方法における成形前の説明図である。
【図７】本発明の推進用ヒューム管の製造方法における筒体取り付け状態の成形前の説明図である。
【図８】本発明の推進用ヒューム管の製造方法における筒体断面図である。
【図９】本発明の推進用ヒューム管の製造方法の要部断面図である。
【図１０】本発明の推進用ヒューム管の製造方法の内面側からの説明図である。
【図１１】従来の１個の止水用ゴム輪を用いた推進用ヒューム管の断面図である。。
【図１２】従来の２個の止水用ゴム輪を用いた推進用ヒューム管の断面図である。。
【図１３】従来の推進用ヒューム管における剥離、漏水状態の説明図である。。
【符号の説明】
１推進用ヒューム管
１１本体
１１ａ螺旋鉄筋
１１ｂ縦筋
１２注入孔
１３接合部
１４注入孔
１５切欠
１６アンカー
１６ａ鉄筋
１７筒体
１８ネジ
１９キャップ
２被覆鉄板
２１接合部
２２穴
２３カラー部
２４ソケット
２５溶接部
３クッション材
４リング
４１Ｌ形止め具
５注入孔
５１筒部
５２キャップ
６継手用ゴム輪
６１接合用ゴム輪
６2 水膨張接合用ゴム輪
７カラー
Ｗ内枠[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a high-pressure joint structure for a propulsion fume pipe propelled in the ground and a method for manufacturing the propulsion fume pipe.
[0002]
[Prior art]
Conventionally, the propelling pipe a is often constructed under the condition of a groundwater pressure of about 0.2 MPa (megapascal), and the water stop of the joint portion of the propelling pipe a is a groove c provided at the joint portion of the joint portion. One rubber ring d (see FIG. 11) or two rubber rings f (see FIG. 12) are arranged between the collars b and e, and in the case of two rubber rings f, at the joint of the propelling pipe a. A structure is provided with an injection hole g for injecting a water-stopping agent.
[0003]
[Problems to be solved by the invention]
(1) However, underground spaces are being developed in urban areas, and it is necessary to lay sewage pipes, communication lines, and power pipes newly installed underground at a depth of about 50m underground.
In addition, due to recent improvements in civil engineering technology, construction up to 50 m underground, that is, up to a high water pressure of about 0.5 MPa of external water pressure has been required.
And when laying a fume pipe in the underground of such a depth, securing the watertightness of a pipe joint part and securing the watertightness of a pipe body are important issues.
(2) In the conventional joint structure shown in FIGS. 11 to 12 in which one rubber ring d or two rubber rings f are arranged at the joint part of the joint part, high water-tightness is achieved when joining in a horizontal state. Even if it is the joint performance of this, sometimes the water leakage of a joint part falls and it may leak. This is due to the occurrence of a portion where the compression ratio of the rubber ring is reduced in a part of the pipe circumferential direction due to some factor. For example, when the pipe is subjected to partial pressure, the case where the pipe is bent or deviated at the joint portion due to curve construction is raised.
The water resistance of the joint part of the propulsion pipe is achieved by compressing the rubber ring attached to the propulsion pipe with a collar and using the repulsive force to ensure water stopping performance. However, if a rubber ring with a large cross section is used to compress the rubber ring with a strong force, a slight repulsive force will cause a slight displacement of the tube, and the compression rate of the rubber ring will change slightly, resulting in high honey characteristics. can get. However, since it is necessary to join the pipes with a large force when joining the pipes, the rubber rings are turned over and the pipes are not completely in contact with each other. May end up. Also, since the rubber ring pushes the collar part with a strong repulsive force, the steel part of the joint part becomes large, and when it is necessary to bend and lay the pipe as in curved construction, the pipe and pipe as designed. And there is a problem that the flexibility of the joint portion is impaired.
On the other hand, if you use a rubber ring with a small cross-section that can be easily joined and reduce the repulsive force of the rubber ring, the steel part of the joint part will be reduced, so the pipe will tend to bend and the flexibility of the joint part will be reduced. Although there is an advantage that becomes better, the repulsive force of the rubber ring is reduced. As a result, there is a problem in that when the pipe is biased due to meandering of the pipe and the joint portion is displaced, the appropriate compression ratio of the rubber ring is lowered and water leakage occurs. Therefore, when trying to obtain a high water honey property at the pipe joint portion, it becomes a big problem to have a joint structure that can be easily joined and has a performance that is rich in flexibility.
(3) When a concrete propulsion pipe is propelled, its outer wall surface is damaged by concrete and the like in the concrete surface, so the place where it can be used is up to an external water pressure of about 0.2 MPa. And when using it by the external water pressure exceeding this, measures, such as covering an outer peripheral surface with a steel pipe and reducing damage, are taken.
On the other hand, the propulsion pipe is provided with an injection hole h for injecting grout from inside the pipe in the space between the excavated soil and the pipe. Peeling occurs between them. As a result, there is a problem that water enters through the separated gap, enters through the boundary between the iron plate and the concrete, and finally pulls down the leakage of the joint.
In addition, as shown in FIG. 13, when the propulsion pipe is propelled, separation M occurs between the steel plate j and the concrete k covering the outer periphery due to friction between the soil and the outer wall surface, and groundwater enters through the gap where the separation M occurs. However, there is a problem of causing water leakage at the joint portion L.
Furthermore, for the same reason, there is a problem that water leaks N from the grout filling hole h.
(4) In the conventional method of manufacturing a fume pipe for propulsion, a hole for filling an injection hole is formed in a steel cylinder arranged on the outer periphery, and after placing this in a mold, it is formed by placing concrete. Yes. However, because the steel cylinder and concrete are not molded integrally around the opening, the steel plate and concrete peel off due to repeated temperature differences during the day and night in the storage space after molding and bias pressure during propulsion. There is a problem of doing.
The present invention has been invented in view of the above-mentioned problems, and has a good bonding property and flexibility in a joint portion, can ensure high water honey properties, and is a propulsion fume tube that can withstand high water pressure. An object of the present invention is to provide a method for manufacturing a propulsion fume tube that forms an injection hole for a lubricant without cutting the structure and the reinforcing bar.
[0004]
[Means for Solving the Problems]
In order to achieve the above object, the structure of the propulsion fume tube according to claim 1 of the present invention is:
One end of the pipe has a joint 21 with a reduced diameter, and the joint 21 of the propulsion fume pipe 1 in which the joint 21 and the other outer peripheral surface of the pipe are covered with the iron plate 2 is provided with a lubricant or water stop. An injection hole 5 is provided so that the agent can be injected from the inside, a rubber ring stopper 41 is provided on the tube end side of the joint portion 21, and a ring 4 is provided in the middle portion with the width of each rubber ring, On the side, a rubber band for joining 61 serving as a guide for inserting the collar portion is disposed, and on the back side away from the pipe end, a rubber ring for joint 6 is disposed. A rubber ring 62 for water expansion bonding is disposed between the rubber rings 6.
The invention according to claim 2 is characterized in that the injection hole 5 according to claim 1 is provided at a position between the rubber ring for joint 6 and the rubber ring for water expansion joining 62.
The invention described in claim 3 is characterized in that the injection hole 5 of claim 1 is provided close to the pipe end and provided at a position between the bonding rubber ring 61 and the water expansion bonding rubber ring 62.
The invention described in claim 4 is characterized in that a fluid filler that expands by reacting with water is filled into the space B from the injection hole 5 in the pipe of claim 1.
According to the fifth aspect of the present invention, at the time of curve construction according to the first aspect of the present invention, a lubricant that reduces friction when the rubber ring bends and injects a lubricant to the space B from the injection hole 5 in the pipe is injected. It is characterized by that.
According to the invention of the structure of the propulsion fume pipe according to claim 6, the other end of the concrete propulsion fume pipe 1a having the joint portion 21 having a reduced diameter at one end of the pipe is anchored to the inner surface of the end. 16 is welded, a water expansion ring is arranged on the pipe end side from the anchor 16, the outer periphery of the joint portion 21 is covered with an iron plate, and a lubricant or a water stop agent is injected into the joint portion 21 so as to be injected from the inside. A hole 5 is provided, a rubber ring stopper 41 is provided on the tube end side of the joint portion 21, and a ring 4 is provided in the middle portion with the width of each rubber ring, and a collar portion is inserted on the tube end side. A rubber ring for joining 61 serving as a guide is disposed, and a rubber ring for joint 6 is disposed on the back side away from the pipe end, and for water expansion joining between the rubber ring for joining 61 and the rubber ring for joint 6. A rubber ring 62 is provided.
The manufacturing method of the fume pipe | tube for a propulsion which is invention of Claim 7 has the junction part 21 diameter-reduced in the one side pipe | tube end part, and this joint part 21 and the other pipe | tube outer peripheral surface are the iron plate 2 whole. A hole 12a is drilled at the position of the injection hole 12 of the iron plate 2 in the coated propulsion fume tube 1 avoiding the spiral reinforcing bar and the vertical bar, and a cylindrical body 24 having a screw cut is welded to the inner surface of the hole 12a. The cylindrical body 24 is characterized in that a cylindrical body 17 fitted with a cap at the entrance is screwed and then centrifugally molded.
[0005]
DETAILED DESCRIPTION OF THE INVENTION
An embodiment of the present invention will be described with reference to FIGS. The structure of the propulsion fume tube according to claim 1 of the present invention is:
One end of the pipe has a joint 21 with a reduced diameter, and the joint 21 of the propulsion fume pipe 1 in which the joint 21 and the other outer peripheral surface of the pipe are covered with the iron plate 2 is provided with a lubricant or water stop. An injection hole 5 is provided so that the agent can be injected from the inside, a rubber ring stopper 41 is provided on the tube end side of the joint portion 21, and a ring 4 is provided in the middle portion with the width of each rubber ring, On the side, a rubber band for joining 61 serving as a guide for inserting the collar portion is disposed, and on the back side away from the pipe end, a rubber ring for joint 6 is disposed. A rubber ring 62 for water expansion joining is disposed between the rubber rings 6.
According to a second aspect of the present invention, the injection hole 5 of the first aspect may be provided between the joint rubber ring 6 and the water expansion bonding rubber ring 62.
According to a third aspect of the present invention, the injection hole 5 of the first aspect may be provided close to the pipe end and provided between the bonding rubber ring 61 and the water expansion bonding rubber ring 62.
According to a fourth aspect of the present invention, a fluid filler that expands by reacting with water may be filled into the space B from the injection hole 5 in the pipe of the first aspect.
According to the fifth aspect of the present invention, at the time of the curve construction of the first aspect of the invention, a lubricant that reduces friction when the rubber ring is bent and injects a lubricant to the space B from the injection hole 5 in the pipe is injected. May be.
According to the invention of the structure of the propulsion fume pipe according to claim 6, the other end of the concrete propulsion fume pipe 1a having the joint portion 21 having a reduced diameter at one end of the pipe is anchored to the inner surface of the end. 16 is welded, a water expansion ring is arranged on the pipe end side from the anchor 16, the outer periphery of the joint portion 21 is covered with an iron plate, and a lubricant or a water stop agent is injected into the joint portion 21 so as to be injected from the inside. A hole 5 is provided, a rubber ring stopper 41 is provided on the tube end side of the joint portion 21, and a ring 4 is provided in the middle portion with the width of each rubber ring, and a collar portion is inserted on the tube end side. A rubber ring for joining 61 serving as a guide is disposed, and a rubber ring for joint 6 is disposed on the back side away from the pipe end, and for water expansion joining between the rubber ring for joining 61 and the rubber ring for joint 6. A rubber ring 62 is provided.
In the above case, in the joint structure using the rubber ring and the collar, the rubber ring having three different roles and functions of the joining rubber ring 61, the joint rubber ring 6, and the water-expandable rubber ring 62 is connected to the joint part. By arranging in, it is possible to ensure good bondability and flexibility, and high water honey.
In order to obtain a high water honey property, the rubber ring needs to have a compression rate as uniform as possible in the pipe circumferential direction even when the pipe joint is displaced. Therefore, one so-called water-expandable rubber ring 62, which is slightly small and whose volume is expanded by water, is arranged between the two rubber rings of the joining rubber ring 61 and the joint rubber ring 6.
In this structure, when the joint of the propulsion pipe is bent due to uneven earth pressure, etc., the water-expandable rubber ring 62 has a slightly smaller cross section than the other two rubber rings. The joint rubber ring 61 and the joint rubber ring 6 mainly work so as to absorb the displacement, but as the displacement gradually progresses, the water-expandable rubber ring 62 is gradually subjected to a load due to the displacement. For this reason, the water-expandable rubber ring 62 also retains the gap B between the tube and the collar, so that the repulsive force is increased. In this way, the one that supported the bias pressure with the two rubber rings at the beginning of the displacement gradually resists the displacement with the three rubber rings, so that the flexibility of the joint portion is not greatly impaired. Since the compression rate of each rubber ring 6, 61, 62 is kept uniform above, high water honey properties can be obtained.
Even if an excessive load acts on the three rubber rings 6, 61, 62 to reduce the compression ratio of the rubber rings 6, 61, 62, even if water enters the joint from the outside of the pipe, The water-expandable rubber ring 62 disposed between the joining rubber ring 61 and the joint rubber ring 6 reacts with the invading water, and the water-expandable rubber ring 62 expands in volume, thereby achieving high water honey properties.
The water-expandable rubber ring 62 has a slightly smaller cross-sectional shape than the other two bonding rubber rings 61 and the joint rubber ring 6, and the two rubber rings 61 and the joint rubber ring 6 are used. Since it is surrounded by the rubber ring, it does not come into contact with the water outside the tube and the water inside the tube in a normal state, so that the water-expandable rubber ring 62 does not expand. Therefore, the flexibility of the joint portion is not greatly impaired.
In general, the resistance at the time of joining is almost determined by the largest rubber ring used. In this structure, since the water-expandable rubber ring 62 disposed in the middle part is formed slightly smaller than the front joining rubber ring 61, the resistance at the time of joining is such that the front joining rubber ring 61 is connected to the collar 23. Since it does not become larger than the resistance force at the time of insertion, good bondability can be obtained.
Furthermore, the water-expandable rubber ring 62 disposed in the middle part of the joint portion is short when disposed close to either the joint rubber ring 61 or the joint rubber ring 6 which are the other two rubber wheels. Even with the length of the joint, the function of the rubber ring can be effectively exhibited. That is, a space B is provided between one water-expandable rubber ring 62 and two adjacent rubber rings 61 and the rubber band 6 for coupling, and the injection hole 5 is used in the space B from the inside of the pipe. When water leakage occurs, in addition to water-stopping reinforcement by the water-expandable rubber ring 62, a fluid filler 8 of urethane-based material that reacts with water and accumulates and expands is injected. In this injection work, when the front rubber ring, the intermediate water-expandable rubber ring, and the rearmost rubber ring are arranged close to each other, the space formed between the front rubber ring and the intermediate water-expandable rubber ring The filling 8 is injected into the part.
Further, when the pipes are designed and bent by curve construction or the like, it is preferable to inject a lubricant for allowing the rubber wheels 6 and 61 to slide easily and bend easily. Therefore, it is possible to avoid the rubber wheels 6 and 61 from being worn by friction during bending. And in the case of the said joint structure, it can endure to the water pressure 0.5MPa (megapascal) which generate | occur | produces in the underground 50m vicinity.
As shown in FIGS. 6 to 10, the method for manufacturing a propulsion fume pipe according to the invention described in claim 7 has a joint portion 21 having a reduced diameter at one end of the pipe, and the joint portion 21. In addition, a hole 12a is formed at the position of the injection hole 12 of the iron plate 2 in the propulsion fume tube 1 in which the entire outer peripheral surface of the tube is covered with the iron plate 2, avoiding the spiral reinforcing bars and the vertical bars, and on the inner surface of the hole 12a. A screw socket 24 is welded, and a cylindrical body 17 fitted with a cap at the entrance is screwed into the socket 24 and then centrifugally molded.
The iron plate 2 is approximately the same diameter as the opening hole, and a socket 24 of about 30 mm is attached integrally with the iron plate, and this is placed in the formwork, and then the assembled rebar rod is placed in the formwork and prepared. After the socket 24 having a wall thickness of 1 mm is added, concrete is cast and formed. As a result, since the iron plate 2 and the socket 24 are integrated, there is no separation between the iron plate 2 and the concrete of the fume pipe for propulsion, so there is no problem in construction in a place where the external water pressure is high. Further, since the socket 24 is divided, the rebar of the rebar rod is not cut and inserted into the tube of the iron plate 2, so that the opening of the injection hole 12 does not weaken in strength.
[0006]
【The invention's effect】
Since this invention is the above structure, there exist the following effects.
(1) In a joint structure using rubber rings and collars, the rubber ring with three different roles and functions is arranged in the joint part, ensuring good bonding and flexibility, and high water honey. can do.
(2) The joint structure of the present invention can withstand a high water pressure up to 0.5 MPa (megapascal) generated in the vicinity of 50 m underground.
(3) Since the injection pipe of the injection hole is attached after the reinforcing bar is inserted, it can be set in the mold without cutting the reinforcing bar. Therefore, there is no strength reduction caused by rebar cutting.
[Brief description of the drawings]
FIG. 1 is a half cross-sectional front view of a propulsion fume tube in which an outer peripheral surface of the present invention is covered with an iron plate.
FIG. 2 is a right side view of a propulsion fume tube in which the outer peripheral surface of the present invention is covered with an iron plate.
FIG. 3 is a cross-sectional view of a joint portion of a propulsion fume pipe in which the outer peripheral surface of the present invention is covered with an iron plate.
FIG. 4 is a cross-sectional view of a joint portion according to another embodiment of the present invention.
FIG. 5 is a cross-sectional view of a joint portion in another embodiment of the present invention.
FIG. 6 is an explanatory view before molding in the method for manufacturing a propulsion fume tube of the present invention.
FIG. 7 is an explanatory view before molding of a cylindrical body attached state in the method for manufacturing a propulsion fume tube of the present invention.
FIG. 8 is a cross-sectional view of a cylindrical body in the method for manufacturing a propulsion fume tube of the present invention.
FIG. 9 is a cross-sectional view of an essential part of the method for manufacturing the propulsion fume pipe of the present invention.
FIG. 10 is an explanatory view from the inner surface side of the method for manufacturing a propulsion fume tube according to the present invention.
FIG. 11 is a cross-sectional view of a conventional propulsion fume pipe using a single water stop rubber ring. .
FIG. 12 is a cross-sectional view of a propulsion fume pipe using two conventional water stop rubber rings. .
FIG. 13 is an explanatory diagram of peeling and water leakage in a conventional propulsion fume tube. .
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 Propulsion fume pipe | tube 11 Main body 11a Spiral reinforcement 11b Longitudinal reinforcement 12 Injection hole 13 Joint part 14 Injection hole 15 Notch 16 Anchor 16a Reinforcement 17 Cylindrical body 18 Screw 19 Cap 2 Covering iron plate 21 Joint part 22 Hole 23 Collar part 24 Socket 25 Welding Part 3 Cushion material 4 Ring 41 L-shaped stopper 5 Injection hole 51 Cylindrical part 52 Cap 6 Joint rubber ring 61 Rubber band for joining 62 Rubber ring for water expansion joining 7 Color W Inner frame

Claims

一方側管端部には縮径した接合部２１を有し、該接合部２１及びその他の管外周面全体を鉄板２で被覆した推進用ヒューム管1の該接合部21に、滑剤又は止水剤を内方から注入可能に注入孔５を設け、該接合部２１の管端側にはゴム輪止め具４１を設けると共に、中間部には各ゴム輪の幅でリング４を設け、管端側には、カラー部の挿入にガイドとなる接合用ゴム輪６１を配置する共に、管端より離れて奥側には、継手用ゴム輪６を配置し、この接合用ゴム輪６１と継手用ゴム輪６間に水膨張接合用ゴム輪６２を配設することを特徴とする推進用ヒューム管の構造。One end of the pipe has a joint 21 with a reduced diameter, and the joint 21 of the propulsion fume pipe 1 in which the joint 21 and the other outer peripheral surface of the pipe are covered with the iron plate 2 is provided with a lubricant or water stop. An injection hole 5 is provided so that the agent can be injected from the inside, a rubber ring stopper 41 is provided on the tube end side of the joint portion 21, and a ring 4 is provided in the middle portion with the width of each rubber ring, On the side, a rubber band for joining 61 serving as a guide for inserting the collar portion is disposed, and on the back side away from the pipe end, a rubber ring for joint 6 is disposed. 1. A structure of a propulsion fume tube, wherein a rubber ring 62 for water expansion joining is disposed between rubber rings 6.

注入孔５は、継手用ゴム輪６と水膨張接合用ゴム輪６２との間位置に設けたことを特徴とする請求項第1項に記載の推進用ヒューム管の構造。2. The structure of a propulsion fume tube according to claim 1, wherein the injection hole 5 is provided at a position between the joint rubber ring 6 and the water expansion bonding rubber ring 62.

注入孔５は、管端に近接させ、接合用ゴム輪６１と水膨張接合用ゴム輪６２との間位置に設けたことを特徴とする請求項第1項に記載の推進用ヒューム管の構造。2. The structure of the propulsion fume pipe according to claim 1, wherein the injection hole 5 is provided close to the pipe end and provided at a position between the joining rubber ring 61 and the water expansion joining rubber ring 62. .

管内の注入孔５から空間部Ｂに、水と反応して膨張する流動性充填物を充填することを特徴とする請求項第1項に記載の推進用ヒューム管の構造。2. The structure of a propulsion fume tube according to claim 1, wherein the space B is filled from the injection hole 5 in the tube with a fluid filler that expands in response to water.

曲線施工時に、管内の注入孔５から空間部Ｂに、ゴム輪が曲がりの際の摩擦を少なくし、滑り易くする潤滑剤を注入することを特徴とする請求項第1項に記載の推進用ヒューム管の構造。2. The propulsion device according to claim 1, wherein a lubricant that reduces friction and makes the rubber ring slip easily is injected into the space B from the injection hole 5 in the pipe during curve construction. The structure of the fume tube.

一方側管端部には縮径した接合部２１を有するコンクリート製推進用ヒューム管1ａの他方端部には、端部内面にアンカー１６を溶着し、該アンカー１６より管端側に水膨張リングを配置し、前記接合部２１外周は鉄板で被覆し、該接合部21に、滑剤又は止水剤を内方から注入可能に注入孔５を設け、該接合部２１の管端側にはゴム輪止め具４１を設けると共に、中間部には各ゴム輪の幅でリング４を設け、管端側には、カラー部の挿入にガイドとなる接合用ゴム輪６１を配置する共に、管端より離れて奥側には、継手用ゴム輪６を配置し、この接合用ゴム輪６１と継手用ゴム輪６間に水膨張接合用ゴム輪６２を配設することを特徴とする推進用ヒューム管の構造。An anchor 16 is welded to the inner surface of the end of the concrete propulsion fume pipe 1a having a joint 21 having a reduced diameter at the end of the one side pipe. The outer periphery of the joint portion 21 is covered with an iron plate, and an injection hole 5 is provided in the joint portion 21 so that a lubricant or a water stop agent can be injected from the inside. A rubber is provided on the tube end side of the joint portion 21. A ring stopper 41 is provided, and a ring 4 is provided in the middle portion with the width of each rubber ring. A rubber ring 61 for joining which serves as a guide for inserting the collar portion is disposed on the tube end side. A propulsion fume tube characterized in that a joint rubber ring 6 is disposed at the far side and a water expansion joint rubber ring 62 is disposed between the joint rubber ring 61 and the joint rubber ring 6. Structure.

一方側管端部には縮径した接合部２１を有し、該接合部２１及びその他の管外周面全体を鉄板２で被覆した推進用ヒューム管１における鉄板２の注入孔１２位置に、螺旋鉄筋と縦筋を避けて孔12ａを穿設し、該孔12ａの内側面にネジを切った円筒体２４を溶着し、該円筒体２４には、入り口にキャップを嵌めた筒体１７を螺着した後、遠心成形することを特徴とする推進用ヒューム管の製造方法。One end of the pipe has a joint 21 with a reduced diameter, and a spiral is formed at the position of the injection hole 12 of the iron plate 2 in the propulsion fume pipe 1 in which the joint 21 and other outer peripheral surfaces of the pipe are covered with the iron plate 2. A hole 12a is formed avoiding the reinforcing bars and vertical bars, and a threaded cylindrical body 24 is welded to the inner surface of the hole 12a. A cylindrical body 17 fitted with a cap at the entrance is screwed into the cylindrical body 24. A method of manufacturing a fume tube for propulsion characterized by performing centrifugal molding after wearing.