JP4152259B2

JP4152259B2 - Ceramic pipe repair method

Info

Publication number: JP4152259B2
Application number: JP2003153870A
Authority: JP
Inventors: 廣高橋; 聡越智; 洋一窪田; 禎一後藤; 潤原田; 悦雄増田
Original assignee: Tokyo Metropolitan Government; Kubota CI Co Ltd
Current assignee: Tokyo Metropolitan Government; Kubota CI Co Ltd
Priority date: 2003-05-30
Filing date: 2003-05-30
Publication date: 2008-09-17
Anticipated expiration: 2023-05-30
Also published as: JP2004353356A

Description

【０００１】
【発明の属する技術分野】
この発明は、陶管の補修工法に関し、特に、排水や下水などの陶製管路を補修用継手で補修する、陶管の補修工法に関する。
【０００２】
【従来技術】
従来の陶管の補修工法に使用する補修用継手の一例が、非特許文献１に開示されている。この種の補修用継手はその両端に受口と差口とを持つ。この継手を補修箇所のある既設管路に置き換えて、継手の受口を既設管路の差口に嵌め、継手の差口を既設管路の受口に嵌め込む。たとえば、図１１のように埋設された管路の補修工事を行う場合、長さＷ１の掘削孔１を設けて、補修箇所のある既設管路２を全て露出させる。この既設管路２を１本全て除去すると、既設管路の差口３と受口４とが残る。図１２に示す補修用継手５の受口６を既設管路の差口３に嵌め込み、もう一方の既設管路の受口４に補修用継手５の差口７を嵌め込んで切断された管路を接続する。
【０００３】
【非特許文献１】
編者「塩化ビニル管・継手協会」、「ＪＰＰＦＡ下水道用硬質塩化ビニル管ＡＳ１９」、平成１４年７月１日改正、第１５項
【０００４】
【発明が解決しようとする課題】
しかし、埋設された既設管路の継手の位置をあらかじめ特定することは困難であるため、まず図１１のように長さＷ２だけ掘削して既設管路を露出させ、その状況を確認した上で、既設管路の受口４まで掘削孔の長さＷ３を広げる（余堀り工）必要があった。この方法では、余堀り工の費用が嵩んでしまう。よって、最初の掘削孔の長さを大きくすれば良いが、長いと費用が嵩んでしまうので、現実には最初に小さく掘削し、既設管路の差口や受口が見つからなければ余堀りをするようにしている。
【０００５】
それゆえに、この発明の主たる目的は、余掘り工を必要とせず、かつ必要最小限の掘削孔長さで陶製管路の補修工事ができる、陶管の補修工法を提供することである。
【０００６】
【課題を解決するための手段】
第１の発明は、地中に埋設された陶管の補修工法であって、（ａ）合成樹脂からなり、第１および第２短管部のそれぞれの一端に陶管の端部を受容するための第１および第２受口を有し、第１および第２受口のそれぞれの下部内周上には所定の高さの突起が形成され、第２受口が第２短管部に対して管底側に所定の寸法だけ偏心された両受補修用継手を準備し、（ｂ）掘削して陶管を露出させ、（ｃ）陶管を切断して補修箇所を除去し、（ｄ）ステップ（ｃ）で形成された２つの切断端部のそれぞれを両受補修用継手の対応の受口に差し込み、（ｅ）陶管の外面に突起を当てがって、第１および第２短管部の管底と陶管の管底とを位置決めしてその状態で保持し、（ｆ）受口と陶管とを接合材によって接合し、そして（ｇ）埋め戻す、陶管の補修工法である。
第２の発明は、地中に埋設された陶管の補修工法であって、（ａ）合成樹脂からなり、第１および第２短管部のそれぞれの一端に陶管の端部を受容するための第１および第２受口を有し、第１および第２受口のそれぞれの下部内周上には突起が形成され、第２受口の突起の高さが第１受口の突起の高さより所定の寸法だけ低く形成された両受補修用継手を準備し、（ｂ）掘削して陶管を露出させ、（ｃ）陶管を切断して補修箇所を除去し、（ｄ）ステップ（ｃ）で形成された２つの切断端部のそれぞれを両受補修用継手の対応の受口に差し込み、（ｅ）陶管の外面に突起を当てがって、第１および第２短管部の管底と陶管の管底とを位置決めしてその状態で保持し、（ｆ）受口と陶管とを接合材によって接合し、そして（ｇ）埋め戻す、陶管の補修工法である。
【０００７】
【作用】
この発明では、両端部に受口を有する両受補修用継手を用いる。埋設された陶製管路を補修する場合、まず掘削して補修する既設管路を露出させる。管路の補修箇所のみを切断して除去すると、切断により２つの既設管路の端部が形成される。これらの既設管路の端部を差口として、両受補修用継手の両方の受口を差し込む。既設管路の端部の外周面と両受補修用継手の受口の内周面との間に形成された隙間に接合材を充填し固化させると、両受補修用継手で切断された既設管路を接続できる。
【０００８】
また、ゴム輪接合両受補修用継手を用いる場合、両受補修用継手を伸縮できる。したがって、これを用いて切断された既設管路を接続する場合、２つの既設管路の切断端部にある間隔に応じて補修用継手の長さを調整できる。
【０００９】
【発明の効果】
この発明によれば、両受補修用継手を陶管補修に用いるので、既設管路の補修箇所のみを切断し、切断箇所を両受け補修用継手で置き換えて繋げられる。このため、既設管路の受口を露出させる余堀り工が省略でき、かつ、掘削孔の長さを作業ができるだけの必要最小限の長さに抑えられる。したがって、陶管補修がより簡単かつ安価に行える。
【００１０】
この発明の上述の目的，その他の目的，特徴および利点は、図面を参照して行う以下の実施例の詳細な説明から一層明らかとなろう。
【００１１】
【実施例】
図１および図２に示す両受補修用継手１０が用いられる。この両受補修用継手１０はたとえば塩化ビニルなどの合成樹脂製であり、第１接続継手１２および第２接続継手１４を含む。
【００１２】
第１接続継手１２は第１短管部１６を有し、その一方の端部に拡径の第１受口１８が形成され、その他方端部は差口２０として形成される。第１受口１８の開口縁２２の内面上部には切欠２４が形成される。切欠２４の幅はＫ１である。この切欠２４は、後で説明する第２接続継手１４の切欠４２と同じように、接合材７４（図８）を流し込むためのものである。この開口縁２２の下部内周上には３つの突起２６が形成される。突起２６の高さＨ１は図８のように第１短管部１６の管底２８と上流側差口３０の管底３２との高さを等しくする高さである。
【００１３】
第２接続継手１４は第２短管部３４を有し、一方端部に拡径の第２受口３６が形成され、他方端部にゴム輪受口３８が形成される。この第２受口３６は管底側に偏心してはいるが、第１受口１８と大きさや形状がほぼ等しく、その開口縁４０には切欠４２や突起４４が形成される。この切欠４２の幅はＫ１であり、突起の高さはＨ２である。ただし、この実施例では、図８のように第２短管部３４の管底４６と下流側差口４８の管底５０との高さが等しくなるように、図２に示す第２受口３６の中心５２を第２短管部３４の中心５４よりも距離Ｓ１（第１短管部１６の厚み、および第１短管部１６と第２短管部３４との隙間の幅の和）だけ偏心させる。あるいは、第２受口３６の突起４４の高さＨ２を第１受口１８の突起２６の高さＨ１よりＳ１だけ低く形成する。
【００１４】
ゴム輪受口３８には、その開口端部の内側に沿って環状のゴム輪受容部５６が形成されており、その内側にはゴム輪５８が装着される。ゴム輪受口３８に第１短管部１６の差口２０が挿入され、両受補修用継手１０を伸縮させてその長さを調節できる。このとき、第２短管部３４の第２受口３６側の一部６０（図２）が窪んでいるため、両受補修用継手１０を縮めた場合、第１接続継手１２の差口２０がこの部分６０で止まり、第２受口３６内に入ったり、さらに第２受口３６の開口縁４０から外側に出てしまったりすることはない。
【００１５】
次に、図３〜図８を参照して、この両受補修用継手１０を使用した陶管の補修工法を説明する。
【００１６】
たとえば、図３に示す埋設された陶製の上流側管路６２の差口と下流側管路６４の受口との接合部から漏水しているとする。まず、既設管路の破損や水漏れなどの箇所を調査し、補修箇所が露出するように、図３の掘削孔６６を形成する。そして、図４に示すように、上流側管路６２および下流側管路６４の孔６６への突出長さがともにＫ２だけ残るように、補修箇所を切断し除去する。
【００１７】
次に、切断によって形成された上流側管路６２の端部、すなわち図８に示す端部３０および下流側管路６４の端部、すなわち図８に示す端部４８を差口として、両受補修用継手１０の第１受口１８および第２受口３６を嵌め込むが、その前に地上で、図２に示す両受補修用継手１０の第１受口１８の突起２６が形成されている範囲および第２受口３６の突起４４が形成されている範囲、あるいはその近傍も含む範囲に接合材６８（図５）を充填しておく。地上で予め準備しておくのは、地上で接合材６８を充填する方が掘削孔６６内で行うよりも作業性がよいからである。また、接合材６８を突起２６および４４が形成されている範囲に充填するのは、この部分を下側にして取り付けるため、充填された接合材６８が脱落しにくいからである。
【００１８】
そして、図５に示すように、両受補修用継手１０を掘削孔６６内に搬入し、それの突起２６が下側になるように、第１受口１８に既設管の上流側端部３０を挿入し、第１受口１８の突起２６をその上流側端部３０の外側に当てがい、上流側端部３０を第１受口１８の奥まで嵌め込む。すると、第１短管部１６の管底２８と上流側端部３０の管底３２との高さが等しくなる。この状態を保持するため、図６で示すように第１受口１８の下に土などの固定材７０を設ける。
【００１９】
次に図７に示すように両受補修用継手１０の第２接続継手１４を伸ばして、既設管の下流側端部４８を第２受口３６の奥まで嵌め、第２受口３６の突起４４を下流側端部４８の外側に当てがう。すると、第２短管部３４の管底４６と下流側端部４８との管底５０の高さが等しくなる。そして、第１受口１８と同様に第２受口３６の下にも固定材７２を設け、この状態を固定する。
【００２０】
最後に、図８に示すように、第１受口１８および第２受口３６に形成される切欠２４および４２からモルタルなどの接合材７４を供給して、上流側端部３０の外周面と第１受口１８の内周面との間に形成される隙間、および下流側端部４８の外周面と第２受口３６の内周面との間に形成される隙間にそれぞれ接合材７４を充填する。この接合材７４が固化すると上流側端部３０と第１受口１８との隙間、および下流側端部４８と第２受口３６との隙間が接合材７４で密封されて、上流側端部３０および第１受口１８、ならびに下流側端部４８および第２受口３６のそれぞれ互いに結合する。そして、掘削孔６６を埋め戻して、補修工事は終了する。
【００２１】
このような陶管が他企業（水道、ガス、電力、通信）の管と近接して埋設される場合、他企業の管を付け替える際の掘削や不十分な埋め戻しなどが原因で、陶管が破損して道路陥没する事例が多発している。しかし、この実施例の補修用継手を使えば、その可能性が殆んどなくなる。
【００２２】
従来の補修用継手を用いた補修工事では図１２に示すように、掘削壁面から突出する下流側管路の端部に受口が必要であったので、この受口が露出するまで掘削孔を広げなければならなかった。これに対して、図１に示す両受補修用継手１０を用いて補修工事を行うと、その第１受口１８および第２受口３６をそれぞれ上流側端部３０および下流側端部４８に接続するので、下流側端部に受口を必要とせず、したがって、従来必要とした余掘りの必要がなく経済的である。
【００２３】
また、両受補修用継手１０の受口１８および３６には切欠２４および４２が形成されている。したがって、たとえば図８に示すように第１受口１８内へ接合材７４を供給する際、第１受口１８の開口縁２２と掘削孔６６の壁面６６ａとの間の幅Ｋ３が、接合材７４を供給するために必要な幅Ｋよりも狭い場合でも、切欠２４（４２）の幅を合計した幅（Ｋ３＋Ｋ１）から接合材７４を確実に供給できる。したがって、第１受口１８の開口縁２２と掘削孔の壁面６６ａとの間に接合材７４の供給用必要幅Ｋを確保する必要がなく、切欠２４（４２）の幅を考慮した幅Ｋ３（Ｋ−Ｋ１）だけを確保すればよい。このため、掘削孔６６の長さは切欠２４の幅Ｋ１だけ狭くでき、経済的である。これと同様に、上流側端部３０および下流側端部４８の突出幅Ｋ２も切欠２４の幅Ｋ１だけ短くできる。
【００２４】
さらに、両受補修用継手１０の第１接続継手１２と第２接続継手１４とは、ゴム輪接合されているため伸縮し、既設管路の上流側端部３０と下流側端部４８との間の間隔にその長さを合わせられる。したがって、たとえば図４のように、既設管路６２および６４を切断する際、切断して形成される差口３０および４８の突出長さを合わせるなどの長さ（間隔）の微調整をする必要がない。
【００２５】
なお、第２接続継手１４の第２短管部３４に窪み６０を形成したが、第２短管部３４を図９に示すような窪みのない直線状の管としてもよい。この場合、たとえば、第１接続継手１２の第１短管部１６の長さと第２短管部３４の長さとをほぼ等しくすると、両受補修用継手１０を縮めても、第１接続継手１２の差口２０が第２接続継手１４の第２受口３６内に入ったり、第２受口３６の開口縁４０から外側に出てしまったりすることはない。
【００２６】
また、第１接続継手１２の第１受口１８の開口縁２２の下部内周上に突起２６を形成し、第２受口３６の開口縁４０の下部内周上に突起４４を形成した。これらに代えて、図９および図１０に示す突起７６および７８を設けてもよい。この突起７６および７８は各開口縁２２および４０の一部を内側に屈曲させて形成させたものであり、たとえば鉛直下方向に対し左右に２つ設けられる。突起７６の高さは突起２６の高さＨ１に等しく、突起７８の高さは突起４４の高さＨ２に等しい。さらに、各開口縁２２および４０の底になる部分で２つの突起７６および７８の間を内側に曲げて、水平面を形成する。つまり、この実施例の拡径受口１８および３６の各々は、管底側において受口外面より内方に位置する水平部８０および８２を有し、この水平部８０および８２の両側から立ち上がって、内方に突出する２つの突起７６および７８が形成される。これら開口縁２２および４０の２つの突起７６および７８、ならびに水平部８０および８２が突起２６および４４に相当し、既設管路６２および６４を支える。このような構成にすると、継手とは別に突起を形成し、突起を各受口に接続する必要がなく、拡径受け口と同時に一体成形できるため、作業の手間やコストなどの点で優れている。つまり、拡径受口１８および３６を形成するとき、外形の形状をこの実施例のように水平部８０および８２ならびに突起７６および７８を有する形状にするだけで、受口１８および３６と突起７６および７８とを同時に成形することができる。
【００２７】
これら受口１８および３６の内面に砂付加工８４を施すと、既設管路６２および６４の差口３０および４８との結合を強固にすることができる。この際、図１０（Ａ）に示すように差口３０の外周面が第１受口１８の開口縁２２の水平部８０の一部分８６および突起７６の頂点と接するため、これらの部分には砂付加工８４を施さない。第２受口３６についても同様に図１０（Ｂ）に示すように突起７８の頂点と水平部８２の一部８８に砂付加工を施さない。
【図面の簡単な説明】
【図１】この発明の一実施例に用いられる両受補修用継手を上側から見た平面図である。
【図２】図１実施例に係る両受補修用継手の線II−IIを通る縦断面図である。
【図３】この発明の一実施例の最初の工程を示す図解図である。
【図４】実施例における次の工程を示す図解図である。
【図５】実施例におけるさらに次の工程を示す図解図である。
【図６】実施例におけるさらに次の工程を示す図解図である。
【図７】実施例におけるさらに次の工程を示す図解図である。
【図８】実施例における最後の工程を示す図解図である。
【図９】図１実施例に係る両受補修用継手の他の実施例を示す縦断面図である。
【図１０】（Ａ）は図９実施例の第１受口を示す平面図である。（Ｂ）は図９実施例の第２受口を示す平面図である。
【図１１】従来の補修工法において既設管路と掘削孔とを示す図解図である。
【図１２】従来の補修工法によって補修された状態を示す図解図である。
【符号の説明】
１０…両受補修用継手
１２…第１接続継手
１４…第２接続継手
１８…第１受口
２４、４２…切欠
２６、４４…突起
３０…上流側端部
３６…第２受口
４８…下流側端部
６６…掘削孔[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a ceramic pipe repair method, and more particularly, to a ceramic pipe repair method for repairing a ceramic pipe line such as drainage or sewage with a repair joint.
[0002]
[Prior art]
An example of a repair joint used in a conventional ceramic pipe repair method is disclosed in Non-Patent Document 1. This type of repair joint has a receptacle and a receptacle at both ends. This joint is replaced with an existing pipe line having a repaired portion, and the joint receiving port is fitted into the existing pipe line opening, and the joint opening is fitted into the existing pipe line receiving port. For example, when repairing a buried pipeline as shown in FIG. 11, an excavation hole 1 having a length W1 is provided to expose all existing pipelines 2 having repair locations. When all of the existing pipelines 2 are removed, the existing pipeline's outlet 3 and receiving port 4 remain. A pipe cut by fitting the receptacle 6 of the repair joint 5 shown in FIG. 12 into the outlet 3 of the existing pipeline and fitting the receptacle 7 of the repair joint 5 into the receptacle 4 of the other existing pipeline. Connect the roads.
[0003]
[Non-Patent Document 1]
Editors “PVC Pipe and Fittings Association”, “JPPFA Hard PVC Pipe for Sewerage AS19”, revised July 1, 2002, Section 15 [0004]
[Problems to be solved by the invention]
However, since it is difficult to specify the position of the joint of the existing existing pipe in advance, first, the existing pipe is exposed by excavating the length W2 as shown in FIG. It was necessary to extend the length W3 of the excavation hole to the receiving port 4 of the existing pipe line (excess drilling work). With this method, the cost of extra excavation work increases. Therefore, it is sufficient to increase the length of the first excavation hole. However, if the length is longer, the cost will increase. I try to do it.
[0005]
Therefore, a main object of the present invention is to provide a method for repairing a ceramic pipe that does not require an extra excavation and can repair a ceramic pipe line with a minimum drilling hole length.
[0006]
[Means for Solving the Problems]
The first invention is a repairing method of the buried in the ground ceramic tube, (a) Ri Do a synthetic resin, receive the end of Suekan to one end of each of the first and second short pipe section A projection having a predetermined height is formed on a lower inner periphery of each of the first and second receptacles, and the second receptacle is a second short tube portion. Prepare a joint for both receiving and repairing eccentrically by a predetermined dimension on the tube bottom side , (b) excavating and exposing the ceramic pipe, (c) cutting the ceramic pipe and removing the repaired part, (D) Insert each of the two cut ends formed in step (c) into the corresponding receptacle of the joint for both receiving and repairing, and (e) applying a protrusion to the outer surface of the ceramic pipe, The tube bottom of the second short tube portion and the tube bottom of the ceramic tube are positioned and held in that state, (f) the receiving port and the ceramic tube are bonded with a bonding material , and (g) the ceramic tube is refilled. of This is a repair method.
A second invention is a method for repairing a ceramic pipe buried in the ground, and (a) is made of a synthetic resin, and receives an end of the ceramic pipe at one end of each of the first and second short pipe portions. For the first and second receiving ports, and a protrusion is formed on the lower inner periphery of each of the first and second receiving ports. The height of the protrusion of the second receiving port is the protrusion of the first receiving port. (B) excavating and exposing the porcelain pipe, (c) cutting the porcelain pipe to remove the repaired part, and (d) Each of the two cut end portions formed in step (c) is inserted into the corresponding receiving port of the joint for both receiving and repairing, and (e) a projection is applied to the outer surface of the ceramic pipe, and the first and second short ends The pipe bottom of the pipe part and the pipe bottom of the ceramic pipe are positioned and held in that state, (f) the receiving port and the ceramic pipe are joined by a joining material, and (g) the ceramic pipe is refilled. It is a repair method.
[0007]
[Action]
In this invention, a joint for both receiving and repairing having a receiving port at both ends is used. When repairing a buried ceramic pipeline, first the existing pipeline to be excavated and repaired is exposed. When only the repaired portion of the pipeline is cut and removed, the ends of the two existing pipelines are formed by the cutting. Using both ends of these existing pipelines as insertion ports, both receiving ports of both receiving and repairing joints are inserted. If the gap formed between the outer peripheral surface of the end of the existing pipe and the inner peripheral surface of the receiving port of both receiving and repairing joints is filled with a bonding material and solidified, the existing installation cut by both receiving and repairing joints Pipe lines can be connected.
[0008]
Moreover, when using the rubber ring joint joint for joint repair, the joint for joint repair can be expanded and contracted. Therefore, when connecting the existing pipeline cut | disconnected using this, the length of the joint for repair can be adjusted according to the space | interval in the cutting | disconnection edge part of two existing pipelines.
[0009]
【The invention's effect】
According to the present invention, since the joint for repairing both ends is used for repairing the ceramic pipe, only the repaired portion of the existing pipe line is cut and the cut portion is replaced with the joint for repairing both ends. For this reason, the extra excavation work which exposes the receiving port of the existing pipe line can be omitted, and the length of the excavation hole can be suppressed to the minimum necessary length for the work. Therefore, the ceramic pipe can be repaired more easily and cheaply.
[0010]
The above object, other objects, features and advantages of the present invention will become more apparent from the following detailed description of embodiments with reference to the drawings.
[0011]
【Example】
The joint 10 for both repair shown in FIG. 1 and FIG. 2 is used. Both the receiving and repairing joints 10 are made of a synthetic resin such as vinyl chloride, and include a first connection joint 12 and a second connection joint 14.
[0012]
The first connecting joint 12 has a first short pipe portion 16, a first receiving port 18 having an enlarged diameter is formed at one end thereof, and the other end portion is formed as a connecting port 20. A notch 24 is formed in the upper part of the inner surface of the opening edge 22 of the first receiving port 18. The width of the notch 24 is K1. This notch 24 is for pouring the bonding material 74 (FIG. 8) in the same manner as the notch 42 of the second connection joint 14 described later. Three protrusions 26 are formed on the lower inner periphery of the opening edge 22. The height H1 of the protrusion 26 is a height that makes the height of the tube bottom 28 of the first short tube portion 16 equal to the height of the tube bottom 32 of the upstream side outlet 30 as shown in FIG.
[0013]
The second connection joint 14 has a second short pipe portion 34, a second receiving port 36 having an enlarged diameter is formed at one end portion, and a rubber ring receiving port 38 is formed at the other end portion. Although the second receiving port 36 is eccentric to the tube bottom side, the second receiving port 36 has substantially the same size and shape as the first receiving port 18, and a notch 42 and a projection 44 are formed at the opening edge 40. The width of the notch 42 is K1, and the height of the protrusion is H2. However, in this embodiment, as shown in FIG. 8, the second receiving port shown in FIG. 2 is such that the height of the tube bottom 46 of the second short pipe portion 34 and the tube bottom 50 of the downstream side inlet 48 are equal. The center 52 of 36 is a distance S1 from the center 54 of the second short tube portion 34 (the sum of the thickness of the first short tube portion 16 and the width of the gap between the first short tube portion 16 and the second short tube portion 34). Just eccentric. Alternatively, the height H2 of the projection 44 of the second receiving port 36 is formed to be lower than the height H1 of the projection 26 of the first receiving port 18 by S1.
[0014]
The rubber ring receiving port 38 is formed with an annular rubber ring receiving part 56 along the inner side of the opening end part, and a rubber ring 58 is mounted on the inner side. The insertion port 20 of the first short pipe portion 16 is inserted into the rubber ring receiving port 38, and the lengths of both the receiving and repairing joints 10 can be adjusted by expanding and contracting. At this time, since a part 60 (FIG. 2) on the second receiving port 36 side of the second short pipe portion 34 is depressed, when the both repair joints 10 are contracted, the difference port 20 of the first connecting joint 12 is used. However, it does not stop at this portion 60 and does not enter the second receiving port 36 or go outside from the opening edge 40 of the second receiving port 36.
[0015]
Next, with reference to FIG. 3 to FIG. 8, a method for repairing a ceramic pipe using the joint for both receiving and repairing 10 will be described.
[0016]
For example, it is assumed that water leaks from a joint portion between the outlet of the buried ceramic upstream pipe 62 and the receiving pipe of the downstream pipe 64 shown in FIG. First, a site such as a breakage of an existing pipeline or a water leak is investigated, and the excavation hole 66 shown in FIG. 3 is formed so that the repair site is exposed. Then, as shown in FIG. 4, the repaired portion is cut and removed so that the protruding lengths of the upstream side pipe 62 and the downstream side pipe 64 into the hole 66 remain both.
[0017]
Next, both ends of the upstream pipe 62 formed by cutting, that is, the end 30 shown in FIG. 8 and the end of the downstream pipe 64, ie, the end 48 shown in FIG. The first receiving port 18 and the second receiving port 36 of the repair joint 10 are fitted, but before that, the projections 26 of the first receiving ports 18 of the both repair joints 10 shown in FIG. 2 are formed on the ground. The bonding material 68 (FIG. 5) is filled in the range where the protrusion 44 of the second receiving port 36 is formed, or the range including the vicinity thereof. The reason for preparing in advance on the ground is that the workability is better when filling the bonding material 68 on the ground than when it is performed in the excavation hole 66. Also, the reason why the bonding material 68 is filled in the area where the projections 26 and 44 are formed is that this portion is mounted on the lower side, so that the filled bonding material 68 is difficult to drop off.
[0018]
And as shown in FIG. 5, both the joints 10 for receiving repair are carried in in the excavation hole 66, and the upstream edge part 30 of the existing pipe is set in the 1st receiving port 18 so that the protrusion 26 may become a lower side. Is inserted, the protrusion 26 of the first receiving port 18 is applied to the outside of the upstream end 30, and the upstream end 30 is fitted to the back of the first receiving port 18. Then, the height of the tube bottom 28 of the first short tube portion 16 and the tube bottom 32 of the upstream end portion 30 are equal. In order to maintain this state, a fixing material 70 such as soil is provided under the first receiving port 18 as shown in FIG.
[0019]
Next, as shown in FIG. 7, the second connecting joint 14 of the both receiving and repairing joint 10 is extended, and the downstream end portion 48 of the existing pipe is fitted to the back of the second receiving port 36, and the protrusion of the second receiving port 36. 44 is applied to the outside of the downstream end 48. Then, the height of the tube bottom 50 between the tube bottom 46 of the second short tube portion 34 and the downstream end 48 becomes equal. And the fixing material 72 is provided under the 2nd receiving port 36 similarly to the 1st receiving port 18, and this state is fixed.
[0020]
Finally, as shown in FIG. 8, a joining material 74 such as mortar is supplied from the notches 24 and 42 formed in the first receiving port 18 and the second receiving port 36, and the outer peripheral surface of the upstream end 30 is The bonding material 74 is formed in a gap formed between the inner peripheral surface of the first receiving port 18 and a gap formed between the outer peripheral surface of the downstream end 48 and the inner peripheral surface of the second receiving port 36. Fill. When the bonding material 74 is solidified, the gap between the upstream end 30 and the first receiving port 18 and the gap between the downstream end 48 and the second receiving port 36 are sealed with the bonding material 74, and the upstream end 30 and the first receiving port 18, and the downstream end 48 and the second receiving port 36 are coupled to each other. Then, the excavation hole 66 is backfilled and the repair work is completed.
[0021]
When such ceramic pipes are buried in close proximity to pipes of other companies (water, gas, power, communications), due to excavation or insufficient backfill when replacing the pipes of other companies, There are many cases in which roads have collapsed due to damage. However, if the repair joint of this embodiment is used, the possibility is almost eliminated.
[0022]
In the repair work using the conventional repair joint, as shown in FIG. 12, since a receiving port is required at the end of the downstream pipe line protruding from the excavation wall surface, the excavation hole is formed until this receiving port is exposed. I had to spread it. On the other hand, when repair work is performed using the joint 10 for both repairs shown in FIG. 1, the first receiving port 18 and the second receiving port 36 are respectively connected to the upstream end 30 and the downstream end 48. Since the connection is made, a receiving port is not required at the downstream end, and therefore, there is no need for extra excavation, which is conventionally required, and it is economical.
[0023]
Further, notches 24 and 42 are formed in the receiving ports 18 and 36 of the receiving and repairing joint 10. Therefore, for example, as shown in FIG. 8, when supplying the bonding material 74 into the first receiving port 18, the width K3 between the opening edge 22 of the first receiving port 18 and the wall surface 66 a of the excavation hole 66 has a bonding material. Even when the width is smaller than the width K necessary for supplying 74, the bonding material 74 can be reliably supplied from the total width (K3 + K1) of the notches 24 (42). Therefore, it is not necessary to secure the necessary width K for supplying the bonding material 74 between the opening edge 22 of the first receiving port 18 and the wall surface 66a of the excavation hole, and the width K3 (in consideration of the width of the notch 24 (42)). Only K-K1) needs to be secured. Therefore, the length of the excavation hole 66 can be reduced by the width K1 of the notch 24, which is economical. Similarly, the protruding width K2 of the upstream end 30 and the downstream end 48 can be shortened by the width K1 of the notch 24.
[0024]
Further, the first connection joint 12 and the second connection joint 14 of the joint 10 for both repair and repair are expanded and contracted because they are joined by rubber rings, and the upstream end 30 and the downstream end 48 of the existing pipe line are expanded and contracted. The length can be adjusted to the interval between. Therefore, for example, as shown in FIG. 4, when cutting the existing pipes 62 and 64, it is necessary to finely adjust the length (interval) such as matching the protruding lengths of the differential ports 30 and 48 formed by cutting. There is no.
[0025]
In addition, although the hollow 60 was formed in the 2nd short pipe part 34 of the 2nd connection coupling 14, the 2nd short pipe part 34 is good also as a linear pipe | tube without a hollow as shown in FIG. In this case, for example, if the length of the first short pipe portion 16 and the length of the second short pipe portion 34 of the first connection joint 12 are substantially equal, the first connection joint 12 can be obtained even when both the receiving and repairing joints 10 are contracted. The differential opening 20 does not enter the second receiving port 36 of the second connection joint 14 or exit from the opening edge 40 of the second receiving port 36.
[0026]
Further, the protrusion 26 was formed on the lower inner periphery of the opening edge 22 of the first receiving port 18 of the first connection joint 12, and the protrusion 44 was formed on the lower inner periphery of the opening edge 40 of the second receiving port 36. Instead of these, protrusions 76 and 78 shown in FIGS. 9 and 10 may be provided. The projections 76 and 78 are formed by bending a part of each of the opening edges 22 and 40 inward. For example, two protrusions 76 and 78 are provided on the left and right in the vertical downward direction. The height of the protrusion 76 is equal to the height H1 of the protrusion 26, and the height of the protrusion 78 is equal to the height H2 of the protrusion 44. Further, a horizontal plane is formed by bending inwardly between the two protrusions 76 and 78 at a portion which becomes the bottom of each opening edge 22 and 40. That is, each of the enlarged diameter receiving ports 18 and 36 of this embodiment has horizontal portions 80 and 82 positioned inward from the outer surface of the receiving port on the tube bottom side, and rises from both sides of the horizontal portions 80 and 82. , Two protrusions 76 and 78 projecting inwardly are formed. The two projections 76 and 78 of the opening edges 22 and 40 and the horizontal portions 80 and 82 correspond to the projections 26 and 44 and support the existing pipelines 62 and 64. With such a configuration, a protrusion is formed separately from the joint, and it is not necessary to connect the protrusion to each receiving port, and it can be integrally formed at the same time with the enlarged diameter receiving port, which is excellent in terms of labor and cost. . That is, when forming the enlarged diameter receiving ports 18 and 36, the outer shape is simply made into a shape having the horizontal portions 80 and 82 and the projections 76 and 78 as in this embodiment. And 78 can be molded simultaneously.
[0027]
When the sanding process 84 is applied to the inner surfaces of the receiving ports 18 and 36, the connection between the existing pipes 62 and 64 and the differential ports 30 and 48 can be strengthened. At this time, as shown in FIG. 10 (A), the outer peripheral surface of the opening 30 is in contact with the portion 86 of the horizontal portion 80 of the opening edge 22 of the first receiving port 18 and the apex of the protrusion 76. No additional processing 84 is performed. Similarly, as shown in FIG. 10B, the second receiving port 36 is not subjected to sanding on the apex of the projection 78 and the part 88 of the horizontal portion 82.
[Brief description of the drawings]
FIG. 1 is a plan view of a joint for both receiving and repairing used in an embodiment of the present invention as viewed from above.
FIG. 2 is a longitudinal sectional view taken along line II-II of the joint for both-end repair according to FIG. 1 embodiment;
FIG. 3 is an illustrative view showing a first step of one embodiment of the present invention;
FIG. 4 is an illustrative view showing a next step in the embodiment.
FIG. 5 is an illustrative view showing a further next step in the embodiment.
FIG. 6 is an illustrative view showing a further next step in the embodiment.
FIG. 7 is an illustrative view showing a further next step in the embodiment.
FIG. 8 is an illustrative view showing a final step in the embodiment.
FIG. 9 is a longitudinal sectional view showing another embodiment of the joint for both-end repair according to the embodiment in FIG. 1;
10A is a plan view showing a first receiving port of the embodiment of FIG. 9; FIG. (B) is a top view which shows the 2nd receiving port of FIG. 9 Example.
FIG. 11 is an illustrative view showing existing pipelines and excavation holes in a conventional repair method.
FIG. 12 is an illustrative view showing a state repaired by a conventional repair method.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 10 ... Both joints for repair 12 ... 1st connection joint 14 ... 2nd connection joint 18 ... 1st receiving port 24, 42 ... Notch 26, 44 ... Protrusion 30 ... Upstream side edge part 36 ... 2nd receiving port 48 ... Downstream Side end 66 ... Drilling hole

Claims

地中に埋設された陶管の補修工法であって、
（ａ）合成樹脂からなり、第１および第２短管部のそれぞれの一端に前記陶管の端部を受容するための第１および第２受口を有し、前記第１および第２受口のそれぞれの下部内周上には所定の高さの突起が形成され、前記第２受口が前記第２短管部に対して管底側に所定の寸法だけ偏心された両受補修用継手を準備し、
（ｂ）掘削して前記陶管を露出させ、
（ｃ）前記陶管を切断して補修箇所を除去し、
（ｄ）前記ステップ（ｃ）で形成された２つの切断端部のそれぞれを前記両受補修用継手の対応の受口に差し込み、
（ｅ）前記陶管の外面に前記突起を当てがって、前記第１および第２短管部の管底と前記陶管の管底とを位置決めしてその状態で保持し、
（ｆ）前記受口と前記陶管とを接合材によって接合し、そして
（ｇ）埋め戻す、陶管の補修工法。It is a repair method for ceramic pipes buried in the ground,
(A) Ri Do a synthetic resin, has a first and a second receptacle for receiving an end of the ceramic tube to one end of each of the first and second short pipe section, said first and second Projections having a predetermined height are formed on the inner periphery of each lower portion of the receiving port, and the second receiving port is eccentrically displaced by a predetermined dimension toward the tube bottom side with respect to the second short tube part. Prepare the fittings for
(B) Excavating to expose the ceramic pipe;
(C) Cut the ceramic tube to remove the repaired part,
(D) Insert each of the two cut ends formed in step (c) into corresponding receptacles of the joints for both repairs,
(E) The protrusion is applied to the outer surface of the porcelain pipe, and the bottoms of the first and second short pipe portions and the bottom of the porcelain pipe are positioned and held in that state,
(F) joining the receptacle and the ceramic pipe with a joining material ; and
(G) A method for repairing pottery pipes.

地中に埋設された陶管の補修工法であって、It is a repair method for ceramic pipes buried in the ground,
（ａ）合成樹脂からなり、第１および第２短管部のそれぞれの一端に前記陶管の端部を受容するための第１および第２受口を有し、前記第１および第２受口のそれぞれの下部内周上には突起が形成され、前記第２受口の突起の高さが前記第１受口の突起の高さより所定の寸法だけ低く形成された両受補修用継手を準備し、(A) It is made of a synthetic resin, and has first and second receiving ports for receiving end portions of the ceramic pipe at one end of each of the first and second short pipe portions. Protrusions are formed on the inner circumferences of the lower portions of the mouths, and the joints for receiving and repairing are formed such that the heights of the projections of the second receiving ports are lower than the heights of the projections of the first receiving ports by a predetermined dimension. Prepare
（ｂ）掘削して前記陶管を露出させ、(B) Excavating to expose the ceramic pipe;
（ｃ）前記陶管を切断して補修箇所を除去し、(C) Cut the ceramic tube to remove the repaired part,
（ｄ）前記ステップ（ｃ）で形成された２つの切断端部のそれぞれを前記両受補修用継手の対応の受口に差し込み、(D) Insert each of the two cut ends formed in step (c) into corresponding receptacles of the joints for both receiving and repairing,
（ｅ）前記陶管の外面に前記突起を当てがって、前記第１および第２短管部の管底と前記陶管の管底とを位置決めしてその状態で保持し、(E) The projection is applied to the outer surface of the porcelain pipe, and the bottoms of the first and second short pipe portions and the bottom of the porcelain pipe are positioned and held in that state,
（ｆ）前記受口と前記陶管とを接合材によって接合し、そして(F) joining the receptacle and the ceramic pipe with a joining material; and
（ｇ）埋め戻す、陶管の補修工法。(G) A method for repairing pottery pipes.