JP2988647B2 - Rehabilitation basin and rehabilitation sewage pipeline - Google Patents
Rehabilitation basin and rehabilitation sewage pipelineInfo
- Publication number
- JP2988647B2 JP2988647B2 JP5177772A JP17777293A JP2988647B2 JP 2988647 B2 JP2988647 B2 JP 2988647B2 JP 5177772 A JP5177772 A JP 5177772A JP 17777293 A JP17777293 A JP 17777293A JP 2988647 B2 JP2988647 B2 JP 2988647B2
- Authority
- JP
- Japan
- Prior art keywords
- basin
- pipe
- rehabilitation
- concrete
- rehabilitating
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Sewage (AREA)
Description
【０００１】[0001]
【産業上の利用分野】この発明は更生桝および更生下水
管路に関し、特にたとえば既設上流管と既設下流管との
間に配置される、更生桝および更生下水管路に関する。It relates BACKGROUND OF THE INVENTION This invention rehabilitation basins and rehabilitating sewer pipe, is disposed between the particular example existing upstream pipe and the existing downstream pipe, to rehabilitation Masuichi and rehabilitating sewer pipe.
【０００２】[0002]
【従来の技術】図９に示すように、一般に民間下水と公
共下水との境界付近には、コンクリート桝１が設けられ
ており、コンクリート桝１には、上流管２および下流管
３が接続されている。このようなコンクリート桝１が老
朽化すると、地中に浸透した雨水等が接合部４および５
等からコンクリート桝１内へ流入し、下水本管６の処理
水量を超えてしまう恐れがあった。2. Description of the Related Art As shown in FIG. 9, a concrete tub 1 is generally provided near a boundary between private sewage and public sewage, and an upstream pipe 2 and a downstream pipe 3 are connected to the concrete tub 1. ing. When such a concrete basin 1 becomes obsolete, rainwater or the like that has penetrated into the ground will cause joints 4 and 5
For example, there is a possibility that the water may flow into the concrete basin 1 and exceed the treated water amount of the sewage main pipe 6.
【０００３】そこで、従来では、接合部４および５をモ
ルタルで修理したり、老朽化したコンクリート桝１を新
しいものに取り換えることによって水の流入を防止して
いた。Therefore, conventionally, the inflow of water has been prevented by repairing the joints 4 and 5 with mortar or replacing the aged concrete basin 1 with a new one.
【０００４】[0004]
【発明が解決しようとする課題】しかし、接合部をモル
タルで修理する方法では、確実に止水できないという問
題点があり、コンクリート桝を新しいものに取り換える
方法では、工事費が高く、施工性が悪く、しかも交通事
情等によって現場を開削できない場合には適用できない
という問題点があった。However, the method of repairing the joints with mortar has a problem that the water cannot be reliably stopped. The method of replacing the concrete pit with a new one has a high construction cost and a low workability. There is a problem that the method cannot be applied when the site cannot be excavated due to bad traffic conditions.
【０００５】それゆえに、この発明の主たる目的は、簡
単かつ確実に、しかも安価にコンクリート桝を更生でき
る、更生桝を提供することである。[0005] Therefore, a main object of the present invention is to provide a rehabilitating pit which can rehabilitate a concrete pit simply, reliably and inexpensively.
【０００６】[0006]
【課題を解決するための手段】第１の発明は、老朽化し
たコンクリート桝を更生するための更生桝であって、コ
ンクリート桝の上流および下流方向に対応する流入口お
よび流出口を有する桝本体、およびコンクリート桝に接
続された既設下流管と桝本体とを接続するために流出口
に接続された接続継手を備える、更生桝である。Means for Solving the Problems A first invention is a rehabilitation pit for rehabilitating an aging concrete pit, the pit body having an inlet and an outlet corresponding to the upstream and downstream directions of the concrete pit. And a connecting joint connected to an outlet for connecting an existing downstream pipe connected to the concrete basin to the basin body.
【０００７】第２の発明は、老朽化したコンクリート桝
を含む下水管路を更生して得られる更生下水管路であっ
て、コンクリート桝に接続されていた上流側管路、およ
び流入口，流出口および掃除口を有する本体と、流出口
をコンクリート桝に接続されていた下流側管路に接続す
るための接続継手とを含む桝を備え、桝の流入口と上流
側管路とをやりとり接続した、更生下水管路である。[0007] A second invention relates to an aging concrete basin.
Rehabilitation sewage pipeline obtained by rehabilitating sewage pipelines containing
Te, upstream pipe which is connected to a concrete basins, and the inlet, a body having an outlet and cleaning inlet, an outlet and connection fittings for connection to the downstream side conduit which is connected to a concrete basins This is a rehabilitation sewage pipeline that has a basin that contains a sewage line, and connects and connects the inlet of the basin and the upstream pipeline.
【０００８】[0008]
【作用】たとえば老朽化したコンクリート桝を更生する
際には、更生桝内に短管を収納して、更生桝をコンクリ
ート桝内に挿入し、接続継手を既設下流管に接続する。
そして、更生桝の流入口を利用して短管をやりとりし
て、桝本体と既設上流管とを短管を介して接続（やりと
り接続）する。For example, when rehabilitating an old concrete pit, a short pipe is stored in the pit, the pit is inserted into the concrete pit, and the connection joint is connected to the existing downstream pipe.
Then, short pipes are exchanged using the inflow port of the rehabilitation basin, and the main body and the existing upstream pipe are connected (exchange connection) via the short pipe.
【０００９】[0009]
【発明の効果】この発明によれば、現場を開削すること
なく簡単かつ確実に、しかも安価にコンクリート桝を更
生できる。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。According to the present invention, it is possible to rehabilitate a concrete pit simply and reliably without incising the site and at low cost. The above and 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.
【００１０】[0010]
【実施例】図１に示すこの実施例の更生桝１０は、塩化
ビニル等の合成樹脂からなる本体１２を含む。本体１２
の上部には、掃除口１４が形成され、また、本体１２の
上流側（図１における右側）および下流側（図１におけ
る左側）には、それぞれ流入口１６および流出口１８が
形成される。そして、流入口１６の内周面には、発泡ゴ
ム等からなるシールパッキン２０が装着され、流出口１
８には、自在継手２２が接続される。自在継手２２は、
外面略球形状のコア４４を含み、コア４４の外面には、
内面略球形状の受容部２６が嵌合されている。受容部２
６から一体に延びて差口２８が形成され、差口２８の端
部外周面には、シールパッキン３０が固着されている。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A rehabilitation box 10 of this embodiment shown in FIG. 1 includes a main body 12 made of a synthetic resin such as vinyl chloride. Body 12
A cleaning port 14 is formed in the upper portion of the main body 12, and an inlet 16 and an outlet 18 are formed on the upstream side (the right side in FIG. 1) and the downstream side (the left side in FIG. 1) of the main body 12, respectively. A seal packing 20 made of foam rubber or the like is mounted on the inner peripheral surface of the inflow port 16, and
A universal joint 22 is connected to 8. The universal joint 22
The outer surface includes a substantially spherical core 44, and the outer surface of the core 44 includes:
A receiving portion 26 having a substantially spherical inner surface is fitted. Reception part 2
A spigot 28 is formed integrally with the spigot 6, and a seal packing 30 is fixed to an outer peripheral surface of an end of the spigot 28.
【００１１】このような更生桝１０は、たとえば図２に
示すようなコンクリート桝３２を更生する場合等に用い
られる。コンクリート桝３２は本体３４を含み、本体３
４の周側面には、開口３６および３８が形成されてい
る。そして、開口３６および３８には、それぞれ上流管
４０および下流管４２がモルタル等の充填剤４４を介し
て接合されている。また、本体３４の底部には、インバ
ート４６が形成されている。Such a rehabilitation pit 10 is used, for example, when rehabilitating a concrete pit 32 as shown in FIG. The concrete box 32 includes a main body 34 and a main body 3
Openings 36 and 38 are formed in the peripheral side surface of the fourth. An upstream pipe 40 and a downstream pipe 42 are respectively connected to the openings 36 and 38 via a filler 44 such as mortar. An invert 46 is formed at the bottom of the main body 34.
【００１２】更生桝１０を用いてコンクリート桝３２を
更生する際には、更生桝１０の本体１２内に短管４８が
収納される（図１）。短管４８は、略中空円筒状の本体
５０を含み、本体５０の一方端部外周面には、シールパ
ッキン５２が固着されており、この端部が既設上流管４
０（図２）へ挿入される差口５４となる。一方、コンク
リート桝３２においては、既設上流管４０が図示しない
止水部材によって止水された後、インバート４６が砕か
れてコンクリート桝３２の内部に更生桝１０を配置する
スペースが確保される。また、コンクリート桝３２の内
部には、図３からよくわかるように、その周側面に孔５
８が形成された水抜き用パイプ６０が地中にまで延びる
ように配置され、水抜き用パイプ６０の下方端部周囲に
は、石６２が埋設される。When the concrete pit 32 is rehabilitated using the rehabilitation pit 10, a short pipe 48 is housed in the main body 12 of the rehabilitation pit 10 (FIG. 1). The short pipe 48 includes a substantially hollow cylindrical main body 50, and a seal packing 52 is fixed to an outer peripheral surface at one end of the main body 50, and this end is connected to the existing upstream pipe 4.
0 (FIG. 2). On the other hand, in the concrete box 32, after the existing upstream pipe 40 is stopped by a water stopping member (not shown), the invert 46 is crushed to secure a space for disposing the rehabilitating box 10 inside the concrete box 32. In addition, as shown in FIG.
The drainage pipe 60 in which 8 is formed is disposed so as to extend into the ground, and a stone 62 is buried around the lower end of the drainage pipe 60.
【００１３】そして、図３に示すように、更生桝１０
（図１）がコンクリート桝３２内へ挿入され、自在継手
２２（差口２８）が既設下流管４２に接続され、短管４
８（差口５４）が既設上流管４０に接続される。その
後、更生桝１０の周囲にモルタル６４が充填され、それ
によって、更生桝１０が固定される。そして、既設上流
管４０内に装着された図示しない止水部材が除去され、
更生桝１０の掃除口１４に立上げ管６６が接続され、立
上げ管６６の上端部に蓋６８が装着される。なお、更生
桝１０をコンクリート桝３２（図２）内へ挿入する必要
上、更生桝１０の水平方向における長さ（図１における
左右方向長さ）は、コンクリート桝３２の口径よりも小
さく設定される。たとえば、図１の場合、自在継手２２
の自在角度がゼロの場合の長さ（この場合に上記左右方
向長さが最も短くなる）が、コンクリート桝３２の口径
以下であればよい。[0013] Then, as shown in FIG.
(FIG. 1) is inserted into the concrete box 32, the universal joint 22 (the outlet 28) is connected to the existing downstream pipe 42, and the short pipe 4
8 (spout 54) is connected to the existing upstream pipe 40. After that, the mortar 64 is filled around the rehabilitation tub 10, thereby fixing the rehabilitation tub 10. Then, a water stop member (not shown) mounted in the existing upstream pipe 40 is removed,
A rising pipe 66 is connected to the cleaning port 14 of the rehabilitation basin 10, and a lid 68 is attached to an upper end of the rising pipe 66. In addition, since it is necessary to insert the rehabilitation pit 10 into the concrete pit 32 (FIG. 2), the length of the rehabilitation pit 10 in the horizontal direction (length in the left-right direction in FIG. 1) is set smaller than the diameter of the concrete pit 32. You. For example, in the case of FIG.
The length when the free angle of zero is zero (in this case, the length in the left-right direction is the shortest) may be equal to or smaller than the diameter of the concrete box 32.
【００１４】この実施例によれば、現場を開削すること
なく老朽化したコンクリート桝３２を更生できるので、
施工性を向上でき、しかも工事費を低減できる。また、
既存の桝（本体１２）と既存の継手（自在継手２２）と
を組み合わせることによって、簡単に製造できる。な
お、上述の実施例では、傾斜して配管された既設下流管
４２に対応し得るように、桝本体１２の流出口１８に自
在継手２２を接続するようにしているが、既設下流管４
２がほぼ水平に配管されている場合等には、自在継手２
２に代えて、たとえば図４に示すような、直管状の継手
７０が接続されてもよい。継手７０の一方端部外周面に
は、シールパッキン７２が固着され、他方端部には流出
口１８に接続されるゴム輪受口（または接着受口）７４
が形成されている。According to this embodiment, the aging concrete pit 32 can be rehabilitated without cutting the site.
Workability can be improved, and construction costs can be reduced. Also,
It can be easily manufactured by combining an existing measure (main body 12) and an existing joint (universal joint 22). In the above-described embodiment, the universal joint 22 is connected to the outlet 18 of the box body 12 so as to be able to correspond to the existing downstream pipe 42 that is inclined.
2 is installed almost horizontally, the universal joint 2
Instead of 2, for example, a straight tubular joint 70 as shown in FIG. 4 may be connected. A seal packing 72 is fixed to the outer peripheral surface at one end of the joint 70, and a rubber ring socket (or an adhesive socket) 74 connected to the outlet 18 is provided at the other end.
Are formed.
【００１５】また、この更生桝１０は、たとえば図５に
示すように、現場を開削した場合にも適用できる。この
場合には、開削部７６の内側に既設上流管４０および既
設下流管４２のそれぞれの端部を突出させることができ
るので、自在継手２２および短管４８には、差口に代え
て接着受口（またはゴム輪受口）７８および８０が形成
されてもよい。受口７８と既設上流管４０とを接合し、
受口８０と既設下流管４２とを接合すれば、管路が縮径
されないので、通水性の低下を防止できる。なお、現場
を開削した場合には、開削部７６の底部に小石８２が敷
設され、小石８２の上に砂層８４が形成され、砂層８４
で更生桝１０を安定させた後、開削部７６に図示しない
土砂が埋め戻される。The rehabilitation pit 10 can also be applied to a case where the site is cut as shown in FIG. 5, for example. In this case, since the respective ends of the existing upstream pipe 40 and the existing downstream pipe 42 can protrude inside the cutout portion 76, the universal joint 22 and the short pipe 48 are bonded to each other in place of the spigot. Mouth (or rubber ring socket) 78 and 80 may be formed. Joining the receiving port 78 and the existing upstream pipe 40,
If the receiving port 80 and the existing downstream pipe 42 are joined, the pipe is not reduced in diameter, so that a decrease in water permeability can be prevented. When the site is cut, a pebble 82 is laid at the bottom of the cut portion 76, a sand layer 84 is formed on the pebble 82, and a sand layer 84 is formed.
After the stabilization of the rehabilitation pit 10, earth and sand (not shown) are buried in the cutout portion 76.
【００１６】また、上述のそれぞれの実施例では、短管
４８を流入口１６でやりとりして既設上流管４０に接続
するようにしているが、たとえば図６に示すように、短
管４８を既設上流管４０内でやりとりして、これを更生
桝１０の流入口１６に接続するようにしてもよい。この
ように既設上流管４０を利用して短管４８をやりとりす
ると、更生桝１０内に予め短管４８を収納しておく必要
がないので、既設上流管４０が２つ以上ある場合にも適
用できる。ただし、この場合には、既設上流管４０に対
応する複数の流入口１６を有する桝本体１２を用いる必
要はある。Further, in each of the above-described embodiments, the short pipe 48 is exchanged at the inflow port 16 and connected to the existing upstream pipe 40. For example, as shown in FIG. The exchange may be performed in the upstream pipe 40 and connected to the inflow port 16 of the rehabilitation tub 10. When the short pipes 48 are exchanged using the existing upstream pipes 40 in this manner, it is not necessary to store the short pipes 48 in the rehabilitation tub 10 in advance, so that the present invention is applicable even when there are two or more existing upstream pipes 40. it can. However, in this case, it is necessary to use the cell body 12 having a plurality of inlets 16 corresponding to the existing upstream pipe 40.
【００１７】そして、上述のそれぞれの実施例では、更
生桝１０と既設上流管４０とを短管４８を介して接続す
るようにしているが、現場を開削した場合には、たとえ
ば図７に示すように、既設上流管４０を直接更生桝１０
の流入口１６に接続するようにしてもよい。さらに、こ
の発明は、コンクリート桝３２を更生する場合のほか、
下水管路の途中に新たに掃除口を設ける場合等にも適用
できる。この場合には、既設上流管４０と既設下流管４
２とがほぼ同じレベルにあるので、たとえば図８に示す
ように、流入口１６の管底と流出口１８の管底とがほぼ
同じレベルにある桝８６等が用いられ得る。この桝８６
では、本体１２の流入口１６および流出口１８が受口と
して形成され、流出口１８には接続継手としての短管８
８が接続される。そして、短管８８の一方端部が既設下
流管４２に接続され、流入口１６と既設上流管４０とが
短管９０を介して接続される。短管８８および９０の一
方端部外周面には、既設下流管４２および既設上流管４
０への挿入長さを規定するストッパ部９２が形成されて
おり、ストッパ部９２より先端側には、シールパッキン
５２が固着されている。In each of the above-described embodiments, the rehabilitation tub 10 and the existing upstream pipe 40 are connected via the short pipe 48. However, when the site is cut down, for example, as shown in FIG. As mentioned above, the existing upstream pipe 40 is directly
May be connected to the inflow port 16. Further, the present invention provides a method for rehabilitating the concrete pit 32,
The present invention can also be applied to a case where a new cleaning port is provided in the middle of a sewer pipe. In this case, the existing upstream pipe 40 and the existing downstream pipe 4
Since 2 is at substantially the same level, for example, as shown in FIG. 8, a box 86 or the like in which the pipe bottom of the inflow port 16 and the pipe bottom of the outflow port 18 are at substantially the same level can be used. This square 86
In this embodiment, the inlet 16 and the outlet 18 of the main body 12 are formed as receiving ports, and the outlet 18 has a short pipe 8 as a connection joint.
8 is connected. Then, one end of the short pipe 88 is connected to the existing downstream pipe 42, and the inflow port 16 and the existing upstream pipe 40 are connected via the short pipe 90. The existing downstream pipe 42 and the existing upstream pipe 4 are provided on the outer peripheral surfaces at one end of the short pipes 88 and 90.
A stopper portion 92 for defining the insertion length to zero is formed, and a seal packing 52 is fixed to a tip side of the stopper portion 92.
【図１】この発明の一実施例を示す図解図である。FIG. 1 is an illustrative view showing one embodiment of the present invention;
【図２】図１の実施例が適用されるコンクリート桝を示
す図解図である。FIG. 2 is an illustrative view showing a concrete box to which the embodiment of FIG. 1 is applied;
【図３】図１の実施例を用いてコンクリート桝を更生し
た状態を示す図解図である。FIG. 3 is an illustrative view showing a state where a concrete box is rehabilitated using the embodiment of FIG. 1;
【図４】この発明の他の実施例を示す図解図である。FIG. 4 is an illustrative view showing another embodiment of the present invention;
【図５】図１の実施例の他の使用例を示す図解図であ
る。FIG. 5 is an illustrative view showing another example of use of the embodiment of FIG. 1;
【図６】既設上流管内で短管をやりとりする状態を示す
図解図である。FIG. 6 is an illustrative view showing a state of exchanging short pipes in an existing upstream pipe.
【図７】図１の実施例のその他の使用例を示す図解図で
ある。FIG. 7 is an illustrative view showing another example of use of the embodiment of FIG. 1;
【図８】この発明のその他の実施例を示す図解図であ
る。FIG. 8 is an illustrative view showing another embodiment of the present invention;
【図９】従来技術を示す図解図である。FIG. 9 is an illustrative view showing a conventional technique;
１０，８６ …更生桝 １２ …桝本体 １４ …掃除口 １６ …流入口 １８ …流出口 ２２ …自在継手 ３２ …コンクリート桝 ４０ …既設上流管 ４２ …既設下流管 ４８，８８，９０ …短管 10, 86 ... rehabilitation basin 12 ... basin body 14 ... cleaning port 16 ... inflow port 18 ... outflow port 22 ... universal joint 32 ... concrete tub 40 ... existing upstream pipe 42 ... existing downstream pipe 48, 88, 90 ... short pipe
───────────────────────────────────────────────────── フロントページの続き (56)参考文献 実開 平４−77686（ＪＰ，Ｕ) 実開 昭61−152886（ＪＰ，Ｕ) (58)調査した分野(Int.Cl.6，ＤＢ名) E03F 3/00 ──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A 4-77686 (JP, U) JP-A 61-152886 (JP, U) (58) Fields surveyed (Int. Cl. 6 , DB name) E03F 3/00
Claims (3)
の更生桝であって、 前記コンクリート桝の上流および下流方向に対応する流
入口および流出口を有する桝本体、および前記コンクリ
ート桝に接続された既設下流管と前記桝本体とを接続す
るために前記流出口に接続された接続継手を備える、更
生桝。1. A rehabilitation basin for rehabilitating an aged concrete basin, wherein the basin body has an inlet and an outlet corresponding to an upstream and a downstream direction of the concrete basin, and is connected to the concrete basin. A rehabilitating basin comprising a connection joint connected to the outlet for connecting an existing downstream pipe to the basin body.
方向長さが前記コンクリート桝に入れられるような長さ
に選ばれた、請求項１記載の更生桝。2. The rehabilitating basin according to claim 1, wherein a horizontal length including the basin body and the connection joint is selected to be a length that can be accommodated in the concrete basin.
を更生して得られる更生下水管路であって、 前記コンクリート桝に接続されていた 上流側管路、およ
び流入口，流出口および掃除口を有する本体と、前記流
出口を前記コンクリート桝に接続されていた下流側管路
に接続するための接続継手とを含む桝を備え、 前記桝の前記流入口と前記上流側管路とをやりとり接続
した、更生下水管路。3. A sewer line containing an aged concrete basin.
A rehabilitating sewer pipe obtained by rehabilitating the connection, the upstream side conduit which is connected to said concrete basins, and the inlet, a body having an outlet and cleaning inlet, the outlet to the concrete basins A rehabilitation sewage pipe, comprising: a tub including a connection joint for connecting to a downstream pipe that has been provided, wherein the inflow port and the upstream pipe of the tub are exchanged and connected.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5177772A JP2988647B2 (en) | 1993-07-19 | 1993-07-19 | Rehabilitation basin and rehabilitation sewage pipeline |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP5177772A JP2988647B2 (en) | 1993-07-19 | 1993-07-19 | Rehabilitation basin and rehabilitation sewage pipeline |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0734521A JPH0734521A (en) | 1995-02-03 |
| JP2988647B2 true JP2988647B2 (en) | 1999-12-13 |
Family
ID=16036855
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP5177772A Expired - Lifetime JP2988647B2 (en) | 1993-07-19 | 1993-07-19 | Rehabilitation basin and rehabilitation sewage pipeline |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2988647B2 (en) |
Families Citing this family (10)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000205457A (en) * | 1999-01-20 | 2000-07-25 | Sekisui Chem Co Ltd | Longitudinal pipe |
| JP4219073B2 (en) * | 1999-12-27 | 2009-02-04 | 前澤化成工業株式会社 | Repair |
| JP4219074B2 (en) * | 2000-01-11 | 2009-02-04 | 前澤化成工業株式会社 | Repair cover for existing public fence |
| JP2002106051A (en) * | 2000-09-27 | 2002-04-10 | Maezawa Kasei Ind Co Ltd | Repair method and repair pit for existing manhole |
| JP3756911B2 (en) * | 2003-12-26 | 2006-03-22 | 前澤化成工業株式会社 | Inspection palate device for existing drainage |
| JP4704060B2 (en) * | 2005-02-14 | 2011-06-15 | アロン化成株式会社 | Boundary display method and boundary indicator |
| JP6290542B2 (en) * | 2013-03-29 | 2018-03-07 | 積水化学工業株式会社 | Rainwater storage and penetration facility |
| JP6820726B2 (en) * | 2016-11-22 | 2021-01-27 | 積水化学工業株式会社 | Manhole rehabilitation structure and manhole rehabilitation method |
| JP6835571B2 (en) * | 2016-12-22 | 2021-02-24 | 積水化学工業株式会社 | Manhole rehabilitation structure and construction method of manhole rehabilitation structure |
| JP7385506B2 (en) * | 2020-03-12 | 2023-11-22 | アロン化成株式会社 | Masu repair method |
-
1993
- 1993-07-19 JP JP5177772A patent/JP2988647B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0734521A (en) | 1995-02-03 |
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