JPH0734521A - Remade basin and sanitary sewage pipeline - Google Patents
Remade basin and sanitary sewage pipelineInfo
- Publication number
- JPH0734521A JPH0734521A JP17777293A JP17777293A JPH0734521A JP H0734521 A JPH0734521 A JP H0734521A JP 17777293 A JP17777293 A JP 17777293A JP 17777293 A JP17777293 A JP 17777293A JP H0734521 A JPH0734521 A JP H0734521A
- Authority
- JP
- Japan
- Prior art keywords
- basin
- pipe
- concrete
- existing
- main body
- 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.)
- Granted
Links
Landscapes
- Sewage (AREA)
Abstract
Description
【０００１】[0001]
【産業上の利用分野】この発明は更生桝および下水管路
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、更生桝および下水管路に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a rehabilitating pit and a sewer pipe, and more particularly to a rehabilitating basin and a sewer pipe disposed between an existing upstream pipe and an existing downstream pipe, for example.
【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 basin 1 is generally provided near the boundary between private sewage and public sewage, and an upstream pipe 2 and a downstream pipe 3 are connected to the concrete sewage 1. ing. When such a concrete basin 1 deteriorates, rainwater and the like that have penetrated into the ground will join the joints 4 and 5
There is a risk that the amount of treated water will flow into the concrete basin 1 from above and exceed the amount of treated water in the sewer main 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, in the past, the inflow of water was prevented by repairing the joints 4 and 5 with mortar or replacing the aged concrete tub 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 joint with mortar has a problem that the water cannot be surely stopped, and the method of replacing the concrete stake with a new one has high construction cost and workability. There was a problem that it was not applicable if the site could not 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。Therefore, a main object of the present invention is to provide a rehabilitating basin which can be simply and reliably refurbished at low cost.
【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。A first aspect of the present invention is a rehabilitating basin for rehabilitating an aged concrete basin, which has a main body having an inlet and an outlet corresponding to the upstream and downstream directions of the concrete basin. And a connection joint connected to the outlet for connecting the existing downstream pipe connected to the concrete container and the container body.
【０００７】第２の発明は、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下流側
管路に接続するための接続継手とを有する桝を備え、桝
の流入口と上流側管路とをやりとり接続した、下水管路
である。A second aspect of the present invention comprises a vessel having an upstream side pipe line, a main body having an inflow port, an outflow port and a cleaning port, and a connecting joint for connecting the outflow port to the downstream side pipe line. It is a sewer pipe that connects and connects the inflow port and the upstream pipe line.
【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 aged concrete basin, a short pipe is housed in the rehabilitation basin, the rehabilitation basin is inserted into the concrete basin, and the connection joint is connected to the existing downstream pipe.
Then, the short pipe is exchanged using the inflow port of the rehabilitated pit, and the main body of the pit and the existing upstream pipe are connected (interchange 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 stake easily and reliably at low cost without excavating the site. The above-mentioned objects, other objects, features and advantages of the present invention will become more apparent from the following detailed description of the 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 EMBODIMENT The rehabilitation basin 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 on the upper part of the main body 12, and an inlet 16 and an outlet 18 are formed on the upstream side (right side in FIG. 1) and the downstream side (left side in FIG. 1) of the main body 12, respectively. A seal packing 20 made of foamed rubber or the like is attached to the inner peripheral surface of the inflow port 16, and the outflow port 1
A universal joint 22 is connected to 8. Universal joint 22
The outer surface of the core 44 includes a core 44 having a substantially spherical outer surface.
The receiving portion 26 having a substantially spherical inner surface is fitted. Receptor 2
A spout 28 is formed integrally extending from 6 and a seal packing 30 is fixed to the outer peripheral surface of the 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 basin 10 is used, for example, when rehabilitating a concrete basin 32 as shown in FIG. The concrete basin 32 includes a body 34,
Openings 36 and 38 are formed on the peripheral side surface of No. 4. An upstream pipe 40 and a downstream pipe 42 are joined to the openings 36 and 38 via a filler 44 such as mortar. An invert 46 is formed on 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 slab 32 is rehabilitated using the rehabilitating basin 10, the short pipe 48 is housed in the main body 12 of the rehabilitating basin 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 of one end of the main body 50, and this end is provided in the existing upstream pipe 4
0 (FIG. 2) is the insertion port 54. On the other hand, in the concrete stake 32, after the existing upstream pipe 40 is stopped by a water stop member (not shown), the invert 46 is crushed to secure a space for arranging the rehabilitated stake 10 inside the concrete stake 32. In addition, as shown in FIG.
The drainage pipe 60 in which 8 is formed is arranged so as to extend into the ground, and stones 62 are buried around the lower end portion 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。Then, as shown in FIG. 3, the rehabilitation pit 10
(Fig. 1) is inserted into the concrete basin 32, the universal joint 22 (spout 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. Thereafter, the mortar 64 is filled around the rehabilitation basin 10, whereby the rehabilitation basin 10 is fixed. Then, the water blocking member (not shown) mounted in the existing upstream pipe 40 is removed,
A start-up pipe 66 is connected to the cleaning port 14 of the rehabilitation basin 10, and a lid 68 is attached to the upper end of the start-up pipe 66. Note that the length of the retreaded basin 10 in the horizontal direction (the length in the left-right direction in FIG. 1) is set smaller than the diameter of the concrete pit 32 because it is necessary to insert the retreaded basin 10 into the concrete basin 32 (FIG. 2). It For example, in the case of FIG.
The length when the free angle 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 stake 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 aged concrete stake 32 can be rehabilitated without excavating the site,
The workability can be improved and the construction cost can be reduced. Also,
It can be easily manufactured by combining an existing rod (main body 12) and an existing joint (universal joint 22). In the above-described embodiment, the universal joint 22 is connected to the outlet port 18 of the basin body 12 so as to correspond to the existing downstream pipe 42 that is inclined and installed.
2 is installed almost horizontally, etc., the universal joint 2
Instead of 2, a straight tubular joint 70 as shown in FIG. 4, for example, may be connected. A seal packing 72 is fixed to the outer peripheral surface of one end of the joint 70, and a rubber ring receptacle (or an adhesive receptacle) 74 is connected to the outflow port 18 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。Further, the rehabilitation basin 10 can be applied to the case where the site is opened and cut as shown in FIG. 5, for example. In this case, the ends of the existing upstream pipe 40 and the existing downstream pipe 42 can be made to project inside the cut-and-cut portion 76, so that 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 socket 78 and the existing upstream pipe 40,
If the receiving port 80 and the existing downstream pipe 42 are joined, since the diameter of the pipe line is not reduced, it is possible to prevent a decrease in water permeability. When the site is excavated, the pebbles 82 are laid on the bottom of the excavation part 76, and the sand layer 84 is formed on the pebbles 82.
After the rehabilitation basin 10 is stabilized by, the earth and sand (not shown) is backfilled in the excavated 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 so as to be connected to the existing upstream pipe 40. However, as shown in FIG. 6, for example, the short pipe 48 is already installed. It may be exchanged in the upstream pipe 40 and connected to the inflow port 16 of the rehabilitation basin 10. When the short pipes 48 are exchanged by using the existing upstream pipes 40 in this way, it is not necessary to store the short pipes 48 in the rehabilitation basin 10 in advance, and therefore, it is also applicable when there are two or more existing upstream pipes 40. it can. However, in this case, it is necessary to use the container main body 12 having a plurality of inflow ports 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-mentioned embodiments, the rehabilitating pit 10 and the existing upstream pipe 40 are connected via the short pipe 48. As described above, the existing upstream pipe 40 is directly connected to the rehabilitation pit 10.
You may make it connect to the inflow port 16 of this. In addition to the case of rehabilitating the concrete basin 32, the present invention
It can also be applied to the case where a new cleaning port is provided in the middle of the sewer pipe. In this case, the existing upstream pipe 40 and the existing downstream pipe 4
Since 2 and 2 are at substantially the same level, for example, as shown in FIG. 8, a rod 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 cell 86
Then, the inflow port 16 and the outflow port 18 of the main body 12 are formed as receiving ports, and the outflow port 18 has the short pipe 8 as a connecting joint.
8 are 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. On the outer peripheral surface of one end of the short pipes 88 and 90, the existing downstream pipe 42 and the existing upstream pipe 4 are provided.
A stopper portion 92 that defines the insertion length into 0 is formed, and a seal packing 52 is fixed to the tip end 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 stake 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 basin is rehabilitated using the embodiment of FIG.
【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。5 is an illustrative view showing another example of use of the embodiment in FIG. 1. FIG.
【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 where a short pipe is exchanged 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 usage example of the embodiment in FIG.
【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… Rehabilitated basin 12… Mast main body 14… Cleaning port 16… Inflow port 18… Outflow port 22… Universal joint 32… Concrete basin 40… Existing upstream pipe 42… Existing downstream pipe 48,88,90… Short pipe
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 rehabilitating basin for rehabilitating an aged concrete basin, which is connected to the concrete basin having an inlet and an outlet corresponding to upstream and downstream directions of the concrete basin. A rehabilitation stile comprising a connection joint connected to the outflow port for connecting an existing downstream pipe and the stub 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 rehabilitation stile according to claim 1, wherein a horizontal length including the stake body and the connection joint is selected such that it can be put into the concrete stake.
掃除口を有する本体と前記流出口を下流側管路に接続す
るための接続継手とを有する桝を備え、 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、下水管路。3. A flow box comprising: a main body having an upstream pipe line, an inflow port, an outflow port, and a cleaning port; and a connection joint for connecting the outflow port to the downstream pipe line. A sewage pipe line in which the inlet and the upstream pipe line 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 true JPH0734521A (en) | 1995-02-03 |
| JP2988647B2 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) |
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000205457A (en) * | 1999-01-20 | 2000-07-25 | Sekisui Chem Co Ltd | Longitudinal pipe |
| JP2001182144A (en) * | 1999-12-27 | 2001-07-03 | Maezawa Kasei Ind Co Ltd | Repairable catch basin |
| JP2001193147A (en) * | 2000-01-11 | 2001-07-17 | Maezawa Kasei Ind Co Ltd | Repair cover for existing public inlet |
| JP2002106051A (en) * | 2000-09-27 | 2002-04-10 | Maezawa Kasei Ind Co Ltd | Repair method and repair pit for existing manhole |
| JP2005188247A (en) * | 2003-12-26 | 2005-07-14 | Maezawa Kasei Ind Co Ltd | Inspection port cover device of existing catch basin |
| JP2006221065A (en) * | 2005-02-14 | 2006-08-24 | Aron Kasei Co Ltd | Boundary display method and boundary display implement |
| JP2014198952A (en) * | 2013-03-29 | 2014-10-23 | 積水化学工業株式会社 | Inspection member and rainwater storage infiltration facility |
| JP2018084068A (en) * | 2016-11-22 | 2018-05-31 | 積水化学工業株式会社 | Manhole rehabilitation structure and manhole rehabilitation method |
-
1993
- 1993-07-19 JP JP5177772A patent/JP2988647B2/en not_active Expired - Lifetime
Cited By (8)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2000205457A (en) * | 1999-01-20 | 2000-07-25 | Sekisui Chem Co Ltd | Longitudinal pipe |
| JP2001182144A (en) * | 1999-12-27 | 2001-07-03 | Maezawa Kasei Ind Co Ltd | Repairable catch basin |
| JP2001193147A (en) * | 2000-01-11 | 2001-07-17 | Maezawa Kasei Ind Co Ltd | Repair cover for existing public inlet |
| JP2002106051A (en) * | 2000-09-27 | 2002-04-10 | Maezawa Kasei Ind Co Ltd | Repair method and repair pit for existing manhole |
| JP2005188247A (en) * | 2003-12-26 | 2005-07-14 | Maezawa Kasei Ind Co Ltd | Inspection port cover device of existing catch basin |
| JP2006221065A (en) * | 2005-02-14 | 2006-08-24 | Aron Kasei Co Ltd | Boundary display method and boundary display implement |
| JP2014198952A (en) * | 2013-03-29 | 2014-10-23 | 積水化学工業株式会社 | Inspection member and rainwater storage infiltration facility |
| JP2018084068A (en) * | 2016-11-22 | 2018-05-31 | 積水化学工業株式会社 | Manhole rehabilitation structure and manhole rehabilitation method |
Also Published As
| Publication number | Publication date |
|---|---|
| JP2988647B2 (en) | 1999-12-13 |
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