JPH0637950B2 - Injection method of cement milk in pipe reverse method - Google Patents
Injection method of cement milk in pipe reverse methodInfo
- Publication number
- JPH0637950B2 JPH0637950B2 JP63162959A JP16295988A JPH0637950B2 JP H0637950 B2 JPH0637950 B2 JP H0637950B2 JP 63162959 A JP63162959 A JP 63162959A JP 16295988 A JP16295988 A JP 16295988A JP H0637950 B2 JPH0637950 B2 JP H0637950B2
- Authority
- JP
- Japan
- Prior art keywords
- pipe
- cement milk
- cement
- parts
- filling
- 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
- 239000004568 cement Substances 0.000 title claims description 29
- 239000008267 milk Substances 0.000 title claims description 23
- 210000004080 milk Anatomy 0.000 title claims description 23
- 235000013336 milk Nutrition 0.000 title claims description 23
- 238000000034 method Methods 0.000 title claims description 12
- 238000002347 injection Methods 0.000 title claims description 9
- 239000007924 injection Substances 0.000 title claims description 9
- 238000010276 construction Methods 0.000 claims description 7
- 238000004898 kneading Methods 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 6
- 239000002994 raw material Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 229920003086 cellulose ether Polymers 0.000 claims description 4
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 239000000945 filler Substances 0.000 claims description 3
- 239000000654 additive Substances 0.000 description 3
- 230000000996 additive effect Effects 0.000 description 3
- 229920003002 synthetic resin Polymers 0.000 description 3
- 239000000057 synthetic resin Substances 0.000 description 3
- 239000011440 grout Substances 0.000 description 2
- 229920005989 resin Polymers 0.000 description 2
- 239000011347 resin Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 1
- 230000009286 beneficial effect Effects 0.000 description 1
- 235000012216 bentonite Nutrition 0.000 description 1
- 238000004140 cleaning Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 238000007872 degassing Methods 0.000 description 1
- 239000000428 dust Substances 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- JEIPFZHSYJVQDO-UHFFFAOYSA-N iron(III) oxide Inorganic materials O=[Fe]O[Fe]=O JEIPFZHSYJVQDO-UHFFFAOYSA-N 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- -1 polyethylene Polymers 0.000 description 1
- 229920000573 polyethylene Polymers 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000000926 separation method Methods 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
Classifications
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16L—PIPES; JOINTS OR FITTINGS FOR PIPES; SUPPORTS FOR PIPES, CABLES OR PROTECTIVE TUBING; MEANS FOR THERMAL INSULATION IN GENERAL
- F16L1/00—Laying or reclaiming pipes; Repairing or joining pipes on or under water
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Consolidation Of Soil By Introduction Of Solidifying Substances Into Soil (AREA)
- Curing Cements, Concrete, And Artificial Stone (AREA)
Description
【発明の詳細な説明】 〔発明の目的〕 （産業上の利用分野） この発明は、パイプリバース工法におけるセメントミル
クの注入方法に関するものである。DETAILED DESCRIPTION OF THE INVENTION [Object of the Invention] (Field of Industrial Application) The present invention relates to a method for injecting cement milk in a pipe reverse method.
（従来の技術） 従来、このパイプリバース工法は、古くなった水道管等
の既設管の内壁に付着した錆瘤・スケールをクリーニン
グし除去した後、この管内にポリエチレン等の合成樹脂
を素材としたパイプを挿入し、これら既設管と合成樹脂
を素材としたパイプとの間隙にセメントミルクを圧入し
て硬化させる工法であり、セメントミルクの原料にはセ
メントと水の外、硬化を遅延させるためにベントサイト
を使用していた。(Prior Art) Conventionally, this pipe reverse construction method uses a synthetic resin such as polyethylene as a material after cleaning and removing rust marks and scales adhering to the inner wall of an existing pipe such as an old water pipe. It is a method of inserting cement and hardening cement milk by pressing it into the gap between these existing pipes and the pipe made of synthetic resin. Bent site was used.
また、圧入の方法にしても圧力が弱ければ施工時間がか
かり、また、強くすると樹脂管を内方に座屈させてしま
い破損させる場合がある。In addition, even if the method of press-fitting is used, if the pressure is weak, it will take a long time to construct, and if it is strong, the resin pipe may be buckled inward and damaged.
（発明が解決しようとする問題点） しかし、従来の方法ではセメントミルクの圧入は、硬化
時間内で施工が完了しなければならない。そのため、圧
力をかけて施工時間を短縮する場合、または、セメント
ミルクの圧入が困難となった場合は、圧力が上昇し合成
樹脂パイプを内方に座屈させる危険性が高いという欠点
があった。(Problems to be solved by the invention) However, in the conventional method, the cement milk must be press-fitted within the setting time. Therefore, when pressure is applied to shorten the construction time, or when it is difficult to press-in cement milk, there is a drawback that the pressure increases and there is a high risk of buckling the synthetic resin pipe inward. .
（問題点を解決するための手段） そこでこの発明は、上記の欠点を除去し、セメントミル
クの構成を変え、従来のベントナイト以上の流動性と硬
化後の強度が向上する添加材〔特開昭60−23687号公報
に開示〕を加え、しかも弱い圧力でセメントミルクの注
入を行い、中途に脱気装置を複数個設けてセメントミル
クのみを充填出来、施行時間を短縮することのできるパ
イプリバース工法におけるセメントミルクの注入方法を
提供するものである。(Means for Solving Problems) Therefore, the present invention eliminates the above-mentioned drawbacks, changes the composition of cement milk, and is an additive material that improves fluidity and strength after curing superior to conventional bentonites [Patent Document 1] 60-23687), and the cement milk is injected under a weak pressure, and a plurality of deaerators can be installed in the middle to fill only the cement milk, and the pipe reverse construction method that can shorten the execution time To provide a method for injecting cement milk.
以下、この発明の一実施例を図面に従って説明すると、
パイプリバース工法におけるセメントミルクの注入にお
いて、重量比でセメント１００部、水60〜80部、添加剤
としてセルロースエーテル系ＧＰＲ−３０〔信越化学工
業株式会社製〕を0.1〜0.5部添加してなるセメントミル
クを充填材（１）として用い〔好ましくは重量比でセメ
ント100部、水70部、セルロースエーテル系ＧＰＲ−30
を0.3部〕、混練されたこの充填材（１）を既設管
（２）と挿入管（３）との間隙に充填するに際し、原料
混練装置（４）と注入装置（５）に並べて脱気装置
（６）を設けたものより構成される。尚、原料混練装置
（４）の具体的一例しては、グラウトミキサーをいい、
二基設けて交互に連続して使用する。注入装置（５）の
具体的一例しては、ドラム罐内に水中ポンプ（１１）を
用いてグラウトミキサーより製造された充填材（１）を
吸引し、既設管（２）と挿入管（３）との間隙に送り充
填するものである。Hereinafter, an embodiment of the present invention will be described with reference to the drawings.
Cement made by adding 100 parts of cement, 60 to 80 parts of water, and 0.1 to 0.5 parts of cellulose ether type GPR-30 [manufactured by Shin-Etsu Chemical Co., Ltd.] as an additive in the injection of cement milk in the pipe reverse method. Milk is used as the filler (1) [preferably 100 parts by weight of cement, 70 parts of water, cellulose ether type GPR-30
0.3 part], when filling the gap between the existing pipe (2) and the insertion pipe (3) with the kneaded filler (1), the raw material kneading device (4) and the pouring device (5) are arranged side by side and degassed. It is composed of a device (6). A concrete example of the raw material kneading device (4) is a grout mixer,
Two units are provided and used alternately in succession. As a specific example of the injection device (5), the filling material (1) manufactured by the grout mixer is sucked into the drum can by using the submersible pump (11), and the existing pipe (2) and the insertion pipe (3) are sucked. ) Is to be sent and filled into the gap.
これら原料混練装置（４）および注入装置（５）は、既
設管に設けた流入部（７），流出部（８）よりも高い箇
所に設ける。The raw material kneading device (4) and the injection device (5) are provided at a position higher than the inflow part (7) and the outflow part (8) provided in the existing pipe.
また、脱気装置（６）の具体的一例としては、上方に排
気弁（９）を、下方にスプリングに抗してボール（１
０）を吊り下げた連結構造とし通常時は開口しておき、
セメントミルクに混入した空気は排気弁（９）より排出
され、セメントミルクが自然流入の状態で管内に充填さ
れるものである。また充填が自然流入では困難となった
際、ボール（１０）の位置する箇所までセメントミルク
が上昇し、排気弁（９）は閉塞状態となり、注入装置
（５）の水中ポンプ（１１）の揚程が加わり弱い加圧状
態でセメントミルクを注入する。続いて、セメントミル
クに混入した空気が分離すると、脱気装置（６）内の空
気容積は大きくなると同時に、吊下げたボール（１０）
は下方に下がり排気弁（９）より空気が排出される。Further, as a specific example of the deaerator (6), an exhaust valve (9) is provided on the upper side and a ball (1) is provided on the lower side against a spring.
0) is a suspended connection structure and normally opened,
The air mixed in the cement milk is discharged from the exhaust valve (9), and the cement milk is naturally filled into the pipe. Also, when filling becomes difficult due to natural inflow, cement milk rises up to the position of the ball (10), the exhaust valve (9) is closed, and the lift of the submersible pump (11) of the injection device (5). And cement milk is injected under a weak pressure. Then, when the air mixed in the cement milk is separated, the volume of air in the deaerator (6) increases, and at the same time, the suspended balls (10).
Goes down and air is discharged from the exhaust valve (9).
この脱気装置（６）は、管内に入る手前の注入装置
（５）付近に１基設け、既設管（２）の流入部（７）付
近に１基設けるため、間隙に空気が溜まらず完全に充填
できるものである。Since one deaerator (6) is provided near the injection device (5) before entering the pipe, and one is provided near the inflow part (7) of the existing pipe (2), air is not accumulated in the gap and is completely removed. Can be filled in.
この発明によると、セメントミルクは添加剤としてセル
ロースエーテル系ＧＰＲ−３０を用いるため、流動性に
富んでおり、本発明のセメントミルクの注入方法を採用
することによって従来の工法にくらべ１スパンの施工時
間に３〜４時間要していたものが、自然流入方式で２時
間以内に充填が完了でき、工期の短縮によるコストダウ
ンが図れる。尚、小型水中ポンプの使用が可能であり、
圧入による樹脂管の座屈は皆無となる。また、セメント
ミルクは水の分離が少ないため、一回の注入でほこぼ内
部への充填が可能であり、また、硬化後のセメントミル
クの強度が増加し、均一で強固なセメント量ができ、有
害性や危険性は全くない。また、脱気装置（６）を設け
たため、原料混練装置（４）を稼動中に気泡が混入した
り、注入装置（５）の水中ポンプが空気を吸い込んだ際
排出でき、更に、既設管（２）の流入部（７）付近にも
１基設けたため、充填後のセメントミルクから分離する
空気が発生すれば排出できる等極めて有益なる効果を奏
する。According to the present invention, since cement milk uses cellulose ether type GPR-30 as an additive, it has a high fluidity, and by adopting the method for injecting cement milk of the present invention, the construction of one span can be performed as compared with the conventional construction method. Although it took 3 to 4 hours to complete, filling can be completed within 2 hours by the natural inflow method, and the cost can be reduced by shortening the construction period. A small submersible pump can be used,
There is no buckling of the resin pipe due to press fitting. Also, since cement milk has less water separation, it is possible to fill the inside of the dust with one injection, and the strength of the cement milk after hardening increases, and a uniform and strong cement amount can be created. There is no harm or danger. Further, since the deaerator (6) is provided, air bubbles can be mixed in during the operation of the raw material kneading device (4), and air can be discharged when the submersible pump of the injecting device (5) sucks air, and the existing pipe ( Since one unit is also provided near the inflow section (7) of 2), it has an extremely beneficial effect such that if air separated from the cement milk after filling is generated, it can be discharged.
第１図は、この発明の一実施例を示す説明図である。 １……充填材、２……既設管、３……挿入管、４……原
料混練装置、５……注入装置、６……脱気装置、７……
流入部、８……流出部、９……排気弁、１０……ボー
ル、１１……水中ポンプFIG. 1 is an explanatory view showing an embodiment of the present invention. 1 ... Filling material, 2 ... Existing pipe, 3 ... Insertion pipe, 4 ... Raw material kneading device, 5 ... Injection device, 6 ... Degassing device, 7 ...
Inflow part, 8 ... Outflow part, 9 ... Exhaust valve, 10 ... Ball, 11 ... Submersible pump
フロントページの続き (72)発明者 藤田 裕司 広島県広島市中区基町９番32号 広島市水 道局内 (72)発明者 山田 宏 広島県広島市中区基町９番32号 広島市水 道局内 (72)発明者 平岩 博 広島県広島市中区基町９番32号 広島市水 道局内 (72)発明者 井上 俊雄 広島県広島市中区基町９番32号 広島市水 道局内 (56)参考文献 特開 昭60−23687（ＪＰ，Ａ) 特開 昭62−266288（ＪＰ，Ａ) 特公 昭35−384（ＪＰ，Ｂ１)(72) Inventor Yuji Fujita 9-32 Motomachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Hiroshima City Waterway Bureau (72) Inventor Hiroshi Yamada 9-32, Motomachi, Naka-ku, Hiroshima City, Hiroshima City Hiroshima City Water (72) Inventor Hiroshi Hiraiwa 9-32 Motomachi, Naka-ku, Hiroshima City, Hiroshima Prefecture Hiroshima City Waterway Bureau (72) Inventor Toshio Inoue 9-32, Motomachi Naka City, Hiroshima City, Hiroshima Prefecture Hiroshima City Waterway Station (56) References JP-A-60-23687 (JP, A) JP-A-62-266288 (JP, A) JP-B-35-384 (JP, B1)
Claims (1)
メント１００部、水６０〜８０部、セルロースエーテル
系ＧＰＲ−３０を０．１〜０．５部添加してなるセメン
トミルクを充填材として用い、混練された，該充填材を
既設管と挿入管との間隙に充填するに際し、脱気装置を
原料混練装置と注入装置に並べて設け、かつ、既設管に
も設け、弱い圧力で充填材を注入することを特徴とする
パイプリバース工法におけるセメントミルクの注入方
法。1. A pipe-reverse construction method, wherein cement milk, which is 100 parts by weight of cement, 60 to 80 parts of water, and 0.1 to 0.5 parts of cellulose ether type GPR-30, is added as a filler. When filling the kneaded and kneaded filling material into the gap between the existing pipe and the insertion pipe, a deaerator is provided side by side with the raw material kneading device and the injection device, and is also provided on the existing pipe, and the filling material is applied with a weak pressure. A method for injecting cement milk in the pipe reverse method, which comprises injecting the cement.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63162959A JPH0637950B2 (en) | 1988-06-29 | 1988-06-29 | Injection method of cement milk in pipe reverse method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP63162959A JPH0637950B2 (en) | 1988-06-29 | 1988-06-29 | Injection method of cement milk in pipe reverse method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0211985A JPH0211985A (en) | 1990-01-17 |
| JPH0637950B2 true JPH0637950B2 (en) | 1994-05-18 |
Family
ID=15764533
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63162959A Expired - Lifetime JPH0637950B2 (en) | 1988-06-29 | 1988-06-29 | Injection method of cement milk in pipe reverse method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0637950B2 (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6908167B1 (en) * | 2020-06-24 | 2021-07-21 | Ｊｆｅエンジニアリング株式会社 | Renewal method and equipment for underwater laying pipes |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS6023687A (en) * | 1983-07-18 | 1985-02-06 | 信越化学工業株式会社 | Cement group injecting material composition and method of repair construction of buried pipe using said composition |
| JPS62266288A (en) * | 1986-05-15 | 1987-11-19 | 日本鋼管株式会社 | Clearance filling method of double pipe |
-
1988
- 1988-06-29 JP JP63162959A patent/JPH0637950B2/en not_active Expired - Lifetime
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0211985A (en) | 1990-01-17 |
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