JP2641713B2 - Manhole repairing method, closing material, manhole repairing material and expanding tool - Google Patents
Manhole repairing method, closing material, manhole repairing material and expanding toolInfo
- Publication number
- JP2641713B2 JP2641713B2 JP7184852A JP18485295A JP2641713B2 JP 2641713 B2 JP2641713 B2 JP 2641713B2 JP 7184852 A JP7184852 A JP 7184852A JP 18485295 A JP18485295 A JP 18485295A JP 2641713 B2 JP2641713 B2 JP 2641713B2
- Authority
- JP
- Japan
- Prior art keywords
- manhole
- repairing
- repair material
- diameter
- manhole repair
- 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 - Fee Related
Links
- 239000000463 material Substances 0.000 title claims description 249
- 238000000034 method Methods 0.000 title claims description 35
- 239000007788 liquid Substances 0.000 claims description 16
- 239000004033 plastic Substances 0.000 claims description 12
- 229920003023 plastic Polymers 0.000 claims description 12
- 238000005520 cutting process Methods 0.000 claims description 11
- 230000002093 peripheral effect Effects 0.000 claims description 4
- 238000003825 pressing Methods 0.000 claims description 4
- 239000011440 grout Substances 0.000 claims 1
- 238000002360 preparation method Methods 0.000 claims 1
- 238000002347 injection Methods 0.000 description 24
- 239000007924 injection Substances 0.000 description 24
- 229920005989 resin Polymers 0.000 description 13
- 239000011347 resin Substances 0.000 description 13
- 238000010586 diagram Methods 0.000 description 11
- 239000010410 layer Substances 0.000 description 9
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 9
- 239000003822 epoxy resin Substances 0.000 description 8
- 229920000647 polyepoxide Polymers 0.000 description 8
- 239000012790 adhesive layer Substances 0.000 description 7
- 239000000725 suspension Substances 0.000 description 7
- 239000003566 sealing material Substances 0.000 description 6
- 239000010865 sewage Substances 0.000 description 6
- 239000000945 filler Substances 0.000 description 5
- 229920002050 silicone resin Polymers 0.000 description 5
- 230000004308 accommodation Effects 0.000 description 4
- 229920001971 elastomer Polymers 0.000 description 4
- -1 polyethylene Polymers 0.000 description 4
- 239000005060 rubber Substances 0.000 description 4
- 238000007789 sealing Methods 0.000 description 4
- 239000004925 Acrylic resin Substances 0.000 description 3
- 229920000178 Acrylic resin Polymers 0.000 description 3
- 238000005260 corrosion Methods 0.000 description 3
- 230000007797 corrosion Effects 0.000 description 3
- 230000000694 effects Effects 0.000 description 3
- 239000003673 groundwater Substances 0.000 description 3
- 238000003780 insertion Methods 0.000 description 3
- 230000037431 insertion Effects 0.000 description 3
- 239000004570 mortar (masonry) Substances 0.000 description 3
- 229920001187 thermosetting polymer Polymers 0.000 description 3
- 229920006305 unsaturated polyester Polymers 0.000 description 3
- 239000005062 Polybutadiene Substances 0.000 description 2
- 239000004698 Polyethylene Substances 0.000 description 2
- 239000004743 Polypropylene Substances 0.000 description 2
- 239000003795 chemical substances by application Substances 0.000 description 2
- 238000004140 cleaning Methods 0.000 description 2
- 230000007613 environmental effect Effects 0.000 description 2
- 238000009787 hand lay-up Methods 0.000 description 2
- 238000009434 installation Methods 0.000 description 2
- 230000014759 maintenance of location Effects 0.000 description 2
- 238000000465 moulding Methods 0.000 description 2
- 229920002857 polybutadiene Polymers 0.000 description 2
- 229920000573 polyethylene Polymers 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 230000003014 reinforcing effect Effects 0.000 description 2
- 238000005507 spraying Methods 0.000 description 2
- 239000000758 substrate Substances 0.000 description 2
- 229920002803 thermoplastic polyurethane Polymers 0.000 description 2
- 229920006337 unsaturated polyester resin Polymers 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000004593 Epoxy Substances 0.000 description 1
- JOYRKODLDBILNP-UHFFFAOYSA-N Ethyl urethane Chemical compound CCOC(N)=O JOYRKODLDBILNP-UHFFFAOYSA-N 0.000 description 1
- 229920002430 Fibre-reinforced plastic Polymers 0.000 description 1
- 239000004952 Polyamide Substances 0.000 description 1
- 239000004820 Pressure-sensitive adhesive Substances 0.000 description 1
- 229910000639 Spring steel Inorganic materials 0.000 description 1
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 1
- NIXOWILDQLNWCW-UHFFFAOYSA-N acrylic acid group Chemical group C(C=C)(=O)O NIXOWILDQLNWCW-UHFFFAOYSA-N 0.000 description 1
- 239000002390 adhesive tape Substances 0.000 description 1
- 230000000903 blocking effect Effects 0.000 description 1
- 239000004568 cement Substances 0.000 description 1
- 239000000919 ceramic Substances 0.000 description 1
- 230000002349 favourable effect Effects 0.000 description 1
- 239000000835 fiber Substances 0.000 description 1
- 239000011151 fibre-reinforced plastic Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 239000002184 metal Substances 0.000 description 1
- 239000012778 molding material Substances 0.000 description 1
- 238000012544 monitoring process Methods 0.000 description 1
- 229920002647 polyamide Polymers 0.000 description 1
- 238000007781 pre-processing Methods 0.000 description 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical class S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 description 1
- 229910052815 sulfur oxide Inorganic materials 0.000 description 1
- 230000008961 swelling Effects 0.000 description 1
- 229920001169 thermoplastic Polymers 0.000 description 1
- 238000004078 waterproofing Methods 0.000 description 1
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Description
【０００１】[0001]
【産業上の利用分野】本発明はマンホール内をライニン
グして補修するマンホール補修方法並びにこの補修方法
に用いるのに特に適した閉塞材、マンホール補修材及び
拡径具に関する。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing a manhole by lining the inside of a manhole, and a closing material, a manhole repairing material, and a tool for expanding the diameter of the manhole, which are particularly suitable for use in this method.
【０００２】[0002]
【従来の技術】マンホールは一般的にコンクリート製で
あり、長い間には地中管、特に下水管内で発生する硫化
水素や雨水中の硫黄酸化物によって内壁面が腐食する。
また、マンホールの多くは公道に埋設されているために
車両の振動によって内壁面に亀裂が発生する場合もあ
る。マンホールの内壁面の腐食が進行したり、内壁面に
亀裂が生じたりすると地下水が地中管内に侵入し、下水
管の場合には侵入した地下水により下水量が増大し、下
水処理工数の増加をまねく可能性もある。この状態をさ
らに放置すればマンホールの崩壊のおそれもあるので、
適当な時期にマンホールの内壁面を補修しなければなら
ない。2. Description of the Related Art Manholes are generally made of concrete, and for a long time, the inner wall surface is corroded by hydrogen sulfide generated in underground pipes, especially in sewer pipes, and sulfur oxides in rainwater.
In addition, since many manholes are buried on public roads, cracks may occur on the inner wall surface due to vehicle vibration. If corrosion of the inner wall of the manhole progresses or cracks occur on the inner wall, groundwater will enter the underground pipe, and in the case of sewage pipe, the amount of sewage will increase due to the infiltrated groundwater, and the number of man-hours for sewage treatment will increase. There is also a possibility of doing it. If this state is left further, there is a risk of collapse of the manhole,
The inner wall of the manhole must be repaired at an appropriate time.
【０００３】マンホールの内壁面の補修方法としては、
例えば特開昭６４−２９５２６号公報、特開昭６４−４
３６２３号公報又は特開平１−１９８３２５号公報に記
載されているように、筒状のマンホール補修材を内壁面
に固着させるものが一般的に採用されているが、セラミ
ック含有液状樹脂や硬質液状ウレタン樹脂を内壁面に吹
き付けてライニング層を形成するという方法も用いられ
ている。As a method for repairing the inner wall surface of a manhole,
For example, JP-A-64-29526 and JP-A-64-4
As described in Japanese Patent No. 3623 or JP-A-1-198325, a method of fixing a cylindrical manhole repair material to an inner wall surface is generally adopted, but a ceramic-containing liquid resin or a hard liquid urethane is used. A method of spraying a resin onto an inner wall surface to form a lining layer has also been used.
【０００４】[0004]
【発明が解決しようとする課題】ところで、マンホール
の内壁面が激しく腐食していたり、大きな亀裂が生じて
いる場合に上記の補修方法を用いてライニング層を形成
すると、腐食や亀裂に応じて、形成されるライニング層
が凹凸にうねって補修内面の仕上がり具合がよくない。
しかも、内壁面に液状樹脂を吹き付ける方法では、内壁
面から地下水が侵入している場合には侵入部分で樹脂が
充分に内壁面に接着せず、この部分のライニング層が剥
がれ落ちるおそれがある。By the way, when the inner wall surface of the manhole is severely corroded or a large crack is formed, if the lining layer is formed by using the above-mentioned repairing method, the lining layer is formed according to the corrosion and the crack. The lining layer to be formed undulates and the finish of the repaired inner surface is not good.
Moreover, in the method in which the liquid resin is sprayed on the inner wall surface, when the groundwater intrudes from the inner wall surface, the resin does not sufficiently adhere to the inner wall surface at the invading portion, and the lining layer at this portion may be peeled off.
【０００５】このような問題を解決するためには、内壁
面を高圧水等で清掃した後に漏水部分を急結セメント等
で止水し、その後、モルタルで内壁面の凹凸を修正して
平滑面を形成する前処理作業が必要となるが、この前処
理作業の完了には数日を要するので作業効率が悪く、ま
た交通障害の発生も問題視されている。In order to solve such a problem, after cleaning the inner wall surface with high-pressure water or the like, the leaked portion is stopped with quick-setting cement or the like, and then the unevenness of the inner wall surface is corrected with mortar to smooth the surface. However, it takes several days to complete the pre-processing work, so that the work efficiency is poor, and the occurrence of traffic obstacles is also regarded as a problem.
【０００６】そこで、十分な補修効果を有し、しかも内
面が平滑であるライニング層を短時間で形成することの
できるマンホール補修方法として、内壁面を隙間を有し
て覆うようにプラスチック製の薄肉の筒状マンホール補
修材をマンホール内に配置し、その後、内壁面とこのマ
ンホール補修材との隙間にライニング用硬化性注入材を
充填して硬化させるという補修方法が提案されている
が、本発明は、内面が平滑であるライニング層をより簡
単に得ることのできるマンホール補修方法並びにこの補
修方法に用いるのに適した閉塞材、マンホール補修材及
び拡径具の提供を目的とする。Therefore, a manhole repairing method which has a sufficient repairing effect and can form a lining layer having a smooth inner surface in a short time has been proposed as a method of repairing a manhole by covering a thin wall of a plastic so as to cover the inner wall surface with a gap. A repair method has been proposed in which a tubular manhole repair material is placed in a manhole, and thereafter, a gap between the inner wall surface and the manhole repair material is filled with a hardening injection material for lining and cured. An object of the present invention is to provide a method for repairing a manhole, which can more easily obtain a lining layer having a smooth inner surface, and a plugging material, a manhole repairing material, and an expanding tool suitable for use in the repair method.
【０００７】[0007]
【課題を解決するための手段】この目的を達成するた
め、本発明のマンホール補修方法は、縦方向に１箇所切
断されたプラスチック製の薄肉の筒状マンホール補修材
を用いてマンホール内をライニングし補修するマンホー
ル補修方法であって、マンホール内壁面の直壁部を覆う
ための複数個のマンホール補修材、及び必要に応じて斜
壁部を覆うためのマンホール補修材を準備する準備工程
と、マンホール内の流水路への液漏れを防止するために
下水管口位置に閉塞材を配置する閉塞工程と、前記マン
ホール補修材をオーバーラップ状態となるように縮径さ
せ、順次マンホール内に挿入して嵌め込み積み重ねる積
み重ね工程と、積み重ね工程中又は積み重ね工程後に、
前記マンホール補修材を拡径させ、マンホール内壁面を
隙間を有して覆う状態に保持する拡径工程と、マンホー
ル内壁面と前記マンホール補修材との前記隙間に液状の
ライニング用硬化性注入材を充填して硬化させるライニ
ング工程と、を行うものである。最も下側に位置すべき
マンホール補修材の下端は閉塞材上に載せられることが
好ましく、この場合には閉塞材に収容溝を形成してお
き、マンホール補修材の下端がこの収容溝に収まって載
せられるようにするのが効果的である。また、下側に位
置すべき前記マンホール補修材の上端部及び上側に位置
すべき前記マンホール補修材の下端部の一方の内径を大
径に形成しておき、マンホール補修材の積み重ね工程で
は、他方をこの一方の内側に嵌め込むことにより積み重
ねるようにするのが好ましい。さらに、マンホール補修
材の切断箇所の周方向一端部を、内径が大径となるよう
に形成しておき、マンホール補修材の拡径工程では、こ
の一端部の内側に他端部が重なるようにマンホール補修
材を拡径するのが適当である。In order to achieve this object, a method for repairing a manhole according to the present invention comprises lining the inside of a manhole with a thin cylindrical manhole repair material made of plastic cut at one place in a longitudinal direction. A manhole repair method for repairing, comprising: a plurality of manhole repair materials for covering a straight wall portion of an inner wall surface of a manhole, and a manhole repair material for covering a slope wall portion if necessary; A closing step of arranging a closing material at a sewer pipe opening position in order to prevent leakage of liquid into a flowing water channel therein, and reducing the diameter of the manhole repairing material so as to be in an overlapping state, and sequentially inserting the manhole repairing material into the manhole. In the stacking process of fitting and stacking, during or after the stacking process,
The diameter of the manhole repair material is increased, a diameter increasing step of holding the manhole inner wall surface in a state of covering with a gap, and a liquid lining curable injection material in the gap between the manhole inner wall surface and the manhole repair material. And a lining step of filling and curing. It is preferable that the lower end of the manhole repairing material to be positioned at the lowermost side be placed on the closing material, in which case a housing groove is formed in the closing material, and the lower end of the manhole repairing material fits into the housing groove. It is effective to be able to put on. In addition, one inner diameter of the upper end of the manhole repair material to be located on the lower side and the lower end of the manhole repair material to be located on the upper side is formed to have a large diameter, and in the step of stacking the manhole repair material, Are preferably stacked by fitting them into the inside of one of them. Further, one end in the circumferential direction of the cut portion of the manhole repair material is formed so that the inner diameter is large, and in the step of expanding the diameter of the manhole repair material, the other end overlaps the inside of the one end. It is appropriate to expand the manhole repair material.
【０００８】流水路への液漏れ防止用の本発明の閉塞材
は、下水管口部分のマンホール内壁面に対応するように
湾曲する背板部と、この背板部から内側に延びる載置用
底部と、から構成されたものであり、さらに、載置用底
部の内側に、背板部との間に細い収容溝を構成する前板
部を備えていることが効果的である。[0008] A plugging material of the present invention for preventing leakage of liquid into a flowing water channel has a back plate portion curved so as to correspond to the inner wall surface of a manhole at a mouth of a sewer pipe, and a mounting member extending inward from the back plate portion. And a bottom portion, and it is effective that a front plate portion forming a thin accommodating groove between the mounting portion and the back plate portion is provided inside the mounting bottom portion.
【０００９】マンホール内壁面の直壁部を隙間を有して
覆うための本発明のマンホール補修材は、プラスチック
製の薄肉の筒状体を縦方向に１箇所切断し、この筒状体
の上端部内側又は下端部内側を大径に形成して構成した
ものであり、複数個積み重ねられて直壁部全体を覆い、
また、マンホール内壁面の斜壁部を隙間を有して覆うた
めの本発明のマンホール補修材は、截頭円錐状部と、こ
の截頭円錐状部の下端に設けられた円筒状部と、から形
成されたプラスチック製の薄肉の筒状体を、縦方向に一
箇所切断して構成したものである。筒状体の外周面には
複数個の小さなリブが一体的に形成されていることが好
ましく、また、切断箇所の周方向一端部の内径が大径と
なるように形成されていることが適当である。そして、
いずれのマンホール補修材も透明又は半透明であること
が効果的である。The manhole repairing material of the present invention for covering the straight wall portion of the inner wall surface of the manhole with a gap is provided by cutting a thin plastic body at one position in the vertical direction, and cutting the upper end of the cylindrical body. It is configured by forming the inside of the part or the inside of the lower end to have a large diameter, and covers the entire straight wall part by stacking a plurality,
Further, the manhole repair material of the present invention for covering the inclined wall portion of the inner wall surface of the manhole with a gap, a frusto-conical portion, a cylindrical portion provided at the lower end of the frusto-conical portion, Is formed by cutting a thin cylindrical body made of plastic from one place in the vertical direction. It is preferable that a plurality of small ribs are integrally formed on the outer peripheral surface of the tubular body, and it is also preferable that the inner diameter of one end in the circumferential direction of the cut portion is formed to be large. It is. And
It is effective that any manhole repair material is transparent or translucent.
【００１０】マンホール補修材を拡径させる本発明の拡
径具は、一箇所切断されて切断位置の両端部が重ね合わ
されたリング体と、前記両端部の重なり幅を調整してこ
の両端部を固定するストッパと、から構成され、マンホ
ール内でマンホール補修材の内面を押圧する。[0010] The diameter expanding tool of the present invention for expanding the diameter of the repair material for manhole is a ring body cut at one position and having both ends overlapped at the cutting position, and the overlapping width of the both ends is adjusted to adjust the both ends. And a stopper for fixing the inner surface of the manhole repair material in the manhole.
【００１１】[0011]
【作用】多くの場合、立てた状態を保持することのでき
る剛性を備えたマンホール補修材（繊維強化プラスチッ
ク製の場合が多い）を用い、しかもマンホール補修材全
体をマンホール内壁面に直接押し付けてライニング層を
形成するわけではないので、マンホール補修材に内壁面
の凹凸に対応したうねりは生じにくい。マンホール補修
材とライニング用硬化性注入材（常温硬化性である場合
が多い）とによりきわめて優れた補修効果が達成される
のであるが、場合によってはライニング用硬化性注入材
が硬化した後にマンホール補修材を取り去って注入材だ
けでライニング層を構成することもある。この場合にも
ライニング用硬化性注入材の内面はマンホール補修材と
接触していたので平滑に形成されている。マンホール補
修材の外周面にはリブが設けられるのが普通であり、こ
のリブがマンホール内壁面に押し付けられるまでマンホ
ール補修材を拡径させれば、マンホール補修材とマンホ
ール内壁面との間には自動的に所定の隙間が形成される
こととなる。ライニング用硬化性注入材の充填されない
部分が広く又は長くならないように、リブとして小さな
突起状のものを複数個（多数個）設けることが多く、こ
のリブをマンホール補修材の成形時に一体的に形成する
場合には、内側が凹状となることが多い。また、リブの
内側を凹状としておけば、マンホール補修材を重量の小
さなものとして構成することができる。マンホール内壁
面とマンホール補修材との隙間に充填されたライニング
用硬化性注入材は内壁面の腐食部分や亀裂に入り込んで
十分な止水機能や補強機能を有することとなる。したが
って、前処理作業としては必要に応じて高圧水や回転ブ
ラシなどを用いて内壁面の清掃を行なえば十分である。[Function] In many cases, a manhole repairing material (often made of fiber reinforced plastic) with rigidity that can maintain the standing state is used, and the entire manhole repairing material is directly pressed against the inner wall surface of the manhole. Since no layer is formed, undulations corresponding to the irregularities of the inner wall surface are less likely to occur in the manhole repair material. An excellent repair effect can be achieved by using a repair material for manholes and a hardening filler for lining (often cold-curable). However, in some cases, manhole repair is performed after the hardening filler for lining is cured. In some cases, the lining layer is formed by removing the material and using only the injected material. Also in this case, the inner surface of the lining curable injection material is in contact with the manhole repair material, and is therefore formed smoothly. It is common that a rib is provided on the outer peripheral surface of the manhole repair material, and if the manhole repair material is expanded until the rib is pressed against the manhole inner wall surface, the gap between the manhole repair material and the manhole inner wall surface is increased. A predetermined gap is automatically formed. In order to prevent the unfilled portion of the lining curable filler from being filled or elongated, a plurality of small protrusions (many) are often provided as ribs, and these ribs are integrally formed when the manhole repair material is molded. If so, the inside is often concave. If the inside of the rib is concave, the manhole repairing material can be configured to have a small weight. The hardening injection material for lining filled in the gap between the inner wall surface of the manhole and the repair material for the manhole enters a corroded portion or a crack of the inner wall surface and has a sufficient water stopping function and a reinforcing function. Therefore, it is sufficient to clean the inner wall surface using high-pressure water, a rotating brush, or the like as necessary for the pretreatment operation.
【００１２】マンホールの下側には下水管口（流水路）
が開口しているので、充填されたライニング用硬化性注
入材がこの下水管口に漏れ出ないように閉塞材で下水管
口を塞ぐ必要がある。マンホール底面が平坦に構成され
ている場合には、単純なプレート状の閉塞材を用いて下
水管口を塞げばよいが、図１６に示すように下水管口Ｅ
に連なってマンホール底面Ｆに流水溝Ｈ（流水路）が形
成されている場合には、ライニング用硬化性注入材がこ
の流水溝Ｈに漏れ出ることをも防止しなければならな
い。閉塞材が背板部の内側に、最も下側に位置すべきマ
ンホール補修材の下端を載せるための載置用底部を備え
ていれば、この背板部が下水管口Ｅの上半分を塞ぎ、か
つ載置用底部が流水溝Ｈを跨ぐように閉塞材を配置し、
載せられたマンホール補修材と閉塞材との間を密封して
流水溝Ｈへの液漏れを防止することができる。さらに、
載置用底部の内側に前板部を形成してこの前板部と背板
部との間に細い収容溝を構成し、マンホール補修材の下
端をこの収容溝に収容すれば、シール材を用いてマンホ
ール補修材と閉塞材との間に十分な密封構造を簡単に構
成することができ、しかも、最も下側に位置すべきマン
ホール補修材を安定した状態で配置することが可能とな
る。[0012] Below the manhole, the sewer pipe mouth (running channel)
Is open, it is necessary to close the sewer port with a closing material so that the filled curable injection material for lining does not leak into the sewer port. When the bottom of the manhole is configured to be flat, the sewer port may be closed using a simple plate-shaped closing member, but as shown in FIG.
When the water channel H (flow channel) is formed on the bottom face F of the manhole, it is necessary to prevent the curable injection material for lining from leaking into the water channel H. If the closing member has a mounting bottom for placing the lower end of the manhole repairing material to be positioned at the lowermost position inside the back plate, the back plate closes the upper half of the sewer pipe opening E. And placing the closing material such that the mounting bottom straddles the running water groove H,
The space between the placed manhole repairing material and the closing material is sealed to prevent liquid leakage into the water channel H. further,
A front plate portion is formed inside the mounting bottom portion to form a thin accommodation groove between the front plate portion and the back plate portion, and if the lower end of the manhole repairing material is accommodated in this accommodation groove, the sealing material is formed. A sufficient sealing structure can be easily formed between the manhole repairing material and the closing material by using the manhole repairing material, and the lowermost manhole repairing material can be stably arranged.
【００１３】マンホールの入口はマンホール内部より小
径に構成されている場合が多い。したがって、マンホー
ル補修材は入口を通過できるように変形させられてマン
ホール内に挿入され、そしてマンホール内で内壁面を覆
うように形が整えられることとなるが、マンホール補修
材はある程度の剛性を有することが好ましいので変形さ
せやすい構造を採用すべきである。単純な筒状体は小径
に変形させにくいし、単純なプレート体はロール状に巻
いて小径に変形させることがなかなか困難な場合が多
い。マンホール補修材として１箇所縦方向に切断した筒
状体を用いれば、この筒状体をオーバーラップ状態とな
るように変形させて簡単に縮径させることができるし、
またマンホール内で簡単にオーバーラップ状態を解除
し、拡径させて内壁面を覆うこともできる。In many cases, the entrance of the manhole has a smaller diameter than the inside of the manhole. Therefore, the manhole repair material is deformed so as to pass through the entrance, inserted into the manhole, and shaped to cover the inner wall surface in the manhole, but the manhole repair material has some rigidity. Therefore, a structure that can be easily deformed should be adopted. A simple cylindrical body is hardly deformed to a small diameter, and a simple plate body is often difficult to be wound into a roll and deformed to a small diameter. If a tubular body cut in one vertical direction is used as a manhole repair material, the tubular body can be deformed so as to be in an overlapped state and the diameter can be easily reduced,
In addition, the overlap state can be easily released in the manhole and the inner wall surface can be covered by expanding the diameter.
【００１４】ところで、マンホール内壁面の直壁部（円
筒内面状部）は比較的高く延びていて、この直壁部全体
を一つのマンホール補修材で覆うこととすれば、マンホ
ール補修材の背が高くなり取扱いが難しくなる。特に、
マンホール内で拡径させる場合に問題があり、背が高い
とマンホール補修材全体を一度に上から下まで均一に拡
径することが難しいので、例えば、まずマンホール補修
材の上側を拡径して保持し、次ぎに下側を拡径して保持
するといった手法が採用される。しかしながら、背の高
いマンホール補修材を部分的に順次拡径していくとマン
ホール補修材にねじれやうねりが生じやすく、ねじれや
うねりが生じないようにするためにはきわめて慎重な拡
径作業が必要となる。マンホール内壁面の直壁部全体を
複数個のマンホール補修材を積み重ねることにより覆う
こととすれば、背の低い、すなわち短いマンホール補修
材を取り扱うこととなるので、一度に上から下まで均一
に拡径できる場合もあり、また、順次拡径していかなけ
ればならない場合にも、簡単な作業によりねじれやうね
りが生じないようにマンホール補修材を拡径することが
できる。マンホール補修材の積み重ねは、下側のマンホ
ール補修材と上側のマンホール補修材とを嵌め込むこと
によって行われる。嵌め込み手段を用いることにより、
簡単に、かつ安定して、しかも密封的にマンホール補修
材を積み重ねることができるが、さらに下側のマンホー
ル補修材の上端部内側又は上側のマンホール補修材の下
端部内側を大径に形成してこれらのマンホール補修材を
嵌め込むことにより、嵌め込み箇所内側に段差が生じな
いようにすることができる。マンホール内でマンホール
補修材を拡径したときには、切断箇所の周方向両端部が
重なっていることが密封状態を確保する上で好ましい
が、さらに切断箇所の一端部を内径が大径となるように
形成すれば、切断箇所の内側に段差が生じないようにす
ることができる。なお、マンホール補修材はマンホール
内壁面に対応する形状に形成されるのが普通であり、マ
ンホール内壁面が角を有する場合にはマンホール補修材
も角を有する形状に形成され、例えば、断面形状が円形
ではなく四角形の筒状体に形成されることもある。By the way, the straight wall portion (the cylindrical inner surface portion) of the inner wall surface of the manhole extends relatively high, and if the entire straight wall portion is covered with one manhole repairing material, the back of the manhole repairing material becomes longer. High and difficult to handle. Especially,
There is a problem when expanding inside the manhole, and if it is tall, it is difficult to expand the whole manhole repair material at once from top to bottom, so for example, first expand the upper side of the manhole repair material A method is employed in which the lower side is held and then the lower side is expanded and held. However, if the tall manhole repair material is partially expanded in order, the manhole repair material is likely to be twisted and undulated, and extremely careful expansion work is required to prevent twisting and undulation. Becomes If the entire straight wall of the inner wall of the manhole is to be covered by stacking a plurality of manhole repair materials, it is necessary to handle short, short manhole repair materials. In some cases, the diameter of the manhole repairing material can be increased by a simple operation so that twisting and undulation do not occur even when the diameter must be increased in some cases. Stacking of the manhole repair material is performed by fitting the lower manhole repair material and the upper manhole repair material. By using the fitting means,
The manhole repair material can be stacked easily, stably, and hermetically, but the inside of the upper end of the lower manhole repair material or the inside of the lower end of the upper manhole repair material has a large diameter. By fitting these manhole repair materials, it is possible to prevent a step from being formed inside the fitting location. When expanding the manhole repair material in the manhole, it is preferable to secure the sealing state at both ends in the circumferential direction of the cut portion, but it is preferable that the inner diameter of the one end portion of the cut portion is large. If it is formed, a step can be prevented from occurring inside the cut portion. In addition, the manhole repair material is usually formed in a shape corresponding to the inner wall surface of the manhole, and when the inner wall surface of the manhole has a corner, the repair material for the manhole is also formed in a shape having a corner, for example, the sectional shape is It may be formed not in a circular shape but in a rectangular cylindrical shape.
【００１５】また、マンホール内壁面の上側部は入口に
向かって縮径する截頭円錐形状（上端部分は円筒形状に
形成されている場合が多い）に形成されているのが普通
である。マンホールの内壁面を全体的にライニングする
場合には、上側部（斜壁部）を覆う截頭円錐状の筒状マ
ンホール補修材を用いなければならないが、截頭円錐状
のマンホール補修材と、直壁部を覆う円筒状のマンホー
ル補修材とを一体的に形成すると、截頭円錐状部と円筒
状部とでは円滑にオーバーラップさせる変形態様が異な
るためにオーバーラップさせて縮径させることがなかな
か困難となってしまう。そこで、マンホール内壁面の斜
壁部のみを覆うための、縦方向に１箇所切断されたプラ
スチック製の薄肉の筒状マンホール補修材を準備し、こ
のマンホール補修材を直壁部を覆うマンホール補修材に
嵌め込み積み重ねることとなる。斜壁部用のマンホール
補修材が下端部に、オーバーラップに支障がない程度の
短い円筒状部を有している場合には、この円筒状部を直
壁部用のマンホール補修材の上端部、好ましくは大径に
形成された上端部内側に嵌め込む。The upper part of the inner wall of the manhole is usually formed in a truncated conical shape whose diameter is reduced toward the entrance (the upper end part is often formed in a cylindrical shape). When the entire inner wall surface of the manhole is lined, a frusto-conical tubular manhole repair material that covers the upper part (slope wall portion) must be used. When the cylindrical manhole repair material covering the straight wall portion is integrally formed, the frusto-conical portion and the cylindrical portion have different deformation modes for smoothly overlapping. It will be very difficult. In order to cover only the inclined wall of the inner wall of the manhole, a thin cylindrical manhole repair material made of plastic cut at one point in the longitudinal direction is prepared, and the manhole repair material covering the straight wall portion is provided. To be stacked. When the manhole repair material for the inclined wall portion has a short cylindrical portion at the lower end portion that does not hinder the overlap, this cylindrical portion is connected to the upper end portion of the manhole repair material for the straight wall portion. Preferably, it is fitted inside the upper end formed with a large diameter.
【００１６】マンホール補修材とマンホール内壁面との
隙間は狭いので、慎重に充填作業を行っても未充填部分
が生じるおそれがある。マンホール補修材がライニング
用硬化性注入材の充填状態を目視することができるよう
な透明体又は半透明体であれば、未充填部分が生じない
ように監視しながら効率的に充填作業を遂行することが
でき、また、複数回に分けてライニング用硬化性注入材
を充填する場合には、各充填段階で所定の高さまで正確
に充填することができる。Since the gap between the manhole repair material and the inner wall surface of the manhole is narrow, there is a possibility that an unfilled portion may occur even if the filling operation is performed carefully. If the manhole repairing material is a transparent or translucent body in which the filling state of the lining curable injecting material can be visually observed, the filling operation is efficiently performed while monitoring so that an unfilled portion does not occur. In the case where the curable injectable material for lining is filled in a plurality of times, it can be accurately filled to a predetermined height in each filling step.
【００１７】マンホール補修材を拡径させ、拡径状態を
保持する手段としては、手作業によってマンホール補修
材を押し拡げ、切断箇所を粘着テープで固定するといっ
たことが考えられるが、慎重な作業が必要となり、ま
た、粘着テープがライニング用硬化性注入材の液圧に耐
えられない事態も生じ得る。そこで、一箇所切断されて
切断位置の周方向両端部が重ね合わされた金属製又はプ
ラスチック製のリング体をマンホール補修材の内側に挿
入し、ストッパの操作により重なり幅を小さくしてリン
グ体を大径に拡径させ、マンホール補修材の内面を押圧
すれば、作業が簡単であり、かつ強固に拡径状態を保持
することができる。As means for expanding the manhole repair material and maintaining the expanded state, it is conceivable to manually expand the manhole repair material and fix the cut portion with adhesive tape, but careful work is required. In some cases, the pressure-sensitive adhesive tape may not be able to withstand the hydraulic pressure of the curable injection material for lining. Therefore, a metal or plastic ring body that has been cut at one location and the circumferential ends of the cutting position are overlapped is inserted inside the manhole repair material, and the overlap width is reduced by operating the stopper to increase the ring body. If the diameter is increased to the diameter and the inner surface of the manhole repair material is pressed, the operation is simple and the expanded state can be firmly maintained.
【００１８】[0018]
【実施例】以下、本発明の実施例を図面を参照して説明
する。Embodiments of the present invention will be described below with reference to the drawings.
【００１９】図１は本発明に係るマンホール補修材及び
閉塞材の斜視図である。FIG. 1 is a perspective view of a manhole repairing material and a closing material according to the present invention.
【００２０】プラスチック製の円筒状体であり、約１．
５ｍｍの厚さを有するマンホール補修材１，３は、積み
重ねられてマンホール内壁面Ａの直壁部Ｂを覆うもので
あり（図２参照）、上端部分に円筒状部分４を備えた截
頭円錐状部５及び下端部の円筒状部７とから形成され、
やはり約１．５ｍｍの厚さを有するプラスチック製のマ
ンホール補修材９は、マンホール補修材３上に積まれて
マンホール内壁面Ａの斜壁部Ｃを覆うものである（図２
参照）。マンホール補修材１，３，９のそれぞれは縦方
向に１箇所切断されていて、それぞれの切断箇所１１，
１３，１５の両端部１７ａ・１７ｂ，１９ａ・１９ｂ，
２１ａ・２１ｂは重なった状態となっている（図はマン
ホール内壁面Ａに押し付けた状態を示す）。切断箇所１
１，１３，１５の外側端部１７ｂ，１９ｂ，２１ｂ（一
端部）は、周方向の幅約１００ｍｍにわたって外方向に
膨らむように形成されているので、外側端部１７ｂ，１
９ｂ，２１ｂの内径は内側端部１７ａ，１９ａ，２１ａ
（他端部）を収めるように大径に形成され、したがって
切断箇所１１，１３，１５の内側には重なりによる段差
は生じていない。重なり幅は通常８０ｍｍ乃至１００ｍ
ｍであるが、マンホール内壁面Ａの腐食が激しい場合に
は、マンホール補修材１，３，９がより大きく拡径され
るので、重なり幅は３０ｍｍ程度になることもある。It is a cylindrical body made of plastic.
The manhole repair materials 1 and 3 having a thickness of 5 mm are stacked to cover the straight wall portion B of the inner wall surface A of the manhole (see FIG. 2), and are truncated cones having a cylindrical portion 4 at an upper end portion. And a cylindrical portion 7 at the lower end portion.
The plastic manhole repair material 9 also having a thickness of about 1.5 mm is piled on the manhole repair material 3 and covers the inclined wall portion C of the inner wall surface A of the manhole (FIG. 2).
reference). Each of the manhole repair materials 1, 3, and 9 is cut at one location in the longitudinal direction, and the respective cut locations 11,
13, 15 both ends 17a and 17b, 19a and 19b,
21a and 21b are in an overlapping state (the figure shows a state pressed against the inner wall surface A of the manhole). Cutting point 1
The outer end portions 17b, 19b, 21b (one end portions) of 1, 13, 15 are formed so as to swell outwardly over a circumferential width of about 100 mm.
9b and 21b have inner ends 17a, 19a and 21a, respectively.
(The other end) is formed to have a large diameter so as to be accommodated therein. Therefore, no step is formed inside the cut portions 11, 13, and 15 due to overlap. Overlap width is usually 80mm-100m
However, when the corrosion of the inner wall surface A of the manhole is severe, the diameter of the manhole repair materials 1, 3, and 9 is increased, and the overlap width may be about 30 mm.
【００２１】マンホール補修材１，３の上端部２３，２
５は外方向に拡がるように構成されているので（外方向
に拡がるように構成されている上端部２３，２５の高さ
は約１００ｍｍである）、上端部２３，２５の内径は、
マンホール補修材３の下端部２７、マンホール補修材９
の円筒状部７（下端部）を収めるように大径に形成され
ていて、したがって積み重ね箇所（嵌め込み箇所）の内
側には重なりによる段差は生じない。マンホール補修材
１，３の上端部２３，２５にはまた、マンホール補修材
３，９の外側端部１９ｂ，２１ｂを収容するための外側
への膨らみ２９，３１が形成されている。Upper end portions 23, 2 of manhole repair materials 1, 3
5 is configured to expand outward (the height of the upper ends 23 and 25 configured to expand outward is about 100 mm), so that the inner diameter of the upper ends 23 and 25 is
Lower end 27 of manhole repair material 3, manhole repair material 9
Is formed to have a large diameter so as to accommodate the cylindrical portion 7 (lower end portion), so that a step due to overlapping does not occur inside the stacked portion (fitting portion). Outer bulges 29, 31 for accommodating the outer ends 19b, 21b of the manhole repair materials 3, 9 are also formed at the upper end portions 23, 25 of the manhole repair materials 1, 3.
【００２２】マンホール補修材１，３，９の外周面に
は、外側に膨らませることにより内側が凹状となった多
数の小さな突起状の隙間形成用リブ３３，３５が設けら
れていて、マンホール補修材３，９の下端部２７，７に
設けられたリブ３３には、積み重ね用のフック３７が一
体的に形成されている。リブ３３の外側への突出量（高
さ）は約６ｍｍであり、リブ３５の外側への突出量は約
３ｍｍであるが、切断箇所１１，１３，１５の外側端部
１７ｂ，１９ｂ，２１ｂ上に設けられたリブ３３の外側
への突出量は約３ｍｍとすることが好ましい。マンホー
ル内壁面Ａとマンホール補修材１，３，９との隙間は２
ｍｍ以上１０ｍｍ以下であるのが効果的である。なぜな
らば、隙間が２ｍｍ未満であるとライニング用硬化性注
入材を充填しにくく、空気留まりが発生したり、注入材
が下端まで行き届かないおそれもあるからであり、逆に
１０ｍｍを超えると不必要にライニング用硬化性注入材
を使用することとなり、また注入材の硬化にともなう収
縮程度が大きすぎてマンホール補修材１，３，９にうね
りが生じるおそれもあるからである。したがって、リブ
３３の外側への突出量は２ｍｍ以上１０ｍｍ以下の範囲
で適当に選択することができる。なお、内面の平滑性を
重視する場合にはリブ３３、３５の内側凹部を硬化性樹
脂などで埋めることもある。さらに、小さな突起状のリ
ブに代えてマンホール補修材１，３，９の上端から下端
まで、又は下端の手前まで延びる筋状のリブを周方向に
等間隔で複数個設ける場合もある。また、図中３９，４
１，４３は吊り下げ孔である。On the outer peripheral surfaces of the manhole repair materials 1, 3, and 9, there are provided a large number of small projection-shaped gap forming ribs 33 and 35 whose insides are concave by expanding outward. A hook 33 for stacking is integrally formed with the rib 33 provided on the lower end portions 27 and 7 of the members 3 and 9. The amount of protrusion (height) of the rib 33 to the outside is about 6 mm, and the amount of protrusion of the rib 35 to the outside is about 3 mm, but the outer ends 17b, 19b, and 21b of the cut portions 11, 13, and 15 are provided. It is preferable that the amount of protrusion of the rib 33 provided on the outside be set to about 3 mm. The gap between the manhole inner wall surface A and the manhole repair materials 1, 3, 9 is 2
It is effective that the thickness is not less than 10 mm and not more than 10 mm. This is because if the gap is less than 2 mm, it is difficult to fill the curable injectable material for lining, and there is a possibility that air may be trapped or the injectable material may not reach the lower end. This is because a curable injection material for lining is used as needed, and the degree of shrinkage due to the hardening of the injection material is too large, and the manhole repair materials 1, 3, and 9 may undulate. Therefore, the amount of protrusion of the rib 33 to the outside can be appropriately selected within a range of 2 mm or more and 10 mm or less. When importance is placed on the smoothness of the inner surface, the concave portions inside the ribs 33 and 35 may be filled with a curable resin or the like. Further, a plurality of streaky ribs extending from the upper end to the lower end of the manhole repairing materials 1, 3, 9 or just before the lower end may be provided at equal intervals in the circumferential direction instead of the small protruding ribs. 39, 4 in the figure
1, 43 are suspension holes.
【００２３】マンホール補修材１，３を形成するには、
円柱外面を有する金型に繊維強化不飽和ポリエステルを
ハンドレイアップ法により成形し、型抜きを行なった後
に縦方向に１箇所切断する。また、マンホール補修材９
を形成するには、上端部分に円柱外面を有する截頭円錐
外面の下側に円柱外面を備えた金型に繊維強化不飽和ポ
リエステルをハンドレイアップ法により成形し、型抜き
を行なった後に縦方向に１箇所切断する。これらの金型
の外面は補修すべきマンホール内壁面Ａと対応するよう
に形成されている。なお、切断箇所１１，１３，１５は
成形時に形成してもよい。そして、マンホール補修材
１，３，９はいずれも透明体である。To form the manhole repair materials 1 and 3,
A fiber reinforced unsaturated polyester is molded by a hand lay-up method in a mold having a cylindrical outer surface, and after the mold is cut, one section is cut in a longitudinal direction. In addition, manhole repair material 9
Is formed by molding a fiber-reinforced unsaturated polyester by a hand lay-up method in a mold having a cylindrical outer surface below a truncated conical outer surface having a cylindrical outer surface at an upper end portion, and after performing a die-cutting, Cut in one direction. The outer surfaces of these dies are formed so as to correspond to the inner wall surface A of the manhole to be repaired. Note that the cut portions 11, 13, and 15 may be formed at the time of molding. The manhole repair materials 1, 3, and 9 are all transparent bodies.
【００２４】マンホール補修材１，３，９の成形材料と
しては、不飽和ポリエステルの他にポリエチレン、ポリ
プロピレン、塩化ビニル、ポリアミド等の熱可塑性プラ
スチックや、アクリル、エポキシ等の熱硬化性プラスチ
ックを用いることもできる。いずれの材料を用いる場合
にも、マンホール補修材の曲げ弾性率は１００ｋｇ／ｍ
ｍ2 以上１５００ｋｇ／ｍｍ2 以下であることが好まし
い。マンホール補修材の曲げ弾性率が１００ｋｇ／ｍｍ
2 未満では自重及びライニング用硬化性注入材の液圧に
より内側に大きく湾曲するおそれがあり、またマンホー
ル内壁面Ａの凹凸に応じてうねる可能性もある。逆に曲
げ弾性率が１５００ｋｇ／ｍｍ2 を越えると挿入時に変
形させて縮径させにくくなる。As the molding material for the manhole repair materials 1, 3, and 9, besides unsaturated polyester, use is made of thermoplastic plastics such as polyethylene, polypropylene, vinyl chloride and polyamide, and thermosetting plastics such as acrylic and epoxy. Can also. Regardless of which material is used, the flexural modulus of the manhole repair material is 100 kg / m.
It is preferable that it is not less than m 2 and not more than 1500 kg / mm 2 . Flexural modulus of repair of manhole repair material is 100kg / mm
If it is less than 2, there is a possibility that it will be largely bent inward due to its own weight and the liquid pressure of the curable injection material for lining, and there is also a possibility that it will undulate according to the unevenness of the inner wall surface A of the manhole. Conversely, if the flexural modulus exceeds 1500 kg / mm 2 , it becomes difficult to reduce the diameter due to deformation during insertion.
【００２５】プラスチック製の閉塞材４５は、下水管口
Ｅ（図２参照）部分のマンホール内壁面Ａに対応するよ
うに湾曲する背板部４７と、この背板部４７の下端から
内側に延びる載置用底部４９と、この載置用底部４９の
内側から上方に延び、背板部４７と同心的に湾曲する前
板部５１と、から構成され、背板部４７と前板部５１と
の間には、約５ｍｍの幅を有し、マンホール補修材１の
下端５２を収容するための収容溝５３が構成されてい
る。The plastic closing member 45 is curved so as to correspond to the inner wall surface A of the manhole at the sewage pipe opening E (see FIG. 2), and extends inward from the lower end of the back plate 47. A bottom plate 49 for mounting, and a front plate portion 51 extending upward from the inside of the mounting bottom portion 49 and curved concentrically with the back plate portion 47. Between them, an accommodation groove 53 having a width of about 5 mm and accommodating the lower end 52 of the manhole repair material 1 is formed.
【００２６】図２は閉塞材４５の配置状態を示す図、図
３は閉塞材４５部分の詳細を示す図である。FIG. 2 is a view showing an arrangement state of the closing member 45, and FIG. 3 is a view showing details of the closing member 45 portion.
【００２７】マンホール内壁面Ａは高圧水を吹き付けら
れて洗浄されているが、汚れが激しい場合には回転ブラ
シによる洗浄も行われる。次ぎに、ステップＤが切断さ
れ、両側の下水管口Ｅ位置に閉塞材４５が配置されて閉
塞工程が行われる。閉塞材４５は、背板部４７が下水管
口Ｅの上半分を塞ぎ、載置用底部４９が流水溝Ｈを跨ぐ
ようにマンホール底面Ｆ上に配置されるが、背板部４７
は下水管口Ｅを密閉して塞ぐように、背面の曲率がマン
ホール内壁面Ａの曲率と等しくなるように、かつ高さが
下水管口Ｅの半径より５０ｍｍ乃至１００ｍｍ高くな
り、幅が下水管口Ｅの直径より１００ｍｍ乃至２００ｍ
ｍ大きくなるように形成されていて、この背板部４７と
マンホール内壁面Ａとの間はシール材により密封され
る。シール材としては水分の存在下でも硬化するもの、
例えば水中硬化エポキシ樹脂や急結モルタルを用いるこ
とが好ましく、複数のシール材を用いる場合にも、少な
くとも一つのシール材には水中硬化型のものを使用すべ
きである。ここでは、図３に示すように下水管口Ｅ周辺
のマンホール内壁面Ａと、閉塞材４５の背板部４７背面
とにそれぞれ水中硬化エポキシ樹脂５５を塗布してか
ら、背板部４７背面をマンホール内壁面Ａに押し付ける
ようにして閉塞材４５を配置する。そして、背板部４７
の周縁に２液硬化型シリコーン樹脂５７を塗布して密封
機能を増加させる。なお、閉塞材４５の背板部４７を下
水管口Ｅの半径より５０ｍｍ乃至１００ｍｍ大きい半径
を有する半円板に構成してもよい。The inner wall surface A of the manhole is cleaned by spraying high-pressure water. However, when the surface is heavily soiled, cleaning is performed by a rotating brush. Next, the step D is cut, and the closing material 45 is arranged at the positions of the sewer ports E on both sides to perform the closing process. The closing member 45 is disposed on the manhole bottom surface F such that the back plate portion 47 covers the upper half of the sewer pipe opening E and the mounting bottom portion 49 straddles the flowing water groove H.
Is to close and close the sewer opening E, so that the curvature of the back surface is equal to the curvature of the inner wall surface A of the manhole, the height is 50 mm to 100 mm higher than the radius of the sewer opening E, and the width is 100mm to 200m from the diameter of mouth E
The space between the back plate portion 47 and the inner wall surface A of the manhole is sealed by a sealing material. A material that cures even in the presence of moisture as a sealing material,
For example, it is preferable to use an underwater-cured epoxy resin or a quick-setting mortar. Even when a plurality of sealing materials are used, at least one of the sealing materials should be an underwater-curing type. Here, as shown in FIG. 3, the underwater curing epoxy resin 55 is applied to the inner wall surface A of the manhole around the sewer pipe opening E and the back surface of the back plate portion 47 of the closing member 45, respectively. The closing member 45 is arranged so as to be pressed against the inner wall surface A of the manhole. And the backboard part 47
A two-part curable silicone resin 57 is applied to the periphery of the to increase the sealing function. The back plate portion 47 of the closing member 45 may be configured as a semi-circular plate having a radius larger by 50 mm to 100 mm than the radius of the sewer pipe opening E.
【００２８】図４はマンホール補修材１をマンホール内
に配置した状態を示す図、図５はマンホール補修材１を
マンホール内壁面Ａに押し付けた状態を示す図である。FIG. 4 is a view showing a state in which the manhole repair material 1 is arranged in the manhole, and FIG. 5 is a view showing a state in which the manhole repair material 1 is pressed against the inner wall surface A of the manhole.
【００２９】マンホール補修材１は曲げ弾性率が約８０
０ｋｇ／ｍｍ2 であり、マンホール底面Ｆが傾斜してい
る場合には下端５２がこのマンホール底面Ｆの傾斜に対
応するように形成される。そして、例えば紐などで縛る
ことにより図１の仮想線で示すような態様でオーバーラ
ップ状態となるように縮径され、マンホールの入口Ｇか
ら挿入され、積み重ね工程が開始される。挿入作業は、
マンホール補修材１の吊り下げ孔３９に、吊り下げ紐５
９を接続してこのマンホール補修材１を下降させること
により行われる（図２も参照）。マンホール内に挿入さ
れたマンホール補修材１はオーバーラップ状態を解除さ
れ、下端５２が閉塞材４５の収容溝５３内に収まるよう
に配置される。The manhole repair material 1 has a flexural modulus of about 80.
It was 0 kg / mm 2, when the manhole bottom F is inclined at the lower end 52 is formed to correspond to the inclination of the manhole bottom F. Then, for example, by being tied with a string or the like, the diameter is reduced so as to be in an overlapped state in the manner shown by the imaginary line in FIG. 1, inserted into the manhole entrance G, and the stacking process is started. Insertion work
In the hanging hole 39 of the manhole repair material 1, the hanging string 5
9 is connected to lower the manhole repair material 1 (see also FIG. 2). The manhole repairing material 1 inserted into the manhole is released from the overlapped state, and the lower end 52 is arranged so as to fit in the accommodation groove 53 of the closing member 45.
【００３０】マンホール補修材１を配置した後に図６に
示す拡径具６１をマンホール補修材１内に挿入し、拡径
工程を行う（図６は拡径具６１の斜視図）。拡径具６１
は、一箇所切断されたばね鋼製のリング体６３の周方向
一端部６４に、ピニオン（図示せず）を有するストッパ
６５を設け、内側にラック６７が形成されている周方向
他端側６８をこのストッパ６５に通してピニオンと噛み
合わせたもので、ストッパ６５の調整部６９の六角孔に
六角棒状具（図示せず）を嵌め込んで操作し、ピニオン
を回転させることにより一端部６４と他端側６８との重
なり幅を調整してリング体６３の径を変化させることの
できるものである。リング体６３の内側には吊り下げリ
ング７１が取り付けられている。挿入作業は、吊り下げ
ワイヤ７３に取り付けられた複数個（３個）のターンバ
クル７５から延びる吊り下げ紐７７を、吊り下げリング
７１に接続して拡径具６１をマンホール補修材１内に下
降させることにより行われる（図４）。マンホール補修
材１内に挿入された拡径具６１は吊り下げられた状態で
拡径され、図５に示すようにマンホール補修材１のリブ
３３，３５（図１も参照）がマンホール内壁面Ａの直壁
部Ｂに押し付けられるまで内面を押圧してマンホール補
修材１を拡径させる。拡径具６１が水平状態で吊り下げ
られていない場合には、ターンバクル７５を操作して拡
径具６１を水平状態に調整する。なお、ラック６７に代
えてチェーンを用い、ストッパ６５内にこのチェーンと
噛み合うスプロケットを設けてもよい。After the manhole repair material 1 has been arranged, the diameter expanding tool 61 shown in FIG. 6 is inserted into the manhole repair material 1 to perform a diameter expanding step (FIG. 6 is a perspective view of the diameter expanding tool 61). Expander 61
A stopper 65 having a pinion (not shown) is provided at one circumferential end 64 of a spring steel ring body 63 cut at one location, and a circumferential other end side 68 in which a rack 67 is formed inside is provided. The stopper 65 is engaged with the pinion by inserting a hexagonal bar (not shown) into a hexagonal hole of the adjusting portion 69 of the stopper 65 and operating the pinion. The diameter of the ring body 63 can be changed by adjusting the overlapping width with the end side 68. A suspension ring 71 is mounted inside the ring body 63. In the insertion operation, the suspension cords 77 extending from a plurality (three) of turnbuckles 75 attached to the suspension wires 73 are connected to the suspension rings 71 to lower the enlarged diameter tool 61 into the manhole repair material 1. (FIG. 4). The diameter expanding tool 61 inserted into the manhole repairing material 1 is expanded in a suspended state, and the ribs 33 and 35 (see also FIG. 1) of the manhole repairing material 1 as shown in FIG. The inner surface is pressed until the manhole repairing material 1 is expanded until the manhole repair material 1 is pressed against the straight wall portion B. When the diameter increasing tool 61 is not suspended in a horizontal state, the turn balloon 75 is operated to adjust the diameter expanding tool 61 to a horizontal state. Note that a chain may be used instead of the rack 67, and a sprocket that meshes with the chain may be provided in the stopper 65.
【００３１】次に、マンホール補修材１の切断箇所１１
を２液硬化型シリコーン樹脂７９でシールするととも
に、図７に詳細を示すように、マンホール補修材１の下
端部と閉塞材４５の前板部５１との間も２液硬化型シリ
コーン樹脂８１でシールする（図７はマンホール補修材
１の下端部と閉塞材４５との密封状態を示す図）。ま
た、マンホール補修材１の下端部とマンホール底面Ｆと
の間をシール材で密封するのであるが、このシール材も
水分の存在下でも硬化するものであることが好ましい。
ここでは、図８に詳細に示すように、マンホール補修材
１の下端５２とマンホール底面Ｆとの隙間に２液硬化型
シリコーン樹脂８３を充填してから水中硬化エポキシ樹
脂８５を塗布し、この水中硬化エポキシ樹脂８５の上か
ら急結モルタル８７を塗布している（図８はマンホール
補修材１の下端部とマンホール底面Ｆとの密封状態を示
す図）。そして、マンホール補修材１の外側の隙間８９
に少量の止水用硬化性樹脂９１を注入し、マンホール補
修材１の下側に大きな液圧に耐え得る十分な止水構造を
構成する。止水用硬化性樹脂９１はマンホール底面Ｆか
ら１０ｃｍ程度まで注入するのが適当である。このよう
にシール材８３，８５，８７及び止水用硬化性樹脂９１
でまず、下側の止水構造を十分なものとしておくと、ど
のような環境条件下でも次に充填するライニング用硬化
性注入材の動粘度を低くすることが可能である。ライニ
ング用硬化性注入材の動粘度が低ければ注入材がマンホ
ール内壁面Ａの腐食部分や亀裂のすみずみにまで入り込
んで硬化するので、より優れた補強・止水効果を期待で
きる。止水用硬化性樹脂９１としては、液状ウレタン樹
脂やポリブタジエン等の液状ゴムを用いることも可能で
あるが、常温硬化性のエポキシ樹脂、アクリル樹脂又は
不飽和ポリエステル樹脂を使用するのが適当であり、場
合によっては熱硬化性樹脂を用いることもある。ここで
は、２５℃における動粘度が１００ｃＳｔである常温硬
化性アクリル樹脂が用いられている。Next, the cut portion 11 of the manhole repair material 1
Is sealed with a two-component curable silicone resin 79, and between the lower end of the manhole repair material 1 and the front plate portion 51 of the closing member 45, as shown in detail in FIG. Sealing is performed (FIG. 7 is a diagram showing a sealed state between the lower end portion of the manhole repairing material 1 and the closing member 45). In addition, the space between the lower end of the manhole repair material 1 and the bottom surface F of the manhole is sealed with a seal material, and it is preferable that this seal material also cures in the presence of moisture.
Here, as shown in detail in FIG. 8, a two-part curable silicone resin 83 is filled in a gap between the lower end 52 of the manhole repair material 1 and the manhole bottom face F, and then an underwater-cured epoxy resin 85 is applied. A quick-setting mortar 87 is applied from above the cured epoxy resin 85 (FIG. 8 shows a sealed state between the lower end of the manhole repairing material 1 and the manhole bottom face F). And the gap 89 outside the manhole repair material 1
A small amount of the water-blocking hardening resin 91 is poured into the lower portion of the manhole repairing material 1 to form a sufficient water-blocking structure capable of withstanding a large hydraulic pressure. It is appropriate to inject the water-stopping curable resin 91 up to about 10 cm from the manhole bottom face F. Thus, the sealing materials 83, 85, 87 and the curable resin 91 for waterproofing are used.
First, if the water blocking structure on the lower side is made sufficient, the kinematic viscosity of the curable injection material for lining to be filled next can be reduced under any environmental conditions. If the kinematic viscosity of the curable injectable material for lining is low, the injectable material penetrates into the corroded portion of the inner wall A of the manhole or every corner of the crack and is hardened, so that a more excellent reinforcing and water stopping effect can be expected. As the water-stopping curable resin 91, a liquid rubber such as a liquid urethane resin or polybutadiene can be used, but it is preferable to use a cold-setting epoxy resin, an acrylic resin, or an unsaturated polyester resin. In some cases, a thermosetting resin may be used. Here, a room temperature curable acrylic resin having a kinematic viscosity at 25 ° C. of 100 cSt is used.
【００３２】図９は他のマンホール補修材３，９をマン
ホール内に配置し、マンホール内壁面Ａに押し付けた状
態を示す図である。FIG. 9 is a view showing a state in which other manhole repair materials 3, 9 are arranged in the manhole and pressed against the inner wall surface A of the manhole.
【００３３】マンホール補修材３，９はやはり曲げ弾性
率が約８００ｋｇ／ｍｍ2 であり、マンホール補修材１
と同様にオーバーラップ状態となるように縮径され、吊
り下げ孔４１，４３（図１参照）に接続された吊り下げ
紐５９（図２参照）に吊り下げられてマンホール内に挿
入される。マンホール内に挿入されたマンホール補修材
３はオーバーラップ状態を解除され、下端部２７がマン
ホール補修材１の上端部２３内に収まり、フック３７
（図１及び図１１参照）が上端部２３外側に引っかかる
ように積み重ね状態で配置される。続いてマンホール補
修材３内に拡径具６１を挿入し、マンホール補修材１の
場合と同様にしてリブ３３，３５（図１も参照）がマン
ホール内壁面Ａの直壁部Ｂに押し付けられるまでマンホ
ール補修材３を拡径させ、切断箇所１３（図１参照）及
び積み重ね箇所９５を２液硬化型シリコーン樹脂９７で
シールする。次ぎにマンホール補修材９がマンホール内
に挿入され、フック３７（図１及び図１１参照）がマン
ホール補修材３の上端部２５外側に引っかかり、円筒状
部７が上端部２５内に収まってから（積み重ね工程の完
了）、リブ３３がマンホール内壁面Ａの斜壁部Ｃ及び直
壁部Ｂ上端に押し付けられるまで拡径具６１によりマン
ホール補修材９を拡径させる（拡径工程の完了）。マン
ホール補修材９の拡径に用いられる拡径具６１は、外面
がマンホール補修材９に対応して傾斜していることが好
ましいが、図１０に示すように、円筒状部分４及び円筒
状部７に傾斜外面を有しない拡径具６１を配置してもよ
い（図１０はマンホール補修材９の他の押し付け態様を
示す図）。そして、切断箇所１５及び積み重ね箇所９９
を２液硬化型シリコーン樹脂１０１でシールしてマンホ
ール補修材１，３，９の設置を完了する。積み重ねにあ
たっては、切断箇所１３が膨らみ２９（図１参照）に、
切断箇所１５が膨らみ３１（図１参照）に一致するよう
に作業を遂行することとなる。なお、マンホール補修材
１の上端部２３内側及びマンホール補修材３の上端部２
５内側に、図１１に示すように、剥離紙１０３で覆われ
た粘着層１０５を設けておき、積み重ねの際にこの剥離
紙１０３を剥がし、マンホール補修材３の下端部２７及
びマンホール補修材９の円筒状部７をこの粘着層１０５
に押し付け接着することにより、安定した積み重ね状態
を確保するのが好ましい（図１１は積み重ね箇所９５，
９９に粘着層１０５を設けた場合を示す図）。さらに、
図１２に示すように、切断箇所１１，１３，１５の外側
端部１７ｂ，１９ｂ，２１ｂ内側にも剥離紙１０７で覆
われた粘着層１０９を設けておき、拡径の際に外側端部
１７ｂ，１９ｂ，２１ｂと内側端部１７ａ，１９ａ，２
１ａとを接着することにより、マンホール補修材１，
３，９の各々のすべての部分を均一な拡径状態に維持す
るのが適当である（図１２は切断箇所１１，１３，１５
に粘着層１０９を設けた場合を示す平面図）。そして、
ライニング用硬化性注入材が内側に漏れ出ることを確実
に防止するために、液漏れ防止用のスポンジ１１１，１
１３を上側及び外側に設けておくことが好ましい。マン
ホール補修材１の上端部２３、マンホール補修材３の上
端部２５及び外側端部１７ｂ，１９ｂ，２１ｂの外側へ
の膨らみは１ｍｍ乃至２ｍｍ程度でよいが（好ましくは
１．５ｍｍ）、粘着層１０５，１０９を設ける場合には
３ｍｍ程度とすることが適当である。The manhole repair materials 3 and 9 also have a flexural modulus of about 800 kg / mm 2.
In the same manner as described above, the diameter is reduced so as to be in an overlapped state, suspended by a suspension string 59 (see FIG. 2) connected to the suspension holes 41 and 43 (see FIG. 1), and inserted into the manhole. The manhole repair material 3 inserted into the manhole is released from the overlapped state, the lower end portion 27 fits in the upper end portion 23 of the manhole repair material 1, and the hook 37
1 and 11 are arranged in a stacked state so as to be hooked to the outside of the upper end portion 23. Subsequently, the expander 61 is inserted into the manhole repair material 3 until the ribs 33 and 35 (see also FIG. 1) are pressed against the straight wall portion B of the manhole inner wall surface A in the same manner as in the case of the manhole repair material 1. The manhole repairing material 3 is expanded in diameter, and the cut portion 13 (see FIG. 1) and the stacked portion 95 are sealed with a two-component curing type silicone resin 97. Next, the manhole repair material 9 is inserted into the manhole, the hook 37 (see FIGS. 1 and 11) is caught outside the upper end portion 25 of the manhole repair material 3, and the cylindrical portion 7 is settled in the upper end portion 25 ( The stacking process is completed), and the manhole repairing material 9 is expanded by the diameter expanding tool 61 until the rib 33 is pressed against the inclined wall portion C and the upper end of the straight wall portion B of the inner wall surface A of the manhole (completion of the expanding process). It is preferable that the outer surface of the diameter-enlargement tool 61 used for expanding the diameter of the manhole repairing material 9 is inclined corresponding to the manhole repairing material 9, but as shown in FIG. A diameter expanding tool 61 having no inclined outer surface may be arranged at 7 (FIG. 10 is a diagram showing another pressing manner of the manhole repairing material 9). Then, the cutting portion 15 and the stacking portion 99
Is sealed with a two-component curing type silicone resin 101 to complete the installation of the manhole repair materials 1, 3, and 9. In stacking, the cut portion 13 bulges 29 (see FIG. 1),
The work is performed so that the cut portion 15 matches the bulge 31 (see FIG. 1). The inside of the upper end 23 of the manhole repair material 1 and the upper end 2 of the manhole repair material 3
As shown in FIG. 11, an adhesive layer 105 covered with a release paper 103 is provided on the inside of the manhole repair material 3 and the lower end 27 of the manhole repair material 3 and the manhole repair material 9 are peeled off during stacking. Of the adhesive layer 105
It is preferable to secure a stable stacking state by pressing and adhering to the stacking member (FIG. 11 shows stacking points 95,
FIG. 99 shows a case in which an adhesive layer 105 is provided on the substrate 99). further,
As shown in FIG. 12, an adhesive layer 109 covered with a release paper 107 is also provided inside the outer ends 17b, 19b, and 21b of the cut portions 11, 13, and 15, and when the diameter is increased, the outer ends 17b are formed. , 19b, 21b and inner ends 17a, 19a, 2
1a, the manhole repair material 1,
It is appropriate to keep all the parts of each of the parts 3 and 9 in a uniform enlarged state (FIG. 12 shows the cut points 11, 13, and 15).
FIG. 2 is a plan view showing a case where an adhesive layer 109 is provided on the substrate. And
In order to reliably prevent the curable injection material for lining from leaking inward, the sponges 111 and 1 for preventing liquid leakage are used.
Preferably, 13 is provided on the upper side and the outer side. The outward swelling of the upper end 23 of the manhole repair material 1, the upper end 25 of the manhole repair material 3 and the outer ends 17b, 19b, 21b may be about 1 mm to 2 mm (preferably 1.5 mm). , 109 is suitably about 3 mm.
【００３４】図１３はライニング用硬化性注入材を注入
して充填した状態を示す図である。FIG. 13 is a view showing a state in which the lining curable filler is injected and filled.
【００３５】マンホール補修材１，３，９の設置完了後
に、ライニング用硬化性注入材１１５をマンホール補修
材１，３，９とマンホール内壁面Ａとの隙間８９全体に
上方から充填して硬化させ、ライニング工程を行う。ラ
イニング用硬化性樹脂１１５としては、液状ウレタン樹
脂やポリブタジエン等の液状ゴムを用いることも可能で
あるが、安価で、かつ接着性に優れた常温硬化性のエポ
キシ樹脂、アクリル樹脂又は不飽和ポリエステル樹脂を
使用するのが適当であり、場合によっては熱硬化性樹脂
を用いることもある。ここでは、２５℃における動粘度
が３００ｃＳｔである常温硬化性エポキシ樹脂が用いら
れている。ライニング用硬化性注入材１１５の動粘度は
２５℃において３０００ｃＳｔ以下であることが好まし
く、２５℃で１００ｃＳｔ乃至５００ｃＳｔが最適であ
る。２５℃における動粘度が３０００ｃＳｔを超えると
マンホール内壁面Ａとマンホール補修材１，３，９との
隙間８９にライニング用硬化性注入材１１５を充填しに
くく、空気留まりが発生したり、ライニング用硬化性注
入材１１５が下端まで行き届かないおそれもある。ただ
し、動粘度が３０００ｃＳｔ以下であっても大きい場合
には、環境条件によって空気留まりが発生するなどの可
能性が全くないとはいえない。したがって、ライニング
用硬化性注入材１１５の動粘度は小さい方が好ましい。After the installation of the manhole repair materials 1, 3, 9 is completed, the hardening injectable material 115 for lining is filled from above into the entire gap 89 between the manhole repair materials 1, 3, 9 and the inner wall surface A of the manhole and hardened. Lining process. As the lining curable resin 115, a liquid rubber such as liquid urethane resin or polybutadiene can be used, but it is inexpensive and has room-temperature-curable epoxy resin, acrylic resin, or unsaturated polyester resin excellent in adhesiveness. Is suitable, and in some cases, a thermosetting resin may be used. Here, a room temperature curable epoxy resin having a kinematic viscosity of 300 cSt at 25 ° C. is used. The kinematic viscosity of the lining curable injection material 115 is preferably 3000 cSt or less at 25 ° C., and most preferably 100 cSt to 500 cSt at 25 ° C. If the kinematic viscosity at 25 ° C. exceeds 3000 cSt, it is difficult to fill the gap 89 between the inner wall surface A of the manhole and the manhole repair materials 1, 3, and 9 with the hardening injection material 115 for lining, so that air retention occurs and hardening for lining occurs. There is a possibility that the sex injection material 115 may not reach the lower end. However, if the kinematic viscosity is 3000 cSt or less but large, it cannot be said that there is no possibility that air retention occurs due to environmental conditions. Therefore, it is preferable that the kinematic viscosity of the lining curable injection material 115 is small.
【００３６】通常の常温硬化性注入材の硬化時間は１乃
至６時間程度であるので、マンホール補修材１，３，９
をすべて設置してからライニング用硬化性注入材１１５
を一度に充填するのが補修時間を短縮する上で好ましい
が、複数回に分けて充填し、しかも前に充填したライニ
ング用硬化性注入材１１５が硬化又は半硬化してから次
ぎの充填を行うようにしてもよい。また、場合によって
は各マンホール補修材１，３，９を設置するたびにライ
ニング用硬化性注入材１１５を充填することも可能であ
る。The curing time of the ordinary cold-setting curable material is about 1 to 6 hours, so that the manhole repair materials 1, 3, 9
Is installed, and then the curable injection material 115 for lining is used.
Is preferably filled at once in order to shorten the repair time, but the filling is performed in a plurality of times, and the next filling is performed after the curable injection material 115 for lining previously filled is cured or semi-cured. You may do so. In some cases, each time the manhole repair materials 1, 3, and 9 are installed, the lining curable injection material 115 can be filled.
【００３７】図１４は補修作業の完了状態を示す図であ
る。FIG. 14 is a diagram showing a completed state of the repair work.
【００３８】ライニング用硬化性注入材１１５が硬化し
たら、拡径具６１を取り外し（図１３参照）、下水管口
Ｅ部分に孔１１７を穿けるとともに、ステップ（図示せ
ず）を新たに取り付ける。そして、孔１１７の切断面を
エポキシ樹脂等の硬化性樹脂で覆うなどの外観仕上げを
行って補修作業を完了する。ライニング用硬化性注入材
１１５は図１５に示すようにマンホール内壁面Ａの腐食
部分や亀裂に十分入り込んで硬化している（図１５はラ
イニング用硬化性注入材１１５の硬化状態を示す図）。
なお、マンホール補修材１，３，９を取り去る場合には
マンホール補修材１，３，９の外面に離型剤を塗布して
おけばよいが、マンホール補修材１，３，９がポリプロ
ピレン、ポリエチレン又はフッ素樹脂製等の離型性が良
好なものである場合には、あえて離型剤を塗布する必要
はない。また、下水管口Ｅの上半分がマンホール内壁面
Ａによって塞がれていて開口していない場合には、下水
管口Ｅ部分に孔を穿けないで補修作業を完了する。When the hardening material for lining 115 has hardened, the diameter expanding tool 61 is removed (see FIG. 13), a hole 117 is formed in the sewage pipe opening E, and a step (not shown) is newly attached. Then, the repair work is completed by performing appearance finishing such as covering the cut surface of the hole 117 with a curable resin such as an epoxy resin. As shown in FIG. 15, the lining curable injection material 115 has sufficiently penetrated the corroded portions and cracks of the inner wall surface A of the manhole and has been cured (FIG. 15 is a diagram showing the cured state of the lining curable injection material 115).
When removing the manhole repair materials 1, 3, and 9, a release agent may be applied to the outer surfaces of the manhole repair materials 1, 3, and 9; however, the manhole repair materials 1, 3, and 9 are made of polypropylene or polyethylene. Alternatively, when the release properties are good, such as those made of fluororesin, there is no need to dare to apply a release agent. When the upper half of the sewer pipe opening E is closed by the manhole inner wall surface A and is not open, the repair work is completed without making a hole in the sewer pipe opening E portion.
【００３９】[0039]
【発明の効果】以上説明したように、本発明のマンホー
ル補修方法を用いれば、マンホールの直壁部全体を複数
個のマンホール補修材を積み重ねることにより覆うの
で、各マンホール補修材を迅速に拡径処理してもマンホ
ール補修材にねじれやうねりが生じることがなく、した
がって、簡単に補修内面の仕上がり具合が良好な補修結
果を得ることができる。しかも、マンホール補修材の積
み重ねは嵌め込み手段を用いて行われるので、積み重ね
に手間がかかるということがなく、かつマンホール補修
材間の密封性を容易に確保できる。As described above, according to the manhole repair method of the present invention, the entire straight wall portion of the manhole is covered by stacking a plurality of manhole repair materials, so that each manhole repair material can be rapidly expanded in diameter. Even if the treatment is performed, the manhole repair material is not twisted or undulated, and therefore, a repair result in which the finish condition of the repair inner surface is favorable can be easily obtained. In addition, since the manhole repair materials are stacked by using the fitting means, no trouble is required for stacking, and the sealability between the manhole repair materials can be easily secured.
【００４０】また、本発明の閉塞材を用いれば、マンホ
ール底面に流水溝が形成されている場合にも、ライニン
グ用硬化性注入材の液漏れを効果的に阻止することが可
能となる。Further, by using the plugging material of the present invention, it is possible to effectively prevent the leakage of the curable injection material for lining even when a water channel is formed on the bottom surface of the manhole.
【００４１】さらに、本発明のマンホール補修材を用い
れば、積み重ねによってマンホール補修材内面に段差が
形成されるのを防ぐことができる。Further, the use of the manhole repairing material of the present invention can prevent a step from being formed on the inner surface of the manhole repairing material due to stacking.
【００４２】そして、本発明の拡径具を用いれば、マン
ホール補修材を簡単に拡径させることができ、しかも、
安定した拡径状態を保つことが可能となる。By using the expanding tool of the present invention, the manhole repairing material can be easily expanded in diameter.
It is possible to maintain a stable expanded state.
【図１】本発明に係るマンホール補修材及び閉塞材の斜
視図である。FIG. 1 is a perspective view of a manhole repair material and a closing material according to the present invention.
【図２】閉塞材の配置状態を示す図である。FIG. 2 is a view showing an arrangement state of a closing member.
【図３】閉塞材部分の詳細を示す図である。FIG. 3 is a diagram showing details of a closing member portion.
【図４】マンホール補修材をマンホール内に配置した状
態を示す図である。FIG. 4 is a view showing a state in which a manhole repairing material is arranged in a manhole.
【図５】マンホール補修材をマンホール内壁面に押し付
けた状態を示す図である。FIG. 5 is a diagram showing a state in which the manhole repairing material is pressed against the inner wall surface of the manhole.
【図６】拡径具の斜視図である。FIG. 6 is a perspective view of a diameter expanding device.
【図７】マンホール補修材の下端部と閉塞材との密封状
態を示す図である。FIG. 7 is a diagram showing a sealed state between the lower end portion of the manhole repair material and the closing material.
【図８】マンホール補修材の下端部とマンホール底面と
の密封状態を示す図である。FIG. 8 is a diagram showing a sealed state between the lower end of the manhole repair material and the bottom of the manhole.
【図９】他のマンホール補修材をマンホール内に配置
し、マンホール内壁面に押し付けた状態を示す図であ
る。FIG. 9 is a view showing a state in which another manhole repairing material is arranged in the manhole and pressed against the inner wall surface of the manhole.
【図１０】マンホール補修材の他の押し付け態様を示す
図である。FIG. 10 is a view showing another pressing manner of the manhole repair material.
【図１１】積み重ね箇所に粘着層を設けた場合を示す図
である。FIG. 11 is a diagram showing a case where an adhesive layer is provided at a stacking position.
【図１２】切断箇所に粘着層を設けた場合を示す平面図
である。FIG. 12 is a plan view showing a case where an adhesive layer is provided at a cut position.
【図１３】ライニング用硬化性注入材を注入して充填し
た状態を示す図である。FIG. 13 is a view showing a state where a curable filler for lining is injected and filled.
【図１４】補修作業の完了状態を示す図である。FIG. 14 is a diagram showing a completed state of the repair work.
【図１５】ライニング用硬化性注入材の硬化状態を示す
図である。FIG. 15 is a diagram illustrating a cured state of a curable injection material for lining.
【図１６】マンホール底面に流水溝が形成されている場
合を示す斜視図である。FIG. 16 is a perspective view showing a case where a running water groove is formed on the bottom of the manhole.
１，３，９ マンホール補修材 ５ 截頭円錐状部 ７ 円筒状部（マンホ
ール補修材の下端部） １１，１３，１５ 切断箇所 １７ａ，１９ａ，２１ａ 内側端部（他端
部） １７ｂ，１９ｂ，２１ｂ 外側端部（一端
部） ２３，２５ マンホール補修材
の上端部 ２７ マンホール補修材
の下端部 ３３，３５ リブ ４５ 閉塞材 ４７ 背板部 ４９ 載置用底部 ５１ 前板部 ５２ マンホール補修材
の下端 ５３ 収容溝 ６１ 拡径具 ６３ リング体 ６５ ストッパ １１５ ライニング用硬化
性注入材 Ａ マンホール内壁面 Ｂ 直壁部 Ｃ 斜壁部 Ｅ 下水管口 Ｈ 流水溝1,3,9 Manhole repair material 5 Truncated conical part 7 Cylindrical part (lower end of manhole repair material) 11,13,15 Cutting location 17a, 19a, 21a Inner end (other end) 17b, 19b, 21b Outer end (one end) 23, 25 Upper end of manhole repair material 27 Lower end of manhole repair material 33, 35 Rib 45 Closure 47 Back plate 49 Mounting bottom 51 Front plate 52 Lower end of manhole repair material 53 Housing groove 61 Enlarger 63 Ring body 65 Stopper 115 Curable injection material for lining A Manhole inner wall surface B Straight wall portion C Sloping wall portion E Sewage pipe opening H Flow groove
───────────────────────────────────────────────────── フロントページの続き (73)特許権者 000227124 日曹商事株式会社 東京都中央区日本橋本町３丁目３番６号 (72)発明者 夏堀 功 愛知県小牧市大字北外山字哥津3600番地 東海ゴム工業株式会社内 (72)発明者 宇田 信也 愛知県小牧市大字北外山字哥津3600番地 東海ゴム工業株式会社内 (72)発明者 水上 勇夫 愛知県小牧市大字北外山字下小管4203番 地の１ 東海化成工業株式会社内 (72)発明者 近藤 光由 愛知県小牧市大字北外山字下小管4203番 地の１ 東海化成工業株式会社内 (72)発明者 田野 豊 東京都中央区日本橋大伝馬町12番２号 日曹油化工業株式会社内 (72)発明者 中村 勝巳 東京都世田谷区上用賀１−７−３ 管清 工業株式会社内 (72)発明者 丹羽 久 東京都世田谷区上用賀１−７−３ 管清 工業株式会社内 (72)発明者 加藤 佳喜 東京都中央区日本橋本町三丁目３番６号 日曹商事株式会社内 (72)発明者 三浦 修司 東京都中央区日本橋本町三丁目３番６号 日曹商事株式会社内 (56)参考文献 特開 平７−127084（ＪＰ，Ａ) ────────────────────────────────────────────────── ─── Continued on the front page (73) Patent holder 000227124 Nisso Shoji Co., Ltd. 3-3-6 Nihonbashi Honcho, Chuo-ku, Tokyo (72) Inventor Isao Natsubori 3600 No. Gezu, Kita-gaiyama, Komaki City, Aichi Prefecture Inside Tokai Rubber Industries Co., Ltd. (72) Inventor Shinya Uda 3600, Gezu, Kita-gaiyama, Komaki-shi, Aichi Prefecture Inside Tokai Rubber Industries Co., Ltd. Ground No. 1 Tokai Kasei Kogyo Co., Ltd. (72) Inventor Mitsuyoshi Kondo Komaki City, Aichi Prefecture, Oita Kita-Gaiyama Character No. 4203 Small ground No. 1 Tokai Kasei Kogyo Co., Ltd. (72) Inventor Yutaka Tano 12-2 Odenmacho Nisso Yuka Kogyo Co., Ltd. (72) Inventor Katsumi Nakamura 1-7-3 Kamyoga, Setagaya-ku, Tokyo Hisashi Niwa 1-7-3 Kamyoga, Setagaya-ku, Tokyo Kansei Industry Co., Ltd. Shuji Miura 3-6-6 Nihonbashi Honmachi, Chuo-ku, Tokyo Nisso Shoji Co., Ltd. (56) References JP-A-7-127084 (JP, A)
Claims (13)
製の薄肉の筒状マンホール補修材を用いてマンホール内
をライニングし補修するマンホール補修方法であって、 マンホール内壁面の直壁部を覆うための複数個のマンホ
ール補修材、及び必要に応じて斜壁部を覆うためのマン
ホール補修材を準備する準備工程と、マンホール内の流
水路への液漏れを防止するために下水管口位置に閉塞材
を配置する閉塞工程と、前記マンホール補修材をオーバ
ーラップ状態となるように縮径させ、順次マンホール内
に挿入して嵌め込み積み重ねる積み重ね工程と、積み重
ね工程中又は積み重ね工程後に、前記マンホール補修材
を拡径させ、マンホール内壁面を隙間を有して覆う状態
に保持する拡径工程と、マンホール内壁面と前記マンホ
ール補修材との前記隙間に液状のライニング用硬化性注
入材を充填して硬化させるライニング工程と、を行うこ
とを特徴とするマンホール補修方法。1. A manhole repair method for lining and repairing the inside of a manhole using a plastic thin tubular manhole repair material cut at one point in a longitudinal direction, wherein the method covers a straight wall portion of an inner wall surface of the manhole. Preparation process for preparing a plurality of manhole repair materials and, if necessary, manhole repair materials for covering the slope wall portion, and closing at a sewer pipe mouth position to prevent leakage of liquid into a flowing water channel in the manhole. A closing step of disposing the material, a stacking step of reducing the diameter of the manhole repair material so as to be in an overlapped state, sequentially inserting the manhole repair material into the manhole and stacking the same, during or after the stacking step, the manhole repair material is removed. A diameter increasing step of expanding the diameter of the manhole and keeping the inner wall surface of the manhole covered with a gap; Manhole repair method which comprises carrying out the lining curing filled with a liquid lining curable grout into the gap, the.
修材の下端は、前記閉塞材上に載せられることを特徴と
する請求項１記載のマンホール補修方法。2. The manhole repair method according to claim 1, wherein a lower end of the manhole repair material to be positioned at the lowermost position is placed on the closing member.
て、最も下側に位置すべき前記マンホール補修材の下端
は、この収容溝に収められて前記閉塞材上に載せられる
ことを特徴とする請求項２記載のマンホール補修方法。3. A closing groove is formed in the closing member, and a lower end of the manhole repairing material, which is to be positioned at the lowermost position, is stored in the holding groove and placed on the closing member. The method for repairing manholes according to claim 2, wherein
の上端部及び上側に位置すべき前記マンホール補修材の
下端部の一方の内径は大径に形成されていて、前記マン
ホール補修材の積み重ねは、他方をこの一方の内側に嵌
め込むことにより行われることを特徴とする請求項１、
２又は３記載のマンホール補修方法。4. An inner diameter of one of an upper end portion of the manhole repair material to be located on the lower side and a lower end of the manhole repair material to be located on the upper side has a large diameter, and the manhole repair material is stacked. Is carried out by fitting the other into the inside of the other.
The method for repairing manholes according to 2 or 3.
向一端部は内径が大径となるように形成されていて、前
記マンホール補修材の拡径は、この一端部の内側に他端
部が重なるように行われることを特徴とする請求項１、
２、３又は４記載のマンホール補修方法。5. One end of the manhole repair material in the circumferential direction at a cutting position is formed so that an inner diameter becomes large, and the diameter of the manhole repair material is increased by setting the other end inside the one end. The method according to claim 1, wherein the steps are performed so as to overlap.
The method for repairing manholes according to 2, 3, or 4.
液漏れ防止用の閉塞材であって、 下水管口部分のマンホール内壁面に対応するように湾曲
する背板部と、この背板部から内側に延びる載置用底部
と、から構成されたことを特徴とする閉塞材。6. A closing member for preventing leakage of liquid into a water channel used in a method of repairing a manhole, wherein the backboard is curved so as to correspond to the inner wall surface of the manhole at a mouth of a sewer pipe. And a mounting bottom extending inward.
の間に細い収容溝を構成する前板部を形成したことを特
徴とする請求項６記載の閉塞材。7. The closing material according to claim 6, wherein a front plate portion forming a thin accommodating groove with the back plate portion is formed inside the placing bottom portion.
壁部を隙間を有して覆うマンホール補修材であって、 プラスチック製の薄肉の筒状体を縦方向に１箇所切断
し、この筒状体の上端部内側又は下端部内側を大径に形
成して構成したことを特徴とするマンホール補修材。8. A manhole repairing material for stacking a plurality of pieces and covering a straight wall portion of the inner wall surface of the manhole with a gap, wherein a thin cylindrical body made of plastic is cut at one position in a vertical direction, and A manhole repairing material characterized in that the inside of the upper end or the inside of the lower end of the body is formed to have a large diameter.
て覆うマンホール補修材であって、 截頭円錐状部と、この截頭円錐状部の下端に設けられた
円筒状部と、から形成されたプラスチック製の薄肉の筒
状体を、縦方向に一箇所切断して構成したことを特徴と
するマンホール補修材。9. A manhole repairing material that covers a slope of an inner wall surface of a manhole with a gap, comprising: a truncated conical portion; a cylindrical portion provided at a lower end of the truncated conical portion; A manhole repair material characterized in that a thin cylindrical body made of plastic formed from is cut at one location in the vertical direction.
さなリブが一体的に形成されていることを特徴とする請
求項８又は９記載のマンホール補修材。10. The manhole repair material according to claim 8, wherein a plurality of small ribs are integrally formed on an outer peripheral surface of the tubular body.
を、内径が大径となるように形成したことを特徴とする
請求項８、９又は１０記載のマンホール補修材。11. The manhole repairing material according to claim 8, wherein one end in the circumferential direction of the cut portion of the tubular body is formed to have a large inner diameter.
とを特徴とする請求項８、９、１０又は１１記載のマン
ホール補修材。12. The manhole repairing material according to claim 8, wherein said tubular body is transparent or translucent.
面を押圧してこのマンホール補修材を拡径させる拡径具
であって、 一箇所切断されて切断位置の両端部が重ね合わされたリ
ング体と、前記両端部の重なり幅を調整してこの両端部
を固定するストッパと、から構成されたことを特徴とす
る拡径具。13. A diameter expanding tool for expanding the diameter of a manhole repairing material by pressing an inner surface of the manhole repairing material in a manhole, wherein the ring body is cut at one position and both ends of a cutting position are overlapped with each other. A stopper for adjusting the overlapping width of the both ends and fixing the both ends.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7184852A JP2641713B2 (en) | 1995-06-27 | 1995-06-27 | Manhole repairing method, closing material, manhole repairing material and expanding tool |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP7184852A JP2641713B2 (en) | 1995-06-27 | 1995-06-27 | Manhole repairing method, closing material, manhole repairing material and expanding tool |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0913410A JPH0913410A (en) | 1997-01-14 |
| JP2641713B2 true JP2641713B2 (en) | 1997-08-20 |
Family
ID=16160441
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP7184852A Expired - Fee Related JP2641713B2 (en) | 1995-06-27 | 1995-06-27 | Manhole repairing method, closing material, manhole repairing material and expanding tool |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2641713B2 (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088715A (en) * | 2006-10-03 | 2008-04-17 | Ebata Kk | Concrete structure reconstructing method, concrete structure producing method, and corrosion resistant member for use in the methods |
| JP2009243082A (en) * | 2008-03-29 | 2009-10-22 | Tokai Rubber Ind Ltd | Manhole repair method |
| JP2009243083A (en) * | 2008-03-29 | 2009-10-22 | Tokai Rubber Ind Ltd | Manhole repair method |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP4515806B2 (en) * | 2004-04-22 | 2010-08-04 | 株式会社湘南合成樹脂製作所 | Rehabilitation of existing pipes |
| JP4956364B2 (en) * | 2007-10-15 | 2012-06-20 | シーアイ化成株式会社 | Manhole lining sheet, manhole lining structure, and manhole lining construction method |
| JP5302696B2 (en) * | 2008-07-11 | 2013-10-02 | 株式会社湘南合成樹脂製作所 | Manhole rehabilitation method |
| JP5274199B2 (en) * | 2008-10-23 | 2013-08-28 | 旭化成ホームズ株式会社 | Length adjusting connecting pipe |
| JP5922870B2 (en) * | 2011-01-25 | 2016-05-24 | 太陽インダストリー株式会社 | Manhole repair method |
-
1995
- 1995-06-27 JP JP7184852A patent/JP2641713B2/en not_active Expired - Fee Related
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2008088715A (en) * | 2006-10-03 | 2008-04-17 | Ebata Kk | Concrete structure reconstructing method, concrete structure producing method, and corrosion resistant member for use in the methods |
| JP2009243082A (en) * | 2008-03-29 | 2009-10-22 | Tokai Rubber Ind Ltd | Manhole repair method |
| JP2009243083A (en) * | 2008-03-29 | 2009-10-22 | Tokai Rubber Ind Ltd | Manhole repair method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0913410A (en) | 1997-01-14 |
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