JP2552593B2 - Method of repairing existing human hole in sewer - Google Patents
Method of repairing existing human hole in sewerInfo
- Publication number
- JP2552593B2 JP2552593B2 JP3220383A JP22038391A JP2552593B2 JP 2552593 B2 JP2552593 B2 JP 2552593B2 JP 3220383 A JP3220383 A JP 3220383A JP 22038391 A JP22038391 A JP 22038391A JP 2552593 B2 JP2552593 B2 JP 2552593B2
- Authority
- JP
- Japan
- Prior art keywords
- lining material
- existing human
- human hole
- wall
- hole
- 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
- 238000000034 method Methods 0.000 title claims description 13
- 239000000463 material Substances 0.000 claims description 89
- 230000002093 peripheral effect Effects 0.000 claims description 17
- 239000000945 filler Substances 0.000 claims description 16
- 239000011414 polymer cement Substances 0.000 claims description 13
- 229920000092 linear low density polyethylene Polymers 0.000 claims description 12
- 239000004707 linear low-density polyethylene Substances 0.000 claims description 12
- 229920003002 synthetic resin Polymers 0.000 claims description 12
- 239000000057 synthetic resin Substances 0.000 claims description 12
- 239000000470 constituent Substances 0.000 claims description 6
- 229920005989 resin Polymers 0.000 claims description 6
- 239000011347 resin Substances 0.000 claims description 6
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 claims description 6
- 238000010438 heat treatment Methods 0.000 claims description 5
- 238000003780 insertion Methods 0.000 claims description 4
- 230000037431 insertion Effects 0.000 claims description 4
- 230000000052 comparative effect Effects 0.000 description 7
- -1 polypropylene Polymers 0.000 description 5
- 239000004568 cement Substances 0.000 description 4
- 239000004698 Polyethylene Substances 0.000 description 3
- 229920000573 polyethylene Polymers 0.000 description 3
- 239000004800 polyvinyl chloride Substances 0.000 description 3
- 229920000915 polyvinyl chloride Polymers 0.000 description 3
- 238000001175 rotational moulding Methods 0.000 description 3
- 239000004743 Polypropylene Substances 0.000 description 2
- 229920001903 high density polyethylene Polymers 0.000 description 2
- 239000004700 high-density polyethylene Substances 0.000 description 2
- 239000008267 milk Substances 0.000 description 2
- 210000004080 milk Anatomy 0.000 description 2
- 235000013336 milk Nutrition 0.000 description 2
- 229920001155 polypropylene Polymers 0.000 description 2
- 239000010865 sewage Substances 0.000 description 2
- RWSOTUBLDIXVET-UHFFFAOYSA-N Dihydrogen sulfide Chemical compound S RWSOTUBLDIXVET-UHFFFAOYSA-N 0.000 description 1
- 239000004908 Emulsion polymer Substances 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000007797 corrosion Effects 0.000 description 1
- 238000005260 corrosion Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 239000000839 emulsion Substances 0.000 description 1
- 239000012530 fluid Substances 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 239000003673 groundwater Substances 0.000 description 1
- 229910000037 hydrogen sulfide Inorganic materials 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 229920001684 low density polyethylene Polymers 0.000 description 1
- 239000004702 low-density polyethylene Substances 0.000 description 1
- 238000004519 manufacturing process Methods 0.000 description 1
- 239000004014 plasticizer Substances 0.000 description 1
- 229920000642 polymer Polymers 0.000 description 1
- 102000004169 proteins and genes Human genes 0.000 description 1
- 108090000623 proteins and genes Proteins 0.000 description 1
- 238000011179 visual inspection 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】この発明は、下水道における既設
人孔の補修方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a method for repairing an existing human hole in sewers.
【０００２】[0002]
【従来の技術】従来、下水道における既設人孔（いわゆ
るマンホール）の内壁は、長い年月の経過による腐食、
周りからの外圧、あるいは流体中に含まれるタンパク質
の腐食で発生した硫化水素とコンクリート成分中のアル
カリ成分との反応で生じた膨脹性化合物等に起因して、
不測の亀裂や損傷を生じることがある。2. Description of the Related Art Conventionally, the inner wall of an existing manhole (so-called manhole) in the sewer has been corroded by the passage of a long time.
Due to the external pressure from the surroundings, or the expansive compound generated by the reaction between hydrogen sulfide generated by the corrosion of proteins contained in the fluid and the alkaline component in the concrete component,
This may cause unexpected cracks and damage.
【０００３】そして、これらの亀裂や損傷を生じると、
地下水等の浸入により、とくに雨天時には、下水道処理
場の処理能力を越える下水量が流入するおそれが出てく
る。しかしながら、例えば交通量の多い交差点内の地下
に設けられた人孔は、それ自体をやり替えるとなると、
道路の一部を長期間閉鎖する必要があり、交通渋滞が生
じるため、実際上、施工困難であった。[0003] When these cracks and damage occur,
Due to the infiltration of groundwater, etc., especially in rainy weather, the amount of sewage that exceeds the treatment capacity of the sewage treatment plant may flow in. However, for example, a manhole in the basement of an intersection with a lot of traffic will replace itself,
Since part of the road had to be closed for a long period of time and traffic congestion occurred, construction was difficult in practice.
【０００４】このため、既設人孔の補修には、近時、下
水道における既設人孔の内壁を覆う形状を有しかつ底壁
と上壁とを有する合成樹脂製の有底筒形ライニング材を
用いており、このライニング材の上壁には、スチーム導
入口と空気等排出口があけられていた。そして従来は、
まずこの有底筒形ライニング材を小さく折り畳んで、既
設人孔内に、これの上端開口部より挿入した後、導入口
より加熱スチームを導入して、ライニング材の構成樹脂
を軟化せしめ、ライニング材を有底筒形の原形に復元し
て、既設人孔の内面にほゞ沿わせるようにし、このライ
ニング材を冷却固化せしめた。ついで、ライニング材の
上壁を切断除去するとともに、ライニング材の底壁に、
既設人孔の底部の凹溝に対応する通水孔をあけた。そし
て最後に、既設人孔の周壁とライニング材の周壁との間
の間隙に、エマルジョン系ポリマーセメント・ペースト
（いわゆるセメントミルク）等の充填剤を流し込み、こ
れを硬化せしめて、有底筒形ライニング材を周壁内面に
固定し、これによって既設人孔の内壁を補修していた。Therefore, in order to repair the existing human hole, a bottomed cylindrical lining material made of synthetic resin having a shape covering the inner wall of the existing human hole in the sewer and having a bottom wall and an upper wall has been recently used. It was used, and the steam inlet and the air outlet were opened on the upper wall of this lining material. And conventionally,
First, fold the bottomed tubular lining material into a small piece, insert it into the existing human hole from the upper end opening, and then introduce heating steam from the inlet to soften the constituent resin of the lining material and Was restored to its original shape with a bottomed cylinder so that it fits the inner surface of the existing human hole, and this lining material was cooled and solidified. Then, while cutting and removing the top wall of the lining material, on the bottom wall of the lining material,
A water passage corresponding to the groove at the bottom of the existing human hole was opened. And finally, a filler such as emulsion-based polymer cement paste (so-called cement milk) is poured into the gap between the peripheral wall of the existing human hole and the peripheral wall of the lining material, and this is cured to form a bottomed cylindrical lining. The material was fixed to the inner surface of the peripheral wall, and the inner wall of the existing human hole was repaired by this.
【０００５】上記のような有底筒形ライニング材を構成
する合成樹脂として、従来は、材料コスト、耐久性、熱
変形特性等の諸点から、一般に地中構成材料としてのポ
リ塩化ビニル、側鎖を有する高密度ポリエチレン、およ
びポリプロピレンを使用していた。Conventionally, as a synthetic resin constituting the bottomed cylindrical lining material, polyvinyl chloride, a side chain, is generally used as an underground constituent material from the viewpoints of material cost, durability, thermal deformation characteristics and the like. Of high density polyethylene, and polypropylene were used.
【０００６】[0006]
【発明が解決しようとする課題】ここで、上記有底筒形
ライニング材を既設人孔の内部に挿入するさいには、こ
れを小さく折り畳むが、このときライニング材の内部
に、１．０〜１．２ｋｇｆ／ｃｍ2 の加圧蒸気で約９０
〜１０５℃にして、軟化した状態で行なわれるため、そ
の温度範囲で折畳み加工が可能でなければならない。ま
た挿入後、加圧蒸気を導入し、１．０〜１．５ｋｇｆ／
ｃｍ2 の圧力で加圧して、ライニング材を１００〜１１
０℃にして、復元した場合、横断面円形の原形に近い状
態まで復元する必要がある。加えて、ライニング材は、
これの背面にポリマーセメント・ペーストを注入するこ
とから、これらの充填剤の荷重に耐え得る強度を必要と
し、かつ既設人孔の周壁とライニング材の周壁との間に
は、ポリマーセメント・ペーストが均一に充填される必
要があった。When inserting the bottomed cylindrical lining material into the inside of the existing human hole, it is folded into a small size. About 90 with pressurized steam of 1.2 kgf / cm 2.
Since it is performed in a softened state at ˜105 ° C., it must be possible to fold in that temperature range. Also, after inserting, pressurized steam is introduced, and 1.0 to 1.5 kgf /
Apply a pressure of cm 2 to the lining material from 100 to 11
When restored at 0 ° C., it is necessary to restore to a state close to the original shape with a circular cross section. In addition, the lining material is
Since the polymer cement paste is injected into the back of this, the strength required to withstand the load of these fillers is required, and the polymer cement paste is placed between the peripheral wall of the existing human hole and the peripheral wall of the lining material. It needed to be filled uniformly.
【０００７】ところが、従来は、上記の合成樹脂よりな
る板材を円筒状に曲げて、両端部を溶接加工し、ライニ
ング材を製作していたため、このようなライニング材で
は、加圧蒸気による復元のさい、横断面円形の原形にな
らず、その形状をくずしてしまい、結果的にライニング
材の背面に注入されるポリマーセメント・ペーストの充
填量にバラツキを生じてしまうという問題があった。However, conventionally, since the plate material made of the synthetic resin described above is bent into a cylindrical shape and the both ends are welded to manufacture the lining material, such a lining material is restored by pressurized steam. In other words, there was a problem that the original shape of the cross section was not circular and the shape was broken, resulting in variations in the filling amount of the polymer cement paste injected on the back surface of the lining material.
【０００８】そこで、ライニング材としては、溶接部分
のない、例えば回転成形により一体につくられたものを
使用するのが望ましいが、回転成形によりライニング材
を一体につくるには、溶融粘度の低い樹脂を使用する必
要があり、例えばポリ塩化ビニルでは、４０重量％以上
の可塑剤を含むものに限られている。ところが、このよ
うなポリ塩化ビニルは、その剛性が不足しており、この
ため背面に注入されるポリマーセメント・ペースト等の
充填剤の荷重に耐えきれず、変形が生じ、ライニング材
としては、不適当であるという問題があった。Therefore, it is desirable to use, as the lining material, one which has no welded portion and which is integrally formed by, for example, rotational molding. However, in order to integrally form the lining material by rotational molding, a resin having a low melt viscosity is used. Is used, for example, polyvinyl chloride is limited to those containing 40% by weight or more of a plasticizer. However, such a polyvinyl chloride has insufficient rigidity, and therefore cannot bear the load of the filler such as polymer cement paste injected on the back surface and is deformed, which makes it unsuitable as a lining material. There was a problem of being suitable.
【０００９】また、ポリプロピレンでは、軟化温度が高
く、スチームによる折畳み加工、および復元が不可能で
あった。さらに、側鎖を有する高密度ポリエチレンの場
合には、剛性不足により、やはり背面に注入されるポリ
マーセメント・ペースト等の充填剤の荷重に耐えきれ
ず、変形を生じてしまうという問題があった。In addition, polypropylene has a high softening temperature and cannot be folded and restored by steam. Further, in the case of a high-density polyethylene having a side chain, there is a problem that due to insufficient rigidity, it cannot bear the load of the filler such as polymer cement paste injected on the back surface and is deformed.
【００１０】この発明の目的は、上記の従来技術の問題
を解決し、スチームによる折畳み加工および復元が可能
であり、なおかつ背面に注入される充填剤の荷重にも充
分に耐えることができて、変形を生じない有底筒形ライ
ニング材を用ることにより、現場作業が非常に少なく、
きわめて簡単に、しかも確実に、既設人孔の補修をする
ことができるとともに、補修コストが安くつき、また例
えば交通量の多い交差点においても、交通渋滞を最小限
にとどめて、既設人孔の補修作業を実施することができ
る、下水道における既設人孔の補修方法を提供しようと
するにある。An object of the present invention is to solve the above-mentioned problems of the prior art, to enable folding and restoration by steam, and to sufficiently bear the load of the filler injected to the back surface. By using a bottomed cylindrical lining material that does not deform, there is very little on-site work,
It is extremely easy and reliable to repair an existing human hole, and the repair cost is low.For example, at an intersection with a lot of traffic, traffic congestion should be minimized to repair the existing human hole. There is an attempt to provide a method of repairing an existing foramen in a sewer that can carry out the work.
【００１１】[0011]
【課題を解決するための手段】この発明は、上記の目的
を達成するために、下水道における既設人孔の内壁を覆
う形状を有しかつ底壁と上壁とを有する合成樹脂製の有
底筒形ライニング材を用意し、このライニング材の上壁
にスチーム導入口と空気等排出口があけられており、こ
のライニング材を小さく折り畳んで、既設人孔内に、こ
れの上端開口部より挿入し、挿入後、導入口より加熱ス
チームを導入して、ライニング材の構成樹脂を軟化せし
め、ライニング材を有底筒形に復元した後、ライニング
材を冷却固化せしめ、ライニング材の上壁を切断除去す
るとともに、ライニング材の底壁に、既設人孔の底部の
凹溝に対応する通水孔をあけ、最後に、既設人孔の周壁
とライニング材の周壁との間の間隙にポリマーセメント
・ペースト等よりなる充填剤を流し込み、これを硬化せ
しめて、有底筒形ライニング材を周壁内面に固定し、こ
れによって既設人孔の内壁を補修する方法において、有
底筒形ライニング材を構成する合成樹脂として、直鎖状
低密度ポリエチレンであって、０．９１５〜０．９３５
ｇ／ｃｍ3 の平均密度を有するものを使用することを特
徴とする、下水道における既設人孔の補修方法を要旨と
している。In order to achieve the above-mentioned object, the present invention has a bottom made of synthetic resin, which has a shape covering an inner wall of an existing human hole in sewer and has a bottom wall and an upper wall. A cylindrical lining material is prepared, and a steam inlet and an outlet for air etc. are opened on the upper wall of this lining material.The lining material is folded into a small size and inserted into the existing human hole from the upper end opening. Then, after inserting, heat steam is introduced from the inlet to soften the constituent resin of the lining material, restore the lining material to the bottomed cylindrical shape, then cool and solidify the lining material, and cut the upper wall of the lining material. Along with the removal, a water passage hole corresponding to the recessed groove at the bottom of the existing human hole is opened in the bottom wall of the lining material, and finally, the polymer cement is placed in the gap between the peripheral wall of the existing human hole and the peripheral wall of the lining material. From paste etc. In order to repair the inner wall of the existing human hole by fixing the bottomed cylindrical lining material to the inner surface of the peripheral wall by pouring a filling agent, the synthetic resin that constitutes the bottomed cylindrical lining material. , Linear low density polyethylene, 0.915-0.935
The gist is a method for repairing an existing human hole in a sewer, which is characterized by using a material having an average density of g / cm 3 .
【００１２】上記において、有底筒形ライニング材を構
成する合成樹脂として、直鎖状低密度ポリエチレン（い
わゆるリニア・ポリエチレン）であって、０．９１５〜
０．９３５ｇ／ｃｍ3 の平均密度を有するものを使用す
る。In the above description, linear low-density polyethylene (so-called linear polyethylene) is used as the synthetic resin for forming the bottomed tubular lining material, and is 0.915 to
A material having an average density of 0.935 g / cm 3 is used.
【００１３】ここで、直鎖状低密度ポリエチレンの平均
密度が、０．９１５ｇ／ｃｍ3 未満であれば、剛性不足
により、背面に注入される充填剤の荷重に耐えきれず、
変形を起こしてしまうので、好ましくない。また平均密
度が、０．９３５ｇ／ｃｍ3 を越えると、軟化し難くな
るために、スチームによる折畳み加工および復元が不可
能であり、また例え強制的な折畳み加工により折畳みが
できたとしても、挿入後の加熱蒸気による復元のさい、
極端に折り曲がった部分の復元は不可能であるため、横
断面円形の原形に戻らず、その形状がくずれてしまい、
結果的にライニング材の背面に注入されるポリマーセメ
ント・ペースト等よりなる充填剤の充填量にバラツキを
生じるので、好ましくない。If the linear low-density polyethylene has an average density of less than 0.915 g / cm 3 , the rigidity of the linear low-density polyethylene is insufficient to withstand the load of the filler injected to the back surface.
It is not preferable because it causes deformation. Further, when the average density exceeds 0.935 g / cm 3 , it becomes difficult to soften, so folding and restoration by steam are impossible, and even if folding is possible by forced folding, insertion is possible. After the restoration by heated steam,
Since it is impossible to restore the extremely bent part, it does not return to the original shape with a circular cross section, and its shape collapses,
As a result, the filling amount of the filler made of polymer cement, paste or the like injected on the back surface of the lining material varies, which is not preferable.
【００１４】[0014]
【作用】上記下水道における既設人孔の補修方法によれ
ば、特定の平均密度を有する直鎖状低密度ポリエチレン
よりなる有底筒形ライニング材を使用するため、スチー
ムによる折畳み加工および復元が可能であり、なおかつ
背面に注入される充填剤の荷重にも充分に耐えることが
できて、変形を生じない。そして、このような有底筒形
ライニング材を用ることにより、現場作業が非常に少な
く、きわめて簡単に、しかも確実に、既設人孔の補修を
することができるとともに、補修コストが安くつき、ま
た例えば交通量の多い交差点においても、交通渋滞を最
小限にとどめて、既設人孔の補修作業を実施することが
できる。According to the method for repairing the existing human hole in the sewer system, since the bottomed cylindrical lining material made of linear low density polyethylene having a specific average density is used, it can be folded and restored by steam. In addition, it is possible to withstand the load of the filler injected to the back surface sufficiently and not to be deformed. And, by using such a bottomed tubular lining material, there is very little on-site work, and the existing human hole can be repaired very easily and reliably, and the repair cost is low, Further, for example, even at an intersection with a large amount of traffic, it is possible to minimize traffic congestion and perform repair work on an existing human hole.
【００１５】[0015]
【実施例】つぎに、この発明の実施例を図面に基づいて
説明する。Embodiments of the present invention will now be described with reference to the drawings.
【００１６】図面は、この発明による下水道における既
設人孔の補修方法を説明するためのものである。The drawings are for explaining a method for repairing an existing human hole in a sewer according to the present invention.
【００１７】まず、図１と図２において、下水道におけ
る既設人孔(1) は、例えば上端開口部(1b)の直径が６０
０ｍｍ、および底部(1a)の直径が９００ｍｍで、底部(1
a)の大きさが開口部(1b)よりも大きいものとなされてい
る。図３と図４に示すように、この既設人孔(1)の内壁
の大きさに合わせて、厚さ約６ｍｍの直鎖状低密度ポリ
エチレンよりなる有底筒形ライニング材(11)を、予め回
転成形により製造した。First, in FIGS. 1 and 2, the existing human hole (1) in the sewer has a diameter of, for example, 60 at the upper end opening (1b).
0 mm, and the bottom (1a) has a diameter of 900 mm, the bottom (1a)
The size of a) is larger than the opening (1b). As shown in FIGS. 3 and 4, according to the size of the inner wall of the existing human hole (1), a bottomed cylindrical lining material (11) made of linear low-density polyethylene with a thickness of about 6 mm was used. Preliminarily manufactured by rotational molding.
【００１８】このようなライニング材(11)を構成する合
成樹脂としては、直鎖状の低密度ポリエチレンであっ
て、０．９１５ｇ／ｃｍ3 （実施例１）および０．９３
５ｇ／ｃｍ3 （実施例２）の平均密度を有するものを使
用した。これらのライニング材(11)は、底壁(12)と上壁
(13)とを有し、かつその上壁(13)にスチーム導入口(15)
と空気等排出口(16)があけられている。The synthetic resin constituting such a lining material (11) is linear low-density polyethylene of 0.915 g / cm 3 (Example 1) and 0.93 g / cm 3
A material having an average density of 5 g / cm 3 (Example 2) was used. These lining materials (11) are used for the bottom wall (12) and the top wall.
(13) and has a steam inlet (15) on its upper wall (13)
And the air outlet (16) are opened.
【００１９】これらのライニング材(11)を、図５に示す
ように、既設人孔(1) の上端開口部(1b)より小さくなる
ように、５００ｍｍφに大きさに折り畳んで、図２に示
すように、既設人孔(1) の上端開口部(1b)より挿入し
た。As shown in FIG. 5, these lining materials (11) are folded into a size of 500 mmφ so as to be smaller than the upper end opening (1b) of the existing human hole (1), and shown in FIG. As described above, it was inserted from the upper end opening (1b) of the existing human hole (1).
【００２０】挿入後、導入口(15)より折畳み状有底筒形
ライニング材(11)の内部に加熱スチームを入れて、ライ
ニング材(11)の構成樹脂を軟化せしめ、ライニング材(1
1)を、蒸気圧１．３ｋｇｆ／ｃｍ2 で、図３に示すよう
な有底筒形に復元した。After the insertion, heating steam is put into the folding bottomed cylindrical lining material (11) through the introduction port (15) to soften the constituent resin of the lining material (11), and the lining material (1
1) was restored to a bottomed tubular shape as shown in FIG. 3 with a vapor pressure of 1.3 kgf / cm 2 .
【００２１】ついで、加熱スチームを圧縮空気に切り替
えて、ライニング材(11)を冷却固化せしめた後、図１に
示すように、ライニング材(11)の上壁(13)を切断除去す
るとともに、ライニング材(11)の底壁(12)に、既設人孔
(1) の底部(1a)の凹溝(2) に対応する通水孔(17)をあけ
た。Then, the heating steam is switched to compressed air to cool and solidify the lining material (11), and then the upper wall (13) of the lining material (11) is cut and removed as shown in FIG. The bottom wall (12) of the lining material (11) has an existing human hole.
A water passage hole (17) corresponding to the groove (2) at the bottom (1a) of (1) was opened.
【００２２】そして最後に、既設人孔(1) の周壁(1c)と
ライニング材(11)の周壁(14)との間の間隙に、比重１．
８ｇ／ｃｍ3 のエマルジョン系ポリマーセメント・ペー
スト（いわゆるセメントミルク）よりなる充填剤(18)を
流し込み、これを硬化せしめて、有底筒形ライニング材
(11)を、既設人孔(1) の周壁(1c)内面に固定し、これに
よって既設人孔(1) の内壁を補修した。Finally, in the gap between the peripheral wall (1c) of the existing human hole (1) and the peripheral wall (14) of the lining material (11), a specific gravity of 1.
A filler (18) made of 8 g / cm 3 of an emulsion polymer cement paste (so-called cement milk) is poured and hardened to form a bottomed cylindrical lining material.
(11) was fixed to the inner surface of the peripheral wall (1c) of the existing human hole (1), and thereby the inner wall of the existing human hole (1) was repaired.
【００２３】上記のこの発明の方法によれば、現場作業
が非常に少なく、従ってきわめて簡単にかつ確実に、既
設人孔(1) の補修をすることができる。従って、例えば
交通量の多い交差点において、既設人孔の補修作業を実
施しても、交通渋滞が生じない。According to the method of the present invention described above, the site work is extremely small, and therefore the existing manhole (1) can be repaired very easily and reliably. Therefore, for example, at an intersection with a large amount of traffic, traffic congestion does not occur even if repair work is performed on an existing human hole.
【００２４】補修作業の終了後、硬化したライニング材
(11)について、これの内面より肉眼検査により凹みの有
無および復元性を観察し、得られた結果を下記表１にま
とめて示した。Hardened lining material after completion of repair work
With respect to (11), the presence or absence of dents and the restoring property were observed by visual inspection from the inner surface thereof, and the obtained results are summarized in Table 1 below.
【００２５】また、比較のために、有底筒形ライニング
材を構成する合成樹脂として、直鎖状低密度ポリエチレ
ンであるが、この発明の範囲以外の、０．９００ｇ／ｃ
ｍ3 （比較例１）および０．９４０ｇ／ｃｍ3 （比較例
２）の平均密度を有するものを使用した場合、並びに平
均密度は０．９２０ｇ／ｃｍ3 であるが、側鎖を有する
ポリエチレンよりなるライニング材（比較例３）を使用
した場合について、それぞれ同様に実施し、これらの比
較例について得られた結果を、下記表１にあわせて示し
た。For comparison, a straight-chain low-density polyethylene is used as the synthetic resin constituting the bottomed cylindrical lining material, but is 0.900 g / c outside the scope of the present invention.
m 3 (Comparative Example 1) and 0.940 g / cm 3 (Comparative Example 2) with average densities were used, and the average density was 0.920 g / cm 3 , compared to polyethylene with side chains. The same results were obtained for the case of using the lining material (Comparative Example 3), and the results obtained for these Comparative Examples are also shown in Table 1 below.
【００２６】[0026]
【表１】 [Table 1]
【００２７】上記表１から明らかなように、この発明の
補修方法によれば、有底筒形ライニング材(11)は、スチ
ームによる折畳み加工および復元が可能であり、なおか
つ背面に注入されるポリマーセメント・ペーストよりな
る充填剤(18)の荷重にも充分に耐えることができて、変
形を生じない。従って現場作業が非常に少なく、きわめ
て簡単に、しかも確実に、既設人孔の補修をすることが
できるものである。As is clear from Table 1 above, according to the repairing method of the present invention, the bottomed tubular lining material (11) can be folded and restored by steam and the polymer injected on the back surface. It can withstand the load of the filler (18) made of cement paste and does not deform. Therefore, the on-site work is extremely small, and the existing human hole can be repaired very easily and reliably.
【００２８】これに対し、平均密度が０．９００ｇ／ｃ
ｍ3 の直鎖状低密度ポリエチレンを使用した比較例１、
および平均密度は０．９２０ｇ／ｃｍ3 であるが、側鎖
を有するポリエチレンを使用した比較例３では、いずれ
も剛性不足により、背面に注入される充填剤の荷重に耐
えきれず、変形が生じた。また平均密度が０．９４０ｇ
／ｃｍ3 と高い直鎖状低密度ポリエチレンを使用した比
較例３では、固くなるために、スチームによる折畳み加
BR>工および復元が不可能であり、また例え強制的な折
畳み加工により折畳みができたとしても、挿入後の加熱
蒸気による復元のさい、極端に折り曲がった部分の復元
は不可能であるため、横断面円形の原形に戻らず、その
形状がくずれてしまい、結果的にライニング材の背面に
注入されるポリマーセメント・ペーストの充填量にバラ
ツキを生じた。On the other hand, the average density is 0.900 g / c
Comparative Example 1 using m 3 linear low density polyethylene,
And the average density is 0.920 g / cm 3 , but in Comparative Example 3 in which polyethylene having a side chain is used, due to insufficient rigidity, it cannot bear the load of the filler injected to the back surface and is deformed. It was The average density is 0.940g
In Comparative Example 3 in which a linear low-density polyethylene having a high linearity of 1 / cm 3 is used, folding is performed by steam in order to harden.
BR> It is impossible to restore and restore, and even if it is possible to fold it by forced folding, it is impossible to restore the extremely bent part when restoring it with heated steam after insertion. However, the shape did not return to the original shape with a circular cross section, and the shape collapsed, resulting in variations in the filling amount of the polymer cement paste injected on the back surface of the lining material.
【００２９】[0029]
【発明の効果】この発明は、上述のように、下水道にお
ける既設人孔の内壁を覆う形状を有しかつ底壁と上壁と
を有する合成樹脂製の有底筒形ライニング材を用意し、
このライニング材の上壁にスチーム導入口と空気等排出
口があけられており、このライニング材を小さく折り畳
んで、既設人孔内に、これの上端開口部より挿入し、挿
入後、導入口より加熱スチームを導入して、ライニング
材の構成樹脂を軟化せしめ、ライニング材を有底筒形に
復元した後、ライニング材を冷却固化せしめ、ライニン
グ材の上壁を切断除去するとともに、ライニング材の底
壁に、既設人孔の底部の凹溝に対応する通水孔をあけ、
最後に、既設人孔の周壁とライニング材の周壁との間の
間隙にポリマーセメント・ペースト等よりなる充填剤を
流し込み、これを硬化せしめて、有底筒形ライニング材
を周壁内面に固定し、これによって既設人孔の内壁をを
補修する方法において、有底筒形ライニング材(11)を構
成する合成樹脂として、直鎖状低密度ポリエチレンであ
って、０．９１５〜０．９３５ｇ／ｃｍ3 の平均密度を
有するものを使用することを特徴とするもので、この発
明の方法によれば、スチームによる折畳み加工および復
元が可能であり、なおかつ背面に注入されるポリマーセ
メント・ペースト等の充填剤の荷重にも充分に耐えるこ
とができて、変形を生じない有底筒形ライニング材を用
ることにより、現場作業が非常に少なく、きわめて簡単
に、しかも確実に、既設人孔の補修をすることができる
とともに、補修コストが安くつき、また例えば交通量の
多い交差点においても、交通渋滞を最小限にとどめて、
既設人孔の補修作業を実施することができるという効果
を奏する。As described above, the present invention provides a bottomed cylindrical lining material made of synthetic resin having a shape for covering the inner wall of an existing human hole in the sewer and having a bottom wall and an upper wall,
A steam inlet and an outlet for air etc. are opened in the upper wall of this lining material, and this lining material is folded into a small size and inserted into the existing human hole through the upper end opening of the lining material. After introducing heating steam to soften the constituent resin of the lining material and restore the lining material to a bottomed cylindrical shape, the lining material is cooled and solidified, the upper wall of the lining material is cut and removed, and the bottom of the lining material is removed. On the wall, open a water hole corresponding to the groove at the bottom of the existing human hole,
Finally, a filler made of polymer cement paste or the like is poured into the gap between the peripheral wall of the existing human hole and the peripheral wall of the lining material, and this is cured to fix the bottomed tubular lining material to the inner surface of the peripheral wall, In the method of repairing the inner wall of the existing human hole by this, as the synthetic resin constituting the bottomed cylindrical lining material (11), linear low-density polyethylene, 0.915 to 0.935 g / cm 3 According to the method of the present invention, it is possible to fold and restore by steam, and a filler such as a polymer cement paste to be injected on the back surface. By using a bottomed cylindrical lining material that can withstand the load of, and does not cause deformation, there is very little field work, and it is extremely easy and reliable. It is possible to repair the 設人 holes, repair cost per cheaper, also in busy intersection of example traffic, with minimal traffic congestion,
An effect that repair work of an existing human hole can be carried out is achieved.
【図１】この発明の方法により補修した後の既設人孔の
断面図である。FIG. 1 is a cross-sectional view of an existing human hole after being repaired by the method of the present invention.
【図２】小さく折り畳んだライニング材を、既設人孔の
内部に挿入した状態を示す断面図である。FIG. 2 is a cross-sectional view showing a state in which a smallly folded lining material is inserted inside an existing human hole.
【図３】有底筒形ライニング材の部分切欠き正面図であ
る。FIG. 3 is a partially cutaway front view of a bottomed tubular lining material.
【図４】同ライニング材の平面図である。FIG. 4 is a plan view of the same lining material.
【図５】同ライニング材の折り畳み状態の斜視図であ
る。FIG. 5 is a perspective view of the lining material in a folded state.
１ 既設人孔 １ａ 底部 １ｂ 開口部 １ｃ 周壁 ２ 凹溝 １１ 直鎖状低密度ポリエチレン製の有底筒形ラ
イニング材 １２ 底壁 １３ 上壁 １４ 周壁 １５ スチーム導入口 １６ 空気等排出口 １７ 通水孔 １８ ポリマーセメント・ペースト等よりなる充
填剤1 Existing human hole 1a Bottom part 1b Opening part 1c Circumferential wall 2 Recessed groove 11 Recessed tubular lining material made of linear low density polyethylene 12 Bottom wall 13 Upper wall 14 Circumferential wall 15 Steam introduction port 16 Air discharge port 17 Water passage hole 18 Filler made of polymer cement, paste, etc.
Claims (1)
う形状を有しかつ底壁(12)と上壁(13)とを有する合成樹
脂製の有底筒形ライニング材(11)を用意し、このライニ
ング材(11)の上壁(13)にスチーム導入口(15)と空気等排
出口(16)があけられており、このライニング材(11)を小
さく折り畳んで、既設人孔(1) 内に、これの上端開口部
(1b)より挿入し、挿入後、導入口(15)より加熱スチーム
を導入して、ライニング材(11)の構成樹脂を軟化せし
め、ライニング材(11)を有底筒形に復元した後、ライニ
ング材(11)を冷却固化せしめ、ライニング材(11)の上壁
(13)を切断除去するとともに、ライニング材(11)の底壁
(12)に、既設人孔(1) の底部(1a)の凹溝(2) に対応する
通水孔(17)をあけ、最後に、既設人孔(1) の周壁(1c)と
ライニング材(11)の周壁(14)との間の間隙にポリマーセ
メント・ペースト等よりなる充填剤(18)を流し込み、こ
れを硬化せしめて、有底筒形ライニング材(11)を周壁(1
c)内面に固定し、これによって既設人孔(1) の内壁を補
修する方法において、有底筒形ライニング材(11)を構成
する合成樹脂として、直鎖状低密度ポリエチレンであっ
て、０．９１５〜０．９３５ｇ／ｃｍ3 の平均密度を有
するものを使用することを特徴とする、下水道における
既設人孔の補修方法。1. A bottomed cylindrical lining material (11) made of synthetic resin, which has a shape covering an inner wall of an existing human hole (1) in sewerage and has a bottom wall (12) and a top wall (13). The lining material (11) has a steam inlet (15) and an air outlet (16) in the upper wall (13) of the lining material (11). (1) Into the top opening of this
Inserted from (1b), after insertion, introduced heating steam from the inlet (15), to soften the constituent resin of the lining material (11), after restoring the lining material (11) into a bottomed tubular shape, The lining material (11) is cooled and solidified, and the upper wall of the lining material (11)
The bottom wall of the lining material (11) as well as cutting and removing (13)
A water passage hole (17) corresponding to the groove (2) at the bottom (1a) of the existing human hole (1) is opened in (12), and finally, the peripheral wall (1c) and the lining of the existing human hole (1) are lined. A filler (18) made of polymer cement, paste, etc. is poured into the gap between the peripheral wall (14) of the material (11) and cured, and the bottomed cylindrical lining material (11) is attached to the peripheral wall (1).
c) In the method of fixing to the inner surface and repairing the inner wall of the existing human hole (1) by this, as the synthetic resin constituting the bottomed tubular lining material (11), linear low density polyethylene A method for repairing an existing human hole in a sewer, characterized in that a material having an average density of 0.915 to 0.935 g / cm 3 is used.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3220383A JP2552593B2 (en) | 1991-08-30 | 1991-08-30 | Method of repairing existing human hole in sewer |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP3220383A JP2552593B2 (en) | 1991-08-30 | 1991-08-30 | Method of repairing existing human hole in sewer |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH0559739A JPH0559739A (en) | 1993-03-09 |
| JP2552593B2 true JP2552593B2 (en) | 1996-11-13 |
Family
ID=16750264
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP3220383A Expired - Lifetime JP2552593B2 (en) | 1991-08-30 | 1991-08-30 | Method of repairing existing human hole in sewer |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2552593B2 (en) |
Cited By (1)
| 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 |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP3839605B2 (en) * | 1998-12-22 | 2006-11-01 | 株式会社湘南合成樹脂製作所 | Manhole lining material |
| KR100395005B1 (en) * | 2001-01-31 | 2003-08-19 | 한국건설기술연구원 | Manhole repairing apparatus and manhole repairing method using the same |
| JP5302696B2 (en) * | 2008-07-11 | 2013-10-02 | 株式会社湘南合成樹脂製作所 | Manhole rehabilitation method |
| JP6858574B2 (en) * | 2017-01-24 | 2021-04-14 | 日本車輌製造株式会社 | Adhesion-enhanced drainage basin |
-
1991
- 1991-08-30 JP JP3220383A patent/JP2552593B2/en not_active Expired - Lifetime
Cited By (1)
| 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 |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0559739A (en) | 1993-03-09 |
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