JP4170944B2 - How to remove manhole cover frame. - Google Patents

How to remove manhole cover frame. Download PDF

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JP4170944B2
JP4170944B2 JP2004105654A JP2004105654A JP4170944B2 JP 4170944 B2 JP4170944 B2 JP 4170944B2 JP 2004105654 A JP2004105654 A JP 2004105654A JP 2004105654 A JP2004105654 A JP 2004105654A JP 4170944 B2 JP4170944 B2 JP 4170944B2
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lid frame
cutting
human hole
road surface
lid
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光栄 倉持
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タカマツ株式会社
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Description

本発明は、コンクリートやアスファルトで舗装された道路や床面等の舗装面(路面)に既設されている人孔(マンホール)の蓋枠(人孔蓋枠)を撤去する方法に関するものである。   TECHNICAL FIELD The present invention relates to a method for removing a manhole cover frame (manhole cover frame) already installed on a pavement surface (road surface) such as a road or floor paved with concrete or asphalt.

路面に開口する人孔(マンホール)の口(人孔口)は開閉自在な蓋で塞がれているが、その蓋は路面層に埋設されている蓋枠に嵌合されている。一般に、この蓋枠は蓋と対に形成されているため、人孔蓋の取替えの実質は蓋及び蓋枠の取替えとなる。 An opening (manhole opening) of a human hole (manhole) that opens on the road surface is closed with a lid that can be freely opened and closed, and the lid is fitted to a lid frame embedded in the road surface layer. In general, since the lid frame is formed in a pair with the lid, the substantial replacement of the human hole lid is the replacement of the lid and the lid frame.

例えばアスファルトで舗装された路面では、蓋枠の外周縁にアスファルトが密着しているため、路面(路面層)から蓋枠だけを撤去するのは容易でない。
このため、従来では、蓋枠の外周縁に密着したアスファルト部分を含んで路面層を円筒形状に切削した後、差込部材を人孔口の内側から、例えば人孔口の直径方向の両端から水平方向外方に向け、蓋枠の底面に沿うように水平方向に差し込み、差し込んだ状態のままで、外周縁に着いたアスファルトごと蓋枠を一気に路面(路面層)上に引き外す、という工法が採られていた。以下、この工法を従来工法という。
For example, on a road surface paved with asphalt, it is not easy to remove only the lid frame from the road surface (road surface layer) because the asphalt is in close contact with the outer periphery of the lid frame.
For this reason, conventionally, after cutting the road surface layer into a cylindrical shape including an asphalt portion in close contact with the outer periphery of the lid frame, the insertion member is inserted from the inside of the human hole mouth, for example, from both ends in the diameter direction of the human hole mouth. A method of inserting horizontally in the horizontal direction along the bottom of the lid frame and pulling the lid frame together with the asphalt attached to the outer peripheral edge onto the road surface (road surface layer) at once. Was taken. Hereinafter, this construction method is referred to as a conventional construction method.

しかしながら、近時、蓋枠が、人孔の本体(躯体)、例えばコンクリート製或いは樹脂製の人孔の本体の口縁(以下、人孔本体口縁ともいう)に沿って垂直に植設された複数の蓋枠固定ボルトを介して連結固定された形式の人孔設備が出現し、設置されるようになった。
このような既設の人孔設備に対して、従来工法では蓋枠固定ボルトを取り外す作業、少なくとも植設された蓋枠固定ボルトから予め蓋枠を容易に取り外せるようフリーにしておく作業が必要となる。しかし、この蓋枠固定ボルトを緩める作業はかなり困難な作業となり、容易ではない。
However, recently, the lid frame has been vertically planted along the rim of the main body (casing) of the human hole, for example, the main body of the human hole made of concrete or resin (hereinafter, also referred to as the human hole main body rim). In addition, a human-hole facility of a type connected and fixed via a plurality of lid frame fixing bolts has appeared and has been installed.
With respect to such an existing manhole facility, the conventional method requires the operation of removing the lid frame fixing bolt, and at least the operation of freeing the lid frame in advance so that it can be easily removed from the installed lid frame fixing bolt. . However, the operation of loosening the lid frame fixing bolt is a rather difficult operation and is not easy.

本発明は、人孔本体の口縁に蓋枠固定ボルトで連結固定された人孔蓋枠を容易に取り外しできる人孔蓋枠撤去方法の提供を課題とする。   It is an object of the present invention to provide a method for removing a human hole lid frame that can easily remove the human hole lid frame that is connected and fixed to the lip of the main hole body with a lid frame fixing bolt.

本発明は、既設人孔の蓋枠の外縁に沿って円形筒状に路面上から路面下に向かって路面層を切削する円形切削工程と、人孔の内部側から人孔の本体と前記蓋枠とを締結する蓋枠固定ボルトを水平方向に切断する蓋枠固定ボルト切断工程と、前記蓋枠固定ボルトが切断された蓋枠を路面上に引き外す蓋枠引抜工程とを含むことを特徴とする。 The present invention includes a circular cutting step of cutting a road surface layer from a road surface downward to a road surface in a circular cylindrical shape along an outer edge of a lid frame of an existing human hole, and a main body of the human hole and the lid from the inner side of the human hole A lid frame fixing bolt cutting step for horizontally cutting a lid frame fixing bolt for fastening the frame; and a lid frame drawing step for pulling the lid frame having the lid frame fixing bolt cut off on a road surface. And

又、本発明は、既設人孔の蓋枠の外縁に沿って円形筒状に路面上から路面下に向かって前記蓋枠の底面下まで路面層を切削する円形切削工程と、人孔の本体と前記蓋枠の底面との間を、前記人孔の内部側から前記円筒形状の切削部位に向けて、前記人孔の本体と前記蓋枠とを締結する蓋枠固定ボルトを切断しつつ、水平方向に切削する水平切削工程と、前記蓋枠を路面上に引き外す蓋枠引抜工程とを含むことを特徴とする。 The present invention also provides a circular cutting step for cutting a road surface layer from the road surface to the bottom of the road surface and below the bottom surface of the lid frame along the outer edge of the lid frame of the existing human hole, and the main body of the human hole While cutting the lid frame fixing bolt for fastening the main body of the human hole and the lid frame from the inner side of the human hole to the cylindrical cutting site between the bottom surface of the lid frame and the bottom of the lid frame, It includes a horizontal cutting step for cutting in the horizontal direction and a lid frame drawing step for pulling off the lid frame on the road surface.

本発明によれば、人孔蓋枠の外周を円形筒状に切断した後、蓋枠固定ボルトを予め水平方向から切断しておくので、従来に比べて容易に蓋枠を引き外して撤去することができる。 According to the present invention, after the outer periphery of the manhole cover frame is cut into a circular cylindrical shape, the cover frame fixing bolt is cut in advance from the horizontal direction, so that the cover frame is easily pulled off and removed as compared with the conventional case. be able to.

以下、本発明を路面に埋設された人孔蓋枠の撤去を例にして説明する。   Hereinafter, the present invention will be described by taking as an example the removal of a manhole cover frame embedded in a road surface.

第1工程としての円形筒状切断工程。
この円形切削工程とは、既設人孔の蓋枠の外縁に沿って円形筒状に路面上から路面下に向かって前記蓋枠の底面下まで路面層を切削する工程をいう。
図1に示すように、路面1に埋設された人孔2は、当該人孔2の本体21の上部に開口する人孔口22が人孔蓋枠23を備えた人孔蓋24によって閉じられており、人孔蓋枠23は蓋枠固定ボルト25によって人孔2の本体21に直接固定されている。
Circular cylindrical cutting step as the first step.
This circular cutting step refers to a step of cutting the road surface layer in a circular cylindrical shape from the road surface to the bottom of the road surface and below the bottom surface of the cover frame along the outer edge of the existing manhole cover frame.
As shown in FIG. 1, the human hole 2 embedded in the road surface 1 is closed by a human hole lid 24 provided with a human hole lid frame 23 at a human hole port 22 that opens at the top of the main body 21 of the human hole 2. The human hole lid frame 23 is directly fixed to the main body 21 of the human hole 2 by a lid frame fixing bolt 25.

このように埋設されている人孔蓋枠23の外周縁側の路面を、人孔蓋24と同心円状となるように、図2に示すような人孔蓋枠交換作業用コアドリル3によって円形に切削することによって、人孔蓋枠(以下蓋枠ともいう)23の外周縁側を円形筒状に切断する(円形切削工程)。図中の符号31はこうして円形筒状に切断された切削部位(円形切削部位)である。尚、図2において枠体固定ボルト25は省略してある。   The road surface on the outer peripheral edge side of the human hole lid frame 23 embedded in this way is cut into a circle by the core drill 3 for human hole lid frame replacement work as shown in FIG. 2 so as to be concentric with the human hole lid 24. By doing so, the outer peripheral edge side of the human hole lid frame (hereinafter also referred to as lid frame) 23 is cut into a circular cylinder (circular cutting step). Reference numeral 31 in the drawing is a cutting part (circular cutting part) thus cut into a circular cylinder. In FIG. 2, the frame fixing bolt 25 is omitted.

第2工程としての水平切断工程(蓋枠固定ボルト切断工程)。
水平切断工程とは、人孔2の内部側から人孔2の本体21と蓋枠23とを締結する蓋枠固定ボルト25を切断する工程即ち蓋枠固定ボルト切断工程をいう。
図3の矢印Aに示すように、垂直に植設された蓋枠固定ボルト25を人孔2の内部側から水平方向へと適宜なボルト切断手段を用いて切断するのが好ましい。
Horizontal cutting step (lid frame fixing bolt cutting step) as the second step.
The horizontal cutting step refers to a step of cutting the lid frame fixing bolt 25 that fastens the main body 21 of the human hole 2 and the lid frame 23 from the inner side of the human hole 2, that is, a lid frame fixing bolt cutting step.
As shown by an arrow A in FIG. 3, it is preferable that the vertically fixed lid frame fixing bolt 25 is cut from the inner side of the human hole 2 in the horizontal direction using an appropriate bolt cutting means.

ボルト切断手段としては、例えば、図4に示すような切断装置4を用いる。ボルト切断装置4は人孔口22から人孔内に差し込み可能な円盤カッタ41を備えており、地上操作によって円盤飼った1を駆動操作し、当該円盤カッタ41部分を水平に人孔2の内壁に宛がいながら水平に深く切削させて行く。   As the bolt cutting means, for example, a cutting device 4 as shown in FIG. 4 is used. The bolt cutting device 4 is provided with a disk cutter 41 that can be inserted into the human hole through the human hole 22, and the disk cutter 1 is driven and operated by the ground operation, and the disk cutter 41 is horizontally placed on the inner wall of the human hole 2. Let's make a deep horizontal cut while addressing to.

この円盤カッタ41による水平切削工程では、蓋枠23と人孔2の本体21とを締結する蓋枠固定ボルト25を切断するのが第1の目的であるため、少なくとも蓋枠固定ボルト25を切断しきる部位に至るように深く切削すれば十分である。従って、必ずしも、円形筒状の切削部位31に達しない程度に切削するだけでもよい。
しかし、円形筒状の切削部位31に達するよう切削を進めて、この水平切削工程と上記の円筒切削工程とで、蓋枠23を含む路面層を短円筒形状に切削する方が後述の撤去作業を容易に行うことができる点で有利である。
In the horizontal cutting process by the disk cutter 41, the first purpose is to cut the lid frame fixing bolt 25 that fastens the lid frame 23 and the main body 21 of the human hole 2. Therefore, at least the lid frame fixing bolt 25 is cut. It is sufficient to cut deeply to reach the confined part. Therefore, the cutting may not necessarily be performed so as not to reach the circular cylindrical cutting site 31.
However, it is more effective to cut the road surface layer including the lid frame 23 into a short cylindrical shape in the horizontal cutting step and the above-described cylindrical cutting step by proceeding with cutting so as to reach the circular cylindrical cutting part 31. This is advantageous in that it can be easily performed.

第3工程としての蓋枠引抜工程。
この蓋枠引抜工程とは、外周縁に舗装部材(例ではアスファルト)が付着した蓋枠23、より正確にはこの蓋枠23を含んだ円形筒状の塊(短円筒形状)を路面上に引き外す工程をいう。
図5に示すように、上記の水平切削工程で形成された水平切削部位42に、人孔2の内部に下ろした油圧フック手段5の複数の爪51、51を同時に差し込み、差し込んだ状態のままで、当該油圧フック手段5をクレーン等の起重手段を用いて上方に引き上げることによって、蓋枠23を含んだ円形筒状の塊を路面上に引き外す。
Lid frame drawing step as a third step.
This lid frame drawing step is a process of placing a lid frame 23 with a paving member (asphalt in the example) on the outer periphery, more precisely a circular cylindrical mass (short cylindrical shape) including the lid frame 23 on the road surface. It refers to the step of removing.
As shown in FIG. 5, the plurality of claws 51, 51 of the hydraulic hook means 5 lowered into the human hole 2 are simultaneously inserted into the horizontal cutting portion 42 formed by the above horizontal cutting process, and the plug is still inserted. Then, by pulling up the hydraulic hook means 5 using a lifting means such as a crane, the circular cylindrical lump including the lid frame 23 is pulled off on the road surface.

この場合、予め水平切削工程と上記の円筒切削工程とで、蓋枠23を含んだ円形筒状の塊を短円筒形状(蓋枠23を含む路面層)に切削しておくことで、極めて容易に撤去することができる。   In this case, it is extremely easy to cut a circular cylindrical mass including the lid frame 23 into a short cylindrical shape (a road surface layer including the lid frame 23) in advance by the horizontal cutting step and the cylindrical cutting step described above. Can be removed.

本発明は、人孔本体にボルト固定された人孔蓋枠の撤去作業において利用することができる。   The present invention can be used in the removal work of the manhole cover frame bolted to the manhole body.

蓋枠の埋設状態を示す断面図である(実施例1)。(Example 1) which is sectional drawing which shows the embedment state of a lid frame. 円形切断工程を示す断面図である(実施例1)。It is sectional drawing which shows a circular cutting process (Example 1). 水平切断工程を示す断面図である(実施例1)。It is sectional drawing which shows a horizontal cutting process (Example 1). 水平切断状態を示す説明図である(実施例1)。(Example 1) which is explanatory drawing which shows a horizontal cutting | disconnection state. 蓋枠引抜工程を示す断面図である(実施例1)。It is sectional drawing which shows a lid frame extraction process (Example 1).

符号の説明Explanation of symbols

1 路面
2 人孔
21 人孔本体
23 蓋枠
25 蓋枠固定ボルト
3 人孔蓋枠交換作業用コアドリル
31 切削部位(円形切削部位)
4 ボルト切断装置
41 円盤カッタ
5 油圧フック手段
51 爪

DESCRIPTION OF SYMBOLS 1 Road surface 2 Human hole 21 Human hole main body 23 Lid frame 25 Lid frame fixing bolt 3 Core drill 31 for manhole cover frame exchange work Cutting site (circular cutting site)
4 Bolt cutting device 41 Disc cutter 5 Hydraulic hook means 51 Claw

Claims (2)

既設人孔の蓋枠の外縁に沿って円形筒状に路面上から路面下に向かって路面層を切削する円形切削工程と、
人孔の内部側から人孔の本体と前記蓋枠とを締結する蓋枠固定ボルトを水平方向に切断する蓋枠固定ボルト切断工程と、
前記蓋枠固定ボルトが切断された蓋枠を路面上に引き外す蓋枠引抜工程とを含むことを特徴とする人孔蓋枠撤去方法。
A circular cutting step of cutting the road surface layer from the road surface downward to the road surface in a circular cylindrical shape along the outer edge of the lid frame of the existing human hole,
A lid frame fixing bolt cutting step for horizontally cutting a lid frame fixing bolt for fastening the main body of the human hole and the lid frame from the inside of the human hole;
A method for removing a human hole lid frame, comprising: a lid frame pulling step of pulling the lid frame from which the lid frame fixing bolt is cut off on a road surface.
既設人孔の蓋枠の外縁に沿って円形筒状に路面上から路面下に向かって前記蓋枠の底面下まで路面層を切削する円形切削工程と、
人孔の本体と前記蓋枠の底面との間を、前記人孔の内部側から前記円筒形状の切削部位に向けて、前記人孔の本体と前記蓋枠とを締結する蓋枠固定ボルトを切断しつつ、水平方向に切削する水平切削工程と、
前記蓋枠を路面上に引き外す蓋枠引抜工程とを含むことを特徴とする人孔蓋枠撤去方法。


A circular cutting step of cutting the road surface layer from the road surface to the lower surface of the lid frame down to the bottom surface of the lid frame along the outer edge of the lid frame of the existing human hole,
A lid frame fixing bolt for fastening the main body of the human hole and the lid frame between the main body of the human hole and the bottom surface of the lid frame from the inner side of the human hole toward the cylindrical cutting site. A horizontal cutting process of cutting in a horizontal direction while cutting,
A method for removing a manhole cover frame, comprising: a cover frame pulling step of pulling the cover frame off on a road surface.


JP2004105654A 2004-03-31 2004-03-31 How to remove manhole cover frame. Expired - Lifetime JP4170944B2 (en)

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WO2009136367A1 (en) * 2008-05-06 2009-11-12 David John Drake Hawkins A method of constructing a manhole in a road and a manhole plug
GB2483026B (en) * 2008-05-06 2015-05-20 David John Drake Hawkins A method of constructing a manhole in a road and a manhole plug
KR101901201B1 (en) * 2016-08-11 2018-09-27 전동수 Road surface cutting apparatus using pot hole repairing
JP6401338B1 (en) * 2017-05-19 2018-10-10 株式会社Nom How to replace the manhole cover and its receiving frame
CN111005299B (en) * 2019-12-31 2021-05-04 江苏阿道夫公路特种养护工程有限公司 Anti-cracking maintenance process for asphalt pavement around well cover

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JP2000144773A (en) * 1998-11-12 2000-05-26 Aichi Corp Manhole repairing motor vehicle
JP2000202777A (en) * 1999-01-12 2000-07-25 Js Corp Sander blade for peeling off paint film and paint film peeling off device provided with it
JP3032530B1 (en) * 1999-05-17 2000-04-17 大宝ダイヤモンド工業株式会社 Dry surfacer
JP2001040686A (en) * 1999-05-21 2001-02-13 Komatsu Ltd Removing equipment for manhole receiving frame
JP3653236B2 (en) * 2000-05-11 2005-05-25 東京瓦斯株式会社 Paving surface cutting equipment
JP3531033B2 (en) * 2001-02-19 2004-05-24 新晃興業株式会社 Apparatus and method for cutting manhole neck

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