JPH02209530A - Manhole constructing method and frame - Google Patents

Manhole constructing method and frame

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Publication number
JPH02209530A
JPH02209530A JP1025825A JP2582589A JPH02209530A JP H02209530 A JPH02209530 A JP H02209530A JP 1025825 A JP1025825 A JP 1025825A JP 2582589 A JP2582589 A JP 2582589A JP H02209530 A JPH02209530 A JP H02209530A
Authority
JP
Japan
Prior art keywords
manhole
concrete
slab
frame
formwork
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.)
Pending
Application number
JP1025825A
Other languages
Japanese (ja)
Inventor
Shozo Urashi
浦志 省三
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Individual
Original Assignee
Individual
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Individual filed Critical Individual
Priority to JP1025825A priority Critical patent/JPH02209530A/en
Publication of JPH02209530A publication Critical patent/JPH02209530A/en
Pending legal-status Critical Current

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  • Underground Structures, Protecting, Testing And Restoring Foundations (AREA)

Abstract

PURPOSE:To simplify works by provisionally fixing the bottom of a manhole frame, wherein the top of cylindrical part is provided with enlarged step for fitting of a manhole lid, to the oversurface of an approx. horizontal form for forming of the undersurface of slab, and by placing concrete. CONSTITUTION:An enlarged step 21b to support a manhole lid 10 upon fitting it is formed at the top of an FRP manhole frame 21 in the form, for ex., of a cylinder while a circular flange 21c is formed at the bottom. Then a flange 21c is provisionally fixed to a certain required place on the oversurface of a form 2 for slab 1 using nail 22, etc., and concrete 5 is placed till the top of the frame 21. When concrete for slab is placed, this frame 21 is used as a form for manhole, and after hardening of the concrete, the form 2 is removed. This simplifies works.

Description

【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、下方に空所を有するコンクリート製のスラブ
にマンホールを施工する方法、及びその方法の実施に直
接使用するものであって、施工時のコンクリート打設用
型枠を兼ねるマンホール枠に関するものである。
[Detailed Description of the Invention] [Industrial Application Field] The present invention relates to a method for constructing a manhole in a concrete slab having a hollow space below, and a method directly used for implementing the method. This relates to manhole frames that also serve as formwork for concrete pouring.

〔従来の技術〕[Conventional technology]

従来、汚水浄化槽や貯水槽等において、マンホールを有
するコンクリート製のスラブを形成するには、通常、第
5図に示すように、スラ°ブ(1)の下面形成用のほぼ
水平な型枠(2)の上面要所に。
Conventionally, in order to form a concrete slab with a manhole in a sewage septic tank, a water storage tank, etc., as shown in Fig. 5, a substantially horizontal formwork ( 2) At key points on the top.

製作の容易な正方形筒状のマンホール用型枠(3)を仮
止めし、かつスラブ(1)用の鉄筋(図示省略)上部要
所にアンカーボルト(4)の下端シ溶着して。
An easy-to-manufacture square cylindrical formwork for a manhole (3) is temporarily fixed, and the lower ends of anchor bolts (4) are welded to key points on the top of reinforcing bars (not shown) for the slab (1).

コンクリート(5)が打設される。Concrete (5) is poured.

コンクリ−1−(5)の硬化後、第6図と第7図に示す
ように、型枠(2)(3)を取り外し、形成された正方
形の窓孔(6)の上面を囲むように、スラブ(1)上に
、鋳鉄製の円環状マンホール枠(7)の下端における方
形(又は円環形)のフランジ(7a)を載設し、上記ア
ンカーボルト(4)にナツト(8)を螺合することによ
り止着した後、スラブ(1)上に、マンホール枠(7)
の上端まで達するように1モルタル(9)またはコンク
リートを打設する。
After the concrete 1-(5) has hardened, as shown in Figures 6 and 7, the formwork (2) and (3) are removed, and the formwork (2) and (3) are removed so as to surround the upper surface of the square window hole (6). , a square (or annular) flange (7a) at the lower end of a cast iron annular manhole frame (7) is placed on the slab (1), and a nut (8) is screwed onto the anchor bolt (4). After the manhole frame (7) is fixed on the slab (1),
Place 1 mortar (9) or concrete so that it reaches the top of the hole.

このようにして埋設されたマンホール枠(7)の上側に
形成しである拡大段部(7b)に、鋳鉄製の円形マンホ
ール蓋(10)がはめ込まれる。
A circular manhole cover (10) made of cast iron is fitted into the enlarged step (7b) formed on the upper side of the manhole frame (7) buried in this way.

図示を省略したが、上記マンホール用型枠(3)を、例
えばベニヤ板を円形に丸めることにより、円筒形として
、その上端に、環状のマンホール枠を仮止めして、コン
クリートを打設し、スラブ(1)にマンホールを形成す
る方法もある。
Although not shown, the manhole form (3) is made into a cylindrical shape by, for example, rolling a plywood board into a circle, an annular manhole frame is temporarily fixed to the upper end of the form, concrete is poured, and a slab is formed. There is also a method (1) of forming a manhole.

なお、マンホール枠及びマンホール型枠を、ともに角型
とすることもある。
Note that both the manhole frame and the manhole form may be square.

〔発明が解決しようとする課題〕[Problem to be solved by the invention]

上述の前者の方法によると、スラブ(1)の完成に、コ
ンクリート(5)とモルタル(9)あるいはコンクリー
トの2度打ちをする必要があるため、工事が複雑となる
とともに、工期が長くなり、しかも、スラブ(1)の窓
孔(6)が方形で、マンホール枠(7)の拡大段部(7
b)力筒13形であるため、完成した浄化槽等の内面は
見苦しい。
According to the former method described above, it is necessary to pour concrete (5) and mortar (9) or concrete twice to complete the slab (1), which complicates the construction work and lengthens the construction period. Moreover, the window hole (6) of the slab (1) is square, and the enlarged step part (7) of the manhole frame (7)
b) Since it is a cylinder 13 type, the inner surface of the completed septic tank is unsightly.

また、型枠(3)の歪み、あるいはアンカーボルト(4
)やマンホール枠(7)の仮止め位置の誤差により、窓
孔(6)の角部とマンホール枠(7)のフランジ(7a
)との間に間隙が生じやすく、それを防止するために、
フランジ(7a)を必要以上に大きく製作したり、生じ
た間隙を適宜の手段で塞ぐ等の必要がある。
Also, distortion of the formwork (3) or anchor bolts (4)
) and manhole frame (7) due to an error in the temporary fixing position, the corner of the window hole (6) and the flange (7a) of the manhole frame (7) may
), and in order to prevent this,
It is necessary to make the flange (7a) larger than necessary, or to close the gap created by an appropriate means.

後者の方法によると、スラブ(1)を完成するためにコ
ンクリートを1回打設すればよいという利点があるが、
円筒状のマンホール用型枠の上端に。
The latter method has the advantage that concrete only needs to be poured once to complete the slab (1);
At the top of the cylindrical manhole formwork.

環状のマンホール枠を、打設するコンクリートが洩れな
いように、隙間なく突合せて仮止めすることが困難であ
る。
It is difficult to butt and temporarily fasten annular manhole frames together without leaving any gaps so that the poured concrete does not leak.

〔課題を解決するための手段〕[Means to solve the problem]

本発明は、下方に空所を有するコンクリート製のスラブ
を打設するのに際し、スラブの下面形成用のほぼ水平な
型枠の上面に、筒部の上端にマンホール蓋をはめ込む拡
大段部を形成したマンホール枠の下端を仮止めして、コ
ンクリートを打設し、コンクリート硬化後、型枠を取り
外すことにより、上述の課題の解決を図るとともに、こ
れに使用するマンホール枠を、筒部の上端に拡大段部を
備え。
When pouring a concrete slab with a hollow space below, the present invention forms an enlarged stepped portion on the upper surface of a nearly horizontal formwork for forming the lower surface of the slab, into which a manhole cover is fitted into the upper end of the cylindrical portion. The above problem can be solved by temporarily fixing the lower end of the manhole frame, pouring concrete, and removing the formwork after the concrete has hardened. Equipped with an enlarged step.

かつ下端に型枠への仮止め用のフランジを連設したもの
とすることにより、マンホールの施工を容易とし、従来
の技術が有する上記問題点を解決したものである。
Furthermore, by providing a flange for temporary fixing to the formwork at the lower end, construction of the manhole is facilitated, and the above-mentioned problems of the conventional technology are solved.

マンホール枠は、硝子繊維強化合成樹脂(以下FRPと
いう)製とするのがよい。
The manhole frame is preferably made of glass fiber reinforced synthetic resin (hereinafter referred to as FRP).

〔作 用〕[For production]

マンホール枠が、スラブ用のコンクリートの打設の際に
、マンホール用の型枠となるので、専用の型枠とその仮
止工事及び取り外し工事が不用となり、かつスラブをコ
ンクリートの1回の打設で完成しうるので、作業が簡素
化されるとともに、工期が短縮され、しかも、完成した
スラブのマンホールの内面は、体裁が良好である。
Since the manhole frame becomes the formwork for the manhole when concrete is poured for the slab, there is no need for a dedicated formwork and its temporary fixing and removal work, and the slab can be placed in one time when concrete is poured. This simplifies the work and shortens the construction period, and the inner surface of the completed slab manhole has a good appearance.

マンホール枠をFRP製とすれば、軽量となり、しかも
下端に設けたフランジにより、マンホール枠をスラブ用
型枠の上面に、打設したコンクリートが洩れないように
緊密に、しかも容易に仮止めすることができる。
If the manhole frame is made of FRP, it will be lightweight, and the flange provided at the lower end allows the manhole frame to be tightly and easily temporarily fixed to the top surface of the slab formwork to prevent poured concrete from leaking. Can be done.

〔実施例〕〔Example〕

第1図は、本発明を浄化槽のマンホール付スラブの成形
に適用した一実施例を示すもので、上述の従来例と同一
の部材には同一の符号を付して、説明を省略する。
FIG. 1 shows an embodiment in which the present invention is applied to the molding of a slab with a manhole for a septic tank, and the same members as in the above-mentioned conventional example are given the same reference numerals, and the explanation thereof will be omitted.

(21)は、本発明の円筒状のFRIJJマンホール枠
で、筒部(21a)の上端には、マンホール蓋(10)
をはめ込んで支持する拡大段部(21b)が形成され、
下端には、円形のフランジ(21e)が連設され、全高
は浄化槽のスラブ(1)と等しく定められている。
(21) is a cylindrical FRIJJ manhole frame of the present invention, and a manhole cover (10) is attached to the upper end of the cylindrical portion (21a).
An enlarged stepped portion (21b) is formed to fit and support the
A circular flange (21e) is connected to the lower end, and the overall height is set to be equal to the slab (1) of the septic tank.

このマンホール枠(21)のフランジ(21c)を、ス
ラブ(1)用の型枠(2)の上面要所に、釘(22)等
で仮止めして、コンクリート(5)をマンホール枠(2
1)の上端まで打設する。
The flange (21c) of this manhole frame (21) is temporarily fixed to the upper surface of the formwork (2) for the slab (1) with nails (22), etc., and the concrete (5) is attached to the manhole frame (2).
1) Pour to the top end.

コンクリート(5)の硬化後、型枠(2)を取り外せば
、マンホール付きのスラブ(])が完成する。
After the concrete (5) hardens, the formwork (2) is removed to complete the slab (]) with the manhole.

上述は、浄化槽に人が出入するだけの円形のマンホール
を族ニーする場合についてのものであるが、浄化槽によ
り、完成後内部に大型の機器を段間するため、大型の方
形のマンホールを必要とする場合がある。
The above is a case where a circular manhole is used to allow people to enter and exit the septic tank, but with a septic tank, a large rectangular manhole is required to install large equipment inside the septic tank after completion. There are cases where

このような場合には、例えば、第2図乃至第4図に示す
ように、平面形が方形の筒部(31a)の上端に、複数
に分割されたマンホール蓋(32)を並べて受支しうる
拡大段部(31b)が連設され、かつ下端に型枠(2)
への仮止め用の方形のフランジ(31e)が連設された
マンホール枠(31)を、第3図に示すように、断面形
が同一の複数のFRP製又は鋳鉄製の型材(33)を、
第4図に示すように、一方の型材(33)の端部に連設
した適宜の接続片(34) (35)と止めねじ(36
)とをもって互いに直角(又は必要に応じて直線状)に
接合することにより、方形枠状に形成し、これを型枠(
2)に載置して、フランジ(31c)を型枠(2)に釘
(37)等をもって適宜仮止めし、次いでコンクリート
(5)をマンホール枠(31)の上端まで打設する。
In such a case, for example, as shown in FIGS. 2 to 4, a manhole cover (32) divided into a plurality of parts is lined up and supported on the upper end of a cylindrical part (31a) having a rectangular planar shape. The enlarged step part (31b) is arranged in a row, and the formwork (2) is installed at the lower end.
As shown in Fig. 3, a manhole frame (31) with a rectangular flange (31e) for temporary fixing to the manhole frame (31) is attached to a plurality of FRP or cast iron mold members (33) with the same cross-sectional shape. ,
As shown in Fig. 4, appropriate connecting pieces (34) (35) and setscrews (36) are connected to the end of one of the shapes (33).
) are joined to each other at right angles (or in a straight line as necessary) to form a rectangular frame, which is then connected to the formwork (
2), the flange (31c) is temporarily fixed to the formwork (2) with nails (37), etc., and then concrete (5) is poured to the upper end of the manhole frame (31).

コンクリート(5)の打設前に、必要路じて、第3図に
示すように、マンホール枠(31)における互いに対向
する片の拡大段部(31b)fに、各辺と直角又は適宜
の傾斜角をなす補強杆(38) (39)の各端部を、
止めねしく40)をもって固着しておき、コンクリ−1
−(5)の硬化後、型枠(2)の取り外しとともに、補
強杆(38) (39)をマンホール枠(31)より除
去するのがよい。
Before pouring the concrete (5), as shown in Fig. 3, the enlarged stepped portions (31b) f of the mutually opposing pieces of the manhole frame (31) are made at right angles to each side or at appropriate angles. Each end of the reinforcing rod (38) (39) forming an inclined angle,
Fix the concrete with 40)
- After curing of (5), it is preferable to remove the reinforcing rods (38) (39) from the manhole frame (31) at the same time as removing the formwork (2).

このようにして、方形の大型のマンホールを備えるスラ
ブ(1)を形成することができる。
In this way, a slab (1) with a large rectangular manhole can be formed.

なお、本発明は、浄化槽や貯水槽用のマンホールの施工
だけでなく、下方に空所を有する各種の建築物のスラブ
にマンホールを施工する場合に適用することができる。
Note that the present invention can be applied not only to constructing manholes for septic tanks and water storage tanks, but also to constructing manholes in slabs of various buildings having voids below.

〔発明の効果〕〔Effect of the invention〕

本発明によると、スラブの下面形成用の型枠の上面に仮
止めしたマンホール枠が、コンクリート打設の際のマン
ホール用の型枠となるので、マンホール専用の型枠とそ
の仮止工事やその取り外し工事が不用になるとともに、
スラブをコンクリートの1回の打設で完成しうるので、
作業が簡素化されるとともに工期が短縮され、しかも完
成した浄化槽の内面は1体裁が良好である。
According to the present invention, the manhole frame temporarily fixed to the upper surface of the formwork for forming the lower surface of the slab becomes the formwork for the manhole during concrete pouring. In addition to eliminating the need for removal work,
Because the slab can be completed with a single pour of concrete,
The work is simplified, the construction period is shortened, and the inner surface of the completed septic tank looks good.

マンホール枠をFRPfgとすれば、軽量となり、しか
も下端に設けたフランジにより、スラブ用型枠の上面に
コンクリートを打設する際、洩れが生じないよう緊密に
、容易に仮止めすることができ、長期使用しても、汚水
により腐食することはない。
If the manhole frame is made of FRPfg, it will be lightweight, and the flange provided at the lower end allows it to be tightly and easily temporarily fixed to prevent leakage when concrete is poured on the top surface of the slab formwork. Even after long-term use, it will not be corroded by sewage.

【図面の簡単な説明】[Brief explanation of the drawing]

第1図は、本発明を、丸形マンホールの施工方法に適用
した一実施例を示すもので、コンクリートの打設時にお
ける浄化槽のマンホール部の縦断正面図、 第2図は、本発明を、角形マンホールの施工方法に適用
した別の実施例を示すもので、コンクリートの打設時に
おける浄化槽のマンホール部の縦断正面図、 第3図は、同じく、マンホール枠とマンホール蓋との分
解斜視図、 第4図は、同じく、マンホール枠の要部の拡大分解斜視
図、 第5図は、従来の方法により施工中の浄化槽のマンホー
ル部の縦断正面図。 第6図は、同じ(完成後の浄化槽のマンホール(1)ス
ラブ (4)アンカーボルト (6)窓孔 (7a)フランジ (8)ナツト (10)マンホール蓋 (21a) (31a)筒部 (21e) (31e)フランジ (32)マンホール蓋 (34) (35)接続片 (38) (39)補強杆 (2)(3)型枠 (5)コンクリート (7)マンホール枠 (7b)拡大段部 (9)モルタル (21)(31)マンホール枠 (21b) (31b)拡大段部 (22) (37)釘 (33)型材 (36)止めねじ (40)止めねじ 第5図 絶6図
FIG. 1 shows an embodiment in which the present invention is applied to a method for constructing a round manhole, and FIG. This shows another example applied to the construction method of a rectangular manhole, and Fig. 3 is a vertical cross-sectional front view of the manhole part of the septic tank during concrete pouring. FIG. 4 is an enlarged exploded perspective view of the main parts of the manhole frame, and FIG. 5 is a longitudinal sectional front view of the manhole portion of the septic tank being constructed using the conventional method. Figure 6 shows the same (manhole (1) slab (4) anchor bolt (6) window hole (7a) flange (8) nut (10) manhole cover (21a) (31a) cylindrical part (21e) of the septic tank after completion. ) (31e) Flange (32) Manhole cover (34) (35) Connection piece (38) (39) Reinforcement rod (2) (3) Formwork (5) Concrete (7) Manhole frame (7b) Expanded step ( 9) Mortar (21) (31) Manhole frame (21b) (31b) Expanded step (22) (37) Nail (33) Profile (36) Set screw (40) Set screw

Claims (3)

【特許請求の範囲】[Claims] (1)下方に空所を有するコンクリート製のスラブを打
設するのに際し、スラブの下面形成用のほぼ水平な型枠
の上面に、筒部の上端にマンホール蓋をはめ込む拡大段
部を形成したマンホール枠の下端を仮止めして、コンク
リートを打設し、コンクリート硬化後、型枠を取り外す
ことを特徴とするマンホール施工方法。
(1) When pouring a concrete slab with a hollow space at the bottom, an enlarged stepped section was formed on the upper surface of the almost horizontal formwork for forming the lower surface of the slab, into which a manhole cover was fitted into the upper end of the cylindrical section. A manhole construction method characterized by temporarily fixing the lower end of the manhole frame, pouring concrete, and removing the formwork after the concrete hardens.
(2)筒部の上端に、マンホール蓋をはめ込む拡大段部
を形成し、かつ下端に、型枠への仮止め用のフランジを
連設したマンホール枠。
(2) A manhole frame in which an enlarged stepped portion into which a manhole cover is fitted is formed at the upper end of the cylindrical portion, and a flange for temporary fixing to the formwork is provided at the lower end.
(3)硝子繊維強化合成樹脂よりなる請求項(2)記載
のマンホール枠。
(3) The manhole frame according to claim (2), which is made of a glass fiber reinforced synthetic resin.
JP1025825A 1989-02-06 1989-02-06 Manhole constructing method and frame Pending JPH02209530A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP1025825A JPH02209530A (en) 1989-02-06 1989-02-06 Manhole constructing method and frame

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP1025825A JPH02209530A (en) 1989-02-06 1989-02-06 Manhole constructing method and frame

Publications (1)

Publication Number Publication Date
JPH02209530A true JPH02209530A (en) 1990-08-21

Family

ID=12176635

Family Applications (1)

Application Number Title Priority Date Filing Date
JP1025825A Pending JPH02209530A (en) 1989-02-06 1989-02-06 Manhole constructing method and frame

Country Status (1)

Country Link
JP (1) JPH02209530A (en)

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6220524U (en) * 1985-07-22 1987-02-06
JPS6361451B2 (en) * 1983-05-09 1988-11-29

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6361451B2 (en) * 1983-05-09 1988-11-29
JPS6220524U (en) * 1985-07-22 1987-02-06

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