JP2598403B2 - How to attach scaffolding brackets for underground structures - Google Patents
How to attach scaffolding brackets for underground structuresInfo
- Publication number
- JP2598403B2 JP2598403B2 JP62086533A JP8653387A JP2598403B2 JP 2598403 B2 JP2598403 B2 JP 2598403B2 JP 62086533 A JP62086533 A JP 62086533A JP 8653387 A JP8653387 A JP 8653387A JP 2598403 B2 JP2598403 B2 JP 2598403B2
- Authority
- JP
- Japan
- Prior art keywords
- scaffolding
- plate
- shaped
- side wall
- shaped form
- 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
Landscapes
- Underground Structures, Protecting, Testing And Restoring Foundations (AREA)
Description
【発明の詳細な説明】 〔産業上の利用分野〕 本発明は、設置された地下構造物の周側壁に足場金具
を植設する作業を迅速且つ確実に行うことを可能とした
足場金具の取付け方法に関する。DETAILED DESCRIPTION OF THE INVENTION [Industrial Application Field] The present invention relates to mounting of a scaffolding metal fitting which enables quick and reliable work of planting a scaffolding metal fitting on a peripheral side wall of an installed underground structure. About the method.
マンホール等の地下構造物の周側壁に植設される足場
金具は、第４図に示すように、厚い周側壁を貫いて、強
固に固定されている。たとえば、全長Ｌ＝250mmの足場
金具ｂの先端側ｃを厚さＴ＝70mm程度の周側壁ａの外周
面から更に長さｌ＝80mmだけ地中ｄに突出させた状態
で、足場金具ｂを周側壁ａに取り付けている。これによ
って、足場金具ｂの機械的な強度は充分なものとなる。
しかし、内部の高温，多湿に加え、汚水から発生する腐
食性気体等により、足場金具ｂの腐食の進行が激しく、
作業者の安全性確保のため、足場金具ｄを定期的に取り
替えることが必要となる。As shown in FIG. 4, the scaffolding metal fittings planted on the peripheral side wall of an underground structure such as a manhole penetrates the thick peripheral side wall and is firmly fixed. For example, with the tip side c of the scaffolding metal b having a total length L = 250 mm protruding further from the outer peripheral surface of the peripheral side wall a having a thickness T of about 70 mm into the underground d by a length l = 80 mm, the scaffolding metal b is It is attached to the peripheral side wall a. As a result, the mechanical strength of the scaffolding bracket b becomes sufficient.
However, due to corrosive gas generated from sewage in addition to the internal high temperature and high humidity, the corrosion of the scaffolding metal b is intense,
In order to ensure the safety of the worker, it is necessary to periodically replace the scaffolding bracket d.
従来の取付け方法によるとき、周側壁ａに形成した空
洞部分に足場金具を挿入し、これを手で支えながら周囲
の空間部分に硬練りの普通セメントモルタルを少量ずつ
充填していた。According to the conventional mounting method, a scaffold is inserted into a hollow portion formed in the peripheral side wall a, and the surrounding space is filled with a hardened ordinary cement mortar little by little while supporting it by hand.
〔発明が解決しようとする問題点〕 硬練りのセメントモルタルを使用することによって、
モルタルが周側壁ａ内面に沿って流れ落ちることは防止
できる。しかし、先に充填したモルタルと次に充填する
モルタルとの間に隙間ができやすい。この隙間は、足場
金具ｂ取付け作業終了後で漏水の原因となるものであ
る。また、この隙間により、取り付けた足場金具ｂの設
置強度も劣るものとなる。これらの欠点を解消するため
には、足場金具ｂの先端側ｃ位置まで、モルタルを完全
に充填することが必要となる。しかし、このようなモル
タルの充填は、かなりの手間及び時間を消費する。その
ため、一日に取付けできる足場金具の本数は５〜６本が
限度であり、作業能率の悪いものであった。[Problems to be solved by the invention] By using hardened cement mortar,
It is possible to prevent the mortar from flowing down along the inner surface of the peripheral side wall a. However, a gap is easily formed between the mortar charged first and the mortar charged next. This gap causes water leakage after the mounting work of the scaffolding bracket b is completed. Further, due to this gap, the installation strength of the attached scaffolding bracket b is also deteriorated. In order to eliminate these drawbacks, it is necessary to completely fill the mortar up to the position c on the tip side of the scaffolding fitting b. However, such mortar filling consumes considerable labor and time. For this reason, the number of scaffolding brackets that can be attached in one day is limited to 5 to 6, and the work efficiency is poor.
そこで、本発明は、足場金具の取付け作業を迅速化
し、且つ完成後の漏水防止効果及び設置強度に優れる地
下構造物用足場金具の取付け方法を提供することを目的
とする。Therefore, an object of the present invention is to provide a method of mounting a scaffolding metal fitting for an underground structure, which speeds up the mounting work of the scaffolding metal, and has an excellent effect of preventing leakage after completion and excellent installation strength.
本発明の地下構造物用足場金具の取付け方法は、その
目的を達成するため、設置された地下構造物の周側壁に
形成した足場金具を挿入し、該足場金具を上下から挟持
する一対の板状型枠に挿通した螺子杆を締め付けること
により前記板状型枠を前記周側壁の内周面に押圧し、前
記板状型枠により閉鎖された前記空洞部分に無収縮性の
急硬性セメントを注入することを特徴とする。In order to achieve the object, a method of mounting a scaffolding metal fitting for an underground structure according to the present invention is to insert a scaffolding metal fitting formed on a peripheral side wall of an installed underground structure, and a pair of plates for holding the scaffolding metal fitting from above and below. By pressing the screw rod inserted through the plate-shaped form, the plate-shaped form is pressed against the inner peripheral surface of the peripheral side wall, and a non-shrinkable rapid-hardening cement is applied to the hollow portion closed by the plate-shaped form. It is characterized by injection.
以下、図面を参照しながら、実施例により本発明の特
徴を具体的に説明する。Hereinafter, the features of the present invention will be described in detail with reference to the drawings.
第１図は、本実施例において、地下構造物の周側壁に
新たな足場金具を取り付けた状態を示す。FIG. 1 shows a state in which a new scaffolding metal fitting is attached to the peripheral side wall of the underground structure in this embodiment.
まず、既設の足場金具の周囲にある周側壁１のコンク
リートを約250mm×100mmの矩形状に切断するとともに、
地中10を掘削することにより老朽化した足場金具を撤去
し、空洞部分２を形成する。この空洞部分２に、新たな
足場金具３を挿入する。そして、この足場金具３を上下
部板状型枠4a,4bとからなる板状型枠４で上下から挟持
し、この板状型枠４を螺子杆５で固定する。First, while cutting the concrete of the peripheral side wall 1 around the existing scaffolding bracket into a rectangular shape of about 250 mm × 100 mm,
Aged scaffolding hardware is removed by excavating the underground 10 to form a hollow part 2. A new scaffolding fitting 3 is inserted into the hollow portion 2. Then, this scaffolding metal fitting 3 is sandwiched from above and below by a plate-shaped form 4 composed of upper and lower plate-shaped forms 4a and 4b, and the plate-shaped form 4 is fixed by a screw rod 5.
第２図は、板状型枠４を示す斜視図である。この板状
型枠４は、上部板状型枠4aと下部板状型枠4bとからな
る。上部板状型枠4aの下端及び下部板状型枠4bの上端の
それぞれに、Ｕ字状切欠部6a,6bが２ヶ所ずつ設けられ
ている。これらＵ字状切欠部6a−6a,6b−6bの間隔は、
足場金具３の両脚部間の距離に等しく設計されている。
すなわち、上部板状型枠4a及び下部板状型枠4bを重ね合
わせることによって、足場金具３の両脚部を挟持する支
持孔が形成される。FIG. 2 is a perspective view showing the plate-shaped form 4. The plate-shaped form 4 includes an upper plate-shaped form 4a and a lower plate-shaped form 4b. Two U-shaped cutouts 6a and 6b are provided at the lower end of the upper plate-shaped frame 4a and the upper end of the lower plate-shaped frame 4b, respectively. The interval between these U-shaped notches 6a-6a, 6b-6b is
It is designed to be equal to the distance between the two legs of the scaffolding fitting 3.
That is, by overlapping the upper plate-shaped form 4a and the lower plate-shaped form 4b, a support hole for sandwiching both legs of the scaffolding fitting 3 is formed.
上部板状型枠4a及び下部板状型枠4bには、Ｕ字状切欠
部6a−6a,6b−6bの中間にあたる位置に、孔部6c,6dが穿
設されている。これら孔部6c,6dは、足場金具３の両脚
部をＵ字状切欠部6a−6a,6b−6bで挟持するために、上
部板状型枠4a及び下部板状型枠4bを重ね合わせたときに
互いに一致して、螺子杆５を挿通する挿通孔となる。ま
た、下部板状型枠4bの下端近傍には、無収縮性の急硬性
セメント７を注入する注入管８が接続されている。他
方、上部板状型枠4aの上端近傍には、空洞部分２内部の
空気を排出する排気管９が接続されている。この排気管
９の先端部は、上方に向けて曲げられていることが好ま
しい。これによって、空洞部分２に急硬性セメント７を
充填したときに空隙が生じないように、空気の排出が完
全に行われる。Holes 6c, 6d are formed in the upper plate-shaped form 4a and the lower plate-shaped form 4b at positions intermediate the U-shaped cutouts 6a-6a, 6b-6b. These holes 6c, 6d are formed by overlapping the upper plate-shaped form 4a and the lower plate-shaped form 4b in order to clamp both legs of the scaffolding bracket 3 with the U-shaped cutouts 6a-6a, 6b-6b. At times, they coincide with each other to form an insertion hole through which the screw rod 5 is inserted. An injection pipe 8 for injecting non-shrinkable rapid-hardening cement 7 is connected near the lower end of the lower plate-shaped form 4b. On the other hand, an exhaust pipe 9 for discharging air inside the hollow portion 2 is connected near the upper end of the upper plate-shaped form 4a. The distal end of the exhaust pipe 9 is preferably bent upward. As a result, air is completely discharged so that voids do not occur when the rapid-hardening cement 7 is filled in the hollow portion 2.
これら上部板状型枠4a及び下部板状型枠4bは、透明の
合成樹脂板等で製作することが好ましい。これによっ
て、急硬性セメント７の注入状況を確認しながら注入作
業を行うとができるため、過剰量の急硬性セメント７を
空洞部分２に注入することが防止される。It is preferable that the upper plate-shaped frame 4a and the lower plate-shaped frame 4b are made of a transparent synthetic resin plate or the like. Thus, the injection operation can be performed while checking the injection status of the rapid-hardening cement 7, so that an excessive amount of the rapid-hardening cement 7 is prevented from being injected into the hollow portion 2.
第３図は、螺子杆５を示す斜視図である。螺子杆５の
先端部5aは、螺子杆５を空洞部分２内に挿入した後、掘
削した地中10内で回転させることにより、周側壁１の外
周面に係止するように軸部5bから直角方向に伸延したＴ
字状になっている。或いは、螺子杆５の先端部5aを直線
状で充分に長くし、地中10に打ち込んだときアンカーと
して働くようにしても良い。他方、螺子杆５の基端側に
は、螺子山5cが設けられている。この螺子山5cは、上部
板状型枠4a及び下部板状型枠4bの孔部6c,6dに螺子杆５
の軸部5bを挿通した後、ナット5dを締め付けることによ
って、板状型枠４を固定する働きをもつ。FIG. 3 is a perspective view showing the screw rod 5. The tip 5a of the screw rod 5 is inserted into the hollow portion 2 and then rotated in the excavated ground 10 so that the tip 5a of the screw rod 5 is locked to the outer peripheral surface of the peripheral side wall 1 from the shaft 5b. T extended at right angles
It is shaped like a letter. Alternatively, the distal end portion 5a of the screw rod 5 may be made sufficiently long in a straight line so as to function as an anchor when it is driven into the underground 10. On the other hand, a screw thread 5c is provided on the base end side of the screw rod 5. The screw thread 5c is inserted into the holes 6c and 6d of the upper plate-shaped form 4a and the lower plate-shaped form 4b.
After the shaft portion 5b is inserted, the nut 5d is tightened to fix the plate-shaped formwork 4.
なお、このナット5dに替えて蝶ナットを使用すること
もできる。この場合、作業完了後に板状型枠４を取り外
す作業が簡単になる。Note that a wing nut can be used instead of the nut 5d. In this case, the work of removing the plate form 4 after the work is completed is simplified.
次いで、地下構造物の足場金具の取替え手順について
説明する。Next, a procedure for replacing scaffolding hardware of the underground structure will be described.
まず、既設の足場金具の周囲にある周側壁１のコンク
リートを約250×100mm程度の矩形状に切断するととも
に、地中10を掘削することにより、老朽化した足場金具
を撤去する。First, the concrete on the peripheral side wall 1 around the existing scaffolding metal is cut into a rectangular shape of about 250 × 100 mm, and the underground scaffolding metal is excavated to remove the deteriorated scaffolding metal.
そして、コンクリートを除去した後に生じた空洞部分
２に、新たな足場金具３の脚部を所定の埋込み長さだ挿
入する。この埋込み長さは、第４図の従来法と同様にＴ
＋ｌ＝150mm程度とするのが普通である。足場金具３の
挿入に先立って、足場金具３の両脚部を上部板状型枠4a
及び下部板状型枠4bのそれぞれに設けたＵ字状切欠部6
a,6bで上下方向から挟持することにより、重なった上部
板状型枠4a及び下部板状型枠4bの孔部6c,6dに第１図左
側から螺子杆５を挿通しておく。そして、足場金具３の
脚部が所定量だけ埋め込まれた後、螺子杆５を掘削した
地中10内で回転させて、その先端部5aを周側壁１の外周
面に係合させる。次いで、重ね合わせた上部板状型枠4a
及び下部板状型枠4bの孔部6c,6dから突出した螺子杆５
の基端側にある螺子山5cにナット5dを締め付ける。この
締付けによって、周側壁１の外周面に対して螺子杆５の
先端部5aが強固に押圧され、上部板状型枠4a及び下部板
状型枠4bの固定が確実に行われる。Then, the leg portion of the new scaffolding metal fitting 3 is inserted into the hollow portion 2 formed after the concrete is removed by a predetermined embedding length. The embedding length is set to T as in the conventional method shown in FIG.
Usually, + l = about 150 mm. Prior to the insertion of the scaffolding bracket 3, both legs of the scaffolding bracket 3 are connected to the upper plate form 4a.
And a U-shaped notch 6 provided in each of the lower plate form 4b
The screw rod 5 is inserted from the left side in FIG. 1 into the holes 6c and 6d of the overlapped upper plate-shaped frame 4a and lower plate-shaped frame 4b by being sandwiched between the upper and lower plates a and 6b. Then, after the leg portion of the scaffolding metal fitting 3 is embedded by a predetermined amount, the screw rod 5 is rotated in the excavated underground 10 so that the tip 5a is engaged with the outer peripheral surface of the peripheral side wall 1. Next, the superposed upper plate-shaped form 4a
And a screw rod 5 protruding from the holes 6c, 6d of the lower plate-shaped form 4b.
Tighten the nut 5d to the screw thread 5c on the base end side. By this tightening, the distal end portion 5a of the screw rod 5 is firmly pressed against the outer peripheral surface of the peripheral side wall 1, and the upper plate-shaped frame 4a and the lower plate-shaped frame 4b are securely fixed.
このようにして、足場金具３を挿入した空洞部分２の
前面開口部分が閉鎖される。この閉鎖された空洞部分２
に、下部板状型枠4bの注入管８から無収縮性の急硬性セ
メント７を注入する。この急硬性セメント７の注入は、
上部板状型枠4aの排気管９から急硬性セメント７が溢れ
出した時点で終了する。そして、注入管８を栓又は粘着
テープ等によって閉塞する。このとき、板状型枠４を固
定する螺子杆５はその先端部5aが周側壁１の外周面に押
圧されているので、板状型枠４がはずれることがない。
したがって、無収縮性の急硬性セメント７の漏出を防止
することができる。In this manner, the front opening of the cavity 2 into which the scaffolding metal fitting 3 is inserted is closed. This closed cavity 2
Then, the non-shrinkable rapid-hardening cement 7 is injected from the injection pipe 8 of the lower plate-shaped form 4b. The injection of this quick-hardening cement 7
The process ends when the rapid-hardening cement 7 overflows from the exhaust pipe 9 of the upper plate-shaped form 4a. Then, the injection tube 8 is closed with a stopper or an adhesive tape. At this time, since the tip 5a of the screw rod 5 for fixing the plate-shaped form 4 is pressed against the outer peripheral surface of the peripheral side wall 1, the plate-shaped form 4 does not come off.
Therefore, leakage of the non-shrinkable rapid-hardening cement 7 can be prevented.
ここで使用する無収縮性の急硬性セメント７として
は、カルシュウム・サルフォ・アルミネート系膨張材を
含有するものが挙げられる。そして、注入条件，注入
量，経済性等を勘案して、骨材の有無，粒度を決定し、
ペースト，モルタル，コンクリートの各状態の中から適
切な状態のものを使用することができる。Examples of the non-shrinkable rapid-hardening cement 7 used herein include those containing a calcium-sulfo-aluminate-based expanding material. Then, considering the injection conditions, injection amount, economy, etc., the presence or absence of the aggregate and the particle size are determined.
An appropriate state can be used from among paste, mortar, and concrete.
急硬性セメント７が硬化した後、ナット5dを螺子杆５
の螺子山5cから取り外し、板状型枠４を除去する。そし
て、周側壁１の内周面から突出した螺子杆５を切断し
て、足場金具３の取替え作業を完了する。硬化した急硬
性セメント７内に残存する螺子杆５は、配筋として働
き、周側壁１の取替え部近傍の強度を更に向上させる。After the hardened cement 7 has hardened, the nut 5d is
And remove the plate-shaped form 4 from the screw thread 5c. Then, the screw rod 5 protruding from the inner peripheral surface of the peripheral side wall 1 is cut, and the replacement work of the scaffolding bracket 3 is completed. The screw rod 5 remaining in the hardened rapid-hardening cement 7 functions as a reinforcing bar, and further improves the strength near the replacement portion of the peripheral side wall 1.
以上、本発明の実施例に基づいて足場金具の取替え作
業について説明したが、本発明では、設置した地下構造
物に後付けで新規に取付けることもできる。As described above, the replacement work of the scaffolding metal fitting has been described based on the embodiment of the present invention.
以上に説明したように、本発明の取付け方法によると
き、足場金具を挟持する板状型枠の取付けを容易に行う
ことができ、また板状型枠の使用によって空洞部分の開
口が閉鎖されるため、無収縮性の急硬性セメントを注入
方式で充填できるため、足場金具の取付け作業が迅速且
つ確実なものとなる。更に、硬化したセメント内に残存
する螺子杆は、配筋として働くため、周側壁の取付け部
周辺の強度も向上する。As described above, according to the mounting method of the present invention, it is possible to easily mount the plate-like formwork for holding the scaffolding metal fitting, and the use of the plate-like formwork closes the opening of the hollow portion. Therefore, since the non-shrinkable rapid-hardening cement can be filled by the injection method, the work of attaching the scaffolding metal can be performed quickly and reliably. Further, the screw rod remaining in the hardened cement acts as a reinforcing bar, so that the strength around the mounting portion on the peripheral side wall is also improved.
第１図は本発明実施例における足場金具の取替え作業状
態を示す断面図、第２図は板状型枠の斜視図、第３図は
螺子杆の斜視図である。また、第４図は、足場金具の設
置状態を示す。 1:周側壁、2:空洞部分 3:足場金具、4:板状型枠 4a:上部板状型枠、4b:下部板状型枠 5:螺子杆、5a:螺子杆の先端部 5b:螺子杆の軸部、5c:螺子杆の螺子山 5d:ナット、6a,6b:U字状切欠部 6c,6d:孔部、7:急硬性セメント 8:注入管、9:排気管 10:地中、a:周側壁 b:足場金具、c:足金具の先端側 d:地中FIG. 1 is a cross-sectional view showing a state of replacing a scaffolding fitting in the embodiment of the present invention, FIG. 2 is a perspective view of a plate-shaped form, and FIG. 3 is a perspective view of a screw rod. FIG. 4 shows an installation state of the scaffolding fitting. 1: peripheral side wall, 2: hollow part 3: scaffolding bracket, 4: plate-shaped form 4a: upper plate-shaped form, 4b: lower plate-shaped form 5: screw rod, 5a: tip of screw rod 5b: screw Shaft of rod, 5c: Thread of threaded rod 5d: Nut, 6a, 6b: U-shaped notch 6c, 6d: Hole, 7: Rapid cement 8: Injection pipe, 9: Exhaust pipe 10: Underground , A: Peripheral wall b: Scaffolding bracket, c: Tip side of footing bracket d: Underground
Claims (1)
空洞部分に足場金具を挿入し、該足場金具を上下から挟
持する一対の板状型枠に挿通した螺子杆を締め付けるこ
とにより前記板状型枠を前記周側壁の内周面に押圧し、
前記板状型枠により閉鎖された前記空洞部分に無収縮性
の急硬性セメントを注入することを特徴とする地下構造
物用足場金具の取付け方法。1. A scaffold fitting is inserted into a hollow portion formed on a peripheral side wall of an installed underground structure, and a screw rod inserted through a pair of plate-shaped forms that clamps the scaffold from above and below is tightened. Pressing a plate-shaped form against the inner peripheral surface of the peripheral side wall,
A method of mounting a scaffolding metal fitting for an underground structure, characterized by injecting non-shrinkable rapid-hardening cement into the hollow part closed by the plate-shaped formwork.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62086533A JP2598403B2 (en) | 1987-04-07 | 1987-04-07 | How to attach scaffolding brackets for underground structures |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62086533A JP2598403B2 (en) | 1987-04-07 | 1987-04-07 | How to attach scaffolding brackets for underground structures |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63251571A JPS63251571A (en) | 1988-10-19 |
| JP2598403B2 true JP2598403B2 (en) | 1997-04-09 |
Family
ID=13889636
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62086533A Expired - Lifetime JP2598403B2 (en) | 1987-04-07 | 1987-04-07 | How to attach scaffolding brackets for underground structures |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2598403B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013167131A (en) * | 2012-02-17 | 2013-08-29 | Sekisui Chem Co Ltd | Column material connection method, building unit, column material connection structure, and joint pin setting |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0714556Y2 (en) * | 1989-10-05 | 1995-04-10 | コロナ技建株式会社 | Scaffold connection strengthening hardware and scaffold connection device |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5524052Y2 (en) * | 1976-06-16 | 1980-06-09 | ||
| JPS5369509U (en) * | 1976-11-15 | 1978-06-10 |
-
1987
- 1987-04-07 JP JP62086533A patent/JP2598403B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2013167131A (en) * | 2012-02-17 | 2013-08-29 | Sekisui Chem Co Ltd | Column material connection method, building unit, column material connection structure, and joint pin setting |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63251571A (en) | 1988-10-19 |
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