JPH0497064A - Reinforcing steel rod in reinforced concrete structure - Google Patents
Reinforcing steel rod in reinforced concrete structureInfo
- Publication number
- JPH0497064A JPH0497064A JP21373290A JP21373290A JPH0497064A JP H0497064 A JPH0497064 A JP H0497064A JP 21373290 A JP21373290 A JP 21373290A JP 21373290 A JP21373290 A JP 21373290A JP H0497064 A JPH0497064 A JP H0497064A
- Authority
- JP
- Japan
- Prior art keywords
- reinforcing bars
- steel
- reinforced concrete
- bars
- reinforcing
- 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
Links
- 239000011150 reinforced concrete Substances 0.000 title claims abstract description 21
- 229910001294 Reinforcing steel Inorganic materials 0.000 title abstract description 4
- 230000003014 reinforcing effect Effects 0.000 claims abstract description 60
- 229910000831 Steel Inorganic materials 0.000 claims abstract description 11
- 239000010959 steel Substances 0.000 claims abstract description 11
- 239000012777 electrically insulating material Substances 0.000 claims description 6
- 239000000463 material Substances 0.000 claims description 5
- 229910000617 Mangalloy Inorganic materials 0.000 abstract description 6
- 239000011810 insulating material Substances 0.000 abstract description 5
- 239000000696 magnetic material Substances 0.000 abstract description 5
- 239000003822 epoxy resin Substances 0.000 abstract description 4
- 229920000647 polyepoxide Polymers 0.000 abstract description 4
- 229910001220 stainless steel Inorganic materials 0.000 abstract description 4
- 239000010935 stainless steel Substances 0.000 abstract description 4
- 230000007797 corrosion Effects 0.000 abstract description 3
- 238000005260 corrosion Methods 0.000 abstract description 3
- 239000004567 concrete Substances 0.000 description 9
- 230000002787 reinforcement Effects 0.000 description 9
- BZHJMEDXRYGGRV-UHFFFAOYSA-N Vinyl chloride Chemical compound ClC=C BZHJMEDXRYGGRV-UHFFFAOYSA-N 0.000 description 2
- 238000010521 absorption reaction Methods 0.000 description 2
- 125000000129 anionic group Chemical group 0.000 description 2
- 229920006318 anionic polymer Polymers 0.000 description 2
- 229920006317 cationic polymer Polymers 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 238000010292 electrical insulation Methods 0.000 description 2
- 230000004927 fusion Effects 0.000 description 2
- 239000012212 insulator Substances 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 229920003023 plastic Polymers 0.000 description 2
- 239000011414 polymer cement Substances 0.000 description 2
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 230000000593 degrading effect Effects 0.000 description 1
- 238000003487 electrochemical reaction Methods 0.000 description 1
- 238000000034 method Methods 0.000 description 1
- 239000000615 nonconductor Substances 0.000 description 1
- 239000013589 supplement Substances 0.000 description 1
Abstract
Description
【発明の詳細な説明】
〈産業上の利用分野〉
本発明は、鉄筋コンクリート構造物の鉄筋、特に、磁界
及び電位の変化によって電気的影響を受ける施設の鉄筋
コンクリート構造物中に内包される鉄筋に関する。DETAILED DESCRIPTION OF THE INVENTION <Industrial Application Field> The present invention relates to reinforcing bars for reinforced concrete structures, and in particular to reinforcing bars included in reinforced concrete structures of facilities that are electrically affected by magnetic fields and changes in potential.
〈従来の技術〉
コンクリート構造物の中には、その引張り強度を補うた
めに鉄筋を内包配設して鉄筋コンクリート構造物を形成
する。ここで、鉄筋は導電性であるため、電位差が発生
すると配設した鉄筋を回路として鉄筋コンクリート構造
物中に電流が流れ、施設内に設置した計測機器等に電気
的障害を引き起し、また電流の作用により鉄筋が電気化
学反応を起こして腐食する。<Prior Art> In order to supplement the tensile strength of a concrete structure, reinforcing bars are disposed within the structure to form a reinforced concrete structure. Here, since reinforcing bars are conductive, when a potential difference occurs, current flows through the reinforced concrete structure using the installed reinforcing bars as a circuit, causing electrical disturbances to measuring equipment installed within the facility, and causing electrical current to flow through the reinforced concrete structure. The reinforcing steel undergoes an electrochemical reaction and corrodes.
これらの対策としては、第４図（イ）及び（ロ）に示す
ように鉄筋４０の交差部分（イ）やランプ部分（ロ）に
電気絶縁物４１を挾み込んで鉄筋４０を組むことにより
鉄筋４０相互の接触を無くし、これによって鉄筋４０が
電気的回路を作らぬよう工夫されていた。As a countermeasure for these, as shown in Fig. 4 (a) and (b), the reinforcing bars 40 are assembled by inserting electrical insulators 41 into the intersection parts (a) and lamp parts (b) of the reinforcing bars 40. The reinforcing bars 40 were devised to eliminate contact with each other, thereby preventing the reinforcing bars 40 from forming an electrical circuit.
〈発明が解決しようとする課題〉
しかしながら、上記従来の配筋構造では１例えば核融合
炉建屋やリニアモーターカー施設等の磁界変化を強く受
ける施設の構造物においては２施設特有の電流、すなわ
ち磁界変動に伴い鉄筋４０中に発生する誘導電流や、電
気的に半導体であるコンクリートを通過して鉄筋４０に
至りこれを腐食させる電流、例えば地中を流れる迷送電
流に対しては、それらによる不都合に対応できず信頼性
の高い電気絶縁性を得ることができないという問題が残
る。<Problems to be Solved by the Invention> However, with the above-mentioned conventional reinforcement structure, 1. For example, in structures of facilities that are subject to strong changes in magnetic fields, such as nuclear fusion reactor buildings and linear motor car facilities, 2. Induced currents that occur in the reinforcing bars 40 due to fluctuations, currents that pass through the electrically semiconducting concrete and reach the reinforcing bars 40 and corrode them, such as stray currents flowing underground, are inconvenient due to these. However, the problem remains that highly reliable electrical insulation cannot be obtained.
また、電気＃＠縁物４１を挾むといった従来の配筋構造
では、鉄筋４０の組立て作業に手間がかかるとともに、
コンクリートの打設までの間、又は打設中に上記電気絶
縁部４１が外れる恐れがあり、このため作業能率が低下
するといった施工上好ましくない問題も生じる。In addition, in the conventional reinforcement structure in which electric #@edges 41 are sandwiched, it takes time and effort to assemble the reinforcing bars 40, and
There is a risk that the electrical insulating portion 41 may come off before or during concrete pouring, resulting in unfavorable construction problems such as reduced work efficiency.
そこで、本発明は上記各問題点を同時に解消すべくなさ
れたもので、その目的は、磁界および電位変化によって
電気的影響、すなわち発生する電流による電気的障害や
鉄筋の腐食を受けやすい施設の構造物においても、磁界
変動に伴う誘導電流の発生をおさえかつコンクリートを
通過する電流に対し十分な電気絶縁性を有しく以下電気
的健全性と定義する）、その組立て作業が煩雑ではなく
かつ作業能率を低下させることのない鉄筋コンクノート
構造物の鉄筋を提供せんとする。Therefore, the present invention was devised to solve the above-mentioned problems at the same time.The purpose of the present invention is to solve the above-mentioned problems at the same time. (hereinafter defined as "electrical soundness"), which suppresses the generation of induced current due to magnetic field fluctuations and has sufficient electrical insulation against the current passing through concrete (hereinafter defined as "electrical soundness"), and whose assembly work is not complicated and work efficiently. The aim is to provide rebar for reinforced concrete structures without degrading the structure.
〈課題を解決するための手段〉
本発明は、上記目的に鑑みてなされたものであり、その
要旨は、鉄筋コンクリート構造物中に配設するための鉄
筋が高マンガン鋼、ステンレス鋼等の非磁性材により作
成した鋼棒に、エポキシ樹脂、アニオン系もしくはカチ
オン系ポリマーセメント等の電気絶縁材を被覆してなる
鉄筋コンクリート構造物の鉄筋にある。<Means for Solving the Problems> The present invention has been made in view of the above object, and its gist is that reinforcing bars to be installed in reinforced concrete structures are made of non-magnetic material such as high manganese steel or stainless steel. Reinforcing bars for reinforced concrete structures are made by covering steel rods made of aluminum with an electrical insulating material such as epoxy resin, anionic or cationic polymer cement.
〈作用〉
本発明では、鉄筋コンクリート構造物中の鉄筋を非磁性
材により作成することにより、磁界変動に伴う鉄筋内部
における誘導電流の発生をおさえる。また、鉄筋全面を
電気絶縁材で被覆しているので、コンクリートの電気的
半導性により外部から侵入する電流に対して鉄筋を絶縁
する。また、この鉄筋を利用した配筋構造は、予め電気
Ｉｎ材の被覆を施した電気絶縁鉄筋により組立てるので
、手間のかかる作業、例えば鉄筋の交差部やラップ部に
特別な絶縁物を介在させる等の作業を排除して１通常の
鉄筋の組立て作業と同様の方法で容易にその作業を行な
うことができる。<Operation> In the present invention, the reinforcing bars in a reinforced concrete structure are made of a non-magnetic material to suppress the generation of induced current inside the reinforcing bars due to magnetic field fluctuations. Furthermore, since the entire surface of the reinforcing bars is covered with an electrical insulating material, the electrical semiconductivity of concrete insulates the reinforcing bars from electric currents that enter from the outside. In addition, the reinforcement structure using reinforcing bars is assembled using electrically insulating reinforcing bars that have been coated with electrical In material in advance, which requires time-consuming work such as interposing special insulators at the intersections and laps of the reinforcing bars. 1.The work can be easily carried out in the same manner as the normal reinforcing bar assembly work.
〈実施例〉
次に、本発明の実施例を、添付図面を基に詳細に説明す
る。<Example> Next, an example of the present invention will be described in detail based on the accompanying drawings.
第１図は、本発明による鉄筋コンクリート構造物の鉄筋
を配筋した構造物の一例を概略的に示す。FIG. 1 schematically shows an example of a structure in which reinforcing bars of a reinforced concrete structure according to the present invention are arranged.
鉄筋コンクリート機造物１０の内部番こは、主鉄筋１１
と配力鉄筋１２が配設され、これらの鉄筋はいずｔも第
２図に示す電気絶縁鉄筋２ｏを所定の長さ及び形状に加
工したものである。電気絶縁鉄筋２０は、高マンガン鋼
、ステンレス鋼等の非磁性材により作成した非磁性鋼棒
２１に、エポキシ樹脂、アニオン系もしくはカチオン系
ポリマーセメント等の電気絶縁材２２を被覆したもので
ある。The internal number of the reinforced concrete machine structure 10 is the main reinforcing bar 11
and distribution reinforcing bars 12 are arranged, and these reinforcing bars are all electrically insulating reinforcing bars 2o shown in FIG. 2 processed into a predetermined length and shape. The electrically insulating reinforcing bar 20 is a non-magnetic steel rod 21 made of a non-magnetic material such as high manganese steel or stainless steel and coated with an electrically insulating material 22 such as epoxy resin, anionic or cationic polymer cement.
また、主鉄筋１１と配力鉄筋１２との結束は、プラスチ
ック、塩化ビニール等の電気Ｍ！縁性の材料で作成した
絶縁クリップ１３を用い、主鉄筋１］と配力鉄筋１２と
が重なりあう箇所すなわち結束箇所を鉄筋相互が弛緩し
ないよう固定することにより行なう。なお、Ｍ縁りリッ
プ１３の形状は公知のものなので細述しない。またこの
結束は、第３図（イ）に示すように、前記結束箇所をプ
ラスチック、塩化ビニール等の電気絶縁性の材料からな
る結束線３０を用いて縛り付けることにより行うことも
できる。また、鉄筋軸方向の継手、例えば配力鉄筋１２
の継手は、高マンガン鋼、ステンレス鋼等の材料から作
成したスリーブ継手、ネジ式継手等の絶縁継手１４を用
いて行なうほか、鉄筋の径が比較的小さい場合は、第３
図（ロ）に示すように、配力鉄筋１２を所定長さ軸方向
にラップさせ、前記電気絶縁性の材料からなる結束線３
０を用いて縛り付けることにより行うこともできる。Furthermore, the main reinforcing bars 11 and distribution reinforcing bars 12 are bound together using electric M! such as plastic or vinyl chloride. This is done by using an insulating clip 13 made of a material that is flexible to fix the locations where the main reinforcing bars 1 and distribution reinforcing bars 12 overlap, that is, the binding locations, so that the reinforcing bars do not loosen from each other. Note that the shape of the M-edge lip 13 is well known and will not be described in detail. Moreover, this binding can also be performed by tying the binding portion using a binding wire 30 made of an electrically insulating material such as plastic or vinyl chloride, as shown in FIG. 3(A). In addition, joints in the reinforcing bar axial direction, for example, distribution reinforcing bars 12
These joints are made using insulated joints 14 such as sleeve joints and threaded joints made of materials such as high manganese steel and stainless steel.In addition, when the diameter of the reinforcing bar is relatively small, a third joint is used.
As shown in FIG.
This can also be done by binding using 0.
かかる構成の配筋構造を有する鉄筋コンクリート構造物
では、核融合炉建屋やリニアモーターカー施設等の磁界
及び電位の変化によって電気的影響を強く受ける施設に
おいても、電気絶縁鉄筋２０が非磁性鋼棒２１により作
成されているため磁界変動に伴う誘導電流の発生を低く
押える。また、コンクリート中に配設される電気絶縁鉄
筋２０の全面が電気絶縁材２２で被覆されているので、
電気的半導性を有するコンクリートを通して侵入する外
部からの電流を遮断する。In a reinforced concrete structure having such a reinforcement structure, the electrically insulating reinforcing bars 20 are replaced by the non-magnetic steel bars 21 even in facilities that are strongly affected electrically by changes in magnetic fields and potential, such as nuclear fusion reactor buildings and linear motor car facilities. Because it is created by a magnetic field, the generation of induced current due to magnetic field fluctuations is kept low. Furthermore, since the entire surface of the electrically insulating reinforcing bars 20 placed in the concrete is covered with the electrically insulating material 22,
Blocks electrical current from outside entering through concrete, which has electrical semiconductivity.
また、本発明の鉄筋による配筋構造の組立て作業は、予
め工場等において非磁性鋼棒２１に電気絶縁材２２の被
覆を施した電気絶縁鉄筋２ｏを用いて行なうので、従来
の電気絶縁性の配筋構造において行なわれていた手間の
かかる作業１例えば鉄筋の交差部やラップ部に特別な絶
縁物を介在させる等の作業を排除して、通常の構造物に
おける鉄筋組立て作業と同様の方法で容易にその組立て
作業を行なうことができる。Furthermore, since the assembly work of the reinforcement structure using reinforcing bars of the present invention is carried out in advance in a factory or the like using electrically insulating reinforcing bars 2o, which are non-magnetic steel bars 21 coated with electrically insulating material 22, conventional electrically insulating By eliminating the labor-intensive work that used to be done in reinforcing structures, such as interposing special insulators at the intersections and laps of reinforcing bars, the method can be used in the same way as reinforcing bars in regular structures. The assembly work can be easily performed.
第５図では、第３図（イ）、（ロ）及び第４図（イ）、
（ロ）に示す鉄筋の配筋構造を試験体として、電気的健
全性を表すコンダクタンスＧ（Ω）を測定した結果を示
す。ここで、コンダクタンスはその値が低いほど電気的
健全性が優れていることを示すものである。図に示すよ
うに、従来の配筋構造すなわち第３図（イ）、（ロ）の
構造では。In Fig. 5, Fig. 3 (a), (b) and Fig. 4 (a),
The results of measuring the conductance G (Ω) representing electrical soundness using the reinforcing bar arrangement structure shown in (b) as a test specimen are shown. Here, the lower the value of conductance, the better the electrical soundness. As shown in the figure, in the conventional reinforcement structure, that is, the structure shown in Fig. 3 (a) and (b).
コンクリートの吸湿状況によりコンダクタンスに大きな
変化が生じ、電気的健全性が不安定であることがわかる
。これに対し本発明の鉄筋による配筋構造では、コンク
リートの吸湿状況によってコンダクタンスが大きく変化
せず、またその値も小さい。したがって電気的健全性が
向上していることがわかる。It can be seen that the conductance changes significantly depending on the moisture absorption state of the concrete, and the electrical integrity is unstable. On the other hand, in the reinforcement structure using reinforcing bars of the present invention, the conductance does not change greatly depending on the moisture absorption state of the concrete, and its value is small. Therefore, it can be seen that the electrical soundness is improved.
〈発明の効果〉
本発明の鉄筋は、非磁性の鋼製材料を電気絶縁材料で覆
ったものからなるので、誘導電流の発生を防ぎ、かつ外
部電流の鉄筋への進入を遮断して、鉄筋コンクリート構
造物に電気的健全性をもたらし、施設内に設置した各種
機器に起こる電気的障害や鉄筋の腐食等を防止するとい
う効果を有する。<Effects of the Invention> Since the reinforcing bars of the present invention are made of a non-magnetic steel material covered with an electrically insulating material, they prevent the generation of induced current and block the entry of external currents into the reinforcing bars, thereby improving reinforced concrete. It has the effect of providing electrical integrity to structures and preventing electrical failures and corrosion of reinforcing bars that occur in various equipment installed within facilities.
また、本発明の鉄筋を用いれば、煩雑な組立て作業を要
することなく、かつ他の作業の能率を低下させることな
く、通常の構造物における作業と同様の方法によって鉄
筋を組立てることにより、電気的健全性を有する鉄筋コ
ンクリート構造物を得ることができる。Furthermore, by using the reinforcing bars of the present invention, electrical A reinforced concrete structure with soundness can be obtained.
第１図は本発明の鉄筋を配筋した鉄筋コンクリート構造
物の一例を示す破断斜視図、第２図は本発明の鉄筋の構
成を示す断面図、第３図（イ）及び（ロ）は本発明の鉄
筋を用いた配筋構造の、鉄筋交差部及び継手部の構成の
一例を示す断面図、第４図（イ）及び（ロ）は従来技術
による配筋構造の、鉄筋交差部及び継手部の構成の一例
を示す断面図、第５図は鉄筋コンクリート構造物の電気
的健全性を表すコンダクタンスＧ（Ω）を、本発明と従
来技術とを比較して示すグラフである。
１０・・鉄筋コンクリート構造物、１１・・主鉄筋、１
２・・配力鉄筋、２０・・電気絶縁鉄筋、２１・・非磁
性鋼棒、２２・・電気絶縁材。
第１図Fig. 1 is a broken perspective view showing an example of a reinforced concrete structure in which the reinforcing bars of the present invention are arranged, Fig. 2 is a sectional view showing the structure of the reinforcing bars of the present invention, and Figs. A sectional view showing an example of the configuration of a reinforcing bar intersection and a joint in a reinforcement structure using the reinforcing bars of the invention, FIGS. FIG. 5 is a graph showing a comparison of the conductance G (Ω) representing the electrical soundness of a reinforced concrete structure between the present invention and the prior art. 10...Reinforced concrete structure, 11...Main reinforcement, 1
2. Distribution reinforcing bars, 20. Electrical insulating reinforcing bars, 21. Non-magnetic steel rods, 22. Electrical insulating materials. Figure 1
Claims (1)
ンクリート構造物に内包される鉄筋の構造において、 前記鉄筋が、電気絶縁材料で覆った非磁性の鋼製材料で
あることを特徴とする鉄筋コンクリート構造物の鉄筋。[Claims] A structure of reinforcing bars included in a reinforced concrete structure that is electrically affected by changes in magnetic fields and electric potential, characterized in that the reinforcing bars are made of a non-magnetic steel material covered with an electrically insulating material. Reinforcing bars for reinforced concrete structures.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21373290A JPH0497064A (en) | 1990-08-14 | 1990-08-14 | Reinforcing steel rod in reinforced concrete structure |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP21373290A JPH0497064A (en) | 1990-08-14 | 1990-08-14 | Reinforcing steel rod in reinforced concrete structure |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| JPH0497064A true JPH0497064A (en) | 1992-03-30 |
Family
ID=16644085
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP21373290A Pending JPH0497064A (en) | 1990-08-14 | 1990-08-14 | Reinforcing steel rod in reinforced concrete structure |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPH0497064A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0637418U (en) * | 1992-10-23 | 1994-05-20 | 日本原子力研究所 | Electrical insulation bar structure |
| JP2009235674A (en) * | 2008-03-25 | 2009-10-15 | Oriental Shiraishi Corp | Insulating coating reinforcement material embedded in concrete, and manufacturing method therefor |
| US7850089B2 (en) * | 2005-04-19 | 2010-12-14 | Rail.One Gmbh | Fixed carriageway for rail vehicles and method of manufacturing the same |
| JP2012117341A (en) * | 2010-12-03 | 2012-06-21 | Fuji Bolt Seisakusho:Kk | Mechanical joint |
-
1990
- 1990-08-14 JP JP21373290A patent/JPH0497064A/en active Pending
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0637418U (en) * | 1992-10-23 | 1994-05-20 | 日本原子力研究所 | Electrical insulation bar structure |
| US7850089B2 (en) * | 2005-04-19 | 2010-12-14 | Rail.One Gmbh | Fixed carriageway for rail vehicles and method of manufacturing the same |
| JP2009235674A (en) * | 2008-03-25 | 2009-10-15 | Oriental Shiraishi Corp | Insulating coating reinforcement material embedded in concrete, and manufacturing method therefor |
| JP2012117341A (en) * | 2010-12-03 | 2012-06-21 | Fuji Bolt Seisakusho:Kk | Mechanical joint |
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