JP2554340Y2 - Reinforcement corrosion meter in concrete - Google Patents
Reinforcement corrosion meter in concreteInfo
- Publication number
- JP2554340Y2 JP2554340Y2 JP1991020442U JP2044291U JP2554340Y2 JP 2554340 Y2 JP2554340 Y2 JP 2554340Y2 JP 1991020442 U JP1991020442 U JP 1991020442U JP 2044291 U JP2044291 U JP 2044291U JP 2554340 Y2 JP2554340 Y2 JP 2554340Y2
- Authority
- JP
- Japan
- Prior art keywords
- concrete
- main body
- measuring instrument
- concrete wall
- measuring device
- 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
Description
【０００１】[0001]
【産業上の利用分野】本考案は、鉄筋コンクート内の鉄
筋の腐食状況を測定する機器に係るものであって、特に
測定しようとするコンクリート壁面の前に障害物や設置
物等が存在していても、それら障害物や設置物を除去す
ることなく簡単迅速に当該コンクリート内の鉄筋の腐食
を測定できるようした鉄筋腐食測定器に関するものであ
る。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for measuring the corrosion state of a reinforcing bar in a reinforced concrete, and in particular, there is an obstacle or an installed object in front of a concrete wall surface to be measured. However, the present invention relates to a rebar corrosion measuring instrument which can measure corrosion of rebar in concrete simply and quickly without removing such obstacles and installations.
【０００２】[0002]
【従来の技術】従来のコンクリート内鉄筋腐食測定器に
は、センサ部が筒状の単体のものと、同センサ部が連続
測定が可能な円盤状で回転式のものとがあった。2. Description of the Related Art Conventionally, there are two types of measuring instruments for reinforcing steel corrosion in concrete: a cylindrical one having a cylindrical sensor portion and a disk-shaped rotating type having a sensor portion capable of continuous measurement.
【０００３】[0003]
【考案が解決しようとする課題】ところが、上記した従
来のコンクリート内鉄筋腐食測定器を使用してコンクリ
ート内の鉄筋の腐食を非破壊的に調査測定する場合、次
のような問題があった。まず、センサ部が単体で筒状の
測定器では、点的に複数の箇所を測定することになるの
で、コンクリート壁面の測定すべき全範囲の測定を完了
するのに時間がかかりすぎ、また、障害物や設置物がそ
の測定すべきコンクリート壁面前に存在する場合には、
測定すべき部分がその障害物や設置物の影となるので、
筒状のセンサ部が入らなかったり、手が届かない等の事
態が発生し、測定ができない箇所が発生する。However, non-destructive investigation and measurement of the corrosion of reinforcing steel in concrete using the above-described conventional steel reinforcing corrosion measuring apparatus in concrete has the following problems. First, in a cylindrical measuring device with a single sensor unit, it will measure a plurality of points in points, so it takes too much time to complete the measurement of the entire range of the concrete wall to be measured, If obstacles or installations are in front of the concrete wall to be measured,
Since the part to be measured is the shadow of the obstacle or installation,
Situations such as the inability of the cylindrical sensor part to enter or the inaccessibility of the sensor may occur, and places where measurement may not be possible may occur.
【０００４】また、円盤状の回転式のセンサ部をもつ測
定器では、測定すべきコンクリート壁面の前に障害物や
設置物がない場合は、連続的に測定を行うことができる
ので効率的であるが、この測定器のセンサ部は最小のも
のでも直径が１００ｍｍであり、上記した障害物や設置
物が存在する場合には、その部分の測定は困難で、特に
その障害物や設置物とコンクリート壁面との離間間隔が
少ないときは、測定は不可能であった。In a measuring instrument having a disk-shaped rotary sensor unit, when there is no obstacle or installation in front of the concrete wall surface to be measured, continuous measurement can be performed, so that it is efficient. However, even the smallest sensor part of this measuring instrument has a diameter of 100 mm, and when the above-mentioned obstacles and installations are present, it is difficult to measure the parts, especially with the obstacles and installations. When the distance from the concrete wall was small, measurement was not possible.
【０００５】更に、上記したように、従来の測定器では
測定できる箇所が断片的で測定データが少なく不連続で
あったので、コンクリート内鉄筋の劣化診断が信憑性に
欠けていた。Further, as described above, the conventional measuring device has a fragmentary portion at which measurement can be performed and the measurement data is small and discontinuous, so that the deterioration diagnosis of the reinforcing steel in concrete lacks credibility.
【０００６】本考案の目的は、測定すべきコンクリート
壁面前に障害物や設置物が存在する場合でも、そのコン
リクート壁面からの離間間隔が若干あれば連続測定が可
能となるようにして、上記した問題をすべて解決した鉄
筋腐食測定器を提供することである。An object of the present invention is to enable continuous measurement even if there is an obstacle or an installed object in front of a concrete wall surface to be measured, if there is a slight distance from the concrete wall surface. An object of the present invention is to provide a rebar corrosion measuring instrument that solves all the problems.
【０００７】[0007]
【課題を解決するための手段】このため本考案は、鉄筋
コンクリート構造物内の鉄筋の自然電位値をコンクリー
ト壁面から検出するセンサの複数個を正面に列状に配置
した棒状の測定器本体部と、該測定器本体部の背面のほ
ぼ中央部からバネ部を介して直立させた把手部と、前記
測定器本体部の両端近傍を前記把手部の基部付近に支持
する圧力伝達板と、を具備するよう構成した。SUMMARY OF THE INVENTION For this reason, the present invention provides a rod-shaped measuring device main body in which a plurality of sensors for detecting the spontaneous potential value of a reinforcing bar in a reinforced concrete structure from a concrete wall surface are arranged in a front row. A handle portion that stands upright from a substantially central portion of the back surface of the measuring device main body via a spring portion, and a pressure transmission plate that supports both ends of the measuring device main body near the base of the handle. It was configured to do so.
【０００８】[0008]
【実施例】以下、本考案の実施例について説明する。図
１はその一実施例のコンクリート内鉄筋腐食測定器の側
面図、図２は同測定器の平面図、図３は同測定器の底面
図である。１は重量の軽いプラスチックで構成された棒
状の測定器本体部１であって、その中央部分にバネ部２
によって把手部３が直立状態で結合されている。４は測
定器本体部１を把手部３に支持する圧力伝達板であり、
測定器本体部１よりも剛性の強い材料で形成されてい
る。上記測定器本体部１には、その底面に複数のセンサ
５が測定器本体部１の長手方向に沿って１列に配列さ
れ、そこには照合電極としての飽和硫酸銅電極６が装備
されている。そして、測定器本体部１のセンサ５の各々
は、把手部３内に設けられたリレー回路７により切換制
御され、各センサ５での検知結果が連続的に取り込まれ
るようになっている。なお、本実施例の測定器Ａは、圧
力伝達板４の頂部（把手部３への結合部）とセンサ５の
先端部との間の距離や測定器本体部１の横幅が５０ｍｍ
以下に設定されている。Embodiments of the present invention will be described below. FIG. 1 is a side view of an apparatus for measuring corrosion of reinforcing steel in concrete according to one embodiment, FIG. 2 is a plan view of the apparatus, and FIG. 3 is a bottom view of the apparatus. Reference numeral 1 denotes a rod-shaped measuring instrument main body 1 made of light plastic, and a spring 2
Thereby, the handle part 3 is connected in an upright state. 4 is a pressure transmission plate for supporting the measuring device main body 1 on the handle 3,
It is formed of a material having higher rigidity than the measuring device main body 1. A plurality of sensors 5 are arranged on the bottom surface of the measuring instrument main body 1 in a row along the longitudinal direction of the measuring instrument main body 1, and a saturated copper sulfate electrode 6 as a reference electrode is provided therein. I have. Each of the sensors 5 of the measuring device main body 1 is switched and controlled by a relay circuit 7 provided in the handle 3, so that the detection results of the sensors 5 are continuously taken in. The measuring instrument A of the present embodiment has a distance between the top of the pressure transmitting plate 4 (joining portion to the handle 3) and the tip of the sensor 5 and a lateral width of the measuring instrument main body 1 of 50 mm.
It is set as follows.
【０００９】本実施例の測定器Ａで行う鉄筋の腐食の調
査測定は、次のメカニズムを利用するものである。すな
わち、コンクリート内の鉄筋が腐食すると、その腐食し
ている部分とそうでない部分とで自由エネルギーに差が
生じる。これが熱力学的には系の安定化のためにエネル
ギーを放出する。このエネルギーが起電力となり、腐食
部分がアノードとなって酸化反応を起こし、他の部分は
カソードとなって還元反応を起こす。すなわち、腐食電
池とでもいうべきものが形成され、腐食の進行に伴って
腐食電流がコンクリート内に存在する。The investigation and measurement of the corrosion of the reinforcing steel performed by the measuring device A of the present embodiment utilizes the following mechanism. That is, when the reinforcing steel in the concrete is corroded, a difference occurs in the free energy between the corroded portion and the non-corroded portion. This thermodynamically releases energy to stabilize the system. This energy becomes an electromotive force, and the corroded portion becomes an anode to cause an oxidation reaction, and the other portion becomes a cathode to cause a reduction reaction. That is, what is called a corrosion battery is formed, and a corrosion current is present in concrete as the corrosion progresses.
【００１０】そこで、このような状態の鉄筋コンクリー
ト構造物のコンクリート壁面に水道の水等の導電性のあ
る水を充分散布し、照合電極となる硫酸銅電極６（セン
サ５）を押し当てることにより、自然電位値が検出され
るので、その大きさによってコンクリート内の鉄筋の腐
食度合を知ることができるのである。Therefore, conductive water such as tap water is charged and dispersed on the concrete wall surface of the reinforced concrete structure in such a state, and a copper sulfate electrode 6 (sensor 5) serving as a reference electrode is pressed. Since the self-potential value is detected, the degree of corrosion of the reinforcing steel in the concrete can be known from the magnitude of the self-potential value.
【００１１】測定に当たっては、把手部３により測定器
本体部１の底面の各センサ５を測定すべきコンクリート
壁面に押し当てる。このとき、把手部３に加えた押当力
がバネ部２や圧力伝達板４により測定器本体部１の中央
部と両端部分に伝達され、この結果各センサ５が均一な
圧力でコンクリート壁面に圧接されるようになる。In measurement, each sensor 5 on the bottom surface of the measuring device main body 1 is pressed against the concrete wall surface to be measured by the handle 3. At this time, the pressing force applied to the handle portion 3 is transmitted to the center portion and both end portions of the measuring device main body 1 by the spring portion 2 and the pressure transmitting plate 4, and as a result, each sensor 5 is uniformly pressed on the concrete wall surface. Become pressed.
【００１２】ところで、図４に示すように、測定すべき
コンクリート壁面１０に相互の離間距離Ｌ１が１００ｍ
ｍ、コンクリート壁面１０に対する離間距離Ｌ２が５０
ｍｍで設置物１１、１２が存在する場合では、従来の測
定器ではその設置物１１、１２を動かして測定を行い、
その後に元に戻すという作業が必要であった。As shown in FIG. 4, the concrete wall surface 10 to be measured has a mutual distance L1 of 100 m.
m, the separation distance L2 from the concrete wall surface 10 is 50
In the case where the installations 11 and 12 are present in mm, the measurement is performed by moving the installations 11 and 12 in the conventional measuring device,
Then it was necessary to restore it.
【００１３】しかし、本実施例の測定器Ａを使用する場
合には、設置物１１、１２の間に縦方向に測定器Ａの測
定器本体部１を挿入してコンクリート壁面１０にセンサ
部５を押し当てて、コンクリート内の鉄筋の自然電位を
検出することができる。更に、この測定器本体部１を横
方向に９０度回転させれば、その測定器本体部１が設置
物１１、１２とコンクリート壁面１０との間に入り込
み、従来では影となっていた部分までも測定が可能とな
る。However, when using the measuring device A of the present embodiment, the measuring device main body 1 of the measuring device A is inserted vertically between the installation objects 11 and 12 so that the sensor portion 5 is mounted on the concrete wall 10. To detect the spontaneous potential of the reinforcing steel in the concrete. Furthermore, if the measuring instrument main body 1 is rotated 90 degrees in the horizontal direction, the measuring instrument main body 1 enters between the installations 11 and 12 and the concrete wall surface 10, and reaches a portion which was conventionally shadowed. Can also be measured.
【００１４】図５はコンクリート壁面１０にボルトで固
定した筋金物１３に受金物１４を支持させて、その受金
物１４上にケーブル１５を支持させた構造を示す図であ
る。このような構造は、電気通信事業者や電力事業者に
より地下トンネル構造物設備の一部とし良く利用されて
いる。電気通信事業者であればケーブル１５とは通信用
ケーブルであり、電力事業者であれば送電用ケーブルで
ある。FIG. 5 is a view showing a structure in which a metal receiving member 14 is supported by a metal bar 13 fixed to a concrete wall surface 10 with bolts, and a cable 15 is supported on the metal receiving member 14. Such a structure is often used as part of an underground tunnel structure facility by a telecommunications company or a power company. In the case of a telecommunications company, the cable 15 is a communication cable, and in the case of a power company, it is a power transmission cable.
【００１５】このような構造の測定箇所では、測定器Ａ
の測定器本体部１を横状態でケーブル１５の間に挿入
し、コンクリート壁面１０に各センサ５を圧接させて測
定できる。また、その測定器本体部１を横方向に９０度
回転させれば、ケーブル１５の影になった部分の測定も
可能となる。At the measuring point having such a structure, the measuring instrument A
The main body 1 of the measuring device is inserted between the cables 15 in a horizontal state, and each sensor 5 can be pressed against the concrete wall surface 10 for measurement. If the measuring device main body 1 is rotated 90 degrees in the horizontal direction, it is possible to measure the shadowed portion of the cable 15.
【００１６】[0016]
【考案の効果】以上から本考案によれば、次に述べるよ
うな利点がある。（１）．従来の測定器では測定できな
かった狭隘箇所での測定が可能となる。（２）．測定す
べきコンクリート壁面前に障害物や設置物があっても、
それらの裏側に測定器本体部を入り込ませることができ
るので、測定データを豊富に連続的に得ることができ、
コンクリート内鉄筋の劣化診断に正確を期することがで
きる。（３）．測定すべきコンクリート壁面前に障害物
や設置物があっても、それらを移動させることなく測定
できるので、測定開始前の作業がなくなり、迅速且つ低
コトスでの測定作業が可能となる。（４）．以上から、
コンクリート内鉄筋の劣化調査に手間がかからず、また
信頼性の高い劣化診断ができ、劣化の早期発見が可能と
なって、前もって維持修理の対策を企てることができ
る。According to the present invention, the following advantages can be obtained. (1). It is possible to measure in narrow places that could not be measured with conventional measuring instruments. (2). Even if there are obstacles or installations in front of the concrete wall to be measured,
Since the main body of the measuring instrument can be inserted into the back side of them, measurement data can be obtained abundantly and continuously,
Accurate diagnosis of deterioration of steel bars in concrete. (3). Even if there are obstacles or installations in front of the concrete wall surface to be measured, the measurement can be performed without moving them, so that the work before the start of the measurement is eliminated, and the measurement work can be performed quickly and with low cost. (4). From the above,
Inspection of the deterioration of the reinforcing steel in the concrete does not take much trouble, and the deterioration can be diagnosed with high reliability. As a result, the deterioration can be detected early and the maintenance and repair measures can be planned in advance.
【図面の簡単な説明】[Brief description of the drawings]
【図１】 本考案の一実施例のコンクリート内鉄筋腐
食測定器の側面図である。FIG. 1 is a side view of an apparatus for measuring corrosion of reinforcing steel in concrete according to one embodiment of the present invention.
【図２】 同実施例の測定器の平面図である。FIG. 2 is a plan view of the measuring instrument of the embodiment.
【図３】 同実施例の測定器の底面図である。FIG. 3 is a bottom view of the measuring instrument of the embodiment.
【図４】 同実施例の測定器による測定説明図であ
る。FIG. 4 is an explanatory diagram of measurement by the measuring device of the embodiment.
【図５】 同実施例の測定器による測定説明図であ
る。FIG. 5 is an explanatory diagram of measurement by the measuring device of the embodiment.
Ａ：コンクリート内鉄筋腐食測定器、１：測定器本体
部、２：バネ部、３：把手部、４：圧力伝達板、５：セ
ンサ、６：飽和硫酸銅電極、７：リレー回路、１０：コ
ンクリート壁面、１１、１２：設置物、１３：筋金物、
１４：受金物、１５：ケーブル。A: Corrosion meter for concrete in steel, 1: Measuring device main body, 2: Spring, 3: Handle, 4: Pressure transmission plate, 5: Sensor, 6: Saturated copper sulfate electrode, 7: Relay circuit, 10: Concrete wall surface, 11 and 12: installation object, 13: hard metal,
14: receiving object, 15: cable.
Claims (1)
位値をコンクリート壁面から検出するセンサの複数個を
正面に列状に配置した棒状の測定器本体部と、該測定器
本体部の背面のほぼ中央部からバネ部を介して直立させ
た把手部と、前記測定器本体部の両端近傍を前記把手部
の基部付近に支持する圧力伝達板と、を具備することを
特徴とするコンクリート内鉄筋腐食測定器。A plurality of sensors for detecting a natural potential value of a reinforcing bar in a reinforced concrete structure from a concrete wall surface.
A rod-shaped measuring instrument main body arranged in a row on the front surface, a handle portion erecting from a substantially central portion of the back surface of the measuring instrument main body via a spring portion, and a handle near both ends of the measuring instrument main body. Department
And a pressure transmission plate supported near the base of the concrete.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991020442U JP2554340Y2 (en) | 1991-03-07 | 1991-03-07 | Reinforcement corrosion meter in concrete |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP1991020442U JP2554340Y2 (en) | 1991-03-07 | 1991-03-07 | Reinforcement corrosion meter in concrete |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH04109358U JPH04109358U (en) | 1992-09-22 |
| JP2554340Y2 true JP2554340Y2 (en) | 1997-11-17 |
Family
ID=31906522
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP1991020442U Expired - Lifetime JP2554340Y2 (en) | 1991-03-07 | 1991-03-07 | Reinforcement corrosion meter in concrete |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2554340Y2 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180058241A (en) * | 2016-11-23 | 2018-06-01 | (주)스마트 제어계측 | Concrit pole diagnostic apparatus |
| KR102360138B1 (en) * | 2021-06-14 | 2022-02-08 | (주)본이엔씨 | Measuring apparatus for retain wall |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP6891068B2 (en) * | 2017-07-27 | 2021-06-18 | 清水建設株式会社 | Measuring instrument |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB8523553D0 (en) * | 1985-09-24 | 1985-10-30 | Colebrand Ltd | Corrosion detection |
-
1991
- 1991-03-07 JP JP1991020442U patent/JP2554340Y2/en not_active Expired - Lifetime
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| KR20180058241A (en) * | 2016-11-23 | 2018-06-01 | (주)스마트 제어계측 | Concrit pole diagnostic apparatus |
| KR101895206B1 (en) * | 2016-11-23 | 2018-09-10 | (주)스마트 제어계측 | Concrit pole diagnostic apparatus |
| KR102360138B1 (en) * | 2021-06-14 | 2022-02-08 | (주)본이엔씨 | Measuring apparatus for retain wall |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH04109358U (en) | 1992-09-22 |
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