JP2701855B2 - Water absorbing capsule containing grounding resistance reducing agent and its use. - Google Patents
Water absorbing capsule containing grounding resistance reducing agent and its use.Info
- Publication number
- JP2701855B2 JP2701855B2 JP62301210A JP30121087A JP2701855B2 JP 2701855 B2 JP2701855 B2 JP 2701855B2 JP 62301210 A JP62301210 A JP 62301210A JP 30121087 A JP30121087 A JP 30121087A JP 2701855 B2 JP2701855 B2 JP 2701855B2
- Authority
- JP
- Japan
- Prior art keywords
- reducing agent
- water
- resistance reducing
- capsule
- grounding resistance
- 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 - Fee Related
Links
- 239000002775 capsule Substances 0.000 title claims description 27
- 239000003638 chemical reducing agent Substances 0.000 title claims description 27
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 title claims description 22
- 239000000126 substance Substances 0.000 claims description 23
- 239000003795 chemical substances by application Substances 0.000 claims 1
- 239000004568 cement Substances 0.000 description 11
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 description 9
- 239000000463 material Substances 0.000 description 6
- 239000004576 sand Substances 0.000 description 5
- 239000011398 Portland cement Substances 0.000 description 4
- 239000010440 gypsum Substances 0.000 description 4
- 229910052602 gypsum Inorganic materials 0.000 description 4
- 238000005553 drilling Methods 0.000 description 3
- 238000000034 method Methods 0.000 description 3
- 239000000203 mixture Substances 0.000 description 3
- 238000000926 separation method Methods 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000002250 absorbent Substances 0.000 description 2
- XFWJKVMFIVXPKK-UHFFFAOYSA-N calcium;oxido(oxo)alumane Chemical compound [Ca+2].[O-][Al]=O.[O-][Al]=O XFWJKVMFIVXPKK-UHFFFAOYSA-N 0.000 description 2
- 230000000052 comparative effect Effects 0.000 description 2
- 239000004020 conductor Substances 0.000 description 2
- 230000000694 effects Effects 0.000 description 2
- 239000000835 fiber Substances 0.000 description 2
- 239000011521 glass Substances 0.000 description 2
- 238000003780 insertion Methods 0.000 description 2
- 230000037431 insertion Effects 0.000 description 2
- 239000004033 plastic Substances 0.000 description 2
- 235000019353 potassium silicate Nutrition 0.000 description 2
- 230000001603 reducing effect Effects 0.000 description 2
- 239000000377 silicon dioxide Substances 0.000 description 2
- NTHWMYGWWRZVTN-UHFFFAOYSA-N sodium silicate Chemical compound [Na+].[Na+].[O-][Si]([O-])=O NTHWMYGWWRZVTN-UHFFFAOYSA-N 0.000 description 2
- 239000002689 soil Substances 0.000 description 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 description 1
- 229910004261 CaF 2 Inorganic materials 0.000 description 1
- 229920000049 Carbon (fiber) Polymers 0.000 description 1
- 229910000831 Steel Inorganic materials 0.000 description 1
- QAOWNCQODCNURD-UHFFFAOYSA-L Sulfate Chemical compound [O-]S([O-])(=O)=O QAOWNCQODCNURD-UHFFFAOYSA-L 0.000 description 1
- 238000010521 absorption reaction Methods 0.000 description 1
- 229910052782 aluminium Inorganic materials 0.000 description 1
- XAGFODPZIPBFFR-UHFFFAOYSA-N aluminium Chemical compound [Al] XAGFODPZIPBFFR-UHFFFAOYSA-N 0.000 description 1
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 239000011400 blast furnace cement Substances 0.000 description 1
- OSGAYBCDTDRGGQ-UHFFFAOYSA-L calcium sulfate Chemical compound [Ca+2].[O-]S([O-])(=O)=O OSGAYBCDTDRGGQ-UHFFFAOYSA-L 0.000 description 1
- ZOMBKNNSYQHRCA-UHFFFAOYSA-J calcium sulfate hemihydrate Chemical compound O.[Ca+2].[Ca+2].[O-]S([O-])(=O)=O.[O-]S([O-])(=O)=O ZOMBKNNSYQHRCA-UHFFFAOYSA-J 0.000 description 1
- 229910052799 carbon Inorganic materials 0.000 description 1
- 239000004917 carbon fiber Substances 0.000 description 1
- 239000010962 carbon steel Substances 0.000 description 1
- 238000010276 construction Methods 0.000 description 1
- 238000007796 conventional method Methods 0.000 description 1
- 239000003792 electrolyte Substances 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 230000001747 exhibiting effect Effects 0.000 description 1
- 239000004744 fabric Substances 0.000 description 1
- 239000010881 fly ash Substances 0.000 description 1
- 230000008595 infiltration Effects 0.000 description 1
- 238000001764 infiltration Methods 0.000 description 1
- 238000005259 measurement Methods 0.000 description 1
- VNWKTOKETHGBQD-UHFFFAOYSA-N methane Chemical compound C VNWKTOKETHGBQD-UHFFFAOYSA-N 0.000 description 1
- 239000002985 plastic film Substances 0.000 description 1
- 229920006255 plastic film Polymers 0.000 description 1
- 239000011148 porous material Substances 0.000 description 1
- 238000004904 shortening Methods 0.000 description 1
- -1 silica sand Chemical compound 0.000 description 1
- 239000002002 slurry Substances 0.000 description 1
- 239000002699 waste material Substances 0.000 description 1
Landscapes
- Manufacturing Of Electrical Connectors (AREA)
- Investigation Of Foundation Soil And Reinforcement Of Foundation Soil By Compacting Or Drainage (AREA)
- Soil Conditioners And Soil-Stabilizing Materials (AREA)
Description
【発明の詳細な説明】
〔産業上の利用分野〕
本発明は、耐久性及び作業性に優れた接地抵抗低減剤
入り吸水性カプセル及びその使用法に関するものであ
る。
〔従来の技術とその問題点〕
従来の接地施工は、接地電極埋設のための穴を掘り、
電極を埋設してから、セメント、石膏及び水ガラス等に
電解質を加えて接地抵抗低減剤とし、これを水と撹拌混
合した後、接地電極周辺に流し込み、土を埋め戻すこと
が行われていた（例えば特開昭54−140158号公報）。
しかしながら、従来の方法では、接地抵抗低減剤と水
の撹拌混合作業が常に必要であり、また穿孔中に直接流
し込んだときに材料分離等により所定の低減効果が得ら
れないという問題点があった。
本発明は、接地抵抗低減剤を所定の容器に入れカプセ
ル化して用いることにより、これらの問題点を解決し、
接地抵抗低減剤の接地施工を容易にしたものである。
〔問題点を解決するための手段〕
本発明の第１の発明は、導電性物質と水硬性ゲル物質
を含有する接地抵抗低減剤を充填してなるカプセルであ
り、該カプセルは接地電極打込時の衝撃により破壊して
該接地抵抗低減剤を水和硬化せしめることを特徴とする
接地抵抗低減剤入り吸水性カプセルである。
第２の発明は、穿孔内に接地電極を埋設して固定する
際に、導電性物質と水硬性ゲル物質を含有してなる接地
抵抗低減剤を充填してなり、接地電極打込時の衝撃によ
り破壊せしめる接地抵抗低減剤入り吸水性カプセルを予
め水中に浸漬し、これを前記穿孔内に挿入した後、接地
電極を打込むことにより該カプセルを破壊し、前記接地
抵抗低減剤と水とを水和硬化させ、前記接地電極を固定
することを特徴とする接地抵抗低減剤入り吸水性カプセ
ルの使用法である。
以下、本発明を詳しく説明する。
本発明でいう「吸水性カプセル」とは、導電性物質と
水硬性ゲル物質を充填したガプセルを水に浸漬したと
き、水が容易にその中に浸入でき、また該カプセルを穿
孔内に挿入した後、接地電極打込時の衝撃により容易に
破壊し、しかも運搬等の取扱いに際し、簡単に破損しな
い材料、例えば、吸水性の和紙若しくは布、細孔を有す
る合成紙若しくはプラスチックフィルム、又は小孔をあ
けた通気性のないガラス若しくはプラスチック等をい
う。
吸水性カプセルの形状は、通常内部に導電性物質と水
硬性ゲル物質を充填可能とする直径１〜6cm程度の円筒
状の袋等からなり、その長さは穿孔長に応じたもので、
且つ取扱い容易なものであればよく、10〜100cm程度が
好ましい。
穿孔内への挿入に際し、所定の強度を保持するため
に、該カプセルの内側又は外側にプラスチック製又はガ
ラス製等の円筒状若しくは板状材料を介在させ、且つ該
材料に穴を形成して吸水性を保持することもできる。
本発明でいう導電性物質とは炭素繊維若しくは鋼繊維
等の導電性繊維、KCl、K2CO3若しくはK2SO4等のイオン
性導電性物質をいう。
水硬性ゲル物質とは、セメント、カルシウムアルミネ
ート、若しくは石膏を主成分とするもの、または水ガラ
スを主成分とするもの等をいうが、各々を単独で使用し
てもよいし、または併用してもよい。
セメントとしては、普通ポルトランドセメント、中庸
熱ポルトランドセメント、早強ポルトランドセメント若
しくは耐硫酸塩セメント等のポルトランド系セメント、
高炉セメント、シリカセメント若しくはフライアッシュ
セメント等の混合セメント、アルミナセメント、白色セ
メント、超速硬セメント若しくは膨張セメント等の特殊
セメントが該当する。
カルシウムアルミネートとしては、CaOをＣ、Al2O3を
Ａで示すと、CA2、CA、C3A、C12A7、C11A7CaF2、若しく
はこれらと同一組成の無定形物等が該当する。
石膏としては、無水石膏、半水石膏若しくは二水石膏
等が該当する。
尚、該カプセル中に珪砂、川砂、山砂、若しくは人工
軽量骨材等の天然又は人工の砂を混入することは、穿孔
挿入前の浸水時間の短縮化に役立つが、その粒度や配合
量は、導電性物質や水硬性ゲル物質の種類、さらには砂
の種類によって決められる。
本発明に係る接地抵抗低減剤入り吸水性カプセルを用
いて接地抵抗を低減する方法を実施することにより、接
地抵抗低減剤と水との撹拌混合作業を省略することがで
き、且つ穿孔中に充填した材料の分離もなくなる。
即ち、導電性物質と水硬性ゲル物質を充填した吸水性
カプセルを予め水中に数秒から数分間、好ましくは30秒
から３分間水中に浸漬し、その後穿孔内にこれを挿入し
てから、接地電極を打込んで衝撃を与え該カプセルを破
壊し、前記接地抵抗低減剤と水とを混合、水和硬化させ
ればよい。
尚、上記の如く導電性物質と水硬性ゲル物質を充填し
た吸水性ガプセルを水中で浸漬して吸水状態を形成する
代わりに、湧水の多い穿孔では該カプセルを穿孔中にそ
のまま挿入することができる。この時は、湧水によって
吸水状態が形成できるためである。
〔実施例〕
以下実施例により、本発明を更に詳しく説明する。
実施例１〜３
長さ50cm、直径3cmの網目状塩ビ製チューブ入りの吸
水性のよい和紙袋中に、第１表の実施例１〜３に示す配
合の接地抵抗低減剤を十分に混合したものを充填し、そ
の袋の端部をアルミニウム口金で止めた。
また、直径50cm、深さ50cmの穴を掘り、更に穴の底部
に穿孔機で深さ100cm、直径4cmの穴を３ケ所掘った。
次に、実施例１〜３に示す接地抵抗低減剤を充填した
吸水性カプセルを各々水に２分間浸漬した後、前記の穴
に２本ずつ挿入し、続いて接地電極を打ち込んだ。
比較例１〜３
実施例１〜３と同一組成の導電性物質と水硬性ゲル物
質からなる接地抵抗低減剤を、和紙袋に充填せずに、水
と撹拌混合してスラリー化したものを接地電極の周辺に
流し込み、土を埋め戻した。 実施例１〜３及び比較例１〜３の接地抵抗値の測定結
果を第２表に示す。〔発明の効果〕
本発明の接地抵抗低減剤入り吸水性カプセルを用いる
ことにより、接地抵抗低減剤と水との撹拌混合作業を省
略することができ、且つ穿孔中に充填したものの材料分
離をなくすことができ、長期にわたり、所定の接地抵抗
低減効果を示す接地電極を得ることができる。Description: TECHNICAL FIELD The present invention relates to a water-absorbing capsule containing a grounding resistance reducing agent excellent in durability and workability, and a method of using the same. [Conventional technology and its problems] Conventional grounding construction involves digging a hole to bury a ground electrode,
After burying the electrode, an electrolyte was added to cement, gypsum, water glass, etc. to make a grounding resistance reducing agent, and this was stirred and mixed with water, and then poured around the grounding electrode to backfill the soil. (For example, JP-A-54-140158). However, in the conventional method, there is a problem that the stirring and mixing work of the grounding resistance reducing agent and water is always required, and a predetermined reduction effect cannot be obtained due to material separation or the like when directly poured into the perforation. . The present invention solves these problems by encapsulating and using a ground resistance reducing agent in a predetermined container,
This facilitates the grounding operation of the grounding resistance reducing agent. [Means for Solving the Problems] A first invention of the present invention is a capsule filled with a grounding resistance reducing agent containing a conductive substance and a hydraulic gel substance, wherein the capsule is formed by driving a ground electrode. A water-absorbing capsule containing a grounding resistance reducing agent characterized in that the capsule is broken by an impact at the time to hydrate and harden the grounding resistance reducing agent. According to a second aspect of the present invention, when the ground electrode is buried and fixed in the perforation, the ground electrode is filled with a ground resistance reducing agent containing a conductive substance and a hydraulic gel substance. A water-absorbing capsule containing a grounding resistance reducing agent that is destroyed by water is immersed in water in advance, and after inserting this into the perforation, the capsule is broken by driving a grounding electrode, and the grounding resistance reducing agent and water are mixed. A method of using a water-absorbing capsule containing a ground resistance reducing agent, wherein the capsule is hydrated and hardened to fix the ground electrode. Hereinafter, the present invention will be described in detail. The `` water-absorbing capsule '' referred to in the present invention means that when a Gapcell filled with a conductive substance and a hydraulic gel substance is immersed in water, the water can easily penetrate into it, and the capsule is inserted into the perforation. Later, the material is easily destroyed by the impact of the grounding electrode, and is not easily damaged during handling such as transportation, such as water-absorbent Japanese paper or cloth, synthetic paper or plastic film having pores, or small holes. Refers to non-permeable glass or plastic, etc. The shape of the water-absorbing capsule usually consists of a cylindrical bag or the like having a diameter of about 1 to 6 cm, which can be filled with a conductive substance and a hydraulic gel substance inside, and the length is in accordance with the perforation length,
What is necessary is just to be easy to handle, and preferably about 10 to 100 cm. In order to maintain a predetermined strength upon insertion into the perforation, a cylindrical or plate-like material such as plastic or glass is interposed inside or outside the capsule, and a hole is formed in the material to absorb water. It can also maintain sex. The conductive material referred to in the present invention refers to a conductive fiber such as carbon fiber or steel fiber, and an ionic conductive material such as KCl, K 2 CO 3 or K 2 SO 4 . Hydraulic gel substance refers to a substance mainly composed of cement, calcium aluminate, or gypsum, or a substance mainly composed of water glass, etc., each of which may be used alone or in combination. You may. Portland cements such as ordinary Portland cement, moderately heated Portland cement, early-strength Portland cement or sulfate-resistant cement,
Blended cement such as blast furnace cement, silica cement or fly ash cement, and special cement such as alumina cement, white cement, ultra-rapid hardening cement or expanded cement are applicable. As calcium aluminate, when CaO is represented by C and Al 2 O 3 is represented by A, CA 2 , CA, C 3 A, C 12 A 7 , C 11 A 7 CaF 2 , or an amorphous material having the same composition as these And so on. Examples of the gypsum include anhydrous gypsum, hemihydrate gypsum, gypsum and the like. In addition, mixing natural or artificial sand such as silica sand, river sand, mountain sand, or artificial lightweight aggregate in the capsule is useful for shortening the water infiltration time before insertion of the perforation. It is determined according to the type of the conductive substance or the hydraulic gel substance, and further, the type of the sand. By performing the method of reducing the ground resistance using the water-absorbing capsule containing the ground resistance reducing agent according to the present invention, the stirring and mixing operation of the ground resistance reducing agent and water can be omitted, and the filling during drilling is performed. There is no separation of waste material. That is, a water-absorbing capsule filled with a conductive substance and a hydraulic gel substance is previously immersed in water for several seconds to several minutes, preferably for 30 seconds to 3 minutes, and then inserted into a perforation, and then grounded. , The capsule may be broken by applying an impact, and the ground resistance reducing agent and water may be mixed and hydrated and hardened. Incidentally, instead of forming a water-absorbing state by immersing the water-absorbing gapcel filled with the conductive substance and the hydraulic gel substance in water as described above, in a perforation with much spring water, it is possible to insert the capsule as it is in the perforation. it can. At this time, the water absorption state can be formed by the spring water. EXAMPLES Hereinafter, the present invention will be described in more detail with reference to examples. Examples 1 to 3 A ground-resistance reducing agent having the composition shown in Examples 1 to 3 in Table 1 was sufficiently mixed in a water-absorbent Japanese paper bag containing a net-like PVC tube having a length of 50 cm and a diameter of 3 cm. The bag was filled, and the end of the bag was closed with an aluminum base. In addition, a hole having a diameter of 50 cm and a depth of 50 cm was dug, and three holes having a depth of 100 cm and a diameter of 4 cm were dug at the bottom of the hole with a drilling machine. Next, each of the water-absorbing capsules filled with the grounding resistance reducing agent shown in Examples 1 to 3 was immersed in water for 2 minutes, then inserted two by two into the above-mentioned holes, and then a ground electrode was driven. Comparative Examples 1-3 Grounding resistance reducing agents consisting of a conductive substance and a hydraulic gel substance having the same composition as in Examples 1-3 were not filled in a Japanese paper bag, but were stirred and mixed with water to form a slurry. It was poured around the electrodes to backfill the soil. Table 2 shows the measurement results of the ground resistance values of Examples 1 to 3 and Comparative Examples 1 to 3. [Effects of the Invention] By using the water-absorbing capsule containing the grounding resistance reducing agent of the present invention, it is possible to omit the stirring and mixing work of the grounding resistance reducing agent and water, and to eliminate the material separation of the one filled during drilling. Thus, a ground electrode exhibiting a predetermined ground resistance reducing effect over a long period of time can be obtained.
Claims (1)
減剤を充填してなるカプセルであり、該カプセルは接地
電極打込時の衝撃により破壊して該接地抵抗低減剤を水
和硬化せしめることを特徴とする接地抵抗低減剤入り吸
水性カプセル。 ２．穿孔内に接地電極を埋設して固定する際に、導電性
物質と水硬性ゲル物質を含有してなる接地抵抗低減剤を
充填してなり、接地電極打込時の衝撃により破壊せしめ
る接地抵抗低減剤入り吸水性カプセルを予め水中に浸漬
し、これを前記穿孔内に挿入した後、接地電極を打込む
ことにより該カプセルを破壊し、前記接地抵抗低減剤と
水とを水和硬化させ、前記接地電極を固定することを特
徴とする接地抵抗低減剤入り吸水性カプセルの使用法。(57) [Claims] A capsule filled with a grounding resistance reducing agent containing a conductive substance and a hydraulic gel substance, wherein the capsule is broken by an impact at the time of driving a grounding electrode to hydrate and harden the grounding resistance reducing agent. A water-absorbing capsule containing a grounding resistance reducing agent. 2. When the ground electrode is buried in the perforation and fixed, it is filled with a ground resistance reducing agent containing a conductive substance and a hydraulic gel substance, and it is destroyed by the impact when the ground electrode is driven. The agent-containing water-absorbing capsule is immersed in water in advance, and after inserting this into the perforation, the capsule is broken by driving a ground electrode, and the ground resistance reducing agent and water are hydrated and cured, Use of a water-absorbing capsule containing a grounding resistance reducing agent, characterized by fixing a grounding electrode.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62301210A JP2701855B2 (en) | 1987-11-28 | 1987-11-28 | Water absorbing capsule containing grounding resistance reducing agent and its use. |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62301210A JP2701855B2 (en) | 1987-11-28 | 1987-11-28 | Water absorbing capsule containing grounding resistance reducing agent and its use. |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPH01143163A JPH01143163A (en) | 1989-06-05 |
| JP2701855B2 true JP2701855B2 (en) | 1998-01-21 |
Family
ID=17894110
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62301210A Expired - Fee Related JP2701855B2 (en) | 1987-11-28 | 1987-11-28 | Water absorbing capsule containing grounding resistance reducing agent and its use. |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2701855B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5839430B1 (en) * | 2015-03-01 | 2016-01-06 | 株式会社ミライト | Grounding method |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102983421B (en) | 2012-12-17 | 2015-04-15 | 徐健 | Forming method and system of grounding body |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH0140150Y2 (en) * | 1987-10-24 | 1989-12-01 |
-
1987
- 1987-11-28 JP JP62301210A patent/JP2701855B2/en not_active Expired - Fee Related
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP5839430B1 (en) * | 2015-03-01 | 2016-01-06 | 株式会社ミライト | Grounding method |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH01143163A (en) | 1989-06-05 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| LAPS | Cancellation because of no payment of annual fees |