JP3654556B2 - End joint construction method for water shielding sheet with water leakage detection function - Google Patents

End joint construction method for water shielding sheet with water leakage detection function Download PDF

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Publication number
JP3654556B2
JP3654556B2 JP04733498A JP4733498A JP3654556B2 JP 3654556 B2 JP3654556 B2 JP 3654556B2 JP 04733498 A JP04733498 A JP 04733498A JP 4733498 A JP4733498 A JP 4733498A JP 3654556 B2 JP3654556 B2 JP 3654556B2
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JP
Japan
Prior art keywords
water
sheet
shielding sheet
joint
detection function
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
Application number
JP04733498A
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Japanese (ja)
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JPH11244806A (en
Inventor
大西雄二
吉原重紀
中澤一磨
潤治 佐々木
大野文良
勝 熊谷
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Shimizu Corp
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Shimizu Corp
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Publication of JPH11244806A publication Critical patent/JPH11244806A/en
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Description

【0001】
【発明の属する技術分野】
本発明は、一般廃棄物処分場、産業廃棄物処分場或いは汚染土壌処分場等において、その露出面に敷設した遮水シートの破断箇所を検知、確認するための漏水検知機能付遮水シートに関する。
【0002】
【従来の技術】
近年、廃棄物や汚染土壌等を封じ込める最終処分場からの漏水に有害物質が含まれ、これによる地下水や河川水の汚染が社会的問題となっている。この原因は、最終処分場の露出面に敷かれた遮水シートが何らかの原因で破断し、そこからの漏水と考えられる。従来、この破断箇所を検知する方法としては、遮水シートによる遮水構造を必要とする処分場において、遮水シートが絶縁性であるという特性を活かし、シートの内部に導線を配置し、ひとたびシートに穴が空くとその漏水によりその部分の電気的特性が変化するため、その漏水位置を検知できるようにしている。
【0003】
図3は、従来の漏水検知機能付遮水シートの端部接続部の断面図を示している。遮水シート1内には導線2が埋設されている。隣接する遮水シート1の端部を重ねて融着部3にて融着し、導線2は融着部3の手前で剥き出して結線部4にて結線し、結線部4の周りを絶縁被覆層5で被覆するようにしている。
【0004】
【発明が解決しようとする課題】
しかしながら、上記従来の方法においては、作業工程が多く、また、熟練度が要求される作業となっていた。
【0005】
本発明は、上記従来の問題を解決するものであって、遮水シートの端部の継ぎと導線の結線を簡単に施工することができる漏水検知機能付遮水シートの端部継手施工法を提供することを目的とする。
【0006】
【課題を解決するための手段】
そのために本発明の請求項1記載の漏水検知機能付遮水シートの端部継手施工法は、遮水シート1に内蔵されシート端部から突出された導線2と、上下に設けられた一対のフランジ部6a、該フランジ部間を連結する連結部6b、前記フランジ部に設けられた抵抗線7および連結部6bに設けられた開孔9を有する継手6とを備え、隣接する遮水シート1、1を前記継手6のフランジ6a間に挿入し、導線2同士を前記開孔9を通して結線した後、前記抵抗線7に通電して遮水シート1とフランジ部6aを融着することを特徴とし、
請求項2記載の発明は、遮水シート1に内蔵されシート端部から突出された導線2と、上下に設けられた一対のフランジ部6a、該フランジ部間を連結する連結部6bおよび前記フランジ部に設けられた抵抗線7を有する継手6とを備え、隣接する遮水シート1、1を前記継手6のフランジ間6aに挿入し、導線2同士を金属箔10を介して前記連結部6bに固定した後、前記抵抗線7に通電して遮水シート1とフランジ部6aを融着することを特徴とする。なお、上記構成に付加した番号は、本発明の理解を容易にするために図面と対比させるもので、これにより本発明が何ら限定されるものではない。
【0007】
【発明の実施の形態】
以下、本発明の実施の形態を図面を参照しつつ説明する。図1は、本発明の漏水検知機能付遮水シートの端部継手施工法の1実施形態を示す断面図である。
【0008】
漏水検知機能付遮水シート1は、塩化ビニール、低密度ポリエチレン等の樹脂シートからなり内部に複数の導線2が内蔵され、導線2の端部は、遮水シート1の端部から突出されている。隣接する遮水シート1、1の間には、遮水シート1と同一の材料からなる継手6が装着される。継手6は断面H型で長尺状の部材であり、上下に設けられた一対のフランジ部6aとフランジ部6a間を連結する連結部6bを備えている。フランジ部6aには遮水シート1の融着部3に沿って抵抗線(電熱線)7が設けられ、連結部6bには導線2に対向して複数の開孔9が設けられている。
【0009】
上記構成からなる遮水シートの端部継手施工法について説明すると、隣接する遮水シート1、1を継手6のフランジ6a間に挿入し、導線2同士を開孔9を通して結線部4にて結線した後、抵抗線7に通電して融着部4にて遮水シート1とフランジ部6aを融着する。
【0010】
遮水シートが破断し漏水箇所が生じている場合、漏洩電流検知器により一方の導線に電流を流すと、他方の導線に電流が流れ、これを漏洩電流検知器が検知し、その結果、遮水シートのどこかで漏水があることを検知することができる。また、特定の導線にオシロスコープを接続してパルスを発生させ、他方の導線に帰ってくる応答波形により漏水個所を検知することができる。
【0011】
図2は、本発明の漏水検知機能付遮水シートの端部継手施工法の他の実施形態を示す断面図である。なお、図1と同一の構成には同一番号を付けて説明を省略する。本実施形態においては、導線2同士をアルミ箔等の金属箔10を介して連結部6bの両側に固定し、アルミ箔10間でコンデンサの機能を果たすようにしている。この方式においては、このコンデンサの部分のインピーダンスが大きくなるので遮水シート1の端部位置を知る目安とすることができる。
【0012】
また、図1の結線方式においても、継手6の連結部6bにアルミ箔などを貼ることによって、逆にインピーダンスが小さくなるので同様に遮水シート1の端部位置を知る目安とすることができる。
【0013】
【発明の効果】
以上の説明から明らかなように本発明によれば、遮水シートの端部の継ぎと導線の結線を簡単に施工することができる。
【図面の簡単な説明】
【図1】本発明の漏水検知機能付遮水シートの端部継手施工法の1実施形態を示す断面図である。
【図2】本発明の漏水検知機能付遮水シートの端部継手施工法の他の実施形態を示す断面図である。
【図3】従来の漏水検知機能付遮水シートの端部接続部の断面図である。
【符号の説明】
1…漏水検知機能付遮水シート
2…導線
3…融着部
4…結線部
6…継手、6a…フランジ部、6b…連結部
7…抵抗線
9…開孔
10…金属箔
[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a water shielding sheet with a water leakage detection function for detecting and confirming a breakage point of a water shielding sheet laid on the exposed surface in a general waste disposal site, an industrial waste disposal site, or a contaminated soil disposal site. .
[0002]
[Prior art]
In recent years, harmful substances are contained in water leakage from final disposal sites that contain waste, contaminated soil, and the like, and contamination of groundwater and river water has become a social problem. The cause is considered to be water leakage from the water shielding sheet laid on the exposed surface of the final disposal site for some reason. Conventionally, as a method of detecting this breakage point, in a disposal site that requires a water-blocking structure with a water-blocking sheet, taking advantage of the property that the water-blocking sheet is insulative, a conductor is placed inside the sheet, When a hole is formed in the sheet, the electrical characteristics of the portion change due to the water leakage, so that the water leakage position can be detected.
[0003]
FIG. 3: has shown sectional drawing of the edge part connection part of the conventional water-impervious sheet with a water leak detection function. A conducting wire 2 is embedded in the water shielding sheet 1. The end portions of the adjacent water-impervious sheet 1 are overlapped and fused at the fusion part 3, the conductor 2 is stripped before the fusion part 3 and connected at the connection part 4, and the periphery of the connection part 4 is covered with insulation It is made to coat | cover with the layer 5. FIG.
[0004]
[Problems to be solved by the invention]
However, the conventional method has many work steps and requires skill.
[0005]
The present invention solves the above-mentioned conventional problems, and provides a method for constructing an end joint of a water shielding sheet with a water leakage detection function capable of easily constructing a joint between an end of a water shielding sheet and a conductor. The purpose is to provide.
[0006]
[Means for Solving the Problems]
For this purpose, the end joint construction method for a water-impervious sheet with a water leakage detection function according to claim 1 of the present invention includes a conductive wire 2 built in the water-impervious sheet 1 and protruding from the sheet end, and a pair of upper and lower provided The adjacent water-impervious sheet 1 includes a flange portion 6a, a connecting portion 6b for connecting the flange portions, a joint 6 having a resistance wire 7 provided in the flange portion and an opening 9 provided in the connecting portion 6b. 1 is inserted between the flanges 6a of the joint 6, the conductors 2 are connected to each other through the opening 9, and then the resistance wire 7 is energized to fuse the water shielding sheet 1 and the flange portion 6a. age,
The invention according to claim 2 is the conductive wire 2 built in the water-impervious sheet 1 and protruding from the end of the sheet, a pair of flange portions 6a provided at the top and bottom, a connecting portion 6b for connecting the flange portions, and the flange And a joint 6 having a resistance wire 7 provided in the part, the adjacent water shielding sheets 1 and 1 are inserted between the flanges 6 a of the joint 6, and the conductors 2 are connected to each other through the metal foil 10 to the connecting part 6 b. Then, the resistance wire 7 is energized to fuse the water shielding sheet 1 and the flange portion 6a. In addition, the number added to the said structure contrasts with drawing in order to make an understanding of this invention easy, and this invention is not limited at all by this.
[0007]
DETAILED DESCRIPTION OF THE INVENTION
Hereinafter, embodiments of the present invention will be described with reference to the drawings. Drawing 1 is a sectional view showing one embodiment of the end joint construction method of the impermeable sheet with a water leak detection function of the present invention.
[0008]
The water shielding sheet 1 with a water leakage detection function is made of a resin sheet such as vinyl chloride or low density polyethylene, and has a plurality of conductors 2 incorporated therein, and ends of the conductors 2 are projected from the ends of the water shielding sheet 1. Yes. A joint 6 made of the same material as that of the water shielding sheet 1 is attached between the adjacent water shielding sheets 1 and 1. The joint 6 is a long member having an H-shaped cross section, and includes a pair of flange portions 6a provided on the upper and lower sides and a connecting portion 6b for connecting the flange portions 6a. A resistance wire (heating wire) 7 is provided in the flange portion 6 a along the fusion portion 3 of the water shielding sheet 1, and a plurality of holes 9 are provided in the connecting portion 6 b so as to face the conductor 2.
[0009]
The end joint construction method for the water shielding sheet having the above configuration will be described. The adjacent water shielding sheets 1, 1 are inserted between the flanges 6 a of the joint 6, and the conductive wires 2 are connected to each other through the opening 9 at the connection portion 4. After that, the resistance wire 7 is energized, and the water shielding sheet 1 and the flange portion 6a are fused by the fused portion 4.
[0010]
If the water shielding sheet breaks and a leak location occurs, when a current is passed through one conductor by the leakage current detector, a current flows through the other conductor, which is detected by the leakage current detector. It is possible to detect that there is water leakage somewhere on the water sheet. Further, a leak point can be detected by connecting an oscilloscope to a specific conductor to generate a pulse and using a response waveform returned to the other conductor.
[0011]
FIG. 2: is sectional drawing which shows other embodiment of the edge part joint construction method of the water shielding sheet with a water leak detection function of this invention. In addition, the same number is attached to the same structure as FIG. 1, and description is abbreviate | omitted. In the present embodiment, the conductive wires 2 are fixed to both sides of the connecting portion 6b via a metal foil 10 such as an aluminum foil so that the aluminum foil 10 functions as a capacitor. In this system, since the impedance of the capacitor portion is increased, it can be used as a standard for knowing the end position of the water shielding sheet 1.
[0012]
Moreover, also in the connection system of FIG. 1, since an impedance becomes small conversely by sticking aluminum foil etc. to the connection part 6b of the coupling 6, it can become a standard which knows the edge part position of the water shielding sheet 1 similarly. .
[0013]
【The invention's effect】
As is clear from the above description, according to the present invention, it is possible to easily construct the joint of the end portion of the water shielding sheet and the connection of the conducting wire.
[Brief description of the drawings]
FIG. 1 is a cross-sectional view showing one embodiment of an end joint construction method for a water shielding sheet with a water leakage detection function of the present invention.
FIG. 2 is a cross-sectional view showing another embodiment of an end joint construction method for a water shielding sheet with a water leakage detection function of the present invention.
FIG. 3 is a cross-sectional view of an end connection portion of a conventional water shielding sheet with a water leakage detection function.
[Explanation of symbols]
DESCRIPTION OF SYMBOLS 1 ... Water-blocking sheet 2 with a water leak detection function ... Conductor 3 ... Fusion part 4 ... Connection part 6 ... Joint, 6a ... Flange part, 6b ... Connection part 7 ... Resistance wire 9 ... Opening 10 ... Metal foil

Claims (2)

遮水シートに内蔵されシート端部から突出された導線と、上下に設けられた一対のフランジ部、該フランジ部間を連結する連結部、前記フランジ部に設けられた抵抗線および連結部に設けられた開孔を有する継手とを備え、隣接する遮水シートを前記継手のフランジ間に挿入し、導線同士を前記開孔を通して結線した後、前記抵抗線に通電して遮水シートとフランジ部を融着することを特徴とする漏水検知機能付遮水シートの端部継手施工法。A conductive wire built in the water-impervious sheet and protruding from the end of the sheet, a pair of upper and lower flange portions, a connecting portion connecting the flange portions, a resistance wire provided in the flange portion, and a connecting portion A joint having an open hole, and inserting an adjacent water shielding sheet between the flanges of the joint, connecting conductors to each other through the opening, and then energizing the resistance wire to provide the water shielding sheet and the flange portion. An end joint construction method for a water-impervious sheet with a water leakage detection function, characterized by fusing. 遮水シートに内蔵されシート端部から突出された導線と、上下に設けられた一対のフランジ部、該フランジ部間を連結する連結部および前記フランジ部に設けられた抵抗線を有する継手とを備え、隣接する遮水シートを前記継手のフランジ間に挿入し、導線同士を金属箔を介して前記連結部に固定した後、前記抵抗線に通電して遮水シートとフランジ部を融着することを特徴とする漏水検知機能付遮水シートの端部継手施工法。A conductive wire that is built in the water-impervious sheet and protrudes from the end of the sheet, a pair of upper and lower flange portions, a connecting portion that connects the flange portions, and a joint that includes a resistance wire provided in the flange portion. And inserting adjacent water-blocking sheets between the flanges of the joint and fixing the conductive wires to the connecting part via a metal foil, and then energizing the resistance wire to fuse the water-blocking sheet and the flange part. An end joint construction method for a water shielding sheet with a water leak detection function characterized by the above.
JP04733498A 1998-02-27 1998-02-27 End joint construction method for water shielding sheet with water leakage detection function Expired - Fee Related JP3654556B2 (en)

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JP04733498A JP3654556B2 (en) 1998-02-27 1998-02-27 End joint construction method for water shielding sheet with water leakage detection function

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JP04733498A JP3654556B2 (en) 1998-02-27 1998-02-27 End joint construction method for water shielding sheet with water leakage detection function

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JP3654556B2 true JP3654556B2 (en) 2005-06-02

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JP4607381B2 (en) * 2001-07-23 2011-01-05 太陽工業株式会社 Vertical impermeable sheet and method for inspecting impermeable wall constructed using the same
JP4979266B2 (en) * 2006-05-12 2012-07-18 大阪府 Protection plate connection method

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