JP2001295425A - Waterproof sheet, joining structure for waterproof sheet, and waterproofing method - Google Patents

Waterproof sheet, joining structure for waterproof sheet, and waterproofing method

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Publication number
JP2001295425A
JP2001295425A JP2000114060A JP2000114060A JP2001295425A JP 2001295425 A JP2001295425 A JP 2001295425A JP 2000114060 A JP2000114060 A JP 2000114060A JP 2000114060 A JP2000114060 A JP 2000114060A JP 2001295425 A JP2001295425 A JP 2001295425A
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JP
Japan
Prior art keywords
waterproof
waterproof sheet
sheet
base
overlapping
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.)
Granted
Application number
JP2000114060A
Other languages
Japanese (ja)
Other versions
JP3409016B2 (en
Inventor
Junichi Aoki
淳一 青木
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
Dyflex Corp
Original Assignee
Dyflex Corp
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Dyflex Corp filed Critical Dyflex Corp
Priority to JP2000114060A priority Critical patent/JP3409016B2/en
Publication of JP2001295425A publication Critical patent/JP2001295425A/en
Application granted granted Critical
Publication of JP3409016B2 publication Critical patent/JP3409016B2/en
Anticipated expiration legal-status Critical
Expired - Fee Related legal-status Critical Current

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Abstract

PROBLEM TO BE SOLVED: To provide techniques capable of enhancing the efficiency of construction work by easily avoiding formation of a gap that is likely to form at the junction between waterproof sheets at the movement of the sheets during waterproofing work for covering a bed made of concrete or the like with the waterproof sheets. SOLUTION: The waterproof sheet 10 is provided having at its edge a tapered overlying part 16 which gets smaller in thickness as it extends outwards from a waterproof sheet body part 24. A joining structure is provided which can easily avoid formation of steps or gaps by joining the overlying parts 16 of the waterproof sheets 10 together or by joining the overlying parts 16 with the edges of the waterproof sheets other than the overlying parts. A waterproofing method is provided allowing easy detection of defects such as pinholes in waterproof films formed on the waterproof sheets.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【０００１】[0001]

【発明の属する技術分野】本発明は、コンクリート等か
らなる下地を覆う防水シートおよび防水シートの接合構
造および防水施工方法に関するものである。BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a waterproof sheet for covering a base made of concrete or the like, a joining structure of the waterproof sheet, and a waterproof construction method.

【０００２】[0002]

【従来の技術】例えば建物屋上等の床面を防水シートを
用いて防水する工事では、帯状、長方形等の目的形状に
成形された防水シートを敷き並べ、隣り合う防水シート
間の隙間のシール作業やテープ貼り作業を行う。また、
敷設した防水シート上に例えばウレタン樹脂等からなる
液状防水材を塗装して、防水シート上に防水性の塗膜を
積層することにより、より確実な防水性能を得ることも
行われている。2. Description of the Related Art For example, in a work of waterproofing a floor surface of a building roof or the like by using a waterproof sheet, a waterproof sheet formed into a target shape such as a band or a rectangle is laid side by side to seal a gap between adjacent waterproof sheets. And tape pasting work. Also,
A more reliable waterproofing property is also obtained by coating a liquid waterproof material made of, for example, urethane resin on the laid waterproof sheet and laminating a waterproof coating film on the waterproof sheet.

【０００３】前記防水シートは、アスファルト、ゴムア
スファルト、塩化ビニル、ゴム、ポリエチレン等を主材
として形成されたものが一般的であり、隣り合う防水シ
ート間の接合は、防水シート縁部同士を重ねせて接合す
ることが一般的である。重ね合わせた防水シート縁部同
士は、接着剤による接着や溶剤による液着、熱融着、こ
れら防水シート縁部を貫通して下地に到達された固定用
ビス（アンカーピン）等により接合状態を維持すること
が普通である。[0003] Generally, the waterproof sheet is formed mainly of asphalt, rubber asphalt, vinyl chloride, rubber, polyethylene, or the like. Adjacent waterproof sheets are joined by overlapping edges of the waterproof sheets. It is common to join them together. The edges of the overlapped waterproof sheets are joined together by bonding with an adhesive, liquid adhesion with a solvent, heat fusion, and fixing screws (anchor pins) that penetrate the edge of the waterproof sheet and reach the base. It is common to maintain.

【０００４】しかしながら、前述のように防水シート縁
部同士を単純に重ね合わせた接合部では、下地側の防水
シート縁部を覆うようにして外側から重ね合わされた防
水シートの厚さが段差になって、見栄えが悪くなった
り、長年の使用によって剥がれやすくなるといった問題
があった。また、接合部の下地からの突出寸法が大きく
なり、美観に影響を与えたり、歩行の邪魔になる等の問
題もある。この問題に鑑みて、例えば、図８および図９
に示すように、隣り合う防水シート１、１縁部にそれぞ
れ形成した薄肉部２、３同士を重ね合わせる接合構造が
提案されている。この接合構造では、薄肉部２、３の厚
さの合計を、防水シート１、１の厚さと同じあるいはそ
れ以下に調整することで、薄肉部２、３同士を重ね合わ
せてなる接合部５の下地４からの突出寸法を容易に抑え
ることができる。However, as described above, at the joint where the edges of the waterproof sheets are simply overlapped, the thickness of the waterproof sheet overlapped from the outside so as to cover the edges of the waterproof sheet on the base side becomes a step. Thus, there is a problem that the appearance deteriorates and the film is easily peeled off after long-term use. In addition, there is a problem that the protrusion of the joint from the base becomes large, which affects the appearance and hinders walking. In view of this problem, for example, FIGS.
As shown in (1), there has been proposed a joining structure in which thin portions 2, 3 formed on adjacent waterproof sheets 1, 1 and edges thereof are overlapped with each other. In this joint structure, by adjusting the total thickness of the thin portions 2 and 3 to be equal to or less than the thickness of the waterproof sheets 1 and 1, the joint portion 5 formed by overlapping the thin portions 2 and 3 is formed. The protrusion dimension from the base 4 can be easily suppressed.

【０００５】薄肉部２、３は、例えば、型成形等により
得られる。防水シート１の他の部分との境界には、厚さ
の違いに相当する段部６、７が形成される。下地４側の
薄肉部２の段部６と、この薄肉部２上に重ね合わされた
薄肉部３の先端３ａとの間の境界は、図示しないシール
材によりシールされる。防水シート１は、敷設する床面
積や、敷設床面の形状等に応じて、適宜切断等によって
形状を調整し、出来るだけ、薄肉部３の先端３ａとの間
の境界に隙間８が生じないようにする。The thin portions 2 and 3 are obtained, for example, by molding. Steps 6 and 7 corresponding to differences in thickness are formed at the boundary with other parts of the waterproof sheet 1. The boundary between the step 6 of the thin portion 2 on the base 4 side and the tip 3a of the thin portion 3 superposed on the thin portion 2 is sealed with a sealing material (not shown). The waterproof sheet 1 is appropriately shaped by cutting or the like in accordance with the floor area to be laid or the shape of the laying floor, and the gap 8 is not formed at the boundary between the thin sheet 3 and the tip 3a as much as possible. To do.

【０００６】[0006]

【発明が解決しようとする課題】しかしながら、図８、
図９に示したような接合構造では、防水シート１の寸法
調整による隙間８の縮小は手間が掛かる作業であり、ま
た、寸法調整後でも、下地４表面の凹凸、湾曲、水勾配
等により生じる誤差によって、隙間８の発生を完全に解
消することは困難であり、むしろ、大きく開いてしまう
ケースが多々生じていた。また、下地４側の薄肉部２先
端と、その上側に重ねられる防水シート１の段部７との
間の隙間９に物が挟まったり、下地４上の小さな突起が
入り込んだりするだけでも、隙間８が簡単に拡大してし
まう。大きく開いた隙間８は、シール作業に非常に手間
が掛かり、結局、防水工事全体の工期短縮、低コスト化
の妨げになっていた。However, FIG.
In the joint structure as shown in FIG. 9, the reduction of the gap 8 by adjusting the dimensions of the waterproof sheet 1 is a time-consuming operation. Even after the adjustment of the dimensions, the gap 8 is caused by unevenness, curvature, water gradient, and the like on the surface of the base 4. Due to an error, it is difficult to completely eliminate the occurrence of the gap 8, and rather, there are many cases where the gap 8 is greatly opened. Further, even if an object is caught in the gap 9 between the tip of the thin portion 2 on the base 4 side and the step portion 7 of the waterproof sheet 1 superposed thereon, or if a small protrusion on the base 4 enters the gap, 8 easily expands. The widely opened gap 8 took a lot of time and labor for sealing work, and eventually hindered shortening the construction period and cost reduction of the entire waterproofing work.

【０００７】本発明は、前述の課題に鑑みてなされたも
ので、（１）隣り合う防水シート同士を重ね合わせた部
分（接合部）の下地からの突出寸法（シート被着厚）を
縮小できる、（２）下地側の防水シートに対して接合す
る防水シートの重ね位置が変動しても、両防水シート間
に隙間を生じ難く、優れた防水性を確保できる、（３）
接合した防水シート間にて、各防水シート下面の通気溝
同士の連通による通気性を容易に確保できるといった優
れた効果を奏する防水シートおよび防水シートの接合構
造並びに、（４）接合した防水シートの導電体層同士間
の通電を容易とし、これら防水シート上に液状防水材を
塗装して形成した防水塗膜のピンホール等の不具合箇所
の確認を複数の防水シートにわたって連続的に行うこと
なうことを可能とする防水施工方法を提供することを目
的とする。SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned problems, and (1) the protrusion dimension (sheet attachment thickness) of a portion (joining portion) where adjacent waterproof sheets are overlapped can be reduced. (2) Even if the overlapping position of the waterproof sheet to be bonded to the base-side waterproof sheet changes, a gap is hardly generated between the two waterproof sheets, and excellent waterproofness can be secured. (3)
Between the joined waterproof sheets, the waterproof sheet and the joining structure of the waterproof sheets exhibiting an excellent effect that the ventilation between the ventilation grooves on the lower surface of each waterproof sheet can be easily ensured, and (4) the joined waterproof sheets. It facilitates energization between the conductor layers, and continuously checks a plurality of waterproof sheets for trouble spots such as pinholes in a waterproof coating formed by applying a liquid waterproof material on these waterproof sheets. It is an object of the present invention to provide a waterproof construction method that enables the construction.

【０００８】[0008]

【課題を解決するための手段】請求項１記載の防水シー
トは、コンクリート等からなる下地を覆う防水シートで
あって、シート面方向中央部側から外側へ行くに従って
次第に厚さ寸法が縮小するテーパ状の重ね部を縁部に備
えることを特徴とする。この防水シートは、前記重ね部
を有していない防水シート縁部を覆うようにして重ね部
を重ねたり、同様の重ね部を有する防水シートに対して
は重ね部同士を重ね合わせることで、別の防水シートと
接合することを基本とする。この場合、厚さ寸法が変化
するテーパ状になっている重ね部によって、防水シート
同士の接合部とそれ以外の部分との間で、下地上のシー
ト被着厚（接合部では２枚分の防水シートの厚さの合計
がシート被着厚となる）が緩やかに変化し、段差は全く
あるいは殆ど生じない。しかも、相手側の防水シートに
重ね合わせる重ね部は、防水シートの他の部分に比べて
薄く形成されるため、両防水シート同士の接合部の下地
上のシート被着厚を抑えることができるとともに、下地
側の防水シートに対する形状追従性に優れるため、密接
による防水性能を確保しやすいといった利点がある。な
お、この防水シートの接合対象は、防水シートに限定さ
れず、例えば、下地上に突設された様々な設備や、建物
屋上等のパラペット等の立ち上がり部等も含まれ、これ
ら接合対象に対しても、段差を抑えつつ、しかも、防水
性を確保して、重ね部を重ね合わせることが容易であ
る。According to the present invention, there is provided a waterproof sheet for covering a base made of concrete or the like, wherein the thickness of the waterproof sheet gradually decreases from the center toward the outside in the sheet surface direction. It is characterized in that an edge portion is provided with a shape-like overlapping portion. This waterproof sheet is formed by overlapping the overlapping portions so as to cover the edge portion of the waterproof sheet not having the overlapping portion, or by overlapping the overlapping portions on the waterproof sheet having the similar overlapping portion. It is basically connected to a waterproof sheet. In this case, the overlap of the waterproof sheets with the tapered overlapping portion of which the thickness dimension changes causes the thickness of the sheet to be adhered on the underlayer between the joining portion of the waterproof sheets and the other portion (in the joining portion, the thickness of two sheets). (The sum of the thicknesses of the waterproof sheets becomes the thickness of the sheet adhered), and the level changes gradually, and no or almost no level difference occurs. In addition, since the overlapping portion to be overlapped with the other waterproof sheet is formed to be thinner than the other parts of the waterproof sheet, the sheet adhesion thickness on the base of the joint between the two waterproof sheets can be suppressed, and In addition, since it has excellent shape followability with respect to the waterproof sheet on the base side, there is an advantage that it is easy to secure waterproof performance by close contact. In addition, the joining target of this waterproof sheet is not limited to the waterproof sheet, and includes, for example, various facilities protruded on the groundwork, a rising portion of a parapet on a building roof or the like, and the like. However, it is easy to overlap the overlapping portions while suppressing the step and securing the waterproofness.

【０００９】本発明に係る防水シートでは、以下のよう
な構成を採用することがより好ましい。請求項２記載の
発明は、請求項１記載の防水シートにおいて、前記下地
に向けられるシート下面には通気溝が形成され、この通
気溝と連通する連通溝が前記重ね部の前記下地に向けら
れる下面に形成されていることを特徴とする。請求項３
記載の発明は、請求項２記載の防水シートにおいて、前
記シート下面側に、アスファルト、ゴムアスファルト、
塩化ビニル、ゴム、ポリエチレン等のエラストマーから
なるエラストマー層を備え、前記重ね部は前記エラスト
マー層をテーパ状に成形したものであり、前記通気溝及
び前記連通溝は前記エラストマー層に形成された溝であ
ることを特徴とする。請求項４記載の発明は、請求項１
から３のいずれかに記載の防水シートにおいて、前記シ
ート下面と対向するシート表面に、別の防水シートの前
記重ね部の重ね位置の目安となる表示が設けられている
ことを特徴とする。In the waterproof sheet according to the present invention, it is more preferable to adopt the following configuration. According to a second aspect of the present invention, in the waterproof sheet according to the first aspect, a ventilation groove is formed on a lower surface of the sheet facing the base, and a communication groove communicating with the ventilation groove is directed to the base of the overlapping portion. It is characterized in that it is formed on the lower surface. Claim 3
According to the invention as set forth in claim 2, in the waterproof sheet according to claim 2, asphalt, rubber asphalt,
It is provided with an elastomer layer made of an elastomer such as vinyl chloride, rubber, or polyethylene.The overlapping portion is formed by tapering the elastomer layer, and the ventilation groove and the communication groove are grooves formed in the elastomer layer. There is a feature. The invention according to claim 4 is the invention according to claim 1.
3. The waterproof sheet according to any one of 1 to 3, wherein an indication is provided on the sheet surface facing the lower surface of the sheet as an indication of the overlapping position of the overlapping portion of another waterproof sheet.

【００１０】一方または両方が本発明に係る防水シート
である防水シート同士の接合構造では、以下の接合構造
を採用することが好ましい。請求項５記載の発明は、コ
ンクリート等からなる下地を覆う複数の防水シート間を
接合する防水シートの接合構造であって、請求項１から
４のいずれかに記載の防水シートの重ね部同士が重ねら
れていることを特徴とする。この発明によれば、テーパ
状の重ね部同士を重ね合わせた接合部が形成されるた
め、この接合部と、防水シートの他の部分との間では、
下地上のシート被着厚が同じあるいは殆ど変わらなくす
ることが可能である。また、下地に施工された防水シー
ト同士の接合部と、防水シートの前記接合部以外の部分
とで、下地上のシート被着厚に違いがあっても、シート
被着厚の変化は極めて緩やかなものとなり、段差を生じ
ない。In the joint structure between the waterproof sheets, one or both of which are the waterproof sheets according to the present invention, the following joint structure is preferably employed. According to a fifth aspect of the present invention, there is provided a joining structure of a waterproof sheet for joining a plurality of waterproof sheets covering a base made of concrete or the like. It is characterized by being overlapped. According to the present invention, since the joining portion in which the tapered overlapping portions are overlapped is formed, between this joining portion and the other portion of the waterproof sheet,
It is possible that the sheet deposition thickness on the substrate is the same or almost unchanged. In addition, even if there is a difference in the sheet adhesion thickness on the base between the joints between the waterproof sheets applied to the base and the parts other than the joints of the waterproof sheet, the change in the sheet adhesion thickness is extremely gentle. And there is no step.

【００１１】請求項５記載の発明は、下地側に配置され
た防水シートの重ね部が該重ね部を貫通して下地に打ち
込まれたアンカーピンによって下地に固定され、前記下
地側の重ね部の前記アンカーピン打ち込み位置を含む部
分が、別の防水シートの重ね部の重ね合わせによって隠
蔽されていることを特徴とする。この発明によれば、下
地側の重ね部のアンカーピン打ち込み位置が、この重ね
部を覆うようにして重ねられる別の防水シートの重ね部
によって隠蔽される。重ね部間は、接着剤による接着、
シール材の塗布や充填による密閉等により、水密性を容
易に確保できるから、これにより、アンカーピン打ち込
み位置の防水性を容易かつ確実に確保できる。また、前
記アンカーピン打ち込み位置を隠蔽する重ね部は、衝撃
力や引き抜き力等によるアンカーピンの抜けや傾きや変
形等を防止する機能を果たす。さらに、前記アンカーピ
ン打ち込み位置を隠蔽する重ね部は、アンカーピンを覆
うことで、複数枚接合した防水シート上に形成した液状
防水材の塗膜（防水塗膜）に悪影響（突き出し等）を与
えることを防止する機能も果たす。また、例えば、前記
防水塗膜を防水シート上に別途設けない場合は、前記重
ね部によるアンカーピン打ち込み位置の露出防止（隠
蔽）により美観が確保されるといった利点もある。According to a fifth aspect of the present invention, the overlap portion of the waterproof sheet disposed on the base side is fixed to the base by an anchor pin penetrating the overlap portion and driven into the base, and A portion including the anchor pin driving position is concealed by overlapping another waterproof sheet overlapping portion. According to the present invention, the anchor pin driving position of the overlapping portion on the ground side is concealed by the overlapping portion of another waterproof sheet that is overlapped so as to cover the overlapping portion. Adhesion with an adhesive between the overlapping parts,
Watertightness can be easily ensured by sealing or the like by applying or filling the sealant, so that waterproofness at the anchor pin driving position can be easily and reliably ensured. Further, the overlapping portion that conceals the anchor pin driving position has a function of preventing the anchor pin from coming off, tilting, deforming, or the like due to impact force, pull-out force, or the like. Furthermore, the overlapping portion that conceals the anchor pin driving position has a bad influence (projection or the like) on the coating film (waterproof coating film) of the liquid waterproof material formed on the waterproof sheet joined to the plurality of waterproof sheets by covering the anchor pin. It also performs the function of preventing things. In addition, for example, when the waterproof coating is not separately provided on the waterproof sheet, there is an advantage that the appearance is secured by preventing the exposure (hiding) of the anchor pin driving position by the overlapping portion.

【００１２】請求項７記載の発明は、コンクリート等か
らなる下地を覆う複数の防水シート間を接合する防水シ
ートの接合構造であって、請求項２または３記載の防水
シートの重ね部が、下地側の防水シートの縁部を外側か
ら覆うように重ねられ、前記下地側防水シートの前記下
地に向けられた下面に形成された通気溝と、前記重ね部
下面の連通溝とが通気可能に連通されていることを特徴
とする。下地側の防水シートの縁部に対して、防水シー
トの重ね部を重ね合わせた際に、重ね部側の連通溝の位
置を、下地側の防水シートの通気溝に対して調整して連
通させることで、接合する両防水シート下面の通気溝間
を通気可能に容易に連通させることができる。これによ
り、下地から発生する水蒸気等のガスを排気するための
流路が、互いに連通された通気溝によって形成される。According to a seventh aspect of the present invention, there is provided a joint structure of a waterproof sheet for joining a plurality of waterproof sheets covering a foundation made of concrete or the like, wherein the overlapping portion of the waterproof sheet according to the second or third aspect is provided with The ventilation groove formed on the lower surface of the base waterproof sheet facing the base and the communication groove on the lower surface of the overlapped portion communicate with each other so as to allow ventilation. It is characterized by having been done. When the overlapping portion of the waterproof sheet is overlapped with the edge of the waterproof sheet on the ground side, the position of the communication groove on the overlapping portion side is adjusted to communicate with the ventilation groove of the waterproof sheet on the ground side. Thereby, it is possible to easily communicate between the ventilation grooves on the lower surfaces of both waterproof sheets to be joined so as to be able to ventilate. Thus, a flow path for exhausting a gas such as water vapor generated from the base is formed by the ventilation grooves communicating with each other.

【００１３】請求項８記載の防水施工方法は、請求項１
から３のいずれかに記載の防水シートの重ね部を下地側
の防水シートの縁部に外側から覆うようにして重ねるこ
とで、各防水シートに設けられている導電体層を積層状
態として両防水シートを接合し、これら接合された防水
シート上に液状防水材を塗装してなる防水塗膜を形成し
た後、前記防水塗膜表面に配置した電極と前記防水シー
トの導電体層との間に作用させた電圧による放電発生個
所を検出することを特徴とする。この防水施工方法で
は、防水シート上に形成された防水塗膜上に配置した電
極と防水シートの導電体層との間の印加電圧によって放
電箇所の有無を調べることで、防水塗膜のピンホール
等、漏水の原因になるような不具合の存在の有無を確認
できる。防水シート上への液状防水材の吹き付け、塗布
等による塗装後、硬化によって形成される防水塗膜に
は、導電性が無いものかあるいは導電性の極めて小さい
層（塗膜）を形成するものが採用される。防水塗膜に充
分な膜厚が得られている場合は、この防水塗膜上に配置
した電極と防水シートの導電体層との間が防水塗膜によ
って電気的に絶縁され、ピンホールや何等かの原因で形
成された傷等、防水塗膜の存在しない箇所等では、印加
電圧によって、電極と導電体層との間に放電が生じるよ
うにする。これにより、前記放電の発生を検出すること
で、前記ピンホール等の不具合箇所の存在を検出でき
る。前記電極の設置位置を変更して、防水塗膜全体にわ
たって放電箇所の有無を調べた結果、何処にも放電箇所
が発見されなければ、防水塗膜全体にピンホールや傷等
の不具合箇所が無い塗膜層が確保されていることが判
る。また、発見された不具合箇所を補修することで、広
大な面積に形成された防水塗膜であっても、その全体に
優れた防水性能を確実に確保できる。[0013] The waterproof construction method according to the eighth aspect is the first aspect.
3. The waterproofing sheet according to any one of 1 to 3 is overlapped so as to cover the edge of the waterproofing sheet on the base side from the outside so that the conductor layers provided on the respective waterproofing sheets are laminated to form a waterproof state. After joining the sheets and forming a waterproof coating formed by coating a liquid waterproof material on these joined waterproof sheets, between the electrode disposed on the surface of the waterproof coating and the conductor layer of the waterproof sheet. It is characterized in that a place where a discharge is generated by the applied voltage is detected. In this waterproofing method, the presence or absence of a discharge point is checked by applying a voltage between an electrode disposed on the waterproof coating formed on the waterproofing sheet and a conductor layer of the waterproofing sheet. The presence or absence of a defect that may cause water leakage can be confirmed. After coating by spraying, applying, etc., the liquid waterproofing material onto the waterproofing sheet, the waterproof coating formed by curing may be non-conductive or one that forms an extremely conductive layer (coating). Adopted. If the waterproof coating has a sufficient thickness, the waterproof coating electrically insulates between the electrodes disposed on the waterproof coating and the conductor layer of the waterproof sheet, and prevents pinholes or any other matter. In places where the waterproof coating film does not exist, such as scratches formed by such a cause, discharge is caused between the electrode and the conductive layer by the applied voltage. Thus, by detecting the occurrence of the discharge, it is possible to detect the presence of a defective portion such as the pinhole. By changing the installation position of the electrode, as a result of examining the presence or absence of a discharge location over the entire waterproof coating, if no discharge location is found anywhere, there is no defective portion such as a pinhole or a scratch in the entire waterproof coating. It can be seen that the coating layer is secured. In addition, by repairing the found defective portion, even if the waterproof coating film is formed in a large area, excellent waterproof performance can be surely secured on the whole.

【００１４】ところで、例えばビル屋上等の下地上に複
数枚敷き並べた防水シート上に形成した防水塗膜の不具
合箇所の有無を調べるには、各防水シートの導電体層間
に通電性を確保して、電極に対して連続する一枚の導電
体層の如く機能させることが、より広範囲に形成された
防水塗膜のピンホール等の不具合箇所の検出を効率良く
行う上で好ましい。そこで、本発明では、一方の防水シ
ートの重ね部を下地上の防水シートの縁部に重ねて防水
シート同士を接合し、各防水シートの導電体層を積層状
態にする構成を採用する。これにより、重ね部のテーパ
形状によって各防水シートの導電体層同士が接近して積
層されることになるから、防水シートの導電体層と電極
との間に電圧を印加すると、接合された防水シートの導
電体層間の漏れ電流によって導電体層同士を通電させる
ことができ、接合された複数毎の防水シートの導電体層
を、電極に対して、連続する一枚の導電体層の如く機能
させることができる。その結果、例えば、防水シートの
導電体層と電極との間に電圧を印加したまま、前記電極
を防水塗膜表面に沿って移動させて、放電箇所や漏れ電
流の発生（あるいは漏れ電流の変化）の有無を調べるこ
とで、ピンホール等の不具合箇所を、防水シートの境界
に関係無く連続的に効率良く検出できる。検出された不
具合箇所は、液状防水材やその他の補修材を用いて補修
する。これにより、防水塗膜に優れた防水性能を確実に
得ることができる。For examining the presence or absence of a defective portion of a waterproof coating formed on a plurality of waterproof sheets laid on the lower ground of a building roof or the like, for example, it is necessary to ensure electrical conductivity between the conductor layers of each waterproof sheet. Thus, it is preferable that the electrode functions as a single continuous conductive layer in order to efficiently detect a defective portion such as a pinhole of the waterproof coating formed over a wider area. Therefore, in the present invention, a configuration is adopted in which the overlapped portion of one waterproof sheet is overlapped on the edge of the waterproof sheet on the base, the waterproof sheets are joined, and the conductor layer of each waterproof sheet is laminated. As a result, the conductor layers of each waterproof sheet are laminated close to each other due to the tapered shape of the overlapping portion. Therefore, when a voltage is applied between the conductor layers of the waterproof sheet and the electrodes, the joined waterproof sheets are formed. The conductive layers can be electrically connected to each other by a leakage current between the conductive layers of the sheet, and the conductive layers of the plurality of waterproof sheets joined together function as a single continuous conductive layer with respect to the electrodes. Can be done. As a result, for example, while applying a voltage between the conductor layer of the waterproof sheet and the electrode, the electrode is moved along the surface of the waterproof coating film to generate a discharge location or a leakage current (or a change in the leakage current). By checking the presence or absence of), a defective portion such as a pinhole can be continuously and efficiently detected regardless of the boundary of the waterproof sheet. Detected faults are repaired using liquid waterproofing material or other repair materials. Thereby, it is possible to reliably obtain excellent waterproof performance of the waterproof coating film.

【００１５】[0015]

【発明の実施の形態】以下、本発明の実施の形態を、図
１から図７を参照して説明する。図１および図２に示す
防水シート１０（防水緩衝シート）は、樹脂繊維等から
なる基布１１に、アスファルトやゴムアスファルト等か
らなるエラストマー層１２を被着して形成されている。
そして、この防水シート１０は、エラストマー層１２を
下地１３側に向けて該下地１３を覆うように敷設され
る。図１において、下地１３上面は、ほぼ水平な床面を
形成しており、この下地１３上に敷き込んだ複数枚の防
水シート同士を接合することで防水される。また、敷設
された防水シート１０上には、例えばウレタン樹脂等か
らなる液状防水材の、吹き付け、塗布等により防水塗膜
が形成され、この防水塗膜と前記防水シート１０とによ
って防水層が形成される。防水シート１０の下地１３へ
の固定は、該防水シート１０貫通して下地１３に打ち込
まれるアンカーピン等によってなされる。基布１１やエ
ラストマー層１２としては、アンカーピンが貫通可能な
ものが採用される。また、下地１３としては、コンクリ
ートが一般的である。DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. The waterproof sheet 10 (waterproof buffer sheet) shown in FIGS. 1 and 2 is formed by applying an elastomer layer 12 made of asphalt or rubber asphalt to a base cloth 11 made of resin fiber or the like.
Then, the waterproof sheet 10 is laid so as to cover the base 13 with the elastomer layer 12 facing the base 13. In FIG. 1, the upper surface of the base 13 forms a substantially horizontal floor surface, and is waterproofed by joining a plurality of waterproof sheets laid on the base 13. On the laid waterproof sheet 10, a waterproof coating is formed by spraying, applying, or the like of a liquid waterproof material made of, for example, urethane resin, and a waterproof layer is formed by the waterproof coating and the waterproof sheet 10. Is done. The waterproof sheet 10 is fixed to the base 13 by an anchor pin or the like which penetrates the waterproof sheet 10 and is driven into the base 13. As the base cloth 11 and the elastomer layer 12, a material through which an anchor pin can be penetrated is adopted. As the base material 13, concrete is generally used.

【００１６】エラストマー層１２は防水性を有するもの
であり、その厚さは数ｍｍ程度、好ましくは２ｍｍ前後
である。また、エラストマー層１２の下地１３に向けら
れる下面側（防水シート下面側）には、突部１４が多数
形成され、これら突部１４間に形成される通気溝１５が
エラストマー層１２下面全体に網目状に延在形成されて
いる。前記突部１４や通気溝１５は、例えば、型付きの
ロールを用いて防水シート１０をロール成形する際に、
前記ロールの型をエラストマー層１２に圧接することで
形成される。図１、図２において、前記突部１４は亀甲
状になっているが、これに限定されず、突部１４の形状
は、円形、長方形状、菱形等、各種採用可能である。な
お、ゴムアスファルト等のエラストマーからなるエラス
トマー層１２は弾力性を有するため、下地１３上に敷き
込まれた状態では、例えば、防水シート１０上の人の歩
行等によって発生する衝撃を突部１４の弾性変形によっ
て吸収して緩衝することができる。これにより、防水シ
ート１０は緩衝シートとしても優れた性能を発揮する。
通気溝１５は、突部１４の弾性変形を容易にするための
空間としても機能する。また、基布１１としては、前記
エラストマー層１２やウレタン樹脂等からなる液状防水
材の付着性を確保することに鑑みて、ポリエステル不織
布からなるもの等が採用される。The elastomer layer 12 is waterproof and has a thickness of about several mm, preferably about 2 mm. On the lower surface of the elastomer layer 12 facing the base 13 (the lower surface of the waterproof sheet), a number of projections 14 are formed, and a ventilation groove 15 formed between the projections 14 is meshed on the entire lower surface of the elastomer layer 12. It is formed so as to extend in a shape. The protrusions 14 and the ventilation grooves 15 are formed, for example, when the waterproof sheet 10 is roll-formed using a mold roll.
It is formed by pressing the roll mold against the elastomer layer 12. 1 and 2, the protrusion 14 has a tortoiseshell shape, but is not limited thereto. The shape of the protrusion 14 may be various shapes such as a circle, a rectangle, and a rhombus. In addition, since the elastomer layer 12 made of an elastomer such as rubber asphalt has elasticity, when the elastomer layer 12 is laid on the base 13, for example, an impact generated by walking of a person on the waterproof sheet 10 or the like is generated by the projection 14. It can be absorbed and buffered by elastic deformation. Thereby, the waterproof sheet 10 exhibits excellent performance as a buffer sheet.
The ventilation groove 15 also functions as a space for facilitating the elastic deformation of the projection 14. In addition, as the base cloth 11, a cloth made of a polyester nonwoven fabric or the like is adopted in view of securing the adhesion of the liquid waterproof material made of the elastomer layer 12 or urethane resin or the like.

【００１７】防水シート１０の縁部には、別の防水シー
トの縁部に重ね合わされる重ね部１６が設けられてい
る。この重ね部１６は、防水シート１０の端面１７から
１０〜２０ｃｍの幅寸法ｔを以て縁部に沿って帯状に延
在されており、シート面方向中央部側から外側（端面方
向）へ行くに従って次第に厚さ寸法が縮小するテーパ状
になっている。本実施の形態では、重ね部１６では、基
布１１の厚さは変化せず、エラストマー層１２の厚さの
みが変化してテーパ状に形成されている。防水シート端
面１７近傍では、エラストマー層１２は厚さは殆ど無
い。At the edge of the waterproof sheet 10, there is provided an overlapping portion 16 which is overlapped with the edge of another waterproof sheet. The overlapping portion 16 extends in a band shape along the edge with a width t of 10 to 20 cm from the end face 17 of the waterproof sheet 10, and gradually goes from the center in the sheet surface direction to the outside (toward the end surface). It is tapered to reduce the thickness dimension. In the present embodiment, the thickness of the base fabric 11 does not change in the overlapping portion 16, and only the thickness of the elastomer layer 12 changes to form a tapered shape. Near the end face 17 of the waterproof sheet, the elastomer layer 12 has almost no thickness.

【００１８】重ね部１６の防水シート１０中央部側に位
置する基端部１８の前記下地１３に向けられる下面側に
は、防水シート１０下面の通気溝１５と連通されている
連通溝１９ａ、１９ｂ（図２参照）が形成されている。
前記基端部１８には、具体的には２種類の連通溝１９
ａ、１９ｂが設けられており、一方の連通溝１９ａは、
エラストマー層１２の下面側にて防水シート１０縁部の
延在方向に垂直に伸びる溝であって、防水シート１０縁
部に沿って並列に多数連設されている。他方の連通溝１
９ｂは、防水シート１０下面側にて、連通溝１９ａに対
して防水シート１０面方向外側に隣接する連通領域１９
ｃに多数突設された小突起１９ｄ間に確保された溝であ
り、前記連通溝１９ａを介して通気溝１５と連通されて
いる。なお、シート基端部１８に形成される連通溝は、
図２に例示した連通溝１９ａ、１９ｂに限定されず、他
の構成も採用可能であることは言うまでも無い。但し、
連通溝としては、通気溝１５と連通されている構成が採
用される。また、基端部１８に形成される連通溝として
は、図２に例示した連通溝１９ａ、１９ｂの一方のみで
あっても良く、以下の説明において、基端部１８下面側
に設けられる連通溝１９ａ、１９ｂを「連通溝１９」と
総称することもある。図１、図２において、各連通溝１
９ａの長さは２０〜３０ｍｍ程度になっているが、これ
に限定されず、例えば、連通溝１９ａは防水シート端面
１７にまで到達させ、連通溝１９ｂを省略しても良い。On the lower surface side of the base end portion 18 located at the center portion of the waterproof sheet 10 of the overlapping portion 16 facing the base 13, communication grooves 19a, 19b communicating with the ventilation grooves 15 on the lower surface of the waterproof sheet 10 are provided. (See FIG. 2).
Specifically, the base end portion 18 has two types of communication grooves 19.
a and 19b are provided, and one communication groove 19a is
The groove extends vertically on the lower surface side of the elastomer layer 12 in the extending direction of the edge of the waterproof sheet 10, and is formed in a large number in a row along the edge of the waterproof sheet 10. The other communication groove 1
9b is a communication area 19 on the lower surface side of the waterproof sheet 10 adjacent to the communication groove 19a on the outer side in the surface direction of the waterproof sheet 10.
These grooves are provided between a number of small projections 19d protruding from the groove c and communicate with the ventilation groove 15 via the communication groove 19a. The communication groove formed in the seat base end portion 18 is
Needless to say, the present invention is not limited to the communication grooves 19a and 19b illustrated in FIG. However,
As the communication groove, a configuration communicating with the ventilation groove 15 is employed. In addition, the communication groove formed in the base end portion 18 may be only one of the communication grooves 19a and 19b illustrated in FIG. 2, and in the following description, the communication groove provided on the lower surface side of the base end portion 18 19a and 19b may be collectively referred to as “communication grooves 19”. 1 and 2, each communication groove 1
The length of 9a is about 20 to 30 mm, but is not limited thereto. For example, the communication groove 19a may reach the end face 17 of the waterproof sheet, and the communication groove 19b may be omitted.

【００１９】以下、本発明に係る防水シートの接合構造
の実施の形態を実施例を用いて説明する。Hereinafter, embodiments of the waterproof sheet joining structure according to the present invention will be described with reference to examples.

【００２０】（第１実施例）図３は、防水シート１０の
重ね部１６同士の接合構造を模式的に示す図であって、
（ａ）は平面図、（ｂ）は同じ形状の重ね部１６同士を
略一致させて重ね合わせた状態を示す正断面図、（ｃ）
は防水シート１０の重ね部１６の先端部近傍のみを重ね
合わせた状態を示す正断面図である。図３（ａ）、
（ｂ）に示すように、同じ形状（幅寸法ｔや、厚さ寸法
の変化等が同じ）の重ね部１６同士を略一致させて重ね
合わせると、重ね部１６同士が重ね合わされた接合部２
１の全体が防水シート１０と略同じ厚さ寸法となるた
め、防水シート１０同士を段差を生じること無くほぼ面
一に接合できる。(First Embodiment) FIG. 3 is a diagram schematically showing a joint structure between overlapping portions 16 of a waterproof sheet 10,
(A) is a plan view, (b) is a front cross-sectional view showing a state in which overlapping portions 16 of the same shape are substantially aligned and overlapped, and (c).
Is a front sectional view showing a state in which only the vicinity of the tip end of the overlapping portion 16 of the waterproof sheet 10 is overlapped. FIG. 3 (a),
As shown in (b), when the overlapping portions 16 having the same shape (the same change in the width dimension t, the thickness dimension, and the like) are substantially coincident with each other and overlapped, the joining portion 2 in which the overlapping portions 16 are overlapped with each other.
Since the entirety 1 has substantially the same thickness dimension as the waterproof sheet 10, the waterproof sheets 10 can be joined almost flush with each other without generating a step.

【００２１】接合部２１では、一方の防水シート１０
（以下、これを説明の便宜上防水シート１０ａとする）
下地１３側の重ね部１６上に、別の防水シート１０（以
下、これを説明の便宜上防水シート１０ｂとする）の重
ね部１６を重ね合わせる。接合される両防水シート１０
ａ、１０ｂはいずれも、エラストマー層１２を下地１３
側に向けて敷き込まれるので、下地１３側の重ね部１６
の基布１１上に別の防水シート１０ｂの重ね部１６のエ
ラストマー層１２が重ねられることとなる。At the junction 21, one of the waterproof sheets 10
(Hereinafter, this is referred to as a waterproof sheet 10a for convenience of explanation.)
The overlapping portion 16 of another waterproof sheet 10 (hereinafter, referred to as a waterproof sheet 10b for convenience of description) is overlapped on the overlapping portion 16 on the base 13 side. Both waterproof sheets 10 to be joined
a and 10b each have the elastomer layer 12 as the base 13
Side, so that the overlapping portion 16 on the base 13 side
The elastomer layer 12 of the overlapping portion 16 of another waterproof sheet 10b is overlaid on the base cloth 11 of FIG.

【００２２】アスファルトやゴムアスファルト等からな
るエラストマー層１２は自着性を有するため、防水シー
ト１０ａ上に別の防水シート１０ｂの重ね部１６のエラ
ストマー層１２を重ねると、半接着状態となって位置ず
れを生じにくくなり、位置決め後、防水シート１０ａ、
１０ｂのアンカーピン等による固定作業を行うまでの位
置ずれが防止される。また、エラストマー層１２が接触
する相手側に対して密着するため、接合部２１の防水性
が確保されることは言うまでも無い。重ね合わせた重ね
部１６同士は、接着剤により接着しても良い。また、重
ね部１６同士を重ね合わせた境界２２（防水シート１０
ｂの端面１７と防水シート１０ａとの境界）は、別途シ
ール材等により止水しておくことが好ましい。このシー
ル材によって、防水シート１０ｂの端面１７と下地１３
側の防水シート１０ａとの間の段差を埋めることで、段
差を完全に無くすことも容易である。Since the elastomer layer 12 made of asphalt, rubber asphalt or the like has a self-adhesive property, when the elastomer layer 12 of the overlapping portion 16 of another waterproof sheet 10b is placed on the waterproof sheet 10a, a semi-adhesive state is obtained. Displacement is less likely to occur, and after positioning, the waterproof sheet 10a,
The displacement before the fixing work by the anchor pin 10b or the like is performed is prevented. In addition, since the elastomer layer 12 comes into close contact with the contacting side, it goes without saying that the waterproofness of the joint portion 21 is ensured. The overlapped portions 16 may be adhered to each other with an adhesive. In addition, the boundary 22 (the waterproof sheet 10) in which the overlapping portions 16 are overlapped with each other.
The boundary between the end face 17 b and the waterproof sheet 10 a) is preferably stopped by a separate sealing material or the like. With this sealing material, the end face 17 of the waterproof sheet 10b and the base 13
It is also easy to completely eliminate the step by filling the step between the side waterproof sheet 10a.

【００２３】図４に示す接合構造は、下地１３側に配置
される防水シート１０ａの重ね部１６を、該重ね部１６
を貫通して下地１３に打ち込まれるアンカーピン２９に
よって下地１３に固定し、前記防水シート１０ａの重ね
部１６上に防水シート１０ｂの重ね部１６を重ねたもの
である。アンカーピン２９のフランジ部２９ａは、下地
１３側の防水シート１０ａの重ね部１６上に配置される
ため、このフランジ部２９ａによって重ね部１６が下地
１３に対して浮き上がらないように押え込まれる。防水
シート１０ａ、１０ｂの重ね部１６同士の重ね合わせに
よって、アンカーピン２９打ち込み位置を隠蔽すると、
アンカーピン２９を衝撃力等の外力の作用や天候の変化
等から保護することができる。さらに、接合部２１ａ
は、重ね部１６同士の重ね合わせによって密閉され、優
れた防水性を容易にかつ確実に確保できるから、シール
材の注入等の特別な作業を行うこと無くアンカーピン２
９の打ち込み位置近傍の防水性を容易に確保できるとい
った利点もある。重ね部１６間は、接着剤やシール材を
用いて密閉することで、優れた防水性を容易に確保でき
る。なお、アンカーピン２９打ち込み位置を外側から覆
うようにして隠蔽した重ね部１６は、エラストマー層１
２のクッション性能によって重ね部１６上のフランジ部
２９ａの厚みやアンカーピン２９のその他の突出部等を
吸収できるため、この重ね部１６の表面側には段差や凹
凸等の少ない（あるいは全く存在しない）滑らかな面が
得られる。これにより、この防水シート１０ａ、１０ｂ
上に形成される防水塗膜に平坦な面を得ることも容易で
ある。In the joining structure shown in FIG. 4, the overlapping portion 16 of the waterproof sheet 10 a
Is fixed to the base 13 by an anchor pin 29 which is driven into the base 13 through the base member 13 and the overlapping part 16 of the waterproof sheet 10b is overlapped on the overlapping part 16 of the waterproof sheet 10a. Since the flange portion 29a of the anchor pin 29 is disposed on the overlapping portion 16 of the waterproof sheet 10a on the base 13 side, the overlapping portion 16 is pressed by the flange portion 29a so as not to float on the base 13. When the position where the anchor pin 29 is driven is concealed by overlapping the overlapping portions 16 of the waterproof sheets 10a and 10b,
The anchor pin 29 can be protected from the action of an external force such as an impact force or a change in weather. Further, the joint 21a
Is sealed by the overlapping of the overlapping portions 16, and excellent waterproofness can be easily and reliably secured. Therefore, the anchor pin 2 can be used without performing a special operation such as injection of a sealing material.
There is also an advantage that waterproofness near the driving position of No. 9 can be easily secured. By sealing between the overlapping portions 16 using an adhesive or a sealing material, excellent waterproofness can be easily secured. The overlapping portion 16 concealed so as to cover the anchor pin 29 driving position from the outside is the elastomer layer 1
Since the thickness of the flange portion 29a on the overlapping portion 16 and other protrusions of the anchor pin 29 can be absorbed by the cushioning performance of 2, the surface side of the overlapping portion 16 has few steps or irregularities (or does not exist at all). ) A smooth surface is obtained. Thereby, the waterproof sheets 10a, 10b
It is also easy to obtain a flat surface on the waterproof coating formed thereon.

【００２４】例えば、防水シート１０ａ、１０ｂを下地
１３に固定するアンカーピン２９の打ち込みを、全て、
接合部２１ａを利用して行うようにすると、アンカーピ
ン２９を一切露出させること無く、防水シート１０ａ、
１０ｂを下地１３に固定できる。しかも、前述のよう
に、接合部２１ａではアンカーピン２９を保護できると
ともに、打ち込み位置の防水性の確保も容易であるか
ら、複数枚の防水シートを接合してなる防水覆工層全体
として優れた防水性能が確保される。この場合、防水シ
ート１０ａ、１０ｂの接合部２１ａ間に位置する部分
は、下地１３に一体的に固定する必要は無く、下地１３
に対して若干の変位を許容しておくことも可能である。
防水シート１０ａ、１０ｂの接合部２１ａ間に位置する
部分が下地１３に対して変位可能であると、下地１３の
変形が防水シート１０ａ、１０ｂに伝達されるおそれが
無く、防水シート１０ａ、１０ｂ上に形成された防水塗
膜の変形、ひび割れの発生等を回避でき、優れた防水性
能を維持できる。For example, the driving of the anchor pins 29 for fixing the waterproof sheets 10a and 10b to the ground 13
When this is performed using the joint 21a, the waterproof sheet 10a,
10 b can be fixed to the base 13. In addition, as described above, since the anchor portion 29 can be protected at the joint portion 21a and the waterproofing property at the driving position can be easily secured, the entire waterproof lining layer formed by joining a plurality of waterproof sheets is excellent. Waterproof performance is ensured. In this case, the portions of the waterproof sheets 10a and 10b located between the joints 21a do not need to be integrally fixed to the base 13,
It is also possible to allow some displacement with respect to.
If the portion of the waterproof sheets 10a and 10b located between the joints 21a is displaceable with respect to the base 13, the deformation of the base 13 will not be transmitted to the waterproof sheets 10a and 10b. In this way, it is possible to avoid deformation and cracking of the waterproof coating film formed on the substrate and maintain excellent waterproof performance.

【００２５】防水シート１０ａの下面全面、防水シート
１０ｂの重ね部１６を除く下面全面は、下地１３に接触
したエラストマー層１２が、該エラストマー層１２の自
着性により、いわば半接着の状態となり、位置ずれが防
止される。防水シート１０ａ、１０ｂの重ね部１６は、
防水シート１０ａ、１０ｂの本体部２４に比べてエラス
トマー層１２が薄く、柔軟性に優れているため、防水シ
ート１０ａの重ね部１６は下地１３に追従するようにし
て変形して密接し、防水シート１０ｂの重ね部１６は防
水シート１０ａの重ね部１６上に追従するようにして変
形して密接する。On the entire lower surface of the waterproof sheet 10a and the entire lower surface of the waterproof sheet 10b except for the overlapping portion 16, the elastomer layer 12 in contact with the base 13 is in a semi-adhered state due to the self-adhesiveness of the elastomer layer 12, Position shift is prevented. The overlapping portion 16 of the waterproof sheets 10a and 10b
Since the elastomer layer 12 is thinner and more excellent in flexibility than the main body 24 of the waterproof sheets 10a and 10b, the overlapping portion 16 of the waterproof sheet 10a is deformed and closely adhered to the base 13, and The overlapping portion 16 of the waterproof sheet 10b deforms and closely contacts the overlapping portion 16 of the waterproof sheet 10a.

【００２６】ところで、防水シート１０ａ、１０ｂの重
ね部１６同士の重ね合わせ作業は、各防水シート１０
ａ、１０ｂの基布１１側を見ながらの作業となり、重ね
部基端部１８の目安となる連通溝１９を目視で確認でき
ないが、防水シート１０ａ、１０ｂ下面に対向する基布
１１表面（防水シート表面）に印刷等により設けられた
表示２３ａ、２３ｂを目安とすることで、各防水シート
１０ａ、１０ｂの重ね部１６の位置を確認できる（図３
（ａ）では、防水シート１０ｂ側の表示の図示を省略し
ている）。図３（ａ）においては、一方の表示２３ａ
は、連通溝１９に対応して基布１１表面（防水シート表
面）に設けられ、他方の表示２３ｂは表示２３ａから防
水シート端面１７方向へ数十ｍｍの所に設けられてい
る。図３（ａ）、（ｂ）に示すように、下地１３側の防
水シート１０ａの重ね部１６あるいはその近傍の基布１
１表面に互いに離間させて印刷した２本のラインである
表示２３ａ、２３ｂの間の範囲に、防水シート１０ｂの
端面１７を位置決めして重ね部１６を重ねれば、重ね部
１６同士の接合面積が確保されて充分な防水性を確保で
きるとともに、接合部２１とその両側の防水シート１０
ａ、１０ｂとの間の段差は殆ど無いか完全に解消でき
る。この接合状態では、接合した防水シート１０ａ、１
０ｂ上にウレタン樹脂等からなる液状防水材の塗装を行
うと、段差の無い、滑らかな仕上がり面を容易に得るこ
とができる。段差が無いあるいは少ないことは、液状防
水材の塗装作業自体の能率向上にも寄与する。By the way, the overlapping operation of the overlapping portions 16 of the waterproof sheets 10a and 10b is performed by the respective waterproof sheets 10a and 10b.
a, 10b, while looking at the base cloth 11 side, the communication groove 19 serving as a guide of the overlapping portion base end 18 cannot be visually confirmed, but the surface of the base cloth 11 facing the lower surface of the waterproof sheets 10a, 10b (waterproof). By using the indications 23a and 23b provided by printing or the like on the sheet surface) as a guide, the position of the overlapping portion 16 of each of the waterproof sheets 10a and 10b can be confirmed (FIG. 3).
(In (a), illustration of the display on the waterproof sheet 10b side is omitted.) In FIG. 3A, one display 23a
Is provided on the surface of the base cloth 11 (surface of the waterproof sheet) corresponding to the communication groove 19, and the other display 23b is provided at a position several tens of mm from the display 23a toward the waterproof sheet end face 17. As shown in FIGS. 3 (a) and 3 (b), the base fabric 1 in the overlapping portion 16 of the waterproof sheet 10a on the base 13 side or in the vicinity thereof.
When the end face 17 of the waterproof sheet 10b is positioned and overlapped with the overlapping portion 16 in a range between two lines 23a and 23b which are printed on one surface while being separated from each other, a joining area between the overlapping portions 16 is obtained. Is secured, sufficient waterproofness can be ensured, and the joint portion 21 and the waterproof sheets 10 on both sides thereof can be secured.
The steps between a and 10b are almost completely eliminated or completely eliminated. In this joined state, the joined waterproof sheets 10a, 1
When a liquid waterproof material made of a urethane resin or the like is applied on 0b, a smooth finished surface without steps can be easily obtained. The absence or small number of steps contributes to an improvement in the efficiency of the coating operation of the liquid waterproofing material itself.

【００２７】なお、図１に示すように、基布１１表面に
設けられた表示２３ｃも印刷等によって設けられるもの
であるが、これら表示２３ａ、２３ｂとは異なり、液状
防水材の塗装厚の目安となるものである。すなわち、こ
こでは、半透明の液状防水材を用い、表示２３ｃの隠蔽
度合いを確認することで、目的の膜厚を確保する。前記
液状防水材の塗膜を介して表示２３ｃが目視確認できる
状態では、液状防水材の塗装厚は不足であり、液状防水
材の塗装作業は、表示２３ｃを見ながら、この表示２３
ｃを目視確認出来ない程度に埋没、隠蔽して、さらに、
必要塗装厚を得ることが好ましい。これにより、液状防
水材塗膜が極端に薄い箇所の発生を防止でき、下地１３
上の床面全体に防水性を確実に確保できる。表示２３
ａ、２３ｂは、印刷以外、例えば、粘着テープの付着
や、塗料の吹き付け等によっても形成できる。As shown in FIG. 1, the display 23c provided on the surface of the base cloth 11 is also provided by printing or the like. However, unlike these displays 23a and 23b, a guide for the coating thickness of the liquid waterproof material is provided. It is what becomes. That is, here, the desired film thickness is ensured by using a translucent liquid waterproof material and confirming the degree of hiding of the display 23c. In a state where the display 23c can be visually confirmed through the coating film of the liquid waterproof material, the coating thickness of the liquid waterproof material is insufficient.
is buried and concealed to the extent that c cannot be visually confirmed,
It is preferable to obtain the required coating thickness. As a result, it is possible to prevent the liquid waterproof material coating film from being extremely thin, so
Waterproofness can be reliably ensured over the entire upper floor. Display 23
In addition to printing, a and 23b can be formed by, for example, attaching an adhesive tape or spraying a paint.

【００２８】図３（ａ）、（ｂ）に示すように、防水シ
ート１０ｂの端面１７を、防水シート１０ａの重ね部基
端部１８側の表示２３ａに合わせると、重ね部１６同士
が略一致させるようにして重ね合わされ、段差の殆ど無
い接合状態が得られる。防水シート１０ｂの端面１７
を、防水シート１０ａの端面１７側の表示２３ｂに合わ
せると、図３（ｃ）に示すように、重ね部１６の先端部
（端面１７近傍）のみが重ね合わされ、接合部２１近傍
に若干の窪みが生じるが、接合部２１とその両側の防水
シート１０ａ、１０ｂとの間では、両重ね部１６のテー
パ形状によって下地１３上のシート被着厚は緩やかに変
化し、段差は殆ど生じない。しかも、液状防水材の塗設
によって前記接合部２１を埋没させることで、段差の無
い、滑らかな仕上がり面を容易に得ることができる。段
差が少ないことは、液状防水材の塗装作業自体の能率向
上にも寄与する。なお、充分な防水性を得るには、重ね
部１６同士が重ね合わされた寸法である重ね幅（重ね合
わされた防水シート１０同士の端面１７間の距離。図３
（ｂ）の重ね幅Ｌ１、図３（ｃ）の重ね幅Ｌ２）を、７
０ｍｍ以上確保することが必要である。防水シート１０
ａに対して接合する防水シート１０ｂの重ね部１６の重
ね位置によって、重ね幅は変動する。As shown in FIGS. 3A and 3B, when the end face 17 of the waterproof sheet 10b is aligned with the display 23a on the base end 18 of the waterproof sheet 10a, the overlapping sections 16 substantially coincide with each other. Thus, a joined state with almost no step is obtained. End face 17 of waterproof sheet 10b
3C, the tip of the overlapping portion 16 (in the vicinity of the end face 17) is overlapped, and a slight depression is formed in the vicinity of the joint 21 as shown in FIG. However, between the joint portion 21 and the waterproof sheets 10a and 10b on both sides thereof, the thickness of the sheet adhered on the base 13 gradually changes due to the tapered shape of the overlapping portions 16, and almost no level difference occurs. Moreover, by burying the joint portion 21 by applying a liquid waterproof material, a smooth finished surface having no steps can be easily obtained. The small step contributes to the improvement of the efficiency of the coating operation of the liquid waterproofing material itself. In order to obtain sufficient waterproofness, the overlap width (the distance between the end faces 17 of the overlapped waterproof sheets 10; FIG. 3)
The overlap width L1 in FIG. 3B and the overlap width L2 in FIG.
It is necessary to secure 0 mm or more. Waterproof sheet 10
The overlapping width varies depending on the overlapping position of the overlapping portion 16 of the waterproof sheet 10b to be joined to a.

【００２９】さらに、大きさの違う重ね部同士を重ね合
わせる場合では、図示しないが、例えば、下地１３側の
重ね部に対して、これよりも幅寸法ｔが大きい重ね部
は、下地１３側の重ね部を越えて、この防水シートの本
体部上に乗り上げるようにして重ねられるケースが存在
するが、このような場合にも、重ね部のテーパ形状によ
って、接合部と、その両側の防水シートの本体部との間
では、シート被着厚が緩やかに変化し、段差を生じな
い。Further, although not shown, when overlapping portions having different sizes are overlapped, for example, an overlapping portion having a width dimension t larger than the overlapping portion on the base 13 side is not shown. There are cases where the waterproof sheet is overlapped so as to ride on the main body of the waterproof sheet beyond the overlapping section.In such a case, the tapered shape of the overlapping section also causes the joint section and the waterproof sheet on both sides thereof to be overlapped. The thickness of the sheet adhered to the main body gradually changes, and no step is formed.

【００３０】この接合構造は、接合する防水シート１０
ａ、１０ｂのテーパ状の重ね部１６同士を、下地１３に
積層するようにして重ね合わせて接合するものであり、
しかも、図３（ｂ）、（ｃ）の比較から判るように、同
等の形状の重ね部１６同士が完全には一致されず、両重
ね部１６の一部のみが重ね合わされた接合状態でも、下
地１３側の防水シート１０ａ縁部と、これに重ね合わさ
れた防水シート１０ｂの重ね部１６との間には隙間が生
じず、優れた防水性が確実に得られる。このため、防水
シート１０ａ、１０ｂの位置関係によって、防水シート
１０ａ、１０ｂ同士の重ね幅が変動しても、表示２３
ａ、２３ｂ間の範囲を逸脱する程度に重ね幅が異常に大
きくなったり、異常に少なくなったりしない限りでは、
防水シート１０ａ、１０ｂの切断等による寸法再調整を
行うこと無く接合作業を進めることができ、しかも、優
れた防水性が確実に得られる。The joining structure is similar to the waterproof sheet 10 to be joined.
a, 10b are overlapped and joined by laminating the tapered overlap portions 16 on the base 13;
Moreover, as can be seen from the comparison between FIGS. 3B and 3C, even when the overlapping portions 16 having the same shape are not completely coincident with each other and only a part of both overlapping portions 16 are overlapped, There is no gap between the edge of the waterproof sheet 10a on the base 13 side and the overlapping portion 16 of the waterproof sheet 10b overlapped with the edge, so that excellent waterproofness can be reliably obtained. For this reason, even if the overlapping width of the waterproof sheets 10a and 10b fluctuates due to the positional relationship between the waterproof sheets 10a and 10b, the display 23 is displayed.
Unless the overlap width is abnormally large or abnormally small enough to deviate from the range between a and 23b,
The joining operation can be performed without re-adjusting the dimensions of the waterproof sheets 10a and 10b by cutting or the like, and excellent waterproofness can be reliably obtained.

【００３１】（第２実施例）図５（ａ）、（ｂ）、
（ｃ）に示すように、本実施例の接合構造では、下地１
３側の防水シート２７の縁部２７ｂに対して、これを覆
うようにして防水シート１０の重ね部１６を重ね合わせ
るようにして接合しているが、防水シート２７の縁部２
７ｂから該防水シート２７の本体部２７ａまでは厚さ寸
法一定になっている。防水シート２７は、重ね部を有し
ていない点のみが防水シート１０と異なり、他の構成は
防水シート１０と同じになっている。防水シート２７の
縁部２７ｂと、防水シート１０の重ね部１６との間は、
接着剤を用いて接着しても良い。(Second Embodiment) FIGS. 5A, 5B,
As shown in (c), in the joint structure of the present embodiment, the underlayer 1
The overlapping portion 16 of the waterproof sheet 10 is joined to the edge 27b of the waterproof sheet 27 on the third side so as to cover the edge 27b of the waterproof sheet 27.
The thickness dimension is constant from 7b to the main body portion 27a of the waterproof sheet 27. The waterproof sheet 27 differs from the waterproof sheet 10 only in that the waterproof sheet 27 does not have an overlapping portion, and the other configuration is the same as the waterproof sheet 10. Between the edge 27b of the waterproof sheet 27 and the overlapping portion 16 of the waterproof sheet 10,
The bonding may be performed using an adhesive.

【００３２】防水シート２７の縁部２７ｂの基布１１上
には、線状の表示２３ｄが設けられている。両防水シー
ト１０、２７の縁部同士を重ね合わせてなる接合部２８
では、防水シート１０の端面１７を前記表示２３ｄの近
傍として、この防水シート１０の重ね部１６を重ね合わ
せる。これにより、防水シート２７の通気溝１５と、防
水シート１０の連通溝１９とが互いに近接し、連通溝１
９を介して、両防水シート１０、２７の通気溝１５同士
が通気可能に連通する。これにより、下地１３から発生
する水蒸気や、下地１３上に塗布される水性系ボンドか
ら発生するガス等の各種ガスを、防水シート１０、２７
と下地１３との間から図示しない脱気装置に導いて排気
する流路が、連通された通気溝１９によって形成するこ
とができる。同様にして、通気溝が連通するようにし
て、多数の防水シートを連続的に接合すると、各防水シ
ート下面側のガスの脱気を効率良く行うことができ、し
かも、複数の防水シートで一つの脱気装置を共用するこ
とで、脱気装置の設置数を削減できるといった効果も得
られる。A linear display 23d is provided on the base cloth 11 at the edge 27b of the waterproof sheet 27. Joint 28 formed by overlapping edges of both waterproof sheets 10 and 27
Then, the overlapping portion 16 of the waterproof sheet 10 is overlapped with the end face 17 of the waterproof sheet 10 near the display 23d. Thereby, the ventilation groove 15 of the waterproof sheet 27 and the communication groove 19 of the waterproof sheet 10 approach each other, and the communication groove 1
Via 9, the ventilation grooves 15 of both waterproof sheets 10 and 27 communicate with each other in a permeable manner. Thereby, various gases such as water vapor generated from the base 13 and gas generated from the aqueous bond applied on the base 13 are supplied to the waterproof sheets 10 and 27.
A flow path that guides and exhausts air from the space between the substrate 13 and the base 13 to a deaerator (not shown) can be formed by the communicating ventilation groove 19. Similarly, when a large number of waterproof sheets are continuously joined so that the ventilation grooves communicate with each other, the gas on the lower surface side of each waterproof sheet can be efficiently degassed. By sharing one deaerator, the effect of reducing the number of deaerators to be installed can be obtained.

【００３３】防水シート２７の縁部２７ｂに対する防水
シート１０の重ね部１６の重ね位置が、防水シート端面
１７が表示２３ｄから数ｍｍの範囲であれば、通気溝１
５同士を通気可能に連通させることが可能である。防水
シート１０、２７同士の重ね幅（重ね合わされた防水シ
ート１０、２７同士の端面１７、２７ｃ間の距離）を７
０ｍｍ以上確保すれば、防水シート１０、２７同士の接
合部に防水性能が確保されることは言うまでも無い。し
かも、防水シート１０の重ね部１６のテーパ形状によっ
て、接合部２８と、この接合部２８の両側の防水シート
１０、２７の本体部２４、２７ａとの間では、下地１３
上のシート被着厚が緩やかに変化するため、優れた美観
が得られるとともに、人の歩行等の邪魔にならない。If the overlapping position of the overlapping portion 16 of the waterproof sheet 10 with respect to the edge portion 27b of the waterproof sheet 27 is within a range of several mm from the display surface 23d of the waterproof sheet 17, the ventilation groove 1
5 can communicate with each other in a ventilable manner. The overlap width of the waterproof sheets 10 and 27 (the distance between the end faces 17 and 27c of the overlapped waterproof sheets 10 and 27) is set to 7
Needless to say, if the distance is set to 0 mm or more, the waterproof performance is secured at the joint between the waterproof sheets 10 and 27. In addition, due to the tapered shape of the overlapping portion 16 of the waterproof sheet 10, the base material 13 is formed between the joint 28 and the main bodies 24 and 27 a of the waterproof sheets 10 and 27 on both sides of the joint 28.
Since the thickness of the upper sheet is gradually changed, an excellent aesthetic appearance can be obtained, and it does not hinder human walking.

【００３４】但し、防水シート２７の端面２７ｃ近傍で
は、防水シート１７の下地１３側に臨む下面に対して対
向する表面と、下地１３表面との間の位置の違いによっ
て、防水シート２７の重ね部１６に若干の段差が生じ
る。しかし、この段差は、縁部２７ｂ同士を重ね合わせ
た場合に比べて、重ね部１６のテーパ形状によって緩和
されるため、外観上、微小なものとなる。また、接合の
完了した防水シート１０、２７上にウレタン樹脂等から
なる液状防水材を塗装すると、接合部２８全体を埋没さ
せることも容易であり、前述の段差に関係無く、平坦な
仕上がり面を得ることができる。However, in the vicinity of the end surface 27c of the waterproof sheet 27, the overlapping portion of the waterproof sheet 27 is caused by the difference in position between the surface facing the lower surface of the waterproof sheet 17 facing the base 13 and the surface of the base 13. 16 has a slight step. However, since this step is alleviated by the tapered shape of the overlapping portion 16 as compared with the case where the edge portions 27b are overlapped with each other, the appearance is minute. In addition, when a liquid waterproof material made of urethane resin or the like is coated on the bonded waterproof sheets 10 and 27, it is easy to bury the entire joint portion 28, and a flat finished surface can be formed regardless of the above-described step. Obtainable.

【００３５】防水シート１０が、一側部の縁部にのみ重
ね部１６を備え、反対側の縁部に重ね部１６を備えない
構成であれば、重ね部１６を備えていない側の縁部を本
実施例記載の防水シート２７の縁部２７ｂとみなすこと
ができ、この場合には、複数の防水シート１０を接合部
２８を介して連続的に接合することが可能である。この
場合、同様の作業によって、多数の防水シート１０同士
の接合作業を効率良く進めることができ、工期の短縮等
が可能になる。また、一般的に、多数の防水シートを用
いて防水施工される施工現場では、本実施例記載の接合
部２８に加えて、前述した第１実施例記載の接合構造等
を適宜採用しつつ各種防水シート同士の接合を進めるこ
とになるが、第１、第２実施例記載の接合構造を採用す
ると、防水シート間の重ね幅の変更が可能であることか
ら、防水シートの採寸作業のやり直し等を極力少なくし
て、効率良く接合作業を進めることができ、工期の短
縮、低コスト化を実現できる。If the waterproof sheet 10 has the overlapping portion 16 only on one side edge and does not have the overlapping portion 16 on the opposite edge portion, the edge portion on the side without the overlapping portion 16 is provided. Can be regarded as the edge 27b of the waterproof sheet 27 described in the present embodiment. In this case, the plurality of waterproof sheets 10 can be continuously joined via the joint 28. In this case, by the same operation, the joining operation of the large number of waterproof sheets 10 can be efficiently advanced, and the construction period can be shortened. In general, at a construction site where waterproofing is performed using a large number of waterproof sheets, in addition to the joining portions 28 described in the present embodiment, various structures are appropriately adopted while appropriately using the joining structure described in the first embodiment. Although the joining of the waterproof sheets will be advanced, if the joining structure described in the first and second embodiments is adopted, the overlap width between the waterproof sheets can be changed, so that the measuring work of the waterproof sheet is performed again. Is minimized, and the joining operation can be performed efficiently, so that the construction period can be shortened and the cost can be reduced.

【００３６】（第３実施例）図６は、図３（ａ）〜
（ｃ）に示した接合構造により接合した防水シート１０
ａ、１０ｂ上に液状防水材の吹き付け、塗布等により防
水塗膜３０を形成した状態を示す図であって、特に接合
部２１近傍を示す断面図である。接合部２１およびその
近傍では、防水シート１０ａ、１０ｂの重ね部１６同士
の重合により段差が殆ど無いため、防水塗膜３０も段差
を生じること無く形成することができ、防水塗膜３０に
は滑らかな表面が得られる。(Third Embodiment) FIGS. 6A to 3C show the third embodiment.
The waterproof sheet 10 joined by the joining structure shown in FIG.
FIGS. 3A and 3B are views showing a state in which a waterproof coating film 30 is formed by spraying, applying, or the like of a liquid waterproof material on a and 10b; In the joint portion 21 and the vicinity thereof, there is almost no step due to polymerization of the overlapping portions 16 of the waterproof sheets 10a and 10b, so that the waterproof coating film 30 can be formed without any step difference, and the waterproof coating film 30 has a smooth surface. Surface is obtained.

【００３７】図７は、防水シート１０（防水シート１０
ａ、１０ｂ）を示す断面図である。図７において、防水
シート１０の基布１１は、アスファルトやゴムアスファ
ルト等からなるエラストマー層１２に接着される補強体
層１１ａ（ガラスクロス等）と、この補強体層１１ａ上
に積層された導電体層１１ｂと、この導電体層１１ｂ上
に積層された表布１１ｃとを接着、一体化したものであ
る。導電体層１１と補強体層１１ａとの間、導電体層１
１ｂと表布１１ｃとの間には、接着力の確保と、液状防
水材またはその塗膜の温度変化に伴う挙動を拘束するた
めの寸法安定性とを確保するためバインダー層が必要に
応じて適宜設けられる。補強体層１１ａとしては、寸法
安定性等の面からガラスクロス等を採用することが好ま
しい。導電体層１１ｂとしては、シート巻き取り時や施
工時の下地に対する馴染み性等に優れたものが適してお
り、例えば、アルミニウム箔等が採用される。アルミニ
ウム箔からなる導電体層であれば、導電体層として要求
される前述の性質を全て満たすことができる。表布１１
ｃには液状防水材の付着性も要求され、例えばウレタン
防水材に対してはポリエステル不織布からなるもの等が
採用される。なお、図７に示した防水シート１０の構造
は、前述の第１、２実施例の接合構造に用いられる防水
シートにも適用可能であることは言うまでも無い。FIG. 7 shows the waterproof sheet 10 (the waterproof sheet 10).
a and 10b) are cross-sectional views. In FIG. 7, a base fabric 11 of a waterproof sheet 10 includes a reinforcing layer 11a (glass cloth or the like) bonded to an elastomer layer 12 made of asphalt, rubber asphalt, or the like, and a conductor laminated on the reinforcing layer 11a. The layer 11b and the surface cloth 11c laminated on the conductor layer 11b are bonded and integrated. Between the conductor layer 11 and the reinforcing body layer 11a, the conductor layer 1
A binder layer is provided between the first cloth 1b and the outer cloth 11c to secure the adhesive strength and the dimensional stability for restraining the behavior of the liquid waterproofing material or its coating film due to the temperature change, if necessary. It is provided as appropriate. As the reinforcing member layer 11a, it is preferable to use a glass cloth or the like from the viewpoint of dimensional stability and the like. As the conductor layer 11b, a layer excellent in conformability to a base at the time of sheet winding or construction is suitable, and for example, aluminum foil is used. A conductor layer made of an aluminum foil can satisfy all the above-described properties required for the conductor layer. Outer cloth 11
The adhesive property of the liquid waterproof material is also required for c. For example, a urethane waterproof material made of a polyester nonwoven fabric is used. It is needless to say that the structure of the waterproof sheet 10 shown in FIG. 7 is applicable to the waterproof sheet used in the joint structure of the first and second embodiments.

【００３８】（防水施工方法）図６中、符号３１は電極
である。ウレタン防水材等からなる導電性の無い（ある
いは導電性が非常に低い）防水塗膜３０を防水シート１
０ａ、１０ｂ上に形成し、防水塗膜３０表面に近接配置
した前記電極３１と防水シート１０ａ、１０ｂの導電体
層１１ｂとの間に電圧を印加し、この印加電圧により、
例えば防水塗膜３０にピンホールが存在していれば、前
記電極３１と導電体層１１ｂとの間に放電が生じるよう
にする。したがって、この放電を電気的あるいは視覚的
に検出することで、ピンホールの存在を検出できる。ピ
ンホールに限定されず、例えば防水塗膜３０の傷等、防
水塗膜３０が確実に形成されていない不具合箇所は、電
極３１と導電体層１１ｂとの間の放電の検出により検出
できる。放電の電気的検出とは、例えば、電極３１や導
電体層１１ｂと電気的に接続され、これら電極３１と導
電体層１１ｂとの間に不具合箇所検出用の電圧を印加機
能を有する試験装置３２等から、放電発生による電流値
の変化等に基づいて、音声やランプの点滅等の報知手段
により放電発生を報知することである。また、放電の視
覚的検出とは、例えば、放電により生じるアークを目視
確認すること等である。例えば、電極３１と導電体層１
１ｂとの間に２万Ｖ程度の電圧を印加すると、前記ピン
ホール等の不具合箇所（防水塗膜３０が存在しない箇
所）にて目視容易な程度の放電アークが発生するため、
前記視覚的検出が容易になる。(Waterproofing method) In FIG. 6, reference numeral 31 denotes an electrode. A non-conductive (or very low-conductivity) waterproof coating film 30 made of a urethane waterproof material or the like is applied to the waterproof sheet 1
0a, 10b, a voltage is applied between the electrode 31 disposed close to the surface of the waterproof coating film 30 and the conductor layer 11b of the waterproof sheets 10a, 10b.
For example, if a pinhole exists in the waterproof coating film 30, a discharge is generated between the electrode 31 and the conductor layer 11b. Therefore, the presence of the pinhole can be detected by detecting this discharge electrically or visually. Not limited to the pinhole, for example, a defective portion where the waterproof coating 30 is not reliably formed such as a scratch on the waterproof coating 30 can be detected by detecting the discharge between the electrode 31 and the conductor layer 11b. The electrical detection of the discharge means, for example, a test apparatus 32 electrically connected to the electrode 31 and the conductor layer 11b and having a function of applying a voltage for detecting a defective portion between the electrode 31 and the conductor layer 11b. Accordingly, based on a change in the current value due to the occurrence of the discharge, the occurrence of the discharge is notified by a notification unit such as a sound or blinking of a lamp. The visual detection of discharge means, for example, visually confirming an arc generated by discharge. For example, the electrode 31 and the conductor layer 1
When a voltage of about 20,000 V is applied between the contact hole 1b and a defective arc such as the pinhole (a place where the waterproof coating film 30 does not exist), a discharge arc that is easily visible is generated.
The visual detection is facilitated.

【００３９】防水シート１０ａ、１０ｂの導電体層１１
ｂとの間に電圧を印加したまま接近させた前記電極３１
を防水塗膜３０表面に沿って移動すると、広範囲にわた
って防水塗膜３０のピンホール等の不具合を短時間で効
率良く検出できる。これにより、ピンホール等の微小な
不具合をも簡単に発見でき、発見した不具合箇所を補修
することで優れた防水性能を確実に得ることができる。
ところで、図６に示した接合部２１では、下地１３側の
防水シート１０ａに対して重ね合わされた防水シート１
０ｂの重ね部１６は、防水シート１０ｂの他の部分に比
べて厚さ寸法が小さいから、防水シート１０ｂの重ね部
１６の基布１１が、下地１３側の防水シート１０ａの基
布１１に接近して積層されることになる。ここで、電極
３１と導電体層１１ｂとの間に高電圧（例えば２万Ｖ程
度）を印加すると、前記接合部２１にて積層された基布
１１の導電体層１１ｂ間に漏れ電流が生じ、導電体層１
１間が通電することとなる。特に、重ね部１６の防水シ
ート１０ｂ外側への突出方向先端付近では、重ね合わせ
された防水シート１０ａ、１０ｂの基布１１同士を接近
させることができるので、確実に通電させることができ
る。これにより、接合部２１を介して接合された防水シ
ート１０ａ、１０ｂの基布１１の導電体層１１ｂが、電
極３１に対して一枚の導電体層の如く機能することにな
るから、防水シート１０ａ、１０ｂ上に形成した防水塗
膜３０表面に沿って電極３１を移動することで、防水シ
ート１０ａ、１０ｂの境界に関係無く、防水塗膜３０に
存在するピンホール等の不具合箇所を広範囲にわたって
効率良く検出できる。The conductor layer 11 of the waterproof sheets 10a and 10b
the electrode 31 approached while a voltage is applied between the electrode 31
Is moved along the surface of the waterproof coating 30, it is possible to efficiently detect a defect such as a pinhole in the waterproof coating 30 in a short time and efficiently. As a result, minute defects such as pinholes can be easily found, and excellent waterproof performance can be reliably obtained by repairing the found defects.
By the way, in the joint portion 21 shown in FIG. 6, the waterproof sheet 1 overlapped with the waterproof sheet 10a on the base 13 side.
Since the overlapping portion 16 of the waterproof sheet 10b has a smaller thickness dimension than other portions of the waterproof sheet 10b, the base cloth 11 of the overlapping portion 16 of the waterproof sheet 10b approaches the base cloth 11 of the waterproof sheet 10a on the base 13 side. It will be laminated. Here, when a high voltage (for example, about 20,000 V) is applied between the electrode 31 and the conductor layer 11b, a leakage current is generated between the conductor layers 11b of the base cloth 11 laminated at the joint 21. , Conductor layer 1
1 is energized. In particular, in the vicinity of the tip of the overlapping portion 16 in the protruding direction to the outside of the waterproof sheet 10b, the base cloths 11 of the overlapped waterproof sheets 10a and 10b can be brought close to each other, so that the electricity can be reliably supplied. As a result, the conductor layer 11b of the base cloth 11 of the waterproof sheets 10a and 10b joined via the joint 21 functions as a single conductor layer with respect to the electrode 31. By moving the electrode 31 along the surface of the waterproof coating 30 formed on the 10a and 10b, a defective portion such as a pinhole existing in the waterproof coating 30 can be widely spread regardless of the boundary between the waterproof sheets 10a and 10b. It can be detected efficiently.

【００４０】図示しないが、前記第２実施例（図５
（ａ）〜（ｃ）参照）記載の接合構造（接合部２８）に
より接合された防水シート１０、２７上に防水塗膜を形
成した場合も、この防水塗膜のピンホール等の不具合箇
所の検出は、図６の防水塗膜３０の場合と全く同様であ
る。つまり、防水シート１０、２７の基布１１の導電体
層との間に電圧を印加した電極を防水塗膜表面に沿って
移動し、前記導電体層と電極との間に生じる放電を電気
的あるいは視覚的に検出することで、防水塗膜のピンホ
ール等の防水塗膜３０の存在しないような不具合箇所を
簡単に検出できる。図５（ａ）〜（ｃ）に示す接合部２
８でも、防水シート１０の重ね部１６の基布１１が、前
記重ね部１６のテーパ形状によって前記防水シート１０
の他の部分に比べて下地１３側の防水シート２７の基布
１１に接近するため、防水シート１０、２７上の防水塗
膜表面に配置した電極と防水シート１０、２７の基布１
１の導電体層との間の印加電圧（例えば２万Ｖ程度の高
電圧）によって防水シート１０、２７の基布１１の導電
体層間が通電され、複数枚の防水シート１０、２７の基
布１１の導電体層が、電極に対して連続する一枚の導電
体層の如く機能することになり、防水シート１０、２７
の境界に関係無く、ピンホール等の不具合個所（ここで
は、防水塗膜の存在しない箇所）を効率良く検出でき
る。Although not shown, the second embodiment (FIG. 5)
(See (a) to (c).) Even when a waterproof coating is formed on the waterproof sheets 10 and 27 joined by the joining structure (joining portion 28) described in (1) to (2), defective portions such as pinholes of the waterproof coating are formed. The detection is exactly the same as in the case of the waterproof coating film 30 in FIG. That is, the electrode, to which a voltage has been applied, between the waterproof layers 10 and 27 and the conductive layer of the base cloth 11 moves along the surface of the waterproof coating film, and discharge generated between the conductive layer and the electrodes is electrically discharged. Alternatively, by visually detecting, it is possible to easily detect a defective portion where the waterproof coating 30 does not exist, such as a pinhole of the waterproof coating. 5 (a) to 5 (c)
8, the base cloth 11 of the overlapping portion 16 of the waterproof sheet 10 is
The electrodes disposed on the surface of the waterproof coating film on the waterproof sheets 10 and 27 and the base cloth 1 of the waterproof sheets 10 and 27
An electric current is applied between the conductor layers of the base fabric 11 of the waterproof sheets 10 and 27 by an applied voltage (for example, a high voltage of about 20,000 V) between the base material 11 and the base material of the plurality of waterproof sheets 10 and 27. The eleventh conductor layer functions as one continuous conductor layer with respect to the electrodes, and the waterproof sheets 10, 27
Irrespective of the boundary of the above, a defective portion such as a pinhole (here, a portion where no waterproof coating film exists) can be efficiently detected.

【００４１】本発明に係る防水施工方法によれば、基布
１１に導電体層を備えてなる防水シートを下地１３に複
数枚敷き並べ、下地１３側の防水シートの縁部を覆うよ
うにして別の防水シート１０のテーパ状の重ね部１６を
重ね合わせる接合構造（接合部）によって、接合した防
水シートの基布の導電体層同士を互いに近接させて積層
できることから、防水シート上に形成した防水塗膜３０
表面に配置した電極３１と前記防水シートの導電体層と
の間の印加電圧によって前記接合構造によって接合され
た全ての防水シートの導電体層を通電させることがで
き、各防水シートの導電体層を電極３１に対して一枚の
連続した導電体層の如く機能する。この結果、防水塗膜
表面に沿って電極３１を移動するだけで、この導電体層
と前記電極３１との間の放電の検出によりピンホール等
の不具合箇所を、防水シート間の境界に関係無く広範囲
にわたって短時間で効率良く検出できる。本発明の防水
施工方法に係る防水シート同士の接合構造は、下地側の
防水シートの縁部に、別の防水シートのテーパ状の重ね
部１６を重ね合わせることで、導電体層同士を近接積層
させるものであれば良く、各種構成が採用可能であり、
前記図６記載のものに限定されない。According to the waterproofing method of the present invention, a plurality of waterproof sheets each having a conductive layer provided on the base cloth 11 are laid on the base 13 so as to cover the edge of the waterproof sheet on the base 13 side. Since the conductive layers of the base fabric of the joined waterproof sheet can be laminated close to each other by the joining structure (joining section) in which the tapered overlapping section 16 of another waterproof sheet 10 is overlapped, the waterproof sheet is formed on the waterproof sheet. Waterproof coating 30
By applying a voltage between the electrode 31 disposed on the surface and the conductor layer of the waterproof sheet, the conductor layers of all the waterproof sheets joined by the joining structure can be energized. Functions as a single continuous conductor layer for the electrode 31. As a result, by simply moving the electrode 31 along the surface of the waterproof coating film, detection of a discharge between the conductive layer and the electrode 31 causes a defective portion such as a pinhole to be detected regardless of the boundary between the waterproof sheets. Detection can be performed efficiently over a wide range in a short time. The joint structure between the waterproof sheets according to the waterproofing construction method of the present invention is such that the conductor layers are closely laminated by overlapping a tapered overlapping portion 16 of another waterproof sheet on the edge of the waterproof sheet on the base side. Any configuration can be used, and various configurations can be adopted.
It is not limited to the one shown in FIG.

【００４２】なお、本発明の防水シートおよび防水シー
トの接合構造は、前記実施の形態に記載の構成に限定さ
れず、各種変更が可能であることは言うまでも無い。例
えば、エラストマー層を形成する素材としては、アスフ
ァルトやゴムアスファルトに限定されず、塩化ビニル、
ゴム、ポリエチレン等も採用可能である。防水シートの
接合構造としては、例えば、図３に示した接合部２１に
おいても、防水シートの通気溝間が通気可能に連通する
構成も採用可能である。例えば、図１において、下地１
３側の防水シート１０に、重ね部１６先端（防水シート
端面１７近傍）まで到達される連通溝を形成し、この連
通溝を介して、両防水シート１０の通気溝１５同士を通
気可能に連通させる構成等が採用可能である。この場
合、重ね部１６先端では、エラストマー層１２が薄くな
っているため、例えば、この重ね部１６先端近傍に到達
させた連通溝を開口させる穴や切り込みを当該重ね部１
６先端に形成しても良い。本発明に係る防水施工方法に
適用される防水シートとしては、ほぼ全面にわたって満
遍なく導電体層を有するものであれば良く、各種構成が
採用可能である。例えば、基布自体が導電体層として機
能するもの、エラストマー層と基布との間に導電体層を
備えるもの、エラストマー層内に導電体層を有するも
の、エラストマー層自体が導電体層として機能するもの
（基布を備えないものを含む）等、各種構成が採用可能
である。The structure of the waterproof sheet and the waterproof sheet according to the present invention is not limited to the configuration described in the above embodiment, and it goes without saying that various modifications are possible. For example, the material forming the elastomer layer is not limited to asphalt and rubber asphalt, but may be vinyl chloride,
Rubber, polyethylene and the like can also be adopted. As the joining structure of the waterproof sheet, for example, in the joining section 21 shown in FIG. 3, a configuration in which the ventilation grooves of the waterproof sheet communicate with each other in a permeable manner can also be adopted. For example, in FIG.
A communication groove is formed in the waterproof sheet 10 on the third side to reach the tip of the overlapping portion 16 (near the end face 17 of the waterproof sheet), and through this communication groove, the ventilation grooves 15 of both waterproof sheets 10 communicate with each other so as to allow ventilation. It is possible to adopt a configuration or the like for causing the above. In this case, since the elastomer layer 12 is thin at the tip of the overlapping portion 16, for example, a hole or notch for opening a communication groove reaching near the tip of the overlapping portion 16 is formed.
6 It may be formed at the tip. As the waterproof sheet applied to the waterproof construction method according to the present invention, it is sufficient that the waterproof sheet has a conductive layer over substantially the entire surface, and various configurations can be adopted. For example, those in which the base fabric itself functions as a conductor layer, those in which a conductor layer is provided between the elastomer layer and the base fabric, those in which the conductor layer is provided in the elastomer layer, and those in which the elastomer layer itself functions as the conductor layer Various configurations, such as those that do not include a base fabric, may be employed.

【００４３】[0043]

【発明の効果】以上説明したように、本発明の防水シー
トによれば、シート面方向中央部側から外側へ行くに従
って次第に厚さ寸法が縮小するテーパ状の重ね部を縁部
に備え、この重ね部を別の防水シートの縁部等に重ね合
わせて接合するようになっているので、相手側に重ね部
を重ね合わせて接合した接合部と、この接合部の周囲と
の間では、前記重ね部のテーパ形状により、下地上のシ
ート被着厚が緩やかに変化することとなり、段差を生じ
ない。このため、優れた美観が得られるとともに、仕上
がり面上を歩行する歩行者等の邪魔にもなり難く、さら
に、液状防水材の塗装によって平坦な仕上がり面が容易
に得られ、塗装自体も容易になるといった優れた効果を
奏する。As described above, according to the waterproof sheet of the present invention, the edge portion is provided with a tapered overlap portion whose thickness gradually decreases from the center toward the outside in the sheet surface direction. Since the overlapped portion is overlapped and joined to the edge of another waterproof sheet or the like, between the joined portion where the overlapped portion is overlapped and joined to the other side and the periphery of this joint, Due to the tapered shape of the overlapping portion, the thickness of the sheet adhered on the base is gradually changed, and no step is generated. For this reason, excellent aesthetics can be obtained, and it is hard to disturb pedestrians walking on the finished surface, and a flat finished surface can be easily obtained by coating with a liquid waterproof material, and the coating itself can be easily performed. It has an excellent effect of becoming.

【００４４】請求項２記載のように、前記下地に向けら
れるシート下面には通気溝が形成され、この通気溝と連
通する連通溝が前記重ね部の前記下地に向けられる下面
に形成されていると、下地等から発生したガスを、通気
溝および連通溝を介して、防水シートと下地との間から
排気することができ、下地を覆うように施工された防水
シートの膨れ等を防止できる。重ね部に連通溝を形成し
たことで、通気溝からの排気を受け入れ可能な別の防水
シートや脱気装置等に対しては、この重ね部を重ねるこ
とで、前記連通溝を介して前記通気溝を連通させること
ができ、効率の良い排気を実現できるといった優れた効
果を奏する。According to a second aspect of the present invention, a ventilation groove is formed on the lower surface of the sheet facing the base, and a communication groove communicating with the ventilation groove is formed on the lower surface of the overlapping portion facing the base. Then, the gas generated from the base or the like can be exhausted from between the waterproof sheet and the base through the ventilation groove and the communication groove, and the swelling of the waterproof sheet constructed so as to cover the base can be prevented. By forming the communication groove in the overlapped portion, for another waterproof sheet or a deaerator capable of receiving exhaust gas from the ventilation groove, the ventilation portion is formed through the communication groove by overlapping this overlapped portion. The grooves can be communicated with each other, and an excellent effect such as efficient exhaust can be achieved.

【００４５】請求項３記載のように、前記シート下面側
に、アスファルト、ゴムアスファルト、塩化ビニル、ゴ
ム、ポリエチレン等のエラストマーからなるエラストマ
ー層を備え、前記重ね部は前記エラストマー層をテーパ
状に成形したものであり、前記通気溝及び前記連通溝は
前記エラストマー層に形成された溝であると、エラスト
マー層によって優れた防水性能が得られるとともに、通
気溝や連通溝はエラストマー層を成形することで容易に
得ることができ、低コスト化が可能となるといった優れ
た効果を奏する。According to a third aspect of the present invention, an elastomer layer made of an elastomer such as asphalt, rubber asphalt, vinyl chloride, rubber, or polyethylene is provided on the lower surface side of the sheet, and the overlapping portion is formed by tapering the elastomer layer. When the ventilation groove and the communication groove are grooves formed in the elastomer layer, excellent waterproof performance is obtained by the elastomer layer, and the ventilation groove and the communication groove are formed by molding the elastomer layer. Excellent effects such as easy acquisition and cost reduction are achieved.

【００４６】請求項４記載のように、前記シート下面と
対向するシート表面に、別の防水シートの前記重ね部の
重ね位置の目安となる表示が設けられていると、別の防
水シート等を重ね合わせる際に、段差を生じない適切な
重ね位置を容易に把握することができ、シート同士の接
合等の作業能率を向上することができるといった優れた
効果を奏する。According to a fourth aspect of the present invention, when an indication is provided on the sheet surface facing the lower surface of the sheet as an indication of the overlapping position of the overlapping portion of another waterproof sheet, another waterproof sheet or the like is provided. When superimposing, it is possible to easily grasp an appropriate superimposed position where a step is not generated, and it is possible to obtain an excellent effect that it is possible to improve work efficiency such as joining sheets.

【００４７】請求項５記載の防水シートの接合構造によ
れば、請求項１から４のいずれかに記載の防水シートの
重ね部同士を重ねることで、これら重ね部同士が重ね合
わされてなる接合部を、この接合部以外の防水シートと
面一あるいは略面一することができ、仕上げ作業性を向
上できるとともに、しかも優れた美観が得られる。防水
シートの重ね幅がある程度変化しても、テーパ状の重ね
部同士の重ね合わせによって防水シート間には隙間が生
じないから、防水性を確保できる範囲内で防水シート間
の重ね幅を可変とすることができ、これにより、下地側
の防水シートの重ね部に対する別の防水シートの寸法誤
差や、実際の施工における位置ずれ等を吸収できるか
ら、防水シートの施工能率を向上できるといった優れた
効果を奏する。According to the joint structure of the waterproof sheet according to the fifth aspect, the overlapping portions of the waterproof sheet according to any one of the first to fourth aspects are overlapped with each other to form a joint portion in which the overlapping portions are overlapped. Can be flush or substantially flush with the waterproof sheet other than the joint portion, so that the finishing workability can be improved and an excellent aesthetic appearance can be obtained. Even if the overlapping width of the waterproof sheet changes to some extent, there is no gap between the waterproof sheets due to the overlapping of the tapered overlapping portions, so the overlapping width between the waterproof sheets can be changed within the range that can ensure waterproofness. This makes it possible to absorb the dimensional error of another waterproof sheet with respect to the overlapping portion of the waterproof sheet on the ground side and the displacement of the actual waterproof sheet, and the like, thereby improving the waterproof sheet installation efficiency. To play.

【００４８】請求項６記載の接合構造によれば、下地側
の重ね部のアンカーピン打ち込み位置が、この重ね部を
覆うようにして重ねられる別の防水シートの重ね部によ
って隠蔽されるから、アンカーピン打ち込み位置の防水
性の確保、衝撃力や引き抜き力等によるアンカーピンの
抜けや傾きや変形等の防止等を実現できるといった優れ
た効果を奏する。According to the joint structure of the sixth aspect, the anchor pin driving position of the overlapping portion on the base side is concealed by the overlapping portion of another waterproof sheet which is overlapped so as to cover this overlapping portion. An excellent effect is achieved such that the waterproofness of the pin driving position can be ensured, and the anchor pin can be prevented from coming off, tilting, deforming, and the like due to impact force, pull-out force, and the like.

【００４９】請求項７記載の防水シートの接合構造によ
れば、請求項２または３記載の防水シートの重ね部が、
下地側の防水シートの縁部を外側から覆うように重ねら
れ、前記下地側防水シートの前記下地に向けられた下面
に延在形成された前記通気溝と、前記重ね部下面の連通
溝と通気可能に連通されることで、異なる防水シート間
に、下地から発生した水蒸気等のガスを下地と防水シー
トとの間から排気する流路が形成されるから、前記ガス
を排気位置まで導いて排気することが容易となる。ま
た、排気位置の設定が自由になったり、排気位置に設置
される脱気装置の設置数を削減できるといった効果も得
られる。According to the joint structure of the waterproof sheet according to the seventh aspect, the overlapping portion of the waterproof sheet according to the second or third aspect is
The ventilation groove, which is stacked so as to cover the edge of the base-side waterproof sheet from the outside, and is formed to extend on the lower surface of the base-side waterproof sheet facing the base; By being communicated as possible, a flow path for exhausting gas such as water vapor generated from the base from between the base and the waterproof sheet is formed between different waterproof sheets, so that the gas is guided to the exhaust position and exhausted. It becomes easy to do. Further, it is possible to obtain the effect that the setting of the exhaust position can be freely set and the number of deaerators installed at the exhaust position can be reduced.

【００５０】請求項８記載の防水施工方法によれば、防
水シート上に形成された防水塗膜上に配置した電極と防
水シートの導電体層との間の印加電圧による放電箇所の
有無を調べることで、防水塗膜のピンホール等、漏水の
原因になるような不具合の存在の有無を確認できる。こ
の防水施工方法によれば、前述したような防水塗膜の不
具合部分を防水塗膜を傷付けること無く（非破壊）検出
することができる。下地上の防水シートの縁部に別の防
水シートの重ね部を重ねて防水シート同士を接合し、各
防水シートの導電体層を積層状態にすると、重ね部のテ
ーパ形状によって各防水シートの導電体層同士が接近し
て積層され、防水シートの導電体層と電極との間の印加
電圧により、接合された防水シートの導電体層間に漏れ
電流を生じさせることで導電体層同士を通電させること
ができ、接合された複数毎の防水シートの導電体層を、
電極に対して一枚の導電体層の如く機能させることがで
きるから、検出用の電極を、防水シートの導電体層との
間に電極を印加したまま防水塗膜表面に沿って移動させ
て放電箇所を検出することで、ピンホール等の不具合箇
所を連続的に検出できるといった優れた効果を奏する。According to the waterproof construction method of the eighth aspect, the presence or absence of a discharge location due to the applied voltage between the electrode disposed on the waterproof coating film formed on the waterproof sheet and the conductor layer of the waterproof sheet is examined. This makes it possible to confirm the presence or absence of a defect that causes water leakage, such as a pinhole of the waterproof coating film. According to this waterproofing construction method, the defective portion of the waterproof coating film as described above can be detected (non-destructively) without damaging the waterproof coating film. When the overlap portion of another waterproof sheet is overlapped on the edge of the waterproof sheet on the base and the waterproof sheets are joined to each other, and the conductor layers of each waterproof sheet are laminated, the conductive shape of each waterproof sheet is formed by the tapered shape of the overlap portion. The body layers are stacked close to each other, and a current is applied between the conductor layers of the joined waterproof sheet by applying a voltage between the conductor layers and the electrodes of the waterproof sheet to cause a leakage current between the conductor layers of the joined waterproof sheet. The conductor layers of the plurality of waterproof sheets joined together can be
Since the electrode can function as a single conductor layer, the detection electrode is moved along the surface of the waterproof coating while the electrode is applied between the electrode and the conductor layer of the waterproof sheet. By detecting the discharge location, there is an excellent effect that a failure location such as a pinhole can be continuously detected.

【図面の簡単な説明】[Brief description of the drawings]

【図１】 本発明の防水シートの１実施の形態を示す斜
視図である。FIG. 1 is a perspective view showing one embodiment of a waterproof sheet of the present invention.

【図２】 図１の防水シートの重ね部を下面側から見た
拡大斜視図である。FIG. 2 is an enlarged perspective view of the overlapping portion of the waterproof sheet of FIG. 1 as viewed from a lower surface side.

【図３】 本発明の防水シートの接合構造の第１実施例
を示す図であって、（ａ）は同じ形状の重ね部同士を略
一致させて重ね合わせた状態を示す平面図、（ｂ）は正
断面図、（ｃ）は重ね部の先端部同士のみを重ね合わせ
た状態を示す正断面図である。3A and 3B are diagrams showing a first embodiment of the waterproof sheet joining structure of the present invention, wherein FIG. 3A is a plan view showing a state in which overlapping portions having the same shape are almost aligned and overlapped, and FIG. () Is a front cross-sectional view, and (c) is a front cross-sectional view showing a state in which only the leading end portions of the overlapping portions are overlapped.

【図４】 図３の接合構造の別態様であって、下地側の
防水シートの重ね部をアンカーを用いて下地に固定した
接合構造を示す断面図である。FIG. 4 is a cross-sectional view showing another embodiment of the joining structure of FIG. 3, in which the overlapping portion of the waterproof sheet on the foundation side is fixed to the foundation using an anchor.

【図５】 本発明の防水シートの接合構造の第２実施例
を示す図であって、（ａ）は平面図、（ｂ）は正断面
図、（ｃ）は下面図である。5A and 5B are views showing a second embodiment of the waterproof sheet joining structure of the present invention, wherein FIG. 5A is a plan view, FIG. 5B is a front sectional view, and FIG. 5C is a bottom view.

【図６】 図３（ａ）〜（ｃ）に示した接合構造により
接合した防水シート上に液状防水材の吹き付け塗布等に
より形成した防水塗膜並びにそのピンホール試験を行う
試験装置等を示す図であって、特に接合部近傍を示す断
面図である。FIG. 6 shows a waterproof coating film formed by spraying a liquid waterproof material on a waterproof sheet joined by the joining structure shown in FIGS. 3A to 3C and a test apparatus for performing a pinhole test thereof. It is a figure and especially sectional drawing which shows the vicinity of a joining part.

【図７】 防水シートを示す断面図である。FIG. 7 is a sectional view showing a waterproof sheet.

【図８】 従来例の防水シート並びに防水シートの接合
構造を示す斜視図である。FIG. 8 is a perspective view showing a conventional waterproof sheet and a joint structure of the waterproof sheet.

【図９】 従来例の防水シート並びに防水シートの接合
構造を示す正断面図である。FIG. 9 is a front sectional view showing a conventional waterproof sheet and a joint structure of the waterproof sheet.

【符号の説明】[Explanation of symbols]

１０，１０ａ，１０ｂ…防水シート、１１ｂ…導電体
層、１２…防水シート、１３…下地、１５…通気溝、１
６…重ね部、１９…連通溝、２３ａ，２３ｂ，２３ｄ…
表示、２７…防水シート、２７ｂ…縁部、２９…アンカ
ーピン、３０…防水塗膜、３１…電極。10, 10a, 10b: waterproof sheet, 11b: conductive layer, 12: waterproof sheet, 13: base, 15: ventilation groove, 1
6 ... overlapping part, 19 ... communication groove, 23a, 23b, 23d ...
Indication, 27: waterproof sheet, 27b: edge, 29: anchor pin, 30: waterproof coating film, 31: electrode.

Claims (8)

【特許請求の範囲】[Claims] 【請求項１】 コンクリート等からなる下地を覆う防水
シートであって、シート面方向中央部側から外側へ行く
に従って次第に厚さ寸法が縮小するテーパ状の重ね部を
縁部に備えることを特徴とする防水シート。1. A waterproof sheet for covering a base made of concrete or the like, characterized in that a tapered overlap portion whose thickness dimension is gradually reduced from a central portion in the sheet surface direction to the outside is provided at an edge portion. Waterproof sheet. 【請求項２】 前記下地に向けられるシート下面には通
気溝が形成され、この通気溝と連通する連通溝が前記重
ね部の前記下地に向けられる下面に形成されていること
を特徴とする請求項１記載の防水シート。2. A seat according to claim 2, wherein a ventilation groove is formed in a lower surface of the sheet facing the base, and a communication groove communicating with the ventilation groove is formed in a lower surface of the overlapping portion facing the base. Item 7. The waterproof sheet according to Item 1. 【請求項３】 前記シート下面側に、アスファルト、ゴ
ムアスファルト、塩化ビニル、ゴム、ポリエチレン等の
エラストマーからなるエラストマー層を備え、前記重ね
部は前記エラストマー層をテーパ状に成形したものであ
り、前記通気溝及び前記連通溝は前記エラストマー層に
形成された溝であることを特徴とする請求項２記載の防
水シート。3. An underside of the sheet is provided with an elastomer layer made of an elastomer such as asphalt, rubber asphalt, vinyl chloride, rubber, or polyethylene, and the overlapping portion is formed by molding the elastomer layer into a tapered shape. The waterproof sheet according to claim 2, wherein the ventilation groove and the communication groove are grooves formed in the elastomer layer. 【請求項４】 前記シート下面と対向するシート表面
に、別の防水シートの前記重ね部の重ね位置の目安とな
る表示が設けられていることを特徴とする請求項１から
３のいずれかに記載の防水シート。4. The display device according to claim 1, wherein an indication is provided on a sheet surface facing the lower surface of the sheet so as to indicate an overlapping position of the overlapping portion of another waterproof sheet. The described waterproof sheet. 【請求項５】 コンクリート等からなる下地を覆う複数
の防水シート間を接合する防水シートの接合構造であっ
て、請求項１から４のいずれかに記載の防水シートの重
ね部同士が重ねられていることを特徴とする防水シート
の接合構造。5. A joint structure of a waterproof sheet for joining a plurality of waterproof sheets covering a base made of concrete or the like, wherein the overlapping portions of the waterproof sheets according to claim 1 are overlapped with each other. A waterproof sheet joining structure. 【請求項６】 下地側に配置された防水シートの重ね部
が該重ね部を貫通して下地に打ち込まれたアンカーピン
によって下地に固定され、前記下地側の重ね部の前記ア
ンカーピン打ち込み位置を含む部分が、別の防水シート
の重ね部の重ね合わせによって隠蔽されていることを特
徴とする請求項５記載の防水シートの接合構造。6. An overlapping portion of the waterproof sheet disposed on the base side is fixed to the base by an anchor pin penetrating through the overlapping portion and driven into the base, and the anchor pin driving position of the base side overlapping portion is determined. 6. The joint structure for a waterproof sheet according to claim 5, wherein the portion including the second waterproof sheet is concealed by overlapping another overlapping section of the waterproof sheet. 【請求項７】 コンクリート等からなる下地を覆う複数
の防水シート間を接合する防水シートの接合構造であっ
て、請求項２または３記載の防水シートの重ね部が、下
地側の防水シートの縁部を外側から覆うように重ねら
れ、前記下地側防水シートの前記下地に向けられた下面
に形成された通気溝と、前記重ね部下面の連通溝とが通
気可能に連通されていることを特徴とする防水シートの
接合構造。7. A waterproof sheet joining structure for joining a plurality of waterproof sheets covering a base made of concrete or the like, wherein the overlapping portion of the waterproof sheet according to claim 2 or 3 is an edge of the waterproof sheet on the base side. The ventilation groove formed on the lower surface of the substrate-side waterproof sheet facing the substrate and the communication groove on the lower surface of the overlap portion are overlapped so as to cover the portion from the outside, and the communication groove on the lower surface of the overlap portion is communicable. Waterproof sheet joining structure. 【請求項８】 請求項１から３のいずれかに記載の防水
シートの重ね部を下地側の防水シートの縁部に外側から
覆うようにして重ねることで、各防水シートに設けられ
ている導電体層を積層状態として両防水シートを接合
し、これら接合された防水シート上に液状防水材を塗装
してなる防水塗膜を形成した後、前記防水塗膜表面に配
置した電極と前記防水シートの導電体層との間に作用さ
せた電圧による放電発生個所を検出することを特徴とす
る防水施工方法。8. The conductive sheet provided on each waterproof sheet by overlapping the overlapping section of the waterproof sheet according to any one of claims 1 to 3 so as to cover the edge of the waterproof sheet on the base side from the outside. The two waterproof sheets are joined with the body layers in a laminated state, a waterproof coating is formed by coating a liquid waterproof material on these joined waterproof sheets, and then the electrodes and the waterproof sheet disposed on the surface of the waterproof coating are formed. A method for waterproofing, characterized by detecting a location where a discharge is caused by a voltage applied between the conductive layer and the conductive layer.
JP2000114060A 2000-04-14 2000-04-14 Waterproof sheet, joint structure of waterproof sheet and waterproofing construction method Expired - Fee Related JP3409016B2 (en)

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Publication Number Publication Date
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* Cited by examiner, † Cited by third party
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JP2003154328A (en) * 2001-11-26 2003-05-27 Toyo Tire & Rubber Co Ltd Construction method for applying impervious sheet to wall surface
US7722938B2 (en) 2003-02-14 2010-05-25 The Procter & Gamble Company Dry paint transfer laminate
US7727607B2 (en) 2003-06-09 2010-06-01 The Procter & Gamble Company Multi-layer dry paint decorative laminate having discoloration prevention barrier
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US7897228B2 (en) 2001-12-20 2011-03-01 The Procter & Gamble Company Articles and methods for applying color on surfaces
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JP2016011570A (en) * 2014-06-30 2016-01-21 住ベシート防水株式会社 Waterproof resin sheet and joining method
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JP2003154328A (en) * 2001-11-26 2003-05-27 Toyo Tire & Rubber Co Ltd Construction method for applying impervious sheet to wall surface
US7897228B2 (en) 2001-12-20 2011-03-01 The Procter & Gamble Company Articles and methods for applying color on surfaces
US7722938B2 (en) 2003-02-14 2010-05-25 The Procter & Gamble Company Dry paint transfer laminate
US7807246B2 (en) 2003-02-14 2010-10-05 The Procter & Gamble Company Dry paint transfer laminate
US7842363B2 (en) 2003-02-14 2010-11-30 The Procter & Gamble Company Differential release system for a self-wound multilayer dry paint decorative laminate having a pressure sensitive adhesive
US7842364B2 (en) 2003-02-14 2010-11-30 The Procter & Gamble Company Differential release system for a self-wound multilayer dry paint decorative laminate having a pressure sensitive adhesive
US7905981B2 (en) 2003-02-14 2011-03-15 The Procter & Gamble Company Method of making a dry paint transfer laminate
US7727607B2 (en) 2003-06-09 2010-06-01 The Procter & Gamble Company Multi-layer dry paint decorative laminate having discoloration prevention barrier
KR101115139B1 (en) * 2009-08-18 2012-02-14 채민호 Expansion joint waterproofing method using force dispersion principle
JP2016011518A (en) * 2014-06-27 2016-01-21 滑川機械有限会社 Glass mat tip part thickness reduction device
JP2016011570A (en) * 2014-06-30 2016-01-21 住ベシート防水株式会社 Waterproof resin sheet and joining method

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