JP2019163662A - Repair method of concrete water tank - Google Patents

Repair method of concrete water tank Download PDF

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JP2019163662A
JP2019163662A JP2018052982A JP2018052982A JP2019163662A JP 2019163662 A JP2019163662 A JP 2019163662A JP 2018052982 A JP2018052982 A JP 2018052982A JP 2018052982 A JP2018052982 A JP 2018052982A JP 2019163662 A JP2019163662 A JP 2019163662A
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fixing member
covering material
concrete
sheet
drainage
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隆之 堤
Takayuki Tsutsumi
隆之 堤
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SOKEN SAISOU CORP
Kumonos Corp
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SOKEN SAISOU CORP
Kumonos Corp
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Abstract

To provide a repair method of a concrete water tank that can be repaired in a short period of time and has high waterproof reliability.SOLUTION: The repair method comprises the steps of: covering a surface portion of existing concrete (2, 3) with a sheet (7); arranging a first fixing member (8) on the sheet (7); fixing the first fixing member (8) to the existing concrete (2, 3); covering the sheet (7) and the first fixing member (8) with a first covering material (10); arranging a second fixing member (12) on the first covering material (10); fixing the second fixing member (12) to the existing concrete (2, 3); and covering a second fixing member (11) with a second covering material (12).SELECTED DRAWING: Figure 7

Description

本発明は、コンクリート製貯水槽を補修する方法に関する。 The present invention relates to a method for repairing a concrete water tank.

化学物質等を扱う工場設備には、排水を一時的に貯留する排水ピット等の各種のコンクリート製貯水槽が設けられている。この貯水槽には様々な化学物質を含む排水が流れ込む。それらの化学物質の中には、コンクリートを腐蝕させる酸が含まれることも多い。そのため、これらコンクリート製貯水槽では、耐酸性樹脂等の被覆材をコンクリート表面に塗布して、排水が直接コンクリートと接触しないようにする必要がある。また、被覆材は時間の経過とともに劣化してその耐酸性が低下することから、定期的に剥がして新たな被覆材を塗布する必要がある。そのために、種々の防水方法（例えば、塗膜防水方法、シート防水方法）が提案されている。 Factory facilities that handle chemical substances and the like are provided with various concrete water tanks such as drainage pits for temporarily storing wastewater. Wastewater containing various chemical substances flows into this water tank. Often these chemicals contain acids that corrode concrete. Therefore, in these concrete water storage tanks, it is necessary to apply a covering material such as acid-resistant resin to the concrete surface so that the waste water does not directly contact the concrete. Further, since the covering material deteriorates with the passage of time and its acid resistance decreases, it is necessary to periodically peel off and apply a new covering material. Therefore, various waterproofing methods (for example, a coating film waterproofing method and a sheet waterproofing method) have been proposed.

しかし、従来の防水方法はそれぞれ一長一短があり、コンクリート製貯水槽に必要な要件を満足できるものでなかった。例えば、塗膜防水（ウレタン防水、ＦＲＰ防水）方法は、樹脂又は樹脂と繊維の混合物をコンクリート表面に直接塗布する方法であるが、いずれの方法にあっても、コンクリート内の水分が蒸発して塗膜とコンクリートとの間に蓄積して塗膜がコンクリートから剥がれる、また、湿ったコンクリート表面に塗布した樹脂は容易に剥離するため、樹脂を塗布する前にコンクリート表面を数日放置して十分に乾燥させる必要がある、という問題がある。   However, each conventional waterproofing method has advantages and disadvantages, and it cannot satisfy the requirements for a concrete water tank. For example, the coating waterproofing (urethane waterproofing, FRP waterproofing) method is a method in which a resin or a mixture of resin and fiber is directly applied to the concrete surface. However, in any method, moisture in the concrete evaporates. Accumulated between the paint film and the concrete, the paint film peels off from the concrete, and the resin applied to the wet concrete surface easily peels off, so it is sufficient to leave the concrete surface for several days before applying the resin. There is a problem that it needs to be dried.

特開２０１７−２０６６８０号公報JP 2017-206680 A

そこで、本発明は、短期間で補修でき、しかも高い防水信頼性を有する、新たなコンクリート製貯水槽の補修方法を提供するものである。   Therefore, the present invention provides a new method for repairing a concrete water tank that can be repaired in a short period of time and has high waterproof reliability.

具体的に、本発明の一実施形態に係る、コンクリート製貯水槽の補修方法は、
既設コンクリート（２、３）の表面部分をシート（７）で被覆する工程１と、
工程１に続き、前記シート（７）の上に第１の固定部材（８）を配置する工程２と、
工程２に続き、前記第１の固定部材（８）を前記既設コンクリート（２，３）に固定する工程３と、
工程３に続き、前記シート（７）及び前記第１の固定部材（８）を第１の被覆材（１０）で被覆する工程４と、
工程４に続き、前記第１の被覆材（１０）の上に第２の固定部材（１２）を配置する工程５と、
工程５に続き、前記第２の固定部材（１２）を前記既設コンクリート（２，３）に固定する工程６と、
工程６に続き、前記第２の固定部材（１１）を第２の被覆材（１２）で被覆する工程７を含む。 Specifically, according to one embodiment of the present invention, a method for repairing a concrete water tank,
Step 1 of covering the surface portion of the existing concrete (2, 3) with the sheet (7);
Following the step 1, the step 2 of disposing the first fixing member (8) on the sheet (7);
Following the step 2, the step 3 of fixing the first fixing member (8) to the existing concrete (2, 3);
Following the step 3, the step 4 of covering the sheet (7) and the first fixing member (8) with the first covering material (10),
Following the step 4, the step 5 of disposing a second fixing member (12) on the first covering material (10);
Following the step 5, the step 6 of fixing the second fixing member (12) to the existing concrete (2, 3);
Subsequent to step 6, the method includes a step 7 of covering the second fixing member (11) with a second covering material (12).

この補修方法によれば、被覆材は、コンクリートではなく、固定部材によって支持される。また、被覆材はコンクリート表面を覆っていない。そのため、コンクリートの中から染み出た水分は、コンクリートの表面部分とシートとの界面を通って排出される。したがって、既存の被覆材（塗膜）をコンクリート表面から取り除いた後、コンクリートを乾燥することなくすぐにシートでコンクリートの表面部分を被覆することが可能となる。これにより、補修の工期が著しく短縮される。   According to this repair method, the covering material is supported not by the concrete but by the fixing member. The covering material does not cover the concrete surface. For this reason, moisture exuded from the concrete is discharged through the interface between the surface portion of the concrete and the sheet. Therefore, after removing the existing coating material (coating film) from the concrete surface, the surface portion of the concrete can be immediately covered with a sheet without drying the concrete. This significantly shortens the repair period.

コンクリート製貯水槽の部分斜視図である。It is a fragmentary perspective view of a concrete water tank. 排水路（排水グリッド）が形成された、図１の貯水槽の部分斜視図である。It is a fragmentary perspective view of the water storage tank of FIG. 1 in which the drainage channel (drainage grid) was formed. シートと第１の固定部材が配置された、図１の貯水槽の部分斜視図である。It is a fragmentary perspective view of the water storage tank of Drawing 1 by which a sheet and the 1st fixing member are arranged. 第１の被覆材で被覆された、図１の貯水槽の部分斜視図である。FIG. 2 is a partial perspective view of the water storage tank of FIG. 1 covered with a first covering material. 第２の固定部材が配置された、図１の貯水槽の部分斜視図である。It is a fragmentary perspective view of the water storage tank of Drawing 1 with which the 2nd fixing member is arranged. 第２の被覆材で被覆された、図１の貯水槽の部分斜視図である。It is a fragmentary perspective view of the water storage tank of Drawing 1 covered with the 2nd covering material. 補修後の貯水槽の部分断面図である。It is a fragmentary sectional view of the water tank after repair. 第１の被覆材で被覆された貯水槽側壁の断面図（図８（a））と第２の被覆材で被覆された貯水槽側壁の断面図（図８（ｂ））である。It is sectional drawing (FIG. 8 (a)) of the water tank side wall coat | covered with the 1st coating | covering material, and sectional drawing (FIG.8 (b)) of the water tank side wall coat | covered with the 2nd coating | covering material.

１．貯水槽の概略構造：
図１は、コンクリート製貯水槽１の一部を示す斜視図である。図示するように、貯水槽１は、少なくとも底壁２と周囲の側壁３を有する。図面上、底壁２は平坦な壁として表れているが、任意の箇所に一段と低くなったピット又は一段と高くなった段部があってもよい。側壁３は、底壁２の縁から垂直に立ち上がる平坦な壁として表されているが、曲面の壁であってもよいし、傾斜した壁であってもよい。 1. Schematic structure of the water tank:
FIG. 1 is a perspective view showing a part of a concrete water tank 1. As shown in the figure, the water tank 1 has at least a bottom wall 2 and a peripheral side wall 3. In the drawing, the bottom wall 2 appears as a flat wall, but there may be a pit that becomes lower or a step that becomes higher at any point. The side wall 3 is represented as a flat wall that rises vertically from the edge of the bottom wall 2, but may be a curved wall or an inclined wall.

図示する貯水槽１は、一定レベルまで排水を貯留することができる。排水の性質は、貯水槽１が使用される環境によって異なる。例えば、化学工場などの貯水槽には、雨水の他に、工場内で使用する一部の化学物質を含む排水も貯留されることがある。排水によっては、コンクリートにとって有害な酸を含むことがあり得る。貯水槽には高温の排水が流れ込むこともある。したがって、このような厳しい環境で使用される貯水槽１は、その表面（排水に接する面）を耐油性又は耐薬品性の樹脂で被覆するとともに、その被覆樹脂を数年ごとに補修（剥ぎ取って新たな樹脂に置き換える）する必要がある。しかし、貯水槽が置かれている環境によっては十分な補修期間が与えられず、一日も早く設備を再稼働できる状態に回復する必要がある。そこで、以下に説明する実施形態は、補修の開始から再使用可能な状態までの期間を出来るだけ短くできる新たな補修方法を提供するものである。   The illustrated water tank 1 can store wastewater to a certain level. The nature of the drainage varies depending on the environment in which the water tank 1 is used. For example, in a water tank such as a chemical factory, wastewater containing some chemical substances used in the factory may be stored in addition to rainwater. Depending on the drainage, it can contain acids that are harmful to the concrete. Hot water may flow into the reservoir. Therefore, the water tank 1 used in such a harsh environment coats the surface (the surface in contact with drainage) with an oil-resistant or chemical-resistant resin, and repairs (stripping off) the coating resin every several years. Replacement with new resin). However, depending on the environment in which the water tank is placed, a sufficient repair period is not given, and it is necessary to restore the equipment to a state where it can be restarted as soon as possible. Therefore, the embodiment described below provides a new repair method that can shorten the period from the start of repair to a reusable state as much as possible.

２．補修方法：
貯水槽の補修は以下の工程に従って行われる。 2. Repair method:
The water tank is repaired according to the following process.

［工程１：排水及び清掃］
貯水槽１に貯まっている貯留水を除去する。 [Step 1: Drainage and cleaning]
The stored water stored in the water tank 1 is removed.

［工程２：清掃］
排水後の貯水槽１内面（底壁２と側壁３）にコンクリートが露出している場合（コンクリートが何らかの被覆材で被覆されていない場合）、コンクリートの表面を例えば高圧洗浄してその付着物（例えば、汚れ、結晶物）を除去する。貯水槽１の内面が被覆材（前回の補修時に施された被覆材）で覆われている場合、この老朽化した被覆材を除去する。ただし、老朽化した被覆材を除去することは必ずしも必要なことではない。 [Step 2: Cleaning]
When concrete is exposed on the inner surface (bottom wall 2 and side wall 3) of the water storage tank 1 after drainage (when the concrete is not covered with any coating material), the surface of the concrete is washed with high pressure, for example, and its deposits ( For example, dirt and crystalline substances) are removed. When the inner surface of the water storage tank 1 is covered with a covering material (a covering material applied at the previous repair), the aged covering material is removed. However, it is not always necessary to remove the old covering material.

被覆材を除去した後のコンクリート表面又は洗浄後のコンクリート表面は乾燥してもよいし、乾燥しなくてもよい。   The concrete surface after removing the coating material or the concrete surface after washing may be dried or may not be dried.

［工程３：排水路の形成］
図２に示すように、貯水槽１の内面（底壁２と側壁３）に所定の間隔をあけて格子状に溝又は排水路４（４ａ、４ｂ）を形成する。後に説明するが、排水路４は、被覆材で覆われた補修後のコンクリートからその表面に染み出してくる水等の液体を、表面張力を利用して吸い上げ、その後、空気との接触によって蒸散させるための通路である。 [Step 3: Formation of drainage channel]
As shown in FIG. 2, grooves or drainage channels 4 (4 a, 4 b) are formed in a lattice shape at predetermined intervals on the inner surface (bottom wall 2 and side wall 3) of the water storage tank 1. As will be described later, the drainage channel 4 sucks up liquid such as water that oozes out from the repaired concrete covered with the covering material using the surface tension, and then transpirations by contact with air. It is a passage for making it.

図示するように、底壁２の排水路４ａの周端部と側壁３の排水路４ｂの下端部は、底壁２と側壁３の境界（周囲の下端角部）で互いに連通していることが好ましい。排水路４は、例えば、コンクリートカッターを使って排水路の側面に沿った切り溝を形成することによって得られる。   As shown in the figure, the peripheral end of the drainage channel 4a of the bottom wall 2 and the lower end of the drainage channel 4b of the side wall 3 communicate with each other at the boundary between the bottom wall 2 and the side wall 3 (lower peripheral corner). Is preferred. The drainage channel 4 is obtained, for example, by forming a kerf along the side surface of the drainage channel using a concrete cutter.

例えば、排水路４の深さと幅はそれぞれ約１ｃｍとする。隣接する排水路４の間隔は約３０ｃｍ〜約１００ｃｍとすることが好ましい。排水路の間隔は場所に応じて変えてもよい。例えば、底壁２における排水路４の間隔を、側壁３における水平方向の排水路の間隔よりも小さくしてもよい。   For example, the depth and width of the drainage channel 4 are each about 1 cm. It is preferable that the space | interval of the adjacent drainage channel 4 shall be about 30 cm-about 100 cm. You may change the space | interval of a drainage channel according to a place. For example, the interval between the drainage channels 4 on the bottom wall 2 may be smaller than the interval between the horizontal drainage channels on the side wall 3.

排水路４に加えて、貯水槽１の上端近傍には、水平方向に伸びるアンカー溝５を形成する。このアンカー溝５は、垂直方向に伸びる隣接する排水路４を横断するようにしてもよいし、横断しないように排水路４から分離してもよい。アンカー溝５の深さと幅は、後に説明するようにアンカー溝５に充填される材料（後に説明するポリウレア樹脂）とコンクリートとの水密性を考慮して適宜決定することができる。   In addition to the drainage channel 4, an anchor groove 5 extending in the horizontal direction is formed in the vicinity of the upper end of the water storage tank 1. The anchor groove 5 may cross the adjacent drainage channel 4 extending in the vertical direction, or may be separated from the drainage channel 4 so as not to cross. The depth and width of the anchor groove 5 can be appropriately determined in consideration of the water tightness between the material (polyurea resin described later) and the concrete filled in the anchor groove 5 as will be described later.

［工程４：排水材の設置］
排水路４に排水材料６（図７参照）を充填し、貯水槽１の内面に格子状の排水グリッドを形成する。排水材料は、隣接するコンクリート表面から水を集める機能と集めた水を排水路に沿って排水路の末端（すなわち、側壁に形成された排水路の上端部）まで送る機能を有することが好ましい。そのために、排水材料には、各種素材からなる不織布が好適に用いられる。これにより、貯水槽１の内面には格子状に配置された排水グリッドが形成される。 [Process 4: Installation of drainage material]
The drainage channel 4 is filled with drainage material 6 (see FIG. 7), and a grid-like drainage grid is formed on the inner surface of the water storage tank 1. The drainage material preferably has a function of collecting water from the adjacent concrete surface and a function of sending the collected water along the drainage channel to the end of the drainage channel (that is, the upper end portion of the drainage channel formed on the side wall). Therefore, the nonwoven fabric which consists of various raw materials is used suitably for drainage material. As a result, drainage grids arranged in a grid are formed on the inner surface of the water storage tank 1.

［工程５：シート被覆］
図３に示すように、排水材料６が充填された排水路４及びコンクリート表面、より具体的にはアンカー溝３よりも下の領域３ａ（図８(a）参照)にある排水路４及びコンクリート表面をシート７で覆う。シート７は例えば、ポリエチレン、ポリプロピレン、ポリエチレンテレフタレートなど各種のプラスチックフィルムの他、紙又は不織布が用いられる。シート７は不透水性であることが好ましいが、透水性のシートも使用できる。シート７の表面に供用温度が高温（例えば、摂氏９０度）の材料を塗布する場合、その供用温度に耐える材料を選択することが望ましい。 [Step 5: Sheet coating]
As shown in FIG. 3, the drainage channel 4 and concrete surface filled with the drainage material 6, more specifically, the drainage channel 4 and concrete in the region 3 a below the anchor groove 3 (see FIG. 8A). Cover the surface with a sheet 7. The sheet 7 is made of, for example, various plastic films such as polyethylene, polypropylene, and polyethylene terephthalate, and paper or non-woven fabric. The sheet 7 is preferably impermeable to water, but a permeable sheet can also be used. When a material having a high service temperature (for example, 90 degrees Celsius) is applied to the surface of the sheet 7, it is desirable to select a material that can withstand the service temperature.

一般に、シート７は、所定幅（例えば、約１ｍ）の帯状シートとして提供されている。したがって、シート幅よりも大きな幅を有する壁面は、シートと並列に配置するとともに、隣接するシートの縁を互いに重ね合わせて、全体が被覆される。   In general, the sheet 7 is provided as a belt-like sheet having a predetermined width (for example, about 1 m). Therefore, the wall surface having a width larger than the sheet width is disposed in parallel with the sheet, and the edges of the adjacent sheets are overlapped with each other to be entirely covered.

［工程６：第１の固定部材（フラットバー）の施工］
固定部材（第１の固定部材）８を使ってシート７を固定する。シートの重ね合わせ部分（接続部）は、第１の固定部材８で上から押さえてシート端部の浮きを防止することが好ましい。当然、シートの重ね合わせ部分以外の箇所にも第１の固定部材８を配置してもよい。 [Step 6: Construction of first fixing member (flat bar)]
The sheet 7 is fixed using a fixing member (first fixing member) 8. It is preferable that the overlapping portion (connecting portion) of the sheet is pressed from above by the first fixing member 8 to prevent the sheet end from floating. Of course, you may arrange | position the 1st fixing member 8 also in places other than the overlapping part of a sheet | seat.

第１の固定部材８には、幅が３０〜９０ｍｍの金属製フラットバー（帯状金属板）を使うことが好ましい。排水による腐蝕を防止するために、第１の固定部材８はステンレス鋼であることが好ましい。第１の固定部材８の間隔は例えば１００〜２００ｃｍとすることが好ましい。 The first fixing member 8 is preferably a metal flat bar (band metal plate) having a width of 30 to 90 mm. In order to prevent corrosion due to drainage, the first fixing member 8 is preferably stainless steel. The interval between the first fixing members 8 is preferably 100 to 200 cm, for example.

第１の固定部材８はコンクリートアンカー９（図７、図８(a)参照）で固定する。このコンクリートアンカー９は、フラットバーに形成した開口（孔）を通じてコンクリートの内面に穴を開け、そこに埋設部（アンカー部）を固定した後、この埋設部にねじを固定するものであってもよい。   The first fixing member 8 is fixed by a concrete anchor 9 (see FIGS. 7 and 8A). Even if this concrete anchor 9 makes a hole in the inner surface of concrete through an opening (hole) formed in a flat bar and fixes a buried portion (anchor portion) there, a screw is fixed to this buried portion. Good.

［工程７：第１の被覆］
図４に示すように、シート７の表面及び第１の固定部材８の表面を被覆材（第１の被覆材）１０で被覆する。第１の被覆材１０にはポリウレア樹脂を用いることが好ましい。ポリウレア樹脂はスプレーで吹付塗装するのが好ましい。ポリウレア樹脂と第１の固定部材８との密着性を高めるために、ポリウレア樹脂を塗布する前に第１の固定部材８にプライマを塗布しておくことが好ましい。プライマには、例えばエポキシ樹脂、ウレタン樹脂などが用いられる。 [Step 7: First coating]
As shown in FIG. 4, the surface of the sheet 7 and the surface of the first fixing member 8 are covered with a covering material (first covering material) 10. It is preferable to use a polyurea resin for the first covering material 10. The polyurea resin is preferably spray-painted by spraying. In order to improve the adhesion between the polyurea resin and the first fixing member 8, it is preferable to apply a primer to the first fixing member 8 before applying the polyurea resin. For the primer, for example, an epoxy resin or a urethane resin is used.

図４及び図８（a）に示すように、第１の被覆材１０は、その上端部分をアンカー溝５まで伸ばしてアンカー溝５に充填し、端部の止水性を確保することが好ましい。これにより、第１の被覆材１０の端部からシート７や第１の被覆材１０の内側に外部の水（雨水等）が侵入することはないし、第１の被覆材１０の上端部分が側壁３に確実に保持されて安定する。   As shown in FIGS. 4 and 8 (a), it is preferable that the first covering material 10 has its upper end portion extended to the anchor groove 5 to fill the anchor groove 5 to ensure the water stoppage of the end portion. Thereby, external water (rain water or the like) does not enter the sheet 7 or the inside of the first covering material 10 from the end of the first covering material 10, and the upper end portion of the first covering material 10 is the side wall. 3 is securely held and stabilized.

［工程８：第２の固定部材（フラットバー）の施工］
図５に示すように、第１の被覆材１０の上に別の固定部材（第２の固定部材）１１を固定する。第２の固定部材１１は、第１の固定部材８と同じ大きさと材料のフラットバーを使ってもよいし、異なる材料又は異なる大きさのフラットバーを使っても良い。第２の固定部材１１の間隔も、第１の固定部材８の間隔と同じでもよいし、違ってもよい。第２の固定部材１１の固定方法も、第１の固定部材８の固定方法と同じである。 [Step 8: Construction of second fixing member (flat bar)]
As shown in FIG. 5, another fixing member (second fixing member) 11 is fixed on the first covering material 10. The second fixing member 11 may use a flat bar of the same size and material as the first fixing member 8, or may use a flat bar of a different material or a different size. The interval between the second fixing members 11 may be the same as or different from the interval between the first fixing members 8. The fixing method of the second fixing member 11 is also the same as the fixing method of the first fixing member 8.

［工程９：第２のライニング］
図６に示すように、第２の固定部材１１の上に第２の被覆材１２で被覆する。第２の被覆材１２には、第１の被覆材１０と同様のポリウレア樹脂を用いることが好ましい。ポリウレア樹脂はスプレーで吹付塗装するのが好ましい。ポリウレア樹脂と第２の固定部材１１との密着性を高めるために、ポリウレア樹脂を塗布する前に第２の固定部材１１にプライマを塗布しておくことが好ましい。プライマには、例えばエポキシ樹脂、ウレタン樹脂などが用いられる。 [Step 9: Second lining]
As shown in FIG. 6, the second fixing member 11 is covered with a second covering material 12. It is preferable to use the same polyurea resin as the first covering material 10 for the second covering material 12. The polyurea resin is preferably spray-painted by spraying. In order to improve the adhesion between the polyurea resin and the second fixing member 11, it is preferable to apply a primer to the second fixing member 11 before applying the polyurea resin. For the primer, for example, an epoxy resin or a urethane resin is used.

第２の被覆材１２は、第２の固定部材１１だけでなく第１の被覆材１０の表面のほぼ全体を覆ってもよいし、図７に示すように少なくとも第２の固定部材１１を被覆すればよく、第１の被覆材１０のほぼ全体を覆わなくてもよい。   The second covering material 12 may cover not only the second fixing member 11 but also almost the entire surface of the first covering material 10, or at least covers the second fixing member 11 as shown in FIG. It suffices to cover the entire first covering material 10.

図８（ａ）に示すように、第２の被覆材１２は、側壁３の上端領域にあるシート７で被覆されていない領域３ｂを覆ってもよい。ただし、この場合、図８（ｂ）に示すように、排水路４の上端部が大気に露出するように、第２の被覆材１２に開口１２を設けることが好ましい。   As shown in FIG. 8A, the second covering material 12 may cover a region 3 b that is not covered with the sheet 7 in the upper end region of the side wall 3. However, in this case, as shown in FIG. 8B, it is preferable to provide an opening 12 in the second covering material 12 so that the upper end portion of the drainage channel 4 is exposed to the atmosphere.

３．作用効果：
上述した実施形態の補修方法によれば、新たな被覆材でコンクリート表面を被覆するに際して、劣化したコンクリート部分を除去する必要がないし、またコンクリート表面を乾燥させる必要もない。そのため、補修に要する期間を大幅に短縮できる。 3. Effect:
According to the repair method of the above-described embodiment, when the concrete surface is coated with a new coating material, it is not necessary to remove the deteriorated concrete portion and it is not necessary to dry the concrete surface. Therefore, the period required for repair can be greatly shortened.

また、上述した実施形態の補修方法によれば、被覆材はコンクリート表面からシートによって分離されており、コンクリートから染み出た水（また、この水が高温排水によって加熱されて発生した蒸気）は、コンクリート表面とシートとの界面を通り、また、排水路を有する形態では排水材料を介して大気に排出される。そのため、被覆材に部分的な膨れを生じることもない。   Further, according to the repair method of the above-described embodiment, the covering material is separated from the concrete surface by a sheet, and water exuded from the concrete (and steam generated by heating this water by high-temperature waste water) In the form having a drainage channel through the interface between the concrete surface and the sheet, it is discharged to the atmosphere through drainage material. Therefore, partial swelling does not occur in the covering material.

さらに、上述した実施形態の補修方法によれば、被覆材はコンクリート表面に支持されるのではなく、固定部材によって支持される。そのため、使用条件（例えば、排水の温度や性質）によっては被覆材の内側にあるコンクリート表面が劣化しても、被覆材は剥落することなく固定部材によって確実に保持されるので、長期に亘って安定した被覆効果を発揮できる。   Furthermore, according to the repair method of the embodiment described above, the covering material is not supported on the concrete surface, but is supported by the fixing member. Therefore, even if the concrete surface inside the covering material deteriorates depending on the use conditions (for example, the temperature and properties of the drainage), the covering material is securely held by the fixing member without being peeled off. A stable covering effect can be exhibited.

４．変形例：
以上の説明では、第１及び第２の固定部材に長尺のフラットバーを使用したが、第１及び第２の固定部材はこれに限るものでなく、不連続的にシートを固定してもよい。 4). Variations:
In the above description, long flat bars are used for the first and second fixing members, but the first and second fixing members are not limited to this, and even if the sheet is fixed discontinuously. Good.

１：貯水槽
２：底壁
３：側壁
４：排水路
５：アンカー溝
６：排水材料
７：シート
８：第１の固定部材
９：コンクリート釘
１０：第１の被覆材
１１：第２の固定部材
１２：第２の被覆材
１３：開口 1: Water tank 2: Bottom wall 3: Side wall 4: Drainage channel 5: Anchor groove 6: Drainage material 7: Sheet 8: First fixing member 9: Concrete nail 10: First covering material 11: Second fixing Member 12: Second covering material 13: Opening

Claims (6)

既設コンクリート（２、３）の表面部分をシート（７）で被覆する工程１と、
工程１に続き、前記シート（７）の上に第１の固定部材（８）を配置する工程２と、
工程２に続き、前記第１の固定部材（８）を前記既設コンクリート（２，３）に固定する工程３と、
工程３に続き、前記シート（７）及び前記第１の固定部材（８）を第１の被覆材（１０）で被覆する工程４と、
工程４に続き、前記第１の被覆材（１０）の上に第２の固定部材（１２）を配置する工程５と、
工程５に続き、前記第２の固定部材（１２）を前記既設コンクリート（２，３）に固定する工程６と、
工程６に続き、前記第２の固定部材（１１）を第２の被覆材（１２）で被覆する工程７を含むコンクリート製貯水槽（１）を補修する方法。 Step 1 of covering the surface portion of the existing concrete (2, 3) with the sheet (7);
Following the step 1, the step 2 of disposing the first fixing member (8) on the sheet (7);
Following the step 2, the step 3 of fixing the first fixing member (8) to the existing concrete (2, 3);
Following the step 3, the step 4 of covering the sheet (7) and the first fixing member (8) with the first covering material (10),
Following the step 4, the step 5 of disposing a second fixing member (12) on the first covering material (10);
Following the step 5, the step 6 of fixing the second fixing member (12) to the existing concrete (2, 3);
The method of repairing the concrete water tank (1) including the process 7 which coat | covers the said 2nd fixing member (11) with the 2nd coating | covering material (12) following the process 6. FIG. 前記工程１の前に、
前記シート（７）で被覆される前記既設コンクリート（２，３）の表面部分の領域（３ａ）に排水路（４）を形成するとともに前記表面部分の外側の領域（３ｂ）に前記排水路（４）を伸ばす工程と、
前記排水路（４）に排水部材（６）を配置する工程を含み、
前記排水路（４）に配置された前記排水部材（６）を介して前記既設コンクリート（２，３）に含まれる水分を排水するようにしたことを特徴とする請求項１の方法。 Before step 1
The drainage channel (4) is formed in the region (3a) of the surface portion of the existing concrete (2, 3) covered with the sheet (7), and the drainage channel (3b) is formed in the region (3b) outside the surface portion. 4) extending the process;
Including a step of disposing a drainage member (6) in the drainage channel (4),
The method according to claim 1, wherein water contained in the existing concrete (2, 3) is drained through the drainage member (6) disposed in the drainage channel (4). 少なくとも前記第１の被覆材（１０）又は前記第２の被覆材（１２）のいずれかで被覆された前記既設コンクリートの表面部分に該表面部分の縁に沿って伸びるアンカー溝（５）を形成する工程を含み、
前記工程７は、前記第２の被覆材（１２）を前記アンカー溝（５）に充填して固定することを特徴とする請求項１又は２の方法。 An anchor groove (5) extending along an edge of the surface portion is formed in the surface portion of the existing concrete covered with at least either the first covering material (10) or the second covering material (12). Including the steps of:
The method according to claim 1 or 2, characterized in that the step 7 fills and fixes the second covering material (12) in the anchor groove (5). 前記第１の固定部材（８）と前記第２の固定部材（１１）の少なくとも一方が帯状の金属板であることを特徴とする請求項１〜３のいずれかの方法。   4. The method according to claim 1, wherein at least one of the first fixing member (8) and the second fixing member (11) is a strip-shaped metal plate. 前記第１の被覆材（１０）と第２の被覆材（１２）の両方又はいずれか一方がポリウレア樹脂であることを特徴とする請求項１〜４のいずれかの方法。   The method according to any one of claims 1 to 4, wherein both or one of the first covering material (10) and the second covering material (12) is a polyurea resin. 前記第１の被覆材がポリウレアであることを特徴とする請求項１〜５のいずれかの方法。   The method according to claim 1, wherein the first covering material is polyurea.
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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020007705A (en) * 2018-07-02 2020-01-16 株式会社ソーケン彩装 Repairing method of concrete water storage tank

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JPH01203556A (en) * 1988-02-05 1989-08-16 Kajima Corp Peripheral rise wall on roof section of building
JP2005076345A (en) * 2003-09-02 2005-03-24 Sanai Kk Repairing structure and repairing method of concrete tank
JP2008530408A (en) * 2005-02-17 2008-08-07 テク．イン・エス．アール．エル． Method of reinforcing a building and coating obtained thereby
JP2011174321A (en) * 2010-02-25 2011-09-08 Soken Saisou Corp Waterproof structure and waterproof structure forming method

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Publication number Priority date Publication date Assignee Title
JPH01203556A (en) * 1988-02-05 1989-08-16 Kajima Corp Peripheral rise wall on roof section of building
JP2005076345A (en) * 2003-09-02 2005-03-24 Sanai Kk Repairing structure and repairing method of concrete tank
JP2008530408A (en) * 2005-02-17 2008-08-07 テク．イン・エス．アール．エル． Method of reinforcing a building and coating obtained thereby
JP2011174321A (en) * 2010-02-25 2011-09-08 Soken Saisou Corp Waterproof structure and waterproof structure forming method

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2020007705A (en) * 2018-07-02 2020-01-16 株式会社ソーケン彩装 Repairing method of concrete water storage tank

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