JP2521740B2 - Dam reinforcement / repair method - Google Patents
Dam reinforcement / repair methodInfo
- Publication number
- JP2521740B2 JP2521740B2 JP62021498A JP2149887A JP2521740B2 JP 2521740 B2 JP2521740 B2 JP 2521740B2 JP 62021498 A JP62021498 A JP 62021498A JP 2149887 A JP2149887 A JP 2149887A JP 2521740 B2 JP2521740 B2 JP 2521740B2
- Authority
- JP
- Japan
- Prior art keywords
- dam
- new
- old
- reinforcement
- reinforcing
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired - Lifetime
Links
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- Working Measures On Existing Buildindgs (AREA)
Description
【発明の詳細な説明】 （イ）産業上の利用分野 本発明は、例えば、ダムの自重でダムの安定を確保す
る重力式ダムのかさ上げ等において有効に用いることが
できるダムの補強・補修方法に関する。DETAILED DESCRIPTION OF THE INVENTION (a) Field of Industrial Application The present invention can be effectively used for reinforcement and repair of a dam that can be effectively used, for example, in raising a gravity dam that ensures the stability of the dam by the weight of the dam. Regarding the method.
（ロ）従来技術 近年、既設重力式ダムの貯水量を増加するため、堤体
の高さを高くする、即ちかさ上げすることが行われてい
る。(B) Conventional Technology In recent years, in order to increase the amount of water stored in an existing gravity dam, the height of the bank has been increased, that is, the bulkhead has been raised.
かかるかさ上げ方法としては、各種形態が知られてお
り、その一つとして、第２図に示すように、旧堤体10の
背面に大量の新コンクリート（新堤体）11を配筋12等を
用いて打継いで、所望の高さにかさ上げ工事を行う方法
がある。Various forms are known as such a raising method, and as one of them, as shown in FIG. 2, a large amount of new concrete (new levee body) 11 is arranged on the rear surface of the old levee body 10 with reinforcing bars 12 or the like. There is a method in which the materials are spliced together and raised to a desired height.
また、一般のダムにおいても、補強・補修のために、
ダムの背面に大量の新コンクリートを打継施工する方法
が知られている。Also, for general dams, for reinforcement and repair,
It is known that a large amount of new concrete is spliced on the back of the dam.
（ハ）発明が解決しようとする問題点 しかしかかる補強・補修方法によって形成された新規
ダムにおいて、新堤体11は、打設コンクリートの水和発
熱現象、外気温の変化に伴う放熱現象、コンクリートの
硬化過程、コンクリートのクリープ現象、打設リフト順
序等の諸要因に起因する熱負荷によって、強大な内部応
力を受け、その結果、第３図に示すように撓みを生じ、
新堤体11は、その表面に亀裂を生じるのみならず、旧堤
体10から完全に剥離する場合もあり、堤体としての機能
を果たさなくなる場合もあった。(C) Problems to be solved by the invention However, in the new dam formed by such a reinforcement / repair method, the new dike body 11 has a hydration heat generation phenomenon of cast concrete, a heat radiation phenomenon caused by a change in outside temperature, Due to the heat load caused by various factors such as hardening process, concrete creep phenomenon, and placing lift order, a large internal stress is applied, and as a result, bending occurs as shown in FIG.
The new bank 11 not only cracked on the surface but also completely separated from the old bank 10, sometimes failing to function as a bank.
本発明はこのような従来技術が有する問題点を解決す
ることができるダムの補強・補修方法を提供することを
目的とする。It is an object of the present invention to provide a dam reinforcing / repairing method capable of solving the problems of the prior art.
（ニ）問題点を解決するための手段 本発明は、ダムの旧堤体の少なくとも背面に新堤体を
打継・接合してダムの補修・補強を行う方法において、
旧堤体と新堤体とを接着剤を用いて打継・接合し、同接
着剤として、カルボキシ変性スチレンブタジエン、メタ
クリル酸シクロヘキシルを主成分としてなる複合ポリマ
ーエマルジョンを、酸化珪素、酸化カルシウム、酸化鉄
を主成分とした主剤に混合して製造した表面塗布剤を用
いることを特徴するダムの補強・補修方法に係るもので
ある。(D) Means for Solving the Problems The present invention relates to a method for repairing / reinforcing a dam by connecting / joining a new dam body to at least the back surface of the old dam body,
The old dam body and the new dam body are spliced and joined using an adhesive, and as the adhesive, a composite polymer emulsion mainly composed of carboxy-modified styrene butadiene and cyclohexyl methacrylate is used as silicon oxide, calcium oxide, iron oxide. The present invention relates to a method for reinforcing and repairing a dam, characterized by using a surface coating agent produced by mixing it with a main component containing as a main component.
（ホ）作用及び効果 上記組成を有する表面塗布剤は強大な接着強さを有す
るので、旧堤体に新堤体を強力に接着することができ、
打継・接合によって発生する熱負荷・内部応力に対して
も十分に対抗することができ、確実な補強・補修を行う
ことができる。(E) Action and effect Since the surface coating agent having the above composition has a strong adhesive strength, the new bank can be strongly bonded to the old bank,
It is possible to sufficiently counter the heat load and internal stress generated by splicing and joining, and it is possible to perform reliable reinforcement and repair.
重力式ダムのかさ上げに用いる場合は、所望のかさ上
げを極めて容易に行うことができる。When used for raising the gravity dam, the desired raising can be performed very easily.
単に旧堤体と新堤体との接合面に表面塗布剤を塗布す
るだけで上記効果あげることができるので、配筋作業
等の補強工事を簡素化でき、全体としての補強・補修工
事の能率化を図ることができる。The above effect can be achieved simply by applying a surface coating agent to the joint surface between the old dam body and the new dam body, so that reinforcement work such as reinforcement work can be simplified and the efficiency of reinforcement and repair work as a whole can be improved. Can be achieved.
（ヘ）実施例 以下、添付図に示す実施例に基づいて、本発明を詳説
する。なお、本実施例は、重力式ダムのかさ上げに本発
明に係る補強・補修方法を用いた場合である。(F) Example Hereinafter, the present invention will be described in detail based on an example shown in the accompanying drawings. The present embodiment is a case where the reinforcing / repairing method according to the present invention is used for raising the gravity dam.
第１図に、本発明に係る方法によってかさ上げを行っ
た重力式のダムＡの全体構造を示しており、図中、１は
前面1aを略垂直面となし、背面1bを傾斜面とした旧堤体
であり、同旧堤体１は、その背面1b及び上面に渡って新
堤体２を打継・接合している。なお、かかる新堤体２
は、かさ上げ部2aと背面形成部2bとからなる。FIG. 1 shows the overall structure of a gravity-type dam A that has been raised by the method according to the present invention. In the figure, reference numeral 1 designates a front surface 1a as a substantially vertical surface and a back surface 1b as an inclined surface. It is an old dam body, and the old dam body 1 is connected and joined to the new dam body 2 over the back surface 1b and the upper surface thereof. In addition, such new bank 2
Consists of a raised portion 2a and a back surface forming portion 2b.
本発明は、上記構成において、旧堤体１の背面1bと新
堤体２の内面との接合部に、カルボキシ変性スチレンブ
タジエン、メタクリル酸シクロヘキシルを主成分として
なる複合ポリマーエマルジョンと、酸化珪素、酸化カル
シウム、酸化鉄を主成分とした主剤に混合して製造した
表面塗布剤３を介在させたことを特徴を有する。According to the present invention, in the above structure, a composite polymer emulsion containing carboxy-modified styrene butadiene and cyclohexyl methacrylate as main components, silicon oxide and calcium oxide are provided at the joint between the back surface 1b of the old dam body 1 and the inner surface of the new dam body 2. It is characterized in that the surface coating agent 3 produced by mixing with the main component containing iron oxide as the main component is interposed.
かかる表面塗布剤３の成分組成について説明すると、
以下の如くなる。Explaining the component composition of the surface coating agent 3,
It becomes as follows.
まず、複合ポリマーエマルジョンの配合例及び配合順
序を、２例説明すると、 例１） （重量） カルボキシ変性スチレンブタジエン 13 ％ メタクリル酸シクロヘキシル− 56 ％ スチレン重合体 脂肪酸ソーダ石鹸 1 ％ 水 30 ％ この配合順序は、まず、蒸留水または軟水に脂肪酸ソ
ーダ石鹸を入れて溶解し、次にカルボキシ変性スチレン
ブタジエンを徐々に加えて混合、撹拌し、次ぎにメタク
リル酸シクロヘキシル−スチレンブタジエン共重合体ラ
テックスを徐々に加えて、混合撹拌し、各ポリマーの水
中分散液とする。First, two compounding examples and compounding order of the composite polymer emulsion will be described. Example 1) (weight) Carboxy-modified styrene butadiene 13% Cyclohexyl methacrylate-56% Styrene polymer Fatty acid soda soap 1% Water 30% This compounding order First, add fatty acid soda soap to distilled water or soft water to dissolve it, then slowly add carboxy-modified styrene butadiene and mix and stir, then slowly add cyclohexyl methacrylate-styrene butadiene copolymer latex. Then, the mixture is mixed and stirred to obtain a dispersion of each polymer in water.
例２） （重量） カルボキシ変性スチレンブタジエン 13 ％ スチレン 28 ％ メタクリル酸シクロヘキシル 28 ％ 脂肪酸ソーダ石鹸 1 ％ 水 30 ％ この配合順序は、まず、蒸留水または軟水に脂肪酸ソ
ーダ石鹸を入れて溶解し、次にカルボキシ変性スチレン
ブタジエンを徐々に加えて混合、撹拌し、次ぎにスチレ
ンラテックスを加えて撹拌し、次にメタクリル酸シクロ
ヘキシルを徐々に加えて、混合撹拌し、各ポリマーの水
中分散液とする。Example 2) (Weight) Carboxy-modified styrene butadiene 13% Styrene 28% Cyclohexyl methacrylate 28% Fatty acid soda soap 1% Water 30% This compounding order is as follows: first, dissolve the fatty acid soda soap in distilled water or soft water, and then dissolve it. The carboxy-modified styrene-butadiene is gradually added to and mixed with and stirred, then styrene latex is added and stirred, and then cyclohexyl methacrylate is gradually added and mixed and stirred to obtain a dispersion liquid of each polymer in water.
次に、上記２例の複合ポリマーエマルジョンと混合す
べき主剤の配合例及び配合手順について説明すると、配
合例は、 （重量） 白色セメント 28.0 ％ 珪砂（SiO2） 71.0 ％ 鉄粉（Fe3O4） 0.2 ％ 亜鉛華（ZnO） 0.1 ％ チタン白（TiO2） 0.1 ％ グリシン他 0.6 ％ であり、上記白色セメントの成分重量比は、 （重量） CaO 65.4 ％ SiO2 23.1 ％ Fe2O3 0.2 ％ Igloss 2.7 ％ insol 0.2 ％ Al2O3 4.3 ％ MgO 0.6 ％ SO3 2.8 ％ その他 0.7 ％ であり、上記主剤の配合手順は、まず硅砂を焼いて有機
物を取り除き、粒度を50〜150μｍに整え、この硅砂を
ミキサーに投入し、白色セメントを徐々に加えて混合さ
せ、更に、鉄粉（Fe3O4）、亜鉛華（ZnO）、チタン白
（TiO2）、グリシン他の順で加えながら、均一に成るよ
うに混合する。Next, a description will be given of a compounding example of the main agent to be mixed with the composite polymer emulsion of the above two examples and a compounding procedure. The compounding example is (weight) white cement 28.0% silica sand (SiO 2 ) 71.0% iron powder (Fe 3 O 4 ) 0.2% Zinc white (ZnO) 0.1% Titanium white (TiO 2 ) 0.1% Glycine and other 0.6%. The component weight ratio of the above white cement is (weight) CaO 65.4% SiO 2 23.1% Fe 2 O 3 0.2% Igloss 2.7% insol 0.2% Al 2 O 3 4.3% MgO 0.6% SO 3 2.8% Other 0.7%. The compounding procedure of the main agent is as follows. First, remove the organic matter by baking silica sand and adjust the particle size to 50-150 μm. Pour silica sand into the mixer, gradually add white cement and mix, and then add iron powder (Fe 3 O 4 ), zinc white (ZnO), titanium white (TiO 2 ), glycine, etc. Mix so that
次ぎに、上記した主剤及び複合ポリマーエマルジョン
を混合して表面塗布剤を製造する方法の１例について説
明すると、塗膜厚さが0.6〜1.0mmで塗布面積が1m2の場
合、主剤1kgと複合ポリマーエマルジョン190g,それに軟
水6gを入れて混合するものであり、この混合順序は、ま
ず、複合ポリマーエマルジョンを容器に入れ、次に主剤
を徐々に加えながら３分〜５分撹拌し、更に、蒸留水又
は軟水又は水道水を適量加えて希釈し、撹拌しながら施
工する。Next, an example of a method for producing a surface coating agent by mixing the above-described main agent and complex polymer emulsion will be explained. When the coating film thickness is 0.6 to 1.0 mm and the coating area is 1 m 2 , the main agent is mixed with 1 kg. Polymer emulsion (190 g) and soft water (6 g) are added and mixed. The mixing order is as follows. First, put the composite polymer emulsion in a container, then stir for 3 to 5 minutes while gradually adding the main agent, and further distill. Dilute by adding an appropriate amount of water, soft water or tap water, and perform the work while stirring.
なお、前記各ラテックスの固形分は全て約40〜50％程
度のものを用いている。The solid content of each latex is about 40 to 50%.
また、白セメントに代えて、ポルトランドセメントを
用いることもできる。Portland cement may be used instead of white cement.
このようにして製造された表面塗布剤３を、旧堤体１
の背面1bと新堤体２の内面との接合部に、介在させるこ
とによって、旧堤体１と新堤体２とは強固に一体的に接
着され、新堤体２は、打設コンクリートの水和発熱現
象、外気温の変化に伴う放熱現象、コンクリートの硬化
過程、コンクリートのクリープ現象、打設リフト順序等
の諸要因に起因する熱負荷によって、強大な内部応力を
受けても、十分に耐えることができ、所望のかさ上げを
得ることができるとともに、新堤体２が旧堤体１から剥
離するのを確実に防止して、旧堤体１と長年にわたり一
体化することができる。The surface coating agent 3 produced in this manner was used as the old bank 1
By intervening at the joint between the back surface 1b of the and the inner surface of the new dam body 2, the old dam body 1 and the new dam body 2 are firmly and integrally bonded, and the new dam body 2 is heated by the hydration heat of the cast concrete. Phenomenon, heat dissipation phenomenon due to changes in outside temperature, concrete hardening process, concrete creep phenomenon, heat load caused by various factors such as the order of placing lift, etc., can withstand even a large internal stress. Therefore, the desired bulge can be obtained, the new levee body 2 can be surely prevented from peeling off from the old levee body 1, and can be integrated with the old levee body 1 for many years.
なお、第１図において、４は必要に応じて、旧堤体１
と新堤体２とを連結するため施す鉄筋等の配筋である。In FIG. 1, the reference numeral 4 indicates the old embankment 1 if necessary.
It is a reinforcement such as a reinforcing bar that is provided to connect the new levee body 2 with the new levee body 2.
そして、この鉄筋４にも上記表面塗布剤３を塗布する
ことによって、旧堤体１と新堤体２との接着・連結強度
をさらに高めることができる。Then, by applying the surface coating agent 3 also to the reinforcing bars 4, the bonding / connecting strength between the old dam body 1 and the new dam body 2 can be further enhanced.
第１図は本発明に係るダムの補強・補修方法によってか
さ上げ作業を行った重力式ダムの断面図、第２図は従来
のダムの補強・補修方法によってかさ上げ作業を行った
重力式ダムの断面図、第３図は内部応力を受けた場合の
第２図の重力式ダムの断面図である。 図中、 A:ダム 1:旧堤体 1a:前面、1b:背面 2:新堤体 2a:かさ上げ部、2b:背面形成部 3:新堤体、4:配筋 10:旧堤体、11:新堤体 12:配筋FIG. 1 is a cross-sectional view of a gravity dam that has been lifted by the dam reinforcement / repair method according to the present invention, and FIG. 2 is a gravity dam that has been lifted by a conventional dam reinforcement / repair method. FIG. 3 is a sectional view of the gravity dam of FIG. 2 when subjected to internal stress. In the figure, A: Dam 1: Old levee body 1a: Front face, 1b: Rear face 2: New levee body 2a: Raised part, 2b: Rear formation part 3: New levee body, 4: Bar arrangement 10: Old levee body, 11: New bank 12: Bar arrangement
Claims (1)
面に新堤体（２）を打継・接合してダムの補強・補修を
行う方法において、 旧堤体（１）と新堤体（２）とを接着剤を用いて、打継
・接合し、同接着剤として、カルボキシ変性スチレンブ
タジエン、メタクリル酸シクロヘキシルを主成分として
なる複合ポリマーエマルジョンを、酸化珪素、酸化カル
シウム、酸化鉄を主成分とした主剤に混合して製造した
表面塗布剤（３）を用いることを特徴とするダムの補強
・補修方法。1. A method of reinforcing and repairing a dam by connecting and joining a new dam body (2) to at least the rear surface of the old dam body (1) of the dam (A). The body (2) and the body (2) are spliced and joined using an adhesive, and as the adhesive, a composite polymer emulsion containing carboxy-modified styrene butadiene and cyclohexyl methacrylate as main components, silicon oxide, calcium oxide, and iron oxide. A method for reinforcing and repairing a dam, which comprises using a surface coating agent (3) produced by mixing with a main component as a main component.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62021498A JP2521740B2 (en) | 1987-01-30 | 1987-01-30 | Dam reinforcement / repair method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP62021498A JP2521740B2 (en) | 1987-01-30 | 1987-01-30 | Dam reinforcement / repair method |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS63189512A JPS63189512A (en) | 1988-08-05 |
| JP2521740B2 true JP2521740B2 (en) | 1996-08-07 |
Family
ID=12056629
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP62021498A Expired - Lifetime JP2521740B2 (en) | 1987-01-30 | 1987-01-30 | Dam reinforcement / repair method |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JP2521740B2 (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011111849A (en) * | 2009-11-30 | 2011-06-09 | Ministry Of Land Infrastructure & Transport Hokkaido Regional Development Bureau | Method of constructing mass concrete structure |
-
1987
- 1987-01-30 JP JP62021498A patent/JP2521740B2/en not_active Expired - Lifetime
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2011111849A (en) * | 2009-11-30 | 2011-06-09 | Ministry Of Land Infrastructure & Transport Hokkaido Regional Development Bureau | Method of constructing mass concrete structure |
Also Published As
| Publication number | Publication date |
|---|---|
| JPS63189512A (en) | 1988-08-05 |
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