JP2015172108A - Sealant - Google Patents

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JP2015172108A
JP2015172108A JP2014047576A JP2014047576A JP2015172108A JP 2015172108 A JP2015172108 A JP 2015172108A JP 2014047576 A JP2014047576 A JP 2014047576A JP 2014047576 A JP2014047576 A JP 2014047576A JP 2015172108 A JP2015172108 A JP 2015172108A
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sealing material
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JP6341698B2 (en
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浩一朗 安野
Koichiro Yasuno
浩一朗 安野
正稔 藤原
Masatoshi Fujiwara
正稔 藤原
勇司 前田
Yuji Maeda
勇司 前田
研也 高橋
Kenya Takahashi
研也 高橋
英樹 山口
Hideki Yamaguchi
英樹 山口
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Penta Ocean Construction Co Ltd
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Abstract

PROBLEM TO BE SOLVED: To provide a sealant that does not comprise the components preventing the curing of cement and has water cut-off properties and lubricity.SOLUTION: The sealant comprises water, and a seal material added in an amount of 10.0 pts.wt. or more and 14.0 pts.wt. or less with respect to the water 100 pts.wt. The seal material comprises water-soluble cellulose viscosity improver, fibrous filler with a diameter or thickness of 0.1 mm or more, and a length of 0.5 mm or more, vinyl acetate copolymer, and organic antifoaming agent.

Description

本発明は、シールド掘削機などに用いられるテールクリアランス充填用のシール材に関する。   The present invention relates to a sealing material for tail clearance filling used in shield excavators and the like.

シールド掘削機のテールシール構造には、特許文献1〜3に示すものなどがある。テールシール構造とセグメントとの間には、掘削時に隙間(テールクリアランス)が生じる。この隙間を介して地盤からの漏水や背後の外周部分に充填する裏込め材が漏洩することを防止するためにテールクリアランス充填用シール材(テールシール材)が用いられる。   Examples of tail seal structures for shield excavators include those shown in Patent Documents 1 to 3. A gap (tail clearance) is generated between the tail seal structure and the segment during excavation. A tail clearance filling sealing material (tail sealing material) is used to prevent leakage from the ground through the gap and leakage of the backfill material filling the outer peripheral portion behind the ground.

シール材は、止水、裏込め材の漏洩防止、およびシールド掘削機の滑剤としての役割を担っている。
シールド掘削機に用いられるシール材には、水およびカルシウム石鹸と鉱油とポリプロピレン樹脂を含むもの(特許文献4、段落21参照)や、グワガムあるいはその変性品、ローカストビーンガム、ガラクトマンノース重合体を主成分とする天然高分子などを含むもの(特許文献5、段落15参照)などがある。また、繊維状充填剤として、ベントナイトやモンモリロナイトなどの鉱物系の繊維状物質を含むシール材(特許文献6、段落19参照)も提案されている。
The sealing material plays a role of water stopping, leakage prevention of the backfill material, and a lubricant for the shield excavator.
Sealing materials used in shield excavators mainly include water, calcium soap, mineral oil, and polypropylene resin (see Patent Document 4, paragraph 21), guagam or modified products thereof, locust bean gum, and galactomannose polymer. There are those containing natural polymers as components (see Patent Document 5, paragraph 15). In addition, as a fibrous filler, a sealing material containing a mineral fibrous material such as bentonite or montmorillonite has been proposed (see Patent Document 6, paragraph 19).

また、特許文献7には、水溶性の高分子系増粘剤としてカルボキシメチルセルロース、メチルセルロースなどの水溶性のセルロースエーテル、天然ガムおよび人工ガムの中から選ばれる少なくとも1種を含有するシール材が記載されている。特許文献7に記載されたシール材は油分を主成分としていないため、火気による事故の危険が少なく、また、裏込め材に用いられるセメントミルクに混ざった場合にも、油分を主成分とするシール材に比べて、硬化性能に悪影響を及ぼす可能性が低い(段落35参照)。   Patent Document 7 describes a sealing material containing at least one selected from water-soluble cellulose ethers such as carboxymethyl cellulose and methyl cellulose, natural gums and artificial gums as water-soluble polymer thickeners. Has been. Since the sealing material described in Patent Document 7 does not contain oil as a main component, there is little risk of accidents due to fire, and even when mixed with cement milk used as a backfill material, the sealing material contains oil as a main component. Compared to the material, it is less likely to adversely affect the curing performance (see paragraph 35).

特開2001−40998号公報JP 2001-40998 A 特開2001−355393号公報JP 2001-355393 A 特開2011−42938号公報JP 2011-42938 A 特開平7−109893号公報JP 7-109893 A 特許3235425号明細書Japanese Patent No. 3235425 特開2001−115777号公報JP 2001-115777 A 特許2938418号明細書Japanese Patent No. 2938418

例えば特許文献4に記載されたシール材では、軟膏状を呈する基剤に油分が含まれているため、セメント系の裏込め材との接触によりセメントの硬化反応を阻害する可能性がある。また、ポリプロピレンなどの樹脂材料は、シール材の充填性や接着性を向上させる硬化を有するものの、硬いためにテールクリアランスに充填する際に抵抗が生じ、配管の目詰りが生じ易いなどの課題がある。
また、例えば特許文献5に記載されたシール材では、繊維状充填剤がないため止水性が低く、天然高分子とゲル化剤を用いる必要があるため、地盤条件によってはpHの違いによる粘性にばらつきが生じ、シール材としての性能にもばらつきが生じ易いという課題がある。
For example, in the sealing material described in Patent Document 4, since the oil component is contained in the base material having an ointment shape, there is a possibility that the cement hardening reaction may be inhibited by contact with the cement-based backfill material. In addition, although resin materials such as polypropylene have a curing property that improves the filling property and adhesiveness of the sealing material, they are hard, so there is a problem that resistance occurs when filling the tail clearance, and pipe clogging is likely to occur. is there.
Further, for example, in the sealing material described in Patent Document 5, since there is no fibrous filler, the water-stopping property is low, and it is necessary to use a natural polymer and a gelling agent. There is a problem that variations occur and the performance as a sealing material is likely to vary.

本発明の目的の1つは、セメントの硬化を妨げる成分を含まず、かつ、止水性および潤滑性を有するシール材を提供することである。   One of the objects of the present invention is to provide a sealing material that does not contain a component that hinders the hardening of cement and has water-stopping property and lubricity.

上述した課題を解決するため、本発明に係るシール材は、水と、シール素材とを有し、前記シール素材は、水溶性のセルロース系増粘剤と、直径または厚さが0.1ミリメートル以上であり、かつ、長さが0.5ミリメートル以上の繊維状の充填剤と、酢酸ビニル系共重合体と、有機系の消泡剤とを含むことを特徴とする。   In order to solve the above-described problems, a sealing material according to the present invention has water and a sealing material, and the sealing material has a water-soluble cellulosic thickener and a diameter or thickness of 0.1 mm. It is the above, It is characterized by including the fibrous filler whose length is 0.5 millimeters or more, a vinyl acetate type copolymer, and an organic type antifoamer.

好ましくは、前記シール素材は、前記水100重量部に対して、10.0重量部以上14.0重量部以下の添加量で添加されるとよい。   Preferably, the sealing material is added in an addition amount of 10.0 parts by weight or more and 14.0 parts by weight or less with respect to 100 parts by weight of the water.

好ましくは、前記セルロース系増粘剤は、粉黛状であって水と混合することで水の粘性を上昇させる特性を有するとよい。   Preferably, the cellulosic thickener is powdery and has a characteristic of increasing the viscosity of water by mixing with water.

また、上述の態様において、前記充填剤は、直径または厚さが2ミリメートル以下であり、かつ、長さが30ミリメートル以下であることが望ましい。   In the above-described aspect, it is desirable that the filler has a diameter or thickness of 2 millimeters or less and a length of 30 millimeters or less.

また、上述の態様において、前記消泡剤の含有率は、出来上がり量に対して少なくとも0.3%以上であることが望ましい。   Moreover, in the above-mentioned aspect, it is desirable that the content of the antifoaming agent is at least 0.3% with respect to the finished amount.

また、上述の態様において、前記酢酸ビニル系共重合体の含有率は、出来上がり量に対して1%以上4%以下であることが望ましい。   In the above-described aspect, the content of the vinyl acetate copolymer is preferably 1% or more and 4% or less with respect to the finished amount.

本発明のシール材は、セメントの硬化を妨げる成分を含まず、かつ、止水性および潤滑性を有する。   The sealing material of the present invention does not contain a component that hinders the hardening of the cement, and has water-stopping properties and lubricity.

本発明において、シール材は、水にシール素材を添加することで製造される。シール素材には、少なくとも水溶性のセルロース系増粘剤と、繊維状の充填剤と、酢酸ビニル系共重合体と、有機系の消泡剤とを含む。   In the present invention, the sealing material is manufactured by adding a sealing material to water. The sealing material includes at least a water-soluble cellulose thickener, a fibrous filler, a vinyl acetate copolymer, and an organic antifoaming agent.

セルロース系増粘剤は、メチルセルロース、カルボキシエチルセルロースなどを含む粉黛状の物質であり、試験ふるい250マイクロメートル(μm)、ASTMメッシュNo.60に対し80%から90%が通過する。このセルロース系増粘剤は、水と混合することでその水の粘性を上昇させる特性を有する。このセルロース系増粘剤を含むことにより、水の粘性が上昇し、シール材はクリアランス空間内における追随性が向上する。   The cellulosic thickener is a powdery material containing methylcellulose, carboxyethylcellulose, etc., test sieve 250 micrometers (μm), ASTM mesh No. From 60 to 80% to 90% pass. This cellulosic thickener has the property of increasing the viscosity of water by mixing with water. By including this cellulosic thickener, the viscosity of water is increased, and the followability in the clearance space of the sealing material is improved.

繊維状の充填剤は、ポリプロピレン、ポリエチレン、ゴムや、アクリル樹脂などを含む粉末状繊維材である。この充填剤は、直径または厚さが0.1ミリメートル以上であり、かつ、長さが0.5ミリメートル以上の形状を有する。なお、充填剤は、直径または厚さが2ミリメートル以下であり、かつ、長さが30ミリメートル以下であることが望ましい、これらを超える直径もしくは厚さ、または長さを有すると、充填剤が配管やポンプを詰まらせる可能性があるためである。この充填剤を含むことにより、シール材は、テールクリアランスの止水性が向上する。   The fibrous filler is a powdered fiber material containing polypropylene, polyethylene, rubber, acrylic resin, or the like. This filler has a shape with a diameter or thickness of 0.1 mm or more and a length of 0.5 mm or more. The filler preferably has a diameter or thickness of 2 millimeters or less and a length of 30 millimeters or less. When the filler has a diameter or thickness or length exceeding these, the filler is piped. This may cause clogging. By including this filler, the sealing material improves the water resistance of tail clearance.

酢酸ビニル系共重合体は、エチレン系、ポリエチレン系などがあり、セメントに対する皮膜剤として広く用いられ、硬化反応を妨げずにセメントスラリーの性状を良好にする効能を有するものである。この酢酸ビニル系共重合体は、適度な接着性とべたつきを持たせるためにセメントと予め混ぜ合わせる左官材材料としても活用されている。この酢酸ビニル系共重合体を含むことにより、シール材は、充填剤とシールド掘削機との摩擦抵抗を低く抑えつつ、適度な接着性を生じさせる。   Vinyl acetate-based copolymers include ethylene-based and polyethylene-based copolymers, and are widely used as coating agents for cement, and have the effect of improving the properties of cement slurry without hindering the curing reaction. This vinyl acetate copolymer is also used as a plastering material that is premixed with cement in order to have appropriate adhesion and stickiness. By including this vinyl acetate-based copolymer, the sealing material generates appropriate adhesiveness while keeping the frictional resistance between the filler and the shield excavator low.

消泡剤には、シリコン系やオイル系などがあるが、ここでは有機系の消泡剤が用いられる。この消泡剤を含むことにより、シール材は、充填剤と水とを混ぜ合わせるときやクリアランス内でシールド掘削機が移動したときなどに空気が混入することを防止し、混入した空気により止水性が低下することを抑制する。   There are silicon-based and oil-based antifoaming agents, but organic antifoaming agents are used here. By including this antifoaming agent, the sealing material prevents air from entering when mixing the filler and water, or when the shield excavator moves within the clearance, etc. Is suppressed.

水溶性のセルロース系増粘剤と、繊維状の充填剤と、酢酸ビニル系共重合体と、有機系の消泡剤とを含むシール素材を水に添加して得られるシール材は、セメントの硬化を妨げず、かつ、良好な止水性および潤滑性を有することが分かった。   A sealing material obtained by adding a sealing material containing water-soluble cellulose thickener, fibrous filler, vinyl acetate copolymer, and organic antifoaming agent to water is made of cement. It has been found that it does not impede curing and has good water stopping and lubricity.

(1)シール素材の添加量
(a)試料
増粘剤、充填剤、酢酸ビニル系共重合体、および消泡剤を表1に示す組成(重量百分率)で混合し、シール素材A、シール素材B、およびシール素材Cをそれぞれ作成した。
増粘剤には、関東化学株式会社製のメチルセルロース(CAS番号:9004−67−5)を用いた。
充填剤としては、セルロース系充填剤とアクリル系充填剤とを用いた。セルロース系充填剤には、セルロースを主成分とする古紙を長さ1ミリメートル程度の繊維状に作成したものを用いた。アクリル系充填剤には、長さ5ミリメートル程度のアクリル毛糸を用いた。
酢酸ビニル系共重合体には、エチレン酢酸ビニル共重合体(CAS番号:24937−78−8)の試薬品を用いた。
消泡剤は、関東化学株式会社製のポリエーテル系消泡剤(試薬品)を用いた。
なお、表1に示すように、シール素材Aに用いた充填剤は、セルロース系充填剤のみを用いており、アクリル系充填剤を用いていない。また、シール素材Bには、セルロース系充填剤とアクリル系充填剤とを1:2の重量比で混合し、シール素材Cには、アクリル系充填剤のみを用いた。シール素材Aは、試料1〜5,16〜21に、シール素材Bは試料6〜15,22〜27に、シール素材Cは試料28〜33に、それぞれ用いた。

Figure 2015172108
なお、表中の組成はシール素材における割合(重量百分率)である。 (1) Addition amount of seal material (a) Sample A thickener, a filler, a vinyl acetate copolymer and an antifoaming agent are mixed in the composition (weight percentage) shown in Table 1, and seal material A and seal material are mixed. B and seal material C were prepared.
Methyl cellulose (CAS number: 9004-67-5) manufactured by Kanto Chemical Co., Ltd. was used as the thickener.
As the filler, a cellulose filler and an acrylic filler were used. As the cellulosic filler, used was a waste paper mainly composed of cellulose prepared in a fibrous form having a length of about 1 mm. As the acrylic filler, an acrylic yarn having a length of about 5 mm was used.
As the vinyl acetate copolymer, a reagent product of ethylene vinyl acetate copolymer (CAS number: 24937-78-8) was used.
As the antifoaming agent, a polyether antifoaming agent (reagent product) manufactured by Kanto Chemical Co., Ltd. was used.
In addition, as shown in Table 1, the filler used for the sealing material A uses only the cellulose-based filler and does not use the acrylic-based filler. For the sealing material B, a cellulose-based filler and an acrylic-based filler were mixed at a weight ratio of 1: 2, and for the sealing material C, only an acrylic-based filler was used. Seal material A was used for samples 1 to 5, 16 to 21, seal material B was used for samples 6 to 15 and 22 to 27, and seal material C was used for samples 28 to 33.
Figure 2015172108
In addition, the composition in a table | surface is a ratio (weight percentage) in a sealing raw material.

(b)試験方法
ちょう度は、JISのK2220:2013規格「グリース」に定める「ちょう度試験方法」により、表2に示すように水に対するシール素材Aの添加量を調整した試料1〜5を測定した。
耐圧試験は、実際のシールド機の外周部にあるワイヤーブラシに、表3に示すように水に対するシール素材Bの添加量を調整した試料6〜10をそれぞれ塗りこんで、試験水圧を1〜10重量キログラム毎平方センチメートル(kgf/cm)に変化させて、目視により漏れを確認することにより、行った。
(B) Test method Consistency was measured by using samples 1 to 5 in which the amount of the seal material A added to water was adjusted as shown in Table 2 according to “Consistency test method” defined in JIS K2220: 2013 “grease” It was measured.
In the pressure resistance test, samples 6 to 10 in which the amount of the seal material B added to water is adjusted as shown in Table 3 are applied to the wire brush on the outer periphery of the actual shield machine, and the test water pressure is set to 1 to 10. The test was performed by changing the weight to kilogram per square centimeter (kgf / cm 2 ) and visually confirming the leakage.

試料は、試験の結果によりシール材として特に適しているものを「良」として、使用可能なものを「可」として評価した。シール材として特に適していると評価する条件は、ちょう度が220以上295未満であり(JIS規格における2号または3号に相当)、耐圧試験において漏れが認められないこととした。   Samples that were particularly suitable as sealing materials were evaluated as “good” and those that could be used were evaluated as “good” based on the test results. The conditions evaluated to be particularly suitable as a sealing material were a consistency of 220 or more and less than 295 (corresponding to No. 2 or No. 3 in the JIS standard), and no leakage was observed in the pressure resistance test.

(c)結果
表2は、シール素材としてシール素材Aを用いた試料1〜5についての測定結果を示す表である。試料1はちょう度が295以上であり、試料5はちょう度が220未満であったため、それぞれ「可」と評価した。

Figure 2015172108
(C) Result Table 2 is a table | surface which shows the measurement result about the samples 1-5 which used the sealing raw material A as a sealing raw material. Since sample 1 had a consistency of 295 or higher and sample 5 had a consistency of less than 220, each sample was evaluated as “good”.
Figure 2015172108

表3は、シール素材としてシール素材Bを用いた試料6〜10についての試験結果を示す表である。試料6,10では漏れが認められたため、いずれも「可」と評価した。水100重量部に対する添加量が10重量部である試料7では、試験水圧が5重量キログラム毎平方センチメートルのときに、若干の漏れが認められ、水100重量部に対する添加量が14重量部である試料9では、試験水圧が1重量キログラム毎平方センチメートルのときに、若干の漏れが認められたが、いずれも使用に際して問題のない程度であったため、「良」と評価した。

Figure 2015172108
(注)若干の漏れが認められる。 Table 3 is a table | surface which shows the test result about the samples 6-10 which used the sealing raw material B as a sealing raw material. Since leakage was observed in Samples 6 and 10, both were evaluated as “OK”. In sample 7, which is 10 parts by weight added to 100 parts by weight of water, when the test water pressure is 5 weight kilograms per square centimeter, a slight leak is observed, and the amount added to 100 parts by weight of water is 14 parts by weight. In No. 9, a slight leak was observed when the test water pressure was 1 kilogram per square centimeter, but all of them showed no problem in use, and thus were evaluated as “good”.
Figure 2015172108
(Note) Some leakage is observed.

表2および表3の結果から、水100重量部に対するシール素材の添加量は、10.0重量部以上14.0重量部以下が望ましいことがわかった。   From the results of Tables 2 and 3, it was found that the amount of the sealing material added to 100 parts by weight of water is preferably 10.0 parts by weight or more and 14.0 parts by weight or less.

(2)消泡剤の含有率
(a)試料
上述したシール素材Bのうち消泡剤の組成を調整して、出来上がり量に対する消泡剤の含有率を0.0,0.3,0.5,1.0,2.0%に変化させて試料11〜15を作成した。ここでシール素材Bのうち、消泡剤以外の成分の比率を変えず、かつ、水100重量部に対するシール素材Bの添加量が13重量部になるようにした。
(2) Content of antifoaming agent (a) sample The composition of the antifoaming agent in the sealing material B described above is adjusted, and the content of the antifoaming agent relative to the finished amount is 0.0, 0.3, 0. Samples 11 to 15 were prepared by changing the content to 5, 1.0, and 2.0%. Here, the ratio of components other than the antifoaming agent in the sealing material B was not changed, and the amount of the sealing material B added to 100 parts by weight of water was 13 parts by weight.

(b)試験方法
空隙率は、200ccの容器に充填した後の容積を測定することにより、算出した。
試料は、試験の結果によりシール材として特に適しているものを「良」として、使用可能なものを「可」として評価した。シール材として特に適していると評価する条件は、空隙率が20%未満であることとした。
(B) Test method The porosity was calculated by measuring the volume after filling a 200 cc container.
Samples that were particularly suitable as sealing materials were evaluated as “good” and those that could be used were evaluated as “good” based on the test results. The condition to be evaluated as being particularly suitable as a sealing material was that the porosity was less than 20%.

(c)結果
表4は、試料11〜15についての空隙率の測定結果と、シール材としての評価を示す表である。消泡剤が全く含まれていない試料11では、気泡が除去されず、空隙率が20%以上に上昇したため、施工の際に十分な止水性能を確保できない可能性があり、「可」と評価された。

Figure 2015172108
(C) Result Table 4 is a table | surface which shows the measurement result of the porosity about the samples 11-15, and evaluation as a sealing material. In the sample 11 containing no antifoaming agent, bubbles were not removed, and the porosity increased to 20% or more. Therefore, there is a possibility that sufficient water-stopping performance may not be ensured during construction. It was evaluated.
Figure 2015172108

表4の結果から消泡剤の含有率は、出来上がり量に対して少なくとも0.3%以上であることが望ましいことがわかった。   From the results in Table 4, it was found that the content of the antifoaming agent is preferably at least 0.3% or more with respect to the finished amount.

(3)酢酸ビニル系共重合体の含有率
(a)試料
上述したシール素材A,B,Cのうち酢酸ビニル系共重合体の組成を調整して、出来上がり量に対する酢酸ビニル系共重合体の含有率を0,1,2,3,4,5%に変化させて試料16〜33を作成した。ここでシール素材A,B,Cのうち、酢酸ビニル系共重合体以外の成分の比率を変えず、かつ、水100重量部に対するシール素材A,B,Cの添加量が13重量部になるようにした。
(3) Content of vinyl acetate copolymer (a) sample The composition of the vinyl acetate copolymer of the sealing materials A, B, and C described above is adjusted, and the vinyl acetate copolymer relative to the finished amount is adjusted. Samples 16 to 33 were prepared by changing the content ratio to 0, 1, 2, 3, 4, and 5%. Here, the ratio of components other than the vinyl acetate copolymer is not changed among the sealing materials A, B, and C, and the addition amount of the sealing materials A, B, and C with respect to 100 parts by weight of water is 13 parts by weight. I did it.

(b)試験方法
摩擦係数は、重量方向における上下に配置した2枚の板の間に各試料を挟み、上側の板を水平に引っ張り、その上側の板が動き出すときの荷重を、荷重計を用いて測定し、測定された荷重を試料の重量で除算することにより算出した。
試料は、試験の結果によりシール材として特に適しているものを「良」として、使用可能なものを「可」として評価した。シール材として特に適していると評価する条件は、摩擦係数が0.2以下でなく、かつ、0.4以下であることとした。
(B) Test method The coefficient of friction is determined by using a load meter to measure the load when each sample is sandwiched between two plates arranged vertically in the weight direction, the upper plate is pulled horizontally, and the upper plate starts to move. Measured and calculated by dividing the measured load by the weight of the sample.
Samples that were particularly suitable as sealing materials were evaluated as “good” and those that could be used were evaluated as “good” based on the test results. The condition to be evaluated as being particularly suitable as a sealing material was that the friction coefficient was not 0.2 or less and 0.4 or less.

(c)結果
表5は、試料16〜21についての摩擦係数の測定結果と、シール材としての評価を示す表である。酢酸ビニル系共重合体が全く含まれていない試料16,22,28では、摩擦係数が0.4を超えたため、シールド掘削機の掘削方向への移動に支障をきたす可能性があり、「可」と評価された。また、酢酸ビニル系共重合体の含有率が5%の試料21,27,33では、摩擦係数が0.2以下となり、シールド掘削機と地盤との摩擦抵抗がなくなるため、止水性が大きく低下する可能性があり、「可」と評価された。シール素材A,B,Cの違いによる実験結果の差は殆ど見られていない。

Figure 2015172108
(C) Result Table 5 is a table | surface which shows the measurement result of the friction coefficient about the samples 16-21, and evaluation as a sealing material. In Samples 16, 22, and 28 that do not contain any vinyl acetate copolymer, the friction coefficient exceeded 0.4, which could hinder the movement of the shield excavator in the excavation direction. ". Moreover, in the samples 21, 27, and 33 having a vinyl acetate copolymer content of 5%, the friction coefficient is 0.2 or less, and the friction resistance between the shield excavator and the ground disappears, so that the water stoppage is greatly reduced. It was possible, and it was evaluated as “Yes”. There is almost no difference in the experimental results due to the difference in the sealing materials A, B, and C.
Figure 2015172108

表5の結果から酢酸ビニル系共重合体の含有率は、出来上がり量に対して1%以上4%以下であることが望ましいことがわかった。   From the results in Table 5, it was found that the content of the vinyl acetate copolymer is desirably 1% or more and 4% or less with respect to the finished amount.

Claims (6)

水と、
シール素材とを有し、
前記シール素材は、
水溶性のセルロース系増粘剤と、
直径または厚さが0.1ミリメートル以上であり、かつ、長さが0.5ミリメートル以上の繊維状の充填剤と、
酢酸ビニル系共重合体と、
有機系の消泡剤と
を含むことを特徴とするシール材。
water and,
Having a sealing material,
The seal material is
A water-soluble cellulosic thickener;
A fibrous filler having a diameter or thickness of 0.1 millimeters or more and a length of 0.5 millimeters or more;
A vinyl acetate copolymer;
A sealing material comprising an organic antifoaming agent.
前記シール素材は、
前記水100重量部に対して、10.0重量部以上14.0重量部以下の添加量で添加される
ことを特徴とする請求項1に記載のシール材。
The seal material is
The sealing material according to claim 1, wherein the sealing material is added in an amount of 10.0 parts by weight or more and 14.0 parts by weight or less with respect to 100 parts by weight of the water.
前記セルロース系増粘剤は、粉黛状であって水と混合することで水の粘性を上昇させる特性を有する
ことを特徴とする請求項1または2に記載のシール材。
The sealing material according to claim 1 or 2, wherein the cellulosic thickener is powdery and has a characteristic of increasing the viscosity of water when mixed with water.
前記充填剤は、直径または厚さが2ミリメートル以下であり、かつ、長さが30ミリメートル以下である
ことを特徴とする請求項1から3のいずれか1項に記載のシール材。
The sealant according to any one of claims 1 to 3, wherein the filler has a diameter or thickness of 2 millimeters or less and a length of 30 millimeters or less.
前記消泡剤の含有率は、出来上がり量に対して少なくとも0.3%以上である
ことを特徴とする請求項1から4のいずれか1項に記載のシール材。
The sealing material according to any one of claims 1 to 4, wherein a content of the antifoaming agent is at least 0.3% or more with respect to a finished amount.
前記酢酸ビニル系共重合体の含有率は、出来上がり量に対して1%以上4%以下である
ことを特徴とする請求項1から5のいずれか1項に記載のシール材。
The sealing material according to any one of claims 1 to 5, wherein a content of the vinyl acetate copolymer is 1% or more and 4% or less with respect to a finished amount.
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Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5554377A (en) * 1978-10-02 1980-04-21 Debitsudo Ii Roozu Sealant composition
JPS59193948A (en) * 1983-04-20 1984-11-02 Kowa Kasei Kk Coating liquid for forming insulation buffering layer on inner wall of tunnel
JPS6314998A (en) * 1986-07-07 1988-01-22 三井建設株式会社 Method of constructing secondary lining in method of shield construction
JPH02167997A (en) * 1988-12-21 1990-06-28 Jdc Corp Filler for sealing tall of shielding excavator
JPH08134378A (en) * 1994-11-10 1996-05-28 Suzuka Fine Kk Coating material for surface preparation, coating material for finishing and coating material for surface preparation and finishing
JPH08199183A (en) * 1995-01-23 1996-08-06 Nippon Oil Co Ltd Grease composition
JPH1095922A (en) * 1996-09-24 1998-04-14 Daicel Chem Ind Ltd Aqueous emulsion composition and its production
JPH11200786A (en) * 1998-01-09 1999-07-27 Kajima Corp Sealing material for tail, etc., and sealing raw material and shield tunneling method and injection system
JP2000256647A (en) * 1999-03-08 2000-09-19 Tachibana Material Co Ltd Tail sealing filling material
JP2004300435A (en) * 2003-03-20 2004-10-28 Sk Kaken Co Ltd Aqueous coating material
JP2009507968A (en) * 2005-09-14 2009-02-26 ナショナル スターチ アンド ケミカル インベストメント ホールディング コーポレイション New water-based adhesives for industrial applications
JP2010090664A (en) * 2008-10-10 2010-04-22 West Japan Railway Co Filling method for tunnel cavity and filler composition

Patent Citations (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS5554377A (en) * 1978-10-02 1980-04-21 Debitsudo Ii Roozu Sealant composition
JPS59193948A (en) * 1983-04-20 1984-11-02 Kowa Kasei Kk Coating liquid for forming insulation buffering layer on inner wall of tunnel
JPS6314998A (en) * 1986-07-07 1988-01-22 三井建設株式会社 Method of constructing secondary lining in method of shield construction
JPH02167997A (en) * 1988-12-21 1990-06-28 Jdc Corp Filler for sealing tall of shielding excavator
JPH08134378A (en) * 1994-11-10 1996-05-28 Suzuka Fine Kk Coating material for surface preparation, coating material for finishing and coating material for surface preparation and finishing
JPH08199183A (en) * 1995-01-23 1996-08-06 Nippon Oil Co Ltd Grease composition
JPH1095922A (en) * 1996-09-24 1998-04-14 Daicel Chem Ind Ltd Aqueous emulsion composition and its production
JPH11200786A (en) * 1998-01-09 1999-07-27 Kajima Corp Sealing material for tail, etc., and sealing raw material and shield tunneling method and injection system
JP2000256647A (en) * 1999-03-08 2000-09-19 Tachibana Material Co Ltd Tail sealing filling material
JP2004300435A (en) * 2003-03-20 2004-10-28 Sk Kaken Co Ltd Aqueous coating material
JP2009507968A (en) * 2005-09-14 2009-02-26 ナショナル スターチ アンド ケミカル インベストメント ホールディング コーポレイション New water-based adhesives for industrial applications
JP2010090664A (en) * 2008-10-10 2010-04-22 West Japan Railway Co Filling method for tunnel cavity and filler composition

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