JPWO2016063899A1 - Setting retarder for tail seal of shield machine - Google Patents
Setting retarder for tail seal of shield machine Download PDFInfo
- Publication number
- JPWO2016063899A1 JPWO2016063899A1 JP2016555247A JP2016555247A JPWO2016063899A1 JP WO2016063899 A1 JPWO2016063899 A1 JP WO2016063899A1 JP 2016555247 A JP2016555247 A JP 2016555247A JP 2016555247 A JP2016555247 A JP 2016555247A JP WO2016063899 A1 JPWO2016063899 A1 JP WO2016063899A1
- Authority
- JP
- Japan
- Prior art keywords
- shield machine
- mass
- tail seal
- oil
- seal composition
- 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
Links
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Classifications
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D11/00—Lining tunnels, galleries or other underground cavities, e.g. large underground chambers; Linings therefor; Making such linings in situ, e.g. by assembling
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Architecture (AREA)
- Civil Engineering (AREA)
- Structural Engineering (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Lining And Supports For Tunnels (AREA)
Abstract
裏込剤がブラシシール部に浸入してきても、ブラシシールとセグメントが固着しないシールド掘進機用テールシール組成物のための凝結遅延剤およびこの凝結遅延剤を添加した同テールシール組成物を提供する。潤滑油基油、増ちょう剤および繊維質を含有するシールド掘進機のテールシール組成物用添加剤であって、水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物から選択された１種以上からなるか、もしくは前記有機化合物から選択された１種以上を含むシールド掘進機のテールシール用凝結遅延剤、並びに[A] 潤滑油基油１５〜６０質量％、[B] 増ちょう剤３５〜７５質量％、[C] 繊維質０.５〜１５質量％、および[D] 水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物から選択された１種以上の化合物０.１〜１０質量％を含有するシールド掘進機用テールシール組成物。Provided is a setting retarder for a tail seal composition for a shield machine and the tail seal composition to which the setting retarder is added, in which a brush seal and a segment do not stick even when a back-filling agent has entered the brush seal portion. . An additive for a tail seal composition of a shield machine containing a lubricating base oil, a thickener and a fiber, one selected from organic compounds having two or more hydroxyl groups or hydroxyl groups and carboxyl groups Condensation retarder for tail seal of shield machine including one or more selected from the above organic compounds, and [A] 15-60 mass% of lubricating base oil, [B] thickener 35 ~ 75 mass%, [C] fiber 0.5 to 15 mass%, and [D] one or more compounds selected from organic compounds having two or more hydroxyl groups or a hydroxyl group and a carboxyl group 0.1 to 0.1 mass A tail seal composition for a shield machine containing 10% by mass.
Description
本発明は、シールド掘進機のテールシール用凝結遅延剤およびこれを添加したシールド掘進機用テールシール組成物に関する。 The present invention relates to a setting retarder for a tail seal of a shield machine and a tail seal composition for a shield machine to which this is added.
シールド掘進機により、地中にトンネルを掘削する場合、進行方向の地山を掘削しながら、シールド掘進機は前進し、シールド掘進機の後方には、順次、トンネルの内壁となるセグメントが組み上げられている。この場合、掘削されるトンネルの外径（掘削開孔径）は、シールド掘進機の外径となるが、セグメントはシールド掘進機内部で組み上げられるため、セグメントの外径はシールド掘進機の内径以下となる。このため、シールド掘進機の後方ではトンネル外径とセグメント外径との間に隙間が生じ、この隙間には、シールド掘進機の前進にともない、裏込剤が充填される。
一方、シールド掘進機の後端で、未だ裏込剤が充填されていないトンネル内の空隙へは、地下水等が浸みだしており、この地下水のシールド掘進機内への浸入を防ぐため、シールド掘進機の末端にはシールド掘進機内のセグメントの外周とシールド掘進機の内周の間を止水するブラシシールが複数列、シールド掘進機の内周に設けられている。そして、その止水性を維持するために、これらのブラシシールの間にテールシール組成物が充填されている（例えば、特許文献１参照）。When excavating a tunnel into the ground with a shield machine, the shield machine advances while excavating ground in the direction of travel, and segments behind the shield machine are sequentially assembled as the inner wall of the tunnel. ing. In this case, the outer diameter of the tunnel to be excavated (excavation opening diameter) is the outer diameter of the shield machine, but since the segment is assembled inside the shield machine, the outer diameter of the segment is less than the inner diameter of the shield machine. Become. For this reason, a gap is formed between the outer diameter of the tunnel and the outer diameter of the segment behind the shield machine, and this gap is filled with a backing agent as the shield machine advances.
On the other hand, in the tunnel at the rear end of the shield machine that has not yet been filled with the backfilling agent, groundwater and the like have infiltrated, and in order to prevent this groundwater from entering the shield machine, the shield machine A plurality of rows of brush seals for stopping water between the outer circumference of the segment in the shield machine and the inner circumference of the shield machine are provided on the inner circumference of the shield machine. And in order to maintain the water stop, a tail seal composition is filled between these brush seals (see, for example, Patent Document 1).
このテールシール組成物としては、鉱油系、合成系の潤滑油基油に、増ちょう剤としての鱗片状、その他無機充填剤、有機粉末、繊維質等を混合したものが用いられている（特許文献１〜４参照）。
ところで、裏込剤は充填当初は流動性が高く、その後固化するため、流動性の高い裏込剤がシールドマシン後端のブラシシール部に浸入し、ブラシシールとセグメントが固着して、シールドマシンの前進が困難となったり、セグメントの強度によっては、セグメントが破壊されるという問題があった。このため、裏込剤がブラシシール部に浸入してきても、ブラシシールとセグメントが固着しない方法が求められていた。As this tail seal composition, a mixture of mineral oil-based or synthetic-based lubricating base oil and scale-like thickener, other inorganic fillers, organic powder, fiber, etc. is used (patent) References 1-4).
By the way, since the backing agent has high fluidity at the beginning of filling and then solidifies, the backing agent with high fluidity penetrates into the brush seal part at the rear end of the shield machine, the brush seal and the segment are fixed, and the shield machine It is difficult to move forward, and depending on the strength of the segment, the segment is destroyed. For this reason, there has been a demand for a method in which the brush seal and the segment do not adhere even if the backing agent enters the brush seal portion.
本発明は、上記問題点を解決するもので、裏込剤がブラシシール部に浸入してきても、ブラシシールとセグメントが固着しないシールド掘進機用テールシール組成物のための凝結遅延剤およびこの凝結遅延剤を添加した同テールシール組成物を提供するものである。 The present invention solves the above-mentioned problems, and a setting retarder for a tail seal composition for a shield machine in which a brush seal and a segment do not adhere even if a back-filling agent has entered the brush seal portion, and the setting agent. The tail seal composition to which a retarder is added is provided.
本発明者らは上記課題を解決するために鋭意研究を進めた結果、驚くべきことに、繊維質などを含有するテールシール組成物に特定構造の有機化合物を添加することにより、凝結遅延剤が非水系の組成物中に存在しているにもかかわらず、裏込剤の浸入によるブラシシールとセグメントの固着を抑制できることを見出した。 As a result of carrying out diligent research to solve the above problems, the present inventors have surprisingly found that a set retarder can be obtained by adding an organic compound having a specific structure to a tail seal composition containing a fiber or the like. It has been found that the sticking of the brush seal and the segment due to the penetration of the back-filling agent can be suppressed despite being present in the non-aqueous composition.
本発明は、かかる知見に基づきなされたもので、次の通りである。
（１）潤滑油基油、増ちょう剤および繊維質を含有するシールド掘進機のテールシール組成物用添加剤であって、水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物から選択された１種以上からなるか、もしくは前記有機化合物から選択された１種以上を含むシールド掘進機のテールシール用凝結遅延剤。
（２）シールド掘進機のテールシール組成物に対して、前記組成物全量基準で、水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物から選択された１種以上を合計量として、０.１〜１０質量％添加される上記（１）に記載の凝結遅延剤。
（３）[A] 潤滑油基油１５〜６０質量％、[B] 増ちょう剤３５〜７５質量％、[C] 繊維質０.５〜１５質量％、および、[D] 水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物から選択された１種以上の化合物０.１〜１０質量％を含有するシールド掘進機用テールシール組成物。The present invention has been made based on such findings and is as follows.
(1) An additive for a tail seal composition of a shield machine containing a lubricant base oil, a thickener and a fiber, wherein the additive is selected from two or more hydroxyl groups or an organic compound having a hydroxyl group and a carboxyl group. A setting retarder for tail seals of shield machine, comprising at least one selected from the group consisting of organic compounds.
(2) For the tail seal composition of a shield machine, based on the total amount of the composition, 0 or more selected from organic compounds having two or more hydroxyl groups or hydroxyl groups and carboxyl groups as a total amount The setting retarder according to (1), which is added in an amount of 1 to 10% by mass.
(3) [A] Lubricating base oil 15-60 mass%, [B] Thickener 35-75 mass%, [C] Fiber 0.5-15 mass%, and [D] Two hydroxyl groups The tail seal composition for shield machine which contains 0.1-10 mass% of 1 or more types of compounds selected from the above or the organic compound which has a hydroxyl group and a carboxyl group.
本発明の凝結遅延剤は、潤滑油基油、増ちょう剤、繊維質を配合したテールシール組成物に添加することにより、裏込剤が混入した場合でも、裏込剤の硬化、凝結を遅らすことができ、ブラシシールとセグメントとの固着を抑制できるという格別の効果を奏する。
また、本発明のシールド掘進機用テールシール組成物は、裏込剤が混入した場合でも、裏込剤の硬化、凝結を遅らし、ブラシシールとセグメントとの固着を抑制でき、シールド掘進機による掘削を効率良く行うことができるという格別の効果を奏する。The setting retarder of the present invention is added to a tail seal composition containing a lubricant base oil, a thickener, and a fiber, thereby delaying the curing and setting of the backing agent even when the backing agent is mixed. It is possible to obtain a special effect that the sticking between the brush seal and the segment can be suppressed.
Further, the tail seal composition for a shield machine according to the present invention can delay the hardening and setting of the back agent and suppress the adhesion between the brush seal and the segment even when the back agent is mixed. There is an exceptional effect that excavation can be performed efficiently.
本発明の凝結遅延剤は、テールシール組成物中に混入した裏込剤の凝結時間を遅延させるものであり、水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物を有効成分とする。この種の化合物は、水酸基やカルボキシル基がセメントと結びついてセメントの水和を遅らせることが考えられるが、この種の化合物は、非水系のテールシール組成物中に配合されていても凝結遅延効果を発揮することが分かった。
本発明の水酸基を２個以上有する有機化合物としては、糖類、多価アルコール等があるが、糖類としては、ブドウ糖などの単糖類、シュクロース（白糖、グラニュー糖）などの二糖類やこれらを含む糖蜜、あるいはグルコースやマルトースなどを含むでんぷん分解生成物等が好ましい。一方、多価アルコールとしては、脂肪族多価アルコールが好ましく、その炭素数としては２〜１８、特には３〜６がより好ましい。２価〜４価のアルコール、特には３価のアルコールが好ましい。
また、水酸基およびカルボキシル基を有する有機化合物としては、オキシカルボン酸などが挙げられ、グルコン酸、クエン酸、酒石酸、リンゴ酸などが好ましい。
これらの有機化合物は、単独で用いても、二種類以上を混合して用いても良い。The setting retarder of the present invention delays the setting time of the backing agent mixed in the tail seal composition, and contains two or more hydroxyl groups or an organic compound having a hydroxyl group and a carboxyl group as an active ingredient. This type of compound is thought to delay the hydration of the cement due to the bonding of hydroxyl and carboxyl groups to the cement, but this type of compound is effective in retarding the setting even if incorporated in a non-aqueous tail seal composition. It was found that
Examples of the organic compound having two or more hydroxyl groups of the present invention include saccharides and polyhydric alcohols. Examples of the saccharide include monosaccharides such as glucose, disaccharides such as sucrose (white sugar, granulated sugar), and the like. Molasses or starch decomposition products containing glucose or maltose are preferred. On the other hand, the polyhydric alcohol is preferably an aliphatic polyhydric alcohol, and the carbon number thereof is preferably 2 to 18, particularly 3 to 6. Divalent to tetravalent alcohols, particularly trivalent alcohols are preferred.
Examples of the organic compound having a hydroxyl group and a carboxyl group include oxycarboxylic acid, and gluconic acid, citric acid, tartaric acid, malic acid, and the like are preferable.
These organic compounds may be used alone or in combination of two or more.
本発明の凝結遅延剤は、上記有機化合物、そのままを凝結遅延剤としても良く、また、この有機化合物を有機溶媒等に溶解又は分散させたものであっても良い。この場合、有機溶媒としては、テールシール組成物中の潤滑油基油と相溶性を有する各種の炭化水素溶媒であれば特に支障はなく、テールシールに用いられる潤滑油基油を溶媒として用いることがより好ましい。この凝結遅延剤中の上記有機化合物の含有量は、添加の効率上、５０質量％以上が好ましく、有機化合物をそのまま凝結遅延剤とすることがより好ましい。
なお、この凝結遅延剤には、上記有機化合物以外に、必要に応じて、一般に潤滑油やグリースなどに用いられている、清浄剤、分散剤、摩耗防止剤、酸化防止剤、さび止め剤、腐食防止剤などを適宜添加することができる。The setting retarder of the present invention may be the above organic compound as it is, and may be a set retarder, or may be a solution or dispersion of this organic compound in an organic solvent or the like. In this case, the organic solvent is not particularly limited as long as it is a variety of hydrocarbon solvents compatible with the lubricating base oil in the tail seal composition, and the lubricating base oil used for the tail seal is used as the solvent. Is more preferable. The content of the organic compound in the setting retarder is preferably 50% by mass or more from the viewpoint of the addition efficiency, and it is more preferable to use the organic compound as it is as the setting retarder.
In addition to the above organic compounds, this set retarder is generally used as a lubricant, grease, etc., as necessary, detergents, dispersants, antiwear agents, antioxidants, rust inhibitors, Corrosion inhibitors and the like can be added as appropriate.
本発明の凝結遅延剤は、潤滑油基油、増ちょう剤、繊維質を含有するシールド掘進機用テールシール組成物に添加される。この添加量は、テールシール組成物全量基準で、上記有機化合物の合計量として、０.１〜１０質量％になるように添加することが好ましく、糖類、オキシカルボン酸については、０.５〜５質量％とすることがより好ましく、多価アルコールについては、２〜１０質量％がより好ましい。 The setting retarder of the present invention is added to a tail seal composition for a shield machine containing a lubricant base oil, a thickener and a fiber. The addition amount is preferably 0.1 to 10% by mass as the total amount of the organic compound based on the total amount of the tail seal composition, and 0.5 to 0.5 for saccharides and oxycarboxylic acids. It is more preferable to set it as 5 mass%, and about 2-10 mass% is more preferable about a polyhydric alcohol.
本発明のシールド掘進機用テールシール組成物は、潤滑油基油１５〜６０質量％、増ちょう剤３５〜７５質量％、繊維質２〜１５質量％、および水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物から選択された１種以上の化合物０.５〜１０質量％を含有するものであるが、この組成物は、圧送の容易性、止水性、水分混入時の安定性、高温時での油保持力のため、１５℃における密度が１.１〜１.８ｇ／ｃｍ３のものが好ましく、１.１〜１.５ｇ／ｃｍ３がより好ましく、１.１〜１.４ｇ／ｃｍ３がさらに好ましい。また、同様の理由により、不混和ちょう度が１５０〜３５０のものが好ましく、２２０〜２８０がより好ましい。なお、本発明にいう不混和ちょう度の測定は、ＪＩＳ Ｋ２２２０に準拠する方法による。
さらに、本発明のシールド掘進機用テールシール組成物は実質的に水分を含まないものが好ましい。実質的に水分を含まないとは、不可避的に混入する水分を排除するものではないことを意味するが、水分含有量としては、テールシール組成物全量基準で、好ましくは、５質量％以下、より好ましくは、１質量％以下である。The tail seal composition for a shield machine according to the present invention comprises a lubricating base oil 15 to 60% by mass, a thickener 35 to 75% by mass, a fiber 2 to 15% by mass, and two or more hydroxyl groups, or a hydroxyl group and The composition contains 0.5 to 10% by mass of one or more compounds selected from organic compounds having a carboxyl group. This composition is easy to pump, water-stopping, stable when mixed with water, for oil retention at high temperatures, preferably those density is 1.1~1.8g / cm 3 at 15 ° C., more preferably 1.1~1.5g / cm 3, 1.1~1. 4 g / cm 3 is more preferable. For the same reason, those having an immiscibility consistency of 150 to 350 are preferred, and 220 to 280 is more preferred. In addition, the measurement of the immiscible penetration referred to in the present invention is based on a method based on JIS K2220.
Furthermore, it is preferable that the tail seal composition for a shield machine of the present invention is substantially free of moisture. The fact that it does not substantially contain water means that it does not exclude water inevitably mixed in, but the water content is preferably 5% by mass or less based on the total amount of the tail seal composition, More preferably, it is 1 mass% or less.
[A] 潤滑油基油
本発明の潤滑油基油は、通常の潤滑油に用いられる潤滑油基油であれば、鉱油系、合成油系、動植物油系あるいはこれらの混合物のいずれも用いることができる。
この潤滑油基油の物性としては、４０℃における動粘度が１００〜３０００ｍｍ２／ｓ、特には５５０〜１５００ｍｍ２／ｓのものが好ましい。さらに、流動点は０℃以下が好ましく、安全性の観点から、引火点は１５０℃以上が好ましい。
この潤滑油基油の含有量は組成物全量基準で１５〜６０質量％であるが、好ましくは、２５〜５５質量％、より好ましくは、３５〜５５質量％である。 [A] Lubricating oil base oil The lubricating oil base oil of the present invention may be any of a mineral oil base, a synthetic oil base, an animal or vegetable oil base, or a mixture thereof as long as it is a lubricating base oil used in ordinary lubricating oils. Can do.
The physical properties of the lubricating base oil, kinematic viscosity at 40 ℃ is 100~3000mm 2 / s, particularly preferably from 550~1500mm 2 / s. Further, the pour point is preferably 0 ° C. or lower, and the flash point is preferably 150 ° C. or higher from the viewpoint of safety.
The content of the lubricating base oil is 15 to 60% by mass based on the total amount of the composition, but is preferably 25 to 55% by mass, and more preferably 35 to 55% by mass.
鉱油系潤滑油基油は、一般に、原油を常圧蒸留し、あるいはさらに、この蒸留残渣油を減圧蒸留して得られる留出油を各種の精製プロセスで精製した潤滑油留分を基油とし、これをそのまま、或いはこれに各種の添加剤等を調合して調製される。前記精製プロセスは、水素化精製、溶剤抽出、溶剤脱ろう、水素化脱ろう、硫酸洗浄、白土処理などであり、これらを適宜の順序で組み合わせて処理して、本発明に好適な鉱油系の潤滑油基油を得ることができる。異なる原油あるいは留出油を、異なるプロセスの組合せ、順序により得られた、性状の異なる複数の精製油の混合物も好適な基油として用いることができる。
この鉱油系潤滑油基油は、取り扱いの安全上の観点から芳香族分が２０％以下のものが好ましい。Mineral oil base oils are generally based on lubricating oil fractions obtained by distilling crude oil at atmospheric pressure or further distilling distillate oil obtained by distillation under reduced pressure through various refining processes. It can be prepared as it is or by blending various additives. The refining process includes hydrorefining, solvent extraction, solvent dewaxing, hydrodewaxing, sulfuric acid washing, clay treatment, etc., and these are combined in an appropriate order for treatment to obtain a mineral oil system suitable for the present invention. A lubricating base oil can be obtained. A mixture of a plurality of refined oils having different properties obtained by using different crude oils or distillate oils in different process combinations and sequences can also be used as a suitable base oil.
This mineral oil base oil preferably has an aromatic content of 20% or less from the viewpoint of handling safety.
合成油系潤滑油基油は、例えば、ポリ‐α‐オレフィン（ＰＡＯ）、低分子量エチレン・α‐オレフィン共重合体、ポリブテンやポリイソブテンなどの高分子ポリマー、シリコーン油、脂肪酸エステル、フッ素化油、アルキルナフタレンなどを単独であるいは組み合わせて基油として用いることができる。 Synthetic oil base oils include, for example, poly-α-olefin (PAO), low molecular weight ethylene / α-olefin copolymers, polymer polymers such as polybutene and polyisobutene, silicone oils, fatty acid esters, fluorinated oils, Alkylnaphthalene and the like can be used alone or in combination as a base oil.
動植物油系の潤滑油基油としては、牛乳脂、牛脂、ラード(豚脂)、羊脂、鯨油、鮭油、かつお油、にしん油、鱈油、さらには大豆油、菜種油、ひまわり油、サフラワー油、落花生油、とうもろこし油、綿実油、米ぬか油、ゴマ油、オリーブ油、アマニ油、ヒマシ油、カカオ脂、パーム油、ヤシ油、麻実油、米油、茶種油などを好適に用いることができる。 Animal and vegetable oil-based lubricating base oils include milk fat, beef tallow, lard (pig tallow), sheep fat, whale oil, coconut oil, bonito oil, herring oil, coconut oil, and soybean oil, rapeseed oil, sunflower oil, Saflower oil, peanut oil, corn oil, cottonseed oil, rice bran oil, sesame oil, olive oil, flaxseed oil, castor oil, cacao butter, palm oil, coconut oil, hemp seed oil, rice oil, tea seed oil, etc. it can.
[B] 増ちょう剤
本発明の増ちょう剤としては、テールシール組成物の止水性を向上させるために、無機粉体を用いることが好ましい。この場合の無機粉体は、珪素、アルミニウム、マグネシウム、カルシウム等の酸化物、水酸化物、炭酸塩、硫酸塩等の粉体を挙げることができ、さらにこれらの混合物、及び、天然に産するこれらの化合物を主成分とする鉱石の粉体等も用いることができる。具体的には、炭酸カルシウム、タルク、炭酸カルシウム、炭酸マグネシウム、硫酸カルシウム、水酸化アルミニウム、酸化マグネシウム、酸化カルシウム、酸化アルミニウム、シリカ、ベントナイト、珪藻土などの粉体が好適である。これらの無機粉体は、一種類でも複数の種類を混合して用いてもよい。
上記無機粉体は、平均粒径が０.５〜５００μｍのものが好ましく、５〜５０μｍのものがより好ましい。 [B] Thickener As the thickener of the present invention, it is preferable to use an inorganic powder in order to improve the water-stopping property of the tail seal composition. Examples of the inorganic powder in this case include oxides such as silicon, aluminum, magnesium, and calcium, hydroxides, carbonates, sulfates, and the like, and also a mixture thereof and a natural product. Ore powders containing these compounds as main components can also be used. Specifically, powders such as calcium carbonate, talc, calcium carbonate, magnesium carbonate, calcium sulfate, aluminum hydroxide, magnesium oxide, calcium oxide, aluminum oxide, silica, bentonite, and diatomaceous earth are suitable. These inorganic powders may be used alone or as a mixture of a plurality of types.
The inorganic powder preferably has an average particle size of 0.5 to 500 μm, more preferably 5 to 50 μm.
さらに、テールシール組成物を圧送するのに適したちょう度に調整するために、通常の潤滑剤、グリース等で用いられている増ちょう剤を併用することが好ましい。このグリース等で用いられている増ちょう剤としては金属石けん系、ウレア系、有機ポリマー系等が好適である。
金属石けん系増ちょう剤は、カルボン酸がステアリン酸、アゼライン酸などの脂肪族カルボン酸でも、テレフタル酸などの芳香族カルボン酸でもよく、特には１価または２価の脂肪族カルボン酸で、炭素数６〜２０の脂肪族カルボン酸のものが好ましい。また、金属は、リチウム、ナトリウムなどのアルカリ金属、カルシウムなどのアルカリ土類金属、アルミニウムのような両性金属でもよいが、アルカリ金属、特にはリチウムが好ましい。このようなカルボン酸金属塩は、一種類でも複数の種類を混合して用いてもよい。Furthermore, in order to adjust the tail seal composition to a suitable consistency for pumping, it is preferable to use a thickener used in ordinary lubricants, greases and the like. As the thickener used in this grease and the like, metal soap, urea, organic polymer, and the like are suitable.
In the metal soap thickener, the carboxylic acid may be an aliphatic carboxylic acid such as stearic acid or azelaic acid, or an aromatic carboxylic acid such as terephthalic acid, in particular, a monovalent or divalent aliphatic carboxylic acid, carbon The thing of aliphatic carboxylic acid of several 6-20 is preferable. The metal may be an alkali metal such as lithium or sodium, an alkaline earth metal such as calcium, or an amphoteric metal such as aluminum, but is preferably an alkali metal, particularly lithium. Such carboxylic acid metal salts may be used singly or in combination.
ウレア系増ちょう剤としては、ジイソシアネートとモノアミンとの反応で得られるジウレア化合物やジイソシアネートとモノアミン、ジアミンとの反応で得られるポリウレア化合物等が好適であり、また、有機ポリマー系増ちょう剤としては、ＰＴＦＥ（ポリテトラフルオロエチレン）などが好適である
なお、上記金属石けん系、ウレア系、有機ポリマー系等の増ちょう剤は、単独でも、２種類以上を併用しても良い。As the urea-based thickener, a diurea compound obtained by reaction of diisocyanate and monoamine, a polyurea compound obtained by reaction of diisocyanate and monoamine, diamine, and the like are suitable, and as an organic polymer thickener, PTFE (polytetrafluoroethylene) or the like is suitable. The above-described thickeners such as metal soap, urea, and organic polymer may be used alone or in combination of two or more.
増ちょう剤の含有量は、テールシール組成物全量基準で、合計量として、３５〜７５質量％であるが、無機粉体では、３５〜７５質量％が好ましく、３５〜６０質量％がより好ましい。なお、併用する金属石けん系、ウレア系、有機ポリマー系の増ちょう剤の含有量は、テールシール組成物全量基準で、３５質量％以下が好ましく、０.５〜２０質量％がより好ましい。 The content of the thickener is 35 to 75% by mass as the total amount based on the total amount of the tail seal composition, but 35 to 75% by mass is preferable for the inorganic powder, and 35 to 60% by mass is more preferable. . The content of the metal soap, urea and organic polymer thickeners used in combination is preferably 35% by mass or less, more preferably 0.5 to 20% by mass, based on the total amount of the tail seal composition.
[C] 繊維質
繊維質は、シールド掘進機のテールシール部にある金属網や金属線を束ねたブラシに絡みつき、潤滑油基油、増ちょう剤とともに止水性のある濾布層を形成するために用いられる。
この繊維質としては、天然由来または有機合成された有機繊維質のいずれをも用いることができ、例えば、天然由来の天然繊維としては、セルロース、綿繊維が、合成繊維としては、ポリプロピレン、ポリエステル等が好適である。
この繊維質は、長さが、平均で１０ｍｍ以下のものが好ましく、０.１〜８ｍｍがより好ましく、０.５〜６ｍｍがさらに好ましい。また、その太さは、平均で１０〜１００μｍが好ましく、１５〜９０μｍがより好ましい。
この繊維質の含有量は、テールシール組成物全量基準で、２〜１５質量％であるが、３〜１０質量％が好ましい。 [C] The fibrous fiber is entangled with the metal net and brush bundled with the metal wire in the tail seal part of the shield machine, and forms a filter cloth layer with water-stopper together with lubricant base oil and thickener. Used for.
As the fiber, any of naturally-derived or organically-synthesized organic fibers can be used. For example, naturally-occurring natural fibers include cellulose and cotton fibers, and synthetic fibers include polypropylene and polyester. Is preferred.
This fiber has an average length of preferably 10 mm or less, more preferably 0.1 to 8 mm, and even more preferably 0.5 to 6 mm. The thickness is preferably 10 to 100 μm on average, and more preferably 15 to 90 μm.
The fiber content is 2 to 15% by mass, preferably 3 to 10% by mass, based on the total amount of the tail seal composition.
[D] 有機化合物
本発明の水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物は、凝結遅延剤の有効成分として上述したものと同じである。
この有機化合物の含有量は、テールシール組成物全量基準で、合計量として、０.１〜１０質量％であるが、糖類、オキシカルボン酸では、０.５〜５質量％が好ましく、多価アルコールの場合は、２〜１０質量％が好ましい。 [D] Organic Compound The organic compound having two or more hydroxyl groups or a hydroxyl group and a carboxyl group of the present invention is the same as that described above as the active ingredient of the setting retarder.
The content of the organic compound is 0.1 to 10% by mass as a total amount based on the total amount of the tail seal composition, but is preferably 0.5 to 5% by mass for saccharides and oxycarboxylic acids. In the case of alcohol, 2-10 mass% is preferable.
[E] 他の添加剤
本発明のテールシール組成物には、上記成分以外に、必要に応じて、一般に潤滑油やグリースなどに用いられている、清浄剤、分散剤、摩耗防止剤、酸化防止剤、さび止め剤、腐食防止剤などを適宜添加することができる。特には、さび止め剤として、脂肪酸ポリオールエステルなどを、テールシール組成物全量基準で、０.２〜２質量％添加することが好ましい。 [E] Other Additives In addition to the above components, the tail seal composition of the present invention includes, as necessary, detergents, dispersants, antiwear agents, oxidation agents, which are generally used in lubricating oils and greases. Inhibitors, rust inhibitors, corrosion inhibitors, and the like can be added as appropriate. In particular, it is preferable to add 0.2 to 2% by mass of a fatty acid polyol ester or the like as a rust inhibitor, based on the total amount of the tail seal composition.
次に示す潤滑油基油、増ちょう剤、繊維質、および有機化合物を用いて、表１に示す割合（質量％）で混合してテールシール組成物を調製し、不混和ちょう度を測定した。この結果を表１に示す。
〔テールシール組成物の成分〕
Ａ．潤滑油基油
基油Ａ１：鉱油（ＪＸ日鉱日石エネルギー社製、溶剤精製重質油、１５℃の密度；０.９０ｇ／ｃｍ３）
基油Ａ２：ポリブテン、平均分子量；１５,０００
なお、上記鉱油Ａ１に、ポリブテンＡ２を混合したときの４０℃の動粘度（ｍｍ２／ｓ）を表１に示した。
Ｂ．増ちょう剤
増ちょう剤Ｂ１：タルク、平均粒径；２０μｍ
増ちょう剤Ｂ２：炭酸カルシウム、平均粒径；１０μｍ
増ちょう剤Ｂ３：Ｌｉステアリン酸石けん（関東化学社製試薬）Using the following lubricating base oil, thickener, fiber, and organic compound, a tail seal composition was prepared by mixing at a ratio (mass%) shown in Table 1, and the immiscible consistency was measured. . The results are shown in Table 1.
[Components of tail seal composition]
A. Lubricating base oil Base oil A1: Mineral oil (manufactured by JX Nippon Oil & Energy, solvent refined heavy oil, density at 15 ° C .; 0.90 g / cm 3 )
Base oil A2: polybutene, average molecular weight; 15,000
The kinematic viscosity (mm 2 / s) at 40 ° C. when polybutene A2 was mixed with the mineral oil A1 is shown in Table 1.
B. Thickener Thickener B1: Talc, average particle size; 20 μm
Thickener B2: calcium carbonate, average particle size; 10 μm
Thickener B3: Li stearic acid soap (reagent manufactured by Kanto Chemical Co., Inc.)
Ｃ．繊維質
繊維質Ｃ１：綿繊維、平均長さ；１.８ｍｍ、平均直径；１８μｍ
繊維質Ｃ２：ポリエチレンテレフタレート繊維、平均長さ；５ｍｍ、平均直径；２０μｍ
Ｄ．有機化合物
有機化合物Ｄ１：グラニュー糖（大日本明治製糖(株)社製）
有機化合物Ｄ２：糖蜜（大日本明治製糖(株)社製）
有機化合物Ｄ３：グリセリン（関東化学社製試薬）
有機化合物Ｄ４：ブドウ糖（日本食品化工(株)社製）
有機化合物Ｄ５：オレイルアルコール（関東化学製試薬）
有機化合物Ｄ６：オレイン酸（関東化学製試薬）C. Fiber Fiber C1: Cotton fiber, average length: 1.8 mm, average diameter: 18 μm
Fibrous C2: polyethylene terephthalate fiber, average length: 5 mm, average diameter: 20 μm
D. Organic compound Organic compound D1: Granulated sugar (manufactured by Dainippon Meiji Sugar Co., Ltd.)
Organic compound D2: molasses (manufactured by Dainippon Meiji Sugar Co., Ltd.)
Organic compound D3: Glycerin (Reagent manufactured by Kanto Chemical Co., Inc.)
Organic compound D4: glucose (manufactured by Nippon Shokuhin Kako Co., Ltd.)
Organic compound D5: oleyl alcohol (reagent manufactured by Kanto Chemical)
Organic compound D6: oleic acid (reagent manufactured by Kanto Chemical)
〔テールシール組成物の評価１：止水性〕
次に示す条件で耐水圧試験を行い、流出水の有無を測定した。
底部中央部に、中心間隔５ｍｍで縦横に４列、合計１６個の開口（直径３ｍｍ）開口を有する内径５２ｍｍのステンレス製の圧力容器を用いた。開口上にステンレス製のメッシュ（５０番、厚み０.８５ｍｍ）を載せ、上記で調製したテールシール組成物５０ｇを導入した。テールシール組成物上に水（１０ｇ）を置き、空気で３５ｋｇｆ／ｃｍ２の圧力で５分間加圧し、その際の底部開口からの水の流出有無により止水性の評価を行った。この結果を表１に示した。
この結果、繊維質を含まない比較例３は、止水性がないことが分かる。[Evaluation of Tail Seal Composition 1: Water Resistant]
A water pressure resistance test was performed under the following conditions to measure the presence or absence of effluent water.
A stainless steel pressure vessel having an inner diameter of 52 mm and a total of 16 openings (diameter 3 mm) having a center interval of 5 mm and 4 rows vertically and horizontally was used at the center of the bottom. A stainless steel mesh (No. 50, thickness 0.85 mm) was placed on the opening, and 50 g of the tail seal composition prepared above was introduced. Water (10 g) was placed on the tail seal composition, pressurized with air at a pressure of 35 kgf / cm 2 for 5 minutes, and the water stoppage was evaluated by the presence or absence of water outflow from the bottom opening. The results are shown in Table 1.
As a result, it can be seen that Comparative Example 3 containing no fiber has no water-stopping property.
〔テールシール組成物の評価２：凝固抑制性〕
上記で調製したテールシール組成物１００ｇと、裏込材の主成分である速乾セメント〔トーヨーマテラン製、商品名インスタントセメント（３０分速乾性）〕、水１５ｇを手で混合し、混合直後のちょう度と、３０分後のちょう度の差を測定することで、凝固抑制性を評価した。この結果を表１に示した。
この結果、凝結遅延剤を含有する実施例１〜１０の組成物は、凝結遅延剤を含有しない比較例１、２に比べて、凝固抑制効果を有することが分かる。また、水酸基あるいはカルボキシル基を１個しか有しない化合物は、比較例４、５に示すように凝固抑制効果を示さない。[Evaluation of tail seal composition 2: coagulation inhibition]
100 g of the tail seal composition prepared above, quick-drying cement (manufactured by Toyo Materan, trade name instant cement (30-minute quick-drying)), which is the main component of the backing material, and 15 g of water are mixed by hand and immediately after mixing. The coagulation inhibitory property was evaluated by measuring the difference between the consistency and the consistency after 30 minutes. The results are shown in Table 1.
As a result, it can be seen that the compositions of Examples 1 to 10 containing a setting retarder have a coagulation inhibitory effect compared to Comparative Examples 1 and 2 that do not contain a setting retarder. Further, a compound having only one hydroxyl group or carboxyl group does not exhibit a coagulation inhibiting effect as shown in Comparative Examples 4 and 5.
本発明のテールシール用凝結遅延剤は、テールシール組成物に添加することにより、シールド掘進機テールのブラシシール部に浸入する裏込剤の硬化を遅らすことができるため、シールド掘進機用のテールシール組成物への添加剤として有用である。
また、本発明のテールシール組成物は、裏込剤が混入した場合でも、裏込剤の硬化、凝結を遅らし、ブラシシールとセグメントとの固着を抑制でき、シールド掘進機による掘削を効率良く行うことができるため、シールド掘進機に有用である。By adding the setting retarder for tail seal of the present invention to the tail seal composition, it is possible to delay the curing of the backing agent entering the brush seal portion of the shield machine tail, so that the tail for shield machine is used. Useful as an additive to seal compositions.
In addition, the tail seal composition of the present invention can delay the hardening and setting of the backing agent and suppress the adhesion between the brush seal and the segment even when the backing agent is mixed, and can efficiently excavate with a shield machine. Because it can be done, it is useful for shield machine.
Claims (3)
[B] 増ちょう剤３５〜７５質量％、
[C] 繊維質０.５〜１５質量％、および、
[D] 水酸基を２個以上、または水酸基およびカルボキシル基を有する有機化合物から選択された１種以上の化合物０.１〜１０質量％
を含有するシールド掘進機用テールシール組成物。[A] Lubricating base oil 15 to 60% by mass,
[B] Thickener 35-75% by mass,
[C] 0.5 to 15% by mass of fiber, and
[D] 0.1 to 10% by mass of one or more compounds selected from organic compounds having two or more hydroxyl groups or hydroxyl and carboxyl groups
A tail seal composition for a shield machine containing
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| PCT/JP2015/079674 WO2016063899A1 (en) | 2014-10-24 | 2015-10-21 | Setting retarder for tail seal for shield tunneling machine |
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| JPWO2016063899A1 true JPWO2016063899A1 (en) | 2017-08-03 |
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| WO2020110284A1 (en) * | 2018-11-30 | 2020-06-04 | Ｂａｓｆジャパン株式会社 | Additive for tail seal grease used in shield boring machine, and tail seal grease |
Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01272687A (en) * | 1988-04-26 | 1989-10-31 | Chukyo Kasei Kogyo Kk | Semifluid sealing material |
| JPH02180983A (en) * | 1988-09-30 | 1990-07-13 | Chukyo Kasei Kogyo Kk | Semifluid sealing material |
| JPH05187194A (en) * | 1992-01-09 | 1993-07-27 | Nippon Guriisu Kk | Tail brush seal for shield excavator and water stopping method therewith |
| JP2000281422A (en) * | 1999-03-29 | 2000-10-10 | Sumitomo Osaka Cement Co Ltd | Setting retarder for backfill grouting material, setting retarder liquid for backfill grouting material, backfill grouting material and backfill grouting work |
| JP2002160955A (en) * | 2000-09-18 | 2002-06-04 | Sumitomo Osaka Cement Co Ltd | Setting retarder for back-fill grout, back-fill grout and its grouting method |
| JP2006118239A (en) * | 2004-10-22 | 2006-05-11 | Okumura Corp | Tail seal method for shield machine, and shield machine |
-
2015
- 2015-10-21 JP JP2016555247A patent/JP6622709B2/en active Active
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Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPH01272687A (en) * | 1988-04-26 | 1989-10-31 | Chukyo Kasei Kogyo Kk | Semifluid sealing material |
| JPH02180983A (en) * | 1988-09-30 | 1990-07-13 | Chukyo Kasei Kogyo Kk | Semifluid sealing material |
| JPH05187194A (en) * | 1992-01-09 | 1993-07-27 | Nippon Guriisu Kk | Tail brush seal for shield excavator and water stopping method therewith |
| JP2000281422A (en) * | 1999-03-29 | 2000-10-10 | Sumitomo Osaka Cement Co Ltd | Setting retarder for backfill grouting material, setting retarder liquid for backfill grouting material, backfill grouting material and backfill grouting work |
| JP2002160955A (en) * | 2000-09-18 | 2002-06-04 | Sumitomo Osaka Cement Co Ltd | Setting retarder for back-fill grout, back-fill grout and its grouting method |
| JP2006118239A (en) * | 2004-10-22 | 2006-05-11 | Okumura Corp | Tail seal method for shield machine, and shield machine |
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