JPS6219212A - Treatment of excavated earth and sand - Google Patents
Treatment of excavated earth and sandInfo
- Publication number
- JPS6219212A JPS6219212A JP60156107A JP15610785A JPS6219212A JP S6219212 A JPS6219212 A JP S6219212A JP 60156107 A JP60156107 A JP 60156107A JP 15610785 A JP15610785 A JP 15610785A JP S6219212 A JPS6219212 A JP S6219212A
- Authority
- JP
- Japan
- Prior art keywords
- sand
- foaming agent
- earth
- agent
- excavated
- 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
- 239000004576 sand Substances 0.000 title claims abstract description 25
- 239000004088 foaming agent Substances 0.000 claims abstract description 41
- 102000004190 Enzymes Human genes 0.000 claims abstract description 25
- 108090000790 Enzymes Proteins 0.000 claims abstract description 25
- 102000004169 proteins and genes Human genes 0.000 claims abstract description 9
- 108090000623 proteins and genes Proteins 0.000 claims abstract description 9
- 102000004882 Lipase Human genes 0.000 claims abstract description 7
- 108090001060 Lipase Proteins 0.000 claims abstract description 7
- 239000004367 Lipase Substances 0.000 claims abstract description 7
- 235000019421 lipase Nutrition 0.000 claims abstract description 7
- 235000014113 dietary fatty acids Nutrition 0.000 claims abstract description 6
- 229930195729 fatty acid Natural products 0.000 claims abstract description 6
- 239000000194 fatty acid Substances 0.000 claims abstract description 6
- 108091005804 Peptidases Proteins 0.000 claims abstract description 5
- 239000004365 Protease Substances 0.000 claims abstract description 5
- 102100037486 Reverse transcriptase/ribonuclease H Human genes 0.000 claims abstract description 5
- 235000021355 Stearic acid Nutrition 0.000 claims abstract description 5
- 150000004665 fatty acids Chemical class 0.000 claims abstract description 5
- OQCDKBAXFALNLD-UHFFFAOYSA-N octadecanoic acid Natural products CCCCCCCC(C)CCCCCCCCC(O)=O OQCDKBAXFALNLD-UHFFFAOYSA-N 0.000 claims abstract description 5
- 239000008117 stearic acid Substances 0.000 claims abstract description 5
- QIQXTHQIDYTFRH-UHFFFAOYSA-N octadecanoic acid Chemical compound CCCCCCCCCCCCCCCCCC(O)=O QIQXTHQIDYTFRH-UHFFFAOYSA-N 0.000 claims abstract description 4
- 239000002689 soil Substances 0.000 claims description 31
- 238000005192 partition Methods 0.000 claims description 17
- 238000000034 method Methods 0.000 claims description 14
- 239000002518 antifoaming agent Substances 0.000 abstract description 25
- 238000009412 basement excavation Methods 0.000 abstract description 10
- 239000007788 liquid Substances 0.000 abstract description 7
- 239000003795 chemical substances by application Substances 0.000 abstract description 2
- 238000007599 discharging Methods 0.000 abstract 2
- 230000003301 hydrolyzing effect Effects 0.000 abstract 1
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 5
- 150000001413 amino acids Chemical class 0.000 description 3
- -1 polyoxy Polymers 0.000 description 3
- 238000003756 stirring Methods 0.000 description 3
- 239000000126 substance Substances 0.000 description 3
- QGZKDVFQNNGYKY-UHFFFAOYSA-N Ammonia Chemical compound N QGZKDVFQNNGYKY-UHFFFAOYSA-N 0.000 description 2
- 241000894006 Bacteria Species 0.000 description 2
- CURLTUGMZLYLDI-UHFFFAOYSA-N Carbon dioxide Chemical compound O=C=O CURLTUGMZLYLDI-UHFFFAOYSA-N 0.000 description 2
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 description 2
- JPNZKPRONVOMLL-UHFFFAOYSA-N azane;octadecanoic acid Chemical compound [NH4+].CCCCCCCCCCCCCCCCCC([O-])=O JPNZKPRONVOMLL-UHFFFAOYSA-N 0.000 description 2
- 239000006260 foam Substances 0.000 description 2
- 239000002994 raw material Substances 0.000 description 2
- 239000007921 spray Substances 0.000 description 2
- QGZKDVFQNNGYKY-UHFFFAOYSA-O Ammonium Chemical compound [NH4+] QGZKDVFQNNGYKY-UHFFFAOYSA-O 0.000 description 1
- 239000013543 active substance Substances 0.000 description 1
- 229910021529 ammonia Inorganic materials 0.000 description 1
- 229940088990 ammonium stearate Drugs 0.000 description 1
- 235000015278 beef Nutrition 0.000 description 1
- 229910002092 carbon dioxide Inorganic materials 0.000 description 1
- 239000001569 carbon dioxide Substances 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 230000006378 damage Effects 0.000 description 1
- 238000000354 decomposition reaction Methods 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 239000006185 dispersion Substances 0.000 description 1
- 238000005553 drilling Methods 0.000 description 1
- 230000000694 effects Effects 0.000 description 1
- 235000019441 ethanol Nutrition 0.000 description 1
- 230000005484 gravity Effects 0.000 description 1
- 210000000003 hoof Anatomy 0.000 description 1
- 239000002075 main ingredient Substances 0.000 description 1
- 239000000203 mixture Substances 0.000 description 1
- 230000007935 neutral effect Effects 0.000 description 1
- 239000000843 powder Substances 0.000 description 1
- 238000003672 processing method Methods 0.000 description 1
- 239000007787 solid Substances 0.000 description 1
- 238000005507 spraying Methods 0.000 description 1
- 239000004094 surface-active agent Substances 0.000 description 1
- 239000003760 tallow Substances 0.000 description 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B38/00—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof
- C04B38/10—Porous mortars, concrete, artificial stone or ceramic ware; Preparation thereof by using foaming agents or by using mechanical means, e.g. adding preformed foam
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/0642—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining the shield having means for additional processing at the front end
- E21D9/0678—Adding additives, e.g. chemical compositions, to the slurry or the cuttings
- E21D9/0685—Foaming agents
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/06—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining
- E21D9/08—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield
- E21D9/0875—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket
- E21D9/0879—Making by using a driving shield, i.e. advanced by pushing means bearing against the already placed lining with additional boring or cutting means other than the conventional cutting edge of the shield with a movable support arm carrying cutting tools for attacking the front face, e.g. a bucket the shield being provided with devices for lining the tunnel, e.g. shuttering
-
- E—FIXED CONSTRUCTIONS
- E21—EARTH OR ROCK DRILLING; MINING
- E21D—SHAFTS; TUNNELS; GALLERIES; LARGE UNDERGROUND CHAMBERS
- E21D9/00—Tunnels or galleries, with or without linings; Methods or apparatus for making thereof; Layout of tunnels or galleries
- E21D9/12—Devices for removing or hauling away excavated material or spoil; Working or loading platforms
- E21D9/124—Helical conveying means therefor
-
- C—CHEMISTRY; METALLURGY
- C04—CEMENTS; CONCRETE; ARTIFICIAL STONE; CERAMICS; REFRACTORIES
- C04B—LIME, MAGNESIA; SLAG; CEMENTS; COMPOSITIONS THEREOF, e.g. MORTARS, CONCRETE OR LIKE BUILDING MATERIALS; ARTIFICIAL STONE; CERAMICS; REFRACTORIES; TREATMENT OF NATURAL STONE
- C04B2103/00—Function or property of ingredients for mortars, concrete or artificial stone
- C04B2103/0001—Living organisms, e.g. microorganisms, or enzymes
Landscapes
- Engineering & Computer Science (AREA)
- Mining & Mineral Resources (AREA)
- Geochemistry & Mineralogy (AREA)
- Geology (AREA)
- Environmental & Geological Engineering (AREA)
- Chemical & Material Sciences (AREA)
- Life Sciences & Earth Sciences (AREA)
- General Life Sciences & Earth Sciences (AREA)
- Ceramic Engineering (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Materials Engineering (AREA)
- Structural Engineering (AREA)
- Organic Chemistry (AREA)
- Excavating Of Shafts Or Tunnels (AREA)
- Degasification And Air Bubble Elimination (AREA)
- Emulsifying, Dispersing, Foam-Producing Or Wetting Agents (AREA)
Abstract
Description
【発明の詳細な説明】
（技術分野）
シールドトンネル掘進工法における掘削土砂の処理方法
に関し、特にシールド本体の隔壁前方で掘削土砂に気泡
を付与し、該掘削土砂を前記隔壁の前方から後方へ排出
し、前記隔壁後方に排出された掘削土砂の気泡を消去す
る掘削土砂の処理方法に関する。Detailed Description of the Invention (Technical Field) Regarding a method for treating excavated soil in a shield tunnel excavation method, in particular, air bubbles are added to excavated soil in front of a partition wall of a shield body, and the excavated soil is discharged from the front of the partition wall to the rear. The present invention also relates to a method for treating excavated soil that eliminates air bubbles in the excavated soil discharged behind the partition wall.
（従来技術）
シールドトンネル掘進工法の１つに、切羽地盤のロータ
リカッタの切削抵抗の軽減または掘削土砂に対する流動
性および市水性の付与のために、シールド本体の隔壁前
方に起泡剤を供給して地盤または掘削土砂に気泡を付与
し、ロータリカッタまたは攪拌装置の作動に伴なって気
泡が混入した掘削土砂を、隔壁前方の加圧域の圧力降下
による切羽の崩壊を生じることがないように考慮しつつ
、隔壁後方の大気圧域へ連続的または断続的に排出する
掘削工法がある。(Prior art) One of the shield tunnel excavation methods involves supplying a foaming agent to the front of the bulkhead of the shield body in order to reduce the cutting resistance of the rotary cutter on the face ground or to impart fluidity and wetability to the excavated soil. air bubbles are added to the ground or excavated soil to prevent the face from collapsing due to pressure drop in the pressurized area in front of the bulkhead. With consideration, there is an excavation method that discharges water continuously or intermittently into the atmospheric pressure area behind the bulkhead.
このような掘削工法における気泡入り掘削土砂は、従来
、気泡を消去することなく、そのまま士捨場に搬入され
、捨てられていた。このため、土捨場に堆積された掘削
土砂には、その中に気泡が封じ込まれて残存する。この
ように、堆積された掘削土砂に気泡が残存すると、地盤
が気泡入り土砂により軟弱になり、また気泡入り土砂が
雨水と共に河川、湖沼に流出する欠点がある。Conventionally, excavated soil containing air bubbles in such excavation methods has been directly transported to a dumping ground and discarded without removing the air bubbles. For this reason, the excavated soil deposited in the soil dumping site remains with air bubbles trapped therein. As described above, if air bubbles remain in the excavated soil that has been deposited, the ground becomes soft due to the air bubbles, and the air bubbles also flow out into rivers, lakes, and marshes together with rainwater.
このような欠点を除去する処理方法の１つに。One of the processing methods to eliminate such defects.
隔壁後方に排出された気泡入り掘削土砂に消泡剤を添加
し、該土砂を攪拌混合することにより、土砂内の気泡を
消去する方法がある。しかし、この処理方法は、起泡剤
として非イオン活性剤のポリオキシ化合物、スルホン化
合物のような空気連行剤を用い、消泡剤としてエチルア
ルコールのような界面活性剤を用いることにより、掘削
土砂内の気泡を消去するため、気泡は消去されても起泡
剤および消泡剤が分解されることなく土砂に残存し、該
起泡剤または消泡剤が雨水と共に河川、湖沼に流出し、
自然破壊のような公害を発生する問題力゛・ある。There is a method of eliminating air bubbles in the earth and sand by adding an antifoaming agent to the aerated excavated earth and sand discharged behind the partition wall and stirring and mixing the earth and sand. However, this treatment method uses an air entraining agent such as a nonionic active agent such as a polyoxy compound or a sulfone compound as a foaming agent, and a surfactant such as ethyl alcohol as an antifoaming agent. Even if the bubbles are removed, the foaming agent and antifoaming agent remain in the soil without being decomposed, and the foaming agent or antifoaming agent flows into rivers, lakes and marshes along with rainwater.
There are problems that cause pollution such as destruction of nature.
（発明の目的） 本発明は、気泡を確実に消去することができ。(Purpose of the invention) The present invention can reliably eliminate air bubbles.
また起泡剤および消泡剤により公害を発生するおそれの
ない掘削土砂の処理方法を提供することを目的とする。Another object of the present invention is to provide a method for treating excavated soil that does not cause pollution due to the use of foaming agents and antifoaming agents.
（発明の構成）
本発明の掘削土砂の処理方法は、酵素により分解可能の
起泡剤により生起された気泡をシールド本体の隔壁前方
に供給して掘削土砂に前記気泡を付与し、該掘削土砂を
前記隔壁後方に排出し、前記起泡剤を分解する前記酵素
を前記隔壁の後方に排出された掘削土砂に加えて前記起
泡剤を分解させる。(Structure of the Invention) The method for treating excavated soil of the present invention includes supplying air bubbles generated by a foaming agent decomposable by enzymes to the front of the partition wall of the shield main body to impart the air bubbles to the excavated earth and sand. is discharged behind the partition wall, and the enzyme that decomposes the foaming agent is added to the excavated soil discharged behind the partition wall to decompose the foaming agent.
前記起泡剤としては、加水分解蛋白類またはステアリン
酸系の脂肪酸を用いることができる。また、酵素として
は、起泡剤が加水分解蛋白類であればプロテアーゼ、ま
た起泡剤がステアリン酸系の脂肪酸であればリパーゼを
用いることができる。As the foaming agent, hydrolyzed proteins or stearic acid-based fatty acids can be used. Further, as the enzyme, protease can be used if the foaming agent is a hydrolyzed protein, and lipase can be used if the foaming agent is a stearic acid fatty acid.
（発明の効果）
本発明によれば、起泡剤として酵素により分解可能のも
のを用い、かつ消泡剤として前記起泡剤を分解可能の酵
素を用いるため、前記起泡剤が前記酵素により分解され
て気泡が確実に消去される。また、酵素自体が無害な物
質であり、かっ起泡剤が酵素により無害な物質に分解さ
れるため、起泡剤および消泡剤により公害を発生するこ
とがない。(Effects of the Invention) According to the present invention, since a foaming agent that can be decomposed by an enzyme is used and an enzyme that can decompose the foaming agent is used as an antifoaming agent, the foaming agent can be decomposed by the enzyme. Decomposition ensures that air bubbles are eliminated. Furthermore, since the enzyme itself is a harmless substance and the foaming agent is decomposed into harmless substances by the enzyme, the foaming agent and antifoaming agent do not cause any pollution.
（実施例） 以下、図面に示す本発明の実施例について説明する。(Example) Embodiments of the present invention shown in the drawings will be described below.
図に示すシールドトンネル掘進装置１０は、±圧シール
ド掘進機であり、筒状のシールド本体１２と、該本体を
前進させる複数のジヤツキ１４とを含む、ジヤツキ１４
は、トンネルの掘進に伴なって本体１２の後方に配置さ
れるセグメント１６に反力を得る１本体１２内には隔壁
１８が設けられ、該隔壁により本体１２内は隔壁前方の
圧力域２０と、隔壁後方の大気圧域２２とに分離されて
いる。The shield tunnel excavation device 10 shown in the figure is a ±pressure shield excavation machine, and includes a cylindrical shield main body 12 and a plurality of jacks 14 for advancing the main body.
A partition wall 18 is provided inside the main body 12 to obtain a reaction force from a segment 16 arranged at the rear of the main body 12 as the tunnel is excavated. , and an atmospheric pressure region 22 behind the partition wall.
隔壁１８には、カッタヘッド２４が回転可能に支持され
ている。カッタヘッド２４は、駆動機構２６により回転
されて切羽２８を掘削する。カッタヘッド２４により掘
削された土砂は、土砂排出機３０により圧力域２０から
大気圧域２２に排出される。A cutter head 24 is rotatably supported by the partition wall 18 . The cutter head 24 is rotated by a drive mechanism 26 to excavate a face 28 . The earth and sand excavated by the cutter head 24 is discharged from the pressure area 20 to the atmospheric pressure area 22 by the earth and sand discharger 30.
土砂排出機３０は、図示の例ではスクリューコンベア３
２と、これを駆動する駆動機構３４とを備え、圧力域２
０の圧力降下による切羽２８の崩壊を生じない速度で掘
削土砂を排出し、これを排出口３６からベルトコンベア
３８上に放出する。In the illustrated example, the earth and sand discharger 30 is a screw conveyor 3.
2 and a drive mechanism 34 for driving the pressure area 2.
The excavated soil is discharged at a speed that does not cause collapse of the face 28 due to a pressure drop of 0, and is discharged from the discharge port 36 onto the belt conveyor 38.
ベルトコンベア３８に放出された掘削土砂は、ベルトコ
ンベア３８によりさらに後方へ搬送され、該ベルトコン
ベア３８からずリトロのような他の運搬機により地上に
搬送される。The excavated earth and sand discharged onto the belt conveyor 38 is further conveyed to the rear by the belt conveyor 38, and is conveyed to the ground by another conveyor such as a RITRO instead of the belt conveyor 38.
掘進装置１０は、また、隔壁１８の前方へ気泡を供給す
る気泡添加機４０と、隔壁１８の後方へ排出された掘削
土砂に消泡剤を添加する消泡剤添加機４２とを備える。The excavation device 10 also includes a bubble adding machine 40 that supplies bubbles to the front of the partition wall 18, and an antifoaming agent adding machine 42 that adds a defoaming agent to the excavated soil discharged to the rear of the partition wall 18.
また、カッタヘッド２４は４気泡供給用の穴４４と、該
穴に供給された気泡を切羽に向けて噴出する複数の噴出
口４６と、掘削土砂を攪拌して該掘削土砂に流動性を付
与する攪拌羽根４８とを有する。The cutter head 24 also has four air bubble supply holes 44, a plurality of spout ports 46 for ejecting the air bubbles supplied to the holes toward the face, and agitates the excavated earth and sand to impart fluidity to the excavated earth. It has a stirring blade 48.
気泡添加機４０は、起泡剤を収納するタンク４９と、該
タンクからパイプ５１を経て圧縮空気路
え、≠泡Ｊｊ１５０において生起した気泡を送給管５２
を経て圧力域２０およびカッタヘッド２４の穴４４を経
て切羽２８に供給する。The bubble adding machine 40 includes a tank 49 that stores a foaming agent, a compressed air path from the tank via a pipe 51, and a feed pipe 52 for passing the bubbles generated in the foam Jj150.
through the pressure region 20 and the hole 44 in the cutter head 24 to the face 28.
消泡剤添加＠４２は、消泡剤を収納するタンク５４と、
消泡剤を散布する散布機５６とを備え。The defoaming agent addition @42 includes a tank 54 that stores the defoaming agent,
It is equipped with a sprayer 56 that sprays an antifoaming agent.
タンク５４内の消泡剤をパイプ５８を経て散布機５６に
供給する。散布機５６は、ベルトコンベア３８の搬送終
端部の上方に配置されており、ベルトコンベア３８によ
り搬送される掘削土砂に消泡剤を散布する。消泡剤は、
隔壁の後方へ排出された掘削土砂に供給すればよいから
、土砂排出機３０による排出途中の掘削土砂、ベルトコ
ンベア３８またはずリトロのような他の搬送装置による
地上への搬送途中の掘削土砂、地上に搬送した掘削土砂
のいずれに添加してもよい。The antifoaming agent in the tank 54 is supplied to the sprayer 56 via a pipe 58. The spreader 56 is disposed above the conveyance end portion of the belt conveyor 38 and sprays an antifoaming agent onto the excavated soil conveyed by the belt conveyor 38. The antifoaming agent is
Since it is sufficient to supply the excavated earth and sand discharged to the rear of the partition wall, the excavated earth and sand that is being discharged by the earth and sand discharger 30, the excavated earth and sand that is being conveyed to the ground by the belt conveyor 38 or other conveyance device such as a Zuzuretro, It may be added to any of the excavated soil transported to the ground.
タンク４９に収納されている起泡剤は、加水分解蛋白類
、ステアリン酸系の脂肪酸のように、酵素により分解可
能のものである。水溶性の起泡剤は水に溶解されて収納
タンク４９に収納されており、非水溶性の起泡剤は水に
分散されてタンク４９に収納されている。The foaming agent stored in the tank 49 is one that can be decomposed by enzymes, such as hydrolyzed proteins and stearic acid-based fatty acids. The water-soluble foaming agent is dissolved in water and stored in the storage tank 49, and the water-insoluble foaming agent is dispersed in water and stored in the storage tank 49.
タンク５４に収納されている消泡剤は、プロテアーゼ、
リパーゼのように、前記の起泡剤を分解する酵素である
。これらの消泡剤は、水溶性であるため水に溶解されて
タンク５４に収納されている。The antifoaming agents stored in the tank 54 include protease,
Like lipase, it is an enzyme that breaks down the foaming agent mentioned above. Since these antifoaming agents are water-soluble, they are dissolved in water and stored in the tank 54.
掘削時、掘削装置１０は、前記起泡剤を含む液体により
生起された気泡を気泡添加機４０から圧力域２０および
切羽２８に供給しつつカッタヘッド２４により切羽２８
を掘削する。このため、掘削土砂は、カッタヘッド２４
の回転に伴って攪拌羽根４８が回転することにより攪拌
され、前記気泡を付与される。
Ｃ気泡を付与された掘削土砂は、土砂排出機
３０により圧力域２０から大気圧域２２に排出され。During excavation, the drilling equipment 10 supplies bubbles generated by the liquid containing the foaming agent to the pressure region 20 and the face 28 from the bubble adding machine 40, and the cutter head 24 supplies the bubbles generated by the liquid containing the foaming agent to the face 28.
excavate. Therefore, the excavated earth and sand are removed from the cutter head 24.
As the stirring blade 48 rotates, the mixture is stirred and the air bubbles are added.
The excavated soil to which C bubbles have been added is discharged from the pressure region 20 to the atmospheric pressure region 22 by the soil ejector 30.
ベルトコンベア３８によりさらに後方へ搬送される。The belt conveyor 38 further conveys it to the rear.
ベルトコンベア３８により搬送される掘削土砂には、消
泡剤としての前記酵素を含む液体が消泡剤散布機４２に
より散布される。これにより掘削土砂内の起泡剤が酵素
により分解されるため、掘削土砂内の気泡は消去される
。A liquid containing the enzyme as an antifoaming agent is sprayed onto the excavated earth and sand conveyed by the belt conveyor 38 by an antifoaming agent sprayer 42 . As a result, the foaming agent in the excavated soil is decomposed by the enzyme, so that the air bubbles in the excavated soil are eliminated.
起泡剤としての加水分解蛋白類には、商品名［チルフォ
ーマ−５５］ （株式会社デルナイト製）がある、この
チルフォーマ−５５は水溶性であり、またその性状は次
の通りである。Hydrolyzed proteins as a foaming agent include the trade name [Chillformer-55] (manufactured by Delnight Co., Ltd.). Chillformer-55 is water-soluble and its properties are as follows.
主成分：動物性加水分解蛋白質
（原料は牛の蹄角粉）
外 観：黒褐色の液体
比 重：１．１６
ｐＨ：中性
チルフォーマ−５５を分解する酵素としては、商品名「
ビオブラーゼ」、「ブナプシン」 （長瀬産業株式会社
製）がある、これらは水溶性であり、また主成分がプロ
テアーゼである。Main ingredient: Animal hydrolyzed protein (raw material is cow hoof horn powder) Appearance: Blackish brown liquid Specific gravity: 1.16 pH: Neutral The enzyme that decomposes Chillformer-55 has the product name “
biobrase" and "bunapsin" (manufactured by Nagase Sangyo Co., Ltd.), which are water-soluble and have protease as their main component.
チルフォーマ−５５により気泡を付与した掘削土砂に前
記の酵素を散布すると、起泡剤は、蛋白質が酵素により
分解されてアミノ酸に変化し、アミノ酸は、さらに、掘
削土砂中の細菌により分解されてアンモニア、水、炭酸
ガスになる。また、掘削土砂中の気泡は、蛋白質が酵素
により分解されてアミノ酸に変化する過程で、気泡の表
面積が大きくなり、消泡する。When the above-mentioned enzyme is sprayed on the excavated soil to which air bubbles have been added using Chillformer-55, the protein in the foaming agent is decomposed by the enzyme and converted into amino acids, and the amino acid is further decomposed by bacteria in the excavated soil to form ammonia. , water, becomes carbon dioxide gas. In addition, air bubbles in excavated soil become defoamed as the surface area of the air bubbles increases during the process in which proteins are decomposed by enzymes and converted into amino acids.
起泡剤としての脂肪酸には、商品名「ノプコＤＣ−１０
０−ＡＪ （サンノプコ株式会社製）がある、このノ
プコＤＣ−１００−Ａは、アンモニウムステアレート水
分散液であり、またその性状は次の通りである。For the fatty acid as a foaming agent, use the product name “Nopco DC-10”.
0-AJ (manufactured by San Nopco Co., Ltd.), Nopco DC-100-A is an aqueous ammonium stearate dispersion, and its properties are as follows.
主成分ニステアリン酸アンモニウム
（原料は牛脂）
外 観：白色液状
固形分＝３３％
粘 度：５０ｃＰｓ（２５度Ｃ）
ノプコＤＣ−１００−Ａを分解する酵素としては、商品
名「リパーゼＡＰＪ、「リパーゼＭ−ＡＰＪ （天野
製薬株式会社製）がある、これらは水溶性であり、また
主成分がリパーゼである。Main component: ammonium nistearate (raw material is beef tallow) Appearance: White liquid Solid content = 33% Viscosity: 50 cPs (25 degrees C) There is Lipase M-APJ (manufactured by Amano Pharmaceutical Co., Ltd.), which is water-soluble and whose main component is lipase.
ノプコＤＣ−１００−Ａにより気泡を付与した掘削土砂
に前記の酵素を散布すると、リパーゼはアンモニアステ
アレートを分解し、気泡をなくす。When the enzyme is sprayed on excavated soil to which air bubbles have been added using Nopco DC-100-A, the lipase decomposes ammonia stearate and eliminates air bubbles.
上記のような起泡剤および酵素を用いると、掘削土砂中
の気泡を確実に消去することができ、また起泡剤が酵素
および掘削土砂中の細菌により無害な物質に分解される
ため、起泡剤および消泡剤により公害を発生することが
ない。By using the above-mentioned foaming agent and enzyme, air bubbles in the excavated soil can be reliably eliminated, and the foaming agent is decomposed into harmless substances by the enzyme and bacteria in the excavated soil. Foaming agents and antifoaming agents do not cause pollution.
図は本発明を実施する掘進装置の一実施例を示す断面図
である。
１２：シールド本体、 ２０：隔壁、２４：カッタヘ
ッド、 ４０：気泡添加機、４２：消泡剤散布機。The figure is a sectional view showing an embodiment of an excavation device implementing the present invention. 12: Shield main body, 20: Partition wall, 24: Cutter head, 40: Foam adding machine, 42: Antifoaming agent spraying machine.
Claims (3)
泡をシールド本体の隔壁前方に供給して掘削土砂に前記
気泡を付与し、該掘削土砂を前記隔壁後方に排出し、前
記起泡剤を分解する前記酵素を前記隔壁の後方に排出さ
れた掘削土砂に加えて前記起泡剤を分解させる、掘削土
砂の処理方法。(1) Bubbles generated by a foaming agent that can be decomposed by enzymes are supplied to the front of the partition wall of the shield main body to impart the air bubbles to the excavated soil, the excavated soil is discharged behind the partition wall, and the foaming agent A method for treating excavated earth and sand, in which the enzyme that decomposes the foaming agent is added to the excavated earth discharged behind the partition wall to decompose the foaming agent.
はプロテアーゼである、特許請求の範囲第（１）項に記
載の掘削土砂の処理方法。(2) The method for treating excavated earth and sand according to claim (1), wherein the foaming agent is a hydrolyzed protein and the enzyme is a protease.
記酵素はリパーゼである、特許請求の範囲第（１）項に
記載の掘削土砂の処理方法。(3) The method for treating excavated earth and sand according to claim (1), wherein the foaming agent is a stearic acid-based fatty acid, and the enzyme is lipase.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60156107A JPS6219212A (en) | 1985-07-17 | 1985-07-17 | Treatment of excavated earth and sand |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP60156107A JPS6219212A (en) | 1985-07-17 | 1985-07-17 | Treatment of excavated earth and sand |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6219212A true JPS6219212A (en) | 1987-01-28 |
| JPH0218886B2 JPH0218886B2 (en) | 1990-04-27 |
Family
ID=15620461
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP60156107A Granted JPS6219212A (en) | 1985-07-17 | 1985-07-17 | Treatment of excavated earth and sand |
Country Status (1)
| Country | Link |
|---|---|
| JP (1) | JPS6219212A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2694045A1 (en) * | 1992-07-22 | 1994-01-28 | Sogea | Method, equipment and device for generating and injecting foam for tunneling. |
Families Citing this family (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2768104B2 (en) * | 1992-01-23 | 1998-06-25 | 株式会社大林組 | Mechanical shield excavation method using foaming agent |
| DE19530077A1 (en) * | 1995-08-16 | 1997-02-20 | Wolff Walsrode Ag | Preparations from non-ionic and ionic hydrocolloids and their use as auxiliary materials for tunnel construction |
-
1985
- 1985-07-17 JP JP60156107A patent/JPS6219212A/en active Granted
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2694045A1 (en) * | 1992-07-22 | 1994-01-28 | Sogea | Method, equipment and device for generating and injecting foam for tunneling. |
Also Published As
| Publication number | Publication date |
|---|---|
| JPH0218886B2 (en) | 1990-04-27 |
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