WO2005021932A1 - 気泡シールド工法における気泡の生成方法及び気泡シールド工法に用いられる気泡材 - Google Patents

気泡シールド工法における気泡の生成方法及び気泡シールド工法に用いられる気泡材 Download PDF

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Publication number
WO2005021932A1
WO2005021932A1 PCT/JP2004/012883 JP2004012883W WO2005021932A1 WO 2005021932 A1 WO2005021932 A1 WO 2005021932A1 JP 2004012883 W JP2004012883 W JP 2004012883W WO 2005021932 A1 WO2005021932 A1 WO 2005021932A1
Authority
WO
WIPO (PCT)
Prior art keywords
viscosity
solution
foam
foaming
foamed material
Prior art date
Application number
PCT/JP2004/012883
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
Keizo Miki
Yoichi Moriya
Masayoshi Izawa
Original Assignee
Obayashi Corporation
Keihin Soil Corporation
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by Obayashi Corporation, Keihin Soil Corporation filed Critical Obayashi Corporation
Publication of WO2005021932A1 publication Critical patent/WO2005021932A1/ja

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Classifications

    • C—CHEMISTRY; METALLURGY
    • C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
    • C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
    • C09K8/00—Compositions for drilling of boreholes or wells; Compositions for treating boreholes or wells, e.g. for completion or for remedial operations
    • C09K8/02—Well-drilling compositions
    • C09K8/38—Gaseous or foamed well-drilling compositions
    • 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

Definitions

  • the present invention relates to a method of generating bubbles suitable for bubble shield method, particularly for sand with high water permeability.
  • Additives used in mud pressure shields are (a) bentonite type, (b) cell opening type, (c) polyacrylamide type, (d) water absorbing resin type, (e) ) It is classified into surfactant group.
  • the foaming agent used in the bubble shielding method generally belongs to (e) surfactant system, and special foaming agent (OK-2: main ingredient of foaming material made of cellulose polymer using pulp as a raw material) ) Is produced by mixing air into the aqueous solution of By injecting this foam material into the face, the fluidity and water resistance of the excavated soil can be improved, and adhesion of the soil in the chamber 1 can be prevented, and smooth excavation can be performed while securing the stability of the face. be able to.
  • the type of air bubble material is determined from the properties of the ground being excavated, that is, the particle size accumulation curve (Bubble shield method technical data “Selection criteria for soil quality and special air bubble material”, March 1995) , Shield method construction technology published, http: ⁇ w. Shield- meth od. Gr. Jp / what / kiho. Refer to the PDF), for example, as shown in Figure 1, A type (solution viscosity: 2.7 m P) The applicable range of a ⁇ s) is I zone consisting of clay, silt, fine sand, etc. Alternatively, the application range of type B (solution viscosity 30 0 m Pa s) is suitable for the ⁇ to ⁇ zone consisting of fine sand, coarse sand, etc., while it is the range of zone II.
  • a type solution viscosity: 2.7 m P
  • the applicable range of a ⁇ s) is I zone consisting of clay, silt, fine sand, etc.
  • the thickener is added to O K-1 to add viscosity to the air bubbles, and the cell strength is increased.
  • the thickener is added to O K-1 to add viscosity to the air bubbles, and the cell strength is increased.
  • the thickener is added to O K-1 to add viscosity to the air bubbles, and the cell strength is increased.
  • soil with a high water permeability coefficient that belongs to zone IV even if using a weir type, air bubbles are likely to be defoamed by the discharge of abundant groundwater, making it difficult to keep the face stable.
  • problems such as development from the screw conveyor occurred, causing problems in digging.
  • the expansion ratio will decrease due to pressure buildup in the foaming device due to the viscosity, clogging, etc., and it will not be possible to foam 6 times the standard of cocoon type of bubble shield. is there.
  • the present invention solves the above-mentioned problems, and by using a cocoon-type foam material to secure a desired expansion ratio and then further thickening it, it is possible to use it even in a highly permeable sandy ground.
  • Another object of the present invention is to provide a method of generating air bubbles in an air bubble shielding method and an air bubble material used in an air bubble shielding method, which enables the air bubble shielding method to be carried out without using an auxiliary method.
  • the method for producing foam according to the present invention one or a mixture of CMC, gua gum and alginic acid is added as a thickener to a foam material as a main agent, and the viscosity is 300 It is characterized in that the foaming agent solution adjusted to ⁇ ⁇ 500 m Pa s is foamed at a predetermined foaming ratio through a foaming device, and an aqueous solution of metal ion is added to and mixed with the cells obtained immediately thereafter. Do. Also, the method of the present invention is characterized in that The genus ion is characterized in that it is a trivalent metal ion or calcium ion. Furthermore, the method of the present invention is characterized in that in the metal ion, an auxiliary agent for liquid property adjustment is added.
  • the foam material used in the foam shielding method according to the present invention is a foam material as the main agent, to which one or a mixture of CMC, guar gum and alginic acid is added as a thickener.
  • the foam material solution adjusted to a viscosity of 300 to 500 111? 3 ⁇ s is foamed at a predetermined foaming ratio through a foaming device, and is obtained immediately after that.
  • FIG. 1 is a graph showing the selection criteria of soil quality and foam material.
  • FIG. 2 is an explanatory sectional view showing a bubble shielding method to which the method of the present invention is applied.
  • BEST MODE FOR CARRYING OUT THE INVENTION FIG. 2 shows a bubble shield method to which the method of the present invention is applied.
  • 1 is a shield excavator and 2 is a tunnel segment constructed following the excavator 1.
  • the shield drilling machine 1 has a cutter disk 4 on the front of a cylindrical skin plate 3 and receives reaction force on the front end of the segment 2 by jacks (not shown) to move the face by rotating the force cutter disk 4.
  • Excavate carry the excavated slice taken into the chamber 16 which is located on the back of the force cutter disk 4 and separated by the partition 5 by the screw conveyor 7, deliver it to the scrape conveyance truck arranged at the rear part, and remove the soil. It is configured as follows.
  • a feed rail 8 is constructed, and in the present embodiment, various carriages constituting the bubble generation plant are connected in a row on the rail 8.
  • Each truck consists of a foam material storage truck 9, a drive truck 10, a control truck 11 and a foam truck 12 in this order from the rear side.
  • metal foam is placed on the foam truck 12
  • Storage tank 13 is arranged.
  • the storage carriage 9 temporarily receives the foam material supplied from the foam material pipe 14 drawn into the well and stores it there.
  • Drive truck 10 is equipped with foam injection pump 15 and air compressor 16;
  • Control truck 1 1 is equipped with control device 17 of pump 15 and compressor 16;
  • Foam truck 12 has foaming device 1 Eight are provided, and each is connected via a foam supply line and an air line.
  • the foam material stored in the storage carriage 9 is sent to the foaming device 18 by the pump 15 and the pressure air generated by the air compressor 16 in the foaming device 18 is at a predetermined pressure ratio. By mixing, it foams at a predetermined foaming ratio and is discharged to the front surface of the cutter disc 4 through the bubble injection pipe 19.
  • the bubble injection tube 19 is connected to the metal ion storage tank 13 via the supply pipe 20 and the pump P in the vicinity of the discharge end of the foaming device 18, and the bubbles formed in the foaming device 18
  • the metal ion solution is mixed into the The mixing ratio becomes a predetermined ratio by driving and controlling the pump P by the control device 17.
  • the foaming material used is a B-type foaming material that conforms to the above-mentioned ⁇ to ⁇ non, and the main component is added to the above-mentioned ⁇ -1 which is the main component of the foaming material, It is a foaming agent solution adjusted to a viscosity of 300 to 500 m Pa ⁇ s by adding one or a mixture of one or more selected from CMC, guar gum and alginic acid as a thickener.
  • the metal ions to be mixed include aluminum compounds such as alum and sulfate, iron sulfate, iron chloride, sodium aluminate, sodium hydroxide, borax, solutions of trivalent metal ions such as boric acid, and calcium chloride solution. .
  • auxiliaries for liquid adjustment such as sodium hydroxide aqueous solution and sulfuric acid aqueous solution are also mixed in advance in the metal ion solution. This is because the degree of thickening varies depending on the liquid, for example, in the case of gua gum, the degree of thickening is increased on the alkali side, and in the case of C M C, the degree of thickening is increased on the acid side.
  • these metal ion solutions be mixed in the form of a 0.5% to 10% aqueous solution at a mixing ratio of about 5% to 10% by volume ratio to the stock solution of the foam material solution.
  • the reason for this is that when the mixing amount is 5%, the increase in viscosity due to the target gelation is not remarkable, and when it exceeds 10%, volumetric contraction such as separation of water occurs by aggregation. This is because there is a problem that sound bubbles can not be generated.
  • the present invention is suitable for excavating sand permeable ground having high permeability in a bubble shield construction method.
  • the metal ion solution due to the addition of the metal ion solution, the main component of the air bubbles discharged through the foaming device is gelled and discharged from the tip of the drilling machine in a sticky state while being maintained at the desired expansion ratio.
  • a metal ion to be used a trivalent metal ion or calcium ion is desirable.
  • the liquid property adjusting aid By the addition of the liquid property adjusting aid, the viscosity can be maintained easily and the liquid property can be maintained.

Landscapes

  • Engineering & Computer Science (AREA)
  • Chemical & Material Sciences (AREA)
  • Life Sciences & Earth Sciences (AREA)
  • Mining & Mineral Resources (AREA)
  • General Life Sciences & Earth Sciences (AREA)
  • General Chemical & Material Sciences (AREA)
  • Environmental & Geological Engineering (AREA)
  • Chemical Kinetics & Catalysis (AREA)
  • Geochemistry & Mineralogy (AREA)
  • Geology (AREA)
  • Materials Engineering (AREA)
  • Organic Chemistry (AREA)
  • Excavating Of Shafts Or Tunnels (AREA)
  • Soil Conditioners And Soil-Stabilizing Materials (AREA)
PCT/JP2004/012883 2003-08-29 2004-08-30 気泡シールド工法における気泡の生成方法及び気泡シールド工法に用いられる気泡材 WO2005021932A1 (ja)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003-307983 2003-08-29
JP2003307983A JP3994076B2 (ja) 2003-08-29 2003-08-29 気泡シールド工法における気泡の生成方法及び気泡シールド工法に用いられる気泡材

Publications (1)

Publication Number Publication Date
WO2005021932A1 true WO2005021932A1 (ja) 2005-03-10

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PCT/JP2004/012883 WO2005021932A1 (ja) 2003-08-29 2004-08-30 気泡シールド工法における気泡の生成方法及び気泡シールド工法に用いられる気泡材

Country Status (3)

Country Link
JP (1) JP3994076B2 (zh)
CN (1) CN100549363C (zh)
WO (1) WO2005021932A1 (zh)

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017153449A1 (en) 2016-03-09 2017-09-14 Lamberti Spa Method of boring through subterranean formations

Families Citing this family (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP4759397B2 (ja) * 2005-05-18 2011-08-31 株式会社大林組 気泡シールド工法における掘削土の消泡方法及び消泡材
CN102635363B (zh) * 2012-04-23 2015-01-07 武汉船用机械有限责任公司 用于盾构机的添加剂注入口、添加剂注入装置及盾构机
JP6155010B2 (ja) * 2012-11-07 2017-06-28 株式会社大林組 砂礫地盤の掘削に適した気泡シールド工法
CN103305207A (zh) * 2013-06-06 2013-09-18 上海贵通新材料科技有限公司 一种新型环保的油气田开采用压裂液
ITUB20159216A1 (it) * 2015-12-21 2017-06-21 Mapei Spa Additivo schiumogeno per il condizionamento del terreno in presenza di scavo meccanizzato per la realizzazione di gallerie
JP6416426B1 (ja) * 2018-05-10 2018-10-31 テクニカ合同株式会社 気泡混合土砂の改質処理方法

Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6183798A (ja) * 1984-09-28 1986-04-28 株式会社熊谷組 シ−ルド式トンネル掘進方法
DE19717899A1 (de) * 1996-12-09 1998-06-10 Wolff Walsrode Ag Verfahren zur Herstellung sowie Verwendung von Gelen als Additive für einen mechanischen Schildvortrieb

Family Cites Families (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2849041B2 (ja) * 1994-06-30 1999-01-20 ザ、プロクター、エンド、ギャンブル、カンパニー 洗剤組成物
DE19530077A1 (de) * 1995-08-16 1997-02-20 Wolff Walsrode Ag Zubereitungen aus nicht-ionischen und ionischen Hydrokolloiden und deren Verwendung als Hilfsmittel für den Tunnelbau
CN1162367C (zh) * 2002-12-26 2004-08-18 北京城建集团有限责任公司 盾构隧道壁后注浆惰性浆液

Patent Citations (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS6183798A (ja) * 1984-09-28 1986-04-28 株式会社熊谷組 シ−ルド式トンネル掘進方法
DE19717899A1 (de) * 1996-12-09 1998-06-10 Wolff Walsrode Ag Verfahren zur Herstellung sowie Verwendung von Gelen als Additive für einen mechanischen Schildvortrieb

Cited By (1)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2017153449A1 (en) 2016-03-09 2017-09-14 Lamberti Spa Method of boring through subterranean formations

Also Published As

Publication number Publication date
JP2005076285A (ja) 2005-03-24
CN1882762A (zh) 2006-12-20
CN100549363C (zh) 2009-10-14
JP3994076B2 (ja) 2007-10-17

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