Method and composition for injection at a tunnel boring machine

Details Method and composition for injection at a tunnel boring machine Method and composition for injection at a tunnel boring machine

C - Chemistry, Metallurgy

09

K

C09K 8/38 (2006.01) C09K 8/12 (2006.01) E21B 21/00 (2006.01) E21D 9/00 (2006.01)

Patent

CA 2517420

A method of boring a tunnel by means of an earth pressure balance tunnel boring machine, comprising the injection at the cutting head of a foamed aqueous solution and an aqueous solution of a water-soluble acrylic acid-based polymer. The method allows easier tunnel boring in soft, sticky soils.

La présente invention concerne un procédé pour creuser une galerie au moyen d'une machine à creuser une galerie à équilibrage de poussée des terres. Ce procédé consiste à injecter au niveau de la tête d'abattage une solution aqueuse en mousse et une solution aqueuse d'un polymère à base d'acide acrylique hydrosoluble. Ce procédé permet de creuser des galeries dans des sols meubles et visqueux.

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