| 申请日期 | 2025-07-08 | 申请号 | CA2517420 |
| 公开（公告）号 | CA2517420C | 公开（公告）日 | 2011-11-29 |
| 公开国别 | CA | 申请人省市代码 | 全国 |
| 申请人 | CONSTRUCTION RESEARCH TECHNOLOGY GMBH | ||
| 简介 | 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. | ||
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