Property of flyash surfactant injection into overcutting area as lubricant for slurry pipe jacking

Hideki Shimada, Yasuhiro Yoshida, Takashi Sasaoka, Kikuo Matsui, Shuichi Fujita, Takashi Kawai, Masuhiko Iino

研究成果: Chapter in Book/Report/Conference proceedingConference contribution

抄録

Lubrication can effectively reduce necessary thrust for over-cutting if a discrete layer of the lubricant is maintained between the pipe and the excavated soil. The lubricant must be designed to form a layer in the surrounding soil, be pressurized to overcome underground water pressure and stabilize the over-cutting area. The Lubricant should fill the complete overbreak void to minimize surface settlement. However, it has been clarified that for a commercial lubricant to be effective, it is suggested that ingredients such as sodium and potassium be eliminated. As a result, for a lubricant not to lose its function as a support against the overburdening pressure of an over-cutting area and to enable a reduction in thrust, it is necessary to develop a better quality lubricant that can overcome these problems as soon as possible. From this perspective, a lubricating material comprised of a mixture of surfactant and flyash was developed. In this paper, in order to examine the characteristics and behaviour of the flyash surfactant mixture developed for use as a lubricant, fundamental and site investigations were performed.

本文言語英語
ホスト出版物のタイトルNASTT/ISTT International No-Dig Conference and Show 2009, including the Annual Technical Conference of North American Society for Trenchless Technology, No-Dig 2009
ページ1110-1120
ページ数11
2
出版ステータス出版済み - 2009
イベントNASTT/ISTT International No-Dig Conference and Show 2009, including the Annual Technical Conference of North American Society for Trenchless Technology, No-Dig 2009 - Toronto, ON, カナダ
継続期間: 3 29 20094 3 2009

その他

その他NASTT/ISTT International No-Dig Conference and Show 2009, including the Annual Technical Conference of North American Society for Trenchless Technology, No-Dig 2009
Countryカナダ
CityToronto, ON
Period3/29/094/3/09

All Science Journal Classification (ASJC) codes

  • Geology
  • Geophysics
  • Geotechnical Engineering and Engineering Geology
  • Civil and Structural Engineering
  • Mechanical Engineering
  • Building and Construction

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