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

Research output: Chapter in Book/Report/Conference proceedingConference contribution

Abstract

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.

Original languageEnglish
Title of host publicationNASTT/ISTT International No-Dig Conference and Show 2009, including the Annual Technical Conference of North American Society for Trenchless Technology, No-Dig 2009
Pages1110-1120
Number of pages11
Volume2
Publication statusPublished - 2009
EventNASTT/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, Canada
Duration: Mar 29 2009Apr 3 2009

Other

OtherNASTT/ISTT International No-Dig Conference and Show 2009, including the Annual Technical Conference of North American Society for Trenchless Technology, No-Dig 2009
CountryCanada
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

Fingerprint Dive into the research topics of 'Property of flyash surfactant injection into overcutting area as lubricant for slurry pipe jacking'. Together they form a unique fingerprint.

  • Cite this

    Shimada, H., Yoshida, Y., Sasaoka, T., Matsui, K., Fujita, S., Kawai, T., & Iino, M. (2009). Property of flyash surfactant injection into overcutting area as lubricant for slurry pipe jacking. In NASTT/ISTT International No-Dig Conference and Show 2009, including the Annual Technical Conference of North American Society for Trenchless Technology, No-Dig 2009 (Vol. 2, pp. 1110-1120)