Behavior of over-cutting area injected by flyash surface-active agent mixture material

Hideki Shimada, T. Kawai, Takashi Sasaoka, K. Matsui, M. Ichinose, S. Fujita, M. Iino, Y. Yoshida

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

Abstract

Lubrication can effectively reduce the needed thrust 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 ground water pressure and stabilize the over-cutting area. Lubricant should fill the complete over-break void to minimize surface settlement. However, it was 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 to not lose its function as a support against the overburden pressure of an overcutting area and to enable a reduction in thrust, it is necessary to develop a better quality lubricant which can overcome these problems as soon as possible. From this perspective, a lubricating material comprised of a mixture of the surface-active agent and flyash was developed. In this paper, in order to examine the characteristics and behavior of the flyash surface-active agent mixture developed for use as a lubricant, a fundamental investigation is performed.

Original languageEnglish
Title of host publicationInternational Society for Trenchless Technology - 25th No-Dig International Conference and Exhibition, Roma 07: Mediterranean No-Dig 2007
Pages226-235
Number of pages10
Publication statusPublished - 2007
Event25th No-Dig International Conference and Exhibition, Roma 07: Mediterranean No-Dig 2007 - Rome, Italy
Duration: Sep 10 2007Sep 12 2007

Other

Other25th No-Dig International Conference and Exhibition, Roma 07: Mediterranean No-Dig 2007
CountryItaly
CityRome
Period9/10/079/12/07

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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  • Cite this

    Shimada, H., Kawai, T., Sasaoka, T., Matsui, K., Ichinose, M., Fujita, S., Iino, M., & Yoshida, Y. (2007). Behavior of over-cutting area injected by flyash surface-active agent mixture material. In International Society for Trenchless Technology - 25th No-Dig International Conference and Exhibition, Roma 07: Mediterranean No-Dig 2007 (pp. 226-235)