Lubrication property requirements for injection into over-cutting area using extra-large-diameter slurry pipe jacking

H. Shimada, Y. Yoshida, T. Sasaoka, S. Fujita, M. Ichinose, M. Iino, K. Matsui

研究成果: 書籍/レポート タイプへの寄稿会議への寄与

抄録

Lubrication can effectively reduce the needed thrust if a discrete layer of lubricant is maintained between a pipe and the excavated soil. A lower frictional force allows greater jacking lengths to be achieved. The reduction of frictional stress around the pipe strongly affects the efficiency of lubrication injection. 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. The lubricant should also fill the over-break void completely to minimize surface settlement. However, for a commercial lubricant to be effective, it has been suggested that ingredients such as sodium and potassium be eliminated. As a result, in order that a lubricant does not lose its function as a support against the overburden pressure of an over-cutting area and to enable a reduction in thrust, a higher quality lubricant which can overcome these problems must be developed as soon as possible. In this paper, in order to examine the characteristics and behavior of a material developed as a lubricant for extra-large-diameter slurry pipe jacking systems, a fundamental investigation is performed and the various results are discussed.

本文言語英語
ホスト出版物のタイトルInternational Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW
ページ296-300
ページ数5
出版ステータス出版済み - 12月 1 2008
イベント26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW - Moscow, ロシア
継続期間: 6月 3 20086月 6 2008

出版物シリーズ

名前International Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW

その他

その他26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW
国/地域ロシア
CityMoscow
Period6/3/086/6/08

!!!All Science Journal Classification (ASJC) codes

  • 地質学
  • 地球物理学
  • 地盤工学および土木地質学
  • 土木構造工学
  • 機械工学
  • 建築および建設

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