Development of backfilling material using fly ash by application of chemical injection

Hideki Shimada, Yasuhiro Yoshida, Takashi Senda, Yasutaka Maeda, Takashi Sasaoka, Shuichi Fujita, Kikuo Matsui, Dai Watanabe

研究成果: ジャーナルへの寄稿学術誌査読

1 被引用数 (Scopus)


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-cutting area 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 behaviour of a material developed as a lubricant and backfilling for a deeper strata excavation system such as a pipe jacking, a fundamental investigation is performed and the various results are discussed.

ジャーナルInzynieria Mineralna
出版ステータス出版済み - 7月 1 2013

All Science Journal Classification (ASJC) codes

  • 地盤工学および土木地質学
  • 地球化学および岩石学


「Development of backfilling material using fly ash by application of chemical injection」の研究トピックを掘り下げます。これらがまとまってユニークなフィンガープリントを構成します。