Abstract
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.
| Original language | English |
|---|---|
| Title of host publication | International Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW |
| Pages | 296-300 |
| Number of pages | 5 |
| Publication status | Published - Dec 1 2008 |
| Event | 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW - Moscow, Russian Federation Duration: Jun 3 2008 → Jun 6 2008 |
Publication series
| Name | International Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW |
|---|
Other
| Other | 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW |
|---|---|
| Country | Russian Federation |
| City | Moscow |
| Period | 6/3/08 → 6/6/08 |
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All Science Journal Classification (ASJC) codes
- Geology
- Geophysics
- Geotechnical Engineering and Engineering Geology
- Civil and Structural Engineering
- Mechanical Engineering
- Building and Construction
Cite this
Lubrication property requirements for injection into over-cutting area using extra-large-diameter slurry pipe jacking. / Shimada, H.; Yoshida, Y.; Sasaoka, T.; Fujita, S.; Ichinose, M.; Iino, M.; Matsui, K.
International Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW. 2008. p. 296-300 (International Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW).Research output: Chapter in Book/Report/Conference proceeding › Conference contribution
}
TY - GEN
T1 - Lubrication property requirements for injection into over-cutting area using extra-large-diameter slurry pipe jacking
AU - Shimada, H.
AU - Yoshida, Y.
AU - Sasaoka, T.
AU - Fujita, S.
AU - Ichinose, M.
AU - Iino, M.
AU - Matsui, K.
PY - 2008/12/1
Y1 - 2008/12/1
N2 - 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.
AB - 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.
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M3 - Conference contribution
AN - SCOPUS:84877838022
SN - 9781605604138
T3 - International Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW
SP - 296
EP - 300
BT - International Society for Trenchless Technology - 26th No-Dig International Conference and Exhibition 2008, No-Dig 2008 MOSCOW
ER -