Cost Reduction and Environmental Protection in Pipe Jacking Method

Abstract

The cost reduction and environmental protection are large social problems under severe finance. Hume-pipe jacking has been created as the result of pursuing the theme of environment trendy and cost reduction. Making installation piping as outer shell of excavation machine had long been thought impossible, but adopting composite pipe consisting of an outer steel pipe with an internal PC concrete pipe enabled the installation pipe used as the excavation machine with its high strength.
This allows the pipe-jacking directly arrive at an existing shield tunnel or manhole, not requiring the construction of a recovery shaft for the equipment. Furthermore, since the unit is re-usable, 10 to 20% of cost reduction becomes possible.
The method causes no noise and traffic troubles to the local residents and is corresponding to the environment issues.