FIELD: transport.
SUBSTANCE: pipeline to be replaced is axially moved by a pusher-pipe on to its end face surface. The tunnel shield is used to excavate soil of this section with a simultaneous pushing the old pipe out and forming a space with diameter corresponding to the new pipe diameter. Then, a new pipeline is laid in place.
EFFECT: higher efficiency of large-diameter pipeline replacement jobs.
2 dwg
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Authors
Dates
2008-09-20—Published
2007-03-15—Filed