METHOD OF TRENCHLESS LAYING OF PIPE LINES ON SOIL Russian patent published in 1999 - IPC

FIELD: construction engineering; laying pipe lines in and slightly cohesive soils. SUBSTANCE: wells are drilled in route of pipe line between working and intake pits. The passage is washed out from working pit to nearest well and pipe line is introduced in this passage. Washing-out the passage is performed by jets of liquid and gas fed from end-piece of pipe line. Washing-out sections of passage and introducing pipe lines in them are performed in turn at stop of end-piece line in well. In introducing the pipe line into successive section, it is widened by jets directed at angle relative to pipe line. EFFECT: reduced expenses for performing jobs. 2 cl