METHOD FOR TRENCHLESS INSTALLATION OF TRAYS UNDER MOTOR AND RAIL ROADS IN CONSTRUCTION OF MAIN PIPELINES Russian patent published in 2009 - IPC F16L1/28 

FIELD: technological processes.

SUBSTANCE: invention is related to construction of pipeline transport and is used in installation of pipelines under motor and rail roads. Receiving and working foundation pit is prepared, guide frame is laid on bottom of working foundation pit, pipe is placed on the latter, and its diametre is 10-30 times less than diametre of pipeline tray. Preliminarily low diametre guide channel is manufactured by piercing of cord along axis of specified location of tray, low-capacity linear explosive substance (ES) is placed in it, exploded, then pipe with conic tip that is 2-31 times less than tray diametre is inserted into prepared guide channel of low diametre. Ground piercing is done with welding of pipe segments until tip exits into receiving foundation pit, low diametre pipe is withdrawn, and linear ES is pulled through produced well. On the road, above area of tray installation, energy-reflecting or energy-absorbing screens are laid, or their combination, and extended ES charge is exploded, and tray is entered into produced channel.

EFFECT: simplifies and accelerates pipeline installation under road.

4 cl; 3 dwg