CONSTRUCTION METHOD OF UNDERGROUND PIPELINE AT INTERSECTION OF TECTONIC BREAKS Russian patent published in 2009 - IPC F16L1/28 

FIELD: civil engineering.

SUBSTANCE: invention relates to construction and can be used at subsurface pipelining, intersecting areas of tectonic fractures. In construction methods of underground pipeline at intersection of tectonic fractures in the capacity of trays there are used cylindrical closed shells, filled by compresses air. Shell is fixed helical on outer face of pipeline lengthwise its welded section. Shells are connected to each other by nipple with ability of pumping and air pressure checkup in it through the air duct. Shell diametre is accepted equal to 0.15D, where - D - outside diametre of pipeline, m. Distance between turns is accepted equal to 0.2D, m. Inclination angle of turns to horizontal line is accepted equal to not less than 45°. Shells are installed on pipeline in area of tectonic fracture with overlapping of this area more than 4 times lengthwise pipeline.

EFFECT: application of particular construction method of underground pipeline at intersection of tectonic fractures provides effectiveness increase; reduction of mounting laboriousness; reduction of maintenance laboriousness.

2 cl, 2 dwg