METHOD OF CONSTRUCTING BURIED PIPELINE IN CROSSING SECTION WITH FORECAST CONCENTRATED DEFORMATIONS OF ENCLOSING STRATA Russian patent published in 2012 - IPC F16L1/28 

FIELD: machine building.

SUBSTANCE: method comprises defining concentrated deformations on length l₀ along pipeline axis between boundaries of crossed section and maximum pipeline deflection on preset position on said length in direction of enclosing strata maximum effects: possible deflection f₁ from strata deformations conditions and tolerable deflection f₂ from pipeline strength. Then trench is excavated with axis in plan aligned with pipeline axis to lay pipeline and fill trench with soil/ In case deflection f₁ exceeds f₂, pipeline is provided with two compensation lengths. Every length, within limits of preset lengths l₁ and l₂, covers crossed section boundary while, when combined, they increase length of deflected pipeline from l₀ to design magnitude l_p. Combined operation of said compensation sections allows pipeline deflection at crossed section center of a=f₁-f₂ with obeyance of pipeline strength condition over pipeline entire deflected design length l_p. Compensation section is equipped with deformable strap fitted to pipeline on side opposite maximum effects of enclosing strata.

EFFECT: expanded operating performances.

11 cl, 6 dwg