METHOD FOR HYDRAULIC INSULATION OF PIPELINE ACCESS MANHOLE IN SWAMPS AND LAKES Russian patent published in 2013 - IPC F16L59/14 E02D29/12 

FIELD: construction.

SUBSTANCE: water is pumped from a well, through which a pipeline stretches, which is connected with well walls by means of cylindrical cases. Afterwards old hydraulic insulation is removed, and case and working pipe walls are cleaned from rust and degreased. Further in each cylindrical case they install a hydraulic seal from early strength material "Maxplug", then nozzles are installed in each hydraulic seal, through which a hydraulic composition is pumped, such as the expanding material "Aquidur". Then a gland of a sealant made on the basis of modified silyl "Vitrafin Bond" is installed on the neck of each case. The gland is reinforced with a net made in two layers. The end part of the case neck being directly located in the pipeline access manhole is coated with a protective coating in the form of an aluminised adhesive tape of "Gerlen" grade, preventing the gland against mechanical damage.

EFFECT: increased reliability, efficiency, operating capabilities of hydraulic insulation with simultaneous increase of durability.

5 cl, 3 dwg