METHOD FOR LAYING SUBSURFACE PIPELINE Russian patent published in 2014 - IPC F16L1/06 F16L1/28 

FIELD: construction.

SUBSTANCE: method consists in excavation of a trench, laying of a pipeline in the trench, overlapping its bottom, lateral surfaces and the trench benching with flexible carpets with formation of lateral pockets, their filling and filling of the pipeline top with soil, soil overlapping with longitudinal areas of the carpets and final filling of the trench with formation of the outer ridge. Before the pipeline laying into the trench, an additional lower flexible carpet is laid, the width of which is larger that the length of the inner transversal perimeter of the trench. The end parts of the additional lower carpet are designed with holes with the possibility of placing in them the pins, securing the carpet on the berms after the final filling of the trench with soil. Metal hinges are fastened at the ends of the lower and upper carpets with the possibility of interaction of lifting mechanisms, used when carrying out repair operations on the pipeline, with hooks. The hinges at the ends of the upper carpet after soil filling into the trench can be interconnected by means of a detachable device.

EFFECT: reduction of time consumption and labour intensity at the repair of the pipeline, increase of fixation reliability of the pipeline laid in the trench.

2 cl, 3 dwg