UNDERGROUND PIPELINE ROUTING METHOD, AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2013 - IPC F16L1/26 

FIELD: machine building; pipeline.

SUBSTANCE: method consists in excavation of a trench, laying of pipeline at its bottom with arrangement of two drain channels on both of its sides, at that, the above drain channels consist of tubular elements connected to each other, and backfilling of the trench with soil. Sections of trench bottom surface are made at an angle with lowering towards its vertical axis. Connected tubular elements are fixed in the space between pipeline and trench bottom; after that, pipeline, trench bottom, side surfaces of tubular elements and trench are covered with flexible water-permeable mats with their further soil backfilling, with its covering with free side sections of mats and final backfilling of the trench. Each tubular element is made in the form of bending stiff straight prism of triangular section, which consists of three panels from high-strength fibreglass. The panel that is adjacent to pipeline is curved in cross sections along the radius equal to radius of external surface of pipeline. The panel that contacts the water-permeable mat is flat and has through holes. One end section of each tubular element is made in the form of similar prism arranged without any gaps flush with external surfaces with similar tubular element adjacent to it.

EFFECT: providing stable position of section of pipeline and soil in trench at route slopes.

3 cl, 3 dwg