METHOD OF TRENCHLESS PLACEMENT OF CASINGS UNDER ROADS AND RAILWAYS IN CONSTRUCTION OF MAIN PIPELINES Russian patent published in 2016 - IPC F16L1/28 F16L7/00 

FIELD: building industry.

SUBSTANCE: working and receiving pits are prepared. A guide frame is laid on the bottom of a working pit, a pipe is laid on the latter, which has a diameter of 2-31 times smaller than the diameter of the pipeline casing. The guide channel is preliminarily manufactured, which has a small diameter along the axis of a given location of the casing, a low-power linear high explosive (HE) is placed in it, it is undermined, then a guide pipe is inserted into the resulting guide channel of a larger diameter, in which a pipe with a conical tip is preliminarily inserted. Soil sampling is carried out by welding large pipe segments before the conical tip enter to the receiving trench, the guide pipe and the pipe performing puncture are removed. The computed charge of linear HE is pulled through the resulting channel, and undermined, and the casing is placed in the resulting channel. To prevent the landslide of the soil edges, filling of the channel with HE is carried out, retreating from its edges by 100-150 mm.

EFFECT: invention simplifies and significantly speeds up laying of the pipeline under the road.

2 cl