METHOD FOR TRENCHLESS LAYING OF CASES UNDER ROADS AND RAILWAYS WHILE CONSTRUCTING MAIN PIPELINES Russian patent published in 2017 - IPC F16L1/28 F16L7/00 

FIELD: construction.

SUBSTANCE: working and receiving ditches are prepared. A guide frame is laid onto the bottom of the working ditch, a pipe with a conical tip is arranged thereon. A small-diameter guide channel is preliminarily manufactured, a linear low-power explosive is placed in it, it is exploded, and then in the resulting guide channel of a larger diameter a guide pipe with the length of 2.0-2.5 m, the axis of which coincides with the puncture trajectory, is arranged, into which the pipe with a conical tip is preliminarily inserted. The channel puncture is carried out by large sections of pipes until the pipe sticking in the loamy soil, which prevents the puncture operation from continuing. In the pipe carrying out the puncture, a linear low-power explosive is arranged along the entire length, and shock blasting is performed. The puncture is continued with the pipe released from sticking in the soil before the conical tip exits into the receiving trench, after which the guide pipe and the pipe with the conical tip are removed from the soil. A calculated charge of the linear explosive is pulled into the resulting channel, exploded, and a case is installed in the resulting channel.

EFFECT: invention simplifies and significantly accelerates the pipeline laying under a road while puncturing a long-length channel in a loamy soil.

1 cl