METHOD OF TRENCHLESS LAYING OF PIPELINES Russian patent published in 2024 - IPC F16L1/28 E21D9/08 

FIELD: construction.

SUBSTANCE: invention relates to construction. Method includes preparation of starting and receiving pits. Equipment for horizontal directional drilling is mounted in the starting pit, and pilot wells are drilled at angle of 0 and 225 degrees relative to the axis of the future case in its cross section. Drilling equipment is dismantled and equipment for soil development is mounted. Further, work is carried out in the starting and receiving pits. Working member is stored in the pilot well at 225 degrees relative to the axis of the future case in its cross section, soil is developed in the lower section of the circular area from the pilot well at 225 to 135 degrees relative to the axis of the future case in its cross section. Section is fixed after excavation of soil. Then soil is developed in upper section of circular area: working element is stored in pilot well at 0 degrees with further development of soil alternately in two directions clockwise at 0-135 and 0-225 degrees counterclockwise. Then, equipment for excavation of soil from pits is dismantled and soil is excavated.

EFFECT: broader capabilities of trenchless laying of pipes for rocky and siliceous soils, high accuracy of the laid path, possibility of forming a tunnel of various diameters and profiles using one operating principle of equipment with a wide range of control, no need to carry out works on the entire area of the section in its cross section and length when performing works in soils with high bearing capacity.

11 cl, 10 dwg