METHOD OF TRENCHLESS PIPE LAYING Russian patent published in 2008 - IPC F16L1/00 

FIELD: building, pipeline.

SUBSTANCE: invention concerns building of pipeline transport and is used at laying of pipes in the ground under an obstacle using tunneling machines, during trenchless pipe laying in frozen, unstable and non-uniform grounds. Excavate a foundation ditch; establish a working cradle with guidelines under the tunneling machine and the pipeline. Prepare a working face and enter a shield. Excavation in the working face is performed inside the shield with delivery of the ground from the working face. Incorporate the shield separately with the head and tail sections in the ground. Perform laying of the pipe line behind the shield. Fix the bypass block in the tail section, establish an auxiliary cradle with coupling gears and mount the traction gear in a foundation ditch. Advance the head piece of the auxiliary pipeline to the tail section; fix the first coupling gear on the butt end from the side of the working face, the tail section is moved forward on volume of the entry way to the head section, and a head piece of the auxiliary pipeline is moved to the tail section by means of the traction gear. Starting from the head piece of the auxiliary pipeline consistently move each piece of the auxiliary pipeline following it with the coupling gear. Drag the working pipeline inside the auxiliary pipeline with simultaneous extraction of coupling gears. Space between the auxiliary and working pipeline is filled with hardening structure.

EFFECT: provision of trenchless pipe laying.

2 cl, 5 dwg