METHOD OF TRENCHLESS UNDERGROUND COMMUNICATIONS LAYING AND DEVICE FOR ITS IMPLEMENTATION Russian patent published in 2004 - IPC

FIELD: building, particularly method and devices for pipeline laying. SUBSTANCE: method involves driving pipe into soil for desires length, fixing pipe by means of stop; removing soil from pipe by impacts imparted to pipe; stopping impact action on pipe; disconnecting stop from pipe after driving each pipe part. Pipe is driven into clay-sandy soil for length of not more than 9 inner pipeline diameters and into clayey soil for length of not more than 7 inner pipeline diameters. Device for pipeline laying includes pipe, impact mechanism connected to pipe by head with windows for soil removal from pipe and stop. Pipe has conical tip with inner diameter less than inner pipe diameter and with outer diameter exceeding outer pipe diameter. Stop has body, support plate and spring, particularly disc spring, located between body and support plate. Stop is movably connected to pipe and may be fixedly coupled with pipeline. EFFECT: increased pipe driving speed and increased efficiency of soil removal from pipe due to reduced resistance of pipe introduction into soil. 3 cl, 4 dwg