METHOD FOR TRENCHLESS LAYING OF PIPES IN GROUND Russian patent published in 1995 - IPC

FIELD: trenchless laying of pipes. SUBSTANCE: method for trenchless laying of pipes includes moving of percussive-vibration grab over inner space of pipe to be laid towards face. Then, ground mass is weakened and opening is made by percussive-vibration forcing of ground taker into ground mass. Pipe with opened front end is inserted into opening. Grab filled with ground is withdrawn by ground taker from inner space of pipe, and ground taker is emptied under the action of impact. Ground mass is weakened by drilling two rows of holes in parallel to axis of laid pipe, and nonexplosive pneumatic vibration sources are placed in drilled holes. Simultaneously, vibrations are excited in sources, and injected into holes are ground weakening solutions. Then, stage- by-stage vibration action is exerted on ground mass. EFFECT: higher efficiency. 8 cl, 1 dwg