METHOD FOR TRENCHLESS LAYING OF SUBSURFACE SERVICE LINE Russian patent published in 1999 - IPC

Abstract RU 2142535 C1

FIELD: construction engineering. SUBSTANCE: according to method, initially pipe is driven into ground mass with front end of pipe being open. Then, ground is removed from internal space of pipe. Laying of subsurface service line is effected by successive driving of several pipes. Each subsequent pipe is located inside another pipe of larger diameter already driven into ground. This operation is carried out after removing ground from larger diameter pipe. External diameter of each subsequent pipe driven into ground is equal to not more than 0.93 of internal diameter of corresponding pipe of larger diameter. Application of aforesaid method allows for trenchless laying of subsurface service lines of larger length. EFFECT: higher efficiency. 7 cl, 6 dwg

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RU 2 142 535 C1

Authors

Dobrosel'Skij P.V.

Dates

1999-12-10Published

1997-12-16Filed