FIELD: repair of pipe-lines in crossings through ravines, gullies and small stream flows. SUBSTANCE: in place of repair the pipe-line is to be lined, a housing-shell is installed on the lining, and weights are suspended; the upper generating lines being positioned below the upper generating line of the housing-shell providing for backfilling of the housing-shell and weights with a slope of 1:2. EFFECT: simplified method, enhanced safety of repair work and reduced labour content. 1 dwg
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Authors
Dates
1999-11-27—Published
1998-02-23—Filed