Re-rounding deflected underground plastic pipe and remedying ove

Details Re-rounding deflected underground plastic pipe and remedying ove Re-rounding deflected underground plastic pipe and remedying ove

1982-10-26

1984-07-03

Taylor, Dennis L.

Hydraulic and earth engineering

Subterranean or submarine pipe or cable laying, retrieving,...

138 97, 405156, F16L 100, F16L 5518

Patent

active

044576471

ABSTRACT:
Re-rounding generally horizontally installed, covered, below-ground flexible conduits with eccentrically deflected upper walls, correcting over-belling, and obtaining primary compaction of soil in the vicinity of the conduits. A casing assembly has a central cylindrical tubular gauging portion nearly filling the conduit diameter, a tapered forward nose portion welded thereto and an off-center smaller-diameter cylindrical tubular rear portion welded thereto and providing continuity along the bottom of said casing assembly but recessed at the top and sides. An air-jet-driven ball-type vibrator is rigidly secured to the bottom of the rear portion, and is actuated by air through an inlet tangentially to the vibrator. This assembly is drawn slowly through the pipe at a substantially constant pull force no greater than 1500 pounds, and preferably no faster than 1/2 foot per second, and the bottom wall of the rear portion is vibrated, when desired, in a substantially vertical plane, so as to compact the soil below the pipe and to each side near the bottom while also strengthening the soil arch above the pipe. In some uses water is flowed downstream around and past the apparatus during this time.

REFERENCES:
patent: 2730176 (1956-01-01), Herbold
patent: 2743090 (1956-04-01), Malan
patent: 3231025 (1966-01-01), Bodine
patent: 3543377 (1970-12-01), Bremner
patent: 3602263 (1971-08-01), Bremner
patent: 3770054 (1973-11-01), Solum
patent: 3948329 (1976-04-01), Cummings
patent: 4309128 (1982-01-01), Williams

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