Hydraulic and earth engineering – Earth treatment or control – Compaction
Patent
1981-05-01
1983-08-09
Byers, Jr., Nile C.
Hydraulic and earth engineering
Earth treatment or control
Compaction
405154, 405269, E02D 302
Patent
active
043975909
ABSTRACT:
This invention relates to a backfill compaction apparatus of a type particularly well suited to the puddling and compaction of loose soil around pipes laid in trenches, such apparatus being characterized by a self-propelled carriage adapted to straddle the pipe and advance therealong incrementally, a mast supported in upstanding relation on the front end of the carriage, a forwardly-extending boom mounted on the mast for vertical movement relative thereto, means operatively interconnecting the mast and boom for raising and lowering the latter, a tool-carrying platform suspended from the boom in overhanging relation to the trench to be backfilled, at least one pair of transversely-spaced combination puddling and vibrating subassemblies hanging from the tool-carrying platform adapted to enter the trench on opposite sides of a pipe laid therein, said subassemblies each including an elongate rigid nozzle for introducing water beneath the surface of the backfill and a vibrator connected to said nozzle for movement therewith, means for introducing water into said nozzles connectable to a remote pressurized source thereof, and a self-contained hydraulic system on board the carriage for powering the vibrators. The invention also encompasses the novel method of compacting backfill which comprises digging a hole into the backfill with a jet of water under pressure while simultaneously vibrating the surrounding loose soil until it caves into the puddle of water at the bottom of the hole thus produced.
REFERENCES:
patent: 2334228 (1943-11-01), Steuerman
patent: 2488915 (1949-11-01), Jackson
patent: 2718761 (1955-09-01), Steuerman
patent: 2755632 (1956-07-01), Hauber
patent: 3130552 (1964-04-01), Bodine
patent: 4112692 (1978-09-01), Anderson
patent: 4126007 (1978-11-01), Mars
patent: 4154551 (1979-05-01), Petrie
patent: 4280770 (1981-07-01), Woodruff
Fink John J.
Friesen Orlando H.
Byers Jr. Nile C.
Spangler, Jr. Edwin L.
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