Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1983-09-19
1986-03-18
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
175 62, F16L 102
Patent
active
045765154
ABSTRACT:
A pipe laying apparatus having an excavator for performing excavation in the earth to form a substantially horizontally extending hole, with the excavator having connected to its trailing end a leading end of at least one underground pipe at least partially located in the horizontally extending hole, an injector for injecting a viscosity imparting liquid into the earth in which excavation is being performed by the excavator to produce viscosity imparting liquid containing soil particles. A propelling device positioned against a trailing end of the pipe and is located in a starting pit. The viscosity imparting liquid containing soil particles produced by the excavator and injector are conveyed rearwardly of the excavator past an outer periphery thereof and filled in an annular gap defined between the horizontally extending hole and the pipe while the excavator and pipe are advanced by the propelling device. A soil particle discharging device is located between the trailing end of the excavator and the leading end of the pipe and within the pipe for introducing into the pipe the viscosity imparting liquid conveyed rearwardly of the excavator past the outer periphery thereof and discharging the soil particles into the starting pit through the pipe.
REFERENCES:
patent: 3778107 (1973-12-01), Haspert
patent: 3894402 (1975-07-01), Cherrington
patent: 4221503 (1980-09-01), Cherrington
Ae Osamu
Iwai Yoshiyuki
Miyanagi Naoki
Morimoto Keiji
Ogata Kojiro
Corbin David H.
Hitachi Construction Machinery Co. Ltd.
Nippon Telegraph & Telephone Public Corp.
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