Plastic and nonmetallic article shaping or treating: processes – Forming structural installations in situ – Arched – domed – or vertical-cylindrical structure
Patent
1976-03-22
1978-05-09
Pavelko, Thomas P.
Plastic and nonmetallic article shaping or treating: processes
Forming structural installations in situ
Arched, domed, or vertical-cylindrical structure
61 722, 264 33, 264156, 264333, 425 59, B63B 3504
Patent
active
040887200
ABSTRACT:
A method of building underground pipelines by forming a casing in a hole from a forming material which is compacted in the direction from the center of the hole toward its walls. The hole is first filled with the forming material throughout its cross-sectional area and then the material is compacted in the direction towards the walls of the hole. Compaction is effected by a device comprising a rod-shaped body adapted for moving through the hole, the front end of the body being provided with a system of radial ribs.
REFERENCES:
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patent: 3754066 (1973-08-01), Black
Ardyshev Valentin N.
Filippov Vasily V.
Grigoraschenko Vladimir A.
Gurkov Konstantin S.
Klimashko Vladimir V.
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