Hydraulic and earth engineering – Subterranean or submarine pipe or cable laying – retrieving,... – Repair – replacement – or improvement
Patent
1981-08-26
1983-06-14
Corbin, David H.
Hydraulic and earth engineering
Subterranean or submarine pipe or cable laying, retrieving,...
Repair, replacement, or improvement
405133, 166 50, E03F 306, E21D 100
Patent
active
043880215
ABSTRACT:
A method of making canalization by pressing a string of sewer pipes in a water-conductive ground with an underground water level, is based on the formation of a water-tight working shaft or trench, then a front partition with a starting opening is erected at the side of the trench through which the string is to be advanced; then a sealed tubular cutting member is inserted into the starting opening and the sheet piling opposite the starting opening is lifted and then by an electrohydraulic pressing unit the cutting member is pressed into the soil. The cutting member is in the form of a tubular jacket having a roof-like projection at its leading edge; a cylindrical concave body is arranged in the jacket and is in contact with a thrust ring projecting radially inwardly from the jacket; the rear end portion of the jacket embraces the leading edge of the sewer pipe string and control hydraulic jacks are situated between the end face of the pipe string and the thrust ring; a mounting flange is connected to the thrust ring and supports a partition assembled of two sections which are hermetically connected to the mounting flange. The partition is provided with closeable window and with openings for the worm conveyor for removing sod from the leading part of the cutting member.
REFERENCES:
patent: 1948707 (1934-02-01), Gilman
patent: 3530677 (1970-09-01), Ede
patent: 4322180 (1982-03-01), Uemura et al.
Corbin David H.
Pistel Nancy J.
Striker Michael J.
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