Device for forming modified ground

Details Device for forming modified ground Device for forming modified ground

1992-08-07

1993-08-10

Taylor, Dennis L.

Hydraulic and earth engineering

Miscellaneous

405269, 405266, E02D 518

Patent

active

052342891

ABSTRACT:
An all-round improved ground body forming device comprising a hollow outer casing with an outer metal bit at its tip end and a casing connecting section at its rear end, a casing advancer with an inner bit and a sub-bit for supporting the inner bit at its tip end and an arrowhead-shaped section to be engaged at its rear end, a casing advancer receiving and recovery device which has at its tip end an engaging section to catch the said arrowhead-shaped section and has a contracting and retracting section at an intermediate position between the main body section and the said engaging section, a hardening agent injection rod cosisting of one or more air injection pipes, a hardening agent injection pipe, a high pressure water injection pipe, and a slime discharge pipe, a multiple pipe swivel joint which is provided to correspond with the said hardening agent injection rod, and a method to form an improved ground body by the said device. The said hardening agent injection rod has slime suction hole, a hardening agent jet nozzle, a monitor, a pressure sensor, and a small metal bit.

REFERENCES:
patent: 1987626 (1935-01-01), Klie
patent: 2782605 (1957-02-01), Wertz et al.
patent: 4253781 (1981-03-01), Fischer et al.
patent: 4545702 (1985-10-01), Sano et al.
patent: 4859119 (1989-08-01), Chida et al.
patent: 4971480 (1990-11-01), Nakanishi

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