Method and apparatus for improving the strength of soft viscous

Details Method and apparatus for improving the strength of soft viscous Method and apparatus for improving the strength of soft viscous

1978-05-08

1982-01-05

Corbin, David H.

Hydraulic and earth engineering

Earth treatment or control

Chemical

73 84, 405267, E02D 312

Patent

active

043091296

ABSTRACT:
A method and an apparatus for improving the strength of a soft viscous ground are disclosed. For improving the strength of an area of some extent, hardenable liquid consisting essentially of cement milk is injected into each one of a plurality of preselected points for promoting dehydration and compaction of the ground. The liquid is hardened in a short time for forming a rigid tree-like structure. A measure or index for the local ground strength is obtained at first by using a measuring/injection device, and the injection pressure is set to be slightly larger than the measure or index so obtained. The liquid may then be permeated into the soft viscous ground at substantially the same injection pressure until the ground is consolidated satisfactorily.

REFERENCES:
patent: 2357769 (1944-09-01), Rushmer
patent: 2440921 (1948-05-01), Stephens
patent: 3148538 (1964-09-01), Heerema
patent: 3243962 (1966-04-01), Ratliff
patent: 3397542 (1968-08-01), Moulden
patent: 3623330 (1971-11-01), Nakade et al.

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