Method of hardening soft ground

Details Method of hardening soft ground Method of hardening soft ground

1985-01-25

1986-01-28

Novosad, Stephen J.

Hydraulic and earth engineering

Earth treatment or control

Chemical

404 76, 405269, E02D 312, E02D 518, E01C 736

Patent

active

045668256

ABSTRACT:
The present invention provides a method of improving soft ground.
In this method, slurry formed by a mixture of cement-based hardener and water is supplied to the soft ground under pressure and is mixed with soft soil thereby to harden the same. Then, at least when a ground improvement machine having mixing propellers is penetrated into the above-mentioned soft soil, the cement-based hardening slurry is discharged from the mixing propellers.
Further, in another method of improving soft ground according to the present invention, slurry formed by a mixture of cement-based hardener and water is supplied to the soft ground under pressure and is mixed with soft soil. Then, when deep and short walls, both consisting of mixed layer of the cement-based hardening slurry and the soft soil are formed one after the other, a plurality of deep walls are formed at a distance therebetween and then the short walls are jointly formed between a plurality of these deep walls.

REFERENCES:
patent: 4065928 (1978-01-01), Takagi et al.
patent: 4084383 (1978-04-01), Kukino et al.
patent: 4089183 (1978-05-01), Endo et al.

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