Method and apparatus for increasing bearing capacity of soft soi

Details Method and apparatus for increasing bearing capacity of soft soi Method and apparatus for increasing bearing capacity of soft soi

1989-11-20

1991-01-01

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405270, 405267, 405263, E02D 520

Patent

active

049813994

ABSTRACT:
A method and apparatus for forming a subsurface zone having an increased bearing capacity in a preselected area of relatively soft soil is disclosed. A liquefaction generator is provided in the form of a plurality of interconnected perforated pipes forming a grid pattern which substantially extends over the preselected area. Air and water under pressure are supplied to the liquefaction generator while allowing it to sink within the soft soil to a subterranean layer of hard soil or rock. The air and water are continually supplied to the generator until the soil above it is in a state of liquefaction and thereafter a hardenable material and/or rock fragments are added to the liquified soft soil above the generator. Thereafter, the mixed soil and added material is allowed to solidify over a period of time. For sites containing areas of compacted material, cutters may be attached to pipes of the liquefaction generator to further break up the soil material. The method may also be applied to the construction of subterranean cutoff walls with or without embedded, vertical, moisture impervious membranes.

REFERENCES:
patent: 965895 (1910-08-01), Hardin
patent: 4102145 (1978-07-01), Van Steveninck et al.
patent: 4309129 (1982-01-01), Takahashi
patent: 4601612 (1986-07-01), Primrose
patent: 4666346 (1987-05-01), Macleod
patent: 4690590 (1987-09-01), Nussbaumer et al.
patent: 4863312 (1989-09-01), Cavalli

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