Grout impregnation method

Details Grout impregnation method Grout impregnation method

1986-12-12

1988-02-16

Taylor, Dennis L.

Hydraulic and earth engineering

Earth treatment or control

Chemical

405260, 405303, E02D 312

Patent

active

047251697

ABSTRACT:
An improved grout impregnation method which uses an injection tube for contacting and mixing different kinds of materials supplied thereinto separately to prepare a grout and impregnates the grout into the earth through an injecting opening provided at a tip end of the tube.
In this method, a first pressure-holding valve is provided within a higher-pressure path for one of the materials which is supplied under a higher pressure, a mixing section is provided downstream the first pressure-holding valve but in the vicinity thereof for contacting and mixing said one of the materials with another one which is supplied under a lower pressure, and a second pressure-holding valve is provided downstream the mixing section; said one of the materials is passed through the first pressure-holding valve, which reduces the pressure of said one of the materials, and then contacted and mixed with said another one at the mixing section; the contacting and mixing is carried out under a pressure exceeding an atmospheric pressure and determined by the second pressure-holding valve; and the grout resulting from the contacting and mixing and passing through the second pressure-holding valve is impregnated into the earth through the injection opening.

REFERENCES:
patent: 3518834 (1970-07-01), Gnaedinger et al.
patent: 3986536 (1976-10-01), Janson
patent: 4302132 (1981-11-01), Ogawa et al.
patent: 4449856 (1984-05-01), Tokoro et al.

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