Method and apparatus for continuous production of quick-setting

Details Method and apparatus for continuous production of quick-setting Method and apparatus for continuous production of quick-setting

1996-05-17

1998-09-08

Taylor, Dennis L.

Hydraulic and earth engineering

Underground passageway, e.g., tunnel

Boring

4051501, 405154, 405132, 138 98, E21D 1110

Patent

active

058036652

ABSTRACT:
A method and apparatus for continuous production of a quick-setting foamed cement grout, in which the individual constituents of the grout are proportionally adjustable. Finished foam and cement slurry are mixed at metered rates to form a foamed cement grout which is pumped to a wye connection proximate a remote injection site. Sodium silicate solution is added at the wye connection at a metered rate, using a second metering pump. The sodium silicate solution mixes with the foamed cement grout to greatly accelerate the setting time thereof, and compressed air may also be added to accelerate the passage of the material through the injection hose and nozzle. The quick-setting material is particularly suited for use with a tunnel boring machine (TBM), to grout the annular cavity between the tunnel bore and the segmented liner which is installed therein.

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Halliburton Services, Industrial Grouting Technical Data, Injector G Silicate Grouting Service.
Soast, Allen, "Mix halts flowing water in seconds," ENR Feature, Jul. 20, 1989.

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