Hydraulic and earth engineering – Earth treatment or control
Patent
1980-08-04
1983-01-25
Taylor, Dennis L.
Hydraulic and earth engineering
Earth treatment or control
299 16, 405266, E21D 1900
Patent
active
043700772
ABSTRACT:
A finite region of overpressure can be created in solid underground formations by the periodic injection of a fluid that has finite gel strength that subsequently, after each injection, partially sets--i.e., equivalently becomes a very much stronger gel. A region of overpressure is a region in which the static, locked in pressure is larger than what was there before. A region of overpressure can be used to prevent a roof of a tunnel from caving by adding compressive stresses in the roof. A sequence of regions of overpressure can be used to lift an arch or dome underground, squeeze off water or gas flows, stabilize dams, foundations, large underground rooms, etc. In general, the stress or pressure distribution in rock can be altered and engineered in a fashion that is more advantageous than what would have been the case without overstressing.
REFERENCES:
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patent: 2434301 (1948-01-01), Wertz
patent: 2947146 (1960-08-01), Loofbourow
patent: 3222872 (1965-12-01), Larnefors et al.
patent: 3518834 (1970-07-01), Gnaedinger et al.
patent: 3583166 (1971-06-01), Graf
patent: 3934420 (1976-01-01), Janelid et al.
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