In situ waste remediation methods and systems
AssigneesSilar Services Inc., Natural Resource Technology, Inc.
InventorsJames Tim Silar, Glenn R. Luke, Christopher A. Robb, Roy E. Wittenberg
Life of this patent
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Abstract
Disclosed herein are in situ waste remediation methods and systems configured to hydraulically isolate waste material from groundwater. Methods for enclosing and/or remediating waste impoundments, landfills and the like using discrete in situ solidification/stabilization techniques are provided. The disclosed methods and systems provide containment techniques to create a vertical barrier to further isolate waste from groundwater and enhance geotechnical stability by increasing embankment strength, reducing saturated conditions and increasing the overall factor of safety for slope failure.
Claims18
A method for hydraulically isolating waste material from ground water, comprising:
- constructing a low permeability hydraulic barrier between the waste material and the ground water, comprising:
- vertically penetrating the waste material from an upper surface to a desired depth, wherein the desired depth comprises an area selected to construct the hydraulic barrier which isolates the waste material from the ground water;
- and
- applying a cementitious grout at the desired depth, wherein the cementitious grout mixes in situ with the waste material or an in place soil material underlying the waste material,
- whereby the low permeability hydraulic barrier is formed between the waste material and the ground water utilizing the waste material or the in place soil material.
A method for in situ waste impoundment remediation, comprising:
- providing a waste impoundment with waste material therein, the waste impoundment comprising a perimeter and a bottom, the waste material contained within the waste impoundment having an upper surface;
- constructing a discrete horizontal liner in situ at the bottom of the waste impoundment, comprising:
- vertically advancing continuously overlapping large diameter augers from the upper surface of the waste material to a desired depth;
- and
- injecting a cementitious grout at the desired depth, whereby the cementitious grout mixes with the waste material or soil material underlying the waste material and solidifies to form a discrete horizontal liner at the bottom of the waste impoundment while leaving the soil material or waste material in place;
- and
- constructing a low permeability vertical containment wall at the perimeter of the impoundment.
A system for hydraulically isolating waste material from ground water by a low permeability hydraulic barrier between the waste material and the ground water utilizing in place soil material or waste material, comprising:
- a machine for vertically penetrating the waste material to a desired depth, wherein the desired depth comprises an area selected to construct the low permeability hydraulic barrier which isolates the waste material from the ground water;
- and
- a machine configured to apply a cementitious grout at the desired depth so that the cementitious grout can mix in situ with the waste material or soil material underlying the waste material,
- whereby a low permeability hydraulic barrier can be formed in situ between the waste material and the ground water while leaving the soil material or waste material in place.
Dependencies are inferred from the claim text.