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Methods and system for subsurface stabilization using jet grouting

Patent ·
OSTI ID:872642
 [1];  [2];  [1];  [1];  [1]
  1. Idaho Falls, ID
  2. Iona, ID
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Methods and systems are provided for stabilizing a subsurface area such as a buried waste pit for either long term storage, or interim storage and retrieval. A plurality of holes are drilled into the subsurface area with a high pressure drilling system provided with a drill stem having jet grouting nozzles. A grouting material is injected at high pressure through the jet grouting nozzles into a formed hole while the drill stem is withdrawn from the hole at a predetermined rate of rotation and translation. A grout-filled column is thereby formed with minimal grout returns, which when overlapped with other adjacent grout-filled columns encapsulates and binds the entire waste pit area to form a subsurface agglomeration or monolith of grout, soil, and waste. The formed monolith stabilizes the buried waste site against subsidence while simultaneously providing a barrier against contaminate migration. The stabilized monolith can be left permanently in place or can be retrieved if desired by using appropriate excavation equipment. The jet grouting technique can also be utilized in a pretreatment approach prior to in situ vitrification of a buried waste site. The waste encapsulation methods and systems are applicable to buried waste materials such as mixed waste, hazardous waste, or radioactive waste.

Research Organization:
Idaho National Engineering and Environmental Laboratory, Idaho Falls, ID
DOE Contract Number:
AC07-94ID13223
Assignee:
Lockheed Martin Idaho Technologies Company (Idaho Falls, ID)
Patent Number(s):
US 5980446
OSTI ID:
872642
Country of Publication:
United States
Language:
English

References (2)

Innovative grout/retrieval demonstration final report report January 1995
Innovative subsurface stabilization project -- Final Report report November 1996

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Related Subjects

/588/405/
adjacent
agglomeration
applicable
approach
appropriate
barrier
binds
buried
buried waste
column
columns
contaminate
desired
drill
drilled
drilling
encapsulates
encapsulation
encapsulation method
entire
equipment
excavation
form
formed
grout
grout-filled
grouting
hazardous
hazardous waste
holes
injected
interim
interim storage
jet
left
material
materials
methods
migration
minimal
mixed
mixed waste
monolith
nozzles
overlapped
permanently
pit
plurality
predetermined
predetermined rate
pressure
pretreatment
prior
provided
providing
radioactive
radioactive waste
rate
retrieval
retrieved
returns
rotation
simultaneously
simultaneously providing
site
situ
situ vitrification
soil
stabilization
stabilized
stabilizes
stabilizing
storage
subsidence
subsurface
systems
technique
term
term storage
translation
utilized
vitrification
waste
waste material
waste materials
waste site
withdrawn