Innovative subsurface stabilization project -- Final Report

Loomis, G.G.; Zdinak, A.P.; Bishop, C. W.

doi:10.2172/578524

Cited by 2 publications

(7 citation statements)

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“…The "soil pit" in the region to be grouted was undisturbed soil except for boreholes to introduce tracer material (molybdenum powder as a stand-in for mercuric oxide). Tracer material was introduced in boreholes corresponding to holes 3,9,11,17,19,27, 25 in a nominally 6-ft zone as shown on Table 1 ( Figure 14 shows the hole numbers). A total of 50.86 kg of pure molybdenum powder was added in equal amounts in 7 holes.…”

Section: M93 Rm03mentioning

confidence: 99%

“…However, because returns were excessive and original objectives for depth could not be achieved due to a particularly hard clay layer below 15 ft (even 8,13,15,11,9,5,7,14,16,12,10 Tracarlnholm 6,13,15 SamplingInhokm 6,8,13,15,9,7,16,10 Figure 21. Grouting with the CASA GRANDE C8 drilling system ii I 2,15,18, 19,22,23,14, Tracer in holes 3,9,11,17,27 Sampling in holes 1,18,19,22 Soil pit (Phase-2 testing) (Graphic M98 0005).…”

Section: Phase-2 Testingmentioning

confidence: 99%

“…However, with the DAVY KENT drilling system, even in the relatively loose soils of the debris pi~it took excessive time to drill, resulting in excess drilling fluid pouring from the hole. Nevertheless, using the 4s per step interval, a series of four adjacent holes (1,2,3, and 4 on the thrust blockaee Figure 20) were grouted in the soil part of the debris pit with encouraging results. The amount of grout returns for drilling all four holes within a single joist of a thrust block did not fill the joist under the holes being grouted nor was there an excessive amount of grout collected under other joists (presumably by drainage through leakage paths caused by the imperfect seal between the thrust block joists and the sublayer of pea gravel).…”

Section: Etieet Of Soil Type On Groutabilitymentioning

confidence: 99%

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Acid Pit Stabilization Project (Volume 1 - Cold Testing) and (Volume 2 - Hot Testing)

Loomis¹,

Zdinak²,

Ewanic³

et al. 1998

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During the summer of Fiscal Year 1997, a Comprehensive Environmental Response, Compensation, and Liability Act Treatability Study was performed at the Idaho National Engineering and Environmental Laboratory. The study involved subsurface stabilization of a mixed waste contaminated soil site called the Acid Pit using jet grouting of an innovative grouting material to form a monolith out of the contamination zone. The monolith simultaneously provides a barrier to further contaminant migration and closes voids in the soil structure against fi.uther subsidence. The grout used for this study was TECT-HG, a relatively dense iron oxide-based cementitious grout. The treatability study involved both cold testing in simulated soil pits followed by in situ stabilization of the Acid Pit at the INEEL's Waste Area Group 7 Subsurface Disposal Area. This report (volume 1) discusses the results of the cold testing phase of this project, and Volume 2 gives the results of the Acid Pit stabilization. Cold testing included field trials in which single and multiple connected columns were created by the jet-grouting action. In addition, several different simulated soil pits were grouted using tracer material to simulate actual contaminants that exist in the Acid Pit. Drilling equipment was specially rigged to reduce the spread of contamination, and all grouting was performed under a concrete thrust block with void space to absorb any grout returns. Data included evaluation of the grouting parameters of drill rotation rate, time at a step, grout injection pressure, grout material parameters such as vismsity, and step size. In addition, the spread of the tracer material (molybdenum powder) as a stand-in for the actual main contaminant (mercury) in the Acid Pit during grouting was evaluated by taking both air samples and surface smears. Other implementability data included thrust block reusability, grout column development and connectivenem, and grout/soil mixing.

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Section: M93 Rm03mentioning

confidence: 99%

Section: Phase-2 Testingmentioning

confidence: 99%

Section: Etieet Of Soil Type On Groutabilitymentioning

confidence: 99%

See 1 more Smart Citation

Acid Pit Stabilization Project (Volume 1 - Cold Testing) and (Volume 2 - Hot Testing)

Loomis¹,

Zdinak²,

Ewanic³

et al. 1998

View full text Add to dashboard Cite

show abstract

“…Approximately 70 gal of grout was injected at each grouting center. A more detailed description of the grouting methods can be found in Innovarive Subsu@ace Stabilization Roject-Final Report (Loomis 1996).…”

Section: Jet Groutingmentioning

confidence: 99%

“…Some cored intervals showed grout penetration; others were relatively untouched by the grout. More information on the drilling and grouting can be found in Innovative Subsqface Stabilization Project-Final Report (Loomis 1996).…”

Section: Core Drillingmentioning

confidence: 99%