scholarly journals Integrated surface-subsurface water and solute modeling of a reclaimed in-pit oil sands mine: Effects of ground freezing and thawing

2022 ◽  
Vol 39 ◽  
pp. 100975
Author(s):  
Ranjeet M. Nagare ◽  
Young-Jin Park ◽  
Rob Wirtz ◽  
Dallas Heisler ◽  
Glen Miller
Keyword(s):  
Oil Sands ◽  
Subsurface Water ◽  
Freezing And Thawing ◽  
Ground Freezing

Ground sampling program at the CANLEX test sites

2000 ◽  
Vol 37 (3) ◽  
pp. 530-542 ◽  
Author(s):  
C E (Fear) Wride ◽  
B A Hofmann ◽  
D C Sego ◽  
H D Plewes ◽  
J -M Konrad ◽  
...  
Keyword(s):  
Oil Sands ◽  
Large Diameter ◽  
Mining Industry ◽  
Soil Liquefaction ◽  
Natural Sand ◽  
Geophysical Logging ◽  
Ground Freezing ◽  
Soil Deposits ◽  
Rock Mining ◽  
Fraser River Delta

One of the primary objectives of the Canadian Liquefaction Experiment (CANLEX) project was to develop and evaluate undisturbed sampling techniques as part of the overall goal to focus and coordinate Canadian geotechnical expertise on the topic of soil liquefaction. Six sites were selected by the CANLEX project in an attempt to characterize various deposits of loose sandy soil. The sites consisted of a variety of soil deposits, including hydraulically placed sand deposits associated with the oil sands industry, natural sand deposits in the Fraser River Delta, and hydraulically placed sand deposits associated with the hard-rock mining industry. At each site, a target zone was selected and various methods of ground sampling were performed. These included ground freezing and sampling, fixed piston tube sampling, Christensen double-tube core sampling, large-diameter sampling using the Laval sampler, and sonic (rotary-vibratory) continuous coring. Ground freezing and sampling was performed at all six sites; the other methods were used at only some sites. Geophysical (gamma-gamma) logging was also performed in boreholes near the freeze pipe to independently measure in situ void ratios. This paper describes the techniques used in the ground-freezing and various sampling programs and presents a summary of the results. Comparisons of void ratios measured for various types of samples and using geophysical logging are also made.Key words: CANLEX, ground freezing, sampling, geophysical logging, void ratio.

Ice lens formation at a silt–sand interface

1995 ◽  
Vol 32 (3) ◽  
pp. 488-495 ◽  
Author(s):  
Sharon L. Smith ◽  
Peter J. Williams
Keyword(s):  
Soil Structure ◽  
Frozen Soil ◽  
Frost Heave ◽  
Controlled Environment ◽  
Freezing And Thawing ◽  
Ground Freezing ◽  
Residual Deformations ◽  
Cumulative Residual ◽  
Lens Formation ◽  
Soil Interface

A major experiment simulating ground freezing around a buried chilled pipeline in a controlled-environment facility provided an opportunity to examine the form and orientation of ice lenses associated with a vertical interface between silt and sand. The heave of the silt decreased towards the interface and ice lenses in the silt were found to dip at an increasing angle in the same direction. Consideration of the thermal regime suggests that the direction of heat flow influences the orientation of the lenses. The interface was irregular and ice lenses at the lower part of the interface were closely aligned to it, indicating that changes in soil texture also influence ice lens orientation. Deformation of ice lenses appears to have occurred in the silt near to the interface. The arrangement of the lenses can be explained by the different thermal properties and thermodynamic behaviour of the two materials and by the mechanical "anchorage" of the sand in which there is no ice lens formation. Cycles of freezing and thawing modify soil structure and produce cumulative residual deformations which are modified by a soil interface. Key words : frost heave, ice lenses, frozen soil, vertical silt–sand interface, chilled pipeline, differential heave.

The effect of freezing and thawing on the dewatering of oil sands sludges

1989 ◽  
Vol 1989 (1) ◽  
pp. 687-694
Author(s):  
R. L. Johnson ◽  
P. Bork ◽  
P. Layte
Keyword(s):  
Oil Sands ◽  
Freezing And Thawing

Laboratory Test of Uniaxial Compressive Strength of Shanghai Frozen Soils under Freeze-Thaw Cycle

2013 ◽  
Vol 716 ◽  
pp. 688-692 ◽  
Author(s):  
Xiang Dong Hu ◽  
Jin Tai Wang ◽  
Xing Fu Yu
Keyword(s):  
Soft Soil ◽  
Underground Space ◽  
Freezing And Thawing ◽  
Frozen Soils ◽  
Freeze Thaw ◽  
Thaw Cycle ◽  
Ground Freezing ◽  
Freeze Thaw Cycle ◽  
Artificial Ground Freezing ◽  
Mechanical Characters

The artificial ground freezing (AGF) is now widely employed in constructions with the expanding underground space exploitation in Shanghai. In order to avoid geological disasters which might appear in the AGF practice, it is urgently needed to do laboratory tests on the physical and mechanical characters of Shanghai soft soil under freezing and thawing action. This paper tests three kinds of soils from the location ofShanghai Metro line 4 constructions in different state, i.e. original state, freeze-thaw state and secondary freeze-thaw state, and obtains the changing rules of soil characters under secondary freeze-thaw action.

Seasonal Ground Freezing and Thawing Monitoring Using Piezoceramic Based Smart Aggregates

2015 ◽  
Author(s):  
Qingzhao Kong ◽  
Ruolin Wang ◽  
Zhaohui “Joey” Yang ◽  
Yuqian Wu ◽  
Gangbing Song
Keyword(s):  
Freezing And Thawing ◽  
Ground Freezing

scholarly journals Characteristics of ground freezing and thawing under snow cover based on long-term observation

2009 ◽  
Vol 71 (4) ◽  
pp. 241-251
Author(s):  
Yusuke HARADA ◽  
Fujio TSUCHIYA ◽  
Kazuo TAKEDA ◽  
Toshimi MUNEOKA
Keyword(s):  
Snow Cover ◽  
Freezing And Thawing ◽  
Ground Freezing ◽  
Long Term Observation

scholarly journals GEOtop 2.0: simulating the combined energy and water balance at and below the land surface accounting for soil freezing, snow cover and terrain effects

2013 ◽  
Vol 6 (4) ◽  
pp. 6279-6341 ◽  
Author(s):  
S. Endrizzi ◽  
S. Gruber ◽  
M. Dall'Amico ◽  
R. Rigon
Keyword(s):  
Snow Cover ◽  
Land Surface ◽  
Three Dimensional ◽  
Soil Surface ◽  
Soil Freezing ◽  
Subsurface Water ◽  
Energy Budgets ◽  
Small Scale ◽  
Freezing And Thawing ◽  
Linear Interaction

Abstract. GEOtop is a small-scale grid-based simulator that represents the heat and water budgets at and below the soil surface. It represents the energy exchange with the atmosphere, considering the radiative and turbulent fluxes, and describes the three-dimensional subsurface water flow. Furthermore, it reproduces the highly non-linear interaction of the water and energy balance during soil freezing and thawing, and describes the temporal evolution of water and energy budgets in the snow cover and their effect on soil temperature. Here, we describe the core components of GEOtop 2.0 and demonstrate its functioning. Based on a synthetic simulation, we show that the interaction of processes represented in GEOtop 2.0 can result in phenomena that are significant and relevant for applications involving permafrost and seasonally-frozen soils, both in high altitude and latitude regions.

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