scholarly journals Artificial ground freezing of a volcanic ash: laboratory tests and modelling

2016 ◽  
Vol 3 (3) ◽  
pp. 141-154 ◽  
Author(s):  
Francesca Casini ◽  
Antonio Gens ◽  
Sebastia Olivella ◽  
Giulia M. B. Viggiani
Keyword(s):  
Laboratory Tests ◽  
Volcanic Ash ◽  
Ground Freezing ◽  
Artificial Ground Freezing

Large-scale laboratory tests on artificial ground freezing under seepage-flow conditions

Géotechnique ◽  
2012 ◽  
Vol 62 (3) ◽  
pp. 227-241 ◽  
Author(s):  
E. PIMENTEL ◽  
A. SRES ◽  
G. ANAGNOSTOU
Keyword(s):  
Laboratory Tests ◽  
Large Scale ◽  
Seepage Flow ◽  
Flow Conditions ◽  
Ground Freezing ◽  
Artificial Ground Freezing

Properties of Frozen Soils for Cross Passage Construction in Line 1 and 2 of Wuxi Metro

2013 ◽  
Vol 353-356 ◽  
pp. 1662-1665 ◽  
Author(s):  
Xiang Dong Hu ◽  
Yan Guang Han
Keyword(s):  
Mechanical Properties ◽  
Laboratory Tests ◽  
Freezing Point ◽  
Frozen Soil ◽  
Frost Heave ◽  
Soil Test ◽  
Frozen Soils ◽  
Freezing Method ◽  
Ground Freezing ◽  
Artificial Ground Freezing

Artificial ground freezing method (AGF) was applied in cross passage constructing of line 1 and 2 of Wuxi Metro. Mechanical properties of frozen soils such as uniaxial compressive strength, modulus of elasticity, Poissons Ratio, frost heave rate and freezing point are prerequisite for design and construction of AGF. In order to obtain the parameters mentioned, laboratory tests were conducted. One was the basic geotechnical test. Another was the frozen soil test.

Effect of Freeze Pipe Eccentricity in Artificial Ground Freezing Applications

2020 ◽  
Author(s):  
Ahmad F. Zueter ◽  
Minghan Xu ◽  
Mahmoud A. Alzoubi ◽  
Agus P. Sasmito
Keyword(s):  
Energy Consumption ◽  
Radiation Heat Transfer ◽  
Conservation Equation ◽  
Underground Mines ◽  
Phase Front ◽  
Two Phase ◽  
Ground Freezing ◽  
Deep Underground ◽  
Artificial Ground Freezing ◽  
Conjugate Model

Abstract Building concentric tubes is one of biggest practical challenges in the construction of freeze-pipes of artificial ground freezing (AGF) applications for deep underground mines. In this study, the influence of tubes eccentricity on phase-front expansion (i.e., expansion of the frozen body) and energy consumption of AGF systems is analyzed. A 1+1D semi-conjugate model that solves two-phase transient energy conservation equation is derived. The model is firstly validated against experimental data and then verified with a fully-conjugate model from the literature. After that, the model is extended to a field scale of typical deep underground mines to study freeze-pipe eccentricity. The results show that an eccentric freeze pipe can reduce the phase-front expansion by around 25%, as compared with a concentric one. Also, the geometrical profile of the phase-front is significantly influenced by the freeze-pipe eccentricity. Furthermore, in the passive zone, where AGF coolants are isolated from the ground to reduce energy consumption, freeze pipe eccentricity can increase the coolant heat gain by 10%. This percentage can increase up to 200% if radiation heat transfer is minimized.

Temporary Tunnel Support by Artificial Ground Freezing

1978 ◽  
Vol 104 (10) ◽  
pp. 1257-1276
Author(s):  
John S. Jones ◽  
Ralph E. Brown
Keyword(s):  
Tunnel Support ◽  
Ground Freezing ◽  
Artificial Ground Freezing
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