... questions. clays ground freezing strength & testing of materials temperature effects tensile properties Recent underground projects involve complex excavation processes at greater depths reaching 40–50 m more commonly than ever, often adjacent to existing substructures and/or under...

... to be a function of σ 1 and θ constitutive relations creep ground freezing shear strength temperature effects The ground freezing technique has been used for over 150 years in engineering applications to temporarily increase the stiffness and strength of the subsoil and to provide...

.../by/4.0/) © 2021 Thomas Telford Ltd 2021 This is an open-access article distributed under the terms of the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited. compressibility ground...

...V. Santiago Quinteros; J. Antonio H. Carraro High-quality undisturbed samples of fluvial sand were obtained from the field using the ground freezing technique. In the laboratory, the in situ void ratio of these high-quality undisturbed frozen samples was replicated using four different...

...Satoshi Nishimura; Shota Okajima; Bhakta Raj Joshi; Yosuke Higo; Tetsuya Tokoro The volume change behaviour of fine-grained soils under repeated freeze–thaw cycles was investigated in context of artificial ground freezing, in which relatively quick freezing is achieved under confinement. Laboratory...

... to isotropic NCL are not shown for clarity in (b)) 15 05 2018 08 10 2018 © 2018 Thomas Telford Ltd 2018 deformation ground freezing laboratory tests stiffness Urban underground work, typically tunnel or shaft excavation and foundation underpinning, is generally designed...

...; see Parameswaran (1980)), and this expression is not to be extrapolated to extremely low temperature. © 2018 Thomas Telford Ltd 2018 ground freezing shear strength temperature effects Frozen soils have many favourable engineering properties such as greater resistance against...

... and numerical models. 17 08 2017 28 03 2018 © 2018 Thomas Telford Ltd 2018 ground freezing laboratory tests snow ice & frost Moisture accumulation in base materials below impervious pavements has been reported, as a cause of frost damage to highways, airport runways and high...

... of the macroscale hydraulic conductivity are related to changes in the porous microstructural variations, detected in a wide dimensional range by means of a combination of X-ray computed micro tomography, scanning electron microscopy and mercury intrusion porosimetry. clays consolidation ground freezing...

... and soil displacement. 15 05 2015 15 07 2016 © 2016 Thomas Telford Ltd 2016 ground freezing model tests partial saturation pavements & roads suction Increasing interest in the development of thermo-hydro-mechanical numerical models that include changes...

... the possibility of capillary action influencing the water content of the surface soil. The question is then, where is the water in the subgrade soil coming from? ground freezing laboratory tests numerical modelling water flow 8 K v T = D ρ w η H r d ρ...

... engineering practices for mitigating frost heave in cold regions. embankments ground freezing numerical modelling pore pressures snow ice and frost The development of excess pore water pressure under cyclic loads can also be predicted using appropriate elasto-plastic constitutive models...

...E. PIMENTEL; A. SRES; G. ANAGNOSTOU A high seepage-flow velocity represents a potential problem for artificial ground freezing (AGF), as it may hinder the growth of an ice body and the development of a closed ice wall. To avoid such difficulties, careful thermal hydraulic analysis is necessary...

..., ainsi que le traitement des conditions limites de l'interface air/sol. On démontre, avec un bon degré de précision, que la simulation THM reproduit le foisonnement relevé sur le pipeline ainsi que l'augmentation de la porosité déterminée par la migration de l'eau. ground freezing numerical...

... des procédés à mouvements de masse lents relatifs au dégel (solifluction). deformation ground freezing numerical modelling temperature effects In cold regions, the soil near the ground surface may freeze in response to seasonal temperature variations. The soil-freezing process...

... géocryologiques existantes. En outre, on présente également une illustration de la façon dont ces informations permettent de tracer de simples cartes des géorisques. geology ground freezing numerical modelling temperature effects Future climate warming (IPCC, 2007) will result in above-average...

... to have been a sound decision since void ratio changes during thaw and consolidation were of the order of 0·02. With the ground freezing technique outlined above, it is possible to retrieve specimens of a loose sand from the field and test them in the laboratory from an initial state that is very...

...Y. Yoshimi; S. Goto © 1996 Thomas Telford Ltd 1996 earthquakes ground freezing liquefaction sampling sands silts ...

... densité relative et la valeur normalisée N est relativement bonne pour les échantillons congelés in-situ et très mauvaise pour les échantillons carottés. © 1994 Thomas Telford Ltd 1994 earthquakes ground freezing iquefaction repeated loading sands site investigation Yoshimi, Y., Tokhnatsu...