... combinations of lateral stress and loading rate resulted in the strain at tensile failure ranging widely from around 1% to more than 20%. This variety of ductility has a significant bearing on artificial ground freezing design. An interpretation framework adopting a delayed tensile-degradation concept...

... Ltd 2023 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...

... creep failure starts. This novel constitutive model proves to be a powerful numerical tool for predicting the stability and evaluating the deformations of frozen soils in engineering applications. Since existing analytical solutions for ground freezing applications are insufficient to design frozen...

.../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...

... deformation ground freezing laboratory tests stiffness Urban underground work, typically tunnel or shaft excavation and foundation underpinning, is generally designed and executed with very small ground movement tolerances. Artificial ground freezing (AGF) is one of the options available to achieve...

... phenomena as the multi-stage pressure dependency of the frozen strength, originally noted by Chamberlain and co-workers in 1972, are shown to be described generally well for clays and sands. ground freezing shear strength temperature effects Frozen soils have many favourable engineering...

... were checked before and after the completion of the test. 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...

... Telford Ltd 2018 clays consolidation ground freezing permeability silts temperature effects Freeze–thaw cycles are seasonal natural processes occurring in the shallow soils in northern regions, but in some geotechnical applications they could be artificially induced in the ground...

... of physical variables of soil during tests. The variables of temperature and pore water pressure are obtained directly using thermocouples and tensiometers, but dry density, water content and ice content must be obtained from combinations of measurement techniques. ground freezing model tests partial...

...) and the equivalent vapour content θ_v (m³/m^{3); and t is the time (s). ground freezing laboratory tests numerical modelling water flow Airfield runways in an airport in north-western China were reported to have experienced significant frost heave damage}...

... railway embankment and mechanism of pumping-enhanced frost heave embankments ground freezing numerical modelling pore pressures snow ice and frost Fig. 2. Grain-size distributions of: (a) high-speed embankment fills; (b) subgrade soil Table 1. Frost susceptibility...

...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...

... actuelle correspondent bien aux cartes 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...

... déterminée par la migration de l'eau. ground freezing numerical modelling temperature effects water flow Freezing and thawing of pore fluid within soils involves complex thermal, hydraulic and mechanical processes that can have significant mutual geotechnical interactions. For example, phase...

... 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 is often accompanied by frost heave and ice segregation...

... of the CANLEX project was to develop the process of in-situ ground freezing to obtain undisturbed specimens of sand with a view to testing whether the tailings were potentially dilative or contractive. Undisturbed sampling of sands has long been recognised as a difficult process, and laboratory testing has thus...

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

... are looser and much weaker than those obtained by the in situ freezing method. The reverse is true for very loose sands. The correlation between relative density and normalized N value is fairly good for the in situ frozen samples, but very poor for the tube samples. KEYWORDS: earthquakes; ground freezing...