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作者:Yi Lu1 , Zhi Shang , Hamayon Tokhi ...
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:Vapour equilibrium technique (VET) is usually used to determine the water retention curve of soils. It is a suction-controlled technique where the soil specimen is allowed to reach the suction equilibrium in a desiccator where the relative humidity is controlled by a chemical sol...
作者:Kannan K. R Iyer , D. N. Singh
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:Initial state of soil (viz., slurried, intact or compacted state) influences the soil water retention characteristics (SWRC), which in turn affects the unsaturated soil behaviour. Few studies have investigated the effect of initial state of soil on their SWRC, and such studi...
作者:H. Al-Dakheeli , R. Bulut
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:Cracks evolve in expansive soils when subjected to drying and shrinkage processes. The underlining driving mechanism is the development of the tensile stress in perpendicular direction to the crack length. The tensile stresses are generated from the restrictions applied on the so...
作者:Abraham C.F. Chiu , Y. Xiao , B. Qiao
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:Biochar has been used to modify the soil cover of municipal solid waste (MSW) landfill to mitigate methane emission. To model the coupled water and reactive gas transport in unsaturated soil cover, water retention curve and unsaturated permeability function of biochar-modified so...
作者:L. Zou , E.C. Leong
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:Soil-water characteristic curves (SWCCs) can be unimodal or bimodal. However, insufficient SWCC data points may cause a bimodal SWCC to be erroneously interpreted as a unimodal SWCC. Suggested suction levels to determine SWCC in ASTM 6836-02 (2008) are excessive and can be reduce...
作者:J. R. Zhang , D. A. Sun , W. J. Sun
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:The development of constitutive models for unsaturated soils is briefly reviewed, and the state-of-the-art of elastoplastic constitutive models for unsaturated soils is summarized. This paper introduces an elastoplastic model that couples hydraulic and mechanical behaviour for un...
作者:G. G. Carnero-Guzman , F. A. M. Marinho
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:The use of saturation methods in triaxial tests is a common practice to obtain the strength parameters of the soil in effective terms. However, these methods may influence the results obtained in the laboratory negatively. For instance, undesirable volumetric variations in t...
作者:A. Jotisankasa , S. Pramusandi , S. Nishimura ...
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:A field study was undertaken of an instrumented dyke on soft Bangkok clay in Pathumthani, Thailand. The studied site was characterised using dynamic cone penetration tests, field vane shear tests and Spectral Analysis of Surface Waves geophysical tests. The porewater pressure, su...
作者:Y. Liu , S. K. Vanapalli
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:Seasonal volume changes associated with wetting and drying conditions due to infiltration and evaporation of water significantly influence the mechanical behavior of expansive soils. For this reason, rational design of foundations in expansive soils has been a challenge for the g...
作者:R. Kitamura , K. Sako
来源:[J].Geotechnical Engineering Journal of the SEAGS & AGSSEA, 2019, Vol.50 (1)SEAGS
摘要:The basic scheme of microscopic mechanical model is proposed to analyze the various mechanical behaviors of unsaturated coarse-grain soil. Physical quantities required for the proposed model are grain size distribution, soil particle density, void ratio and water content. The pro...

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