Centrifuge tests to assess seismic site response of partially saturated sand layers
نویسندگان
چکیده
منابع مشابه
Distribution of colloid particles onto interfaces in partially saturated sand.
Colloids have long been known to facilitate the transport of contaminants in soils, but few direct observations have been made of transport and retention in unsaturated porous media. Studies have typically been limited to evaluation of column breakthrough curves, resulting in differing and sometimes conflicting proposed retention mechanisms. We carried out pore scale visualization studies of co...
متن کاملDistribution of Colloid Particles onto Interfaces in Partially Saturated Sand
Colloids have long been known to facilitate the transport of contaminants in soils, but few direct observations have been made of transport and retention in unsaturated porous media. Studies have typically been limited to evaluation of column breakthrough curves, resulting in differing and sometimes conflicting proposed retention mechanisms. We carried out pore scale visualization studies of co...
متن کاملElasticity of partially saturated frozen sand (short note)
Seasonal thawing and freezing of near-surface sediments significantly affect the interpretation of seismic reflection surveys and vertical seismic profiling, as well as activity on the surface. Permafrost covers much of the Earth’s colder regions and is also subject to periodic thawing and freezing. The significance of the regions with large seasonal temperature variations for exploration and e...
متن کاملSeismic Attenuation in Partially Saturated Dime-shaped Cracks
We have examined the effect of surface contamination on the attenuation and stiffness of compressional seismic waves in artificial cylindrical glass cracks that are partially saturated with water. The compression of the gap perpendicularly to its plane reduces the gap volume and forces the water to redistribute within the gap (conservation of volume of an incompressible liquid). On clean surfac...
متن کاملEstimating seismic velocities at ultrasonic frequencies in partially saturated rocks
Seismic velocities in rocks at ultrasonic frequencies depend not only on the degree of saturation but also on the distribution of the fluid phase at various scales within the pore space. Two scales of saturation heterogeneity are important: (1) saturation differences between thin compliant pores and larger stiffer pores, and (2) differences between saturated patches and undersaturated patches a...
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ژورنال
عنوان ژورنال: Soil Dynamics and Earthquake Engineering
سال: 2017
ISSN: 0267-7261
DOI: 10.1016/j.soildyn.2017.01.024