Attenuation results in loss of seismic wave intensity over distance and time. Attenuation via viscous dissipation results from relative fluid-solid motion and pressure gradients within the fluid, which is contained in a pore or crack. Here, a classic derivation of dissipative attenuation is summarized and its drawbacks and need for derivations specific to the microscopic scale are explained. Tw...

Piezocone penetration test device imported from the Netherlands was used to conduct pore pressure dissipation tests at 4 measuring points in 2 holes water area of Sutong GIL utility tunnel project. After dissipation, stable analyse groundwater and further obtain height head. This method provides a successful solution for in-situ stratification testing parameters engineering, reliable hydrologic...

excess pore pressure under seismic loadings has always been a main concern in geotechnical engineering practices. the phenomenon in soil can cause an effective stress and hence cause the shear strength of the soil to decrease considerably and large deformations to occur in the area. generally, increases in pore pressure occur in un-drained conditions. if it is formed, its consequences decrease ...

mixed clayey soils occur as mixtures of sand (or gravel) and clay in widely varying proportions. their engineering behavior has not been comprehensively studied yet. an experimental program, comprising monotonic, cyclic, and post-cyclic triaxial tests was undertaken on compacted clay-granular material mixtures, having different proportions of clay and sand or gravel. this paper presents the res...

abstract at present study constant rate of strain (crs) consolidation under non-darcy condition was investigated. in this study a governing conditions of drainage pore water were investigated using proposed equation. the crs experiments under different rates of strain were conducted on different soil samples. results these experiments and there comparison with proposed equation showed that flow...

excess pore pressure under seismic loadings has always been a main concern in geotechnical engineering practices. the phenomenon in soil can cause an effective stress and hence cause the shear strength of the soil to decrease considerably and large deformations to occur in the area. generally, increases in pore pressure occur in un-drained conditions. if it is formed, its consequences decrease ...

Thin films of water in a single pore act as elastic membranes under tension that increase capillary pressures without increasing the dissipated mechanical work. A single wedge-shaped microfluidic pore was fabricated using two-photon laser machining of the photoresist SU-8 to have sharp corners at the pore entrance from the nonwetting reservoir. The singular geometry acts as a strong pinning def...

Large earthquakes occur in rocks undergoing high-pressure/low-temperature metamorphism during subduction. Rhythmic major-element zoning in garnet is a common product of such metamorphism, and one that must record a fundamental subduction process. We argue that rhythmic major-element zoning in subduction zone garnets from the Franciscan Complex, California, developed in response to growth-dissol...