Displacements of bridge foundations on sedimentary soft rock: A case study on small-strain stiffness

Izumi, Koichiro; Ogihara, M.; Kameya, Hiroshi

doi:10.1680/geot.1997.47.3.619

Cited by 7 publications

(2 citation statements)

References 3 publications

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“…Several permanent nuclear storage projects plan to (Brookins, 1976; Vomvoris et al., 2013) or already employ (Aik & Sundell, 2014) mudstones as the host rock for both high‐ and low‐grade radioactive waste. Due to their global abundance (Garrels & Mackenzie, 1969), civil infrastructure projects such as tunnels, dams, and bridges often directly interact with mudstones (Izumi et al., 1998; Yoshida et al., 1997; Wang et al., 2013), presenting a variety of engineering challenges. Furthermore, the presence of shales and mudstones is an important input to susceptibility maps for environmental damage due to landslides (Ayalew & Yamagishi, 2005).…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion

et al. 2020

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Using active ultrasonic source survey data, coda wave decorrelation (CWD) time‐lapse imaging during the triaxial compression of Whitby Mudstone cores provides a 3‐D description of the evolution and redistribution of inelastic strain concentrations. Acoustic emissions (AEs) monitoring is also performed between any two consecutive surveys. From these data, we investigate the impact of initial water saturation Sw on the onset, growth, and reactivation of inelastic deformation, compared to the postdeformation fracture network extracted from X‐ray tomography scans. Our results indicate for the applied strain rate and degree of initial water saturation, and within the frequency range of our ultrasonic transducers (0.1 to 1 MHz), that inelastic strain localization and propagation in the Whitby Mudstone does not radiate AEs of sufficient magnitude to be detected above the average noise level. This is true for both the initial onset of inelasticity (strain localization) and during macroscopic failure. In contrast, the CWD results indicate the onset of what is interpreted as localized regions of inelastic strain at less than 50% of the peak differential stress the Whitby Mudstone can sustain. The seemingly aseismic nature of these clay‐rich rocks suggests the gradual development of inelastic strain, from the microscopic diffuse damage, up until the macroscopic shear failure.

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Section: Introductionmentioning

confidence: 99%

Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion

et al. 2020

View full text Add to dashboard Cite

show abstract

“…Several permanent nuclear storage projects plan to (Brookins, 1976;Vomvoris et al, 2013) or already employ (Aik & Sundell, 2014) mudstones as the host rock for both high-and low-grade radioactive waste. Due to their global abundance (Garrels & Mackenzie, 1969), civil infrastructure projects such as tunnels, dams, and bridges often directly interact with mudstones (Izumi et al, 1998;Yoshida et al, 1997;Wang et al, 2013), presenting a variety of engineering challenges. Furthermore, the presence of shales and mudstones is an important input to susceptibility maps for environmental damage due to landslides (Ayalew & Yamagishi, 2005).…”

Section: Introductionmentioning

confidence: 99%

Ultrasonic Imaging of the Onset and Growth of Fractures within Partially Saturated Whitby Mudstone using Coda-Wave Decorrelation Inversion

Zotz-wilson

Douma

Sarout

et al. 2020

Preprint

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Using active ultrasonic source survey data, coda wave decorrelation (CWD) time-lapse imaging during the triaxial compression of Whitby Mudstone cores provides a 3-D description of the evolution and redistribution of inelastic strain concentrations. Acoustic emissions (AEs) monitoring is also performed between any two consecutive surveys. From these data, we investigate the impact of initial water saturation S w on the onset, growth, and reactivation of inelastic deformation, compared to the postdeformation fracture network extracted from X-ray tomography scans. Our results indicate for the applied strain rate and degree of initial water saturation, and within the frequency range of our ultrasonic transducers (0.1 to 1 MHz), that inelastic strain localization and propagation in the Whitby Mudstone does not radiate AEs of sufficient magnitude to be detected above the average noise level. This is true for both the initial onset of inelasticity (strain localization) and during macroscopic failure. In contrast, the CWD results indicate the onset of what is interpreted as localized regions of inelastic strain at less than 50% of the peak differential stress the Whitby Mudstone can sustain. The seemingly aseismic nature of these clay-rich rocks suggests the gradual development of inelastic strain, from the microscopic diffuse damage, up until the macroscopic shear failure.

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Numerical modeling and computer codes

Zhang,

Zhang

et al. 2024

Design of Deep Braced Excavation in Urban Geotechnical Environments

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Displacements of bridge foundations on sedimentary soft rock: A case study on small-strain stiffness

Cited by 7 publications

References 3 publications

Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion

Ultrasonic Imaging of the Onset and Growth of Fractures Within Partially Saturated Whitby Mudstone Using Coda Wave Decorrelation Inversion

Ultrasonic Imaging of the Onset and Growth of Fractures within Partially Saturated Whitby Mudstone using Coda-Wave Decorrelation Inversion

Numerical modeling and computer codes

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