Relationship between Shear-Wave Velocity and Undrained Shear Strength of Peat

Trafford, Andrew; Long, Michael

doi:10.1061/(asce)gt.1943-5606.0002298

Cited by 18 publications

(2 citation statements)

References 27 publications

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“…Similarly, combing measurements of laboratory-derived or in-situ geotechnical properties (e.g., Trafford and Long, 2020) with seismic measurements can provide relationships between seismic velocities and the stress state of a landslide. Petrophysical joint inversion, where two geophysical datasets are inverted together to provide quantitative estimations of subsurface properties, are also possible when considering multiple co-located geophysical datasets, although this approach does not remove the need for non-geophysical observations to resolve some ambiguities arising in the resulting models (Wagner et al, 2019).…”

Section: Data Elaborationmentioning

confidence: 99%

Brief communication: The role of geophysical imaging in local landslide early warning systems

Whiteley

Watlet

Kendall

et al. 2021

Preprint

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Abstract. We summarise the contribution of geophysical imaging to local landslide early warning systems (LoLEWS), highlighting how LoLEWS design and monitoring components benefit from the enhanced spatial and temporal resolutions of time-lapse geophysical imaging. In addition, we discuss how with appropriate laboratory-based petrophysical transforms, these geophysical data can be crucial for future slope failure forecasting and modelling, linking other methods of remote sensing and intrusive monitoring across different scales. We conclude that in light of ever increasing spatiotemporal resolutions of data acquisition, geophysical monitoring should be a more widely considered technology in the toolbox of methods available to stakeholders operating LoLEWS.

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Section: Data Elaborationmentioning

confidence: 99%

Brief communication: The role of geophysical imaging in local landslide early warning systems

Whiteley

Watlet

Kendall

et al. 2021

Preprint

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“…There are also increasing correlation between the seismic waves (i.e. Vs and Vp) with geotechnical parameters such as undrained shear strength [6][7][8], SPT-N value [9], cone penetration parameters [10][11][12][13], and 1D compression parameters [13,14]. The growing interest of geophysical method application in geotechnical investigation has the advantages of not being affected by sampling disturbance and insertion effects.…”

Section: Introductionmentioning

confidence: 99%

Estimating the Small Strain Stiffness of Peat Soil Using Geophysical Methods

Basri

Zainorabidin

Talib

et al. 2021

IJETS

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Geotechnical design commonly requires that the in-situ stiffness, strength and permeability of the ground be obtained. Laboratory based investigation often related with risk of sample disturbance and difficulties to replicate the in-situ stress condition which results in overestimation or underestimation. Application of geophysical methods in geotechnical investigation previously was limited to targeting and dimensioning sub-surface features due to lack of resolution. However, rapid developments of geophysical methods result in the application of these methods in providing geotechnical design parameters. Multichannel analysis of surface waves (MASW) and seismic refraction were among the geophysical methods capable of obtaining stiffness parameters including the maximum shear modulus (Gmax) and maximum elastic modulus (Emax). The study revealed the efficiency of these methods to measure the small strain stiffness of peat soil with high accuracy as the results obtained were found to be similar to those obtained by previous researchers. Overall, the Gmax and Emax values of peat soil obtained range from 0.49 to 1.72 MPa and 1.46 to 5.15 MPa respectively. The Gmax and Emax values obtained shows significant increase with depth governed primarily by the effective stress. Other parameters such as degree of decomposition and peat thickness also shows potential influence on the Gmax and Emax values obtained.

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