Joint Frequency in the Rock Mass Rating 2014 Classification System Based on Field P-wave Propagation Velocity Tests: A New Rating Method

Liu, Jun; Dai, Guoliang; Gong, Weiming

doi:10.1007/s10706-021-01777-0

Cited by 2 publications

(1 citation statement)

References 20 publications

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“…Nowadays, applications of nondestructive method such as ultrasonic wave velocities have increased progressively in geotechnical projects (Wang et al 2020;Heidari et al 2020;Liu et al 2021). These methods are performed to obtain direct information of rock quality and other physical -dynamic and geodynamic parameters.…”

Section: Introductionmentioning

confidence: 99%

Development of a New Empirical Relation to Assess P-wave Velocity Anisotropy of Rocks

Moomivand

Nikrouz

et al. 2021

Geotech Geol Eng

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Wave velocity as a simple nondestructive method is used for various applications in geotechnical engineering. Several physical parameters and anisotropy related to rock textural arrangements, schistosity and weakness planes such as cracks and joints affect the P-wave velocity (VP). First, VP anisotropy of quartz-mica schist as a common type of widespread metamorphic rock was compared with VP anisotropy of jointed homogeneous limestone specimens to clarify effect of these two different types of anisotropies. The results showed that the VP anisotropy of quartz-mica schist texture is stronger than the VP anisotropy of jointed limestone, because all body of quartz-mica schist specimens have VP anisotropy behavior. Many rocks are anisotropic and degree of anisotropy varies from one rock to another.Several investigations have been carried out on VP anisotropy but there is not a unique comprehensive relation to represent the influence of different degrees of anisotropy on the VP for different rocks. The relation between VP and angle () between the axis of symmetry (perpendicular to weakness planes) with the wave propagation direction was analyzed for a wide range of anisotropy degree using the results of nine different types of rocks including: Angouran quartz-mica schist, Golgohar mica schist, amphibole schist, mica-quart schist, Marcellus shale, Withby shale WUK47B, WUK70 and WUK2, and Veroia-Polymylos gneiss. A new simple empirical relation fitted to all groups of results was obtained to assess VP for different degrees of anisotropies with a good correlation of determination (R 2 = 0.937), low RMSE (RMSE = 320 m/s) and low CV (CV = 7.0%). P wave velocity anisotropy can simply be predicted by the developed relation using only two parameters of VP0 and VP90. A VP anisotropy classification diagram was also developed based on the different values of .

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Section: Introductionmentioning

confidence: 99%

Development of a New Empirical Relation to Assess P-wave Velocity Anisotropy of Rocks

Moomivand

Nikrouz

et al. 2021

Geotech Geol Eng

View full text Add to dashboard Cite

show abstract

Development of a New Empirical Relation to Assess P-wave Velocity Anisotropy of Rocks

Moomivand

Nikrouz

et al. 2021

Preprint

View full text Add to dashboard Cite

Wave velocity as a simple nondestructive method is used for various applications in geotechnical engineering. Several physical parameters and anisotropy related to rock textural arrangements, schistosity and weakness planes such as cracks and joints affect the P-wave velocity (VP). First, VP anisotropy of quartz-mica schist as a common type of widespread metamorphic rock was compared with VP anisotropy of jointed homogeneous limestone specimens to clarify effect of these two different types of anisotropies. The results showed that the VP anisotropy of quartz-mica schist texture is stronger than the VP anisotropy of jointed limestone, because all body of quartz-mica schist specimens have VP anisotropy behavior. Many rocks are anisotropic and degree of anisotropy varies from one rock to another. Several investigations have been carried out on VP anisotropy but there is not a unique comprehensive relation to represent the influence of different degrees of anisotropy on the VP for different rocks. The relation between VP and angle (θ) between the axis of symmetry (perpendicular to weakness planes) with the wave propagation direction was analyzed for a wide range of anisotropy degree using the results of nine different types of rocks including: Angouran quartz-mica schist, Golgohar mica schist, amphibole schist, mica-quart schist, Marcellus shale, Withby shale WUK47B, WUK70 and WUK2, and Veroia-Polymylos gneiss. A new simple empirical relation fitted to all groups of results was obtained to assess VP for different degrees of anisotropies with a good correlation of determination (R2 = 0.937), low RMSE (RMSE = 320 m/s) and low CV (CV = 7.0%). P wave velocity anisotropy can simply be predicted by the developed relation using only two parameters of VP0 and VP90. A VP anisotropy classification diagram was also developed based on the different values of ε.

show abstract

Joint Frequency in the Rock Mass Rating 2014 Classification System Based on Field P-wave Propagation Velocity Tests: A New Rating Method

Cited by 2 publications

References 20 publications

Development of a New Empirical Relation to Assess P-wave Velocity Anisotropy of Rocks

Development of a New Empirical Relation to Assess P-wave Velocity Anisotropy of Rocks

Development of a New Empirical Relation to Assess P-wave Velocity Anisotropy of Rocks

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