Application of Shear Wave Velocity to Rock Rippability Estimates Based on Poisson’s Ratios Determined from Laboratory and Field Measurements

IFCEE 2021 ◽  
2021 ◽  
Author(s):  
Salman Rahimi ◽  
Clinton M. Wood ◽  
Rendon Rieth ◽  
Ashraf Kamal Himel
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Field Measurements ◽  
Poisson's Ratios ◽  
Poisson’S Ratios

Shear wave velocity as a geotechnical parameter: an overview

2016 ◽  
Vol 53 (2) ◽  
pp. 252-272 ◽  
Author(s):  
Mahmoud N. Hussien ◽  
Mourad Karray
Keyword(s):  
Grain Size ◽  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Field Measurements ◽  
Confining Pressure ◽  
Standard Penetration Test ◽  
Substantial Impact ◽  
Available N ◽  
Tip Resistance

Shear wave velocity, Vs, is a soil mechanical property that can be advantageously measured in both the field and laboratory under real and controlled conditions. The measured Vs values are customarily used in conjunction with other in situ (e.g., standard penetration test blow count, N-SPT, and cone penetration resistance, qc-CPT) and laboratory (e.g., effective confining pressure, [Formula: see text], and void ratio, e) measurements to establish an abundant number of Vs-based correlations that could later be utilized to augment (in some cases, replace) designated testing. An attempt is made here to present the salient features of some existing widely used correlations to provide the reader with a comprehensive understanding about the nature of these correlations and their applicability in geotechnical engineering practices. It is recognized that the reliability of some of these empirical formulations, still in general use today, has been questioned, as they are characterized by their lack of dependence on stress state and particle characteristics. A new Vs1–(N1)60 (where Vs1 is the stress-normalized shear wave velocity, and (N1)60 is the stress-normalized penetration blow count) correlation that accounts for grain sizes is highlighted by combining a recently published Vs1–qc1 (where qc1 is the stress-normalized cone tip resistance) formulation and available (N1)60–qc1 relationships. The new formulation is applicable to uncemented relatively young Holocene-age soil deposits. The estimated Vs1 values based on the proposed correlation are compared with reliable laboratory and field measurements, and the comparison shows that accounting for grain size of granular soils yields more realistic results regarding the Vs values than when particle size is not considered. The prime effect of grain size was to change the range of possible void ratios, which in turn had a substantial impact on Vs values. Moreover, a new Vs1–(N1)60 chart has been proposed, allowing the practitioner to estimate Vs1 values based on a combination of data including N-SPT, e, grain size, and relative density.

scholarly journals Importance of coherence between geophysical and geotechnical data in dynamic response analysis

2019 ◽  
Vol 92 ◽  
pp. 18007
Author(s):  
Mourad Karray ◽  
Simon-Pierre Tremblay ◽  
Mahmoud N. Hussein ◽  
Mohamed Chekired
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Geophysical Methods ◽  
Field Measurements ◽  
Alternative Methods ◽  
Response Analysis ◽  
Eastern Canada ◽  
Geotechnical Tests

The demand for a precise evaluation of shear wave velocity Vs, is gaining interest in the field of geotechnical engineering due to its importance as a key parameter required to properly evaluate typical characteristics of soils. Nowadays, Vs measurements are performed on the field using different methods, such as SCPT tests and various geophysical methods. However, the effectiveness of these field measurements is not guaranteed and rather depends on how they are analyzed. Furthermore, a proper analysis is critical since the collected data may be used in liquefaction evaluation or earthquake ground response analyses. In these situations, it is recommended to verify the coherence between the obtained geophysical (Vs) and geotechnical (N-SPT, qc-CPT) measurements using alternative methods (e.g., Vs-correlations, H/V method, etc...). In some situations, the correlation between the different measurements makes it easier to unambiguously define seismic wave profiles. In other cases, geophysical and geotechnical tests would provide different resolutions for Vs measurements, an issue that complicates the decision of the practitioner. In this paper, we first demonstrate the importance of the shear-wave velocity in liquefaction potential analysis. A case study performed in eastern Canada is also presented where we show the importance of the method used to calculate Vs profiles (MASW, MMASW).

STUDY ON CORRELATION BETWEEN SHEAR WAVE VELOCITY AND GROUND PROPERTIES FOR GROUND LIQUEFACTION INVESTIGATION OF SILTS

2008 ◽  
Vol 22 (31n32) ◽  
pp. 5705-5710 ◽  
Author(s):  
AILAN CHE ◽  
XIANQI LUO ◽  
JINGHUA QI ◽  
DEYONG WANG
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Ground Surface ◽  
Field Measurements ◽  
Standard Penetration Test ◽  
Triaxial Tests ◽  
Liquefaction Resistance ◽  
N Value ◽  
Ground Liquefaction

Shear wave velocity (V s ) of soil is one of the key parameters used in assessment of liquefaction potential of saturated soils in the base with leveled ground surface; determination of shear module of soils used in seismic response analyses. Such parameter can be experimentally obtained from laboratory soil tests and field measurements. Statistical relation of shear wave velocity with soil properties based on the surface wave survey investigation, and resonant column triaxial tests, which are taken from more than 14 sites within the depth of 10 m under ground surface, is obtained in Tianjin (China) area. The relationship between shear wave velocity and the standard penetration test N value (SPT-N value) of silt and clay in the quaternary formation are summarized. It is an important problem to research the effect of shear wave velocity on liquefaction resistance of saturated silts (sandy loams) for evaluating liquefaction resistance. According the results of cyclic triaxial tests, a correlation between liquefaction resistance and shear wave velocity is presented. The results are useful for ground liquefaction investigation and the evaluation of liquefaction resistance.

scholarly journals A Generic Shear Wave Velocity Profiling Model for Use in Ground Motion Simulation

Geosciences ◽  
2020 ◽  
Vol 10 (10) ◽  
pp. 408
Author(s):  
Yuxiang Tang ◽  
Xinmei Xiang ◽  
Jing Sun ◽  
Yongshan Zhang
Keyword(s):  
Shear Wave ◽  
Ground Motion ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Hazard Analysis ◽  
Field Measurements ◽  
P Wave ◽  
Generic Model ◽  
Earthquake Scenario ◽  
Ground Motion Simulations

This study presents a generic model for constructing shear-wave velocity (VS) profiles for various conditions that can be used for modeling the upper-crustal modification effects in ground motion simulations for seismic hazard analysis. The piecewise P-wave velocity (VP) profiling model is adopted in the first place, and the VS profile model is obtained by combining the VP profiling model and VS/VP model. The used VS/VP model is constructed from various field measurements, experimental data, or CRUST1.0 data collected worldwide. By making the best use of the regionally/locally geological information, including the thickness of sedimentary and crystalline layers and reference VS values at specific depths, the VS profile can be constructed, and thus the amplification behavior of VS for a given earthquake scenario can be predicted. The generic model has been validated by four case studies of different target regions world around. The constructed profiles are found to be in fair agreement with field recordings. The frequency-dependent upper-crustal amplification factors are provided for use in stochastic ground motion simulations for each respective region. The proposed VS profiling model is proposed for region-specific use and can thus make the ground motion predictions to be partially non-ergodic.

scholarly journals Calibrating a new attenuation curve for the Dead Sea region using surface wave dispersion surveys in sites damaged by the 1927 Jericho earthquake

Solid Earth ◽  
2019 ◽  
Vol 10 (2) ◽  
pp. 379-390 ◽  
Author(s):  
Yaniv Darvasi ◽  
Amotz Agnon
Keyword(s):  
Shear Wave ◽  
Wave Velocity ◽  
Shear Wave Velocity ◽  
Dead Sea ◽  
Attenuation Curve ◽  
Surface Wave Dispersion ◽  
Near Surface ◽  
Moderate Seismicity ◽  
Local Point ◽  
The Dead

Abstract. Instrumental strong motion data are not common around the Dead Sea region. Therefore, calibrating a new attenuation equation is a considerable challenge. However, the Holy Land has a remarkable historical archive, attesting to numerous regional and local earthquakes. Combining the historical record with new seismic measurements will improve the regional equation. On 11 July 1927, a rupture, in the crust in proximity to the northern Dead Sea, generated a moderate 6.2 ML earthquake. Up to 500 people were killed, and extensive destruction was recorded, even as far as 150 km from the focus. We consider local near-surface properties, in particular, the shear-wave velocity, as an amplification factor. Where the shear-wave velocity is low, the seismic intensity far from the focus would likely be greater than expected from a standard attenuation curve. In this work, we used the multichannel analysis of surface waves (MASW) method to estimate seismic wave velocity at anomalous sites in Israel in order to calibrate a new attenuation equation for the Dead Sea region. Our new attenuation equation contains a term which quantifies only lithological effects, while factors such as building quality, foundation depth, topography, earthquake directivity, type of fault, etc. remain out of our scope. Nonetheless, about 60 % of the measured anomalous sites fit expectations; therefore, this new ground-motion prediction equation (GMPE) is statistically better than the old ones. From our local point of view, this is the first time that integration of the 1927 historical data and modern shear-wave velocity profile measurements improved the attenuation equation (sometimes referred to as the attenuation relation) for the Dead Sea region. In the wider context, regions of low-to-moderate seismicity should use macroseismic earthquake data, together with modern measurements, in order to better estimate the peak ground acceleration or the seismic intensities to be caused by future earthquakes. This integration will conceivably lead to a better mitigation of damage from future earthquakes and should improve maps of seismic hazard.

Sign in / Sign up

Export Citation Format

Share Document