IJG  Vol.3 No.4 , September 2012
Correlation of Seismic P-Wave Velocities with Engineering Parameters (N Value and Rock Quality) for Tropical Environmental Study
ABSTRACT
The physical parameters of the subsurface from the environmental site investigation are important for geoscientists and engineers to understand and very low cost-effective method, especially when combined with geophysical (seismic) and geotechnical (borehole) surveys. These parameters can be estimated from other obtained parameters. In this study, P-wave velocities of materials (soils and rocks) are studied both in the laboratory and field measurement. The obtained P-wave velocities are then compared with the engineering parameters such N values, rock quality, friction angle, relative density, velocity index, density and penetration strength from boreholes. The empirical correlations were also found in this study for selected parameters. The estimation of engineering parameters from P-wave seismic velocity values is applicable for tropical environmental study. It is found that, the ratio (VFIELD/VLAB) when squared, was numerically close to the value of percentage RQD. We found that the empirical correlation for tropical environmental study is VP = 23.605(N) - 160.43 and the regression found is 0.9315 (93.15%). Meanwhile, the empirical correlation between P-wave velocities and RQD values is found as VP = 21.951(RQD) + 0.1368 and the regression found is 0.8377 (83.77%). The correlation between apparent P-wave velocities with penetration strength for both study sites are found as and the regression coefficient is found as 0.9756. Thus, this study helps for the estimation and prediction the properties of the subsurface material (soils and rocks) especially in reducing the cost of investigation and increase the understanding of the Earth’s subsurface characterizations physical parameters.

Cite this paper
A. Bery and R. Saad, "Correlation of Seismic P-Wave Velocities with Engineering Parameters (N Value and Rock Quality) for Tropical Environmental Study," International Journal of Geosciences, Vol. 3 No. 4, 2012, pp. 749-757. doi: 10.4236/ijg.2012.34075.
References
[1]   A. A. Bery and R. Saad, “Clayey Sand Soil’s Behaviour Analysis and Imaging Subsurface Structure via Engineering Characterizations and Integrated Geophysicals Tomography Modeling Methods,” International Journal of Geosciences, Vol. 3, No. 1, 2012, pp. 93-104. Hdoi:10.4236/ijg.2012.31011

[2]   S. A. Naeini and M. H. Baziar, “Effect of Fines Content on Steady-State Strength of Mixed and Layered Samples of Sand,” Soil Dynamics and Earthquake Engineering, Vol. 24, No. 3, 2004, pp. 181-187. Hdoi:10.1016/j.soildyn.2003.11.003

[3]   B. O. Hardin, “1-D Strain in Normally Consolidated Cohesionless Soils,” Journal of Geotechnical Engineering Division, Vol. 113, No. 12, 1987, pp. 1449-1467. Hdoi:10.1061/(ASCE)0733-9410(1987)113:12(1449)

[4]   F. A. Chuhan, A. Kjeldstad, K. Bjorlykke and K. Hoeg, “Experimental Compression of Loose Sands: Relevance to Porosity Reduction during Burial in Sedimentary Basins,” Canadian Geotechnical Journal, Vol. 40, 2003, pp. 995-1011. Hdoi:10.1139/t03-050

[5]   F. David, “Essentials of Soil Mechanics and Foundations Basic Geotechnics,” 6th Edition, Pearson Education, Upper Saddle River, 2007.

[6]   B. Vásárhelyi and P. Ván, “Influence of Water Content on the Strength of Rock,” Engineering Geology, Vol. 84, No. 1, 2006, pp. 70-74. Hdoi:10.1016/j.enggeo.2005.11.011

[7]   M. Romana and B. A. Vásárhelyi, “A Discussion on the Decrease of Unconfined Compressive Strength between Saturated and Dry Rock Samples,” Polytechnic University of Valencia, Valencia, 2007.

[8]   W. S. Ong, “The Geology and Engineering Geology of Penang Island,” Geological Survey of Malaysia, 1993.

[9]   H. S. Abieda, Z. Z. T. Harith and A. H. A. Rahman, “Depositional Controls on Petrophysical Properties and Reservoir Characteristics of Middle Miocene Miri Formation Sandstones, Sarawak,” Bulletine of the Geological Society of Malaysia, Vol. 5, 2005, pp. 63-75.

[10]   L. Ouadif, L. Bahi, A. Akhssas, K. Baba and M. Menzhi, “Geophysics Contribution for the Determination of Aquifers with a Case Study,” International Journal of Geosciences, Vol. 3, No. 1, 2012, pp. 117-125. doi:10.4236/ijg.2012.31014

[11]   A. Bery and R. Saad, “Tropical Clayey Sand Soil’s Behaviour Analysis and Its Empirical Correlations via Geophysics Electrical Resistivity Method and Engineering Soil Characterizations,” International Journal of Geosciences, Vol. 3, No. 1, 2012, pp. 111-116. doi:10.4236/ijg.2012.31013

[12]   O. T. Nkereuwem, S. N. Yusuf and M. U. Mijinyawa, “An Integration of Self Potential, Electromagnetic and Resistivity Profiling Methods in the Search for Sulfide Deposits in Gwoza, Borno State, Nigeria,” International Journal of Geosciences, Vol. 3, No. 2, 2012, pp. 365-372. doi:10.4236/ijg.2012.32040

[13]   D. U. Deere and D. W. Deere, “The Rock Quality Designation (RQD) Index in Practice,” In: L. Kirkaldie, Ed., Rock Classification System for Engineering Purposes, ASTM STP 984, American Society for Testing and Materials, Philadelphia, 1988, pp. 91-101. doi:10.1520/STP48465S

[14]   D. U. Deere, A. J. Hendron, F. D. Patton and E. J. Cording, “Design of Surface and Near Surface Construction in Rock. In Failure and Breakage of Rock,” Proceedings of 8th US Symposium Rock Mechanics, Society of Mining Engineers, American Institute of Mining, Metallurgical and Petroleum Engineers (SAUS), New York, 1967, pp. 237-302.

 
 
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