Environment, Vol. 3, Issue 2, Sep  2019, Pages 11-26; DOI: 10.31058/j.envi.2019.32002 10.31058/j.envi.2019.32002

Using Microtremors to Delineate Subsurface Structures in Port Said, North Eastern Egypt

, Vol. 3, Issue 2, Sep  2019, Pages 11-26.

DOI: 10.31058/j.envi.2019.32002

Mohamed A. Gamal 1 , Mohamed H. Khalil 1 , George Maher 1*

1 Geophysics Department, Faculty of Science, Cairo University, Giza, Egypt

Received: 1 August 2019; Accepted: 15 September 2019; Published: 30 September 2019

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Abstract

Port Said power plant is one of the tangible development cornerstones of the Port Said city, Egypt. It produces electricity using turbines and two glasses reinforced plastic pipes (GRPs) for the intake and discharge of water. These pipes (2.3 m diameter) are buried in soft clayey soil at depths of 0.4 m and 4.5 m. In the study area, microtremors were used to delineate the accurate locations of GPR pipes recognized by its resonance frequency. Microtremor is usually used in the field of seismology to detect soil effect (e.g. soil amplification), however in this study it is used to separate subsurface structures. In this context, seven profiles with 70 stations were conducted. In each station, three components (one vertical and two horizontal) where recorded with a 30 second for every file. The processed data revealed 2.5 Hz peak which believed to be the natural vibration frequency of the soft soil. Whereas, 4 Hz and 6.5 Hz reflected the shallow and deep GRP pipes, respectively. 

Keywords

Microtremors, GRP Pipes, Soil Amplification, Vibration Frequency, Port Said Area

Copyright

© 2017 by the authors. Licensee International Technology and Science Press Limited. This article is an open access article distributed under the terms and conditions of the Creative Commons Attribution (CC BY) License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.

References

[1]Adib, A.; Afzal, P.; Heydarzadeh, K. Site effect classification based on microtremor data analysis using a concentration–area fractal model. Nonlinear Processes in Geophysics, 2015, 22, 53-63.

[2]Akkaya, I. The application of HVSR microtremor survey method in Yuksekova (Hakkari) region, Eastern Turkey. Journal of African Earth Sciences, 2015, 109, 87-95.

[3]Bour, M.; Fouissac, D.; Dominique, P; Martin, C. On the use of microtremor recordings in seismic microzonation. Soil Dynamics and Earthquake Engineering, 1998, 17, 465-474.

[4]Bouranta, E.; Vallianatos , F.; Hatzopoulos, J.N.; Papadopoulos, I.; Gaganis, P. Microtrmor HVSR study of site effects in the urban area of the town of mytilene, Lesvos (Greece) – Preliminary results, Bulletin of the Geological Society of Greece, Chania, Sept. 2013, Proceedings of the 13th International Congress, vol. XLVII 2013.

[5]Castro, R.R.; Pacor, F.; Sala, A.; Petrungaro, C.S Wave attenuation and site effects in the region of Friull, Italy. J. Geophysics. Res, 1996, 101, 22355-22369.

[6]Celebi, M.; Dietel, C.; Prince, J.; Onate, M.; Chavez, G. Site amplification in Mexico City (determined from 19 September 1985 strong-motion records and from records of weak motion), in Ground Motion and Engineering Seismology, Amsterdam, 1987, A. S. Cakmak (Editor), Alsevier, pp. 141-152.

[7]Chopra, A.K. Dynamics of structures, a primer Earthquake engineering research institute. Library of Congress Catalog, 1981, card no 81-65052.

[8]Chopra, A.K. Dynamic of structures – Theory and Application to Earthquake Engineering, Englewood Cliffs, New Jersey, 1995.

[9]Diagourtas, D.; Tzanis, A.; Makropoulos, K. Comparative Study of Microtremor Analysis Methods: Pure and Applied Geophysics, 2001,158, 2463-2479.

[10]El-Kady, R.Y.; El-Rayes, A.E.; Sultan, Y.M.; Aziz, A.M. Mapping of Soil Geochemistry in Port Said Governorate, Egypt Utilizing GIS and Remote Sensing Techniques. Imperial Journal of Interdisciplinary Research (IJIR), 2017, 3, 1261-1270.

[11]Egyptian Code. Egyptian code of Practice (ECP-1993) for estimating loads and forces, 1993.

[12]Field, E.H.; Hough, S.E.; Jacob, H. Using microtremors to assess potential earthquake site response, a case study in Flushing Meadows, New York city, Bulletin of the Society of America, 1990, 80(6), 1456-1480.

[13]Harutoonian, P.; Leo, C.J.; Doanh, T.; Castellaro, S.; Zou, J.J.; Liyanapathirana D.S.; Wong H.; Tokeshi K. Microtremor measurements of rolling compacted ground. Soil Dynamics and Earthquake Engineering, 2012, 41, 23-31.

[14]Horike, M. Inversion of phase velocity of long-period microtremors to the S-wave-velocity structure down to the basement in urbanized areas. Journal of Physics of the Earth, 1985, 33, 59-69.

[15]Ishida, H.; Nozawa T.; Niwa, M. Estimation of deep surface structure based on phase velocities and spectral ratios of long period microtremors. In Proceedings of 2nd Int. Symp, on the Effects of Surface Geology on Seismic Motion, Yokohama, Japan, 1998, 2, 697-704.

[16]Jiang, Y.; Gao, Y.; Wu, X. The nature frequency identification of tunnel lining based on the microtremor method. Science direct Underground Space, 2016, 1, 108-113.

[17]Kagami, H.; Duke, C.M.; Liang, G.C.; Ohta, Y. Observation of 1-5 second microtremors and their application to earthquake engineering. Part II. Evaluation of site effect upon seismic wave amplification due to extremely deep soils, Bull. Seism, Soc Am, 1982, 72, 987-998.

[18]Kagami, H.; Okada S.; Shiono K.; Oner M.; Dravinski M.; Mal A.K. Observation of 1-5 seconds microtremors and their application to earthquake engineering. Part III. A two-dimensional of the site effect in San Fernando Valley, Bull. Seism. Soc. Am, 1986, 76, 1801-1812.

[19]Kanai, K. The requisite conditions for predominant vibration of ground: Bull. Earthq. Res. Inst, Tokyo University, 1957, 31, 457.

[20]Kanai, K. On the spectrum of strong earthquake motions. Primeras J. Argentinas Ing. Antisismica, 1962, 24, 1.

[21]Kanai, K.; Tanaka. On microtremors. VII, Bull. Earthq. Res. Inst., Tokyo university, 1961, 39; pp. 97-115

[22]Lermo, J.; Chavez-Garcia, F.J. Site effect evaluation using spectral ratios with only one station, Bull. Seism. Soc. Am, 1993, 83, 1574-1594.

[23]Lermo, J.; Rodriguez, M.; Singh, S.K. Natural periods of sites in the valley of mexico from microtremors measurments and from strong motion data, Earthquake Spectra, The Mexico Earthquake of September 19, 1985: 4, 1988; pp. 805-814.

[24]Mahajan, A.K.; Mundepi, A.K.; Chauhan, N.; Jasrotia, A.S.; Rai, N.; Gachhayat, T.K. Active seismic and passive microtremor HVSR for assessing site effects in Jammu city, NW Himalaya, India, A case study. Journal of Applied Geophysics, 2012, 77, 51-62.

[25]Miyakoshi, K.; Kagawa, T.; Kinoshita, T. Estimation of geological structures under the Kobe area using the array recordings of microtremors. In 2nd Int. Symp. on the Effects of Surface Geology on Seismic Motion, Yokohama, Japan, 1998; pp. 691-696.

[26]Mucciarelli, M. Reliability and applicability of Nakamura’s technique using microtremors an experimental approach, Journal of Earthquake Engineering, 1998, 4, 625-638.

[27]Nakamura, Y. A method for Dynamic Characteristic Estimation of Subsurface using Microtremor on the ground surface. Quarterly Report of RTRI, 30, 1989, no.1, 25-33.

[28]Ridwana, M.; Widiyantoro, S.; Afnimar; Irsyamc, M. Identification of engineering bedrock in Jakarta by using array observations of microtremors, 3rd International Symposium on Earthquake and Disaster Mitigation, Procedia Earth and Planetary Science, 2015, 12, 77-83.

[29]Rogers, A.M.; Borcherdt, R.D.; Covington, P.A.; Perkins, D.M. A comparative ground response study near Los Angeles using recordings of Nevada nuclear tests and the 1971 San Fernando earthquake, Bull. Seism. Soc. Am, 1984, 74, 1925-1949.

[30]Said, R. Geology of Egypt, Published for the Egyptian Petroleum Corporation, Conoco Hurghada Inc. and Repsol Exploration, S. A. by A. A. Baklema, Rotterdam, Brookfiekd, 1990.

[31]Scherbaum, F.; Riepl J.; Bettig, B.; Ohnberger, M.; Cornou, C.; Cotton, F.; Bard, P.Y. Dense array measurements of ambient vibrations in the Grenoble basin to study local site effects. AGU Fall meeting, San Francisco, December 1999.

[32]Schlumberger. Well Evaluation Conference of Egypt. Schlumberger Middle East. 1984.

[33]S-graph 4.8 software, 2008-2013, given and invented by Dr. Mohamed Farouk Abdelwahid, NRIAG work at National Research institute of Astronomy and Geophysics.

[34]Singh, A.P.; Parmar A.; Chopra, S. Microtremor study for evaluating the site response characteristics in the Surat City of western India. Natural Hazards, 2017.

[35]Uniform Building Code UBC, 1985, International Conference of building officials whittier, California.

[36]Yamamoto, H. Estimation of shallow S-wave velocity structures from phase velocities of love and Rayleigh-waves in microtremors: In Proceedings of 12th World Conf, on Earthquake Engineering, Auckland, New Zealand, 2000.

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