Rezumat/Abstract. Geotechnical and geophysical data acquired from in situ and laboratory tests are crucial for safer constructions and better foundation plans. Accordingly, the geotechnical engineer assumes the responsibility to thoroughly study the site, in order to provide timely and cost-effectively the necessary and sufficient information on the natural features of the site, by predicting the different potential hazards. On the other hand, processing geotechnical and seismic information integrated by geographic information systems is an excellent idea that could help geotechnical engineers reliably predicting geotechnical information and accurately estimating the effects of the site in Alger area. This study represents a scientific contribution aimed at processing a geotechnical database of 144 downhole test surveys. This database is collected and organized in the geotechnical Information system "Géo-Base", which is then integrated into the Geographic Information System software (ArcGIS in the present study), allowing for visualizing the geotechnical maps. Finally, the seismic microzoning maps were constructed using the site period and average shear wave velocity up to 30 m (VS30). These maps were presented as a regional strategy. They will also be very useful for engineers, researchers and builders in future studies to mitigate seismic hazards in the study area by helping them making better decisions and safer and more economical designs.

Cuvinte cheie/Key words: seismic hazards, geographic information systems, downhole tests, microzoning carts, shear wave velocity

DOI: https://doi.org/10.54508/rsdu.2018.02

Bibliografie/References

1. Al-Ani, H. A. H. (2015), Digital Geotechnical Maps and Classification of Soil Engineering Properties by Using GIS, Doctoral Dissertation, Griffith University Gold Coast, Southport, Australia, 2015.
2. Benbouras, M. A., Kettab Mitiche, R., Zedira, H., Petrisor, A.-I., Mezouar, N., Debiche, F. (2018) “A new approach to predict the compression index using artificial intelligence methods” Marine Georesources & Geotechnology, DOI: https://doi.org/10.1080/1064119X.2018.1484533.
3. Benbouras, M. A., Kettab, R. M., Zedira, H., Debiche, F., Zaidi, N. (2018) “Comparing nonlinear regression analysis and artificial neural networks to predict geotechnical parameters from standard penetration test” Urbanism. Architecture. Constructions, 9(13), 275-288, https://uac.incd.ro/Art/v9n3a08.pdf.
4. Benbouras, M. A., Kettab, R. M., Zedira, H., Petrisor, A. -I., Debiche, F. (2017) “Dry density in relation to other geotechnical proprieties of Algiers clay” Revista Şcolii Doctorale de Urbanism, 2(1), 5-14, http://rsdu.ro/Art/RSDUv2a01.pdf.
5. CGS, DTR-BC 2.48. (2003), Règles parasismiques algériennes RPA99 / version 2003, Centre national de recherche appliquée en génie-parasismique CGS, Alger, Algéria.
6. Childs, C. (2014) “Interpolating surfaces in ArcGIS spatial analyst” ArcUser, 32-35, https://community.esri.com/ccqpr47374/attachments/ccqpr47374/arcgis-spatial-analyst-questions/2376/1/interpolating.pdf.
7. Debiche, F., Kettab, R. M., Benbouras, M. A., Benbellil, B., Djerbal, L., Petrisor, A.-I. (2018) “Use of GIS systems to analyze soil compressibility, swelling and bearing capacity under superficial foundations in Algiers region, Algeria” Urbanism. Architecture. Constructions, 9(14), 357-370, http://uac.incd.ro/Art/v9n4a07.pdf.
8. Debiche, F. (2013) “Elaboration du modèle conceptuel de la base de données géotechniques "Géo-Base"“ Thèse de Magistère, Ecole Nationale Polytechnique, Département Génie Civil, Alger, Algerie, http://repository.enp.edu.dz/xmlui/handle/123456789/4084.
9. Ho, C. L., Skeels, J. O. (2003), GIS modeling of the subsurface stratigraphy, 12th Pan-American Conference on Soil Mechanics and Geotechnical Engineering, Cambridge, Massachusetts, USA, pp. 26-30.
10. Kim, D. S., Chung, C. K., Sun, C. G., Bang, E. S. (2002) “Site assessment and evaluation of spatial earthquake ground motion of Kyeongju” Soil Dynamics and Earthquake Engineering, 22(5), 371-387, DOI: https://doi.org/10.1016/S0267-7261(02)00023-4.
11. Orhan, A., Tosun, H. (2010) “Visualization of geotechnical data by means of geographic information system: a case study in Eskisehir city” Environmental Earth Sciences, 61(3), 455-465, DOI: https://doi.org/10.1007/s12665-009-0357-1.
12. Player, R. S. V. (2006), Geographic Information System (GIS) Use in Geotechnical Engineering, GeoCongress 2006: Geotechnical Engineering in the Information Technology Age, Georgia, United States, pp. 1-6, DOI: https://doi.org/10.1061/40803(187)123.
13. Rai, D. C., Murty, C. V. R. (2006) “Effects of the 2005 Muzaffarabad (Kashmir) earthquake on built environment” Current Science, 90(8), 1066-1070, https://www.iitk.ac.in/nicee/RP/2005_MuzaffarabadEQ_CurrentScience.pdf.
14. Sun, C. G. (2012) “Applications of a GIS-based geotechnical tool to assess spatial earthquake hazards in an urban area” Environmental Earth Sciences, 65(7), 1987-2001, DOI: https://doi.org/10.1007/s12665-011-1180-z.
15. Sun, C. G., Chung, C. K. (2008) “Assessment of site effects of a shallow and wide basin using geotechnical information-based spatial characterization” Soil Dynamics and Earthquake Engineering, 28(12), 1028-1044, DOI: https://doi.org/10.1016/j.soildyn.2007.11.005.
16. Wills, C. J., Petersen, M., Bryant, W.A., Reichle, M., Saucedo, G. J., Tan, S., Taylor, G, Treiman, J. (2000) “A site-conditions map for California based on geology and shear-wave velocity” Bulletin of the Seismological Society of America, 90(16B), 187–208, DOI: https://doi.org/10.1785/0120000503.

Text integral/Full text